Performance analysis of a hybrid non-centralized radiant floor cooling system in hot and humid regions

Radiant floor cooling (RFC) systems are known for their energy efficiency and comfort. However, when a conventional intermittently operating RFC system is subjected to sudden increases in heat and moisture loads, condensation, difficulties with multi-zone temperature control, inadequate cooling capa...

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Autores principales:	Xiaosong Gu, Mingliang Cheng, Xiaofeng Zhang, Zixin Qi, Jiang Liu, Zhenfeng Li
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Radiant floor cooling Fan coil Thermal comfort Floor cooling capacity Outdoor air dehumidifier Hot and humid regions Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/672b0abc5e7b4b559be4121eeff6aac8
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id	oai:doaj.org-article:672b0abc5e7b4b559be4121eeff6aac8
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spelling	oai:doaj.org-article:672b0abc5e7b4b559be4121eeff6aac82021-11-16T04:10:41ZPerformance analysis of a hybrid non-centralized radiant floor cooling system in hot and humid regions2214-157X10.1016/j.csite.2021.101645https://doaj.org/article/672b0abc5e7b4b559be4121eeff6aac82021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2214157X2100808Xhttps://doaj.org/toc/2214-157XRadiant floor cooling (RFC) systems are known for their energy efficiency and comfort. However, when a conventional intermittently operating RFC system is subjected to sudden increases in heat and moisture loads, condensation, difficulties with multi-zone temperature control, inadequate cooling capacity, thermal comfort degradation, and slow thermal response may occur. A non-centralized hybrid RFC system was established with an air source heat pump, floor coils of high thermal mass, fan coils, and an outdoor air dehumidifier. The thermal comfort and cooling capacity of a given thermal zone under four modes were tested and analyzed. The results showed that the system created a satisfactory indoor environment with multi-zone control. The precooling direct-expansion (DX) outdoor air dehumidifier combined with the fan coils served the role of a conventional dispersed DOAS (dedicated outdoor air system), improved the response of the radiant system, and assisted in dehumidification. A PID-based mixing valve allows the floor surface temperature to track the dew point temperature of the zone air to improve floor cooling capacity. This hybrid system is suitable for residential homes or offices with non-centralized air conditioning systems to handle transient heat and moisture load variations.Xiaosong GuMingliang ChengXiaofeng ZhangZixin QiJiang LiuZhenfeng LiElsevierarticleRadiant floor coolingFan coilThermal comfortFloor cooling capacityOutdoor air dehumidifierHot and humid regionsEngineering (General). Civil engineering (General)TA1-2040ENCase Studies in Thermal Engineering, Vol 28, Iss , Pp 101645- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Radiant floor cooling Fan coil Thermal comfort Floor cooling capacity Outdoor air dehumidifier Hot and humid regions Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Radiant floor cooling Fan coil Thermal comfort Floor cooling capacity Outdoor air dehumidifier Hot and humid regions Engineering (General). Civil engineering (General) TA1-2040 Xiaosong Gu Mingliang Cheng Xiaofeng Zhang Zixin Qi Jiang Liu Zhenfeng Li Performance analysis of a hybrid non-centralized radiant floor cooling system in hot and humid regions
description	Radiant floor cooling (RFC) systems are known for their energy efficiency and comfort. However, when a conventional intermittently operating RFC system is subjected to sudden increases in heat and moisture loads, condensation, difficulties with multi-zone temperature control, inadequate cooling capacity, thermal comfort degradation, and slow thermal response may occur. A non-centralized hybrid RFC system was established with an air source heat pump, floor coils of high thermal mass, fan coils, and an outdoor air dehumidifier. The thermal comfort and cooling capacity of a given thermal zone under four modes were tested and analyzed. The results showed that the system created a satisfactory indoor environment with multi-zone control. The precooling direct-expansion (DX) outdoor air dehumidifier combined with the fan coils served the role of a conventional dispersed DOAS (dedicated outdoor air system), improved the response of the radiant system, and assisted in dehumidification. A PID-based mixing valve allows the floor surface temperature to track the dew point temperature of the zone air to improve floor cooling capacity. This hybrid system is suitable for residential homes or offices with non-centralized air conditioning systems to handle transient heat and moisture load variations.
format	article
author	Xiaosong Gu Mingliang Cheng Xiaofeng Zhang Zixin Qi Jiang Liu Zhenfeng Li
author_facet	Xiaosong Gu Mingliang Cheng Xiaofeng Zhang Zixin Qi Jiang Liu Zhenfeng Li
author_sort	Xiaosong Gu
title	Performance analysis of a hybrid non-centralized radiant floor cooling system in hot and humid regions
title_short	Performance analysis of a hybrid non-centralized radiant floor cooling system in hot and humid regions
title_full	Performance analysis of a hybrid non-centralized radiant floor cooling system in hot and humid regions
title_fullStr	Performance analysis of a hybrid non-centralized radiant floor cooling system in hot and humid regions
title_full_unstemmed	Performance analysis of a hybrid non-centralized radiant floor cooling system in hot and humid regions
title_sort	performance analysis of a hybrid non-centralized radiant floor cooling system in hot and humid regions
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/672b0abc5e7b4b559be4121eeff6aac8
work_keys_str_mv	AT xiaosonggu performanceanalysisofahybridnoncentralizedradiantfloorcoolingsysteminhotandhumidregions AT mingliangcheng performanceanalysisofahybridnoncentralizedradiantfloorcoolingsysteminhotandhumidregions AT xiaofengzhang performanceanalysisofahybridnoncentralizedradiantfloorcoolingsysteminhotandhumidregions AT zixinqi performanceanalysisofahybridnoncentralizedradiantfloorcoolingsysteminhotandhumidregions AT jiangliu performanceanalysisofahybridnoncentralizedradiantfloorcoolingsysteminhotandhumidregions AT zhenfengli performanceanalysisofahybridnoncentralizedradiantfloorcoolingsysteminhotandhumidregions
_version_	1718426727929085952

Performance analysis of a hybrid non-centralized radiant floor cooling system in hot and humid regions

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