E3S Web Conf.
Volume 137, 2019XIV Research & Development in Power Engineering (RDPE 2019)
|Number of page(s)||6|
|Published online||16 December 2019|
Development of operation strategy for recompression supercritical CO2 cycle with intercooled main compressor under off-design condition
MOE Key Laboratory of Thermal Fluid Science and Engineering, Xi’an Jiaotong University, Xianning West Road. 28, Xi’an 710049, PR China
2 Institute for Energy Engineering, Technische Universität Berlin, Marchstr. 18, 10587 Berlin, Germany
The supercritical carbon dioxide (S-CO2) cycle is regarded as a potential option for the next generation power conversion system. Concentrated solar power (CSP) plant is one of the promising scenarios to adopt the S-CO2 cycle due to the appealing thermal efficiency and the ability to integrate thermal storage and dry cooling. Among various cycle configurations of S-CO2 cycle, the recompression S-CO2 cycle with intercooled main compressor is one of the optimal choices that can provide superior efficiency and a large enough temperature differential for thermal input, which together contribute to the minimization of the overall levelized cost of electricity (LCOE) of the whole CSP plant. The off-design performance and the associated control scheme have important effects on the CSP plant. This paper develops an off-design model for the recompression S-CO2 cycle with intercooled main compressor for the commercialized hundred-megawatt CSP plant. The effects of different off-design conditions on cycle performance are first evaluated. Different operating strategies regarding the control of cycle maximal pressure and preventing abnormal compressor conditions during off-design operation are then presented and compared. This work is expected to provide knowledge for the optimal control of recompression S-CO2 cycle with intercooled main compressor during the real operation of the CSP plant.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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