TY - JOUR
TI - Comparative analyses of two improved CO2 combinated cooling, heating, and power systems driven by solar energy
AU - Bai Wanjin
AU - Xu Xiaoxiao
JN - Thermal Science
PY - 2018
VL - 22
IS - 12
SP - 693
EP - 700
PT - Article
AB - To make use of solar energy fully and efficiently, the two improved combined  cooling, heating, and power systems (CCHP) are proposed by adding a gas  heater and an extraction turbine, based on the transcritical CO2 ejector  refrigeration system. A relatively high-pressure fluid is extracted by the  extraction turbine as a primary stream of ejector to improve the ejector  performance. In the meantime, the gas heater absorbs low-temperature exhaust  heat to increase the extraction turbine’s output work. Comparative studies on  the thermal efficiency and exergy efficiency of the two improved systems show  they are more efficient alternatives for the transcritical CO2 ejector  refrigeration system. The CCHP-B system has relatively broad working  condition, higher thermal efficiency and exergy efficiency than that of  CCHP-A system.