High efficiency high temperature heat extraction from porous media reciprocal flow burner: Time-averaged model

•High temperature heat extraction from a porous reciprocal flow burner is studied.•A fast 1-D time-averaged model is developed for parametric studies.•The heat extraction efficiencies above 90% are predicted after optimization. The high temperature heat extraction from a porous media reciprocal flow...

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Bibliographic Details
Published in:Applied thermal engineering 2018-10, Vol.143, p.614-620
Main Authors: Yao, Zhaoxi, Saveliev, Alexei V.
Format: Article
Language:English
Subjects:
Efficiency
Energy efficiency
Engines
Filtration combustion
Heat extraction
Heat transfer
Heat treatment
Mathematical models
Porous materials
Porous media
Stirling engines
Thermal energy
Thermoelectric generators
Turbines
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Summary:•High temperature heat extraction from a porous reciprocal flow burner is studied.•A fast 1-D time-averaged model is developed for parametric studies.•The heat extraction efficiencies above 90% are predicted after optimization. The high temperature heat extraction from a porous media reciprocal flow burner (RFB) is studied numerically. In RFB, the air/fuel mixture flow direction is switched periodically to contain and sustain combustion. High temperature heat extraction is essential for the efficient operation of small electrical and thermal systems based on thermoelectric generators, Stirling engines and micro-turbines. In this paper, the efficiency of the heat extraction is studied for different extraction locations, temperatures and equivalence ratios. An 1-D time-averaged model is developed and validated to represent a RFB and to further predict the behavior of the burner. Optimization on the burner’s geometry is also performed to increase the heat extraction efficiency.
ISSN:1359-4311
1873-5606
DOI:10.1016/j.applthermaleng.2018.07.144