Len: /* What is WUFI? */

2008-09-30T08:08:03Z

What is WUFI?

← Nächstältere Version		Version vom 30. September 2008, 10:08 Uhr
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	doctoral thesis:		doctoral thesis:
	</P>		</P>
	~~<TABLE>~~		Künzel, H.M.:<BR>
	~~<TR><TD WIDTH="10"> </TD>~~		Verfahren zur ein- und zweidimensionalen Berechnung des gekoppelten Wärme- und Feuchtetransports in Bauteilen mit einfachen Kennwerten.<BR> Dissertation Universität Stuttgart 1994<BR>  <BR> (may be ordered from IBP: [[http://www.hoki.ibp.fhg.de/index.html \| http://www.hoki.ibp.fhg.de/index.html]])<BR>
	~~<TD>~~Künzel, H.M.:<BR>		<BR>
	Verfahren zur ein- und zweidimensionalen Berechnung des gekoppelten Wärme-		or<BR>
	und Feuchtetransports in Bauteilen mit einfachen Kennwerten.<BR>		<BR>
	Dissertation Universität Stuttgart 1994<BR>		Künzel, H.M.:<BR>
	<BR>		Simultaneous Heat and Moisture Transport in Building Components.<BR> One- and two-dimensional calculation using simple parameters.<BR> IRB Verlag 1995<BR>
	(may be ordered from IBP: [[http://www.hoki.ibp.fhg.de/index.html \|		<BR>
	http://www.hoki.ibp.fhg.de/index.html]])<BR>		(may be ordered from IRB Verlag, Stuttgart: [[http://www.irb.fhg.de \|
	<BR>		http://www.irb.fhg.de]]).<BR>
	~~</TD>~~		<BR>
	~~</TR>~~
	~~<TR><TD> </TD>~~
	~~<TD>~~or<BR>
	<BR>
	~~</TD>~~
	~~</TR>~~
	~~<TR><TD> </TD>~~
	~~<TD>~~Künzel, H.M.:<BR>
	Simultaneous Heat and Moisture Transport in Building Components.<BR>
	One- and two-dimensional calculation using simple parameters.<BR>
	IRB Verlag 1995<BR>
	<BR>
	(may be ordered from IRB Verlag, Stuttgart: ~~<A HREF="~~http://www.irb.fhg.de">
	http://www.irb.fhg.de~~</A>~~).<BR>
	<BR>
	~~</TD>~~
	~~</TR>~~
	~~</TABLE~~>

	<P>		<P>

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WUFI is the acronym for "Wärme- und Feuchtetransport instationär" ("Transient Heat and Moist...

2008-09-30T08:06:17Z

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= What is WUFI? =


WUFI is the acronym for "Wärme- und Feuchtetransport
instationär" ("Transient Heat and Moisture Transport").


WUFI is designed to calculate the simultaneous heat and moisture transport in
one-dimensional multi-layered building components.


A comfortable Windows® user interface allows quick set-up of a
calculation project, easy change of parameters for numerical experiments and
comfortable viewing of the results as graphics or a 'film'.


The physical and numerical ideas underlying WUFI are developed and discussed in the
doctoral thesis:

<TABLE>
<TR><TD WIDTH="10"> </TD>
<TD>Künzel, H.M.: 
Verfahren zur ein- und zweidimensionalen Berechnung des gekoppelten Wärme-
und Feuchtetransports in Bauteilen mit einfachen Kennwerten. 
Dissertation Universität Stuttgart 1994 
  
(may be ordered from IBP: [[http://www.hoki.ibp.fhg.de/index.html |
http://www.hoki.ibp.fhg.de/index.html]]) 
  
</TD>
</TR>
<TR><TD> </TD>
<TD>or 
  
</TD>
</TR>
<TR><TD> </TD>
<TD>Künzel, H.M.: 
Simultaneous Heat and Moisture Transport in Building Components. 
One- and two-dimensional calculation using simple parameters. 
IRB Verlag 1995 
  
(may be ordered from IRB Verlag, Stuttgart: <A HREF="http://www.irb.fhg.de">
http://www.irb.fhg.de</A>). 
  
</TD>
</TR>
</TABLE>


In the calculation of heat transport, WUFI takes into account:

* thermal conduction
* enthalpy flows through moisture movement with phase change
* short-wave solar radiation
* nighttime long-wave radiation cooling (with [[Details:TRY-File | TRY]], [[Details:DAT-File | DAT]], [[Details:WAC-File | WAC]] and [[Details:WBC-File | WBC]] weather data only).


Convective heat transport by air flows has been disregarded, since it is usually
difficult to quantify and rarely one-dimensional. 
  



The vapor transport mechanisms included in WUFI are:

* vapor diffusion
* solution diffusion.


Again, convective vapor transport by air flows has been ignored. 
  



The liquid transport mechanisms taken into account are:

*capillary conduction
*surface diffusion.


Seepage flow through gravitation, hydraulic flow through pressure differentials,
as well as electrokinetic and osmotic effects have not been included. 
  



The choice of temperature and relative humidity as driving potentials allows the use
of simple, easily comprehensible storage and transport coefficients. These can also
readily be derived from standard material data if no measured data are available and
utmost precision of the results is not required. 
  



The boundary conditions for each time step are expressed in terms of meteorological
data (temperature, relative humidity, driving rain, radiation), since in building
physics these are the relevant parameters specifying the conditions at surfaces
exposed to natural weather. 
However, conditions for laboratory experiments (e.g. imbibition measurements) can
also be expressed as 'meteorological' data. 
Heat, moisture and air change sources may be specified within the component.

1D:Wufi 1D What is - Versionsgeschichte

Len: /* What is WUFI? */

Len: Die Seite wurde neu angelegt: = What is WUFI? = WUFI is the acronym for "Wärme- und Feuchtetransport instationär" ("Transient Heat and Moist...

Len: Die Seite wurde neu angelegt: = What is WUFI? =
WUFI is the acronym for "Wärme- und Feuchtetransport instationär" ("Transient Heat and Moist...