چكيده به لاتين
With regard to ascending energy consumption in different aspects of human life and environmental side-effects, finding new solutions for maintaining 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 research plans. In this research, by choosing and investigating hybrid ejector-compression refrigeration system that utilizes clean energy to reduce the electricity demands, efforts have been made to help that goal.
This 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 that have good and bad effects on system performance was chosen. Using GA(Genetic Algorithm), pareto-front curve was made and best answers selected by decision-making methods. Finally, a comparison between this hybrid and conventional systems has been made.
Optimized answers for 1 ton of refrigeration capacity are %41 exergy efficiency and 184 dollars per year. Corresponding decision variables are 10, 27, 46.5 and 80.5 degrees of centigrade for evaporator, intercooler, condenser and generator temperatures. The pump efficiency is %76.5.
