| With the development of technology, the miniature and lightweight of machineriesand equipments have been realized through processing technology of the micro-electromechanical systems (MEMS), thus their scope of use have been expanded. Miniaturerefrigeration system not only reduces energy waste, but also reduces environmentalpollution. Moreover, it is widely used in various special occasions due to its tiny andportable features. At present, preliminary studies of the miniature refrigeration system arecarried out in a few laboratories in China, but the refrigeration performance is not so ideal,meanwhile, the size and weight of the system is large.In order to improve the coefficients of performance, reduce volumetric and weightof the system in order to meet the requirements of energy-saving and environmental-protection, we select the rolling rotor compressor to be research object, which has theadvantages of compact structure, low noise, high efficiency and so on. Theoreticalanalysis of structure, working principle, leakage and noise of the compressor has beencarried out, using R134a (the ODP is0) as refrigerant in the system. Finally, a0.6kgprototype of miniature rolling rotor compressor was produced in accordance to thestructure size of optimized design.In order for experimental study of miniature rolling rotor compressor, we producedthe U type tube heat exchanger, the heat transfer quantity of which is400W, and built theexperimental platform of miniature refrigerant system according to single-stagerefrigeration cycle steam. Test results show that the optimum operating speed of thecompressor is3000rpm, and COP has the maximum value at the same time. Finally,numerical simulate work of the compressor which we designed has been done throughFLUENT, and then analyzed the variation of pressure field, temperature field andvelocity vector in cylinder during the operation. The results are basically consistent withtheoretically analysis, the rationality of compressor has been validated. |
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