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    A new assessment of combined geothermal electric generation and desalination in western Saudi Arabia: targeted hot spot development

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    Type
    Article
    Authors
    Missimer, Thomas M.
    Mai, Paul Martin cc
    Ghaffour, NorEddine cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Computational Earthquake Seismology (CES) Research Group
    Earth Science and Engineering Program
    Environmental Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2014-07-17
    Permanent link to this record
    http://hdl.handle.net/10754/566066
    
    Metadata
    Show full item record
    Abstract
    High heat flow associated with the tectonic spreading of the Red Sea make western Saudi Arabia a region with high potential for geothermal energy development. The hydraulic properties of the Precambrian-age rocks occurring in this region are not conducive to direct production of hot water for heat exchange, which will necessitate use of the hot dry rock (HDR) heat harvesting method. This would require the construction of coupled deep wells; one for water injection and the other for steam recovery. There are some technological challenges in the design, construction, and operation of HDR geothermal energy systems. Careful geotechnical evaluation of the heat reservoir must be conducted to ascertain the geothermal gradient at the chosen site to allow pre-design modeling of the system for assessment of operational heat flow maintenance. Also, naturally occurring fractures or faults must be carefully evaluated to make an assessment of the potential for induced seismicity. It is anticipated that the flow heat exchange capacity of the system will require enhancement by the use of horizontal drilling and hydraulic fracturing in the injection well with the production well drilled into the fracture zone to maximum water recovery efficiency and reduce operating pressure. The heated water must be maintained under pressure and flashed to steam at surface to produce to the most effective energy recovery. Most past evaluations of geothermal energy development in this region have been focused on the potential for solely electricity generation, but direct use of produced steam could be coupled with thermally driven desalination technologies such as multi-effect distillation, adsorption desalination, and/or membrane distillation to provide a continuous source of heat to allow very efficient operation of the plants. © 2014 © 2014 Balaban Desalination Publications. All rights reserved.
    Citation
    Missimer, T. M., Mai, P. M., & Ghaffour, N. (2014). A new assessment of combined geothermal electric generation and desalination in western Saudi Arabia: targeted hot spot development. Desalination and Water Treatment, 1–8. doi:10.1080/19443994.2014.939868
    Publisher
    Informa UK Limited
    Journal
    Desalination and Water Treatment
    DOI
    10.1080/19443994.2014.939868
    ae974a485f413a2113503eed53cd6c53
    10.1080/19443994.2014.939868
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Environmental Science and Engineering Program; Physical Science and Engineering (PSE) Division; Earth Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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