Simulink Based Transient Modeling of a Flash Tank Vapor Injection System and Experimental Validation

摘要

Dynamic simulations of vapor compression system are an important field of research since they allow investigation into the behavior of a system under time-varying conditions, which is essential for development of an effective control strategy for the system. It is particularly important for advanced cycles such as a flash tank vapor injection (FTVI) cycle since additional control parameters, such as injection vapor temperature or flash tank liquid level, are involved. In this study, a mathematical model for an R410A-based FTVI cycle is developed in Simulink. The model has been used to simulate the operation of the system at ASHRAE High Temperature Cyclic test condition. The simulation results have been validated against measured data. The test methodology involved a startup cycle lasting for 1000 seconds, followed by several step changes in the EEV opening area lasting for 1500 seconds. The results compare reasonably well with the experimental results, as well as with the simulation results from models developed on the Modelica platform in another study. The model can be applied as a tool to develop control strategy for advanced cycles.