Techno-economic analysis of supercritical carbon dioxide cycle integrated with coal-fired power plant
نویسندگان
چکیده
Supercritical carbon dioxide (sCO2) cycles can achieve higher efficiencies than an equivalent steam Rankine cycle at turbine inlet temperatures (>550 °C) with a compact footprint (tenfold). sCO2 are low-pressure ratio (~4–7), therefore recuperation is necessary, which reduces the heat-addition temperature range. Integration of boiler requires careful management low-temperature heat to plant efficiency. This study analyses four novel configurations capture in efficient way and performance benchmarked against state-of-the-art cycle. The process parameters (13–16 variables) all optimised using genetic algorithm for two different (620 °C 760 their techno-economic compared advanced ultra-supercritical A power efficiency by about 3–4% points, correspond level 2–3% leading cost electricity (COE) reduction. Although has increased when increasing from 620 °C, COE does not notably reduce owing capital cost. detailed sensitivity performed variations compressor isentropic efficiency, pressure drop, recuperator approach capacity factor. Monte-Carlo analysis shows that be reduced up 6–8% cycle, however, uncertainty functions diminish this 0–3% 95% percentile cumulative probability.
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ژورنال
عنوان ژورنال: Energy Conversion and Management
سال: 2021
ISSN: ['0196-8904', '1879-2227']
DOI: https://doi.org/10.1016/j.enconman.2021.114294