三元双向相变储能换热器的数值模拟与分析

Numerical Simulation and Analysis on the Phase Change Energy Storage Heat Exchanger with Three Elements and Double Flow Directions

目的建立应用于通信基站中的相变储能空调系统中的相变储能模块,使得空调系统达到在夜间利用室外自然冷源和低压电同时给相变材料蓄冷,以解决通信基站等设备高负荷运作的高温地点中的冷负荷问题.方法建立了一种三元双向的板式壳式换热器,基于不同气候下基站房间的供冷需要,提出了相变储能空调工作的5种工况,并对该换热器的四种运行情况下的蓄、释冷情况进行了模拟仿真,最后对其传热单元数进行了计算.结果通过对相变储能换热器的模拟,得出其蓄、释冷过程中的温度分布,液相分布,蓄冷与释冷规律,计算得出笔者设计的此种相变储能换热器的综合传热单元数为3.5.结论笔者设计的相变储能模块可以满足对通信基站房间进行供冷的要求,具有较高的传热效能,在工程实践中具有可行性.

A phase change energy storage module in the phase change energy storage air conditioning system used in the communication base station was established to achieve the goal that uses the outdoor natural cold source and the low voltage to charge the heat transfer and the phase change material and to solve the cooling load problem in the high load operation of the communication base station equipment. Based on the need of the base station room under different climates and cooling demands, a ternary two-way plate heat exchanger was built and five working kinds of phase change energy air conditioning were considered. Cooling storage and release conditions of the heat exchanger under four kinds of operation conditions were stimulated. The temperature distribution, the liquid distribution and the basic law of cold storage and release were obtained. The heat exchanger unit number obtained by calculation for the designed phase change energy storage is 3.5. Conclusion is that the designed phase change energy storage module can meet the cooling requirement of communication base station in the room. The module has also high heat transfer efficiency, which means it is feasible for engineering application.