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Energy Performance Comparison between Two Liquid Desiccant and Evaporative Cooling-Assisted Air Conditioning Systems

Author

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  • Su Liu

    (Department of Architectural Engineering, College of Engineering, Hanyang University, Seoul 04763, Korea)

  • Jae-Weon Jeong

    (Department of Architectural Engineering, College of Engineering, Hanyang University, Seoul 04763, Korea)

Abstract

This study investigated the annual energy saving potential and system performance of two different evaporative cooling-based liquid desiccant and evaporative cooling-assisted air conditioning systems. One system used an indirect and direct evaporative cooler with a two-stage package to match the target supply air point. The other was equipped with a single-stage, packaged dew-point evaporative cooler that used a portion of the process air, which had been dehumidified in advance. Systems installed with the two evaporative coolers were compared to determine which one was more energy efficient and which one could provide better thermal comfort for building occupants in a given climate zone, using detailed simulation data. The detailed energy consumption data of these two systems were estimated using an engineering equation solver with each component model. The results showed that the liquid desiccant and dew-point evaporative-cooler-assisted 100% outdoor air system (LDEOAS) resulted in approximately 34% more annual primary energy consumption than that of the liquid desiccant and the indirect and direct evaporative-cooler-assisted 100% outdoor air system (LDIDECOAS). However, the LDEOAS could provide drier and cooler supply air, compared with the LDIDECOAS. In conclusion, LDIDECOAS has a higher energy saving potential than LDEOAS, with an acceptable level of thermal comfort.

Suggested Citation

  • Su Liu & Jae-Weon Jeong, 2020. "Energy Performance Comparison between Two Liquid Desiccant and Evaporative Cooling-Assisted Air Conditioning Systems," Energies, MDPI, vol. 13(3), pages 1-22, January.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:3:p:522-:d:311336
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    References listed on IDEAS

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    1. Xudong Zhao & Zhiyin Duan & Changhong Zhan & Saffa B. Riffat, 2009. "Dynamic performance of a novel dew point air conditioning for the UK buildings," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 4(1), pages 27-35, January.
    2. Lin, Jie & Bui, Duc Thuan & Wang, Ruzhu & Chua, Kian Jon, 2018. "On the exergy analysis of the counter-flow dew point evaporative cooler," Energy, Elsevier, vol. 165(PB), pages 958-971.
    3. Min-Hwi Kim & Joon-Young Park & Jae-Weon Jeong, 2017. "Energy Saving Potential of a Thermoelectric Heat Pump-Assisted Liquid Desiccant System in a Dedicated Outdoor Air System," Energies, MDPI, vol. 10(9), pages 1-19, September.
    4. Kim, Min-Hwi & Park, Jun-Seok & Jeong, Jae-Weon, 2013. "Energy saving potential of liquid desiccant in evaporative-cooling-assisted 100% outdoor air system," Energy, Elsevier, vol. 59(C), pages 726-736.
    5. Lin, Jie & Bui, Duc Thuan & Wang, Ruzhu & Chua, Kian Jon, 2018. "On the fundamental heat and mass transfer analysis of the counter-flow dew point evaporative cooler," Applied Energy, Elsevier, vol. 217(C), pages 126-142.
    6. Jang-Hoon Shin & Joon-Young Park & Min-Suk Jo & Jae-Weon Jeong, 2018. "Impact of Heat Pump-Driven Liquid Desiccant Dehumidification on the Energy Performance of an Evaporative Cooling-Assisted Air Conditioning System," Energies, MDPI, vol. 11(2), pages 1-21, February.
    7. Cuce, Pinar Mert & Riffat, Saffa, 2016. "A state of the art review of evaporative cooling systems for building applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 54(C), pages 1240-1249.
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    Cited by:

    1. Shuo Liu & Chang-Ho Jeong & Myoung-Souk Yeo, 2020. "Effect of Evaporator Position on Heat Pump Assisted Solid Desiccant Cooling Systems," Energies, MDPI, vol. 13(22), pages 1-21, November.

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