气候变化领域集成服务门户(CCPortal): Revising the definition of anthropogenic heat flux from buildings: role of human activities and building storage heat flux

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DOI	10.5194/acp-22-4721-2022
	Revising the definition of anthropogenic heat flux from buildings: role of human activities and building storage heat flux
	Liu, Yiqing; Luo, Zhiwen; Grimmond, Sue
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	4721
结束页码	4735
卷号	22 期号:7 页码:15
英文摘要	Buildings are a major source of anthropogenic heat emissions, impacting energy use and human health in cities. The difference in magnitude and time lag between building energy consumption and building anthropogenic heat emission is poorly quantified. Energy consumption (Q(EC)) is a widely used proxy for the anthropogenic heat flux from buildings (Q(F,B)). Here we revisit the latter's definition. If Q(F,B) is the heat emission to the outdoor environment from human activities within buildings, we can derive it from the changes in energy balance fluxes between occupied and unoccupied buildings. Our derivation shows that the difference between Q(EC )and Q(F,B) is attributable to a change in the storage heat flux induced by human activities (Delta So-uo) (i.e. Q(F,B) = Q(EC) - Delta So-uo). Using building energy simulations (EnergyPlus) we calculate the energy balance fluxes for a simplified isolated building (obtaining Q(F,B), Q(EC), Delta So-uo) with different occupancy states. The non-negligible differences in diurnal patterns between Q(F,B) and Q(EC) are caused by thermal storage (e.g. hourly Q(F,B) to Q(EC) ratios vary between -2.72 and 5.13 within a year in Beijing, China). Negative Q(F,B) can occur as human activities can reduce heat emission from a building but this is associated with a large storage heat flux. Building operations (e.g. opening windows, use of space heating and cooling system) modify the Q(F,B) by affecting not only Q(EC) but also the Delta So-uo diurnal profile. Air temperature and solar radiation are critical meteorological factors explaining day-to-day variability of Q(F,B). Our new approach could be used to provide data for future parameterisations of both anthropogenic heat flux and storage heat fluxes from buildings. It is evident that storage heat fluxes in cities could also be impacted by occupant behaviour.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000781016000001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273498
作者单位	University of Reading; University of Reading
推荐引用方式 GB/T 7714	Liu, Yiqing,Luo, Zhiwen,Grimmond, Sue. Revising the definition of anthropogenic heat flux from buildings: role of human activities and building storage heat flux[J],2022,22(7):15.
APA	Liu, Yiqing,Luo, Zhiwen,&Grimmond, Sue.(2022).Revising the definition of anthropogenic heat flux from buildings: role of human activities and building storage heat flux.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(7),15.
MLA	Liu, Yiqing,et al."Revising the definition of anthropogenic heat flux from buildings: role of human activities and building storage heat flux".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.7(2022):15.