ライブラリ登録: Guest
Begell Digital Portal Begellデジタルライブラリー 電子書籍 ジャーナル 参考文献と会報 リサーチ集
Journal of Enhanced Heat Transfer
インパクトファクター: 0.562 5年インパクトファクター: 0.605 SJR: 0.211 SNIP: 0.361 CiteScore™: 0.33

ISSN 印刷: 1065-5131
ISSN オンライン: 1026-5511

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v4.i1.20
pages 7-15

Error in Lumped Parameter Analysis of Heat Flow Rate Through Extended Surfaces Accounting for Thermal Contact Resistance

J. Deng
lstituto di Fisica Tecnica-Università degli Studi di Bologna Viale del Risorgimento, 2-40136 Bologna, Italy
G. Pagliarini
Dipartimento di Ingegneria Industriale-Università di Parma Viale delle Scienze, 43100 Parma, Italy
S. Salvigni
lstituto di Fisica Tecnica-Università degli Studi di Bologna Viale del Risorgimento, 2-40136 Bologna, Italy

要約

In order to predict the heat flow rate through extended surfaces, the thermal problem is frequently schematized by lumped parameter models based on the thermal resistance concept or one-dimensional analysis. However, some error is inherent in this idealization because it neglects the heat flux between the finned and the unfinned portions of the wall. In this paper the results given by two lumped parameter models, the series model and the parallel model, are compared with an analytical solution obtained by applying the series truncation method to the true two-dimensional problem. The results show that the parallel model is completely unsatisfactory while the series model gives an acceptable overestimate of the heat flow rate. The last conclusion is particularly true for inhomogeneous wall and fin because a thermal contact resistance between the fin base and the wall reduces the relative error of the lumped parameter model.


Articles with similar content:

Air Coolers for Indirect Refrigeration Systems
International Heat Transfer Conference 10, Vol.11, 1994, issue
C. Infante Ferreira, J. Fernandez , C. M. Kalker-Kalkman, X. Aginagalde
THERMAL EFFICIENCY AND THE OPTIMUM SIZES OF FINNED SURFACES WITH COATING
International Heat Transfer Conference 13, Vol.0, 2006, issue
V. G. Gorobets
Applications of s-FEM to the Problems of Composite Materials with Initial Strain-Like Terms
International Journal for Multiscale Computational Engineering, Vol.4, 2006, issue 4
Teppei Wakatsuki, Satoyuki Tanaka, Hiroshi Okada, Yoshimi Watanabe
The Algorithm of Statistical Global Optimization with Search Step Adaptation
Journal of Automation and Information Sciences, Vol.32, 2000, issue 1
Vasiliy R. Dzhala
AN EFFICIENT ANALYTICAL SOLUTION STRATEGY FOR MULTIDIMENSIONAL HEAT CONDUCTION PROBLEMS
Heat Transfer Research, Vol.45, 2014, issue 3
Mohammad Asif