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A Novel Constant-Pressure Pumped Hydro Combined with Compressed Air Energy Storage System

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School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
Academic Editor: Chang Sik Lee
Energies 2015, 8(1), 154-171; https://doi.org/10.3390/en8010154
Received: 28 August 2014 / Accepted: 19 December 2014 / Published: 26 December 2014
(This article belongs to the Special Issue Sustainable Energy Innovation: Strategies to Accelerate Progress)
As intermittent renewable energy is receiving increasing attention, the combination of intermittent renewable energy with large-scale energy storage technology is considered as an important technological approach for the wider application of wind power and solar energy. Pumped hydro combined with compressed air energy storage system (PHCA) is one of the energy storage systems that not only integrates the advantages but also overcomes the disadvantages of compressed air energy storage (CAES) systems and pumped hydro energy storage systems to solve the problem of energy storage in China’s arid regions. Aiming at the variable working conditions of PHCA system technology, this study proposes a new constant-pressure PHCA. The most significant characteristics of this system were that the water pump and hydroturbine work under stable conditions and this improves the working efficiency of the equipment without incurring an energy loss. In addition, the constant-pressure PHCA system was subjected to energy and exergy analysis, in expectation of exploring an attractive solution for the large-scale storage of existing intermittent renewable energy. View Full-Text
Keywords: compressed air; constant-pressure pumped hydro energy storage; energy storage; thermodynamic analysis compressed air; constant-pressure pumped hydro energy storage; energy storage; thermodynamic analysis
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Yao, E.; Wang, H.; Liu, L.; Xi, G. A Novel Constant-Pressure Pumped Hydro Combined with Compressed Air Energy Storage System. Energies 2015, 8, 154-171.

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