Experimental investigation of CO2 thermosyphon flow and heat transfer in   the supercritical region

doi:10.1016/j.ijheatmasstransfer.2013.03.077

CORC > 北京大学 > 工学院

	Experimental investigation of CO2 thermosyphon flow and heat transfer in the supercritical region
	Chen, Lin ; Deng, Bi-Li ; Zhang, Xin-Rong
刊名	国际传热与传质杂志
	2013
关键词	Thermosyphon Supercritical fluid Carbon dioxide Heat transfer Experiment NATURAL CIRCULATION LOOPS CONVECTIVE FLOW CARBON-DIOXIDE STABILITY SYSTEM FLUIDS INSTABILITIES PERFORMANCE PRESSURE CHANNELS
DOI	10.1016/j.ijheatmasstransfer.2013.03.077
英文摘要	Due to the unique properties of near-critical fluid, trans-critical/supercritical CO2 based natural circulation loop (NCL, or thermosyphon) has been proposed in many energy conversion systems, such as solar heater, waste heat recovery, next generation nuclear cooling, etc. This paper presents an experimental investigation of a near-critical CO2 thermosyphon. The closed thermosyphon is specially designed for high pressure experiments, where natural convection is achieved only by heating and cooling of fluid in the loop. The system is operated in wide range of pressures from around 6.0 to 15.0 MPa in the near-critical region. It is found that the NCL flow will change from unstable sub-critical two-phase flow to stable liquid flow, and then become stable supercritical circulation with the increase of system initial pressure. The heat transfer behaviors are analyzed for stable flow conditions mainly for supercritical region. General variations of the fluid temperature, mass flow rate and loop pressure are presented in this paper. In the steady supercritical region, the heat transfer performance of the cooler show very small changes with bulk mean fluid temperature, and at the heater better heat transfer is found for conditions close to the pseudo-critical point. The heat transfer dependency on operation pressure and evolution mechanisms are also discussed in detail in this paper. (C) 2013 Elsevier Ltd. All rights reserved.; Thermodynamics; Engineering, Mechanical; Mechanics; SCI(E); EI; 10; ARTICLE; 202-211; 64
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/154427]
专题	工学院
推荐引用方式 GB/T 7714	Chen, Lin,Deng, Bi-Li,Zhang, Xin-Rong. Experimental investigation of CO2 thermosyphon flow and heat transfer in the supercritical region[J]. 国际传热与传质杂志,2013.
APA	Chen, Lin,Deng, Bi-Li,&Zhang, Xin-Rong.(2013).Experimental investigation of CO2 thermosyphon flow and heat transfer in the supercritical region.国际传热与传质杂志.
MLA	Chen, Lin,et al."Experimental investigation of CO2 thermosyphon flow and heat transfer in the supercritical region".国际传热与传质杂志 (2013).