This paper provides an overview of the model developed for simulation of steady-state performance of a heat pump working with a nonazeotropic binary mixture. The modeled heat pump consists of a hermetic, reciprocating compressor, flat-finned tube heat exchangers, a constant flow area expansion device, an accumulator, a four-way valve, and connecting tubing.

The paper discusses basic concepts in formulation of models of major heat pump components and overall program iteration scheme . Verification of the model is presented in the cooling and heating operating modes for a heat pump charged with R13B1/Rl52a mixture.

Units: I-P