IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v203y2020ics0360544220309671.html
   My bibliography  Save this article

Analytical solutions for the optimal cooling and heating source temperatures in liquid desiccant air-conditioning system based on exergy analysis

Author

Listed:
  • Guan, Bowen
  • Liu, Xiaohua
  • Zhang, Tao

Abstract

In liquid desiccant air-conditioning (LDAC) systems, the same moisture removal amount can be realized by different temperature combinations of cooling and heating sources. However, only limited studies have addressed optimal cooling and heating source temperatures for LDAC systems. In this study, analytical solutions for the optimal cooling and heating source temperatures in LDAC systems are determined under ideal conditions. Under the optimal temperatures, the minimum exergy inputs of the cooling and heating sources are achieved. The accuracy of the analytical solutions is validated based on results obtained from an enumeration method. Two critical conclusions are drawn: (i) for any solution flow rate, there is a set of optimal cooling and heating source temperatures and a minimum exergy input, whereas among different solution flow rates, there is an optimal solution flow rate leading to the minimum exergy input (calculated in this study); and (ii) once the product of the solution mass flow rate and solution specific heat capacity is fixed, the optimal cooling and heating temperatures, states of air and solutions can be uniquely determined, free from the influence of the desiccant solution type. Thus, this study provides a fundamental reference for achieving the best exergy performance in LDAC systems.

Suggested Citation

  • Guan, Bowen & Liu, Xiaohua & Zhang, Tao, 2020. "Analytical solutions for the optimal cooling and heating source temperatures in liquid desiccant air-conditioning system based on exergy analysis," Energy, Elsevier, vol. 203(C).
    • Handle: RePEc:eee:energy:v:203:y:2020:i:c:s0360544220309671
    DOI: 10.1016/j.energy.2020.117860
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544220309671
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2020.117860?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. Guo, Yi & Al-Jubainawi, Ali & Peng, Xueyuan, 2019. "Modelling and the feasibility study of a hybrid electrodialysis and thermal regeneration method for LiCl liquid desiccant dehumidification," Applied Energy, Elsevier, vol. 239(C), pages 1014-1036.
    2. Gurubalan, A. & Maiya, M.P. & Geoghegan, Patrick J., 2019. "A comprehensive review of liquid desiccant air conditioning system," Applied Energy, Elsevier, vol. 254(C).
    3. Su, Bosheng & Han, Wei & Qu, Wanjun & Liu, Changchun & Jin, Hongguang, 2018. "A new hybrid photovoltaic/thermal and liquid desiccant system for trigeneration application," Applied Energy, Elsevier, vol. 226(C), pages 808-818.
    4. 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.
    5. 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.
    6. Yon, Hao Ren & Cai, Wenjian & Wang, Youyi & Shen, Suping, 2018. "Performance investigation on a novel liquid desiccant regeneration system operating in vacuum condition," Applied Energy, Elsevier, vol. 211(C), pages 249-258.
    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. Gao, D.C. & Sun, Y.J. & Ma, Z. & Ren, H., 2021. "A review on integration and design of desiccant air-conditioning systems for overall performance improvements," Renewable and Sustainable Energy Reviews, Elsevier, vol. 141(C).
    2. 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).
    3. Zhang, Kezhen & Zhao, Yongliang & Liu, Ming & Gao, Lin & Fu, Yue & Yan, Junjie, 2021. "Flexibility enhancement versus thermal efficiency of coal-fired power units during the condensate throttling processes," Energy, Elsevier, vol. 218(C).

    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. 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).
    2. Niu, Xiaofeng & Ke, Qing & Wang, Zhaohua & Zhou, Junming & Dong, Honglin & Mahian, Omid, 2023. "Study on the regeneration process and overall performance of a microencapsulated phase change material slurry dehumidification system," Renewable Energy, Elsevier, vol. 216(C).
    3. 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).
    4. Zhang, Wanshi & Wu, Yunlei & Li, Xiuwei & Cheng, Feng & Zhang, Xiaosong, 2021. "Performance investigation of the wood-based heat localization regenerator in liquid desiccant cooling system," Renewable Energy, Elsevier, vol. 179(C), pages 133-149.
    5. Gao, D.C. & Sun, Y.J. & Ma, Z. & Ren, H., 2021. "A review on integration and design of desiccant air-conditioning systems for overall performance improvements," Renewable and Sustainable Energy Reviews, Elsevier, vol. 141(C).
    6. 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).
    7. Liu, Hongdou & Yang, Hongquan & Qi, Ronghui, 2020. "A review of electrically driven dehumidification technology for air-conditioning systems," Applied Energy, Elsevier, vol. 279(C).
    8. Su, Bosheng & Han, Wei & Zhang, Xiaosong & Chen, Yi & Wang, Zefeng & Jin, Hongguang, 2018. "Assessment of a combined cooling, heating and power system by synthetic use of biogas and solar energy," Applied Energy, Elsevier, vol. 229(C), pages 922-935.
    9. Yu, Y. & Yang, H. & Peng, J. & Long, E., 2019. "Performance comparisons of two flat-plate photovoltaic thermal collectors with different channel configurations," Energy, Elsevier, vol. 175(C), pages 300-308.
    10. Cesar Lucio & Omar Behar & Bassam Dally, 2023. "Techno-Economic Assessment of CPVT Spectral Splitting Technology: A Case Study on Saudi Arabia," Energies, MDPI, vol. 16(14), pages 1-23, July.
    11. Cheng, Qing & Zhang, Xiaosong & Jiao, Shun, 2017. "Influence of concentration difference between dilute cells and regenerate cells on the performance of electrodialysis regenerator," Energy, Elsevier, vol. 140(P1), pages 646-655.
    12. 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.
    13. Dong, Hye-Won & Jeong, Jae-Weon, 2022. "Energy and economic analysis of organic Rankine cycle for liquid desiccant system," Energy, Elsevier, vol. 241(C).
    14. 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).
    15. Song, Xia & Zhang, Lun & Zhang, Xiaosong, 2019. "Analysis of the temperatures of heating and cooling sources and the air states in liquid desiccant dehumidification systems regenerated by return air," Energy, Elsevier, vol. 168(C), pages 651-661.
    16. 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).
    17. Hansol Lim & Seong-Yong Cheon & Jae-Weon Jeong, 2018. "Empirical Analysis for the Heat Exchange Effectiveness of a Thermoelectric Liquid Cooling and Heating Unit," Energies, MDPI, vol. 11(3), pages 1-14, March.
    18. Guan, Bowen & Zhang, Tao & Jun, Liu & Liu, Xiaohua, 2020. "Exergy analysis and performance improvement of liquid-desiccant deep-dehumidification system: An engineering case study," Energy, Elsevier, vol. 196(C).
    19. Wang, Xinli & Cai, Wenjian & Yin, Xiaohong, 2017. "A global optimized operation strategy for energy savings in liquid desiccant air conditioning using self-adaptive differential evolutionary algorithm," Applied Energy, Elsevier, vol. 187(C), pages 410-423.
    20. Kumar, Ritunesh & Khan, Rehan & Ma, Zhenjun, 2021. "Suitability of plate versus cylinder surface for the development of low flow falling film liquid desiccant dehumidifiers," Renewable Energy, Elsevier, vol. 179(C), pages 723-736.

    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:203:y:2020:i:c:s0360544220309671. 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.