Modeling assisted evaluation of direct electricity generation from waste heat of wastewater via a thermoelectric generator
By Zou, Shiqiang; Kanimba, Eurydice; Diller, Thomas E.; Tian, Zhiting; He, Zhen
Published in Science of The Total Environment
2018
Abstract
The thermal energy represents a significant portion of energy potential in municipal wastewater and may be recovered as electricity by a thermoelectric generator (TEG). Converting heat to all-purpose electricity by TEG has been demonstrated with large heat gradients, but its application in waste heat recovery from wastewater has not been well evaluated. Herein, a bench-scale Bi2Te3-based waste heat recovery system was employed to generate electricity from a low temperature gradient through a combination of experiments and mathematical modeling. With an external resistance of 7.8 ? and a water (hot side) flow rate of 75 mL min?1, a maximum normalized energy recovery of 4.5
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