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Abstract：
Two generic models, one of a PTES (pumped thermal electricity storage) system and another of a PCES (pumped cryogenic electricity storage) system, are established in which the finite-rate heat transfer and external heat leakage losses are considered and several important parameters connecting the charging and discharging phases are introduced. Analytic expressions for the round trip efficiency and power output of PTES and PCES systems are derived. The influences of some important parameters on the performance characteristics of the PTES and PCES systems are presented, and the optimally operating region of each system is determined. The performances of PTES and PCES systems are compared. The advantages of the PTES system are highlighted. The effects of external heat leakage losses are discussed in detail. Notably, the results reveal that external heat leakage losses must be considered in the performance investigation of the PTES system. (C) 2016 Elsevier Ltd. All rights reserved.
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ENERGY
ISSN： 0360-5442
Year： 2016
Volume： 106
Page： 260-269
4 . 5 2
JCR@2016
9 . 0 0 0
JCR@2023
ESI Discipline： ENGINEERING;
ESI HC Threshold：177
JCR Journal Grade：1
CAS Journal Grade：1
Cited Count：
WoS CC Cited Count： 34
SCOPUS Cited Count： 40
ESI Highly Cited Papers on the List： 0 Unfold All
WanFang Cited Count：
Chinese Cited Count：
30 Days PV： 0
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