基于双蒸发温度直膨式温湿分控空调系统的高低温能级模拟分析研究

Simulation and Analysis of High-Low Temperature Energy Levels in a Direct Expansion Dual Evaporation Temperature THIC Air Conditioning System

摘要: 本研究运用集总参数法建立了高低温侧直膨式蒸发器的模型，并进行模拟计算。结果发现，EEV1在改变开度时主要影响高温侧制冷剂流量；EEV2在改变开度时仅会影响低温侧制冷剂流量。且发现系统总冷量和高低温侧冷量的可调节范围均与压缩机的频率成正比，增大压缩机频率会使系统冷量的可调节范围更加广泛。结合高低温侧蒸发器的冷量分配规律以及新回风出口参数随进口参数的变化规律，计算分析作出系统的运行调节特性图，在图中可以直观地看出在不同室外工况下系统的运行调节范围及分布情况。这为后续双蒸发温度直膨式温湿分控空调系统机组的建立、运行调节以及温湿度控制方法的开发与应用提供了重要的理论基础。

Abstract: This study used the lumped parameter method to establish a model of a high and low temperature side direct expansion evaporator and conducted simulation calculations. It was found that EEV1 mainly affects the flow rate of high-temperature side refrigerant when changing the opening degree; EEV2 only affects the refrigerant flow rate on the low-temperature side when changing the opening degree. And it was found that the adjustable range of the total cooling capacity and the cooling capacity on the high and low temperature sides of the system are directly proportional to the frequency of the compressor. Increasing the compressor frequency will make the adjustable range of the system cooling capacity more extensive. By combining the cold distribution law of the high and low temperature side evaporators and the variation law of the new return air outlet parameters with the inlet parameters, a system operation regulation characteristic diagram is calculated and analyzed. In the diagram, the operating regulation range and distribution of the system under different outdoor conditions can be intuitively seen. This provides an important theoretical basis for the establishment, operation regulation, and development and application of temperature and humidity control methods for subsequent dual evaporation temperature direct expansion temperature and humidity control air conditioning system units.