| 주 저자 | Ye-Bin Shin, Deuk-Won Kim, Wangje Lee, Jae-Weon Jeong, Min-Hwi Kim |
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| 공동 저자 | - |
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| 소속 | - |
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| Abstract | This study conducted an experimental case study on the performance of water-based thermal energy storage (WTES) and prototype phase change material (PCM)-based thermal energy storage systems (TES) integrated with a photovoltaic thermal (PVT) system under real operating conditions. Long-term experimental measurements were conducted over two months using a building-scale PVT system, where thermal input varied dynamically owing to changes in solar irradiance and system operation.
In this study, a conventional WTES connected to an actual PVT system and two prototype PCM-based TESs with different internal piping structures were installed, and the thermal charging and discharging behavior of each storage tank was experimentally analyzed. In addition, the thermal storage amount, storage density, and charging rates were compared based on the inlet and outlet temperatures and flow rates of each system. The average thermal energy collected by the PVT system was 15.2 kWh, of which 9.4 kWh was stored in the WTES, whereas 0.2 kWh and 0.4 kWh were stored in the prototype PCM1-and prototype PCM2-based TES units, respectively. The thermal storage densities were 18.7 kWh/m3 for the WTES, 14.1 kWh/m3 for the prototype PCM1-based TES, and 47.4 kWh/m3 for the prototype PCM2-based TES. In particular, the prototype PCM2-based storage tank with an improved internal piping structure showed higher thermal storage density than PCM1. However, the charging and discharging rates of prototype PCM-based storage tanks were found to be insufficient for real-time thermal buffers under actual PVT operating conditions. The average charging rate of the PCM-based storage tanks was 0.1 kW, compared to 2.6 kW for the WTES. This slow dynamic response constitutes the major limitations of the PCM-based thermal storage concept as tests in this study. This study provided data for the design direction of storage tanks for building applications. |
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| Keyword | Phase change materials, Thermal energy storage, Photovoltaic and thermal system |
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| 페이지 | pp. 1~20 |
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| 논문 파일 |
없음
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| 게재일시 |
2026-09
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| DOI | https://doi.org/10.1016/j.csite.2026.108381 |
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| 학회/저널명 | Case Studies in Thermal Engineering Vol.85, No.108381 |
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| 년도 | 2026 |
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| 추가 문구 | https://doi.org/10.1016/j.csite.2026.108381 |
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| 등록 일시 | 2026-07-30 09:20:54 |
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