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

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.