Title: A novel cogeneration cycle based on a recompression supercritical carbon dioxide cycle for waste heat recovery in nuclear power plants

Authors: Mortaza Yari

Addresses: Faculty of Engineering, Department of Mechanical Engineering, University of Mohaghegh Ardabili, Ardabil 179, Iran

Abstract: In this study, a novel cogeneration cycle based on the recompression S-CO2 Brayton cycle is proposed, analysed and optimised thermodynamically to utilise the waste heat from a nuclear power plant. The cycle was constructed theoretically on the basis of a transcritical CO2 power cycle and a LiBr/H2O Absorption Heat Transformer (AHT) to enhance the overall performance of the cycle. It was found that both the energy and exergy efficiencies of the new S-CO2 cycle are about 5.526% higher than that of the simple S-CO2 cycle. A maximum pure water flow rate of 3.317 kg/s was obtained under the analysed condition for the new S-CO2 cycle.

Keywords: supercritical CO2 cycle; recompression S-CO2 cycle; transcritical CO2 cycle; Brayton cycle; exergy; AHT; absorption heat transformers; carbon dioxide; cogeneration cycle; waste heat recovery; nuclear power plants; NPP; nuclear energy; water flow rate.

DOI: 10.1504/IJEX.2012.046815

International Journal of Exergy, 2012 Vol.10 No.3, pp.346 - 364

Received: 05 Aug 2011
Accepted: 22 Sep 2011

Published online: 10 May 2012 *

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