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首页> 外文期刊>Building and Environment >Risks of summertime extreme thermal conditions in buildings as a result of climate change and exacerbation of urban heat islands
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Risks of summertime extreme thermal conditions in buildings as a result of climate change and exacerbation of urban heat islands

机译：气候变化和城市热岛加剧导致建筑物夏季出现极端高温的风险

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This study explores the role of global and local warming on indoor thermal environments of representative buildings in two warm climate cities in the U.S. (Chicago IL, and Houston TX). It uses downscaled climate change scenarios to drive whole-building model simulations of representative apartment buildings. Simulations were conducted under (a) current conditions; (b) conditions that include a global warming effect; and (c) conditions that include global warming with concurrent intensification of the urban heat island. Building thermal conditions are assessed for typical operating conditions, for conditions associated with failure of cooling equipment, and for complete power loss during a heat wave. Simulations show that warming by itself may have minimal effects on indoor thermal comfort in summer. For example, in Houston the Predicted Percent Dissatisfied (PPD) comfort metric was approximately 5-6％ for current and future climate scenarios under normal operating conditions. Under conditions of AC failure, however, this increased to 61.9％ for the current climate and 71.4％ for the 2050 climate. In the case of Chicago PPD was between 6.2％ and 7.9％ for all climate scenarios when equipment operated normally. Under conditions of equipment failure, however, PPD increased to 34.1％ for the current climate and 39.2％ for the 2050 climate. In simulations for both cities, a complete power failure resulted in peak temperatures that were approximately 2 ℃ cooler than the case of AC failure only. This is due to reduction in internal gains during a power blackout.
机译：这项研究探索了全球和局部变暖在美国两个温暖气候城市（芝加哥IL和休斯敦TX）代表性建筑的室内热环境中的作用。它使用缩小的气候变化情景来驱动代表性公寓楼的整体建筑模型模拟。模拟是在（a）当前条件下进行的； （b）包括全球变暖影响的条件； （c）包括全球变暖和城市热岛同时加剧的情况。针对典型的运行条件，与冷却设备故障相关的条件以及热浪期间的完全功率损耗，评估建筑物的热条件。模拟表明，夏季变暖本身对室内热舒适性的影响极小。例如，在休斯敦，对于正常运行条件下的当前和未来气候情景，预测的不满意百分比（PPD）舒适度指标约为5-6％。但是，在交流电故障的情况下，对于当前的气候，这一比例上升到61.9％，对于2050年的气候，上升到71.4％。以芝加哥为例，在设备正常运行的所有气候情况下，PPD均在6.2％至7.9％之间。但是，在设备故障的情况下，当前气候下的PPD增至34.1％，而2050年气候下的PPD增至39.2％。在两个城市的模拟中，完全的电源故障导致峰值温度比仅AC故障的情况低约2℃。这是由于电源中断期间内部增益的降低。

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