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Energy requirements for conditioning fresh air and the long-term savings with a membrane-based energy recovery ventilator in Hong Kong

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  • Zhang, L.Z
  • Niu, J.L

Abstract

A study of the energy requirements for conditioning ventilation air and the yearly performance of a membrane-based energy recovery ventilator (MERV) in Hong Kong is carried out. The weather data are classified into six process regions in the psychrometric chart and the percentage of annual hours in each region is determined to describe different energy requirements. The variations in the amount of required heating and cooling energy are calculated for different indoor temperature and humidity set points. It is found that the required annual energy is primarily used to remove moisture from fresh air, with only a small fraction used for sensible cooling. The energy for heating in cold weather is negligible. Energy recovery ventilators are employed to study the possible annual energy savings. Hour-by-hour calculations disclose that in hot and humid regions like Hong Kong, about 58% of the energy required for conditioning fresh air could be saved annually with an MERV, which recovers both latent and sensible energy, while only about 10% of the energy could be saved with a traditional sensible-only energy recovery ventilator (SERV). The more humid the weather, the more superior is an MERV in comparison with an SERV.

Suggested Citation

  • Zhang, L.Z & Niu, J.L, 2001. "Energy requirements for conditioning fresh air and the long-term savings with a membrane-based energy recovery ventilator in Hong Kong," Energy, Elsevier, vol. 26(2), pages 119-135.
    • Handle: RePEc:eee:energy:v:26:y:2001:i:2:p:119-135
    DOI: 10.1016/S0360-5442(00)00064-5
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    References listed on IDEAS

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    1. Zhang, Yinping & Jiang, Yi & Zhang, Li Zhi & Deng, Yuchun & Jin, Zhaofen, 2000. "Analysis of thermal performance and energy savings of membrane based heat recovery ventilator," Energy, Elsevier, vol. 25(6), pages 515-527.
    2. Lam, Joseph C., 1995. "Building envelope loads and commercial sector electricity use in Hong Kong," Energy, Elsevier, vol. 20(3), pages 189-194.
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    Cited by:

    1. Abdel-Salam, Mohamed R.H. & Ge, Gaoming & Fauchoux, Melanie & Besant, Robert W. & Simonson, Carey J., 2014. "State-of-the-art in liquid-to-air membrane energy exchangers (LAMEEs): A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 39(C), pages 700-728.
    2. Zhang, Li-Zhi, 2016. "A reliability-based optimization of membrane-type total heat exchangers under uncertain design parameters," Energy, Elsevier, vol. 101(C), pages 390-401.
    3. Qi, Ronghui & Lu, Lin, 2014. "Energy consumption and optimization of internally cooled/heated liquid desiccant air-conditioning system: A case study in Hong Kong," Energy, Elsevier, vol. 73(C), pages 801-808.
    4. Luo, Yimo & Wang, Meng & Yang, Hongxing & Lu, Lin & Peng, Jinqing, 2015. "Experimental study of the film thickness in the dehumidifier of a liquid desiccant air conditioning system," Energy, Elsevier, vol. 84(C), pages 239-246.
    5. Liu, Di & Zhao, Fu-Yun & Tang, Guang-Fa, 2010. "Active low-grade energy recovery potential for building energy conservation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(9), pages 2736-2747, December.
    6. Abdel-Salam, Ahmed H. & Simonson, Carey J., 2014. "Annual evaluation of energy, environmental and economic performances of a membrane liquid desiccant air conditioning system with/without ERV," Applied Energy, Elsevier, vol. 116(C), pages 134-148.
    7. Liu, X.P. & Niu, J.L., 2014. "An optimal design analysis method for heat recovery devices in building applications," Applied Energy, Elsevier, vol. 129(C), pages 364-372.
    8. Zhang, Li-Zhi & Fu, Huang-Xi & Yang, Qi-Rong & Xu, Jian-Chang, 2014. "Performance comparisons of honeycomb-type adsorbent beds (wheels) for air dehumidification with various desiccant wall materials," Energy, Elsevier, vol. 65(C), pages 430-440.
    9. Yiting Kang & Jianlin Wu & Shilei Lu & Yashuai Yang & Zhen Yu & Haizhu Zhou & Shangqun Xie & Zheng Fu & Minchao Fan & Xiaolong Xu, 2022. "Comprehensive Carbon Emission and Economic Analysis on Nearly Zero-Energy Buildings in Different Regions of China," Sustainability, MDPI, vol. 14(16), pages 1-23, August.
    10. Ge, Gaoming & Abdel-Salam, Mohamed R.H. & Besant, Robert W. & Simonson, Carey J., 2013. "Research and applications of liquid-to-air membrane energy exchangers in building HVAC systems at University of Saskatchewan: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 26(C), pages 464-479.
    11. Jae-Sol Choi & Jae-Hyuk Lee & Eui-Jong Kim, 2018. "Effects of ERV Filter Degradation on Indoor CO 2 Levels of a Classroom," Sustainability, MDPI, vol. 10(4), pages 1-15, April.
    12. Bao, Lingling & Wang, Jinggang & Yang, Hongxing, 2016. "Investigation on the performance of a heat recovery ventilator in different climate regions in China," Energy, Elsevier, vol. 104(C), pages 85-98.
    13. Albdoor, Ahmed K. & Ma, Zhenjun & Cooper, Paul & Ren, Haoshan & Al-Ghazzawi, Fatimah, 2020. "Thermodynamic analysis and design optimisation of a cross flow air to air membrane enthalpy exchanger," Energy, Elsevier, vol. 202(C).
    14. Nuodi Fu & Moon Keun Kim & Bing Chen & Stephen Sharples, 2021. "Comparative Modelling Analysis of Air Pollutants, PM 2.5 and Energy Efficiency Using Three Ventilation Strategies in a High-Rise Building: A Case Study in Suzhou, China," Sustainability, MDPI, vol. 13(15), pages 1-20, July.

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