Thermal Comfort and Energy Analysis of a Hybrid Cooling System by Coupling Natural Ventilation with Radiant and Indirect Evaporative Cooling

A hybrid cooling system which combines natural ventilation with a radiant cooling system for a hot and humid climate was studied. Indirect evaporative cooling was used to produce chilled water at temperatures slightly higher than the dew point. With this hybrid system, the condensation issue on the...

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Autores principales:	Pradeep Shakya, Gimson Ng, Xiaoli Zhou, Yew Wah Wong, Swapnil Dubey, Shunzhi Qian
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	natural ventilation radiant cooling indirect evaporative cooling (IEC) sustainable building energy saving thermal comfort Technology T
Acceso en línea:	https://doaj.org/article/5ec05019adfa4a80856513a9a15007d2
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spelling	oai:doaj.org-article:5ec05019adfa4a80856513a9a15007d22021-11-25T17:29:03ZThermal Comfort and Energy Analysis of a Hybrid Cooling System by Coupling Natural Ventilation with Radiant and Indirect Evaporative Cooling10.3390/en142278251996-1073https://doaj.org/article/5ec05019adfa4a80856513a9a15007d22021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/22/7825https://doaj.org/toc/1996-1073A hybrid cooling system which combines natural ventilation with a radiant cooling system for a hot and humid climate was studied. Indirect evaporative cooling was used to produce chilled water at temperatures slightly higher than the dew point. With this hybrid system, the condensation issue on the panel surface of a chilled ceiling was overcome. A computational fluid dynamics (CFD) model was employed to determine the cooling load and the parameters required for thermal comfort analysis for this hybrid system in an office-sized, well-insulated test room. Upon closer investigation, it was found that the thermal comfort by the hybrid system was acceptable only in limited outdoor conditions. Therefore, the hybrid system with a secondary fresh air supply system was suggested. Furthermore, the energy consumptions of conventional all-air, radiant cooling, and hybrid systems including the secondary air supply system were compared under similar thermal comfort conditions. The predicted results indicated that the hybrid system saves up to 77% and 61% of primary energy when compared with all-air and radiant cooling systems, respectively, while maintaining similar thermal comfort.Pradeep ShakyaGimson NgXiaoli ZhouYew Wah WongSwapnil DubeyShunzhi QianMDPI AGarticlenatural ventilationradiant coolingindirect evaporative cooling (IEC)sustainable buildingenergy savingthermal comfortTechnologyTENEnergies, Vol 14, Iss 7825, p 7825 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	natural ventilation radiant cooling indirect evaporative cooling (IEC) sustainable building energy saving thermal comfort Technology T
spellingShingle	natural ventilation radiant cooling indirect evaporative cooling (IEC) sustainable building energy saving thermal comfort Technology T Pradeep Shakya Gimson Ng Xiaoli Zhou Yew Wah Wong Swapnil Dubey Shunzhi Qian Thermal Comfort and Energy Analysis of a Hybrid Cooling System by Coupling Natural Ventilation with Radiant and Indirect Evaporative Cooling
description	A hybrid cooling system which combines natural ventilation with a radiant cooling system for a hot and humid climate was studied. Indirect evaporative cooling was used to produce chilled water at temperatures slightly higher than the dew point. With this hybrid system, the condensation issue on the panel surface of a chilled ceiling was overcome. A computational fluid dynamics (CFD) model was employed to determine the cooling load and the parameters required for thermal comfort analysis for this hybrid system in an office-sized, well-insulated test room. Upon closer investigation, it was found that the thermal comfort by the hybrid system was acceptable only in limited outdoor conditions. Therefore, the hybrid system with a secondary fresh air supply system was suggested. Furthermore, the energy consumptions of conventional all-air, radiant cooling, and hybrid systems including the secondary air supply system were compared under similar thermal comfort conditions. The predicted results indicated that the hybrid system saves up to 77% and 61% of primary energy when compared with all-air and radiant cooling systems, respectively, while maintaining similar thermal comfort.
format	article
author	Pradeep Shakya Gimson Ng Xiaoli Zhou Yew Wah Wong Swapnil Dubey Shunzhi Qian
author_facet	Pradeep Shakya Gimson Ng Xiaoli Zhou Yew Wah Wong Swapnil Dubey Shunzhi Qian
author_sort	Pradeep Shakya
title	Thermal Comfort and Energy Analysis of a Hybrid Cooling System by Coupling Natural Ventilation with Radiant and Indirect Evaporative Cooling
title_short	Thermal Comfort and Energy Analysis of a Hybrid Cooling System by Coupling Natural Ventilation with Radiant and Indirect Evaporative Cooling
title_full	Thermal Comfort and Energy Analysis of a Hybrid Cooling System by Coupling Natural Ventilation with Radiant and Indirect Evaporative Cooling
title_fullStr	Thermal Comfort and Energy Analysis of a Hybrid Cooling System by Coupling Natural Ventilation with Radiant and Indirect Evaporative Cooling
title_full_unstemmed	Thermal Comfort and Energy Analysis of a Hybrid Cooling System by Coupling Natural Ventilation with Radiant and Indirect Evaporative Cooling
title_sort	thermal comfort and energy analysis of a hybrid cooling system by coupling natural ventilation with radiant and indirect evaporative cooling
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5ec05019adfa4a80856513a9a15007d2
work_keys_str_mv	AT pradeepshakya thermalcomfortandenergyanalysisofahybridcoolingsystembycouplingnaturalventilationwithradiantandindirectevaporativecooling AT gimsonng thermalcomfortandenergyanalysisofahybridcoolingsystembycouplingnaturalventilationwithradiantandindirectevaporativecooling AT xiaolizhou thermalcomfortandenergyanalysisofahybridcoolingsystembycouplingnaturalventilationwithradiantandindirectevaporativecooling AT yewwahwong thermalcomfortandenergyanalysisofahybridcoolingsystembycouplingnaturalventilationwithradiantandindirectevaporativecooling AT swapnildubey thermalcomfortandenergyanalysisofahybridcoolingsystembycouplingnaturalventilationwithradiantandindirectevaporativecooling AT shunzhiqian thermalcomfortandenergyanalysisofahybridcoolingsystembycouplingnaturalventilationwithradiantandindirectevaporativecooling
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Thermal Comfort and Energy Analysis of a Hybrid Cooling System by Coupling Natural Ventilation with Radiant and Indirect Evaporative Cooling

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