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Energy performance comparison of a 3-fluid and 2-fluid liquid desiccant membrane air-conditioning systems in an office building

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  • Storle, Devin
  • Abdel-Salam, Mohamed R.H.
  • Simonson, Carey J.

Abstract

In this paper, the cooling and dehumidifying capacities of two liquid desiccant membrane air-conditioning (M-LDAC) systems are investigated and compared when installed in an office building located in a hot-humid climate (Miami, Florida). The building HVAC system consists of a radiant cooling system to cover the sensible load and either a 2-fluid or 3-fluid M-LDAC system to meet the latent load. The systems are simulated over the warmest week of the year using TRNSYS simulation software and modelled using a previously developed analytical model for the 2-fluid M-LDAC system and empirical models for the 3-fluid M-LDAC systems. Sensitivity studies are performed where the systems are evaluated under different latent load conditions due to different occupant densities and infiltration rates. The 2-fluid and 3-fluid M-LDAC systems can meet the latent loads at lower occupant densities and infiltration rates but fail to provide thermal comfort conditions as occupancy and infiltration rates increase. It is concluded that the 3-fluid M-LDAC system uses less energy to meet the latent load than the 2-fluid M-LDAC system. The 2-fluid M-LDAC system consumes 50% more energy than the 3-fluid M-LDAC system to provide thermal comfort to the office building during the weekly simulation.

Suggested Citation

  • Storle, Devin & Abdel-Salam, Mohamed R.H. & Simonson, Carey J., 2019. "Energy performance comparison of a 3-fluid and 2-fluid liquid desiccant membrane air-conditioning systems in an office building," Energy, Elsevier, vol. 176(C), pages 437-456.
    • Handle: RePEc:eee:energy:v:176:y:2019:i:c:p:437-456
    DOI: 10.1016/j.energy.2019.03.121
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    References listed on IDEAS

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    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. Abdel-Salam, Mohamed R.H. & Fauchoux, Melanie & Ge, Gaoming & Besant, Robert W. & Simonson, Carey J., 2014. "Expected energy and economic benefits, and environmental impacts for liquid-to-air membrane energy exchangers (LAMEEs) in HVAC systems: A review," Applied Energy, Elsevier, vol. 127(C), pages 202-218.
    3. Mohammad, Abdulrahman Th. & Bin Mat, Sohif & Sulaiman, M.Y. & Sopian, K. & Al-abidi, Abduljalil A., 2013. "Survey of hybrid liquid desiccant air conditioning systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 20(C), pages 186-200.
    4. Abdel-Salam, Ahmed H. & Simonson, Carey J., 2016. "State-of-the-art in liquid desiccant air conditioning equipment and systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 58(C), pages 1152-1183.
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    Cited by:

    1. Chul-Ho Kim & Seung-Eon Lee & Kwang-Ho Lee & Kang-Soo Kim, 2019. "Detailed Comparison of the Operational Characteristics of Energy-Conserving HVAC Systems during the Cooling Season," Energies, MDPI, vol. 12(21), pages 1-29, October.
    2. Park, Myeong Hyeon & Chung, Jun Yeob & Hong, Seong Ho & Shin, Hyun Ho & Lee, Dongchan & Kim, Yongchan, 2023. "Optimized geometric designs of desiccant wheels with metal-organic frameworks considering dehumidification capacity and energy," Energy, Elsevier, vol. 284(C).
    3. Yang, Zili & Tao, Ruiyang & Chen, Lu-An & Zhong, Ke & Chen, Bin, 2020. "Feasibility study on improving the performance of atomization liquid desiccant dehumidifier with standing-wave ultrasound," Energy, Elsevier, vol. 205(C).
    4. Li, Wei & Yao, Ye, 2021. "Performance analysis of different flow types of internally-cooled membrane-based liquid desiccant dehumidifiers," Energy, Elsevier, vol. 228(C).
    5. Shukla, D.L. & Modi, K.V., 2022. "Influence of distinct input parameters on performance indices of dehumidifier, regenerator and on liquid desiccant-operated evaporative cooling system – A critical review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 168(C).

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