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Analytical solution and experimental measurements for temperature distribution prediction of three-phase direct-contact condenser

Author

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  • Mahood, Hameed B.
  • Sharif, A.O.
  • Al-Aibi, S.
  • Hawkins, D.
  • Thorpe, R.

Abstract

An experimental and analytical investigation for the temperature distribution prediction of a three-phase bubble-type direct-contact condenser conducted, using a short Perspex column with 4 cm internal diameter and 70 cm height as a direct contact condenser. Vapour pentane and water were exploited as dispersed phase and continuous phase respectively. The effect of mass flow rate ratio (43.69%, 22.97%, 12.23%, 8.61% and 6.46%) and initial dispersed phase temperature (37.6 °C, 38.4 °C and 41.7 °C) on the direct contact condenser output were studied. Linear temperature distributions along direct contact condensers were found experimentally, except at mass flow rate ratio 43.69% and with less magnitude at 22.97%, for different initial vapour temperatures, while theoretically this behaviour is purely linear. The results showed that the mass flow rate ratio and the hold up have a dominant effect on the direct contact condenser output. On the other hand, the initial vapour temperature had a slight effect on the direct contact condenser output temperature which indicates that the latent heat is controlled in the exchange process. The analytical model is based on the one-dimensional mass and energy equations. New expressions for average heat transfer coefficient and two-phase bubbles relative velocity are derived implicitly. Furthermore, the model correlated very well against experimental data obtained.

Suggested Citation

  • Mahood, Hameed B. & Sharif, A.O. & Al-Aibi, S. & Hawkins, D. & Thorpe, R., 2014. "Analytical solution and experimental measurements for temperature distribution prediction of three-phase direct-contact condenser," Energy, Elsevier, vol. 67(C), pages 538-547.
    • Handle: RePEc:eee:energy:v:67:y:2014:i:c:p:538-547
    DOI: 10.1016/j.energy.2013.12.026
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    Cited by:

    1. Wang, Yiping & Fu, Hailing & Huang, Qunwu & Cui, Yong & Sun, Yong & Jiang, Lihong, 2015. "Experimental study of direct contact vaporization heat transfer on n-pentane-water flowing interface," Energy, Elsevier, vol. 93(P1), pages 854-863.
    2. Paweł Madejski & Piotr Michalak & Michał Karch & Tomasz Kuś & Krzysztof Banasiak, 2022. "Monitoring of Thermal and Flow Processes in the Two-Phase Spray-Ejector Condenser for Thermal Power Plant Applications," Energies, MDPI, vol. 15(19), pages 1-22, September.
    3. Fei, Yu & Xiao, Qingtai & Xu, Jianxin & Pan, Jianxin & Wang, Shibo & Wang, Hua & Huang, Junwei, 2015. "A novel approach for measuring bubbles uniformity and mixing efficiency in a direct contact heat exchanger," Energy, Elsevier, vol. 93(P2), pages 2313-2320.

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