SebSta: hat „FAQ General:VolumePercent,MassPercent“ nach „FAQ:General:VolumePercent,MassPercent“ verschoben

2013-06-13T12:23:16Z

hat „FAQ General:VolumePercent,MassPercent“ nach „FAQ:General:VolumePercent,MassPercent“ verschoben

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Len am 2. Oktober 2008 um 07:58 Uhr

2008-10-02T07:58:08Z

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	volume percent. However, I need the result in mass percent. How do I convert the		volume percent. However, I need the result in mass percent. How do I convert the
	results?</B><BR>		results?</B><BR>
	~~</P>~~

	<P>		<P>

Len: Die Seite wurde neu angelegt: = (3): Volume Percent, Mass Percent WUFI gives me the water content of the simulated wall in units of kg/m³ or in volume percent. However, I need the result in...

2008-10-02T07:57:52Z

Die Seite wurde neu angelegt: = (3): Volume Percent, Mass Percent <B>WUFI gives me the water content of the simulated wall in units of kg/m³ or in volume percent. However, I need the result in...

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= (3): Volume Percent, Mass Percent

<B>WUFI gives me the water content of the simulated wall in units of kg/m³ or in
volume percent. However, I need the result in mass percent. How do I convert the
results?</B><BR>
</P>

<P>
WUFI usually gives the water content as "water density", i.e. how many kg of water are
in one m³ of building material.<BR>
A result given in volume percent tells you how many m³ of water are in one m³ of
building material (expressed as percentage).<BR>
A result given in mass percent tells you how many kg of water are in one kg of dry
building material (expressed as percentage). Please note that the water content in
mass percent may easily exceed 100% if the dry material has low density.
</P>

<P>
With
</P>
<TABLE>
<TR><TD><TT>m_W</TT> :</TD><TD>mass of the water in the component</TD></TR>
<TR><TD><TT>r_W</TT> :</TD><TD>density of water (= 1000 kg/m³)</TD></TR>
<TR><TD><TT>V_W</TT> :</TD><TD>volume of the water in the component</TD></TR>
<TR><TD><TT>m_C</TT> :</TD><TD>mass of the component</TD></TR>
<TR><TD><TT>r_C</TT> :</TD><TD>density of the (dry) component</TD></TR>
<TR><TD><TT>V_C</TT> :</TD><TD>volume of the component</TD></TR>
</TABLE>
<P>
we have
</P>
<TABLE>
<TR><TD COLSPAN="3">water content as expressed by WUFI:</TD></TR>

<TR><TD COLSPAN="3"> </TD></TR>

<TR><TD> </TD><TD><TT>u</TT></TD><TD><TT>= m_W / V_C [kg/m³]</TT></TD></TR>

<TR><TD COLSPAN="3"> </TD></TR>

<TR><TD COLSPAN="3">water content expressed in volume percent:</TD></TR>

<TR><TD COLSPAN="3"> </TD></TR>

<TR><TD> </TD><TD><TT>u_v</TT></TD><TD><TT>= V_W / V_C * 100</TT></TD></TR>

<TR><TD> </TD><TD> </TD><TD><TT>= (m_W / r_W) / V_C * 100</TT></TD></TR>

<TR><TD> </TD><TD> </TD><TD><TT>= (m_W / V_C) / r_W * 100</TT></TD></TR>

<TR><TD> </TD><TD> </TD><TD><TT>= u * 100 / r_W</TT></TD></TR>

<TR><TD> </TD><TD> </TD><TD><TT>= u * 100 / 1000</TT></TD></TR>

<TR><TD> </TD><TD> </TD><TD><TT>= u / 10</TT></TD></TR>

<TR><TD COLSPAN="3"> </TD></TR>

<TR><TD COLSPAN="3">water content expressed in mass percent:</TD></TR>

<TR><TD> </TD><TD><TT>u_m</TT></TD><TD><TT>= m_W / m_C * 100</TT></TD></TR>

<TR><TD> </TD><TD> </TD><TD><TT>= m_W / (r_C * V_C ) * 100</TT></TD></TR>

<TR><TD> </TD><TD> </TD><TD><TT>= (m_W / V_C) * (100 / r_C)</TT></TD></TR>

<TR><TD> </TD><TD> </TD><TD><TT>= u * (100 / r_C)</TT></TD></TR>

<TR><TD> </TD><TD> </TD><TD><TT>= u / (r_C / 100)</TT></TD></TR>
</TABLE>
<P>
So you get the water content in volume percent if you divide the
WUFI result [kg/m³] by <TT>10</TT>.<BR>
You get the water content in mass percent if you divide the WUFI
result by <TT>(density of the building component / 100)</TT>.
</P>

FAQ:General:VolumePercent,MassPercent - Versionsgeschichte

SebSta: hat „FAQ General:VolumePercent,MassPercent“ nach „FAQ:General:VolumePercent,MassPercent“ verschoben

Len am 2. Oktober 2008 um 07:58 Uhr

Len: Die Seite wurde neu angelegt: = (3): Volume Percent, Mass Percent WUFI gives me the water content of the simulated wall in units of kg/m³ or in volume percent. However, I need the result in...