| Nowadays, the microminiaturization of equipments and systems has attracted a great deal attentions along with the development of MEMS (Micro Electro-Mechanical System). Vapor-compression type refrigeration system is a good candidate for micro-refrigeration systems, which has many advantages, such as low flow rate, small volume, high COP and so on.First of all, in this paper, we established the simulation models for all components in a micro refrigeration system, and obtained all their simulation results by programmed codes, including the working performances under design working condition and the performance variation on other working conditions. Then, the steady micro vapor compression type refrigeration system simulation model was designed by ordering arithmetic according to the balance of the govern equations: energy equation, momentum equation and continuous equation. Finally, several visible executable interfaces were obtained, and the system performance under different working conditions was predicted.For optimization of the system, we analyzed all the exergies about components in the system, and find out which component has the maximum energy loss. Finally, we presented optimizations methods for the thermal-leaking and low compressing ratio of the micro-compressor.In order to understand the flow and heat transfer character of HFC134a in micro-channel condenser deeply, we did the responding experiment with micro-channel size of 0.15X0.5mm. Under the condition of experiment, the total thermal dissipation is about 4W. Finally, we observed the flow process of the condensation of HFC134a in the micro-channel.
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