For providing the basis for the application of the CO2 injector in the CO2absorption- jet combined cooling heating and power system,this article firstly analyzed performance of injector which was the core of the system. Based on the characteristics of the injector and the CO2-[emim][Tf2N],combined with the feature of running of the system,under the environment of Vc + +,according to calculation formula of the ejector design and performance,programming was designed. According to theoretical calculation,worki...