期刊
ENERGY CONVERSION AND MANAGEMENT
卷 138, 期 -, 页码 651-658出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2017.02.014
关键词
Resorption; Composite sorbent; Energy upgrade; Energy storage density
资金
- National Natural Science Foundation of China [51606118]
- Innovative Research Groups of the National Natural Science Foundation of China [51521004]
- IDRIST - Engineering and Physical Science Research Council of the UK [EP/M008088/1]
- EPSRC [EP/M008088/1, EP/N02155X/1] Funding Source: UKRI
Progress of efficient thermal energy storage (TES) has become a key technology for the development of energy conversion system. Among TES technologies, sorption thermal energy storage (STES) has drawn burgeoning attentions due to its advantages of high energy density, little heat loss and flexible working modes. Based on STES, this paper presents an innovative resorption sorption energy storage (RTES), and the experimental system is established and investigated for energy storage and upgrade. 4.8 kg and 3.9 kg MnCl2 and CaCl2 composite sorbents are separately filled ill the sorption reactor, and expanded natural graphite treated with sulfuric acid (ENG-TSA) is integrated as the matrix for heat transfer intensification. It is indicated that the highest energy storage density are 662 kJ/kg and 596 kJ/kg when heat input temperature is 125 degrees C and heat release temperature are 130 degrees C and 135 degrees C, respectively. For different heat input and release temperature, the energy efficiency and exergy efficiency range from 27.5% to 40.6% and from 32.5% to 47%, respectively. The novel RTES system verifies the feasibility for energy storage and upgrade, which shows the great potential for low grade heat utilization especially for industrial process. (C) 2017 Elsevier Ltd. All rights reserved.
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