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Impact of indoor heat load and natural ventilation on thermal comfort of radiant cooling system:An experimental study

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Energy and Built Environment 2023年第5期4卷 543-556页

作者： K Dharmasastha D.G.Leo Samuel S.M.Shiva Nagendr M.P.Maiya Department of Mechanical Engineering Indian Institute of Technology MadrasChennaiTamil Nadu 600036India barghest building performance pte.ltd. 118535Singapore Department of Civil Engineering Indian Institute of Technology MadrasRefrigeration and Air ConditioningChennai 600036India Department of building Enivironment and Energy Engineering The Hong Kong Polytechnic UniversityHong Kong

Construction and operation of buildings are responsible for about 20%of the global energy *** embodied energy of conventional buildings is high due to the utilization of energy-intensive construction mate-rials and traditional construction *** operational energy is attributed to the usage of power-consuming conventional air-conditioning ***,moving to an energy-efficient cooling technology and eco-friendly building material can lead to significant energy savings and CO 2 emission *** the present study,an energy-efficient thermally activated building system(TABS)is integrated with glass fiber rein-forced gypsum(GFRG),an eco-friendly building *** proposed hybrid system is termed the thermally activated glass fiber reinforced gypsum(TAGFRG)*** system is not only energy-efficient and eco-friendly but also provides better thermal *** experimental room with a TAGFRG roof is constructed on the premises of the Indian Institute of Technology Madras(IITM),Chennai,located in a tropical wet and dry climate *** influence of indoor sensible heat load and the impact of natural ventilation on the thermal comfort of the TAGFRG system are *** increase in internal heat load from 400 to 700 W deteriorates the thermal comfort of the indoor *** is evident from the increases in operative temperatures from 29.8 to 31.5℃ and the predicted percentage of dissatisfaction from 44.5%to 80.9%.Natural ventilation increases the diurnal fluctuation of indoor air temperature by 1.6 and 1.9℃ for with and without cooling cases,*** reduces the maximum indoor CO 2 concentration from 912 to 393 ppm.

关键词： Thermally activated building system Air-conditioning Natural ventilation Thermal comfort Indoor air quality

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