Performance of Transcritical CO2 air source heat pump system

Centered on a theoretical analysis of an air-source transcritical CO2 heat pump system, a mathematical model for the compressor was eveloped using an efficiency analysis in this study. Additionally , a mathematical model for the expansion valve was built utilizing a structural analysis; and mathematical models for the gas-cooler, evaporator, and regenerator were developed using the distributed parameter method. Moreover, a mathematical model for the entire system was built by combining these models. The accuracyof the system model was verified by an experimental test, which showed that the deviation in the unit's input power involving the calculated value and measured value was significantly less than 4. 4�? the mean deviation in the heating capacity was 5. 76�? and the deviation in the suitable discharge pressure was significantly less than 0. 1 MPa. Ergo, it absolutely was possible to calculate the device performance by employing the mathematical simulation method.