Modélisation d'une pompe à chaleur industrielle

Abstract

Simulation is a practical means of studying the functioning of industrial compression heat pumps because it provides flexible usage and is economic interest. A mathematical model of an industrial compression heat pump is presented in this article. The different components of this model are the compressor, condenser, evaporator and expansion valve. The model is founded on physical principles. The correlations describing the functioning of each element are employed as often as possible so that one can directly apply this model to different machines. Certain parameters, obtained experimentally, are also used in this model. The characteristics of fluids are calculated from correlations proposed by Martin. The purpose of the model is to simulate the functioning of industrial compression heat pumps and study the influence exerted by modifying characteristics of each component and to understand the interactions between the different components. The model for the compressor is based on the first law of thermodynamics and on the geometry of the compressor. The models for the exchangers are built from correlations representing heat transfer and in taking into account the characteristics of exchangers for industrial heat pumps. The application of the model to an experimental heat pump with a thermal capacity of about 250 kW, installed in our laboratory, has shown that the model gives satisfactory results, not only for each component but also for the heat pump as a whole.