An experimental study on the frost formation over a flat plate: Effect of frosting on heat transfer

Name: An experimental study on the frost formation over a flat plate: Effect of frosting on heat transfer
Author: Saygın, Alper, Başol, Altuğ Melik, Arık, Mehmet

İsim	An experimental study on the frost formation over a flat plate: Effect of frosting on heat transfer
Yazar	Saygın, Alper, Başol, Altuğ Melik, Arık, Mehmet
Basım Tarihi:	2023-06-01
Basım Yeri	- Elsevier
Konu	Cold plate, Forced convection, Frost thermal resistance, Frost thickness, Heat flux
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	0894-1777
Kayıt Numarası	81a04959-c3b9-4a14-b709-9057b2f9364d
Lokasyon	Mechanical Engineering
Tarih	2023-06-01
Notlar	TÜBİTAK
Örnek Metin	Frost accumulation on cooled surfaces generates thermal barrier between the surface and air. Apart from the frost layer thickness, the thermal properties of the frost also affect its heat transfer characteristics. In this experimental study, the effect of the frosting on heat transfer is investigated at different cold surface temperatures and at different air velocities in a closed loop wind tunnel. A large number of experiments is performed by altering the parameters of free stream air velocity, relative humidity, and cold plate temperature. Frost layer impact on heat transfer rate is measured through a high precision thin film heat flux sensor for 60 min. Accordingly, heat flow was significantly obstructed due to frosting. The rate of diminishment in the heat flux was not found to be constant over time but shows a decreasing trend. Furthermore, an enhancement on the heat transfer was reported during the early stage of frost formation under certain environmental conditions, majorly due to the increase in effective heat transfer area induced by ice crystals and corresponding increase in latent heat generation. The densification of the frost layer and its effect on the total thermal resistance was discussed. Based on the convective heat and mass transfer balance over the frost layer, frost surface temperature was predicted. Lastly, a correlation for estimating the heat transfer decrease during frosting is proposed via non dimensional numbers.
DOI	10.1016/j.expthermflusci.2023.110862
Cilt	144

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An experimental study on the frost formation over a flat plate: Effect of frosting on heat transfer

Yazar Saygın, Alper, Başol, Altuğ Melik, Arık, Mehmet

Basım Tarihi 2023-06-01

Basım Yeri - Elsevier

Konu Cold plate, Forced convection, Frost thermal resistance, Frost thickness, Heat flux

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 0894-1777

Kayıt Numarası 81a04959-c3b9-4a14-b709-9057b2f9364d

Lokasyon Mechanical Engineering

Tarih 2023-06-01

Notlar TÜBİTAK

Örnek Metin Frost accumulation on cooled surfaces generates thermal barrier between the surface and air. Apart from the frost layer thickness, the thermal properties of the frost also affect its heat transfer characteristics. In this experimental study, the effect of the frosting on heat transfer is investigated at different cold surface temperatures and at different air velocities in a closed loop wind tunnel. A large number of experiments is performed by altering the parameters of free stream air velocity, relative humidity, and cold plate temperature. Frost layer impact on heat transfer rate is measured through a high precision thin film heat flux sensor for 60 min. Accordingly, heat flow was significantly obstructed due to frosting. The rate of diminishment in the heat flux was not found to be constant over time but shows a decreasing trend. Furthermore, an enhancement on the heat transfer was reported during the early stage of frost formation under certain environmental conditions, majorly due to the increase in effective heat transfer area induced by ice crystals and corresponding increase in latent heat generation. The densification of the frost layer and its effect on the total thermal resistance was discussed. Based on the convective heat and mass transfer balance over the frost layer, frost surface temperature was predicted. Lastly, a correlation for estimating the heat transfer decrease during frosting is proposed via non dimensional numbers.

DOI 10.1016/j.expthermflusci.2023.110862

Cilt 144