Experimental comparison of internal and external condensers effect on the energy consumption of household refrigerators


Department of Mechanical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran



The purpose of this study is to evaluate the impact of moving the condenser of a household refrigerator within the body on the refrigerator's performance and energy consumption. The effects of the internal and external condensers on energy consumption and cooling capacity in a household refrigerator are next explored. This study was conducted experimentally and in a laboratory setting, and all terms and conditions were in accordance with the international electrotechnical commission 62552-2015 for cooling system testing. The studies were conducted in a 5-foot refrigerator. On this refrigerator, both internal and external condenser models were installed. In the first situation, the internal condenser was inserted into the cooling cycle and the associated tests and calculations were performed. In the other situation, the internal condenser was removed from the cooling cycle and the external condenser was replaced by changing the valve status. In this case, the relevant diagrams and calculations were obtained and analyzed. Based on the findings of this study, it can be stated that using the internal condenser reduces energy consumption and, as a result, has a higher energy grade than using the external condenser. The internal condenser in the heat transfer process work better than the external condenser, based on the temperatures obtained. An internal condenser is also a preferable solution for a household refrigerator in terms of installation and cost.


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