周期性环境条件下围护结构热物性对系统能耗及目标热控效果的影响

doi:10.3969/j.issn.1000-1093.2015.09.016

兵工学报 ›› 2015, Vol. 36 ›› Issue (9): 1710-1721.doi: 10.3969/j.issn.1000-1093.2015.09.016

周期性环境条件下围护结构热物性对系统能耗及目标热控效果的影响

叶宏，张海涛

（中国科学技术大学热科学和能源工程系，安徽合肥 230027）

收稿日期:2015-03-02 修回日期:2015-03-02 上线日期:2015-11-20
作者简介:叶宏(1973—)，男，副教授
基金资助:
国家自然科学基金项目(51576188)

The Influences of Thermophysical Properties of Enclosure on the System Energy Consumption and the Object Thermal ControlEffects under Periodic Environmental Conditions

YE Hong, ZHANG Hai-tao

（Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230026, Anhui, China）

Received:2015-03-02 Revised:2015-03-02 Online:2015-11-20

摘要/Abstract

摘要： 研究探讨了周期性环境条件下，围护结构材料的热物性对主动通风式热控系统的能耗和目标表面温度时间稳定性及空间均匀性等热控效果的影响。基于简化模型遍历分析了实际气象条件下，围护结构的导热系数和体积比热容两个关键参数对系统平均功耗及目标热控效果的影响，发现体积比热容的影响对材料导热系数的取值及进风温度与环境日平均温度相对高低有很强的依赖性。环境日平均温度高于或低于进风温度时，系统平均功耗及目标热控效果的主导因素为导热系数。环境日平均温度与进风温度接近时，在导热系数小于0.1 W/(m·K)的情况下，体积比热容对系统平均功耗及热控效果影响较小；但导热系数高于0.1 W/(m·K)时，增大体积比热容可降低系统平均功耗且提高目标表面温度时间稳定性及空间均匀性。

关键词: 工程热物理, 周期性环境条件, 导热系数, 体积比热容, 热控效果, 平均功耗

Abstract: The influences of thermophysical properties of an enclosure on the energy consumption of an active ventilated thermal control system and the thermal control effects, such as time stability and space uniformity of the object surface temperature, under periodic environmental conditions are investigated. The effects of the thermal conductivity and volumetric heat capacity of enclosure on the average power consumption of system and the thermal control effects of object are studied based on a simplified model under the actual weather conditions. It is discovered that the influence of the volumetric heat capacity depends on the value of the thermal conductivity, the inlet air temperature as well as the average temperature of ambient air. When the average ambient air temperature is higher or lower than the inlet air temperature, the thermal conductivity becomes a dominant factor. However, when the average ambient air temperature is close to that of the inlet air, the volumetric heat capacity has little effect on the average power consumption and the thermal control effects if the thermal conductivity is less than 0.1 W/(m·K); if the thermal conductivity is higher than 0.1 W/(m·K), the increase in the volumetric heat capacity could not only reduce the average power consumption but also enhance the time stability and the space uniformity of the object surface temperature as well.

Key words: engineering thermophysics, periodic environmental condition, thermal conductivity, volumetric heat capacity, thermal control effects, average power consumption

中图分类号:

TK121

叶宏，张海涛. 周期性环境条件下围护结构热物性对系统能耗及目标热控效果的影响[J]. 兵工学报, 2015, 36(9): 1710-1721.

YE Hong, ZHANG Hai-tao. The Influences of Thermophysical Properties of Enclosure on the System Energy Consumption and the Object Thermal ControlEffects under Periodic Environmental Conditions[J]. Acta Armamentarii, 2015, 36(9): 1710-1721.

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周期性环境条件下围护结构热物性对系统能耗及目标热控效果的影响

The Influences of Thermophysical Properties of Enclosure on the System Energy Consumption and the Object Thermal ControlEffects under Periodic Environmental Conditions

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