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Experimental and numerical investigation of integrating energy recovery ventilation into a thermodynamic-potential-based passive dehumidification system using renewable energy

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Listed:
  • Chen, Yulu
  • Lee, Haksung
  • Ozaki, Akihito
  • Choi, Younhee
  • Arima, Yusuke

Abstract

To decrease the latent heat load of the air-conditioning system in residential buildings, we proposed a passive dehumidification and mechanical ventilation system that integrates energy recovery ventilation (ERV) into a passive dehumidification and solar collection (PDSC) system that can intelligently regulate the indoor hygrothermal environment, referred to as the PSE (PDSC & ERV) system. Field studies were conducted by monitoring the indoor temperature and humidity changes in the operating conditions using various systems. With the PSE system, the absolute humidity difference between the indoor and outdoor air was the most significant, and its ability to maintain a stable indoor relative humidity was the most remarkable compared with other systems. The PSE model had the lowest latent and total heat load compared with the exhaust-only ventilation model equipped with a standard insulated envelope without moisture adsorption and desorption function. Regression analysis showed that the higher the outdoor temperature, absolute humidity, relative humidity, and solar radiation in summer, the more significant the PSE system's latent heat load reduction effectiveness. Linear correlation between absolute humidity and energy-saving performance was the most evident, with a coefficient of determination as high as 0.98, illustrating the suitability of PSE systems for hot and humid areas.

Suggested Citation

  • Chen, Yulu & Lee, Haksung & Ozaki, Akihito & Choi, Younhee & Arima, Yusuke, 2024. "Experimental and numerical investigation of integrating energy recovery ventilation into a thermodynamic-potential-based passive dehumidification system using renewable energy," Energy, Elsevier, vol. 289(C).
    • Handle: RePEc:eee:energy:v:289:y:2024:i:c:s0360544223032826
    DOI: 10.1016/j.energy.2023.129888
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    References listed on IDEAS

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    1. Ma, Qingsong & Fukuda, Hiroatsu & Lee, Myonghyang & Kobatake, Takumi & Kuma, Yuko & Ozaki, Akihito, 2018. "Study on the utilization of heat in the mechanically ventilated Trombe wall in a house with a central air conditioning and air circulation system," Applied Energy, Elsevier, vol. 222(C), pages 861-871.
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    3. Ma, Qingsong & Fukuda, Hiroatsu & Wei, Xindong & Hariyadi, Agus, 2019. "Optimizing energy performance of a ventilated composite Trombe wall in an office building," Renewable Energy, Elsevier, vol. 134(C), pages 1285-1294.
    4. Haksung Lee & Akihito Ozaki & Younhee Choi & Muhammad Iqbal, 2021. "Performance Improvement Plan of Air Circulation-Type Solar Heat-Storage System Using Ventilated Cavity of Roof," Energies, MDPI, vol. 14(6), pages 1-13, March.
    5. Wansheng Yang & Hao Deng & Zhangyuan Wang & Xudong Zhao & Song He, 2017. "Performance Investigation of the Novel Solar-Powered Dehumidification Window for Residential Buildings," Energies, MDPI, vol. 10(9), pages 1-17, September.
    6. Younhee Choi & Akihito Ozaki & Haksung Lee, 2022. "Impact of Window Frames on Annual Energy Consumption of Residential Buildings and Its Contribution to CO 2 Emission Reductions at the City Scale," Energies, MDPI, vol. 15(10), pages 1-15, May.
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