A refined design method for precoolers with consideration of multi-parameter variations based on low-dimensional analysis

Li, Hui; Zou, Zhengping; Liu, Yu Min

doi:10.1016/j.cja.2021.08.031

Cited by 12 publications

(1 citation statement)

References 34 publications

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“…With the improvement of manufacturing technology and heat transfer enhancement technology, various new types of microchannel heat exchanger configurations have been proposed and widely applied in many fields, as shown in Figure 1, including nuclear energy [3,4], solar thermal [5], molten salt fuel cells [6,7], microelectronic micro-mechanical systems [8,9], automotive cooling systems [10,11], aerospace (active regenerative cooling systems, precooled propulsion systems, etc.) [12][13][14][15][16][17][18][19][20][21], and so on. The working state of compact heat exchangers can be attributed to the physical process of microscale flow and heat transfer.…”

Section: Introductionmentioning

confidence: 99%

A Review of the Complex Flow and Heat Transfer Characteristics in Microchannels

Zhang

Zou

2023

Micromachines

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Continuously improving heat transfer efficiency is one of the important goals in the field of energy. Compact heat exchangers characterized by microscale flow and heat transfer have successfully provided solutions for this purpose. However, as the characteristic scale of the channels decreases, the flow and heat transfer characteristics may differ from those at the conventional scale. When considering the influence of scale effects and changes in special fluid properties, the flow and heat transfer process becomes more complex. The conclusions of the relevant studies have not been unified, and there are even disagreements on some aspects. Therefore, further research is needed to obtain a sufficient understanding of flow structure and heat transfer mechanisms in microchannels. This article systematically reviews the research about microscale flow and heat transfer, focusing on the flow and heat transfer mechanisms in microchannels, which is elaborated in the following two perspectives: one is the microscale single-phase flow and heat transfer that only considers the influence of scale effects, the other is the special heat transfer phenomena brought about by the coupling of microscale flow with special fluids (fluid with phase change (pseudophase change)). The microscale flow and heat transfer mechanisms under the influence of multiple factors, including scale effects (such as rarefaction, surface roughness, axial heat conduction, and compressibility) and special fluids, are investigated, which can meet the specific needs for the design of various microscale heat exchangers.

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