This title appears in the Scientific Report :
2022
Please use the identifier:
http://dx.doi.org/10.1002/ente.202200152 in citations.
Please use the identifier: http://hdl.handle.net/2128/32523 in citations.
Waste Heat to Power: Full‐Cycle Analysis of a Thermally Regenerative Flow Battery
Waste Heat to Power: Full‐Cycle Analysis of a Thermally Regenerative Flow Battery
Large amounts of waste heat, below 120 °C, are released globally by industry. To convert this low-temperature waste heat to power, thermally regenerative flow batteries (TRFBs) have recently been studied. Most analyses focus on either the discharging or the regeneration phase. However, both phases h...
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Personal Name(s): | Engelpracht, Mirko (Corresponding author) |
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Kohrn, Markus / Tillmanns, Dominik / Seiler, Jan / Bardow, André (Corresponding author) | |
Contributing Institute: |
Modellierung von Energiesystemen; IEK-10 |
Published in: | Energy technology, 10 (2022) 8, S. 2200152 - |
Imprint: |
Weinheim [u.a.]
Wiley-VCH
2022
|
DOI: |
10.1002/ente.202200152 |
Document Type: |
Journal Article |
Research Program: |
ohne Topic |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/32523 in citations.
Large amounts of waste heat, below 120 °C, are released globally by industry. To convert this low-temperature waste heat to power, thermally regenerative flow batteries (TRFBs) have recently been studied. Most analyses focus on either the discharging or the regeneration phase. However, both phases have to be considered to holistically assess the performance of the flow battery. Therefore, a dynamic, open-access, full-cycle model of a Cu–NH3 TRFB is developed in Modelica and validated with data from the literature. Based on the validated model, a trade-off between power density and efficiency is shown that depends only on the discharging strategy of the flow battery. For a sensible heat source with an inlet temperature of 120 °C and heat transfer at a thermodynamic mean temperature of about 90 °C, the power density reaches 38 W m−2 over a complete cycle, and the efficiency reaches 20% of Carnot efficiency. In a benchmarking study, the power production of the flow battery is shown to already achieve 34% of a fully optimized organic Rankine cycle. Thus, TRFBs require further optimization to become a competitive technology for power production and energy storage from low-temperature waste heat. |