Abstract
Many studies have been conducted for jet ejectors used in the recovery of solar energy or for their use in refrigeration systems for various industrial applications. Generally, these types of ejectors are using water as the working fluid because water have a low cost, a chemical stability and is safe to use. Naturally, other refrigerants, with large-scale application for industry, can be used. In such a type of jet ejector, besides selection of the refrigerant, the design of ejector is very important, with strongly influence to the performance, because the compression ratio depends on the geometry of the nozzle and on the geometry of the diffuser. Compared to other refrigeration systems, those with ejector have some advantages: simplicity in construction, high liability and low cost. However, it has a coefficient of performance lower than conventional systems, this limited the widespread application of ejector refrigeration systems.
Highlights
Researchers have tried to find a wider application of jet ejector systems, in refrigeration and air conditioning applications by using reduced amounts of thermal energy, such as that resulting from solar energy and waste heat of various industrial processes [1]
The condense is divided in two parts: one part is pumped back to the generator, the other part flows through the expansion vessel and enters into the evaporator, the vapor flows again through the jet ejector is ended a refrigeration cycle system [5]
In this paper we propose to analyze the process from inside the jet ejector in term to optimize its geometry parameters by analyzing the variation of working fluid flow parameters from inside, entire behavior from the inlet to the ejector outlet
Summary
Researchers have tried to find a wider application of jet ejector systems, in refrigeration and air conditioning applications by using reduced amounts of thermal energy, such as that resulting from solar energy and waste heat of various industrial processes [1]. Some studies have shown that by using a variable geometry of the ejectors may achieve a high performance thereof in different operating conditions. One such refrigeration system with jet ejector consists of: pressure generator, evaporator, condenser, expansion vessel, jet ejector and a circulation pump [2, 3]. In this system, the fluid with a high pressure which comes from the generator passes through the fluid jet ejector and drives the fluid with low pressure coming from the evaporator. In this paper we propose to analyze the process from inside the jet ejector in term to optimize its geometry parameters by analyzing the variation of working fluid flow parameters from inside, entire behavior from the inlet to the ejector outlet
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