Utilizing finned tube economizer for extending the thermal power rate of TEG CHP system

The thermoelectric generator (TEG) is an extremely useful device for converting thermal waste into electricity. To overcome the problem of the low conversion rate of TEGs, we present a model based on combined heat and power (CHP) production for simultaneous generation of electrical and thermal powers. This paper proposes a novel laboratory TEG based on CHP model for maximizing the possible output level of both powers by a compensating method. We applied an economizer section in the design of this model. Based on this method, the temperature gradient for the TEGs can rise as well. By connecting an economizer, the wasted heat from the TEGs can be compensated significantly in the second section (economizer part). To evaluate the functionality of the proposed set, we tested the performance of our prototype in two different modes: one with an economizer and another without that. The results obtained confirmed that the efficiency of the suggested TEG based on CHP system enhanced (up to 90%) by using an economizer. (C) 2020 Elsevier Ltd. All rights reserved.