A numerical model of thermal analysis for woven wire screen matrix heat exchanger

Abstract Woven wire screen matrix heat exchanger (WSMHE) is a kind of compact, light-weight and high-efficiency matrix heat exchanger (MHE) for cryogenic applications. This paper presented a numerical model for the design and thermal analysis of WSMHE. The influence of wall thermal resistance, axial conduction, parasitic heat load and properties variation was taken into account, which is neglected in the traditional effectiveness–NTU method but important for compact cryogenic heat exchangers. The proposed numerical method is verified by effectiveness–NTU method under specific conditions, then it is tested according to experiment data, and a well agreement was obtained. Based on this model, a detailed analysis was performed on WSMHEs. The analysis results show that the axial conduction might result in evident decrease of effectiveness at low flow rate region; the effectiveness of WSMHEs with large flow rate could be remarkably enhanced by increasing its length; the influence of parasitic heat load varied little throughout of the flow rate region. Furthermore, the numerical model presented in this paper can be developed to the design and thermal analysis of small partition wall type heat exchangers.

[1]  G. P. Peterson,et al.  The effective thermal conductivity of wire screen , 2006 .

[2]  S. J. Kline,et al.  Describing Uncertainties in Single-Sample Experiments , 1953 .

[4]  G. Venkatarathnam,et al.  Optimization of Matrix Heat Exchanger Geometry , 2000 .

[5]  G. Venkatarathnam,et al.  Transient response of perforated plate matrix heat exchangers , 1998 .

[6]  Experimental Analysis of Heat Transfer Characteristics and Pressure Drop through Screen Regenerative Heat Exchangers , 1995 .

[7]  Won Soon Chang,et al.  Porosity and Effective Thermal Conductivity of Wire Screens , 1990 .

[8]  Gadhiraju Venkatarathnam,et al.  Matrix heat exchangers and their application in cryogenic systems , 1990 .

[9]  Michael J. Nilles,et al.  Heat transfer and flow friction in perforated plate heat exchangers , 1995 .

[10]  P. Cheng,et al.  Oscillatory pressure drops through a woven-screen packed column subjected to a cyclic flow , 1996 .

[11]  G. Venkatarathnam.  Effectiveness-Ntu relationship in perforated plate matrix heat exchangers , 1996 .

[12]  Howard P. Hodson,et al.  On the thermal performance of wire-screen meshes as heat exchanger material , 2007 .

[13]  Richard A. Wirtz,et al.  Thermal/fluid characteristics of isotropic plain-weave screen laminates as heat exchange surfaces , 2002 .

[14]  B. Sahin,et al.  Thermal performance analysis and optimum design parameters of heat exchanger having perforated pin fins , 2008 .

[15]  W. Hsieh,et al.  Measurement and correlation of hydraulic resistance of flow through woven metal screens , 2005 .

[16]  Gregory Nellis,et al.  A heat exchanger model that includes axial conduction, parasitic heat loads, and property variations , 2003 .

[17]  R. Fleming.  A Compact Perforated-Plate Heat Exchanger , 1969 .