CFD Analysis on Heat Transfer Enhancement of Thermoelectric Generator Heat Exchanger for Low-Grade Heat Power Generation

Muhaammad Yusri Abu Haris,Baljit Singh,Muhammad Fairuz Remeli,Amandeep Oberoi

INTERNATIONAL TRANSACTION JOURNAL of ENGINEERING MANAGEMENT & APPLIED SCIENCES & TECHNOLOGIES（2021）

Univ Teknol MARA Malaysia | Thapar Inst Engn & Technol

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Abstract

This paper covers on computer simulation of waste heat recovery being released from the stack of waste heat boilers in a typical power station. A double pipe heat exchanger with a square inner pipe with thermoelectric generators was used. A series of fin geometry of the heat exchanger (normal fin, staggered square cross-section pin and staggered circular cross-section pin) was analyzed. Water liquid was used as a cold fluid and set as constant at 20 degrees C with 0.02 kg/s throughout this analysis. On the hot fluid side, the temperature was varied from 40 degrees C to 160 degrees C with an increment of 40 degrees C. From the analysis, by introducing turbulence flow, the heat transfer can be increased resulting in increased TEG performance. The maximum electrical powers produced were 29 W and 38 W for square cross-section pin and circular cross-section pin, respectively. Disciplinary: Thermoelectricity; Thermal Engineering and Heat Transfer. (C)2021 INT TRANS J ENG MANAG SCI TECH.

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Key words

Computational Fluid Dynamics (CFD),Thermoelectric generator,Waste Heat,Fin Geometry,Flue-Gas,Heat Exchanger

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