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research-article

EFFECT OF LONGITUDINAL VORTEX GENERATOR LOCATION ON THERMOELECTRIC- HYDRAULIC PERFORMANCE OF A SINGLESTAGE INTEGRATED THERMOELECTRIC POWER GENERATOR

[+] Author and Article Information
Samruddhi Deshpande

Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061
sdesh@vt.edu

Bharath Viswanath Ravi

Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061
bharvish@vt.edu

Jaideep Pandit

Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061
jpandit@vt.edu

Ting Ma

Department of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049
mating715@mail.xjtu.edu.cn

Scott Huxtable

Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061
huxtable@vt.edu

Dr. Srinath V. Ekkad

Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061
sekkad@vt.edu

1Corresponding author.

ASME doi:10.1115/1.4040033 History: Received May 15, 2017; Revised March 15, 2018

Abstract

Vortex generators have been widely used to enhance heat transfer in various heat exchangers. Out of the two types of vortex generators: Transverse vortex generators (TVGs) and longitudinal vortex generators (LVGs), LVGs have been found to show better heat transfer performance. Past studies have shown that the implementation of these LVGs can be used to improve heat transfer in thermoelectric generator systems. Here a built in module in COMSOL Multiphysics® was used to study the influence of the location of LVGs in the channel on the comprehensive performance of an integrated thermoelectric device (ITED). The physical model under consideration consists of a copper interconnector sandwiched between p-type and n-type semiconductors and a flow channel for hot fluid in the center of the interconnector. Four pairs of, LVGs are mounted symmetrically on the top and bottom surfaces of the flow channel. Thus, using numerical methods, the thermo-electric-hydraulic performance of the ITED with a single module is examined. By fixing the material size D, the fluid inlet temperature , and attack angle ß; the effects of the location of LVGs and Reynolds number were investigated on the heat transfer performance, power output, pressure drop and thermal conversion efficiency. The location of LVGs did not have significant effect on the performance of TEGs in the given model. However, the performance parameters show a considerable change with Reynold’s number and best performance is obtained at Reynold number of Re = 500.

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