抄録
Computer simulation analysis was made for theoretical thermal characteristics of double stage compression double stage expansion cycle, which is one of the multistage heat pump system, and the steady state solution of convergence was obtained, component characteristics being replaced by simplified experimental models. Also, experiments were performed by cycle simulation system using R22 as a working fluid and the steady results of measurements were obtained. Useful information for the design and estimation of multistage heat pump systems were obtained, by the consideration of the effect of the change for the performance parameter of condensation temperature, working fluids, intermediate temperature on the cycle characteristics.
