Resilient cooling pathway for extremely hot climates in southern Asia
Resilient cooling pathway for extremely hot climates in southern Asia
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适用于南亚极热气候的弹性冷却通道
DOI：
10.1016/j.apenergy.2022.119811
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发表时间：
2022
期刊：
影响因子：
11.2
通讯作者：
Mehmood S
中科院分区：
文献类型：
--
作者：
Mehmood S
全球变暖正在增加极端高温条件，现有的能源效率政策显示出缓解目标和适应气候变化之间的权衡。这项研究旨在确定最佳的弹性冷却解决方案，应在极热国家的建筑环境中推广，以提高其热弹性能力。通过对A2（中高）排放情景下2020年、2050年和2080年南亚不同极端炎热干燥气候条件下气候变化对气候带、制冷热需求（kWh/m2）和建筑物室内热不适时数（DHh，hours）的影响进行参数分析。然后，强调了具有更高协同效应的冷却替代方案以及能源效率（能源消耗）和极端高温弹性（被动生存能力）之间的权衡。利用TRNITAL模拟软件和ASHRAE标准划分气候区，计算建筑物的制冷需求和不适时数。南亚的巴基斯坦被选为具有不同气候区特征的热参考区。模拟情景显示，到2080年，巴基斯坦极端炎热干燥的气候面积可能从36.9%增加到78.1%，每年的制冷需求从20.56增加到66.96 kWh/m2，室内不适时间从423增加到1267 h。结果表明，节能和室内舒适时间之间具有更高协同作用的被动解决方案是如何按降序排列的，通风冷却，反射和通风屋顶，窗户遮阳和屋顶隔热。它们可以节省13.1至7.1 kWh/m2的能源，同时在极端炎热的气候下减少320至131小时的室内不适。此外，与更高的恒温器设置（从24 - 25 °C到25-26.5 °C）相关的充足行动是减少能源需求的最有效策略。此外，在通风问题得不到充分解决的情况下，采用高度隔热的替代方案，在节能和耐热性之间存在权衡。尽管节能量增加了14.4千瓦时/平方米，但当空调不可用时，不适时间增加了256小时，使建筑物过热增加了5.1%。
Global warming is increasing extreme heat conditions, with existing energy efficiency policies showing trade-offs between mitigation objectives and adaptation to climate change. This research aims to identify the best resilient cooling solutions that should be promoted in the built environment of extremely hot countries to increase their heat resilience capacity. The impact of climate change on climate zones, cooling thermal demand (kWh/m2), and indoor heat discomfort hours (DHh, hours) in buildings is evaluated in different extremely hot dry climates of southern Asia through a parametric analysis for 2020, 2050 and 2080 under the A2 (medium–high) emission scenario. Then, cooling alternatives with higher synergies and trade-offs between energy efficiency (energy consumption) and resiliency to extreme heat (passive survivability) are highlighted. TRNSYS simulation software and ASHRAE criteria were used to characterise climate zones and calculate buildings' cooling needs and discomfort hours. Pakistan, in southern Asia, was selected as a hot reference region characterised by various climatic regions. The simulated scenario shows how Pakistan's extremely hot dry climate surface may increase from 36.9 % to 78.1 % by 2080, increasing annual cooling needs ranging from 20.56 to 66.96 kWh/m2and indoor discomfort hours ranging from 423 to 1267 h. The results demonstrate how the passive solutions with higher synergies between energy savings and indoor comfort hours are, in decreasing order, ventilative cooling, reflective and ventilated roofs, shading in windows, and roof insulation. They can provide energy savings ranging from 13.1 to 7.1 kWh/m2while reducing indoor discomfort by 320 to 131 h for extremely hot climates. Moreover, the sufficiency action related to higher thermostat settings, from 24 to 25 °C to 25–26.5 °C, was the most effective strategy to decrease energy demand. Additionally, there are trade-offs between energy-saving and heat resilience with highly insulated alternatives when ventilation is not adequately addressed. Despite increasing energy savings by 14.4 kWh/m2, discomfort hours are increased by 256 hours when air conditioning is unavailable, increasing building overheating by 5.1 %.
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影响因子：
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作者：
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DOI：
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发表时间：
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