چكيده به لاتين
With regard to ascending energy consumption in different aspects of human life and environmental side-effects, finding new solutions for fixing human needs e.g. refrigeration and air-conditioning, which first of all, solve the present problems and the second be economically feasible, is in the researches plans.in this research,ejector-compression refrigeration cycle has been selected.this system utilizes wasting available energies in different industries and clean energies same as solar energy to reduce the electricity demand which uses in compression systems and studying Hybrid system have been made to help that goal.
The desired hybrid system has been modelled by using energy and mass conservation laws and control-volume point-of-view. Exergy, economical and environmental aspects of this system was considered by using exergy balance equation and cost and penalty functions. Exergy efficiency and TAC (Total Annual Costs), which are very important in techno-economical studies, are examined in this research. After finding the effects of different operational parameters, the parameters with dual effects on system performance which need optimization was chosen. Using GA(Genetic Algorithm), pareto-front curve was made and best answers selected by decision-making methods. In the present study, the method of obtaining the full dimensions of an ejector is given according to the refrigeration tone considered in the hybrid system. Also, using existing software, modeling ejector and flow pattern inside the ejector are studied and, in other words, the performance of the ejector is examined.
Optimized answer for 1 ton of refrigeration capacity are %26 exergy efficiency and 179 dollars per year. Corresponding decision variables are 10, 27.5, 35 and 95 degrees of centigrade for evaporator, intercooler, condenser and generator temperatures.
Keywords: Hybrid Ejector-Compression Refrigeration System, 2-Objective Optimization, Exergy Efficiency and Total Annual Costs, Modelling of Ejector, View the flow pattern inside the ejector and check its proper functioning.
