Investigation du cycle de réfrigération à éjecto-compression et ses applications dans le froid , le chaud et l'énergie

Abstract

Vapour ejector refrigeration has become a topic of interest for research in recent years for the reasons that it is a heat-operated system utilizing low-grade energy; waste heat from industrial process, etc., a computer code based on one dimensional ejector theory is written to analyze performance of the ejector. The code dresses effects of friction at the constant area mixing chamber. The effects of critical entrainment ratio are studied. The influence of tree major parameters: generator, condenser and evaporator temperature, on coefficient of performance is discussed. The design conditions were generator temperature (62-87°C), condenser (24 - 36°C) and evaporator temperature (0-12°C). Comparison of performance of ejector with 5 refrigerants, R134a, R152a, R290, R600a, and R717 is made

Thesis