Performance Analysis of Integrated Micro-Channel Heat Exchanger

In order to improve the performance of the integrated micro-channel heat exchanger, this study established the steady-state heat transfer model of an integrated micro-channel heat exchanger, and studied the influence law of the structural parameters and operation parameters on it. The integrated micro-channel heat exchanger used R245fa as working medium. It studied the effects of heat exchanger and heat exchanger heat pipe spacing on the total thermal resistance and air-side pressure drop of the system by using the model, which was verified by experiments previously. The results show that when the evaporation section air volume of the integrated micro-channel heat exchanger is 0.41 m³/s, condensing section air volume is 0.21 m³/s and the total thermal resistance of the heat exchanger system is 0.0380 m²·K/W. With the increase of circulating air volume in the condensing section and the evaporation section, the air-side pressure drop of the micro-channel heat exchanger increases, and the total thermal resistance decreases. The downtrend of the total thermal resistance of the micro-channel heat exchanger decreases gradually with the increase of air volume. In scope of this research, it is concluded that the appropriate air volume in the evaporation section is 0.45 m³/s, and that in the condensation section is 0.69 m³/s. With the increase of the integrated micro-channel heat exchanger heat pipe spacing, the total thermal resistance of the micro-channel heat exchanger increases, and the air-side pressure drop of the micro-channel heat exchanger decreases in the evaporation section. When the heat exchanger heat pipe spacing is 6 mm, the comprehensive performance of the integrated micro-channel heat exchanger is the best. The research results provide a reference for the design of cooling equipment for communication base stations and the optimization of the structure and control parameters of the micro-channel heat exchanger.