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Al Jubayl, Saudi Arabia

Kouta A.,King Fahd University of Petroleum and Minerals | Al-Sulaiman F.,King Fahd University of Petroleum and Minerals | Atif M.,King Fahd University of Petroleum and Minerals | Marshad S.B.,Saline Water Conversion Corporation
Energy Conversion and Management | Year: 2016

In this study, performance and cost analyses are conducted for a solar power tower integrated with supercritical CO2 (sCO2) Brayton cycles for power production and a multiple effect evaporation with a thermal vapor compression (MEE-TVC) desalination system for water production. The study is performed for two configurations based on two different supercritical cycles: the regeneration and recompression sCO2 Brayton cycles. A two-tank molten salt storage is utilized to ensure a uniform operation throughout the day. From the entropy analysis, it was shown that the solar tower is the largest contributor to entropy generation in both configurations, reaching almost 80% from the total entropy generation, followed by the MEE-TVC desalination system, and the sCO2 power cycle. The entropy generation in the two-tank thermal storage is negligible, around 0.3% from the total generation. In the MEE-TVC system the highest contributing component is the steam jet ejector, which is varying between 50% and 60% for different number of effects. The specific entropy generation in the MEE-TVC decreases as the fraction of the input heat to the desalination system decreases; while the specific entropy generation of the sCO2 cycle remains constant. The cost analysis performed for different regions in Saudi Arabia and the findings reveal that the regions characterized by the highest average solar irradiation throughout the year have the lowest LCOE and LCOW values. The region achieving the lowest cost is Yanbu, followed by Khabt Al-Ghusn in the second place, and the rest are as follows, Jabal Al-Rughamah, Jizan, Al-Khafji, and Dhahran. The LCOE of Yanbu at a fraction of 0.5 for the regeneration and recompression solar cogeneration cycles are 0.0915 $/kW h and 0.0826 $/kW h, respectively. © 2016 Elsevier Ltd. All rights reserved. Source

Tribollet B.,University Pierre and Marie Curie | Kittel J.,French Institute of Petroleum | Meroufel A.,French Institute of Petroleum | Meroufel A.,Saline Water Conversion Corporation | And 3 more authors.
Electrochimica Acta | Year: 2014

In H2S containing solutions, the reduction of protons with a buffer effect contributing to the transport of protons at the steel surface, is not sufficient to explain the cathodic polarization curves obtained on 316L stainless steel. An additional electrochemical reaction was observed and was attributed to a direct H2S reduction. A numerical model is presented with these hypotheses and a good agreement is found with the experimental data presented in a previous paper. With this model it is also possible to present the concentration profiles of the different species involved in the cathodic process. ©2013 Elsevier Ltd. All rights reserved. Source

Al-Hamzah A.A.,Saline Water Conversion Corporation | Fellows C.M.,The New School
Desalination | Year: 2015

Seawater from the Arabian Gulf was heated under conditions simulating those of thermal desalination processes and the change in the amount of aquated Ca2+ followed over time using Inductively Coupled Plasma/Optical Emission Spectroscopy. This was done in the absence of any scale inhibitor, and in the presence of scale inhibitors: three commercial polycarboxylate products commonly employed in thermal desalination plants and four novel poly(acrylic acid) inhibitors of differing molar masses and end-group functionality. At times >2min, the novel poly(acrylic acid) scale inhibitors of low (~2000) molar mass and moderate (hexyl isobutyrate or cyclohexyl isobutyrate) end-group hydrophobicity were more effective in maintaining the aquated Ca2+ level than any commercial product. © 2014. Source

Al-Hajouri A.A.,Saline Water Conversion Corporation | Al-Amoudi A.S.,Saline Water Desalination Research Institute | Farooque A.M.,Saline Water Desalination Research Institute
Desalination and Water Treatment | Year: 2013

Saline Water Conversion Corporation is the pioneer in developing applications and operation of nanofiltration (NF) pretreatment for seawater desalination which was developed by its research arm, namely, the Saline Water Desalination Research Institute. Initial work on a pilot plant scale, resulted in its application in one of the commercial seawater reverse osmosis (SWRO) plants at Ummlujj currently in operation since September 2000. During this long term of operation of NF-SWRO system, a number of improvements were made on the system operation based on operational experiences as well as research, which ultimately resulted in smooth operation of the same. This long-term operation revealed that it is possible to operate NF at 65% recovery at pH= 6 utilizing only low feed pressure of <25 bar. This led to increase in SWRO production by 42%. Also, no chemical cleaning or membrane replacement was required for SWRO membranes. These achievements make the NF-SWRO process economically attractive and feasible. This paper provides an overview of long-term operation of NF-SWRO plant as well as different research programs which were undertaken and results obtained following the application of the same. Major obstacles in the smooth operation of the NF pretreatment and future direction of improvement and research to be adopted are also addressed. © 2013 Desalination Publications. All rights reserved. Source

Hamed O.A.,Saline Water Conversion Corporation
Desalination and Water Treatment | Year: 2016

A comprehensive thermo-economic study based on the exergy accounting method is conducted to evaluate the performance of a combined gas/steam power generation system integrated with a hybrid multistage flash (MSF)/sea water reverse osmosis (SWRO) desalination plants. The plant consists of five combined power generation cycles. Each cycle incorporates, two gas turbines (GT), two heat recovery steam generators, and one steam turbine. The total power generated is 2,645.5 MW. The combined power generation cycles are integrated with a hybrid MSF/SWRO desalination plant with a total water production of 1,000,000 m3/d, of which 70% is produced by MSF and 30% by SWRO. The exergy accounting study revealed that the heat rate of the combined gas/steam power cycle is 6,388.94 kJ/kWh, corresponding to an overall thermal efficiency of 56.34%. On the other hand, the water specific fuel energy consumption of the hybrid SWRO/MSF plant is 33.74 kWh/m3. The suggested exergy cost accounting method shows the water unit production cost varying from $0.8258/m3 to $2.259/m3 and the per unit electricity generation cost varying from $0.02266/kWh to $0.0966/kWh, as the oil price is increased from $6/bbl to $72/bbl, respectively. © 2016 Balaban Desalination Publications. All rights reserved. Source

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