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两相流引射器回收部分压力能,提高压缩机进气压力,从而减小压缩机的耗功、提高系统的性能。对R134a两相流引射制冷系统进行了实验研究,探讨引射器的结构参数对引射器和整个系统的性能的影响情况。实验结果表明,在蒸发温度/冷凝温度为-10℃/40℃,当喷嘴距为0mm时,引射器的引射比和压力提升比均最大,此时系统耗功最小,制冷量最大,系统的性能最优。在蒸发温度/冷凝温度为-10℃/40℃,引射器的扩张角为8°时,引射器的性能最佳,整个系统的性能最好。
Two-phase flow ejector to recover part of the pressure energy to improve the compressor inlet pressure, thereby reducing the compressor’s work and improve system performance. The R134a two-phase flow injection refrigeration system was experimentally studied to investigate the influence of ejector structural parameters on the performance of the ejector and the whole system. The experimental results show that when the evaporation temperature / condensation temperature is -10 ℃ / 40 ℃, when the nozzle distance is 0mm, the ejector injection pressure ratio and pressure rise ratio are both the largest, the system consumes the least energy and the cooling capacity is the largest, System performance is optimal. Evaporator / condensing temperature -10 ℃ / 40 ℃, ejector expansion angle of 8 °, ejector performance is best, the best performance of the entire system.