Urban scale rooftop super cool broadband radiative coolers in humid conditions
Abstract The presence of water molecules in the air can impact how super cool broadband radiative coolers behave. Higher humidity in the lower atmosphere traps infrared radiation, reducing heat sent back to outer space. In this study, a mesoscale urban climate model is used to evaluate the newly dev...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Khatun, Rupali [verfasserIn] Das, Debashish [verfasserIn] Khorat, Samiran [verfasserIn] Aziz, Sk Mohammad [verfasserIn] Anand, Prashant [verfasserIn] Mohan, Manju [verfasserIn] Khan, Ansar [verfasserIn] Niyogi, Dev [verfasserIn] Santamouris, Mattheos [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2024 |
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| Schlagwörter: |
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| Anmerkung: |
© Tsinghua University Press 2024 |
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| Übergeordnetes Werk: |
Enthalten in: Building simulation - Tsinghua University Press, 2008, 17(2024), 9 vom: 10. Juli, Seite 1629-1651 |
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| Übergeordnetes Werk: |
volume:17 ; year:2024 ; number:9 ; day:10 ; month:07 ; pages:1629-1651 |
| Links: |
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| DOI / URN: |
10.1007/s12273-024-1150-5 |
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| Katalog-ID: |
SPR057353832 |
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| 520 | |a Abstract The presence of water molecules in the air can impact how super cool broadband radiative coolers behave. Higher humidity in the lower atmosphere traps infrared radiation, reducing heat sent back to outer space. In this study, a mesoscale urban climate model is used to evaluate the newly developed super cool materials with broadband emissivity not selective in atmospheric window as an arsenal for urban heat management of tropical wet and dry cities like Kolkata. The results suggest that the energy balance over urban domain has substantially been altered by the city scale deployment of super cool broadband radiative cooling materials on the building rooftop. Bowen ratio and evaporative fraction values were found decreasing and increasing, respectively with a positive directional polynomial (R2 = 0.968) relationship, after the implementation of super cool broadband radiative cooling materials and in comparison, to the unmitigated scenario. At high solar hour (14:00 LT), additional thermal variables of urban domain such as 2 m air temperature, surface skin temperature, urban canopy temperature, and roof surface temperature decrease by 2.3 °C, 5.4 °C, 0.8 °C, and 31.7 °C, respectively. Reflective super cool broadband materials achieve sub-ambient temperatures up to 11.7 °C during peak hours, reduce surface wind speed by 2.5 m $ s^{−1} $, and lower the planetary boundary layer by 1475 m. The average daytime drop is approximately 7.3 °C, and at night, it is close to 2.4 °C. Deployment induces a “regional high” over urban areas, disrupting sea breeze onset and lowering the planetary boundary layer. Finally, an optimal cooling performance for super cool broadband radiative coolers can be achieved in lower humidity conditions, as their efficiency decreases with increased humidity. Though needing further investigation, these findings of nano-science-based super cool broadband materials offer valuable insights for policymakers and urban planners addressing thermal management in densely packed tropical urban environments. | ||
| 650 | 4 | |a tropical urban climate |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a extreme urban heat |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a urban heat mitigation |7 (dpeaa)DE-He213 | |
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| 700 | 1 | |a Das, Debashish |e verfasserin |4 aut | |
| 700 | 1 | |a Khorat, Samiran |e verfasserin |4 aut | |
| 700 | 1 | |a Aziz, Sk Mohammad |e verfasserin |4 aut | |
| 700 | 1 | |a Anand, Prashant |e verfasserin |4 aut | |
| 700 | 1 | |a Mohan, Manju |e verfasserin |4 aut | |
| 700 | 1 | |a Khan, Ansar |e verfasserin |4 aut | |
| 700 | 1 | |a Niyogi, Dev |e verfasserin |4 aut | |
| 700 | 1 | |a Santamouris, Mattheos |e verfasserin |4 aut | |
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10.1007/s12273-024-1150-5 doi (DE-627)SPR057353832 (SPR)s12273-024-1150-5-e DE-627 ger DE-627 rakwb eng 620 VZ Khatun, Rupali verfasserin aut Urban scale rooftop super cool broadband radiative coolers in humid conditions 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Tsinghua University Press 2024 Abstract The presence of water molecules in the air can impact how super cool broadband radiative coolers behave. Higher humidity in the lower atmosphere traps infrared radiation, reducing heat sent back to outer space. In this study, a mesoscale urban climate model is used to evaluate the newly developed super cool materials with broadband emissivity not selective in atmospheric window as an arsenal for urban heat management of tropical wet and dry cities like Kolkata. The results suggest that the energy balance over urban domain has substantially been altered by the city scale deployment of super cool broadband radiative cooling materials on the building rooftop. Bowen ratio and evaporative fraction values were found decreasing and increasing, respectively with a positive directional polynomial (R2 = 0.968) relationship, after the implementation of super cool broadband radiative cooling materials and in comparison, to the unmitigated scenario. At high solar hour (14:00 LT), additional thermal variables of urban domain such as 2 m air temperature, surface skin temperature, urban canopy temperature, and roof surface temperature decrease by 2.3 °C, 5.4 °C, 0.8 °C, and 31.7 °C, respectively. Reflective super cool broadband materials achieve sub-ambient temperatures up to 11.7 °C during peak hours, reduce surface wind speed by 2.5 m $ s^{−1} $, and lower the planetary boundary layer by 1475 m. The average daytime drop is approximately 7.3 °C, and at night, it is close to 2.4 °C. Deployment induces a “regional high” over urban areas, disrupting sea breeze onset and lowering the planetary boundary layer. Finally, an optimal cooling performance for super cool broadband radiative coolers can be achieved in lower humidity conditions, as their efficiency decreases with increased humidity. Though needing further investigation, these findings of nano-science-based super cool broadband materials offer valuable insights for policymakers and urban planners addressing thermal management in densely packed tropical urban environments. tropical urban climate (dpeaa)DE-He213 extreme urban heat (dpeaa)DE-He213 urban heat mitigation (dpeaa)DE-He213 radiative cooler (dpeaa)DE-He213 WRF-urban model (dpeaa)DE-He213 Das, Debashish verfasserin aut Khorat, Samiran verfasserin aut Aziz, Sk Mohammad verfasserin aut Anand, Prashant verfasserin aut Mohan, Manju verfasserin aut Khan, Ansar verfasserin aut Niyogi, Dev verfasserin aut Santamouris, Mattheos verfasserin aut Enthalten in Building simulation Tsinghua University Press, 2008 17(2024), 9 vom: 10. Juli, Seite 1629-1651 (DE-627)564750867 (DE-600)2422327-X 1996-8744 nnns volume:17 year:2024 number:9 day:10 month:07 pages:1629-1651 https://dx.doi.org/10.1007/s12273-024-1150-5 X:SPRINGER Resolving-System lizenzpflichtig Volltext SYSFLAG_0 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_152 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_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_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 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_2118 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_4126 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_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 17 2024 9 10 07 1629-1651 |
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10.1007/s12273-024-1150-5 doi (DE-627)SPR057353832 (SPR)s12273-024-1150-5-e DE-627 ger DE-627 rakwb eng 620 VZ Khatun, Rupali verfasserin aut Urban scale rooftop super cool broadband radiative coolers in humid conditions 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Tsinghua University Press 2024 Abstract The presence of water molecules in the air can impact how super cool broadband radiative coolers behave. Higher humidity in the lower atmosphere traps infrared radiation, reducing heat sent back to outer space. In this study, a mesoscale urban climate model is used to evaluate the newly developed super cool materials with broadband emissivity not selective in atmospheric window as an arsenal for urban heat management of tropical wet and dry cities like Kolkata. The results suggest that the energy balance over urban domain has substantially been altered by the city scale deployment of super cool broadband radiative cooling materials on the building rooftop. Bowen ratio and evaporative fraction values were found decreasing and increasing, respectively with a positive directional polynomial (R2 = 0.968) relationship, after the implementation of super cool broadband radiative cooling materials and in comparison, to the unmitigated scenario. At high solar hour (14:00 LT), additional thermal variables of urban domain such as 2 m air temperature, surface skin temperature, urban canopy temperature, and roof surface temperature decrease by 2.3 °C, 5.4 °C, 0.8 °C, and 31.7 °C, respectively. Reflective super cool broadband materials achieve sub-ambient temperatures up to 11.7 °C during peak hours, reduce surface wind speed by 2.5 m $ s^{−1} $, and lower the planetary boundary layer by 1475 m. The average daytime drop is approximately 7.3 °C, and at night, it is close to 2.4 °C. Deployment induces a “regional high” over urban areas, disrupting sea breeze onset and lowering the planetary boundary layer. Finally, an optimal cooling performance for super cool broadband radiative coolers can be achieved in lower humidity conditions, as their efficiency decreases with increased humidity. Though needing further investigation, these findings of nano-science-based super cool broadband materials offer valuable insights for policymakers and urban planners addressing thermal management in densely packed tropical urban environments. tropical urban climate (dpeaa)DE-He213 extreme urban heat (dpeaa)DE-He213 urban heat mitigation (dpeaa)DE-He213 radiative cooler (dpeaa)DE-He213 WRF-urban model (dpeaa)DE-He213 Das, Debashish verfasserin aut Khorat, Samiran verfasserin aut Aziz, Sk Mohammad verfasserin aut Anand, Prashant verfasserin aut Mohan, Manju verfasserin aut Khan, Ansar verfasserin aut Niyogi, Dev verfasserin aut Santamouris, Mattheos verfasserin aut Enthalten in Building simulation Tsinghua University Press, 2008 17(2024), 9 vom: 10. Juli, Seite 1629-1651 (DE-627)564750867 (DE-600)2422327-X 1996-8744 nnns volume:17 year:2024 number:9 day:10 month:07 pages:1629-1651 https://dx.doi.org/10.1007/s12273-024-1150-5 X:SPRINGER Resolving-System lizenzpflichtig Volltext SYSFLAG_0 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_152 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_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_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 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_2118 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_4126 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_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 17 2024 9 10 07 1629-1651 |
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10.1007/s12273-024-1150-5 doi (DE-627)SPR057353832 (SPR)s12273-024-1150-5-e DE-627 ger DE-627 rakwb eng 620 VZ Khatun, Rupali verfasserin aut Urban scale rooftop super cool broadband radiative coolers in humid conditions 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Tsinghua University Press 2024 Abstract The presence of water molecules in the air can impact how super cool broadband radiative coolers behave. Higher humidity in the lower atmosphere traps infrared radiation, reducing heat sent back to outer space. In this study, a mesoscale urban climate model is used to evaluate the newly developed super cool materials with broadband emissivity not selective in atmospheric window as an arsenal for urban heat management of tropical wet and dry cities like Kolkata. The results suggest that the energy balance over urban domain has substantially been altered by the city scale deployment of super cool broadband radiative cooling materials on the building rooftop. Bowen ratio and evaporative fraction values were found decreasing and increasing, respectively with a positive directional polynomial (R2 = 0.968) relationship, after the implementation of super cool broadband radiative cooling materials and in comparison, to the unmitigated scenario. At high solar hour (14:00 LT), additional thermal variables of urban domain such as 2 m air temperature, surface skin temperature, urban canopy temperature, and roof surface temperature decrease by 2.3 °C, 5.4 °C, 0.8 °C, and 31.7 °C, respectively. Reflective super cool broadband materials achieve sub-ambient temperatures up to 11.7 °C during peak hours, reduce surface wind speed by 2.5 m $ s^{−1} $, and lower the planetary boundary layer by 1475 m. The average daytime drop is approximately 7.3 °C, and at night, it is close to 2.4 °C. Deployment induces a “regional high” over urban areas, disrupting sea breeze onset and lowering the planetary boundary layer. Finally, an optimal cooling performance for super cool broadband radiative coolers can be achieved in lower humidity conditions, as their efficiency decreases with increased humidity. Though needing further investigation, these findings of nano-science-based super cool broadband materials offer valuable insights for policymakers and urban planners addressing thermal management in densely packed tropical urban environments. tropical urban climate (dpeaa)DE-He213 extreme urban heat (dpeaa)DE-He213 urban heat mitigation (dpeaa)DE-He213 radiative cooler (dpeaa)DE-He213 WRF-urban model (dpeaa)DE-He213 Das, Debashish verfasserin aut Khorat, Samiran verfasserin aut Aziz, Sk Mohammad verfasserin aut Anand, Prashant verfasserin aut Mohan, Manju verfasserin aut Khan, Ansar verfasserin aut Niyogi, Dev verfasserin aut Santamouris, Mattheos verfasserin aut Enthalten in Building simulation Tsinghua University Press, 2008 17(2024), 9 vom: 10. Juli, Seite 1629-1651 (DE-627)564750867 (DE-600)2422327-X 1996-8744 nnns volume:17 year:2024 number:9 day:10 month:07 pages:1629-1651 https://dx.doi.org/10.1007/s12273-024-1150-5 X:SPRINGER Resolving-System lizenzpflichtig Volltext SYSFLAG_0 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_152 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_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_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 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_2118 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_4126 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_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 17 2024 9 10 07 1629-1651 |
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10.1007/s12273-024-1150-5 doi (DE-627)SPR057353832 (SPR)s12273-024-1150-5-e DE-627 ger DE-627 rakwb eng 620 VZ Khatun, Rupali verfasserin aut Urban scale rooftop super cool broadband radiative coolers in humid conditions 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Tsinghua University Press 2024 Abstract The presence of water molecules in the air can impact how super cool broadband radiative coolers behave. Higher humidity in the lower atmosphere traps infrared radiation, reducing heat sent back to outer space. In this study, a mesoscale urban climate model is used to evaluate the newly developed super cool materials with broadband emissivity not selective in atmospheric window as an arsenal for urban heat management of tropical wet and dry cities like Kolkata. The results suggest that the energy balance over urban domain has substantially been altered by the city scale deployment of super cool broadband radiative cooling materials on the building rooftop. Bowen ratio and evaporative fraction values were found decreasing and increasing, respectively with a positive directional polynomial (R2 = 0.968) relationship, after the implementation of super cool broadband radiative cooling materials and in comparison, to the unmitigated scenario. At high solar hour (14:00 LT), additional thermal variables of urban domain such as 2 m air temperature, surface skin temperature, urban canopy temperature, and roof surface temperature decrease by 2.3 °C, 5.4 °C, 0.8 °C, and 31.7 °C, respectively. Reflective super cool broadband materials achieve sub-ambient temperatures up to 11.7 °C during peak hours, reduce surface wind speed by 2.5 m $ s^{−1} $, and lower the planetary boundary layer by 1475 m. The average daytime drop is approximately 7.3 °C, and at night, it is close to 2.4 °C. Deployment induces a “regional high” over urban areas, disrupting sea breeze onset and lowering the planetary boundary layer. Finally, an optimal cooling performance for super cool broadband radiative coolers can be achieved in lower humidity conditions, as their efficiency decreases with increased humidity. Though needing further investigation, these findings of nano-science-based super cool broadband materials offer valuable insights for policymakers and urban planners addressing thermal management in densely packed tropical urban environments. tropical urban climate (dpeaa)DE-He213 extreme urban heat (dpeaa)DE-He213 urban heat mitigation (dpeaa)DE-He213 radiative cooler (dpeaa)DE-He213 WRF-urban model (dpeaa)DE-He213 Das, Debashish verfasserin aut Khorat, Samiran verfasserin aut Aziz, Sk Mohammad verfasserin aut Anand, Prashant verfasserin aut Mohan, Manju verfasserin aut Khan, Ansar verfasserin aut Niyogi, Dev verfasserin aut Santamouris, Mattheos verfasserin aut Enthalten in Building simulation Tsinghua University Press, 2008 17(2024), 9 vom: 10. Juli, Seite 1629-1651 (DE-627)564750867 (DE-600)2422327-X 1996-8744 nnns volume:17 year:2024 number:9 day:10 month:07 pages:1629-1651 https://dx.doi.org/10.1007/s12273-024-1150-5 X:SPRINGER Resolving-System lizenzpflichtig Volltext SYSFLAG_0 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_152 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_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_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 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_2118 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_4126 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_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 17 2024 9 10 07 1629-1651 |
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10.1007/s12273-024-1150-5 doi (DE-627)SPR057353832 (SPR)s12273-024-1150-5-e DE-627 ger DE-627 rakwb eng 620 VZ Khatun, Rupali verfasserin aut Urban scale rooftop super cool broadband radiative coolers in humid conditions 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Tsinghua University Press 2024 Abstract The presence of water molecules in the air can impact how super cool broadband radiative coolers behave. Higher humidity in the lower atmosphere traps infrared radiation, reducing heat sent back to outer space. In this study, a mesoscale urban climate model is used to evaluate the newly developed super cool materials with broadband emissivity not selective in atmospheric window as an arsenal for urban heat management of tropical wet and dry cities like Kolkata. The results suggest that the energy balance over urban domain has substantially been altered by the city scale deployment of super cool broadband radiative cooling materials on the building rooftop. Bowen ratio and evaporative fraction values were found decreasing and increasing, respectively with a positive directional polynomial (R2 = 0.968) relationship, after the implementation of super cool broadband radiative cooling materials and in comparison, to the unmitigated scenario. At high solar hour (14:00 LT), additional thermal variables of urban domain such as 2 m air temperature, surface skin temperature, urban canopy temperature, and roof surface temperature decrease by 2.3 °C, 5.4 °C, 0.8 °C, and 31.7 °C, respectively. Reflective super cool broadband materials achieve sub-ambient temperatures up to 11.7 °C during peak hours, reduce surface wind speed by 2.5 m $ s^{−1} $, and lower the planetary boundary layer by 1475 m. The average daytime drop is approximately 7.3 °C, and at night, it is close to 2.4 °C. Deployment induces a “regional high” over urban areas, disrupting sea breeze onset and lowering the planetary boundary layer. Finally, an optimal cooling performance for super cool broadband radiative coolers can be achieved in lower humidity conditions, as their efficiency decreases with increased humidity. Though needing further investigation, these findings of nano-science-based super cool broadband materials offer valuable insights for policymakers and urban planners addressing thermal management in densely packed tropical urban environments. tropical urban climate (dpeaa)DE-He213 extreme urban heat (dpeaa)DE-He213 urban heat mitigation (dpeaa)DE-He213 radiative cooler (dpeaa)DE-He213 WRF-urban model (dpeaa)DE-He213 Das, Debashish verfasserin aut Khorat, Samiran verfasserin aut Aziz, Sk Mohammad verfasserin aut Anand, Prashant verfasserin aut Mohan, Manju verfasserin aut Khan, Ansar verfasserin aut Niyogi, Dev verfasserin aut Santamouris, Mattheos verfasserin aut Enthalten in Building simulation Tsinghua University Press, 2008 17(2024), 9 vom: 10. Juli, Seite 1629-1651 (DE-627)564750867 (DE-600)2422327-X 1996-8744 nnns volume:17 year:2024 number:9 day:10 month:07 pages:1629-1651 https://dx.doi.org/10.1007/s12273-024-1150-5 X:SPRINGER Resolving-System lizenzpflichtig Volltext SYSFLAG_0 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_152 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_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_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 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_2118 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_4126 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_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 17 2024 9 10 07 1629-1651 |
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Enthalten in Building simulation 17(2024), 9 vom: 10. Juli, Seite 1629-1651 volume:17 year:2024 number:9 day:10 month:07 pages:1629-1651 |
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Khatun, Rupali @@aut@@ Das, Debashish @@aut@@ Khorat, Samiran @@aut@@ Aziz, Sk Mohammad @@aut@@ Anand, Prashant @@aut@@ Mohan, Manju @@aut@@ Khan, Ansar @@aut@@ Niyogi, Dev @@aut@@ Santamouris, Mattheos @@aut@@ |
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Higher humidity in the lower atmosphere traps infrared radiation, reducing heat sent back to outer space. In this study, a mesoscale urban climate model is used to evaluate the newly developed super cool materials with broadband emissivity not selective in atmospheric window as an arsenal for urban heat management of tropical wet and dry cities like Kolkata. The results suggest that the energy balance over urban domain has substantially been altered by the city scale deployment of super cool broadband radiative cooling materials on the building rooftop. Bowen ratio and evaporative fraction values were found decreasing and increasing, respectively with a positive directional polynomial (R2 = 0.968) relationship, after the implementation of super cool broadband radiative cooling materials and in comparison, to the unmitigated scenario. At high solar hour (14:00 LT), additional thermal variables of urban domain such as 2 m air temperature, surface skin temperature, urban canopy temperature, and roof surface temperature decrease by 2.3 °C, 5.4 °C, 0.8 °C, and 31.7 °C, respectively. Reflective super cool broadband materials achieve sub-ambient temperatures up to 11.7 °C during peak hours, reduce surface wind speed by 2.5 m $ s^{−1} $, and lower the planetary boundary layer by 1475 m. The average daytime drop is approximately 7.3 °C, and at night, it is close to 2.4 °C. Deployment induces a “regional high” over urban areas, disrupting sea breeze onset and lowering the planetary boundary layer. Finally, an optimal cooling performance for super cool broadband radiative coolers can be achieved in lower humidity conditions, as their efficiency decreases with increased humidity. 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Khatun, Rupali |
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Khatun, Rupali ddc 620 misc tropical urban climate misc extreme urban heat misc urban heat mitigation misc radiative cooler misc WRF-urban model Urban scale rooftop super cool broadband radiative coolers in humid conditions |
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620 VZ Urban scale rooftop super cool broadband radiative coolers in humid conditions tropical urban climate (dpeaa)DE-He213 extreme urban heat (dpeaa)DE-He213 urban heat mitigation (dpeaa)DE-He213 radiative cooler (dpeaa)DE-He213 WRF-urban model (dpeaa)DE-He213 |
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Khatun, Rupali Das, Debashish Khorat, Samiran Aziz, Sk Mohammad Anand, Prashant Mohan, Manju Khan, Ansar Niyogi, Dev Santamouris, Mattheos |
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urban scale rooftop super cool broadband radiative coolers in humid conditions |
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Urban scale rooftop super cool broadband radiative coolers in humid conditions |
| abstract |
Abstract The presence of water molecules in the air can impact how super cool broadband radiative coolers behave. Higher humidity in the lower atmosphere traps infrared radiation, reducing heat sent back to outer space. In this study, a mesoscale urban climate model is used to evaluate the newly developed super cool materials with broadband emissivity not selective in atmospheric window as an arsenal for urban heat management of tropical wet and dry cities like Kolkata. The results suggest that the energy balance over urban domain has substantially been altered by the city scale deployment of super cool broadband radiative cooling materials on the building rooftop. Bowen ratio and evaporative fraction values were found decreasing and increasing, respectively with a positive directional polynomial (R2 = 0.968) relationship, after the implementation of super cool broadband radiative cooling materials and in comparison, to the unmitigated scenario. At high solar hour (14:00 LT), additional thermal variables of urban domain such as 2 m air temperature, surface skin temperature, urban canopy temperature, and roof surface temperature decrease by 2.3 °C, 5.4 °C, 0.8 °C, and 31.7 °C, respectively. Reflective super cool broadband materials achieve sub-ambient temperatures up to 11.7 °C during peak hours, reduce surface wind speed by 2.5 m $ s^{−1} $, and lower the planetary boundary layer by 1475 m. The average daytime drop is approximately 7.3 °C, and at night, it is close to 2.4 °C. Deployment induces a “regional high” over urban areas, disrupting sea breeze onset and lowering the planetary boundary layer. Finally, an optimal cooling performance for super cool broadband radiative coolers can be achieved in lower humidity conditions, as their efficiency decreases with increased humidity. Though needing further investigation, these findings of nano-science-based super cool broadband materials offer valuable insights for policymakers and urban planners addressing thermal management in densely packed tropical urban environments. © Tsinghua University Press 2024 |
| abstractGer |
Abstract The presence of water molecules in the air can impact how super cool broadband radiative coolers behave. Higher humidity in the lower atmosphere traps infrared radiation, reducing heat sent back to outer space. In this study, a mesoscale urban climate model is used to evaluate the newly developed super cool materials with broadband emissivity not selective in atmospheric window as an arsenal for urban heat management of tropical wet and dry cities like Kolkata. The results suggest that the energy balance over urban domain has substantially been altered by the city scale deployment of super cool broadband radiative cooling materials on the building rooftop. Bowen ratio and evaporative fraction values were found decreasing and increasing, respectively with a positive directional polynomial (R2 = 0.968) relationship, after the implementation of super cool broadband radiative cooling materials and in comparison, to the unmitigated scenario. At high solar hour (14:00 LT), additional thermal variables of urban domain such as 2 m air temperature, surface skin temperature, urban canopy temperature, and roof surface temperature decrease by 2.3 °C, 5.4 °C, 0.8 °C, and 31.7 °C, respectively. Reflective super cool broadband materials achieve sub-ambient temperatures up to 11.7 °C during peak hours, reduce surface wind speed by 2.5 m $ s^{−1} $, and lower the planetary boundary layer by 1475 m. The average daytime drop is approximately 7.3 °C, and at night, it is close to 2.4 °C. Deployment induces a “regional high” over urban areas, disrupting sea breeze onset and lowering the planetary boundary layer. Finally, an optimal cooling performance for super cool broadband radiative coolers can be achieved in lower humidity conditions, as their efficiency decreases with increased humidity. Though needing further investigation, these findings of nano-science-based super cool broadband materials offer valuable insights for policymakers and urban planners addressing thermal management in densely packed tropical urban environments. © Tsinghua University Press 2024 |
| abstract_unstemmed |
Abstract The presence of water molecules in the air can impact how super cool broadband radiative coolers behave. Higher humidity in the lower atmosphere traps infrared radiation, reducing heat sent back to outer space. In this study, a mesoscale urban climate model is used to evaluate the newly developed super cool materials with broadband emissivity not selective in atmospheric window as an arsenal for urban heat management of tropical wet and dry cities like Kolkata. The results suggest that the energy balance over urban domain has substantially been altered by the city scale deployment of super cool broadband radiative cooling materials on the building rooftop. Bowen ratio and evaporative fraction values were found decreasing and increasing, respectively with a positive directional polynomial (R2 = 0.968) relationship, after the implementation of super cool broadband radiative cooling materials and in comparison, to the unmitigated scenario. At high solar hour (14:00 LT), additional thermal variables of urban domain such as 2 m air temperature, surface skin temperature, urban canopy temperature, and roof surface temperature decrease by 2.3 °C, 5.4 °C, 0.8 °C, and 31.7 °C, respectively. Reflective super cool broadband materials achieve sub-ambient temperatures up to 11.7 °C during peak hours, reduce surface wind speed by 2.5 m $ s^{−1} $, and lower the planetary boundary layer by 1475 m. The average daytime drop is approximately 7.3 °C, and at night, it is close to 2.4 °C. Deployment induces a “regional high” over urban areas, disrupting sea breeze onset and lowering the planetary boundary layer. Finally, an optimal cooling performance for super cool broadband radiative coolers can be achieved in lower humidity conditions, as their efficiency decreases with increased humidity. Though needing further investigation, these findings of nano-science-based super cool broadband materials offer valuable insights for policymakers and urban planners addressing thermal management in densely packed tropical urban environments. © Tsinghua University Press 2024 |
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9 |
| title_short |
Urban scale rooftop super cool broadband radiative coolers in humid conditions |
| url |
https://dx.doi.org/10.1007/s12273-024-1150-5 |
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| author2 |
Das, Debashish Khorat, Samiran Aziz, Sk Mohammad Anand, Prashant Mohan, Manju Khan, Ansar Niyogi, Dev Santamouris, Mattheos |
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Das, Debashish Khorat, Samiran Aziz, Sk Mohammad Anand, Prashant Mohan, Manju Khan, Ansar Niyogi, Dev Santamouris, Mattheos |
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| doi_str |
10.1007/s12273-024-1150-5 |
| up_date |
2024-09-18T04:48:38.031Z |
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| score |
7.4003124 |