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Feasibility Study on Variable-Speed Air Conditioner under Hot Climate based on Real-Scale Experiment and Energy Simulation

Author

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  • Jaehun Lim

    (Department of Architectural Engineering, Pusan National University, 2 Busandaehak-ro 63, Geomjeong-gu, Busan 46241, Korea
    Korea Testing Laboratory, 87, Digital-ro, Guro-gu, Seoul 08389, Korea)

  • Myung Sup Yoon

    (Korea Testing Laboratory, 87, Digital-ro, Guro-gu, Seoul 08389, Korea)

  • Turki Al-Qahtani

    (Saudi Standards Metrology and Quality Organization, Al Imam Saud Ibn Abdul Aziz Road, Al Mohammadiyah, Riyadh 11471, Saudi Arabia)

  • Yujin Nam

    (Department of Architectural Engineering, Pusan National University, 2 Busandaehak-ro 63, Geomjeong-gu, Busan 46241, Korea)

Abstract

It is well known that inverter-driven variable-speed compressor (or inverter) air conditioners are more efficient than constant-speed compressor air conditioners. Therefore, most countries have employed part-load assessment test standards such as ISO 16358, EN 14825 and ASHRAE 116 in addition to the conventional ISO 5151 full-load test standard to appropriately evaluate the part-load efficiencies of variable-speed air conditioners. However, many countries in the Middle East and South America still use the ISO 5151 standard owing to policy or high- temperature environmental considerations. In this study, we experimentally verify the energy saving effect of the inverter air conditioner with respect to the constant-speed air conditioner under the Korean climate with distinct temperature changes of four seasons and under the hot climate of Saudi Arabia throughout the year. ISO 5151 defines test conditions for a single temperature, whereas ISO 16358, EN 14825 and ASHRAE 116 simulate seasonal efficiencies using interpolation of several climate test results. Herein, we directly employ the environmental changes during a day or season in a qualified test room with specific dimension. Using extensive regional and seasonal climate data for Saudi Arabia and South Korea, the changes in temperature conditions are applied directly to the outdoor side and appropriate building cooling load conditions are applied to the indoor side of the air-enthalpy-type test room. The energy savings of the inverter air conditioner were analyzed experimentally according to the spatial and temporal temperature changes. The energy reduction effects of the inverter air conditioner largely depended on the temperature and cooling load changes for a day or season. Furthermore, a feasibility study based on an energy simulation showed that the variable-speed air conditioner could be economical even in hot climates.

Suggested Citation

  • Jaehun Lim & Myung Sup Yoon & Turki Al-Qahtani & Yujin Nam, 2019. "Feasibility Study on Variable-Speed Air Conditioner under Hot Climate based on Real-Scale Experiment and Energy Simulation," Energies, MDPI, vol. 12(8), pages 1-14, April.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:8:p:1489-:d:224325
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    References listed on IDEAS

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    1. Wu, Jianghong & Liu, Chaopeng & Li, Hongqi & Ouyang, Dong & Cheng, Jianhong & Wang, Yuanxia & You, Shaofang, 2017. "Residential air-conditioner usage in China and efficiency standardization," Energy, Elsevier, vol. 119(C), pages 1036-1046.
    2. Alrashed, Farajallah & Asif, Muhammad, 2015. "Analysis of critical climate related factors for the application of zero-energy homes in Saudi Arabia," Renewable and Sustainable Energy Reviews, Elsevier, vol. 41(C), pages 1395-1403.
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    2. Angel Andrade & Juan Zapata-Mina & Alvaro Restrepo, 2023. "Assessment of the Correlation between Energy Rating Labeling Regulations and Performance Metrics for Residential Air Conditioning Units: Case Study Variable Type Air Conditioners," International Journal of Energy Economics and Policy, Econjournals, vol. 13(5), pages 432-441, September.
    3. Florin-Emilian Țurcanu & Cătălin-George Popovici & Marina Verdeș & Vasilică Ciocan & Sebastian-Valeriu Hudișteanu, 2020. "Indoor Climate Modelling and Economic Analysis Regarding the Energetic Rehabilitation of a Church," Energies, MDPI, vol. 13(11), pages 1-15, June.
    4. Kashif Irshad & Salem Algarni & Mohammad Tauheed Ahmad & Sayed Ameenuddin Irfan & Khairul Habib & Mostafa A.H. Abdelmohimen & Md. Hasan Zahir & Gulam Mohammed Sayeed Ahmed, 2019. "Microclimate Thermal Management Using Thermoelectric Air-Cooling Duct System Operated at Five Incremental Powers and its Effect on Sleep Adaptation of the Occupants," Energies, MDPI, vol. 12(19), pages 1-25, September.
    5. Sung-An Kim & Kyung-Pyo Hong, 2021. "Analysis and Experimental Verification of a Variable Speed Turbo Air Centrifugal Compressor System for Energy Saving," Energies, MDPI, vol. 14(4), pages 1-11, February.

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