A new assessment of combined geothermal electric generation and desalination in western Saudi Arabia: targeted hot spot development
Type
ArticleKAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionComputational 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
2014-07-17Permanent link to this record
http://hdl.handle.net/10754/566066
Metadata
Show full item recordAbstract
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:10.1080/19443994.2014.939868Publisher
Informa UK LimitedJournal
Desalination and Water Treatmentae974a485f413a2113503eed53cd6c53
10.1080/19443994.2014.939868