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Simulation study on a three-evaporator air conditioning system for simultaneous indoor air temperature and humidity control

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  • Yan, Huaxia
  • Xia, Yudong
  • Deng, Shiming

Abstract

A multi-evaporator air conditioning (MEAC) system, which may also be called a multi-split air conditioning system or variable refrigerant flow system in the open literature, may be regarded as one of the energy conscious air conditioning applications. However, most MEAC systems currently focus on air temperature control only, so that the potential of using MEAC system in achieving energy saving has not yet been fully utilized. In this paper, based on the previous extensive related research on modeling and controlling both single evaporator air conditioning systems and MEAC systems, a capacity controller for a three-evaporator air conditioning (TEAC) system was developed. Results of simulative controllability tests for the capacity controller demonstrated that, indoor air temperature could be directly controlled using the capacity controller, but indoor relative humidity can be improved and maintained at acceptable levels. Based on the operating characteristics of the TEAC system, the capacity controller was further improved and thus an improved controller was developed. Two tests to verify the performances of the improved controller were conducted. The test results showed that simultaneous indoor air temperature and humidity control of a TEAC system could be achieved using the improved controller.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:appene:v:207:y:2017:i:c:p:294-304
    DOI: 10.1016/j.apenergy.2017.05.125
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    References listed on IDEAS

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    Cited by:

    1. Jianwu Xiong & Linlin Chen & Yin Zhang, 2023. "Building Energy Saving for Indoor Cooling and Heating: Mechanism and Comparison on Temperature Difference," Sustainability, MDPI, vol. 15(14), pages 1-20, July.
    2. Lim, Dae Kyu & Ahn, Byoung Ha & Jeong, Ji Hwan, 2018. "Method to control an air conditioner by directly measuring the relative humidity of indoor air to improve the comfort and energy efficiency," Applied Energy, Elsevier, vol. 215(C), pages 290-299.
    3. Zhang, Zi-Yang & Zhang, Chun-Lu & Xiao, Fu, 2020. "Energy-efficient decentralized control method with enhanced robustness for multi-evaporator air conditioning systems," Applied Energy, Elsevier, vol. 279(C).
    4. Chen, Yi & Yan, Huaxia & Yang, Hongxing, 2018. "Comparative study of on-off control and novel high-low control of regenerative indirect evaporative cooler (RIEC)," Applied Energy, Elsevier, vol. 225(C), pages 233-243.
    5. Mei, Jun & Xia, Xiaohua & Song, Mengjie, 2018. "An autonomous hierarchical control for improving indoor comfort and energy efficiency of a direct expansion air conditioning system," Applied Energy, Elsevier, vol. 221(C), pages 450-463.

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