To respond to new energy efficiency standards and environmentally friendly policies in hot climate regions, it is necessary to develop high-efficiency air conditioners. The environmentally friendly and favorable thermophysical properties of R290 and the high efficiency of rotary compressors have led to the proposal of R290 rotary compressors for use in split-room air conditioners in hot climate regions. The performance of R290 rotary compressor at high temperatures requires in-depth research. In this study, an R290 rotary compressor was experimentally and numerically studied at different ambient temperatures (t_a = 35 °C, 46 °C, and 55 °C), using different oils (mineral oil and synthetic oil). The results show that the volumetric efficiency (η _v) and adiabatic efficiency (η _ad) of the R290 rotary compressor decrease by only 5% and 6%, respectively, from t_a = 35 °C to 55 °C; even at 55 °C, η _v and η _ad are 89% and 67%, respectively, while the decrements of the R32 rotary compressor both reached more than 10%. In addition, the R290 rotary compressor performance differs with different oils because of miscibility, solubility, and viscosity influences on leakage and friction losses.

为了响应炎热气候地区的新能源效率标准和环保政策，有必要开发高效空调。R290的环保和良好的热物理性能以及旋转压缩机的高效率，导致提出了R290旋转压缩机在炎热气候地区的分体式空调中使用的建议。R290旋转式压缩机在高温下的性能需要深入研究。在这项研究中，使用不同的机油（矿物油和合成油）在不同的环境温度（t _a = 35°C，46°C和55°C）下对R290旋转压缩机进行了实验和数值研究。结果表明，容积效率（η _v）和绝热效率（η _广告）的R290旋转压缩机减少只有5％和6％，分别从吨_一个 = 35℃至55℃; 甚至在55℃下，η _v和η _广告是分别为89％和67％，而R32旋转式压缩机的递减既达到10％以上。此外，R290旋转式压缩机的性能因油的不同而不同，这是因为混溶性，溶解性和粘度会影响泄漏和摩擦损失。