Energy Consumption Optimization of Household Refrigerator-Freezer with Parallel Two-Stage Compression

In this paper, the energy consumption of the household refrigerator-freezer is optimized using the parallel two-stage compression (PTC) cycle. It also examines how a household refrigerator-freezer works during power connection and controls it. The equipment used in the refrigerator-freezer cycle includes a variable speed compressor, condenser, three-way valve, expansion valve, fresh food compartment evaporator (FFCE) and freezer compartment evaporator (FZCE). R۶۰۰a refrigerant is used in the refrigerator-freezer cycle. Refrigerator-freezer is tested in the refrigerator-freezer laboratory with an ambient temperature of ۲۵ °C. IEC ۶۲۵۵۲-۲۰۱۵ international standard is used for performance evaluation. So far, various applied technologies have been implemented to reduce energy consumption and the refrigeration cycle with a PTC has been reported as the latest technology used in refrigerator-freezer to reduce energy consumption. According to different tests and control methods, the priority is the temperature of the fresh food compartment (FFC) and then the freezer compartment (FZC). According to the relevant standard, the energy consumption of this refrigerator-freezer is equal to ۳۲۰ kWh/ year, which provides an energy consumption grade of A+ +. Experimental results show that the PTC cycle can reduce the energy consumption of refrigerator-freezer by up to ۲۰% compared to other circuits

کلیدواژه ها:

Household refrigerator-freezer ، Parallel two-stage compression ، Energy consumption optimization