Experimental investigation of the defrosting process on domestic refrigerator finned tube evaporators
Küçük Resim Yok
Tarih
2012
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Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Frost formation is an important problem for household refrigerator and air conditioning equipment manufacturers. When frost accumulates on the evaporator surface, it acts as a thermal insulator and reduces heat flow. Therefore, frost negatively affects evaporator performance. The purpose of this study is to decrease energy consumption and increase the efficiency of the defrosting process. In the first part of the experiment, frost formation on a no-frost refrigerator evaporator at real operating conditions was investigated. The ambient temperature was maintained at a constant 23°C. It was observed that when the evaporation temperature reaches -35°C, the frost formation on the evaporator exhibits a rather dense structure that is unlike the needle-type structure observed at higher temperatures. In the second part of the experiment, the defrosting process was observed with an endoscopic camera, and the initial melting points were investigated. The experiment revealed that although the heater density is higher on the lower rows, the frost on the higher rows of the evaporator melts faster. On the theoretical side, we prepared an analytical model that calculates the melting time of the frost on the fin. The experimental and theoretical results are within 5%. © 2012 Copyright Taylor and Francis Group, LLC.
Açıklama
Anahtar Kelimeler
Kaynak
Heat Transfer Engineering
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
33
Sayı
6
