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Heat storage and release characteristics of composite phase change wall under different intermittent heating conditions

机译：不同间歇加热条件下复合相变壁的蓄热和释放特性

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摘要

During intermittent heating, the heat storage and release of building envelopes are caused by indoor thermal environment variations. The heat storage and release process of the building envelope inside can be used to reduce heat loss in intermittent cycles and maintain the indoor thermal environment for occupant comfort while saving energy by efficiency in the operation. In this research, the building envelope was integrated with phase change materials, and the heat transfer model was established and verified to analyze the heat storage and release processes of composite phase change wall (composite-PCW) under two typical intermittent heating conditions. Effective heat storage utilization rate eta and heat loss rate epsilon were used to evaluate the wall's heat storage and release characteristics and energy efficiency, and the composite-PCW was compared with a solid brick wall. The results show that (1) the eta of the composite-PCW was 75.07% in the long intermittent condition; (2) the thermal processes were relatively stable in the last three cycles of the short intermittent condition, and the eta was greater than 70%; and (3) the epsilon of the composite-PCW was smaller under the two intermittent conditions compared with the solid brick wall and was reduced by more than 36%.
机译：在间歇加热期间，建筑包络的蓄热和释放是由室内热环境变化引起的。内部的建筑包络的蓄热和释放过程可用于减少间歇循环中的热量损失，并维持室内热环境，以便在操作中通过效率节省能量。在该研究中，建筑包络与相变材料集成，并建立了传热模型，并验证了在两个典型的间歇加热条件下分析复合相变壁（复合PCW）的蓄热和释放过程。有效的蓄热利用率ETA和散热速率Epsilon用于评估墙体的蓄热和释放特性和能量效率，并将复合PCW与固体砖墙进行比较。结果表明（1）长期间歇性条件下复合PCW的ETA为75.07％; （2）在短暂间歇性条件的最后三个循环中，热过程相对稳定，ETA大于70％; （3）与固体砖墙相比，复合型PCW的ε在两个间歇性条件下较小，减少了36％以上。

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  • 作者

    Li Yanru; Long Enshen; Jin Zhenghao; Li Jin; Meng Xi; Zhou Jing; Xu Luting; Xiao Dongtian;

  • 作者单位

    Sichuan Univ Coll Architecture &

    Environm Adm Bldg 24 First Loop South First Sect Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ Coll Architecture &

    Environm Adm Bldg 24 First Loop South First Sect Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ Hong Kong PolyU Inst Disaster Management &

    Reconstruct Chengdu Sichuan Peoples R China;

    Sichuan Univ Coll Architecture &

    Environm Adm Bldg 24 First Loop South First Sect Chengdu 610065 Sichuan Peoples R China;

    Sichuan Agr Univ Coll Architecture &

    Urban Rural Planning Chengdu Sichuan Peoples R China;

    Sichuan Univ Coll Architecture &

    Environm Adm Bldg 24 First Loop South First Sect Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ Coll Architecture &

    Environm Adm Bldg 24 First Loop South First Sect Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ Coll Architecture &

    Environm Adm Bldg 24 First Loop South First Sect Chengdu 610065 Sichuan Peoples R China;

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  • 正文语种 eng
  • 中图分类 建筑基础科学;
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