Investigation of trans-critical CO2 horizontal mini-channel flow with   multi-peak heat transfer behaviors

doi:10.1016/j.anucene.2014.09.001

CORC > 北京大学 > 工学院

	Investigation of trans-critical CO2 horizontal mini-channel flow with multi-peak heat transfer behaviors
	Chen, Lin ; Chen, Yi-Min ; Sun, Meng-He ; Zhang, Xin-Rong
刊名	annals of nuclear energy
	2015
关键词	Trans-critical fluid Mini-channel Carbon dioxide Heat transfer Numerical analysis SUPERCRITICAL CARBON-DIOXIDE NATURAL CIRCULATION LOOP CONVECTIVE FLOW FLUID-FLOW TUBES WATER CYCLE POWER PIPE
DOI	10.1016/j.anucene.2014.09.001
英文摘要	With the fast development of supercritical fluids in chemical engineering, heat transfer and nuclear related applications, supercritical/trans-critical fluid flow inside mini-channels have been a hot topic in recent years. For critical fluids, strong variations of specific fluid properties make it difficult to generalize application correlations or to analyze the dynamic mechanisms. This study first summarized the basic features of previous studies in mini-channel critical flows and then developed a series of numerical analysis into heat transfer characteristics of super-/trans-critical CO2 fluid inside mini-channels. RNG k-epsilon turbulent model is incorporated with Navier-Stoke equation and energy conservation equations in the numerical model. The pressure parameter ranges between 7.4 MPa and 9.0 MPa, while the inlet Reynolds number (Rein) ranges from 1000 to 5000. The heat flux Q varies from 10,000 W/m(2) to 90,000 W/m(2), which covers the common range of various applications. For each case, heat transfer coefficient enhancement is found near the pseudo-critical point, which agrees with previous experimental verifications. For the horizontal flows, multiple peaks of heat transfer coefficients are observed along the channels, which has not been analyzed before. Also in the current study, some attractive relations among channel diameter, inlet Reynolds number, and the heat transfer to trans-critical CO2 flow inside mini-channels are identified and discussed in detail. (C) 2014 Elsevier Ltd. All rights reserved.; Nuclear Science & Technology; SCI(E); EI; 0; ARTICLE; zhxrduph@yahoo.com; 559-569; 75
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/154124]
专题	工学院
推荐引用方式 GB/T 7714	Chen, Lin,Chen, Yi-Min,Sun, Meng-He,et al. Investigation of trans-critical CO2 horizontal mini-channel flow with multi-peak heat transfer behaviors[J]. annals of nuclear energy,2015.
APA	Chen, Lin,Chen, Yi-Min,Sun, Meng-He,&Zhang, Xin-Rong.(2015).Investigation of trans-critical CO2 horizontal mini-channel flow with multi-peak heat transfer behaviors.annals of nuclear energy.
MLA	Chen, Lin,et al."Investigation of trans-critical CO2 horizontal mini-channel flow with multi-peak heat transfer behaviors".annals of nuclear energy (2015).