Flow patterns and heat transfer in a square cross-section micro condenser working at low mass flux

Achkar, Georges El; Miscevic, Marc; Lavieille, Pascal; Lluc, Jacques; Hugon, J.

doi:10.1016/j.applthermaleng.2012.11.036

Cited by 14 publications

(2 citation statements)

References 35 publications

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“…The study measured condensation heat transfer coefficients and two-phase pressure drop across saturation temperatures of 30 and 40 • C, with mass fluxes ranging from 300 to 600 kg/m 2 s and vapour qualities between 0.1 and 0.9. El Achkar [54] conducted an examination of flow patterns and heat transfer dynamics during the condensation process of n-pentane in an air-cooled micro-condenser with a square cross-section. Their experimental setup comprised a borosilicate square microchannel, featuring inner and outer edges measuring 553 mm and 675 mm, respectively, and a length of 208 mm.…”

Section: Experimental Studies Focused On Mini/microchannel Condensati...mentioning

confidence: 99%

Condensation Flow of Refrigerants Inside Mini and Microchannels: A Review

Başaran,

Benim

2024

Applied Sciences

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Nowadays, the demand for obtaining high heat flux values in small volumes has increased with the development of technology. Condensing flow inside mini- and microchannels has been becoming a promising solution for refrigeration, HVAC, air-conditioning, heat pumps, heat pipes, and electronic cooling applications. In these applications, employing mini/microchannels in the condenser design results in the working fluid, generally refrigerant, undergoing a phase change inside the mini/microchannels. On the other hand, the reduction in the hydraulic diameter during condensation gives rise to different flow regimes and heat transfer mechanisms in the mini- and microchannels compared to the conventional channels. Therefore, the understanding of fluid flow and heat transfer characteristics during condensation of refrigerant inside mini- and microchannels has been gaining importance in terms of condenser design. This study presents a state-of-the-art review of condensation studies on refrigerants inside mini- and microchannels. The review includes experimental studies as well as correlation models, which are developed to predict condensation heat transfer coefficients and pressure drop. The refrigerant type, thermodynamical performance, and compatibility, as well as the environmental effects of refrigerant, play a decisive role in the design of refrigeration systems. Therefore, the environmental impacts of refrigerants and current regulations against them are also discussed in the present review.

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Section: Experimental Studies Focused On Mini/microchannel Condensati...mentioning

confidence: 99%

Condensation Flow of Refrigerants Inside Mini and Microchannels: A Review

Başaran,

Benim

2024

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…El Achkar et al [104] investigated flow patterns and heat trans fer during condensation of n-pentane in an air-cooled square cross section microcondenser. The test section consisted of a borosilicate square microchannel, of inner and outer edges 553 pm and 675 pm, respectively, and of a length 208 mm.…”

Section: For Laminar Liquid-turbulent Vapor Flow (Re! < 2000 and Reg mentioning

confidence: 99%

A Critical Review on Condensation Heat Transfer in Microchannels and Minichannels

Awad

Dalkılıç

Wongwises

2014

Journal of Nanotechnology in Engineering and Medicine

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A C ritical R eview on C ondensation H eat T ran sfer in M icro ch an n els and M in ic h a n n e lsCondensation in microchannels and minichannels is widely used in small devices such as air-cooled condensers for the air-conditioning and automotive industry, in heat pipes, thermosyphons and other applications for system thermal control. Currently, many research centers all over the world are dealing with the structure and operation of com pact refrigerating devices. This is in line with the trend of 21st century that is moving towards the use of energy-saving and environmentally friendly technical equipment. In the present study, a critical review on condensation heat transfer in microchannels and minichannels is presented. This review include a wide range of different parameters such as the channel diameter (d), the saturation temperature (Ts), the mass flux (G), the vapor quality (x), different working fluids like steam, C02 or R744, FC72, R22, R410A, and R407C, various shapes such as circular and noncircular, different orientations like hori zontal and vertical, and systems consist o f either single or multiple channels. At the end, recommendations for future studies will be given. As a result, this paper cannot only be used as the starting point for the researcher interested in condensation heat transfer in microchannels and minichannels, but it also includes recommendations for future studies on condensation heat transfer in microchannels and minichannels.

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Experimental Investigation and Visualization Study of the Condensation Characteristics in a Propylene Loop Heat Pipe

Yan

et al. 2021

J. Therm. Sci.

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Flow patterns and heat transfer in a square cross-section micro condenser working at low mass flux

Cited by 14 publications

References 35 publications

Condensation Flow of Refrigerants Inside Mini and Microchannels: A Review

Condensation Flow of Refrigerants Inside Mini and Microchannels: A Review

A Critical Review on Condensation Heat Transfer in Microchannels and Minichannels

Experimental Investigation and Visualization Study of the Condensation Characteristics in a Propylene Loop Heat Pipe

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