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首页> 外文期刊>Building and Environment >Thermal storage performance of building envelopes for nearly-zero energy buildings during cooling season in Western China: An experimental study
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Thermal storage performance of building envelopes for nearly-zero energy buildings during cooling season in Western China: An experimental study

机译：中国西部冷却季节近零能量建筑的建筑信封的热储存性能：实验研究

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摘要

Adapting to the local climate is the key to developing nearly-zero energy buildings (NZEBs). During cooling season in Western China, the climate conditions are characterized by a large daily temperature range and high solar radiation, and improving the thermal storage performance of buildings is an effective passive cooling design strategy for NZEBs. This study aims to investigate the thermal storage performance of building envelopes under free-running conditions. A phase change material (PCM) is integrated in an experimental wallboard to enhance its thermal storage performance. To simulate the thermal environment in free-running buildings, a double-sided periodic thermal effect is applied as the indoor and outdoor conditions during the experiment. Different orders of the material layers and thicknesses of the PCM layer are compared to investigate the key factors that affected the thermal storage performance. The thermal inertia index and coefficient of heat accumulation are employed as key parameters to quantify the two factors. The results indicated that enhancing the coefficient of heat accumulation for the wallboard by optimizing the material layer order can reduce the fluctuations in the indoor air temperature by 31%. However, only increasing the thickness of the heat storage material does not significantly improve the attenuation and time delay effect of the wallboards. The coefficient of heat accumulation is proposed as a key parameter for NZEBs design. The design prototype and key parameters of the thermal storage wall considered in this study may provide a reference for the development of NZEBs in Western China.
机译：适应当地气候是开发近零能源建筑（NZEB）的关键。在中国西部的冷却季期间，气候条件的特点是每日温度范围大，太阳辐射高，提高建筑物的热储存性能是一种有效的NZEBS的无源冷却设计策略。本研究旨在调查在自由运行条件下建筑包络的热储存性能。相变材料（PCM）集成在实验墙板中，以提高其热存储性能。为了在自由运行建筑物中模拟热环境，在实验期间将双面定期热效果应用于室内和室外条件。比较PCM层的材料层和厚度的不同订单，以研究影响热存储性能的关键因素。热惯性指数和热累积系数被用作量化两个因素的关键参数。结果表明，通过优化材料层级来增强墙板的热量积聚系数可以将室内空气温度的波动减少31％。然而，只有增加蓄热材料的厚度不会显着改善墙板的衰减和时间延迟效果。提出了热累积系数作为NZEBS设计的关键参数。本研究中考虑的热储存墙的设计原型和关键参数可以为中国西部核的发展提供参考。

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  • 来源
    《Building and Environment》 |2021年第5期|107709.1-107709.14|共14页
  • 作者

    Wang Zhoujie; Qiao Yuhao; Liu Yan; Bao Jiayang; Gao Qinglong; Chen Jingheng; Yao Hui; Yang Liu;

  • 作者单位

    Xian Univ Architecture & Technol State Key Lab Green Bldg Western China Xian 710055 Shaanxi Peoples R China|Xian Univ Architecture & Technol Sch Architecture Xian 710055 Shaanxi Peoples R China;

    Xian Univ Architecture & Technol State Key Lab Green Bldg Western China Xian 710055 Shaanxi Peoples R China|Xian Univ Architecture & Technol Sch Architecture Xian 710055 Shaanxi Peoples R China;

    Xian Univ Architecture & Technol State Key Lab Green Bldg Western China Xian 710055 Shaanxi Peoples R China|Xian Univ Architecture & Technol Sch Architecture Xian 710055 Shaanxi Peoples R China;

    Xian Univ Architecture & Technol State Key Lab Green Bldg Western China Xian 710055 Shaanxi Peoples R China|Xian Univ Architecture & Technol Sch Architecture Xian 710055 Shaanxi Peoples R China;

    China Southwest Architectural Design & Res Inst C Bldg Environm & Energy Conservat Design Res Ctr Chengdu 610000 Sichuan Peoples R China;

    Xian Univ Architecture & Technol State Key Lab Green Bldg Western China Xian 710055 Shaanxi Peoples R China|Xian Univ Architecture & Technol Sch Architecture Xian 710055 Shaanxi Peoples R China;

    Xian Univ Architecture & Technol Sch Architecture Xian 710055 Shaanxi Peoples R China;

    Xian Univ Architecture & Technol State Key Lab Green Bldg Western China Xian 710055 Shaanxi Peoples R China|Xian Univ Architecture & Technol Sch Architecture Xian 710055 Shaanxi Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Nearly-zero energy buildings; Passive design strategy; Thermal storage performance; Reduced-scale experiments; Coefficient of heat accumulation;

    机译：近零能量建筑;被动设计策略;热存储性能;减少规模实验;热量积累系数;

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