Steady-state simulation of heat pump using milk pasteurization

Abstract

A simulation model to determine the steady- steady performance of heat pump for specified milk temperatures both source and sink medium and component sizes has been developed. Simple mathematical models were employed for each component of the milk to milk heat pump system with a plate economizer. They resulted in a set of nonlinear equations, which was solved numerically. This simulation program is based on a mathematical model of the thermodynamic cycle and on experimental data from equipment testing. The predicted performance was compared to the experimental result used that of an existing R-114 unit, showing good agreement. As an application, a comparative analysis is made on the thermodynamic performance of a heat pump using milk pasteurization on two different refrigerants: R-114 and R-134a. Although according that same temperature of pasteurization milk discharge pressure ratio of heat pump compressor is to be very high level for R-134a, the predicted model with R-134a was shown that it was been applicable to heat pump system using milk pasteurization.