The Experimental Investigation of the Transient Regime of Solar Electric-Vapor Compression Refrigeration Systems under Desert Weather Conditions

Hot and dry environments may adversely affect the efficiency and performance of vapor compression refrigeration systems, increasing energy consumption and operating challenges.This experimental investigation examines the thermodynamic aspects of solar electric-vapor compression refrigeration systems built in southwest Algeria's ADRAR province's climate.For this, a reliable monitoring and recording device on the testing bench records one-minute data intervals.An example assessment on a sample test day in July 2023.At 2:05 PM, the outdoor weather was 49.4℃, 1-3% RH, and 1020 w/m 2 global solar GHI, coinciding with high cooling requirements.About 100 kg of tomatoes is introduced into storage space at 11:16 AM with a thermostat setting at 8-12℃.In the first transient regime, the results indicate that the compressor functions at 25 bar with a compression ratio of about 5 for 67 minutes.The store's chill temperature is reduced to 15℃, whereas the internal relative humidity is between 70% and 90%.The condensation temperature and pressure are high, so the distributions are within the manufacturer's limit.These circumstances enable refrigeration unit efficiency to approach an average COP value of 1.08.The high irreversibility between indoor and outdoor environments frequently impacts expansion and evaporation temperatures.In contrast, with a recommended choice of specific technical criteria, this solar PV refrigeration facility is an alternate sustainable solution for unreliable or distant grids and remote Saharan farmlands.