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Comparative study of a bottoming SRC and ORC for Joule–Brayton cycle cooling modular HTR exergy losses, fluid-flow machinery main dimensions, and partial loads
Abstract
Energy conversion efficiency increase in power plants with high-temperature gas-cooled reactors via implementation of the bottoming cycle was investigated under nominal and minimal thermal load of a high-temperature reactor (HTR). Heat transfer surface area and turbine outlet volumetric flow rate in bottoming cycles was also investigated. Water and two low-boiling point working fluids (ammonia and ethanol) were analyzed. Analyzed thermodynamic cycles consisted of a closed Joule-Brayton cycle with helium as working medium, which was investigated in configurations with heat regeneration, compressor intercoolers, and in a simple design. Organic versus steam Rankine cycles were compared; low-boiling point fluids under supercritical conditions in some configurations provide higher cycle energy efficiency than the gas-steam cycle. Volumetric flow rates in the last turbine stages were reduced against the steam turbine to 38% and 0.8% with ethanol and ammonia, respectively. The steam Rankine cycle configuration provided the smallest heat transfer surface increase compared with the base cycle.
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Authors (3)
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Tomasz Kowalczyk
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Janusz Badur prof.
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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ENERGY
no. 206,
ISSN: 0360-5442 - Language:
- English
- Publication year:
- 2020
- Bibliographic description:
- Kowalczyk T., Badur J., Ziółkowski P.: Comparative study of a bottoming SRC and ORC for Joule–Brayton cycle cooling modular HTR exergy losses, fluid-flow machinery main dimensions, and partial loads// ENERGY -Vol. 206, (2020), s.118072-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.energy.2020.118072
- Verified by:
- Gdańsk University of Technology
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