| 摘要: |
| 提出带蓄热材料的热管式自然对流散热末端新型式，在热管式末端的换热管上外加套管，管间填充蓄热材料。管内蒸气通过凝结换热，将热量传递给蓄热材料后再传递给外套管，外套管与室内空气进行自然对流换热和辐射换热，构造出新型家用空气源热泵系统。建立了带固体蓄热材料的热管式散热末端的传热模型，研究热泵系统启停过程，蓄热材料种类、厚度对温度分布随时间变化的影响；分析热泵系统的制热量、压缩机功率等宏观性能系数的变化规律。结果表明，固体蓄热材料中镁砖效果较好；热泵运行时间和蓄热材料外表面温度受蓄热体厚度影响，且存在一个临界厚度；当选取12mm厚的镁砖蓄热材料时，带蓄热末端的家用空气源热泵运行12min，供热时间26min，表面温度变化在35℃-50℃范围内。 |
| 关键词: 散热末端 固体蓄热 套管 间歇运行 |
| DOI： |
| 投稿时间：2023-04-17 修订日期：2023-07-08
录用日期：2023-08-03 |
| 基金项目:国家重点研发计划 |
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| Natural convection heat transfer characteristics of domestic air source heat pump regenerative heat pipe radiator |
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| Abstract: |
| A new type of heat pipe type natural convection heat dissipation terminal with heat storage material is proposed. A sleeve is added to the heat exchange tube at the end of the heat pipe type, and the heat storage material is filled between the tubes. Through condensation heat exchange, the steam in the tube transfers heat to the heat storage material and then to the outer sleeve, and the outer sleeve carries out natural convection heat exchange and radiation heat exchange with indoor air, thus constructing a new household air source heat pump system. The heat transfer model of heat pipe heat sink with solid heat storage material is established, and the start-stop process of heat pump system, the influence of the type and thickness of heat storage material on the temperature distribution with time are studied. The variation law of macro performance coefficients such as heating capacity and compressor power of heat pump system is analyzed. The results show that the effect of magnesium brick in solid heat storage materials is better; The running time of heat pump and the external surface temperature of heat storage material are affected by the thickness of heat storage body, and there is a critical thickness; When magnesium brick with a thickness of 12mm is selected as heat storage material, the domestic air source heat pump with heat storage terminal runs for 12min, the heating time is 26min, and the surface temperature changes within the range of 35℃-50℃. |
| Key words: Heat dissipation end Solid heat storage Casing discontinuous runnin |
