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Metal fiber network materials for compact heat exchangers

Metal fiber network materials for compact heat exchangers
Metal fiber network materials for compact heat exchangers
Compact convective heat exchangers are becoming increasingly important in various areas of applications dealing with micro-devices. Metallic fibre networks are highly porous materials having certain thermal and mechanical characteristics which offer several advantages for heat exchangers. However, optimisation of the material and the structure is subject to several conflicting requirements. A high internal surface area favours rapid heat exchange with the fluid, but may be associated with a relatively low permeability, inhibiting fluid flow. This introduces uncertainty about the optimal scale of the porosity. There are relatively complex interplays between performance, exchanger size and pore (fibre network) architecture. It is difficult to just use experimental data as a guide, and modelling approaches should be explored.
Finding the optimal heat exchanger structure is also complex and challenging due to various constrains. Numerical model is used in the paper to find the dependence of heat exchange performance on fibre network architecture and operating conditions. The paper discusses how the performance of a heat exchanger is affected by its dimensions, heat exchange at fibre surfaces, thermal properties of fibre core, operating temperatures, phenomena on exchanger walls, the core permeability and pumping system characteristics. A simplified analytical model is presented as well, which allows qualitative examinations. The validity of both models is assessed by comparison with experimental data.
Compact heat exchanger, Heat transfer enhancement, Optimization, Metallic fibre network, Pressure drop, Darcy flow, Modelling, Design, Simulation, Comparison, Experiment
397–424
Elsevier Science & Technology Books
Golosnoy, Igor O.
40603f91-7488-49ea-830f-24dd930573d1
Cockburn, Andrew
a6eba7b4-ffa5-4835-96d4-5f0494fac541
Zweben, Carl H.
Beaumont, Peter
Golosnoy, Igor O.
40603f91-7488-49ea-830f-24dd930573d1
Cockburn, Andrew
a6eba7b4-ffa5-4835-96d4-5f0494fac541
Zweben, Carl H.
Beaumont, Peter

Golosnoy, Igor O. and Cockburn, Andrew (2017) Metal fiber network materials for compact heat exchangers. In, Zweben, Carl H. and Beaumont, Peter (eds.) Comprehensive Composite Materials II. 2 ed. Oxford. Elsevier Science & Technology Books, 397–424.

Record type: Book Section

Abstract

Compact convective heat exchangers are becoming increasingly important in various areas of applications dealing with micro-devices. Metallic fibre networks are highly porous materials having certain thermal and mechanical characteristics which offer several advantages for heat exchangers. However, optimisation of the material and the structure is subject to several conflicting requirements. A high internal surface area favours rapid heat exchange with the fluid, but may be associated with a relatively low permeability, inhibiting fluid flow. This introduces uncertainty about the optimal scale of the porosity. There are relatively complex interplays between performance, exchanger size and pore (fibre network) architecture. It is difficult to just use experimental data as a guide, and modelling approaches should be explored.
Finding the optimal heat exchanger structure is also complex and challenging due to various constrains. Numerical model is used in the paper to find the dependence of heat exchange performance on fibre network architecture and operating conditions. The paper discusses how the performance of a heat exchanger is affected by its dimensions, heat exchange at fibre surfaces, thermal properties of fibre core, operating temperatures, phenomena on exchanger walls, the core permeability and pumping system characteristics. A simplified analytical model is presented as well, which allows qualitative examinations. The validity of both models is assessed by comparison with experimental data.

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e-pub ahead of print date: 3 August 2017
Keywords: Compact heat exchanger, Heat transfer enhancement, Optimization, Metallic fibre network, Pressure drop, Darcy flow, Modelling, Design, Simulation, Comparison, Experiment

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Local EPrints ID: 414234
URI: http://eprints.soton.ac.uk/id/eprint/414234
PURE UUID: 3868b050-a2c5-4c9c-92d3-e7a70f9438e4

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Date deposited: 20 Sep 2017 16:31
Last modified: 13 Mar 2019 19:26

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