Experimental investigation on the effect of phase change materils (PCM) in solar compression refrigeration cycle efficiency

Saving energy is one of the most important challenges of today's world. Reducing electrical energy consumption in compressed air systems is one of the essential requirements for designing these systems. When using domestic air conditioners (dual air conditioners) in very hot areas (Khuzestan) their performance decreases and electric current consumption increases. Therefore, the use of new and renewable energies such as solar energy can play a significant role in reducing energy consumption. In this plan, the plane plate solar collector, which contains PCM, is placed in the compressed air compression and condenser refrigeration compression cycle, and by obtaining the parameters of pressure and temperature at different points of the cycle, and comparing it with the ordinary mode The refrigeration cycle (no collector), compressor work, cooling capacity and performance factor are calculated and investigated. In the same way, the data is synchronized in the normal state and in the solar system at three different times (at 7 am, 15 o'clock, and 23 o'clock). The experimental results show that at the maximum temperature (at 15 o'clock), with a rise ( 6.3° C), the refrigerant temperature of the collector output, the thermodynamic characteristics of the improved system, such that the cooling coefficient from 10.82 to 11.21 and the coefficient of cycle performance From 5 to 5.2 was increased by %3.83 and %3.84 and the compressor power was from 167.2 to 160.2 which decreased by about 0.32%. Moreover, due to the lack of adequate sunlight and proper collector heat absorption in the experiments at 23 o'clock and 7 o'clock, there was little effect on the thermodynamic characteristics of the conventional and solar cycles.