新型高效热管式空调系统节能装置研究

【作者】 高鹏；

【导师】 涂淑平；

【作者基本信息】 上海海事大学 ， 制冷及低温工程， 2006， 硕士

【摘要】 由于空调系统新风、排风的距离较远，应用传统的能量回收装置需要建造较长的气体输送管道使得冷、热气体汇聚到同一地点进行热交换，这不仅是不经济的，且在实际工程中几乎不可行。据此，本文提出一种新型高效热管空调系统节能装置——传热效率较高的分离式热管换热回收器。将分离式热管用于空调系统排风的能量回收，巧妙利用分离式热管的特点，既可避免大流量气体迁移导致的复杂管路设计，又能有效回收排风中的低品位能量，减少了制冷、制热设备的制冷、制热量，从而达到节能的目的。 本文对分离式热管的整体热量传递特性及冷凝段的冷凝换热进行了由浅入深的理论分析和实验研究。针对分离式热管换热器的结构特点、工作原理及其实际应用条件，以单根热管作为分析换热器热量传递特性的物理模型，结合传热过程分析，采用前人的经验公式，分段处理分离式热管的能量传递参数，建立了数学模型，并用Visual Basic语言编制计算机程序进行了冷凝换热系数和不同蒸发温度时最佳充液率的求解，为分离式热管能量传递特性分析提供了一个有效的手段。 针对冷凝段的换热特点，参照Nusselt理论建立流动模型，分析得到冷凝换热系数的无因次数关联式，得到初步理论解。排风温度、排风量、工作温度(蒸发温度)、充液率均对分离式热管冷凝换热有较大影响，本文针对以上因素分别进行了实验测试，并得到相应的结论，为工程实际应用提供了科学依据。同时，也对其经济性进行了分析，并与转轮全热交换器进行了比较。更多还原

【Abstract】 Owing to the distance between fresh air and exhaust air, conventional energy recovery equipments need to build long air pipes to bring cold air and hot air together for energy exchange, which is not cost-effective or practicable. Thus the paper has proposed separated type heat pipe be applied to the energy recovery in air condition system, which is able to avoid complex pipe design led by large amount fluid transfer and recover efficiently low quality energy in exhaust air. Separated type heat pipes in air condition systems can reduce the load of the refrigerator and heater, which is energy saving.In this paper, a theoretical and experimental investigation on the whole energy transportation and condensation performance of the condensation section was conducted. First, based on the structure, working principle and application condition of the separated type heat pipe, taking single heat pipe as physical model for analysis, combined with analysis of heat transfer, adopting some experience formulas, a mathematical model was developed. The program was put forward by virtue of Visual Basic. The program put out results on heat transfer coefficient of the condensation section and on optimum charge at different working temperature. The model has provided an effective method for analysis of the problem.Secondly, based on Nusselt’s theory and the characteristics of the heat transfer in the condensation section, the analysis was conducted and the fundamental theoretical solution was established. The temperature of exhaust, the flux of exhaust, the temperature of the evaporation section and the amount of working fluid have the influence on heat transfer of the evaporation section. At last, the experiment was conducted measuring the degree of the influence. On the basis of the experiment data, some results were discussed and some conclusions was erected. The solution has provided scientific basis for application of the separated type heat pipe. Furthermore, It calculates the value of saved exhaust air energy and its economic efficiency, as well as compares heat pipe heat exchanger with rotary total heat recovery system.更多还原