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Title: Performance analysis of absorption thermal energy storage for distributed energy systems
Authors: Wang, L 
Xiao, F 
Cui, B
Hu, M 
Lu, T 
Keywords: Absorption thermal energy storage
Distributed energy system
Peak load shifting
Self-sufficient micro grid
Waste heat
Issue Date: 2019
Publisher: Elsevier
Source: Energy procedia, 2019, v. 158, p. 3152-3157 How to cite?
Journal: Energy procedia 
Abstract: In recent years, distributed energy systems (DES) have attracted worldwide attention. Distributed generation unit (DG) in DES usually works under part load during night, which results in low efficiency and the waste heat of DG cannot be fully utilized. This study proposes a novel absorption thermal energy storage system together with electric energy storage for distributed energy systems. The proposed absorption thermal energy storage system which is a combination of absorption chiller and liquid storage tanks, has a higher energy storage density. During off-peak hours, the extra electricity of DG can be used by electric chillers (EC) and the extra waste heat of DG is stored by the proposed absorption thermal energy storage system. The stored thermal energy is released in peak hours to meet the cooling loads of buildings. A case study of DES in a campus under cooling-dominated climate is conducted to evaluate the performance of the proposed system. The results in a typical summer day indicate that the DG utilization rate increases from 80% to 92.9%, meanwhile the required capacities of electric chillers can be obviously reduced. The operating cost of DES also reduces by 12.9% compared with the DES without energy storage. Through appropriate operation strategy, off-the-grid operation for DES can be achieved without energy waste by applying the proposed energy storage method.
Description: 10th International Conference on Applied Energy, ICAE 2018, Hong Kong, 22-25 August 2018
EISSN: 1876-6102
DOI: 10.1016/j.egypro.2019.01.1017
Rights: © 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license ( Peer-review under responsibility of the scientific committee of ICAE2018 – The 10th International Conference on Applied Energy.
The following publication Wang, L., Xiao, F., Cui, B., Hu, M., & Lu, T. (2019). Performance analysis of absorption thermal energy storage for distributed energy systems. Energy Procedia, 158, 3152-3157 is available at
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