Jiang, Yuntao; Ma, Yitai; Fu, Lin; Li, Minxia - In: Energy 55 (2013) C, pp. 916-924
Improving the efficiency of trans-critical CO2 heat pump systems becomes one of the investigative focuses of the development of refrigeration technologies. The use of expander can improve the efficiency of trans-critical CO2 cycles, and make it near to that of traditional refrigeration systems....