Heat Transfer Effectiveness of Three-Fluid Separated Heat Pipe Exchanger

• Published in: Journal of thermal science Vol. 20; no. 1; pp. 64 - 69
• Main Authors: Shi, Chengming, Wang, Yang, Yang, Ying, Liao, Quan
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.01.2011
• Subjects: Classical and Continuum Physics; Engineering Fluid Dynamics; Engineering Thermodynamics; Heat and Mass Transfer; Physics; Physics and Astronomy; 交换矩阵; 传热效能; 传热模型; 传热面积; 传递矩阵; 分离式热管换热器; 温度变送器; 热流体; temperature transfer matrix; heat transfer effectiveness; heat pipes; three-fluid heat exchangers
• ISSN: 1003-2169; 1993-033X
• DOI: 10.1007/s11630-011-0436-y

A heat transfer model for three-fluid separated heat pipe exchanger was analyzed,and the temperature transfer matrix for general three-fluid separated heat exchanger working in parallel-flow or counter-flow mode was obtained.It was found that the forms of temperature transfer matrix are similar for heat pipe rows with equal or different heat transfer surface area.Furthermore,by using the temperature transfer matrix of the heat pipe exchanger,the relationship between heat transfer effectiveness θ 1,θ 2 and M,NTU,U,Δt i were derived for the exchanger operating in parallel-flow or counter-flow mode,and a simple special example was adopted to demonstrate the correctness of these relationships.