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Comparative study on optimized round-trip efficiency of pumped thermal and pumped cryogenic electricity storages

机译:泵浦热泵低温电力储存优化往返效率的比较研究

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摘要

Based on the finite-time thermodynamics, the optimized round-trip efficiencies of pumped thermal electricity storage (PTES) and pumped cryogenic electricity storage (PCES) are derived under different optimization criteria, which include maximum power optimization, efficiency power optimization, ecological optimization, and unified trade-off optimization. The effect of charging and discharging time ratio on the optimized round-trip efficiency (ORTE) of PTES and PCES systems is investigated. The upper and lower bounds of ORTE under different optimization criteria are reached when the charging and discharging time ratio tend, respectively, to infinity or zero. The optimized performance of PTES and PCES systems under different optimization criteria is compared, and it is found that the ecological optimization and unified trade-off optimization of PTES and PCES systems can give more superior performance.
机译:基于有限时间的热力学,在不同的优化标准下衍生出泵浦热电存储(PTE)和泵浦电力存储(PCE)的优化往返效率,包括最大功率优化,效率功率优化,生态优化, 和统一的权衡优化。 研究了充电和放电时间比对PTES和PCE系统的优化往返效率(ORTE)的影响。 当充电和放电时间比分别趋于到无穷大或零时,达到不同优化标准下的ORTE的上边界。 比较了不同优化标准下PTES和PCE系统的优化性能,并发现PTES和PCE系统的生态优化和统一权衡优化可以提供更优越的性能。

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