Combined solar organic Rankine cycle with reverse osmosis desalination process: Energy, exergy, and cost evaluations

Organic Rankine cycles (ORC) have unique properties that are well suited to solar power generation. In this work design and performance calculations are performed using MatLab/SimuLink computational environment. The cycle consists of thermal solar collectors (Flat Plate Solar Collector (FPC), or Par...

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Bibliographic Details
Published in:Renewable energy 2010-11, Vol.35 (11), p.2571-2580
Main Authors: Nafey, A.S., Sharaf, M.A.
Format: Article
Language:English
Subjects:
Applied sciences
Cost analysis
Desalination
Destruction
Drinking water and swimming-pool water. Desalination
Energy
Energy, exergy and cost analyses
Energy. Thermal use of fuels
Engines and turbines
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Equipments, installations and applications
Exact sciences and technology
Exergy
Matlab
Natural energy
Organic working fluids
Pollution
Reverse osmosis
Solar collectors
Solar energy
Solar organic Rankine cycle (ORC)
Solar thermal conversion
Toluene
Water treatment and pollution
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Summary:Organic Rankine cycles (ORC) have unique properties that are well suited to solar power generation. In this work design and performance calculations are performed using MatLab/SimuLink computational environment. The cycle consists of thermal solar collectors (Flat Plate Solar Collector (FPC), or Parabolic Trough Collector (PTC), or Compound Parabolic Concentrator (CPC)) for heat input, expansion turbine for work output, condenser unit for heat rejection, pump unit, and Reverse Osmosis (RO) unit. Reverse osmosis unit specifications used in this work is based on Sharm El-Shiekh RO desalination plant. Different working fluids such as: butane, isobutane, propane, R134a, R152a, R245ca, and R245fa are examined for FPC. R113, R123, hexane, and pentane are investigated for CPC. Dodecane, nonane, octane, and toluene are allocated for PTC. The proposed process units are modeled and show a good validity with literatures. Exergy and cost analysis are performed for saturation and superheated operating conditions. Exergy efficiency, total exergy destruction, thermal efficiency, and specific capital cost are evaluated for direct vapor generation (DVG) process. Toluene and Water achieved minimum results for total solar collector area, specific total cost and the rate of exergy destruction.
ISSN:0960-1481
1879-0682
DOI:10.1016/j.renene.2010.03.034