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Adaptive defrost methods for improving defrosting efficiency of household refrigerator

Title
Adaptive defrost methods for improving defrosting efficiency of household refrigerator
Author
이관수
Keywords
Defrost; Heater; Refrigerator; Efficiency
Issue Date
2018-02
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ENERGY CONVERSION AND MANAGEMENT, v. 157, page. 511-516
Abstract
The defrosting method of the conventional household refrigerator increases freezer temperature during the defrosting operation, and defrosting efficiency reduces because the heater consumes more power than the amount of frost on the surface of the heat exchanger. To solve this problem, three defrost heater control methods, applicable to refrigerators equipped with conduction and radiation heaters, are being proposed. The control methods were classified as a method of simultaneously pulsating two heaters, method of individually pulsating two heaters, and method of step-by-step reduction of radiation heater power. The operation effect of each heater on freezer temperature was analyzed. For the three methods, a heater control optimization process was performed to reduce the temperature increase in the freezer. The power consumed by the heater was minimized and defrosting efficiency improved. The Best performance was observed when two heaters pulsated individually. For this method, the variation in freezer temperature, between before and after the defrost process, was reduced from approximately 11 degrees C to 5 degrees C. Additionally, the defrosting efficiency improved by 15%.
URI
https://www.sciencedirect.com/science/article/pii/S0196890417311901?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/117572
ISSN
0196-8904; 1879-2227
DOI
10.1016/j.enconman.2017.12.039
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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