IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v101y2016icp229-238.html
   My bibliography  Save this article

Investigation on the dynamic characteristics of the counter-current flow for liquid desiccant dehumidification

Author

Listed:
  • Lu, Hao
  • Lu, Lin
  • Luo, Yimo
  • Qi, Ronghui

Abstract

The dynamic characteristics of solution film flow with counter-current air flow, especially the two phase contact area, are important for the optimal design and operation of LDD (liquid desiccant dehumidifier). However, the unsteady interfacial information, including the interfacial pressure, velocity and film thickness, is hardly to be examined accurately by theoretical prediction or experimental measurement due to its complexity. In this study, CFD (computational fluid dynamic) models for the counter-current flow of the LDD were established based on the VOF (volume of fraction) and RNG (Renormalization group) k-ε turbulence model. Experimental research had been conducted to validate the liquid film thickness and typical interfacial waves obtained in simulation. With the established model, the dynamic formation process of unsteady counter-current flow is evaluated. Moreover, the effects of various parameters on the liquid film waves, pressure drop, liquid film thickness and interfacial information were obtained and analyzed by the built models. With the increase of liquid flow rate, the roll waves appear and the wave amplitudes are increased significantly, which may obviously enhance the performance in the LDD absorption and regeneration process due to the increased contact area.

Suggested Citation

  • Lu, Hao & Lu, Lin & Luo, Yimo & Qi, Ronghui, 2016. "Investigation on the dynamic characteristics of the counter-current flow for liquid desiccant dehumidification," Energy, Elsevier, vol. 101(C), pages 229-238.
    • Handle: RePEc:eee:energy:v:101:y:2016:i:c:p:229-238
    DOI: 10.1016/j.energy.2016.02.023
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544216300652
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2016.02.023?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Zhang, L.Z., 2006. "Energy performance of independent air dehumidification systems with energy recovery measures," Energy, Elsevier, vol. 31(8), pages 1228-1242.
    2. Mortazavi, Mehdi & Nasr Isfahani, Rasool & Bigham, Sajjad & Moghaddam, Saeed, 2015. "Absorption characteristics of falling film LiBr (lithium bromide) solution over a finned structure," Energy, Elsevier, vol. 87(C), pages 270-278.
    3. 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.
    4. Luo, Yimo & Yang, Hongxing & Lu, Lin & Qi, Ronghui, 2014. "A review of the mathematical models for predicting the heat and mass transfer process in the liquid desiccant dehumidifier," Renewable and Sustainable Energy Reviews, Elsevier, vol. 31(C), pages 587-599.
    5. Yin, Yonggao & Qian, Junfei & Zhang, Xiaosong, 2014. "Recent advancements in liquid desiccant dehumidification technology," Renewable and Sustainable Energy Reviews, Elsevier, vol. 31(C), pages 38-52.
    6. Qi, Ronghui & Lu, Lin & Yang, Hongxing & Qin, Fei, 2013. "Investigation on wetted area and film thickness for falling film liquid desiccant regeneration system," Applied Energy, Elsevier, vol. 112(C), pages 93-101.
    7. Luo, Yimo & Yang, Hongxing & Lu, Lin, 2014. "Dynamic and microscopic simulation of the counter-current flow in a liquid desiccant dehumidifier," Applied Energy, Elsevier, vol. 136(C), pages 1018-1025.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Chai, Shaowei & Sun, Xiangyu & Zhao, Yao & Dai, Yanjun, 2019. "Experimental investigation on a fresh air dehumidification system using heat pump with desiccant coated heat exchanger," Energy, Elsevier, vol. 171(C), pages 306-314.
    2. Wu, Qiong & Cai, WenJian & Shen, Suping & Wang, Xinli & Ren, Haoren, 2017. "A regulation strategy of working concentration in the dehumidifier of liquid desiccant air conditioner," Applied Energy, Elsevier, vol. 202(C), pages 648-661.
    3. Yang, Zili & Tao, Ruiyang & Ni, Hui & Zhong, Ke & Lian, Zhiwei, 2019. "Performance study of the internally-cooled ultrasonic atomization liquid desiccant dehumidification system," Energy, Elsevier, vol. 175(C), pages 745-757.
    4. Shih-Cheng Hu & Angus Shiue & Yi-Shiung Chiu & Archy Wang & Jacky Chen, 2016. "Simplified Heat and Mass Transfer Model for Cross-Flow and Countercurrent Flow Packed Bed Tower Dehumidifiers with a Liquid Desiccant System," Sustainability, MDPI, vol. 8(12), pages 1-13, December.
    5. Liu, Wei & Gong, Yanfeng & Niu, Xiaofeng & Shen, Junjie & Kosonen, Risto, 2019. "Dynamic modeling of liquid-desiccant regenerator based on a state–space method," Applied Energy, Elsevier, vol. 240(C), pages 744-753.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Wen, Tao & Lu, Lin, 2019. "A review of correlations and enhancement approaches for heat and mass transfer in liquid desiccant dehumidification system," Applied Energy, Elsevier, vol. 239(C), pages 757-784.
    2. Wen, Tao & Lu, Lin & Dong, Chuanshuai & Luo, Yimo, 2018. "Development and experimental study of a novel plate dehumidifier made of anodized aluminum," Energy, Elsevier, vol. 144(C), pages 169-177.
    3. Islam, M.R. & Alan, S.W.L. & Chua, K.J., 2018. "Studying the heat and mass transfer process of liquid desiccant for dehumidification and cooling," Applied Energy, Elsevier, vol. 221(C), pages 334-347.
    4. Luo, Yimo & Chen, Yi & Yang, Hongxing & Wang, Yuanhao, 2017. "Study on an internally-cooled liquid desiccant dehumidifier with CFD model," Applied Energy, Elsevier, vol. 194(C), pages 399-409.
    5. Su, Wei & Lu, Zhifei & She, Xiaohui & Zhou, Junming & Wang, Feng & Sun, Bo & Zhang, Xiaosong, 2022. "Liquid desiccant regeneration for advanced air conditioning: A comprehensive review on desiccant materials, regenerators, systems and improvement technologies," Applied Energy, Elsevier, vol. 308(C).
    6. Wen, Tao & Lu, Lin & Li, Mai & Zhong, Hong, 2018. "Comparative study of the regeneration characteristics of LiCl and a new mixed liquid desiccant solution," Energy, Elsevier, vol. 163(C), pages 992-1005.
    7. Cui, X. & Islam, M.R. & Mohan, B. & Chua, K.J., 2016. "Theoretical analysis of a liquid desiccant based indirect evaporative cooling system," Energy, Elsevier, vol. 95(C), pages 303-312.
    8. Xie, Ying & Zhang, Tao & Liu, Xiaohua, 2016. "Performance investigation of a counter-flow heat pump driven liquid desiccant dehumidification system," Energy, Elsevier, vol. 115(P1), pages 446-457.
    9. Mortazavi, Mehdi & Schmid, Michael & Moghaddam, Saeed, 2017. "Compact and efficient generator for low grade solar and waste heat driven absorption systems," Applied Energy, Elsevier, vol. 198(C), pages 173-179.
    10. 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.
    11. Giampieri, Alessandro & Ma, Zhiwei & Ling-Chin, Janie & Bao, Huashan & Smallbone, Andrew J. & Roskilly, Anthony Paul, 2022. "Liquid desiccant dehumidification and regeneration process: Advancing correlations for moisture and enthalpy effectiveness," Applied Energy, Elsevier, vol. 314(C).
    12. 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.
    13. 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.
    14. Elsarrag, Esam & Igobo, Opubo N. & Alhorr, Yousef & Davies, Philip A., 2016. "Solar pond powered liquid desiccant evaporative cooling," Renewable and Sustainable Energy Reviews, Elsevier, vol. 58(C), pages 124-140.
    15. Tao, Wen & Yimo, Luo & Lin, Lu, 2019. "A novel 3D simulation model for investigating liquid desiccant dehumidification performance based on CFD technology," Applied Energy, Elsevier, vol. 240(C), pages 486-498.
    16. Luo, Jielin & Yang, Hongxing, 2022. "A state-of-the-art review on the liquid properties regarding energy and environmental performance in liquid desiccant air-conditioning systems," Applied Energy, Elsevier, vol. 325(C).
    17. Angrisani, Giovanni & Roselli, Carlo & Sasso, Maurizio, 2015. "Experimental assessment of the energy performance of a hybrid desiccant cooling system and comparison with other air-conditioning technologies," Applied Energy, Elsevier, vol. 138(C), pages 533-545.
    18. Liang, Chenjiyu & Li, Xianting & Zheng, Gonghang, 2022. "Optimizing air conditioning systems by considering the grades of sensible and latent heat loads," Applied Energy, Elsevier, vol. 322(C).
    19. De Antonellis, Stefano & Joppolo, Cesare Maria & Molinaroli, Luca & Pasini, Alberto, 2012. "Simulation and energy efficiency analysis of desiccant wheel systems for drying processes," Energy, Elsevier, vol. 37(1), pages 336-345.
    20. Amaris, Carlos & Vallès, Manel & Bourouis, Mahmoud, 2018. "Vapour absorption enhancement using passive techniques for absorption cooling/heating technologies: A review," Applied Energy, Elsevier, vol. 231(C), pages 826-853.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:energy:v:101:y:2016:i:c:p:229-238. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.