IDEAS home Printed from https://ideas.repec.org/a/eee/appene/v278y2020ics0306261920311855.html
   My bibliography  Save this article

A modeling study on a direct expansion based air conditioner having a two-sectioned cooling coil

Author

Listed:
  • Yang, Liu
  • Weng, Wenbing
  • Deng, Shiming

Abstract

In small- to medium- scale buildings such as residences and retails located in hot and humid regions, direct expansion based air conditioning systems are widely used for the control of indoor thermal environment. However, to simultaneously control indoor air temperature and humidity using direct expansion air conditioning systems, additional and costly provisions/installation spaces are usually required. Therefore, to address the inadequacies encountered in previous related studies, based on multi-evaporator technology, a novel direct expansion based air conditioning system having a two-sectioned evaporator or cooling coil (TS-DXAC) was proposed to provide variable dehumidification capacity and improved indoor air distribution. In this paper, the development of a steady-state physics-based mathematical model for the novel TS-DXAC system is presented. The model was developed by referring to the existing sub-models for the key system components, such as a compressor, a condenser and an evaporator, which were currently available in open literature. The developed model was experimentally validated using a purposely established prototype experimental TS-DXAC system, with the differences between experimental and predicted results of less than 6%. Using the validated TS-DXAC model, a follow-up modeling study was carried out on optimizing the sizes of the two sections. The simulation results suggested that a lower surface area ratio for the two sections (Rs) can lead to a larger variation ranges of both output total cooling load (TCC) and equipment sensible heat ratio (E SHR). For example, at the inlet state of 26 °C and 50% relative humidity, when Rs was altered from 1:1 to 1:3, the variation range for TCC was increased by 33%, and that for E SHR by 51%, which was beneficial to better dehumidification.

Suggested Citation

  • Yang, Liu & Weng, Wenbing & Deng, Shiming, 2020. "A modeling study on a direct expansion based air conditioner having a two-sectioned cooling coil," Applied Energy, Elsevier, vol. 278(C).
    • Handle: RePEc:eee:appene:v:278:y:2020:i:c:s0306261920311855
    DOI: 10.1016/j.apenergy.2020.115688
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0306261920311855
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.apenergy.2020.115688?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. Chen, Wenjing & Chan, Ming-yin & Weng, Wenbing & Yan, Huaxia & Deng, Shiming, 2018. "An experimental study on the operational characteristics of a direct expansion based enhanced dehumidification air conditioning system," Applied Energy, Elsevier, vol. 225(C), pages 922-933.
    2. Liu, Weiwei & Lian, Zhiwei & Radermacher, Reinhard & Yao, Ye, 2007. "Energy consumption analysis on a dedicated outdoor air system with rotary desiccant wheel," Energy, Elsevier, vol. 32(9), pages 1749-1760.
    3. Xiao, Fu & Ge, Gaoming & Niu, Xiaofeng, 2011. "Control performance of a dedicated outdoor air system adopting liquid desiccant dehumidification," Applied Energy, Elsevier, vol. 88(1), pages 143-149, January.
    4. Zhang, Zi-Yang & Cao, Xiang & Yang, Zhi & Shao, Liang-Liang & Zhang, Chun-Lu, 2019. "Modeling and experimental investigation of an advanced direct-expansion outdoor air dehumidification system," Applied Energy, Elsevier, vol. 242(C), pages 1600-1612.
    5. Fan, Hongming & Shao, Shuangquan & Tian, Changqing, 2014. "Performance investigation on a multi-unit heat pump for simultaneous temperature and humidity control," Applied Energy, Elsevier, vol. 113(C), pages 883-890.
    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. Homod, Raad Z. & Togun, Hussein & Ateeq, Adnan A. & Al-Mousawi, Fadhel Noraldeen & Yaseen, Zaher Mundher & Al-Kouz, Wael & Hussein, Ahmed Kadhim & Alawi, Omer A. & Goodarzi, Marjan & Ahmadi, Goodarz, 2022. "An innovative clustering technique to generate hybrid modeling of cooling coils for energy analysis: A case study for control performance in HVAC systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 166(C).
    2. Liu, Zichu & Quan, Zhenhua & Zhao, Yaohua & Zhang, Wanlin & Yang, Mingguang & Shi, Junzhang & Bai, Ze, 2023. "Dynamic modelling and performance prediction of a novel direct-expansion ice thermal storage system based multichannel flat tube evaporator plus micro heat pipe arrays storage module," Renewable Energy, Elsevier, vol. 217(C).
    3. Liu, Zichu & Quan, Zhenhua & Zhang, Nan & Wang, Yubo & Yang, Mingguang & Zhao, Yaohua, 2023. "Energy and exergy analysis of a novel direct-expansion ice thermal storage system based on three-fluid heat exchanger module," Applied Energy, Elsevier, vol. 330(PB).

    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. Yew Khoy Chuah & Jun Jie Yang, 2020. "A Integrated Dedicated Outdoor Air System to Optimize Energy Saving," Sustainability, MDPI, vol. 12(3), pages 1-12, February.
    2. Zhang, Ning & Yin, Shao-You & Zhang, Li-Zhi, 2016. "Performance study of a heat pump driven and hollow fiber membrane-based two-stage liquid desiccant air dehumidification system," Applied Energy, Elsevier, vol. 179(C), pages 727-737.
    3. 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.
    4. Rafati Nasr, Mohammad & Kassai, Miklos & Ge, Gaoming & Simonson, Carey J., 2015. "Evaluation of defrosting methods for air-to-air heat/energy exchangers on energy consumption of ventilation," Applied Energy, Elsevier, vol. 151(C), pages 32-40.
    5. 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.
    6. Ángel M. Costa & Rebeca Bouzón & Diego Vergara & José A. Orosa, 2019. "Eco-friendly Pressure Drop Dehumidifier: An Experimental and Numerical Analysis," Sustainability, MDPI, vol. 11(7), pages 1-17, April.
    7. 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.
    8. 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.
    9. Zhang, Tao & Liu, Xiaohua & Jiang, Yi, 2014. "Development of temperature and humidity independent control (THIC) air-conditioning systems in China—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 29(C), pages 793-803.
    10. Ruivo, Celestino R. & Goldsworthy, Mark & Intini, Manuel, 2014. "Interpolation methods to predict the influence of inlet airflow states on desiccant wheel performance at low regeneration temperature," Energy, Elsevier, vol. 68(C), pages 765-772.
    11. Yan, Huaxia & Xia, Yudong & Deng, Shiming, 2017. "Simulation study on a three-evaporator air conditioning system for simultaneous indoor air temperature and humidity control," Applied Energy, Elsevier, vol. 207(C), pages 294-304.
    12. Bi, Yin & Yang, Wansheng & Zhao, Xudong, 2018. "Numerical investigation of a solar/waste energy driven sorption/desorption cycle employing a novel adsorbent bed," Energy, Elsevier, vol. 149(C), pages 84-97.
    13. Angrisani, Giovanni & Roselli, Carlo & Sasso, Maurizio, 2013. "Effect of rotational speed on the performances of a desiccant wheel," Applied Energy, Elsevier, vol. 104(C), pages 268-275.
    14. Ge, Gaoming & Xiao, Fu & Xu, Xinhua, 2011. "Model-based optimal control of a dedicated outdoor air-chilled ceiling system using liquid desiccant and membrane-based total heat recovery," Applied Energy, Elsevier, vol. 88(11), pages 4180-4190.
    15. Baniyounes, Ali M. & Rasul, M.G. & Khan, M.M.K., 2013. "Assessment of solar assisted air conditioning in Central Queensland's subtropical climate, Australia," Renewable Energy, Elsevier, vol. 50(C), pages 334-341.
    16. 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.
    17. Rambhad, Kishor S. & Walke, Pramod V. & Tidke, D.J., 2016. "Solid desiccant dehumidification and regeneration methods—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 59(C), pages 73-83.
    18. Nizetic, S. & Coko, D. & Marasovic, I., 2014. "Experimental study on a hybrid energy system with small- and medium-scale applications for mild climates," Energy, Elsevier, vol. 75(C), pages 379-389.
    19. Jiang, Yuliang & Wang, Xinli & Zhao, Hongxia & Wang, Lei & Yin, Xiaohong & Jia, Lei, 2020. "Dynamic modeling and economic model predictive control of a liquid desiccant air conditioning," Applied Energy, Elsevier, vol. 259(C).
    20. Flavio Muñoz & Ramon Garcia-Hernandez & Jose Ruelas & Juan E. Palomares-Ruiz & Carlos Álvarez-Macías, 2022. "Optimal Operation for Reduced Energy Consumption of an Air Conditioning System Using Neural Inverse Optimal Control," Mathematics, MDPI, vol. 10(5), pages 1-15, February.

    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:appene:v:278:y:2020:i:c:s0306261920311855. 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.elsevier.com/wps/find/journaldescription.cws_home/405891/description#description .

    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.