Authors: GiaYeh Huang DaJeng Yao
Publish Date: 2013/02/20
Volume: 42, Issue: 7, Pages: 1982-1987
Abstract
In this study it is shown that twodimensional 2D thermal resistance analysis is a rapid and simple method to predict the power generated from a waste heat recovery system with thermoelectric generators TEGs Performance prediction is an important part of system design generally being simulated by numerical methods with high accuracy but long computational duration Use of the presented analysis saves much time relative to such numerical methods The simple 2D model of the waste heat recovery system comprises three parts a recovery chamber the TEGs and a cooling system A finstructured duct serves as a heat recovery chamber to which were attached the hot sides of two TEGs the cold sides were attached to a cooling system The TEG module and duct had the same width In the 2D analysis unknown temperatures are located at the centroid of each cell into which the system is divided The relations among the unknown temperatures of the cells are based on the principle of energy conservation and the definition of thermal resistance The temperatures of the waste hot gas at the inlet and of the ambient fluid are known With these boundary conditions the unknown temperatures in the system become solvable and the power generated by the TEGs can be predicted Meanwhile a threedimensional 3D model of the system was simulated in FloTHERM 92 The 3D numerical solution matched the solution of the 2D analysis within 10
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