| 주 저자 | Min-Geon Park, Beom-Jun Kim, Seheon Kim, Seong-Yong Cheon, Jae-Weon Jeong |
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| 공동 저자 | - |
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| 소속 | - |
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| Abstract | This study experimentally investigated a condenser heat-rejection enhancement system that combines energy recovery ventilator (ERV) exhaust air with a direct evaporative cooler (DEC) for an air-source heat pump (ASHP) operating under hot and humid conditions. A chamber-based experimental setup was constructed to compare four configurations: a conventional ASHP, an ASHP utilizing ERV exhaust air, an ASHP with DEC applied to the condenser, and the proposed system integrating both ERV exhaust air and DEC. In each case, the outdoor unit (ODU) inlet air conditions, refrigerant cycle characteristics, and system performance were analyzed using detailed measurements to derive the system coefficient of performance (COP). Under high-temperature and high-humidity conditions (33 °C, 21 g/kg), the proposed system reduced the ODU inlet air temperature by 6.4 °C compared with the conventional system. This temperature reduction lowered the condensing pressure and compressor work, resulting in an improvement in the system COP. Correlation models for the predicted COP were developed for each configuration to enable a consistent performance comparison under varying operating conditions. These models showed that, over the tested range of 30–33 °C and 60–70 % RH, the proposed system integrating ERV exhaust air utilization with the DEC achieved a COP improvement of 7.3–15.2 % relative to the conventional ASHP. The improvement remained dependent on the outdoor humidity, since most of the ODU inlet air cooling was provided by the DEC. The contribution of the ERV exhaust air, however, increased with the humidity ratio and reduced that dependence relative to the DEC-only configuration. Because the proposed system adds no complex equipment and requires only relatively small amounts of water and pump electricity, it offers a practical retrofitting option for improving the cooling efficiency of residential ASHPs in hot and humid conditions. |
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| Keyword | Air-source heat pump, Exhaust air, Evaporative cooler, COP improvement |
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| 페이지 | pp. 1~19 |
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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.jobe.2026.117372 |
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| 학회/저널명 | Journal of Building Engineering Vol.132, No.117372 |
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| 년도 | 2026 |
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| 추가 문구 | https://doi.org/10.1016/j.jobe.2026.117372 |
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| 등록 일시 | 2026-03-18 16:18:32 |
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