Abstract
In the present paper, a high-temperature packed bed energy storage system of volume 175,000m3 is numerically investigated. The system is a underground packed bed of truncated conical shape, which comprises of rocks as a storage medium and air as a heat transfer fluid. A one-dimensional, two-phase model is developed to simulate the transient behavior of the storage. The developed model is used to conduct a parametric study with a wide range of design parameters to investigate the change in performance during both charging and discharging operation. Results show that the model satisfactorily predicts the dynamic behavior, and the truncated conical shaped storage with a rock diameter of 3cm, insulation thickness up to 0.6m and charging-discharging rate of 553kg/s leads to lower thermal losses and higher energy efficiencies. The paper provides useful insight into the transient performance and efficiency of a large-scale packed bed energy storage system within the range of parameters investigated.
Original language | English |
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Title of host publication | Proceedings of ASME - JSME - KSME 2019 Joint Fluids Engineering Conference : Fluid Mechanics |
Number of pages | 8 |
Publisher | American Society of Mechanical Engineers |
Publication date | Jul 2019 |
ISBN (Electronic) | 9780791859025 |
DOIs | |
Publication status | Published - Jul 2019 |
Event | ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference - San Francisco, United States Duration: 28 Jul 2019 → 1 Aug 2019 |
Conference
Conference | ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference |
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Country/Territory | United States |
City | San Francisco |
Period | 28/07/2019 → 01/08/2019 |