二次热管热回收式空调系统的研究

发布时间：2018-03-24 23:36

  本文选题：回收　切入点：热管　出处：《昆明理工大学》2017年硕士论文

【摘要】：热管以其优越的超导热性、稳定性、体积小以及可控性等特点在中央空调系统中得到了广泛的运用,对热管性能优化以及新型热管的研发也成为研究的热点。论文提出一种二次热管热回收式空调系统,其利用热管换热器做到二次热回收,设计该系统并搭建试验台,通过理论计算和试验比较该系统与其他系统之间的差异。(1)从原理上对比本系统与无热管热回收系统、一般热管热回收系统之间的差异,本系统将毛细芯热管换热器和毛细泵回路热管换热器组合利用做到空调系统的全季节降低能耗。以合肥为例,从理论上分析了二次热管热回收式空调系统的冬、夏季能耗,相比于无热管式空调系统,本系统在夏季可以节能25.7%,冬季可以节能22.1%;相比于一般热管式空调系统,本系统在夏季可以节能2.5%,冬季可以节能22.1%。(2)根据系统的要求对热管进行设计计算,得出热管和热管换热器的物理参数及热工参数,并对定制产品作性能校核;改造实验室设备搭建试验台并对系统做实验测试。(3)通过对实验数据的分析得出本系统冬季新风风速在1.20～1.85 m/s之间时系统热回收率能达到10%～23.2%;夏季新风风速在1.20～2.0m/s,室内外温差在4.2～8.0℃时系统热回收率能达到35%～55%,并提供了0～7.4℃的再热温差,表明了这种新的中央空调系统具有独特节能优势。(4)提出热管换热非对称性理论并推导出原理性公式,用以解释换热器两端温差周期性波动,热量得失不相等和换热效率周期性波动的现象。并通过拟合公式和实验数据证明其周期性和波动性。
[Abstract]:Heat pipe has been widely used in central air conditioning system because of its excellent superconducting heat, stability, small size and controllability. The optimization of heat pipe performance and the research and development of new heat pipe are also becoming the focus of research. This paper presents a secondary heat pipe heat recovery air conditioning system, which uses heat pipe heat exchanger to achieve secondary heat recovery, designs the system and builds a test bed. The difference between this system and other systems is compared by theoretical calculation and experiment.) in principle, the difference between this system and the heat recovery system without heat pipe and the general heat pipe heat recovery system is compared. In this system, the capillary core heat pipe heat exchanger and capillary pump loop heat pipe heat exchanger are combined to reduce the energy consumption of the air conditioning system throughout the season. Taking Hefei as an example, the energy consumption in winter and summer of the secondary heat pipe heat recovery type air conditioning system is analyzed theoretically. This system can save energy 25.7 in summer and 22.1 in winter, compared with the conventional heat pipe air conditioning system. This system can save energy 2.5 in summer and 22.1. in winter) according to the requirements of the system, the heat pipe is designed and calculated, the physical and thermal parameters of heat pipe and heat pipe heat exchanger are obtained, and the performance of customized products is checked. Through the analysis of the experimental data, it is concluded that the system heat recovery rate can reach 1023.2when the winter fresh wind speed is between 1.20 and 1.85 m / s, and the summer fresh wind speed is 1.20 ~ 2.0 m / s, indoor and outdoor wind speed is 2.0 m / s. When the temperature difference is 4.2 鈩，

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