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Transient thermal model of passenger car's cabin and implementation to saturation cycle with alternative working fluids

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  • Lee, Hoseong
  • Hwang, Yunho
  • Song, Ilguk
  • Jang, Kilsang

Abstract

A transient thermal model of a passenger car's cabin is developed to investigate the dynamic behavior of cabin thermal conditions. The model is developed based on a lumped-parameter model and solved using integral methods. Solar radiation, engine heat through the firewall, and engine heat to the air ducts are all considered. Using the thermal model, transient temperature profiles of the interior mass and cabin air are obtained. This model is used to investigate the transient behavior of the cabin under various operating conditions: the recirculation mode in the idling state, the fresh air mode in the idling state, the recirculation mode in the driving state, and fresh air mode in the driving state. The developed model is validated by comparing with experimental data and is within 5% of deviation. The validated model is then applied for evaluating the mobile air conditioning system's design. The study found that a saturation cycle concept (four-stage cycle with two-phase refrigerant injection) could improve the system efficiency by 23.9% and reduce the power consumption by 19.3%. Lastly, several alternative refrigerants are applied and their performance is discussed. When the saturation cycle concept is applied, R1234yf MAC (mobile air conditioning) shows the largest COP (coefficient of performance) improvement and power consumption reduction.

Suggested Citation

  • Lee, Hoseong & Hwang, Yunho & Song, Ilguk & Jang, Kilsang, 2015. "Transient thermal model of passenger car's cabin and implementation to saturation cycle with alternative working fluids," Energy, Elsevier, vol. 90(P2), pages 1859-1868.
    • Handle: RePEc:eee:energy:v:90:y:2015:i:p2:p:1859-1868
    DOI: 10.1016/j.energy.2015.07.016
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    References listed on IDEAS

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    1. Sanaye, Sepehr & Dehghandokht, Masoud & Fartaj, Amir, 2012. "Temperature control of a cabin in an automobile using thermal modeling and fuzzy controller," Applied Energy, Elsevier, vol. 97(C), pages 860-868.
    2. Levinson, Ronnen & Pan, Heng & Ban-Weiss, George & Rosado, Pablo & Paolini, Riccardo & Akbari, Hashem, 2011. "Potential benefits of solar reflective car shells: Cooler cabins, fuel savings and emission reductions," Applied Energy, Elsevier, vol. 88(12), pages 4343-4357.
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    Cited by:

    1. Dominik Dvorak & Daniele Basciotti & Imre Gellai, 2020. "Demand-Based Control Design for Efficient Heat Pump Operation of Electric Vehicles," Energies, MDPI, vol. 13(20), pages 1-18, October.
    2. Daniele Basciotti & Dominik Dvorak & Imre Gellai, 2020. "A Novel Methodology for Evaluating the Impact of Energy Efficiency Measures on the Cabin Thermal Comfort of Electric Vehicles," Energies, MDPI, vol. 13(15), pages 1-16, July.

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