用于离心式高温热泵机组研发的模拟模型

Simulation model for researching and developing the high-temperature heat pump with two-stage centrifugal compressor

为了对所设计的高温热泵机组中各设备进行合理匹配,建立其稳态模拟模型。该模型包括关键部件的子模型:带有经济器的双级离心式压缩机、卧式壳管式冷凝器、浮球膨胀阀、满液式蒸发器和回热器。在模拟算法的设计中,将模块化方法与二分法相结合,所需输入参数易于为设计者所获得,且不会限制系统的运行。利用该模型,对高温热泵进行初步设计;经过多方案比较,确定各换热器的结构参数,并预测该系统的性能和运行参数。

Presents one steady state simulation model of high-temperature heat pump system（HTHP） with the object of matching the various components in this system. The model includes the sub-models for key components, such as two-stage centrifugal com- pressor with one middle economizer, shell-tube condenser, expansion valve, flooded evaporator and suction line heat exchanger. Develops the simulation algorithm, by combining modular method with dimidiate method, with the object of requiring input data that are readily available to the design engineer while not constraining system operation. Uses the model to elementarily design the HTHP and determines the configuration parameters and area of the heat exchangers by simulating many design schemes. Moreover, predicts the corresponding system performance and operating parameters.