Abstract
The pumped thermal electricity storage (PTES) system based on the supercritical carbon dioxide was studied. The thermodynamic and economic analysis models were developed, and the system parameters were optimized, so as to analyze the effects of compressor efficiency, turbine efficiency, pressure loss and the minimum heat exchange temperature difference on the system performance. In addition, an integrated system configuration using gas turbine exhaust as external heat source was proposed. The performance of the independent PTES system and the integrated external heat source system was analyzed. Results show that the highest roundtrip efficiency of the independent PTES system can reach 62. 91%. After integrating the external thermal, the investment cost per unit energy decreases, and the energy efficiency of the system decreases with the increase of discharge time and discharge power.
| Translated title of the contribution | Performance Evaluation on Supercritical Carbon Dioxide Pumped Thermal Electricity Storage System Integrated with External Thermal Source |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 1469-1476 |
| Number of pages | 8 |
| Journal | Dongli Gongcheng Xuebao/Journal of Chinese Society of Power Engineering |
| Volume | 43 |
| Issue number | 11 |
| DOIs | |
| State | Published - 2023 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 7 Affordable and Clean Energy
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