Comparative research on air conditioner with gas-injected rotary compressor through injection port on blade

Abstract

Economizer technology has become a critical method to improve the performance of air conditioners with rotary compressor in low ambient temperature. A novel vapor injection structure on the blade of the rotary compressor has been proposed in previous research to overcome the drawback of the traditional cylinder injection structure. Based on a verified numerical system model, the performance of an air conditioner adopting different economized rotary compressors has been investigated. The results indicate that: compared to the single cylinder rotary compressor with traditional injection structure, the rotary compressor with blade injection structure can enhance the heating capacity and COP by 12.9%~15.7% and 1.5%~4.1% in low ambient temperature, respectively. And compared to the twincylinder rotary compressor, the rotary compressor with blade injection structure has a competitive performance.

Döngüsel Kompresörlerde Teknolojik Gelişmeler

“…Silindir enjeksiyonlu klimayla karşılaştırıldığında, palet enjeksiyon yapısının, klimanın ısıtma kapasitesini % 12,5-15,7 ve COP'yi % 1,5-4,1 arttıracağını belirlemişlerdir. Ancak, palet enjeksiyonlu döngüsel kompresörün sistem ısıtma kapasitesinin, tüm çalışma koşullarında iki gövdeli döngüsel kompresörünkinden %4,7 daha az olduğu görülmüştür [106]. Ayrıca, kompresördeki eksantrikliğin doğru ölçüde değiştirilmesi ile enjeksiyon alanında %40-%70 aralığında artış sağlanabileceğini gözlemlemişlerdir [102].…”

Performance Analysis of Internal Heat Exchanger‐Based Quasi‐Two‐Stage Vapor Compression Heat Pump System for High‐Temperature Steam Production

“…Ma et al [11] evaluated the thermodynamic performance of these two quasi-two-stage compression cycles (FT type and subcooler type), and reported that, in comparison to single-stage compression cycles, the FT structure presented the following advantages: the heating capacity and the COP were higher by a factor of 8.6% and 6%, respectively, at the evaporation temperature of À15 C and the condensation temperature of 45 C. Wang et al [12] classified quasi-two-stage compression systems among the economizer technologies. Gas supplementation using a rotary compressor under low-temperature environment is reported to increase the system COP by 1.5-4.1%.…”