Details:AirLayers - Versionsgeschichte

SebSta: hat „AirLayers“ nach „Details:AirLayers“ verschoben

2013-06-13T12:44:53Z

hat „AirLayers“ nach „Details:AirLayers“ verschoben

← Nächstältere Version	Version vom 13. Juni 2013, 14:44 Uhr
(kein Unterschied)

2009-03-25T09:52:36Z

Air Layers

← Nächstältere Version		Version vom 25. März 2009, 11:52 Uhr
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	<P>		<P>
	For the graphical display of the [[1D:Dialog_Assembly \| component assembly]], it		For the graphical display of the [[1D:Dialog_Assembly \| component assembly]], it
	will be advisable to choose ~~<FONT FACE="SYMBOL">D</FONT>~~x<SUP>*</SUP> equal to the real		will be advisable to choose Δx<SUP>*</SUP> equal to the real
	thickness. Note however that if you want to repeat the calculation with an air layer of		thickness. Note however that if you want to repeat the calculation with an air layer of
	a different thickness, it is not sufficient to simply adapt the layer thickness in the		a different thickness, it is not sufficient to simply adapt the layer thickness in the
	component assembly. Instead, ~~<FONT FACE="SYMBOL">l</FONT>~~<SUP>*</SUP> and		component assembly. Instead, λ<SUP>*</SUP> and
	µ<SUP>*</SUP> have to be newly determined from scratch.<BR>		µ<SUP>*</SUP> have to be newly determined from scratch.<BR>
	<BR>		<BR>

2009-03-25T09:50:38Z

Air Layers

← Nächstältere Version		Version vom 25. März 2009, 11:50 Uhr
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	according to the following:		according to the following:
	</P>		</P>
	* if ~~<FONT FACE="SYMBOL">D</FONT>~~x<SUP></SUP> was chosen not equal to the real thickness, multiplication of the 'bulk density' 1.29 kg/m³ by (real thickness)/~~<FONT FACE="SYMBOL">D</FONT>~~x<SUP></SUP> results in the correct heat capacity;		* if Δx<SUP></SUP> was chosen not equal to the real thickness, multiplication of the 'bulk density' 1.29 kg/m³ by (real thickness)/Δx<SUP></SUP> results in the correct heat capacity;
	* the 'porosity' should be chosen very high (e.g. 0.999 m³/m³);		* the 'porosity' should be chosen very high (e.g. 0.999 m³/m³);
	* the specific heat capacity by mass of the air layer is 1 kJ/kgK, even if ~~<FONT FACE="SYMBOL">D</FONT>~~x<SUP>*</SUP> is chosen not equal to the real thickness.		* the specific heat capacity by mass of the air layer is 1 kJ/kgK, even if Δx<SUP>*</SUP> is chosen not equal to the real thickness.

	<P>		<P>

2009-03-25T09:49:11Z

Air Layers

← Nächstältere Version		Version vom 25. März 2009, 11:49 Uhr
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	<P>		<P>
	Finally, we have the freedom to choose an arbitrary thickness		Finally, we have the freedom to choose an arbitrary thickness
	~~<FONT FACE="SYMBOL">D</FONT>~~x<SUP>*</SUP> with which the layer is included in the component		Δx<SUP>*</SUP> with which the layer is included in the component
	assembly for calculation, since the real thickness was already allowed for in the choice		assembly for calculation, since the real thickness was already allowed for in the choice
	of the specific value for R<SMALL>met</SMALL>.<BR>		of the specific value for R<SMALL>met</SMALL>.<BR>
	<BR>		<BR>
	<B>&micro<SUP></SUP></B> = 0.09 · R<SUB><SMALL>met</SMALL></SUB> / (3.5 · ~~<FONT FACE="SYMBOL">D</FONT>~~x<SUP></SUP>) <B>= 0.026 · R<SUB><SMALL>met</SMALL></SUB> / ~~<FONT FACE="SYMBOL">D</FONT>~~x<SUP>*</SUP></B><BR>		<B>µ<SUP></SUP></B> = 0.09 · R<SUB><SMALL>met</SMALL></SUB> / (3.5 · Δx<SUP></SUP>) <B>= 0.026 · R<SUB><SMALL>met</SMALL></SUB> / Δx<SUP>*</SUP></B><BR>
	<BR>		<BR>
	</P>		</P>

2009-03-25T09:46:17Z

Air Layers

← Nächstältere Version		Version vom 25. März 2009, 11:46 Uhr
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	<TD>water vapor diffusion resistance,</TD>		<TD>water vapor diffusion resistance,</TD>
	</TABLE>		</TABLE>
	<BR>		<BR>therefore<BR>
	therefore<BR>		<BR> <BR>
	<BR>		µ<SUP></SUP> = D<SUB>c</SUB> · S / Δx<SUP></SUP><BR>
	<BR>
	µ<SUP></SUP> = D<SUB>c</SUB> · S / ~~<FONT FACE="SYMBOL">D</FONT>~~x<SUP></SUP><BR>
	<BR>		<BR>
	But we have<BR>		But we have<BR>

2009-03-25T09:42:58Z

Air Layers

← Nächstältere Version		Version vom 25. März 2009, 11:42 Uhr
Zeile 67:		Zeile 67:
	<BR>		<BR>
	-g<SUB>v</SUB> = D<SUB>c</SUB> / µ<SUP>*</SUP> ·		-g<SUB>v</SUB> = D<SUB>c</SUB> / µ<SUP>*</SUP> ·
	~~<FONT FACE="SYMBOL">D</FONT>~~c / ~~<FONT FACE="SYMBOL">D</FONT>~~x<SUP>*</SUP>		Δc / Δx<SUP>*</SUP>
	= ~~<FONT FACE="SYMBOL">D</FONT>~~c / S<BR>		= Δc / S<BR>
	<BR>		<BR>
	<TABLE>		<TABLE>
Zeile 91:		Zeile 91:
	<TD>water vapor concentration</TD>		<TD>water vapor concentration</TD>
	</TR>		</TR>
	<TR><TD>~~<FONT FACE="SYMBOL">D</FONT>~~x<SUP>*</SUP></TD>		<TR><TD>Δx<SUP>*</SUP></TD>
	<TD>[m]</TD>		<TD>[m]</TD>
	<TD>:</TD>		<TD>:</TD>

2009-03-25T09:41:00Z

Air Layers

← Nächstältere Version		Version vom 25. März 2009, 11:41 Uhr
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	air layer as inserted in WUFI's component assembly. Then<BR>		air layer as inserted in WUFI's component assembly. Then<BR>
	<BR>		<BR>
	R<SUB><SMALL>non-met</SMALL></SUB> = ~~<FONT FACE="SYMBOL">D</FONT>~~x<SUP>*</SUP> /		R<SUB><SMALL>non-met</SMALL></SUB> = Δx<SUP>*</SUP> /
	~~<FONT FACE="SYMBOL">l</FONT>~~<SUP>*</SUP>,<BR>		λ<SUP>*</SUP>,<BR>
	<BR>		<BR>
	therefore<BR>		therefore<BR>
	<BR>		<BR>
	<B>~~<FONT FACE="SYMBOL">l</FONT>~~<SUP></SUP> = ~~<FONT FACE="SYMBOL">D</FONT>~~x<SUP></SUP>		<B>λ<SUP></SUP> = Δx<SUP></SUP>
	/ R<SUB>non-met</SUB></B>.<BR>		/ R<SUB>non-met</SUB></B>.<BR>
	<BR>		<BR>

2009-03-25T09:38:41Z

Air Layers

← Nächstältere Version		Version vom 25. März 2009, 11:38 Uhr
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	</P>		</P>
	<P>		<P>
	Now, for WUFI the effective heat conductivity ~~<FONT FACE="SYMBOL">l</FONT>~~<SUP>*</SUP>		Now, for WUFI the effective heat conductivity λ<SUP>*</SUP>
	has to be chosen so that for an air layer with a given thickness the heat resistance		has to be chosen so that for an air layer with a given thickness the heat resistance
	R<SMALL>non-met</SMALL> as		R<SMALL>non-met</SMALL> as

2009-03-25T09:37:04Z

Air Layers

← Nächstältere Version		Version vom 25. März 2009, 11:37 Uhr
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	layers</B>; they may even exhibit the same conditions as the exterior air. Building		layers</B>; they may even exhibit the same conditions as the exterior air. Building
	components outward from the air layer may then be disregarded except for their shielding		components outward from the air layer may then be disregarded except for their shielding
	of rain and radiation. ~~[##update: air change sources##]~~)		of rain and radiation.)
	</P>		</P>
	<P>		<P>

2009-03-25T09:36:41Z

Air Layers

← Nächstältere Version		Version vom 25. März 2009, 11:36 Uhr
Zeile 18:		Zeile 18:
	<P>		<P>
	The method is based on the following considerations which are valid for		The method is based on the following considerations which are valid for
	<B>non-ventilated</B> ~~air layers~~. (No general treatment is possible for <B>ventilated air		<B>non-ventilated air layers</B>. (No general treatment is possible for <B>ventilated air
	layers</B>; they may even exhibit the same conditions as the exterior air. Building		layers</B>; they may even exhibit the same conditions as the exterior air. Building
	components outward from the air layer may then be disregarded except for their shielding		components outward from the air layer may then be disregarded except for their shielding