Experimental study of frost formation on a fin-and-tube heat exchanger by natural convection

Amini, Mohammad Reza; Pishevar, Ahmadreza; Yaghoubi, M.

doi:10.1016/j.ijrefrig.2014.06.015

Cited by 31 publications

(3 citation statements)

References 17 publications

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“…As shown, the atmospheric pressure plays a significant role in the frost morphology during frost formation process, especially the shape of frost crystal. The previous studies [4,25] on frost properties have pointed out the frost crystal are mainly dependent on water vapor concentration gradient and cold surface temperature. Since the cold surface temperature is the same, the variation of atmospheric pressure is manifested in the change of water vapor concentration gradient in air.…”

Section: Effect Of Atmospheric Pressure On Frost Growthmentioning

confidence: 99%

Experimental study on frost formation on a cold surface in low atmospheric pressure

Chen

Shen

et al. 2015

Applied Thermal Engineering

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Section: Effect Of Atmospheric Pressure On Frost Growthmentioning

confidence: 99%

Experimental study on frost formation on a cold surface in low atmospheric pressure

Chen

Shen

et al. 2015

Applied Thermal Engineering

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“…Getu and Bansal [11] developed new frost property correlations that predict frost layer thickness, density, thermal conductivity, and air-pressure drops. Amini et al [12] studied the frosting of fin-and-tube heat exchangers under natural convection for refrigerant mean temperatures of −20 • C, −15 • C, and −10 • C; ambient temperatures ranging from 20 • C to 30 • C; and air humidity from 50% to 70%. The authors observed that the air flow between compact fins is negligible as frost only formed on the tips of the fins, whilst the tubes and fins remained clean.…”

Section: Introductionmentioning

confidence: 99%

Image-Analysis-Based Approach for Identification of Air Cooler Heat Transfer Degradation during Frosting Process

et al. 2022

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Fin-and-tube heat exchangers have been extensively used in many fields, especially in heat, ventilation, air-conditioning, and refrigeration systems. In the case of the operation of a fin-and-tube heat exchanger as an air cooler, frost formation is an important effect that should be taken into account. The frost accumulation process is undesirable since it deteriorates heat transfer due to the insulation of the frost layer as well as causing excessive pressure loss. The analysis of the effect of the frosting process on a fin-and-tube air cooler performance is presented in this paper. Based on long-term experimental investigations applied to the air cooler in a cold storage chamber, the general degradation of the heat exchanger performance is discussed. The influence of frost on the cooling capacity, by-pass factor, and thermal resistance is analysed. The temperature distribution of the air passing through the air cooler before and after the defrosting process is presented and discussed. A method for the assessment of the amount of frost formed at the air cooler surface, based on visualisation of the air cooler during operation and synchronised with the thermal measurements, is developed. The results show that the frosting process causes deterioration of the cooling capacity by up to 40% in the analysed case. Correlation is demonstrated between frost formation and heat transfer degradation in the air cooler.

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“…Water-repellent materials are under a very wide range of promising applications in various low-temperature environments and equipment. Amini et al [7] investigated a mathematical model of the natural convective frost layer in heat exchangers and developed a workable empirical relationship equation for frost formation. Chen et al [8] proposed a DLA-based planar fractal model for simulating the formation and growth of frost.…”

mentioning

confidence: 99%

Visualization of cold surface frosting

Xia

et al. 2023

J. Phys.: Conf. Ser.

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The frosting has a profound impact on heat transfer. The surface frosting makes heat transfer difficult and reduces heat transfer efficiency. Therefore, it is particularly important to study anti freezing methods and measures. In this paper, based on the constant temperature and humidity visualization system, the freezing process and frosting process of water droplets on the bare aluminium surface, hydrophilic coating surface, and hydrophobic coating surface were observed by Rising View and MATLAB. The thickness of frost, the freezing radius of water droplets, the morphology of ice crystals, and the coverage rate of water droplets were compared. Finally, the effect of different coatings on inhibiting frosting was analysed quantitatively and theoretically.

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Experimental study of frost formation on a fin-and-tube heat exchanger by natural convection

Cited by 31 publications

References 17 publications

Experimental study on frost formation on a cold surface in low atmospheric pressure

Experimental study on frost formation on a cold surface in low atmospheric pressure

Image-Analysis-Based Approach for Identification of Air Cooler Heat Transfer Degradation during Frosting Process

Visualization of cold surface frosting

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