Abstract
This work thoroughly analyses the developments in dynamic modelling for vapor compression refrigeration (VCR)/heat pump (HP) systems described in the open literature. In theory, the transient and steady states can be used to categorize the entire operation of a VCR system. The input/output states in such a system are not constant, particularly during the start-up or shut-down processes. This is due to external disturbances such as the closed-loop control system, input load, and room temperatures. The VCR system changes from a stable state to another in any scenario. Therefore, dynamic simulations have been extensively used for optimal design and performance prediction of refrigeration systems. The present paper summarizes various available models of heat exchangers (evaporators and condensers), compressors, throttle valves, and the whole system. Furthermore, simulation techniques like Dymola, VCR simulator, LF74, TRPUMP, FLUINT/SINDA and RADS are also presented. Over the last few years, much R&D has focused on improving the accuracy of dynamic simulation models. This review suggests prospective future research directions for dynamic simulation of VCR/ HP technology.
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