Non-Stationary Thermoelectric Generators

Stockholm, J.G.

doi:10.5772/66421

Cited by 2 publications

(3 citation statements)

References 10 publications

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“…Thinner TIM improves TEC and TEG capabilities [10] Case study I (Teffah et al, 2018) TEC was used as a TEG cooler in simulated and practical setups. The ΔT was directly proportional to the TEC V in and TEG V out [21,22] Case study J (Stockholm, 2016) Demonstrated that the output power from TEG when pulsed doubles the conversion efficiency. An 8.4% increase was attained [9] Case study K (Kiziroglou et al, 2016) Proved that thicker TEGs with good area coverage can be used to harvest electricity from the environment with fluctuating temperatures [14] Case study L (Sulaiman et al, 2017) Showed the use of a TEG with FC under simulated natural (static) and forced convection cooling (dynamic) to convert heat to power However, very high ΔT is required to generate significant power [15] Case study M (Hasani and Rahbar, 2015) Demonstrated the duality of TECs as TEGs in a FC CHP using a THRS.…”

Section: Resultsmentioning

confidence: 99%

“…Nonstationary TEGs. In [12,21,22], a review of theoretical publications on nonsteady thermoelectrics are presented, in which different aspects of nonstationary and pulsed processes in thermoelectric materials and devices were examined. Theoretical analyses of the dynamic behaviour of thermoelectric devices, including analyses of small and large signals of thermoelectric generator, are given and details of the principle of quasi-equilibrium thermoelectricity are discussed as well.…”

Section: Teg and Microturbine Combined Heat And Power (Chp)mentioning

confidence: 99%

“…In this publication, the method, characteristics, and challenges in harvesting waste heat from a low temperature fuel cell using a direct energy conversion device were studied. A Figure 10: Pulsing TEG electrical output power using MOSFETs (adapted from [21,22]).…”

mentioning

confidence: 99%

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A Structural Review of Thermoelectricity for Fuel Cell CCHP Applications

2020

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This article starts by introducing the ongoing South Africa electricity crisis followed by thermoelectricity, in which eighteen miscellaneous applicable case studies are structurally analysed in detail. The aim is to establish best practices for the R&D of an efficient thermoelectric (TE) and fuel cell (FC) CCHP system. The examined literature reviews covered studies that focused on the thermoelectricity principle, highlighting TE devices’ basic constructions, TEGs and TECs as well as investigations on the applications of thermoelectricity with FCs, whereby thermoelectricity was applied to recover waste heat from FCs to boost the power generation capability by ~7–10%. Furthermore, nonstationary TEGs whose generated power can be increased by pulsing the DC-DC power converter showed that an output power efficiency of 8.4% is achievable and that thicker TEGs with good area coverage can efficiently harvest waste heat energy in dynamic applications. TEG and TEC exhibit duality and the higher the TEG temperature difference, the more the generated power—which can be stabilised using the MPPT technique with a 1.1% tracking error. A comparison study of TEG and solar energy demonstrated that TEG generates more power compared to solar cells of the same size, though more expensively. TEG output power and efficiency in a thermal environment can be maximised simultaneously if its heat flux is stable but not the case if its temperature difference is stable. The review concluded with a TEC LT-PEM-FC hybrid CCHP system capable of generating 2.79 kW of electricity, 3.04 kW of heat, and 26.8 W of cooling with a total efficiency of ~77% and fuel saving of 43.25%. The presented research is the contribution brought forward, as it heuristically highlights miscellaneous thermoelectricity studies/parameters of interests in a single manuscript, which further established that practical applications of thermoelectricity are possible and can be innovatively applied together with FC for efficient CCHP applications.

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