Volume 24, Issue 9 (September 2024)                   Modares Mechanical Engineering 2024, 24(9): 583-595 | Back to browse issues page

‎ 10.48311/mme.24.9.583

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Eskandari E, Hajidavalloo E, Saffarian M R, Mohaghegh S, Adibi O. An experimental investigation on the effect of ambient temperature on the performance of a vertical air curtain refrigerator. Modares Mechanical Engineering 2024; 24 (9) :583-595
URL: http://mme.modares.ac.ir/article-15-75111-en.html
An experimental investigation on the effect of ambient temperature on the performance of a vertical air curtain refrigerator
Elham Eskandari1 , Ebrahim Hajidavalloo * 2, Mohammad Reza Saffarian1 , Saeed Mohaghegh3 , Omid Adibi3
1- Shahid Chamran University of Ahvaz
2- Shahid Chamran university , hajidae@scu.ac.ir
3- Niroo research center
Abstract:   (719 Views)
Application of vertical air curtain refrigerators in commercial stores has gained popularity due to easy access of products by the customers. However, energy consumption of these refrigerators is approximately %50 higher than that of refrigerators with doors. This paper experimentally investigates the effect of ambient temperature variation on the performance of these refrigerators. Experimental measurements include parameters such as temperature, pressure, relative humidity, velocity, and power consumption in both air cycle and refrigeration cycle. Moreover, parameters such as compressor power, refrigeration effect, total load, coefficient of performance, pressure ratio, thermal entrainment coefficient, refrigeration capacity, volumetric and mass flow rates of air in the evaporator and condenser, refrigerant mass flow rate, condenser heat, air curtain thermal efficiency, Richardson number, Reynolds number, and deviation modulus under different ambient conditions were calculated. The experimental results show that the refrigeration performance is affected by ambient air temperature, which directly influence on the infiltration rate of ambient air into the refrigerator compartment and on the return air temperature to the evaporator. Therefore, the return air temperature is crucial indicator for assessing the efficiency of the refrigerator. With increasing ambient temperature, compressor power increases, while the refrigeration effect and COP decrease. The results also indicate that as ambient temperature rises, air curtain efficiency decreases somehow that temperature difference between front and rear of the shelves may reach up to 4.6°C. For every 1°C increase in ambient temperature, compressor power consumption increases by approximately %0.64, while refrigeration effect and COP decrease by %0.06 and %1.77, respectively
Keywords: Air-Curtain Refrigerator, Experimental Stud, Energy Consumption, Coefficient of Performance
Full-Text [PDF 1808 kb]   (609 Downloads)    
Article Type: Original Research | Subject: Plumbing & Air Conditioning
Received: 2024/05/13 | Accepted: 2024/12/5 | Published: 2024/08/31
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