Abstract:

A steady-state simulation model of vapor injection heat pump systems with flash tank is developed. In the model, the vapor-injected compressor model is developed by establishing the theory-based explicit equations; the heat exchanger model is established using multi-zone method to reflect the characteristics of each phase zone; and a system iteration algorithm based on sequential module method is developed to solve the component models. The validation results show that, for the compressor model, the deviations of the mass flow rate and input power are within ±7% and ±5%, respectively; for the heat exchanger model, the deviations of the heat capacity and pressure drop are within ±3% and ±4%, respectively. Compared to the traditional heat pump system, the heat capacity is increased by 18.9% when the outdoor temperature is -20℃.

摘要：

开发了带闪发器的中间补气型热泵系统的稳态仿真模型。在模型中，通过建立基于理论的显式表达式，开发了补气压缩机性能计算模型；采用分相区计算方法，建立了能够反映相区特点的换热器性能计算模型；并开发了基于顺序模块的系统迭代算法对各部件模型进行求解。验证表明，压缩机模型对于流量和功率的计算误差分别小于±7%和±5%；换热器模型对于换热量和压降的计算误差分别小于±3%和±4%。与传统热泵系统相比，在室外温度为−20℃的低温工况下，带闪发器的中间补气型热泵系统制热量提升18.9 %。