Anthropogenic heating of the urban environment: An investigation of feedback dynamics between urban micro-climate and decomposed anthropogenic heating from buildings

Vahmani, Pouya; Luo, Xuan; Jones, Andrew; Hong, Tianzhen

doi:10.1016/j.buildenv.2022.108841

Title: Anthropogenic heating of the urban environment: An investigation of feedback dynamics between urban micro-climate and decomposed anthropogenic heating from buildings

Journal Article · Fri Apr 01 00:00:00 EDT 2022 · Building and Environment

DOI:https://doi.org/10.1016/j.buildenv.2022.108841· OSTI ID:1843273

Vahmani, Pouya; Luo, Xuan; Jones, Andrew;

Cities consume 2/3 of global energy and consequently release a large amount of anthropogenic heat into urban environments, which are already vulnerable to extreme heat risk due to the compounding effects of urban heat island and the warming climate. In this study, we use detailed process-based building energy modeling of over 1.1 million buildings in Los Angeles along with a high-resolution urban micro-climate modeling framework to assess the implications of anthropogenic heating for urban micro-climate dynamics and the feedback process between them. We uniquely distinguish between two major components of anthropogenic heating from HVAC system rejections and exhaust/relief air from buildings. We show that the less-studied anthropogenic heating from building exhaust, compared to that from HVAC systems, is mostly a nocturnal phenomenon with more significant implications for local air temperature due to the lower and more stable planetary boundary layer at night. We demonstrate that anthropogenic heating from HVAC rejection and building exhaust not only have reverse diurnal profiles, they also exhibit offsetting behaviors under increasing outdoor temperatures. Our results show that a detailed understanding of the composition of anthropogenic heating, specific to an urban environment, is required to predict its' diurnal dynamics and its’ response to a warming climate.

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Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Biological and Environmental Research (BER)

Grant/Contract Number:: DEAC02-05CH11231; AC02-05CH11231

OSTI ID:: 1843273

Alternate ID(s):: OSTI ID: 1883335

Journal Information:: Building and Environment, Journal Name: Building and Environment Vol. 213 Journal Issue: C; ISSN 0360-1323

Publisher:: ElsevierCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
Anthropogenic heating
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Decomposed anthropogenic heating

Title: Anthropogenic heating of the urban environment: An investigation of feedback dynamics between urban micro-climate and decomposed anthropogenic heating from buildings

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