Wufiwiki - Benutzerbeiträge [de]

Plus:Dialog BuildingWizard

2009-01-20T08:19:07Z

153.96.143.2: /* Automatic building wizard */

= Building =

The most important part of WUFI-Plus is the option to create a building. The '''Building Wizard''' is a tool to design a house for the simulation.

The design of the building can create by two ways. The easier way is to use the automatic tool of the wizard. With this tool it is possible to design simple footprints and typical roof and cellar constructions. When the footprint and building construction is more complicated as the available samples there is the possibility to design the building over a script.

=== Automatic building wizard ===

[[Bild:WUFI-Plus_BuidingWizard.png]]

With the automatic building wizard three essential points of a building can define, the footprint, the roof and the bottom offset. First of all you have to choose one of the proposed '''Main section''' (1), '''Roof''' (2)or '''Bottom offset''' (3). After this you can define the dimensions of the building. The yellow parts of the building are the heated zone and the white parts are unheated zones.

Below the selection graphs, given measures can be specified. These vary with the choice of footprint, roof or bottom offset.

After defining these the story height and the number of stories can be defined on the left bottom side of the dialog. On the bottom right side of the dialog the orientation of the main facade needs to be defined. The main facade depends on the footprint of the building and is shown in the selection graph for the footprint selection.

If a building needs to get modified it is important to check the "Preserve previous data after generation" button on the very bottom on the left like shown on the right side, if it is not wanted to overwrite all previous settings for assemblies and windows and so on.

[[image:DialogBuildingWizard_PreservePreviousData.png |Check box to preserve previous data]]

=== Unheated zones ===

If you want to design an unheated attached zone, like a wintergarden you can do this with the page '''Attached zone''' in the building wizard.

[[Bild:WUFI-Plus_BuildingWizard_attached.png]]

Plus:Dialog BuildingWizard

2009-01-20T08:17:56Z

153.96.143.2: /* Automatic building wizard */

= Building =

The most important part of WUFI-Plus is the option to create a building. The '''Building Wizard''' is a tool to design a house for the simulation.

The design of the building can create by two ways. The easier way is to use the automatic tool of the wizard. With this tool it is possible to design simple footprints and typical roof and cellar constructions. When the footprint and building construction is more complicated as the available samples there is the possibility to design the building over a script.

=== Automatic building wizard ===

[[Bild:WUFI-Plus_BuidingWizard.png]]

With the automatic building wizard three essential points of a building can define, the footprint, the roof and the bottom offset. First of all you have to choose one of the proposed '''Main section''' (1), '''Roof''' (2)or '''Bottom offset''' (3). After this you can define the dimensions of the building. The yellow parts of the building are the heated zone and the white parts are unheated zones.

Below the selection graphs, given measures can be specified. These vary with the choice of footprint, roof or bottom offset.

After defining these the story height and the number of stories can be defined on the left bottom side of the dialoge. On the bottom right side of the dialog the orientation of the main facade needs to be defined. The main facade depends on the footprint of the building and is shown in the selection graph for the [[Plus:DialogBuildingWizard#FootprintSelection|footprint]] selection.

If a building needs to get modified it is important to check the "Preserve previous data after generation" button on the very bottom on the left like shown on the right side, if it is not wanted to overwrite all previous settings for assemblies and windows and so on.

[[image:DialogBuildingWizard_PreservePreviousData.png |Check box to preserve previous data]]

=== Unheated zones ===

If you want to design an unheated attached zone, like a wintergarden you can do this with the page '''Attached zone''' in the building wizard.

[[Bild:WUFI-Plus_BuildingWizard_attached.png]]

Plus:Dialog BuildingWizard

2009-01-20T08:17:16Z

153.96.143.2: /* Building */

= Building =

The most important part of WUFI-Plus is the option to create a building. The '''Building Wizard''' is a tool to design a house for the simulation.

The design of the building can create by two ways. The easier way is to use the automatic tool of the wizard. With this tool it is possible to design simple footprints and typical roof and cellar constructions. When the footprint and building construction is more complicated as the available samples there is the possibility to design the building over a script.

=== Automatic building wizard ===

[[Bild:WUFI-Plus_BuidingWizard.png]]

With the automatic building wizard three essential points of a building can define, the footprint, the roof and the cellar. First of all you have to choose one of the proposed '''Main section''' (1), '''Roof''' (2)or '''Bottom offset''' (3). After this you can define the dimensions of the building. The yellow parts of the building are the heated zone and the white parts are unheated zones.

Below the selection graphs, given measures can be specified. These vary with the choice of footprint, roof or bottom offset.

After defining these the story height and the number of stories can be defined on the left bottom side of the dialoge. On the bottom right side of the dialog the orientation of the main facade needs to be defined. The main facade depends on the footprint of the building and is shown in the selection graph for the [[Plus:DialogBuildingWizard#FootprintSelection|footprint]] selection.

If a building needs to get modified it is important to check the "Preserve previous data after generation" button on the very bottom on the left like shown on the right side, if it is not wanted to overwrite all previous settings for assemblies and windows and so on.

[[image:DialogBuildingWizard_PreservePreviousData.png |Check box to preserve previous data]]

=== Unheated zones ===

If you want to design an unheated attached zone, like a wintergarden you can do this with the page '''Attached zone''' in the building wizard.

[[Bild:WUFI-Plus_BuildingWizard_attached.png]]

Plus:Dialog Climate

2008-10-28T08:16:25Z

153.96.143.2: /* External Climate */

= Dialog: Climate =

At its surfaces the building component is exposed to the
climatic boundary conditions which have a profound effect on its hygrothermic and inner climate behaviour. As discussed in the help topic [[Details:Climate | Climate data]],
WUFI needs for each time step data on the rain and radiation load, on the exterior
and interior temperature and on the exterior and interior relative humidity.


The designed building in WUFI-Plus has on the outer facade contact to the '''external climate'''. Each of the surfaces of the components must be assigned its respective boundary conditions. But here it is possible to assign a [[Plus:Dialog_Climate#External Climate | '''external climate''']] or an [[Plus:Dialog_Climate#Optional Climate | '''optional climate''']].


== External Climate ==

[[Bild:WUFI-Plus_Climate.png]]


The boundary conditions may be given as

* hourly data read from a climate file (describing an exterior climate),
* hourly interior conditions (describing an interior climate) derived from an exterior climate file through an appropriate model,
* schematic yearly sine curves (describing an exterior or interior climate).


The adjacently climates on the different components may be assigned only for the outside surface
of the component. The boundary condition on the outside of the component have not to be an external climate. If the heated zone of the building is boardering to another flat or room the external climate can be change to an [[Plus:Dialog_Climate#Optional Climate | optional climate]].



"Map/File":


[[Bild:WUFI-Plus_ExternalClimate.png]]


Choose this option if the boundary conditions are to be read from a
climate file.


The button "Browse..."
(1) opens a dialog in which you can select the
desired climate file
[[1D:Dialog_SelectClimateFileFromMap | on a map]] or through a
[[1D:Dialog_SelectClimateFileFromBrowser | open file dialog]]. 
The button "Details..."
(2) opens a subdialog which offers
[[1D:Dialog_ClimateFileDetails | additional options]], depending on
the [[Details:Climate | climate file format]] (e.g. to use measured surface
or ground temperatures etc.).


Once you have selected a climate file, WUFI will plot the temperature and the relative
humidity. The thin curves show the data read from the climate file, the bold curves
represent the centered moving monthly means for easier visual accessibility. 
  


If you have assigned the climate file to the left side of the component (the one
that can absorb rain and solar radiation) you may also have a climate analysis
performed.

[[Bild:DialogKlimaAussenInnen_b_03.gif]]


Click on the button "Analyze" to start the analysis. WUFI will
display the minimum, maximum and mean values of temperature and relative humidity,
the normal (i.e. vertical) rain sum and the directional distributions of solar
radiation and driving rain: 
The radiation rose shows the yearly sum of global radiation for receiving surfaces
with different orientations and inclinations, the driving rain rose shows the
yearly sum of driving rain on free-standing vertical surfaces
([[1D:Dialog_Orientation | R2]] = 0.2 s/m) with different orientations.


These data will give you an overview of the most important characteristics of the
selected climate file. In particular, the radiation and rain roses show the directions
from which the radiation and rain loads on the facade are mainly to be expected.


*.KLI files can not be analyzed, since their radiation and rain data have
already been converted for a fixed orientation and inclination. 
The analysis of *.WET files is independent of any options you may have selected
in the [[1D:Dialog_ClimateFileDetails | "Details..."]] subdialog;
that is, the temperature analysis always reads the air temperature from the file,
the radiation analysis always reads the global and diffuse radiation on a horizontal
surface and the driving rain analysis always reads the normal rain and the wind
speed and direction. 
  



If the boundary conditions assigned to the left side of the component are
being read from a climate file of
[[Details:WET-File | *.WET]],
[[Details:TRY-File | *.TRY]],
[[Details:DAT-File | *.DAT]],
[[Details:WAC-File | *.WAC]],
[[Details:IWC-File | *.IWC]] or
[[Details:WBC-File | *.WBC]] type, you also need to specify the
[[1D:Dialog_Orientation | orientation and inclination of the facade]] so that
WUFI can convert rain and solar radiation for that direction. In all other cases
either rain and radiation are irrelevant, or they have already been converted for
the proper orientation and inclination
([[Details:KLI-File | *.KLI]]).


Note: if a
[[Details:KLI-File |*.KLI]] file assigned to the right side of
the component has a time step which is different from the time step of the climate
on the left side (even if this is only due to rounding, e.g. 0.1667 h versus 0.167 h),
there may be synchronisation problem between the two sides. In such a case you should
let WUFI read the boundary conditions for both sides from one *.KLI file,
if possible. 
  



"Sine Curves":


[[Bild:DialogKlimaAussenInnen_c_03.gif]]


In some cases it is sufficient to ignore short-term fluctuations of the boundary
conditions and to consider only their long-term (e.g. yearly) trend (this is only
possible if the highly variable quantities rain and solar radiation play no role
anyway). Temperature and relative humidity may then be modelled by simple
sine curves with yearly period, or even by constant
values. 
These conditions are usually met by the interior climate: the daily variations
of indoor temperature and humidity are strongly damped by the heat and sorption
capacities of the furnishings; the remaining fluctuations do not penetrate far
into the building components and only have a negligible effect on their hygrothermal
behaviour. 
If the component is not affected by rain and solar radiation, and if its
hygrothermal capacity is large enough, even the exterior climate may be
modeled in this simplified way.


WUFI generates the temperature as a sine wave with one-year period from
the yearly mean value, the amplitude and the day of maximum
specified by the user. 
The default values suggested for indoor conditions (mean temperature: 20°C,
amplitude: 1°C, maximum on June 3rd) correspond to typical temperatures in
residential homes, as determined by measurements [1]. 
The default values suggested for exterior conditions (mean temperature: 9°C,
amplitude: 9°C, maximum on July 15th) correspond to typical conditions in
Germany [1]. 
Version notice: default values for exterior conditions are
only available in WUFI Pro.


WUFI generates the relative humidity as a sine wave with one-year period from
the yearly mean value, the amplitude and the day of maximum
specified by the user. 
  
The default values suggested for indoor conditions correspond to the average
humidities in residential homes under low, normal and high moisture
load [1]. 
  
The moisture load is the difference between the water vapor concentrations
of the indoor and the outdoor air. It depends on the indoor moisture
production and the air change rate: 
  
moisture load [g/m³] = moisture production [g/m³h] /
air change rate [1/h]. 
  

The default values suggested for exterior conditions (mean value: 80%, amplitude: 8%,
day of maximum: December 15th) correspond to typical conditions in
Germany [1].


If you wish to use other values than the defaults, choose
"User-Defined Sine Curve Parameters" from the drop-down list
and enter your values in the text boxes which can now be edited. If you want to
simply use constant values, you may hide the text boxes for amplitude and day of
maximum by checking the option "constant". 
Version notice: only WUFI Pro accepts user-defined sine
parameters.


If this option is used for the boundary conditions on the left side of
the component, no [[1D:Dialog_Orientation | orientation and inclination]]
need to be specified, since there is neither rain nor solar radiation.


Literature: 
[1] WTA-Merkblatt 6-2-01/D: Simulation wärme- und
feuchtetechnischer Prozesse. 
  



"EN 13788":

[[Bild:DialogKlimaAussenInnen_d_03.gif]]

With this option you can derive the interior climate from an exterior climate,
using the algorithm specified by DIN EN ISO 13788.


If this interior climate has been assigned to the right side of the component, and
a climate file has already been assigned to the left side as the exterior climate,
then you just need to check the option "Use Left Climate" to have the
interior climate derived from that file; this will be the standard case:

[[Bild:VonLinksVerwenden_E_1.gif]]

Instead, you may also derive the interior climate not from the climate file assigned
to the left side, but from some completely independent file. To do this, uncheck
the option "Use Left Climate", and select the desired climate file through
the button "Browse...". It is up to you to decide whether this makes
sense or not.


If the interior climate to be derived has been assigned to the left side of the
component, the climate file from which it is to be derived must always be
explicitly specified via "Browse...".


For the relative humidity, you may select one of four predefined humidity classes
from the drop-down list. You may also specify your own moisture load function by
selecting "User-defined" from the drop-down list: there appears
a table where you can enter your values for the function. 
  



Method of calculation:


The relative humidity for the interior climate is determined from the
interior air temperature (held fixed) and the absolute humidity Ni
of the interior air. For Ni, we have:


<TABLE>
<TR><TD WIDTH="20"> </TD>
<TD COLSPAN="3">Ni = Na +
dN  </TD>
</TR>
<TR><TD> </TD>
<TD VALIGN="TOP">Ni</TD>
<TD VALIGN="TOP">:</TD>
<TD VALIGN="TOP">interior absolute humidity,</TD>
</TR>
<TR><TD> </TD>
<TD VALIGN="TOP">Na</TD>
<TD VALIGN="TOP">:</TD>
<TD VALIGN="TOP">exterior absolute humidity,</TD>
</TR>
<TR><TD> </TD>
<TD VALIGN="TOP">dN</TD>
<TD VALIGN="TOP">:</TD>
<TD VALIGN="TOP">moisture supplement, determined from qa by means of the moisture load function Na.  </TD>
</TR>

<TR><TD> </TD>
<TD COLSPAN="3">Na = ja · absolute-humidity-at-saturation(q a)  </TD>
</TR>

<TR><TD> </TD>
<TD VALIGN="TOP">qa</TD>
<TD VALIGN="TOP">:</TD>
<TD VALIGN="TOP">monthly centered moving mean of exterior air temperature</TD>
</TR>
<TR><TD> </TD>
<TD VALIGN="TOP">ja</TD>
<TD VALIGN="TOP">:</TD>
<TD VALIGN="TOP">monthly centered moving mean of exterior relative humidity
  </TD>
</TR>
</TABLE>


If this option is used for the boundary conditions on the left side of the
component, no [[1D:Dialog_Orientation | orientation and inclination]] need to
be specified, since there is neither rain nor solar radiation.


Version notice: this option is only available in
WUFI Pro. 
  



"prEN 15026":


[[Bild:DialogKlimaAussenInnen_e_03.gif]]


With this option you can derive the interior climate from an exterior climate,
using the algorithm specified by prEN 15026.


If this interior climate has been assigned to the right side of the component, and
a climate file has already been assigned to the left side as the exterior climate,
then you just need to check the option "Use Left Climate" to have the
interior climate derived from that file; this will be the standard case:

[[Bild:VonLinksVerwenden_E_1.gif]]


Instead, you may also derive the interior climate not from the climate file assigned
to the left side, but from some completely independent file. To do this, uncheck
the option "Use Left Climate", and select the desired climate file through the
button "Browse...". It is up to you to decide whether this makes
sense or not.


If the interior climate to be derived has been assigned to the left side of the
component, the climate file from which it is to be derived must always be explicitly
specified via "Browse...". 
  



The interior air temperature is determined from the exterior air temperature by means
of a transfer function; the interior relative humidity is also determined from the
exterior air temperature by means of a transfer function:

<TABLE>
<TR><TD WIDTH="20"> </TD>
<TD COLSPAN="3">q i
= temperature-function(q a),</TD>
</TR>
<TR><TD> </TD>
<TD COLSPAN="3" VALIGN="TOP">j i = humidity-function(q a).
  </TD>
</TR>

<TR><TD> </TD>
<TD>q i</TD>
<TD>:</TD>
<TD>interior air temperature,</TD>
</TR>
<TR><TD> </TD>
<TD>j i</TD>
<TD>:</TD>
<TD>interior relative humidity,</TD>
</TR>
<TR><TD> </TD>
<TD>q a</TD>
<TD>:</TD>
<TD>daily centered moving mean of the exterior air temperature</TD>
</TABLE>

For the relative humidity, you may select one of two predefined moisture loads
from the drop-down list ("normal" and "high"). 
  



If this option is used for the boundary conditions on the left side of the
component, no [[1D:Dialog_Orientation | orientation and inclination]] needs to
be specified, since there is neither rain nor solar radiation. 
  


Version notice: this option is only available in
WUFI Pro. 
  



"ASHRAE 160P"


[[Bild:DialogKlimaAussenInnen_f_03.gif]]


With this option you can derive the interior climate from an exterior climate,
using the algorithm specified by ASHRAE Standard 160P.


For details please refer to: ASHRAE Standard 160P, "Design Criteria for Moisture
Control in Buildings" (Draft July 2006). WUFI determines the indoor climate by
the method illustrated in "Flowchart 3. Indoor design humidity, intermediate
method".


Version notice: this option is not available in WUFI light.
In WUFI ORNL/IBP only the predefined parameters can be used.

2D:Installation

2008-08-08T10:53:07Z

153.96.143.2: /* Installing WUFI-2D */

= Installing WUFI-2D =

This page describes the process of installing WUFI-2D and the folders that are created.

The menu-driven PC program WUFI® (Wärme und Feuchte instationär - Transient Heat and Moisture), developed by IBP and validated using data derived from outdoor and laboratory tests, allows realistic calculation of the transient hygrothermal behaviour of multi-layer building components exposed to natural climate conditions.
WUFI® is based on the newest findings regarding vapour diffusion and liquid transport in building materials.
WUFI® only requires standard material properties and easy-to-determine moisture storage and liquid transport functions.
WUFI® can use measured weather data - including driving rain and solar radiation - as boundary conditions, thus allowing realistic investigations on the behaviour of the component under exposure to natural weather.

'''WUFI® can be used for assessing'''
* the drying time of masonry with trapped construction moisture
* the danger of interstitial condensation
* the influence of driving rain on exterior building components
* the effect of repair and retrofit measures
* the hygrothermal performance of roof and wall assemblies under unanticipated use or in different climate zones.

== '''Computer Requirements:''' ==
* IBM-compatible Pentium-class computer.
* High speed is recommended for performance.
* At least 128 MB of random access memory (RAM).
* Microsoft Windows 2000TM or XPTM
* Java Runtime Environment 1.5 or higher
* Hard disk drive with at least 100 megabytes of available disk space.
* Additional 500 megabytes min. for the calculation results

== '''Installing the Program:''' ==
In order to install WUFI you need to have the system administrator rights. Put the program installation CD in the appropriate CD drive and follow the instructions.

2D:Dialog OptionsExport

2008-07-07T08:36:02Z

153.96.143.2: Die Seite wurde neu angelegt: = Dialog: Options | Export = Creates a self-extracting compressed file containing the result file and the result viewer WUFI-2D Motion. WUFI-2D uses Igor Pavlov's ...

= Dialog: Options | Export =


Creates a self-extracting compressed file containing the result file and the result viewer WUFI-2D Motion. WUFI-2D uses Igor Pavlov's 7-Zip file archiver.

2D:Dialog OptionsAdministrateModules

2008-07-07T08:35:09Z

153.96.143.2: Die Seite wurde neu angelegt: = Dialog: Options | Administrate Modules = (this menu item is currently not used)

= Dialog: Options | Administrate Modules =


(this menu item is currently not used)

2D:CollectingTheNecessaryData

2008-05-19T08:20:39Z

153.96.143.2: /* Climate data */

2D:CollectingTheNecessaryData

2008-04-29T15:23:21Z

153.96.143.2:

= Collecting the Necessary Data =

Of course, WUFI needs some data to perform the calculations. However, the
equations built into WUFI have been formulated in terms of quantities that
are well known or readily available, or can easily be measured or estimated.

This is what WUFI needs:

== Material data ==

These quantities define the hygrothermal behaviour of the materials:

==='' Basic Data: ''===

* '''bulk density''' [kg/m³]
* '''porosity''' [m³/m³]
* '''specific heat capacity of dry material''' [J/kgK]
* '''thermal conductivity of dry material''' [W/mK]
* '''water vapor diffusion resistance factor of dry material''' [-]

==='' Hygric Extensions: ''===

; '''moisture storage function''' [kg/m³]: as a table or approximated by sorption moisture at 80% RH (w80) and free saturation (wf),
; '''liquid transport coefficient for suction''' [m²/s]: as a table or generated from the water absorption coefficient (A-value),
; '''liquid transport coefficient for redistribution''' [m²/s]: as a table or generated from the water absorption coefficient (A-value),
; '''moisture-dependent thermal conductivity''' [W/mK]: as a table or generated from the moisture-induced thermal conductivity supplement,
; '''moisture-dependent vapor diffusion resistance factor''' [-]: as a table.

These material data are further discussed in the topic
<A HREF="MaterialData.htm">"Material Data"</A>.


The definition of the water vapor diffusion resistance factor (a.k.a. µ-value) and
related quantities is discussed in the topic
<A HREF="WaterVaporDiffusion.htm">"Water Vapor Diffusion"</A>.


For mathematical reasons, the basic data are required as a minimum for each
calculation; otherwise, the transport equations are not fully defined. 
The hygric extensions are refinements of the simulation model that are not
mathematically required, but they may well be necessary to fully and
appropriately describe the hygrothermal situation.


</LI>
<LI>
<H2>Climate data</H2>

These quantities define the boundary conditions at the surfaces of the building
component:

<UL>
<LI>rain load on the surface [Ltr/m²h], 
as dependent on the inclination and orientation of the building component,</LI>
<LI>short-wave (solar) radiation flux density [W/m²], 
as dependent on the inclination and orientation of the building component,</LI>
<LI>air temperature [°C],</LI>
<LI>relative humidity (0..1),</LI>
<LI>mean barometric pressure [hPa] over the calculation period,</LI>
<LI>atmospheric counterradiation [W/m²], if radiation cooling is to be
accounted for during the night.</LI>
</UL>

For each time step, WUFI reads these data from a climate file. Since the rain
load and the radiation flux are directional quantities, they must be evaluated in
dependence of the orientation and inclination of the building element. This
evaluation can be done with a preprocessor or by WUFI itself during the calculation.


In the former case, the preprocessed data are written to a file of
<A HREF="TheKLIFormatForClimateData.htm">*.KLI</A> type, in the
latter case WUFI expects climate data in
<A HREF="TheWETFormatForClimateData.htm">*.WET</A> or
<A HREF="TheTRYFormatForClimateData.htm">*.TRY</A> or
<A HREF="TheDATFormatForClimateData.htm">*.DAT</A> or
<A HREF="TheIWCFormatForClimateData.htm">*.IWC</A> or
<A HREF="TheWBCFormatForClimateData.htm">*.WBC</A> or
<A HREF="TheWACFormatForClimateData.htm">*.WAC</A> format. 
You can create files with your own data in any of these formats in order to use them
with WUFI.


Climate data and the climate file formats are further discussed in the topic
<A HREF="ClimateData.htm">"Climate Data"</A>.


</LI>
<LI>
<H2>Surface transfer coefficients</H2>

These quantities specify the coupling between the climate data and the conditions
in the building component:

<UL>
<LI>heat transfer coefficient [W/m²K]</LI>
<LI>vapor diffusion thickness, a.k.a. sd-value [m] 
allows to account for the diffusion-retarding effect of paint coats, wallpapers,
vapor retarders etc., if present, without the need to explicitly include these
layers in the component assembly,</LI>
<LI>short-wave (solar) radiation absorptivity [-],</LI>
<LI>long-wave (thermal) radiation emissivity [-] 
(can or must often be neglected, since data on sky and ground counterradiation are
rarely available),</LI>
<LI>rain water absorption factor [-] 
describes the reduction of rain water volume available for suction on
non-horizontal surfaces, since some water splashes off on impact.</LI>
</UL>

The water vapor transfer coefficients are automatically calculated from the heat
transfer coefficients and need not be specified separately.


The coefficients listed here are further discussed in the topic
<A HREF="SurfaceTransfer.htm">"Surface Transfer"</A>.

The definition of the vapor diffusion thickness and related quantities is discussed
in the topic <A HREF="WaterVaporDiffusion.htm">Water Vapor Diffusion</A>.


</LI>
<LI>

<H2>Initial conditions</H2>

The temperature and mosture fields of the building component must be initialized
with starting values for the temperature and the relative humidity. Currently,
WUFI-2D only allows constant values for both across each element of the component.


The initial conditions are further discussed in the help topic for the
dialog <A HREF="DialogInitialConditions.htm">"Initial Conditions"</A>.


</LI>
</UL>

<HR>
<TABLE width="100%"><TR>
<TD width="40%" align="left"><A HREF="HowDoIUseWufi.htm">Previous topic: How Do I Use WUFI?</A></TD>
<TD align="center">Topic 6</TD>
<TD width="40%" align="right"><A HREF="DefiningTheComponentAndTheNumericalGrid.htm">Next topic: Defining the Component and the Numerical Grid</A></TD>
</TR></TABLE>

<Object type="application/x-oleobject" classid="clsid:1e2a7bd0-dab9-11d0-b93a-00c04fc99f9e">
<param name="Keyword" value="A-value">
<param name="Keyword" value="barometric pressure">
<param name="Keyword" value="bulk density">
<param name="Keyword" value="climate data">
<param name="Keyword" value="heat capacity">
<param name="Keyword" value="heat conductivity">
<param name="Keyword" value="heat conductivity supplement">
<param name="Keyword" value="heat transfer coefficient">
<param name="Keyword" value="imbibition">
<param name="Keyword" value="initial conditions">
<param name="Keyword" value="liquid transport coefficient">
<param name="Keyword" value="long-wave radiation emissivity">
<param name="Keyword" value="material data">
<param name="Keyword" value="material properties">
<param name="Keyword" value="moisture storage function">
<param name="Keyword" value="permeability">
<param name="Keyword" value="permeance">
<param name="Keyword" value="porosity">
<param name="Keyword" value="rain">
<param name="Keyword" value="rain water absorption factor">
<param name="Keyword" value="redistribution">
<param name="Keyword" value="relative humidity">
<param name="Keyword" value="sd-value">
<param name="Keyword" value="short-wave radiation absorptivity">
<param name="Keyword" value="solar radiation">
<param name="Keyword" value="suction">
<param name="Keyword" value="surface transfer coefficients">
<param name="Keyword" value="temperature">
<param name="Keyword" value="thermal conductivity">
<param name="Keyword" value="thermal conductivity supplement">
<param name="Keyword" value="vapor diffusion thickness">
<param name="Keyword" value="water absorption coefficient">
<param name="Keyword" value="water vapor diffusion resistance factor">
<param name="Keyword" value="water vapor transfer coefficient">
</OBJECT>



</BODY>
</HTML>

2D:CollectingTheNecessaryData

2008-04-29T12:41:50Z

153.96.143.2: Die Seite wurde neu angelegt: = Collecting the Necessary Data = Of course, WUFI needs some data to perform the calculations. However, the equations built into WUFI have been formulated in terms of ...

= Collecting the Necessary Data =

Of course, WUFI needs some data to perform the calculations. However, the
equations built into WUFI have been formulated in terms of quantities that
are well known or readily available, or can easily be measured or estimated.

This is what WUFI needs:

== Material data ==

These quantities define the hygrothermal behaviour of the materials:

=== Basic Data: ===

* ''bulk density kg/m³ ''
<LI>porosity [m³/m³],</LI>
<LI>specific heat capacity of dry material [J/kgK]</LI>
<LI>thermal conductivity of dry material [W/mK]</LI>
<LI>water vapor diffusion resistance factor of dry material [-]</LI>
</UL>

<H3>Hygric Extensions:</H3>
<UL>
<LI>moisture storage function [kg/m³] 
as a table or approximated by sorption moisture at 80% RH (w80) and
free saturation (wf),</LI>
<LI>liquid transport coefficient for suction [m²/s] 
as a table or generated from the water absorption coefficient (A-value),</LI>
<LI>liquid transport coefficient for redistribution [m²/s] 
as a table or generated from the water absorption coefficient (A-value),</LI>
<LI>moisture-dependent thermal conductivity [W/mK] 
as a table or generated from the moisture-induced thermal conductivity
supplement,</LI>
<LI>moisture-dependent vapor diffusion resistance factor [-] 
as a table.</LI>
</UL>

These material data are further discussed in the topic
<A HREF="MaterialData.htm">"Material Data"</A>.


The definition of the water vapor diffusion resistance factor (a.k.a. µ-value) and
related quantities is discussed in the topic
<A HREF="WaterVaporDiffusion.htm">"Water Vapor Diffusion"</A>.


For mathematical reasons, the basic data are required as a minimum for each
calculation; otherwise, the transport equations are not fully defined. 
The hygric extensions are refinements of the simulation model that are not
mathematically required, but they may well be necessary to fully and
appropriately describe the hygrothermal situation.


</LI>
<LI>
<H2>Climate data</H2>

These quantities define the boundary conditions at the surfaces of the building
component:

<UL>
<LI>rain load on the surface [Ltr/m²h], 
as dependent on the inclination and orientation of the building component,</LI>
<LI>short-wave (solar) radiation flux density [W/m²], 
as dependent on the inclination and orientation of the building component,</LI>
<LI>air temperature [°C],</LI>
<LI>relative humidity (0..1),</LI>
<LI>mean barometric pressure [hPa] over the calculation period,</LI>
<LI>atmospheric counterradiation [W/m²], if radiation cooling is to be
accounted for during the night.</LI>
</UL>

For each time step, WUFI reads these data from a climate file. Since the rain
load and the radiation flux are directional quantities, they must be evaluated in
dependence of the orientation and inclination of the building element. This
evaluation can be done with a preprocessor or by WUFI itself during the calculation.


In the former case, the preprocessed data are written to a file of
<A HREF="TheKLIFormatForClimateData.htm">*.KLI</A> type, in the
latter case WUFI expects climate data in
<A HREF="TheWETFormatForClimateData.htm">*.WET</A> or
<A HREF="TheTRYFormatForClimateData.htm">*.TRY</A> or
<A HREF="TheDATFormatForClimateData.htm">*.DAT</A> or
<A HREF="TheIWCFormatForClimateData.htm">*.IWC</A> or
<A HREF="TheWBCFormatForClimateData.htm">*.WBC</A> or
<A HREF="TheWACFormatForClimateData.htm">*.WAC</A> format. 
You can create files with your own data in any of these formats in order to use them
with WUFI.


Climate data and the climate file formats are further discussed in the topic
<A HREF="ClimateData.htm">"Climate Data"</A>.


</LI>
<LI>
<H2>Surface transfer coefficients</H2>

These quantities specify the coupling between the climate data and the conditions
in the building component:

<UL>
<LI>heat transfer coefficient [W/m²K]</LI>
<LI>vapor diffusion thickness, a.k.a. sd-value [m] 
allows to account for the diffusion-retarding effect of paint coats, wallpapers,
vapor retarders etc., if present, without the need to explicitly include these
layers in the component assembly,</LI>
<LI>short-wave (solar) radiation absorptivity [-],</LI>
<LI>long-wave (thermal) radiation emissivity [-] 
(can or must often be neglected, since data on sky and ground counterradiation are
rarely available),</LI>
<LI>rain water absorption factor [-] 
describes the reduction of rain water volume available for suction on
non-horizontal surfaces, since some water splashes off on impact.</LI>
</UL>

The water vapor transfer coefficients are automatically calculated from the heat
transfer coefficients and need not be specified separately.


The coefficients listed here are further discussed in the topic
<A HREF="SurfaceTransfer.htm">"Surface Transfer"</A>.

The definition of the vapor diffusion thickness and related quantities is discussed
in the topic <A HREF="WaterVaporDiffusion.htm">Water Vapor Diffusion</A>.


</LI>
<LI>

<H2>Initial conditions</H2>

The temperature and mosture fields of the building component must be initialized
with starting values for the temperature and the relative humidity. Currently,
WUFI-2D only allows constant values for both across each element of the component.


The initial conditions are further discussed in the help topic for the
dialog <A HREF="DialogInitialConditions.htm">"Initial Conditions"</A>.


</LI>
</UL>

<HR>
<TABLE width="100%"><TR>
<TD width="40%" align="left"><A HREF="HowDoIUseWufi.htm">Previous topic: How Do I Use WUFI?</A></TD>
<TD align="center">Topic 6</TD>
<TD width="40%" align="right"><A HREF="DefiningTheComponentAndTheNumericalGrid.htm">Next topic: Defining the Component and the Numerical Grid</A></TD>
</TR></TABLE>

<Object type="application/x-oleobject" classid="clsid:1e2a7bd0-dab9-11d0-b93a-00c04fc99f9e">
<param name="Keyword" value="A-value">
<param name="Keyword" value="barometric pressure">
<param name="Keyword" value="bulk density">
<param name="Keyword" value="climate data">
<param name="Keyword" value="heat capacity">
<param name="Keyword" value="heat conductivity">
<param name="Keyword" value="heat conductivity supplement">
<param name="Keyword" value="heat transfer coefficient">
<param name="Keyword" value="imbibition">
<param name="Keyword" value="initial conditions">
<param name="Keyword" value="liquid transport coefficient">
<param name="Keyword" value="long-wave radiation emissivity">
<param name="Keyword" value="material data">
<param name="Keyword" value="material properties">
<param name="Keyword" value="moisture storage function">
<param name="Keyword" value="permeability">
<param name="Keyword" value="permeance">
<param name="Keyword" value="porosity">
<param name="Keyword" value="rain">
<param name="Keyword" value="rain water absorption factor">
<param name="Keyword" value="redistribution">
<param name="Keyword" value="relative humidity">
<param name="Keyword" value="sd-value">
<param name="Keyword" value="short-wave radiation absorptivity">
<param name="Keyword" value="solar radiation">
<param name="Keyword" value="suction">
<param name="Keyword" value="surface transfer coefficients">
<param name="Keyword" value="temperature">
<param name="Keyword" value="thermal conductivity">
<param name="Keyword" value="thermal conductivity supplement">
<param name="Keyword" value="vapor diffusion thickness">
<param name="Keyword" value="water absorption coefficient">
<param name="Keyword" value="water vapor diffusion resistance factor">
<param name="Keyword" value="water vapor transfer coefficient">
</OBJECT>



</BODY>
</HTML>

Discussion:Main

2008-04-16T07:11:40Z

153.96.143.2:

Please make sure, that the user is '''NOT''' the problem. After that proceed with the following:

== WUFI 1D Pro ==

hmm...

== WUFI 2D ==

haa...

== WUFI-Plus ==

=== Bugs ===
* Two graphs are shown on one page. If the date-axis is changed on the above graph, the second graph is then different - but only one x-axis label is available.
* Sometimes window can not be minimized

=== Problems ===

* By use of "Assign from Database" the setup is overridden without asking (asking happens only if "Edit" is used.
* How do I create a monopitch roof?
* Is the A/V ratio based on the internal or the external dimensions?
* How is the exterior climate data interpolated with shorter timesteps than available in the climate file? How big is the difference of simulations with hourly values and shorter timesteps?
* How are the ventilation control mechanisms exactly?
* How do I model groundwater? (I can only specify 100% RH but no fluid water on the surface)

=== Wishlist ===

* Time-dependent shading
* Specified saving options (without results, with general results, with results for each component) on one page, not seperately for each component
* Calculation results: Please add surface area in the component information part
* Differentiation between forced and natural air exchange (with possibility to read file)
* Preview of the created building in the building wizard
* Define standard dimensions of windows with frame reduction factor and adapt frame reduction factor with changing window dimensions
* Start "Calc Wufi" from header-dialog
* Delete "new case" button
* Give choice if one wants to copy windows for every storey in a multi-storey building
* Batch mode for WUFI Plus with automatic results file generation
* Possibility to read each boundary condition from file
* Save project without results

Discussion:Main

2008-04-14T08:24:26Z

153.96.143.2:

Plus:Menu

2008-04-03T14:07:07Z

153.96.143.2: Die Seite wurde neu angelegt: = WUFI Plus Menus = == Project == == Inputs == == Options == == Database == == Help ==

= WUFI Plus Menus =

== Project ==

== Inputs ==

== Options ==

== Database ==

== Help ==

Discussion:Main

2008-03-26T08:58:07Z

153.96.143.2:

Discussion:Main

2008-03-26T08:29:45Z

153.96.143.2:

Please make sure, that the user is '''NOT''' the problem. After that proceed with the following:

== WUFI 1D Pro ==

hmm...

== WUFI 2D ==

haa...

== WUFI-Plus ==

=== Bugs ===
* Two graphs are shown on one page. If the date-axis is changed on the above graph, the second graph is then different - but only one x-axis label is available.
* Sometimes window can not be minimized

=== Problems ===

* By use of "Assign from Database" the setup is overridden without asking (asking happens only if "Edit" is used.
* How do I create a monopitch roof?
* Is the A/V ratio based on the internal or the external dimensions?
* How is the exterior climate data interpolated with shorter timesteps than available in the climate file? How big is the difference of simulations with hourly values and shorter timesteps?
* How are the ventilation control mechanisms exactly?
* How do I model groundwater? (I can only specify 100% RH but no fluid water on the surface)
*

=== Wishlist ===

* Saisonal shading
* Specified saving options (without results, with general results, with results for each component) on one page, not seperately for each component
* Calculation results: Please add surface area in the component information part
* Differentiation between forced and natural air exchange (with possibility to read file)
* Preview of the created building in the building wizard
* Define standard dimensions of windows with frame reduction factor and adapt frame reduction factor with changing window dimensions
* Start "Calc Wufi" from header-dialog
* Delete "new case" button

Discussion:Main

2008-03-25T15:40:32Z

153.96.143.2:

Please make sure, that the user is '''NOT''' the problem. After that proceed with the following:

== WUFI 1D Pro ==

hmm...

== WUFI 2D ==

haa...

== WUFI-Plus ==

=== Bugs ===
* Two graphs are shown on one page. If the date-axis is changed on the above graph, the second graph is then different - but only one x-axis label is available.
* Sometimes window can not be minimized

=== Problems ===

* By use of "Assign from Database" the setup is overridden without asking (asking happens only if "Edit" is used.
* How do I create a monopitch roof?
* Is the A/V ratio based on the internal or the external dimensions?
* How is the exterior climate data interpolated with shorter timesteps than available in the climate file? How big is the difference of simulations with hourly values and shorter timesteps?
* How are the ventilation control mechanisms exactly?
* How do I model groundwater? (I can only specify 100% RH but no fluid water on the surface)
*

=== Wishlist ===

* Saisonal sheating
* Specified saving options (without results, with general results, with results for each component) on one page, not seperately for each component
* Calculation results: Please add surface area in the component information part
* Differentiation between forced and natural air exchange (with possibility to read file)
* Preview of the created building in the building wizard
* Define standard dimensions of windows with frame reduction factor and adapt frame reduction factor with changing window dimensions
* Start "Calc Wufi" from header-dialog
* Delete "new case" button

Discussion:Main

2008-03-25T15:40:18Z

153.96.143.2:

Please make sure, that the user is NOT the problem. After that proceed with the following:

== WUFI 1D Pro ==

hmm...

== WUFI 2D ==

haa...

== WUFI-Plus ==

=== Bugs ===
* Two graphs are shown on one page. If the date-axis is changed on the above graph, the second graph is then different - but only one x-axis label is available.
* Sometimes window can not be minimized

=== Problems ===

* By use of "Assign from Database" the setup is overridden without asking (asking happens only if "Edit" is used.
* How do I create a monopitch roof?
* Is the A/V ratio based on the internal or the external dimensions?
* How is the exterior climate data interpolated with shorter timesteps than available in the climate file? How big is the difference of simulations with hourly values and shorter timesteps?
* How are the ventilation control mechanisms exactly?
* How do I model groundwater? (I can only specify 100% RH but no fluid water on the surface)
*

=== Wishlist ===

* Saisonal sheating
* Specified saving options (without results, with general results, with results for each component) on one page, not seperately for each component
* Calculation results: Please add surface area in the component information part
* Differentiation between forced and natural air exchange (with possibility to read file)
* Preview of the created building in the building wizard
* Define standard dimensions of windows with frame reduction factor and adapt frame reduction factor with changing window dimensions
* Start "Calc Wufi" from header-dialog
* Delete "new case" button

Discussion:Main

2008-03-25T15:37:42Z

153.96.143.2:

== WUFI 1D Pro ==

hmm...

== WUFI 2D ==

haa...

== WUFI-Plus ==

=== Bugs ===
* Two graphs are shown on one page. If the date-axis is changed on the above graph, the second graph is then different - but only one x-axis label is available.
* Sometimes window can not be minimized

=== Problems ===

* By use of "Assign from Database" the setup is overridden without asking (asking happens only if "Edit" is used.
* How do I create a monopitch roof?
* Is the A/V ratio based on the internal or the external dimensions?
* How is the exterior climate data interpolated with shorter timesteps than available in the climate file? How big is the difference of simulations with hourly values and shorter timesteps?
* How are the ventilation control mechanisms exactly?
* How do I model groundwater? (I can only specify 100% RH but no fluid water on the surface)
*

=== Wishlist ===

* Saisonal sheating
* Specified saving options (without results, with general results, with results for each component) on one page, not seperately for each component
* Calculation results: Please add surface area in the component information part
* Differentiation between forced and natural air exchange (with possibility to read file)
* Preview of the created building in the building wizard
* Define standard dimensions of windows with frame reduction factor and adapt frame reduction factor with changing window dimensions
* Start "Calc Wufi" from header-dialog
* Delete "new case" button

Discussion:Main

2008-03-25T15:14:13Z

153.96.143.2: Die Seite wurde neu angelegt: == WUFI 1D Pro == hmm... == WUFI 2D == haa... == WUFI-Plus == === Bugs === === Problems === === Wishlist ===

== WUFI 1D Pro ==

hmm...

== WUFI 2D ==

haa...

== WUFI-Plus ==

=== Bugs ===

=== Problems ===

=== Wishlist ===

FAQ:PlusGeneral

2008-03-19T15:11:15Z

153.96.143.2: Die Seite wurde neu angelegt: == WUFI-Plus General FAQ == === When do I use WUFI-Plus === WUFI-Plus performs the step from looking only at the building element, like WUFI 1D or 2D does, to the who...

== WUFI-Plus General FAQ ==

=== When do I use WUFI-Plus ===

WUFI-Plus performs the step from looking only at the building element, like WUFI 1D or 2D does, to the whole building. Energy and moisture fluxes

FAQ:Main

2008-03-19T15:09:08Z

153.96.143.2: Die Seite wurde neu angelegt: == WUFI 1D Pro == Bla... == WUFI 2D == Bla... == WUFI-Plus == * General * ...

== WUFI 1D Pro ==

Bla...

== WUFI 2D ==

Bla...

== WUFI-Plus ==

* [[FAQ:PlusGeneral|General]]
* ...

Plus:Wufi Plus

2008-03-19T15:07:02Z

153.96.143.2:

= Main Page for WUFI Plus =
This page contains a [[Plus:Wufi_Plus#Manual|manual]] and a [[Plus:Wufi_Plus#Tutorial|tutorial]] for WUFI Plus. [[Plus:Usage|Here]] you can find, in which cases you can use WUFI-Plus and in which cases WUFI-Plus is not the tool of your choice.

== Manual ==

[[Plus:Installation|Installation]]
=== Install ===
* [[Plus:InstallInstall|Basic Installation]]
* [[Plus:InstallFolders|Created Folders]]

=== [[Plus:Menu|Menu]] ===
* [[Plus:MenuProjects|Projects]]
* [[Plus:MenuInputs|Inputs]]
* [[Plus:MenuOptions|Options]]
* [[Plus:MenuDatabase|Database]]
* [[Plus:MenuHelp|Help]]

=== [[Plus:Dialogs|Dialogs]] ===
* [[Plus:DialogBuildingWizard|Building Wizard]]
* blubb

=== [[Plus:Tree|Tree]] ===
* [[Plus:TreeClimate|Climate]]
* [[Plus:TreeBuilding|Building]]
** [[Plus:TreeZones|Zones]]
*** [[Plus:TreeComponents|Components]]
*** [[Plus:TreeAdditionalInnerComponents|Additional Inner Components]]
*** [[Plus:TreeInnerClimate|Inner Climate]]
**** [[Plus:TreeDesignConditions|Design Conditions]]
**** [[Plus:TreeLoads|Loads]]
**** [[Plus:TreeEquipment|Equipment]]
*** [[Plus:OtherParameters|Other Parameters]]
** [[Plus:TreeAttachedZones|Attached Zones]]

== Tutorial ==
* [[Plus:HowTo|How to use?]]
* [[Plus:Input | What do I need?]]
* [[Plus:Output | What do I get and how do I work with the results?]]
* [[Plus:Batch | How do I run WUFI Plus in batch mode?]]

Plus:Wufi Plus

2008-03-12T16:00:16Z

153.96.143.2:

Plus:Tree

2008-03-12T15:51:46Z

153.96.143.2:

= The Wufi-Plus GUI =

== Screenshot ==

[[Bild:allgemein.gif|450px]]

General Content of the WUFI-Plus GUI

Plus:Tree

2008-03-12T15:51:34Z

153.96.143.2:

= The Wufi-Plus GUI =

== Screenshot ==

[[Bild:allgemein.gif|450px]]

General Content of the WUFI-Plus GUI

Plus:Tree

2008-03-12T15:51:24Z

153.96.143.2:

= The Wufi-Plus GUI =

== Screenshot ==

[[Bild:allgemein.gif|120px]]

General Content of the WUFI-Plus GUI

Plus:Tree

2008-03-12T15:50:06Z

153.96.143.2:

= The Wufi-Plus GUI =

== Screenshot ==

[[Bild:allgemein.gif|px120]]

General Content of the WUFI-Plus GUI