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Multi stage flash desalination plant with brine–feed mixing and cooling

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  • Alhazmy, Majed M.

Abstract

Improving the performance of Multi Stage Flash (MSF) desalination plants is a major objective in the seawater desalination industry. Fresh water production rates from MSF plants depend on the evaporation range defined as the difference between the top brine temperature (TBT) and the bottom stage temperature. Lowering the temperature of the plant bottom stage elongates the evaporation range and increases the yield. A modified multi stage flash plant with brine mixing and cooling (MSF-MC) is presented in this paper. Part of the brine leaving the plant is mixed with fresh seawater feed then cooled to low temperature before it enters the bottom stage feed heater. This MSF-MC features several advantages such as expanded evaporation range at the conventional TBT levels, reduced feed pumping power, moderate levels of chemical treatment requirements and fixed fresh water production rates independent of seasonal seawater conditions. Operating with low feed mass fraction minimizes the cooling load and reduces the cooler size. An improvement in the yield by 1.18%–1.4% for every 1 °C reduction in the plant bottom temperature can be achieved with MSF-MC compared to conventional MSF systems.

Suggested Citation

  • Alhazmy, Majed M., 2011. "Multi stage flash desalination plant with brine–feed mixing and cooling," Energy, Elsevier, vol. 36(8), pages 5225-5232.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:8:p:5225-5232
    DOI: 10.1016/j.energy.2011.06.024
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    References listed on IDEAS

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    1. Alhazmy, Majed M., 2009. "Feed water cooler to increase evaporation range in MSF plants," Energy, Elsevier, vol. 34(1), pages 7-13.
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    Cited by:

    1. Alhazmy, Majed M., 2014. "Economic and thermal feasibility of multi stage flash desalination plant with brine–feed mixing and cooling," Energy, Elsevier, vol. 76(C), pages 1029-1035.
    2. Sharon, H. & Reddy, K.S., 2015. "A review of solar energy driven desalination technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 41(C), pages 1080-1118.
    3. Choi, Soon-Ho, 2017. "Thermal type seawater desalination with barometric vacuum and solar energy," Energy, Elsevier, vol. 141(C), pages 1332-1349.
    4. Chen, Q. & Ja, M. Kum & Li, Y. & Chua, K.J., 2018. "Energy, economic and environmental (3E) analysis and multi-objective optimization of a spray-assisted low-temperature desalination system," Energy, Elsevier, vol. 151(C), pages 387-401.
    5. Lee, Chin-Hyung & Chang, Kyong-Ho, 2013. "Failure pressure of a pressurized girth-welded super duplex stainless steel pipe in reverse osmosis desalination plants," Energy, Elsevier, vol. 61(C), pages 565-574.
    6. Zhang, Hao & Lai, Yanhua & Yang, Xiao & Li, Chang & Dong, Yong, 2022. "Non-evaporative solvent extraction technology applied to water and heat recovery from low-temperature flue gas: Parametric analysis and feasibility evaluation," Energy, Elsevier, vol. 244(PB).

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    2. Sharon, H. & Reddy, K.S., 2015. "A review of solar energy driven desalination technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 41(C), pages 1080-1118.

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