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- Publisher Website: 10.1016/j.enbuild.2023.113763
- Scopus: eid_2-s2.0-85177770387
- WOS: WOS:001127997800001
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Article: Interaction among local flows, UHI, coastal winds, and complex terrain: Effect on urban-scale temperature and building energy consumption during heatwaves
Title | Interaction among local flows, UHI, coastal winds, and complex terrain: Effect on urban-scale temperature and building energy consumption during heatwaves |
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Authors | |
Keywords | Air-conditioning (AC) load Building category (BC) Building energy consumption Coastal effect Complex terrain Energy policy Local climate zone (LCZ) Local flows Sustainable strategy development Weather Research and Forecasting (WRF) model |
Issue Date | 19-Nov-2023 |
Publisher | Elsevier |
Citation | Energy and Buildings, 2024, v. 303 How to Cite? |
Abstract | Extreme heat aggravates thermal stress and electricity shortage in urban areas. This study investigates the (circulating) winds in Hong Kong during a heatwave. Unprecedentedly, the collective effect of coastal winds, complex terrain, and local flows on urban temperatures and air-conditioning load intensity (ACLI) is examined using the mesoscale Weather Research and Forecasting (WRF) model. Three representative wind patterns,including urban-accelerated channel wind, channel-wind-induced heat advection, and urban-mountainstagnated sea-breeze, are analyzed. Our results show that the mountain blockage in foothill areas would increase 2-m temperatures (T2) and ACLI by 1 ◦C to 2 ◦C and 5 W/m2, respectively. ACLI in compact high-rise areas (LCZ 1) is most sensitive to extreme heat. Moreover, the urban heat island (UHI) downstream is crucial that would accelerate channel flows by 1.66 m/sec (50.26 %). On the other hand, terrain-induced channel winds augment heat advection, increasing downstream T2 (0.7 ◦C) and ACLI (2.62 W/m2). UHI-induced local flows interact with hilly slopes, stagnating the sea breeze on mountain leeward side. Subsequently, the winds would be slowed down by 0.81 m/sec while the temperature T2 would be increased by 0.9 ◦C in downstream urban areas. Eventually, the daytime ACLI could be raised as much as 6.41 W/m2. |
Persistent Identifier | http://hdl.handle.net/10722/339909 |
ISSN | 2023 Impact Factor: 6.6 2023 SCImago Journal Rankings: 1.632 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Du, Ruiqing | - |
dc.contributor.author | Liu, Chun-Ho | - |
dc.contributor.author | Li, Xianxiang | - |
dc.contributor.author | Lin, Chuan-Yao | - |
dc.date.accessioned | 2024-03-11T10:40:14Z | - |
dc.date.available | 2024-03-11T10:40:14Z | - |
dc.date.issued | 2023-11-19 | - |
dc.identifier.citation | Energy and Buildings, 2024, v. 303 | - |
dc.identifier.issn | 0378-7788 | - |
dc.identifier.uri | http://hdl.handle.net/10722/339909 | - |
dc.description.abstract | <p>Extreme heat aggravates thermal stress and electricity shortage in urban areas. This study investigates the (circulating) winds in Hong Kong during a heatwave. Unprecedentedly, the collective effect of coastal winds, complex terrain, and local flows on urban temperatures and air-conditioning load intensity (ACLI) is examined using the mesoscale Weather Research and Forecasting (WRF) model. Three representative wind patterns,including urban-accelerated channel wind, channel-wind-induced heat advection, and urban-mountainstagnated sea-breeze, are analyzed. Our results show that the mountain blockage in foothill areas would increase 2-m temperatures (T2) and ACLI by 1 ◦C to 2 ◦C and 5 W/m<sup>2</sup>, respectively. ACLI in compact high-rise areas (LCZ 1) is most sensitive to extreme heat. Moreover, the urban heat island (UHI) downstream is crucial that would accelerate channel flows by 1.66 m/sec (50.26 %). On the other hand, terrain-induced channel winds augment heat advection, increasing downstream T2 (0.7 ◦C) and ACLI (2.62 W/m<sup>2</sup>). UHI-induced local flows interact with hilly slopes, stagnating the sea breeze on mountain leeward side. Subsequently, the winds would be slowed down by 0.81 m/sec while the temperature T2 would be increased by 0.9 ◦C in downstream urban areas. Eventually, the daytime ACLI could be raised as much as 6.41 W/m<sup>2</sup>.<br></p> | - |
dc.language | eng | - |
dc.publisher | Elsevier | - |
dc.relation.ispartof | Energy and Buildings | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject | Air-conditioning (AC) load | - |
dc.subject | Building category (BC) | - |
dc.subject | Building energy consumption | - |
dc.subject | Coastal effect | - |
dc.subject | Complex terrain | - |
dc.subject | Energy policy | - |
dc.subject | Local climate zone (LCZ) | - |
dc.subject | Local flows | - |
dc.subject | Sustainable strategy development | - |
dc.subject | Weather Research and Forecasting (WRF) model | - |
dc.title | Interaction among local flows, UHI, coastal winds, and complex terrain: Effect on urban-scale temperature and building energy consumption during heatwaves | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.enbuild.2023.113763 | - |
dc.identifier.scopus | eid_2-s2.0-85177770387 | - |
dc.identifier.volume | 303 | - |
dc.identifier.eissn | 1872-6178 | - |
dc.identifier.isi | WOS:001127997800001 | - |
dc.identifier.issnl | 0378-7788 | - |