Numerical study of time-dependent hygrothermal conditions in depressurized crawl space
Abstract A finite element based hygrothermal model consisting of several interconnected components with varying number of spatial dimensions was applied to analyze the time-dependent temperature and humidity conditions of a mechanically depressurized and ventilated crawl space. Purpose of the depres...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Salo, Juha [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2018 |
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| Schlagwörter: |
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| Anmerkung: |
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018 |
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| Übergeordnetes Werk: |
Enthalten in: Building simulation - Beijing : Tsinghua Press, 2008, 11(2018), 6 vom: 03. Mai, Seite 1067-1081 |
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| Übergeordnetes Werk: |
volume:11 ; year:2018 ; number:6 ; day:03 ; month:05 ; pages:1067-1081 |
| Links: |
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| DOI / URN: |
10.1007/s12273-018-0447-7 |
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| Katalog-ID: |
SPR024702706 |
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| 245 | 1 | 0 | |a Numerical study of time-dependent hygrothermal conditions in depressurized crawl space |
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| 520 | |a Abstract A finite element based hygrothermal model consisting of several interconnected components with varying number of spatial dimensions was applied to analyze the time-dependent temperature and humidity conditions of a mechanically depressurized and ventilated crawl space. Purpose of the depressurization is to prevent the intrusion of radon or other insanitary particles into indoor air. However, in typical foundation structures the depressurization will cause airflow from soil into the crawl space air and it may convey excessive moisture making the hygrothermal conditions potential for mould growth or other moisture-induced biological damage, which is not considered to be acceptable even with the depressurization. Although in general the forced convection of humidity from soil presumably increases relative humidity in crawl space, significant heat capacity of the ground may warm the air flowing into the crawl space and thus decrease the relative humidity. Overall effect of the depressurization on the conditions in crawl space is therefore not trivial. Because a full-scale three-dimensional finite element analysis of heat, mass and momentum transfer in crawl space and its surroundings would require excessive computational resources, several simplifications were necessary to apply in the model. According to the numerical results, the airflow through drainage layer into crawl space does not seem to have severe effect on the crawl space conditions. Conversely, in cold periods the relative humidity in crawl space is very low because of the air temperature is increased while flowing through the drainage layer. | ||
| 650 | 4 | |a crawl space |7 (dpeaa)DE-He213 | |
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| 650 | 4 | |a multicomponent hygrothermal model |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a COMSOL Multiphysics |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Huttunen, Petteri |4 aut | |
| 700 | 1 | |a Vinha, Juha |4 aut | |
| 700 | 1 | |a Keskikuru, Timo |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Building simulation |d Beijing : Tsinghua Press, 2008 |g 11(2018), 6 vom: 03. Mai, Seite 1067-1081 |w (DE-627)564750867 |w (DE-600)2422327-X |x 1996-8744 |7 nnns |
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10.1007/s12273-018-0447-7 doi (DE-627)SPR024702706 (SPR)s12273-018-0447-7-e DE-627 ger DE-627 rakwb eng Salo, Juha verfasserin aut Numerical study of time-dependent hygrothermal conditions in depressurized crawl space 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract A finite element based hygrothermal model consisting of several interconnected components with varying number of spatial dimensions was applied to analyze the time-dependent temperature and humidity conditions of a mechanically depressurized and ventilated crawl space. Purpose of the depressurization is to prevent the intrusion of radon or other insanitary particles into indoor air. However, in typical foundation structures the depressurization will cause airflow from soil into the crawl space air and it may convey excessive moisture making the hygrothermal conditions potential for mould growth or other moisture-induced biological damage, which is not considered to be acceptable even with the depressurization. Although in general the forced convection of humidity from soil presumably increases relative humidity in crawl space, significant heat capacity of the ground may warm the air flowing into the crawl space and thus decrease the relative humidity. Overall effect of the depressurization on the conditions in crawl space is therefore not trivial. Because a full-scale three-dimensional finite element analysis of heat, mass and momentum transfer in crawl space and its surroundings would require excessive computational resources, several simplifications were necessary to apply in the model. According to the numerical results, the airflow through drainage layer into crawl space does not seem to have severe effect on the crawl space conditions. Conversely, in cold periods the relative humidity in crawl space is very low because of the air temperature is increased while flowing through the drainage layer. crawl space (dpeaa)DE-He213 depressurization (dpeaa)DE-He213 multicomponent hygrothermal model (dpeaa)DE-He213 COMSOL Multiphysics (dpeaa)DE-He213 Huttunen, Petteri aut Vinha, Juha aut Keskikuru, Timo aut Enthalten in Building simulation Beijing : Tsinghua Press, 2008 11(2018), 6 vom: 03. Mai, Seite 1067-1081 (DE-627)564750867 (DE-600)2422327-X 1996-8744 nnns volume:11 year:2018 number:6 day:03 month:05 pages:1067-1081 https://dx.doi.org/10.1007/s12273-018-0447-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 11 2018 6 03 05 1067-1081 |
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10.1007/s12273-018-0447-7 doi (DE-627)SPR024702706 (SPR)s12273-018-0447-7-e DE-627 ger DE-627 rakwb eng Salo, Juha verfasserin aut Numerical study of time-dependent hygrothermal conditions in depressurized crawl space 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract A finite element based hygrothermal model consisting of several interconnected components with varying number of spatial dimensions was applied to analyze the time-dependent temperature and humidity conditions of a mechanically depressurized and ventilated crawl space. Purpose of the depressurization is to prevent the intrusion of radon or other insanitary particles into indoor air. However, in typical foundation structures the depressurization will cause airflow from soil into the crawl space air and it may convey excessive moisture making the hygrothermal conditions potential for mould growth or other moisture-induced biological damage, which is not considered to be acceptable even with the depressurization. Although in general the forced convection of humidity from soil presumably increases relative humidity in crawl space, significant heat capacity of the ground may warm the air flowing into the crawl space and thus decrease the relative humidity. Overall effect of the depressurization on the conditions in crawl space is therefore not trivial. Because a full-scale three-dimensional finite element analysis of heat, mass and momentum transfer in crawl space and its surroundings would require excessive computational resources, several simplifications were necessary to apply in the model. According to the numerical results, the airflow through drainage layer into crawl space does not seem to have severe effect on the crawl space conditions. Conversely, in cold periods the relative humidity in crawl space is very low because of the air temperature is increased while flowing through the drainage layer. crawl space (dpeaa)DE-He213 depressurization (dpeaa)DE-He213 multicomponent hygrothermal model (dpeaa)DE-He213 COMSOL Multiphysics (dpeaa)DE-He213 Huttunen, Petteri aut Vinha, Juha aut Keskikuru, Timo aut Enthalten in Building simulation Beijing : Tsinghua Press, 2008 11(2018), 6 vom: 03. Mai, Seite 1067-1081 (DE-627)564750867 (DE-600)2422327-X 1996-8744 nnns volume:11 year:2018 number:6 day:03 month:05 pages:1067-1081 https://dx.doi.org/10.1007/s12273-018-0447-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 11 2018 6 03 05 1067-1081 |
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10.1007/s12273-018-0447-7 doi (DE-627)SPR024702706 (SPR)s12273-018-0447-7-e DE-627 ger DE-627 rakwb eng Salo, Juha verfasserin aut Numerical study of time-dependent hygrothermal conditions in depressurized crawl space 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract A finite element based hygrothermal model consisting of several interconnected components with varying number of spatial dimensions was applied to analyze the time-dependent temperature and humidity conditions of a mechanically depressurized and ventilated crawl space. Purpose of the depressurization is to prevent the intrusion of radon or other insanitary particles into indoor air. However, in typical foundation structures the depressurization will cause airflow from soil into the crawl space air and it may convey excessive moisture making the hygrothermal conditions potential for mould growth or other moisture-induced biological damage, which is not considered to be acceptable even with the depressurization. Although in general the forced convection of humidity from soil presumably increases relative humidity in crawl space, significant heat capacity of the ground may warm the air flowing into the crawl space and thus decrease the relative humidity. Overall effect of the depressurization on the conditions in crawl space is therefore not trivial. Because a full-scale three-dimensional finite element analysis of heat, mass and momentum transfer in crawl space and its surroundings would require excessive computational resources, several simplifications were necessary to apply in the model. According to the numerical results, the airflow through drainage layer into crawl space does not seem to have severe effect on the crawl space conditions. Conversely, in cold periods the relative humidity in crawl space is very low because of the air temperature is increased while flowing through the drainage layer. crawl space (dpeaa)DE-He213 depressurization (dpeaa)DE-He213 multicomponent hygrothermal model (dpeaa)DE-He213 COMSOL Multiphysics (dpeaa)DE-He213 Huttunen, Petteri aut Vinha, Juha aut Keskikuru, Timo aut Enthalten in Building simulation Beijing : Tsinghua Press, 2008 11(2018), 6 vom: 03. Mai, Seite 1067-1081 (DE-627)564750867 (DE-600)2422327-X 1996-8744 nnns volume:11 year:2018 number:6 day:03 month:05 pages:1067-1081 https://dx.doi.org/10.1007/s12273-018-0447-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 11 2018 6 03 05 1067-1081 |
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10.1007/s12273-018-0447-7 doi (DE-627)SPR024702706 (SPR)s12273-018-0447-7-e DE-627 ger DE-627 rakwb eng Salo, Juha verfasserin aut Numerical study of time-dependent hygrothermal conditions in depressurized crawl space 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract A finite element based hygrothermal model consisting of several interconnected components with varying number of spatial dimensions was applied to analyze the time-dependent temperature and humidity conditions of a mechanically depressurized and ventilated crawl space. Purpose of the depressurization is to prevent the intrusion of radon or other insanitary particles into indoor air. However, in typical foundation structures the depressurization will cause airflow from soil into the crawl space air and it may convey excessive moisture making the hygrothermal conditions potential for mould growth or other moisture-induced biological damage, which is not considered to be acceptable even with the depressurization. Although in general the forced convection of humidity from soil presumably increases relative humidity in crawl space, significant heat capacity of the ground may warm the air flowing into the crawl space and thus decrease the relative humidity. Overall effect of the depressurization on the conditions in crawl space is therefore not trivial. Because a full-scale three-dimensional finite element analysis of heat, mass and momentum transfer in crawl space and its surroundings would require excessive computational resources, several simplifications were necessary to apply in the model. According to the numerical results, the airflow through drainage layer into crawl space does not seem to have severe effect on the crawl space conditions. Conversely, in cold periods the relative humidity in crawl space is very low because of the air temperature is increased while flowing through the drainage layer. crawl space (dpeaa)DE-He213 depressurization (dpeaa)DE-He213 multicomponent hygrothermal model (dpeaa)DE-He213 COMSOL Multiphysics (dpeaa)DE-He213 Huttunen, Petteri aut Vinha, Juha aut Keskikuru, Timo aut Enthalten in Building simulation Beijing : Tsinghua Press, 2008 11(2018), 6 vom: 03. Mai, Seite 1067-1081 (DE-627)564750867 (DE-600)2422327-X 1996-8744 nnns volume:11 year:2018 number:6 day:03 month:05 pages:1067-1081 https://dx.doi.org/10.1007/s12273-018-0447-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 11 2018 6 03 05 1067-1081 |
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10.1007/s12273-018-0447-7 doi (DE-627)SPR024702706 (SPR)s12273-018-0447-7-e DE-627 ger DE-627 rakwb eng Salo, Juha verfasserin aut Numerical study of time-dependent hygrothermal conditions in depressurized crawl space 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract A finite element based hygrothermal model consisting of several interconnected components with varying number of spatial dimensions was applied to analyze the time-dependent temperature and humidity conditions of a mechanically depressurized and ventilated crawl space. Purpose of the depressurization is to prevent the intrusion of radon or other insanitary particles into indoor air. However, in typical foundation structures the depressurization will cause airflow from soil into the crawl space air and it may convey excessive moisture making the hygrothermal conditions potential for mould growth or other moisture-induced biological damage, which is not considered to be acceptable even with the depressurization. Although in general the forced convection of humidity from soil presumably increases relative humidity in crawl space, significant heat capacity of the ground may warm the air flowing into the crawl space and thus decrease the relative humidity. Overall effect of the depressurization on the conditions in crawl space is therefore not trivial. Because a full-scale three-dimensional finite element analysis of heat, mass and momentum transfer in crawl space and its surroundings would require excessive computational resources, several simplifications were necessary to apply in the model. According to the numerical results, the airflow through drainage layer into crawl space does not seem to have severe effect on the crawl space conditions. Conversely, in cold periods the relative humidity in crawl space is very low because of the air temperature is increased while flowing through the drainage layer. crawl space (dpeaa)DE-He213 depressurization (dpeaa)DE-He213 multicomponent hygrothermal model (dpeaa)DE-He213 COMSOL Multiphysics (dpeaa)DE-He213 Huttunen, Petteri aut Vinha, Juha aut Keskikuru, Timo aut Enthalten in Building simulation Beijing : Tsinghua Press, 2008 11(2018), 6 vom: 03. Mai, Seite 1067-1081 (DE-627)564750867 (DE-600)2422327-X 1996-8744 nnns volume:11 year:2018 number:6 day:03 month:05 pages:1067-1081 https://dx.doi.org/10.1007/s12273-018-0447-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 11 2018 6 03 05 1067-1081 |
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Enthalten in Building simulation 11(2018), 6 vom: 03. Mai, Seite 1067-1081 volume:11 year:2018 number:6 day:03 month:05 pages:1067-1081 |
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Enthalten in Building simulation 11(2018), 6 vom: 03. Mai, Seite 1067-1081 volume:11 year:2018 number:6 day:03 month:05 pages:1067-1081 |
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Salo, Juha @@aut@@ Huttunen, Petteri @@aut@@ Vinha, Juha @@aut@@ Keskikuru, Timo @@aut@@ |
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Purpose of the depressurization is to prevent the intrusion of radon or other insanitary particles into indoor air. However, in typical foundation structures the depressurization will cause airflow from soil into the crawl space air and it may convey excessive moisture making the hygrothermal conditions potential for mould growth or other moisture-induced biological damage, which is not considered to be acceptable even with the depressurization. Although in general the forced convection of humidity from soil presumably increases relative humidity in crawl space, significant heat capacity of the ground may warm the air flowing into the crawl space and thus decrease the relative humidity. Overall effect of the depressurization on the conditions in crawl space is therefore not trivial. Because a full-scale three-dimensional finite element analysis of heat, mass and momentum transfer in crawl space and its surroundings would require excessive computational resources, several simplifications were necessary to apply in the model. According to the numerical results, the airflow through drainage layer into crawl space does not seem to have severe effect on the crawl space conditions. 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Salo, Juha |
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numerical study of time-dependent hygrothermal conditions in depressurized crawl space |
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Numerical study of time-dependent hygrothermal conditions in depressurized crawl space |
| abstract |
Abstract A finite element based hygrothermal model consisting of several interconnected components with varying number of spatial dimensions was applied to analyze the time-dependent temperature and humidity conditions of a mechanically depressurized and ventilated crawl space. Purpose of the depressurization is to prevent the intrusion of radon or other insanitary particles into indoor air. However, in typical foundation structures the depressurization will cause airflow from soil into the crawl space air and it may convey excessive moisture making the hygrothermal conditions potential for mould growth or other moisture-induced biological damage, which is not considered to be acceptable even with the depressurization. Although in general the forced convection of humidity from soil presumably increases relative humidity in crawl space, significant heat capacity of the ground may warm the air flowing into the crawl space and thus decrease the relative humidity. Overall effect of the depressurization on the conditions in crawl space is therefore not trivial. Because a full-scale three-dimensional finite element analysis of heat, mass and momentum transfer in crawl space and its surroundings would require excessive computational resources, several simplifications were necessary to apply in the model. According to the numerical results, the airflow through drainage layer into crawl space does not seem to have severe effect on the crawl space conditions. Conversely, in cold periods the relative humidity in crawl space is very low because of the air temperature is increased while flowing through the drainage layer. © Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018 |
| abstractGer |
Abstract A finite element based hygrothermal model consisting of several interconnected components with varying number of spatial dimensions was applied to analyze the time-dependent temperature and humidity conditions of a mechanically depressurized and ventilated crawl space. Purpose of the depressurization is to prevent the intrusion of radon or other insanitary particles into indoor air. However, in typical foundation structures the depressurization will cause airflow from soil into the crawl space air and it may convey excessive moisture making the hygrothermal conditions potential for mould growth or other moisture-induced biological damage, which is not considered to be acceptable even with the depressurization. Although in general the forced convection of humidity from soil presumably increases relative humidity in crawl space, significant heat capacity of the ground may warm the air flowing into the crawl space and thus decrease the relative humidity. Overall effect of the depressurization on the conditions in crawl space is therefore not trivial. Because a full-scale three-dimensional finite element analysis of heat, mass and momentum transfer in crawl space and its surroundings would require excessive computational resources, several simplifications were necessary to apply in the model. According to the numerical results, the airflow through drainage layer into crawl space does not seem to have severe effect on the crawl space conditions. Conversely, in cold periods the relative humidity in crawl space is very low because of the air temperature is increased while flowing through the drainage layer. © Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018 |
| abstract_unstemmed |
Abstract A finite element based hygrothermal model consisting of several interconnected components with varying number of spatial dimensions was applied to analyze the time-dependent temperature and humidity conditions of a mechanically depressurized and ventilated crawl space. Purpose of the depressurization is to prevent the intrusion of radon or other insanitary particles into indoor air. However, in typical foundation structures the depressurization will cause airflow from soil into the crawl space air and it may convey excessive moisture making the hygrothermal conditions potential for mould growth or other moisture-induced biological damage, which is not considered to be acceptable even with the depressurization. Although in general the forced convection of humidity from soil presumably increases relative humidity in crawl space, significant heat capacity of the ground may warm the air flowing into the crawl space and thus decrease the relative humidity. Overall effect of the depressurization on the conditions in crawl space is therefore not trivial. Because a full-scale three-dimensional finite element analysis of heat, mass and momentum transfer in crawl space and its surroundings would require excessive computational resources, several simplifications were necessary to apply in the model. According to the numerical results, the airflow through drainage layer into crawl space does not seem to have severe effect on the crawl space conditions. Conversely, in cold periods the relative humidity in crawl space is very low because of the air temperature is increased while flowing through the drainage layer. © Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018 |
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Numerical study of time-dependent hygrothermal conditions in depressurized crawl space |
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Huttunen, Petteri Vinha, Juha Keskikuru, Timo |
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10.1007/s12273-018-0447-7 |
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| score |
7.397565 |