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Performance of two-stage rotary desiccant cooling system with different regeneration temperatures

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  • Ge, T.S.
  • Dai, Y.J.
  • Wang, R.Z.
  • Li, Y.

Abstract

Increasing attention is being given to energy-saving air conditioning technology in recent years. Using natural refrigerant and driven by low grade thermal energy, rotary desiccant cooling system has become a sound alternative solution to conventional vapor compression system. Although one-stage ventilation rotary desiccant cooling system is still the main stream, TSDC (two-stage rotary desiccant cooling) system recently emerges as the latest development, which can be driven by lower regeneration temperature (50–90 °C) compared with one-stage system. In this paper, performance of TSDC with different regeneration temperatures in two stages is analyzed. First integrated mathematical model of TSDC system is established by combing models of different components. Cooling power and COPth (thermal coefficient of performance) are utilized as performance indicators. Then system performance with respect to different combinations of two regeneration temperatures are simulated and discussed, while optimization investigation is also conducted to obtain maximum COPth with same cooling power. Under the simulation condition, results show that cooling power of the system increases with the increase of regeneration temperatures, however, COPth decreases. Also, when the first stage operates in higher regeneration temperature, TSDC system can obtain better performance reflecting in both cooling power and in COPth. Moreover, with the same cooling power provided, COPth of TSDC system obtains a minimum value when temperatures of the two stages approach.

Suggested Citation

  • Ge, T.S. & Dai, Y.J. & Wang, R.Z. & Li, Y., 2015. "Performance of two-stage rotary desiccant cooling system with different regeneration temperatures," Energy, Elsevier, vol. 80(C), pages 556-566.
    • Handle: RePEc:eee:energy:v:80:y:2015:i:c:p:556-566
    DOI: 10.1016/j.energy.2014.12.010
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    References listed on IDEAS

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    1. Ge, T.S. & Dai, Y.J. & Wang, R.Z. & Li, Y., 2008. "Experimental investigation on a one-rotor two-stage rotary desiccant cooling system," Energy, Elsevier, vol. 33(12), pages 1807-1815.
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    4. Khalid, A. & Mahmood, M. & Asif, M. & Muneer, T., 2009. "Solar assisted, pre-cooled hybrid desiccant cooling system for Pakistan," Renewable Energy, Elsevier, vol. 34(1), pages 151-157.
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    Cited by:

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    2. 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).
    3. Cui, X. & Islam, M.R. & Mohan, B. & Chua, K.J., 2016. "Theoretical analysis of a liquid desiccant based indirect evaporative cooling system," Energy, Elsevier, vol. 95(C), pages 303-312.
    4. Cui, X. & Islam, M.R. & Chua, K.J., 2019. "Experimental study and energy saving potential analysis of a hybrid air treatment cooling system in tropical climates," Energy, Elsevier, vol. 172(C), pages 1016-1026.
    5. Gado, Mohamed G. & Ookawara, Shinichi & Nada, Sameh & El-Sharkawy, Ibrahim I., 2021. "Hybrid sorption-vapor compression cooling systems: A comprehensive overview," Renewable and Sustainable Energy Reviews, Elsevier, vol. 143(C).

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