Dynamic simulation of a refrigeration cycle of zeotropic refrigerant mixture R407C with concentration shift

摘要

This paper describes about the dynamics of circulating composition of zeotropic refrigerant mixture R407C in a vapor compression refrigeration cycle. The concentration shift in the cycle slightly increases the discharge pressure from the constant circulating composition case, on the other hand it dose not affects the suction pressure. Mass fraction of R134a reduces rapidly from charged initial value immediately after the compressor start-up, then recovers slowly. When receiver is used in the high pressure side, circulating composition is kept almost constant with charged value at the outlet of the receiver, and it helps the suppression of concentration shift in the cycle.