PERFORMANCE STUDY OF A DOMESTIC REFRIGERATOR POWERED BY A PHOTOVOLTAIC GENERATOR

摘要

A domestic/ office small refrigerator, (110 W) using R-134a refrigerant was used in this study. Thisrnrefrigerator is operated by a photo voltaic generator, which consists of two photovoltaic modules, which arernbuilt for this purpose. The solar system consisted of the following items: the generator, two storage batteries,rna charger regulator and an inverter.The performance of the refrigerator was exhibited in several figuresrnwhere the: power, (P, in W), the capacity, (Cap, in W), and the coefficient of performance, (COP), wererntreated as the dependent parameters. The evaporating temperature, (Te, in ℃) and the condensingrntemperature, (Tc, ℃) were used as the independent parameters. The periods of work termination and workrninitiation due to the condition of the batteries charge were monitored. This was due to power generationrnlimitations of the generator. Periods of energy storage in the batteries and energy extraction off the batteriesrnin both charging and discharging modes were also monitored and analyzed. Experimental results showed thatrnsolar energy system using deep discharge batteries with inverter is an attractive substitute for the mainsrnpower; the performance curves indicated an acceptable performance of the unit. No change in performancernwas noticed for the day long experiment, there were no periods of heating effect to the freezer in offrnoperation conditions.