Modelling and Experimental Characterisation of a Water-to-Air Thermoelectric Heat Pump with Thermal Energy Storage

Kaixuan Zhou, Shunmin Zhu (), Yaodong Wang () and Anthony Paul Roskilly
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Kaixuan Zhou: Department of Engineering, Durham University, Durham DH1 3LE, UK
Shunmin Zhu: Department of Engineering, Durham University, Durham DH1 3LE, UK
Yaodong Wang: Department of Engineering, Durham University, Durham DH1 3LE, UK
Anthony Paul Roskilly: Department of Engineering, Durham University, Durham DH1 3LE, UK

Energies, 2024, vol. 17, issue 2, 1-18

Abstract: Nowadays, increasing the penetration of renewable heat technologies is an important approach to minimise global primary energy use and reduce CO 2 emissions for a sustainable future. Thermoelectric heat pumps, which have some unique characteristics in comparison with conventional vapour compression heat pumps, can be integrated with solar thermal energy storage to form a promising renewable heat technology. However, currently, a reliable numerical model for TeHPs suitable for building energy simulation is lacking and the benefits achievable for a TeHP thanks to the integration with heat storage are unclear. To solve these issues, in this work, an experimental apparatus consisting of a water-to-air TeHP unit with a heat storage tank is modelled and tested for the first time, under the scenarios with thermal energy storage and without thermal energy storage, respectively. The results found that the developed numerical model could well predict the output performance of the TeHP unit, with deviations within 12%. Additionally, the output performance of the TeHP unit when combined with a heat storage tank is better than that of the TeHP unit without heat storage, in terms of the maximum temperature achieved in the testing box, the temperature response speed of the testing box, and the coefficient of performance (COP) of the TeHP unit. This work not only paves the way for the following building-integrated simulations of TeHP units, but also provides guidance for the design of the integrated systems that include TeHPs and thermal energy storage.

Keywords: energy conversion; thermoelectric; heat pump; thermal energy storage; coefficient of performance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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