LEMI University M Bougara, Boumerdès 35000, Algeria Performances Simulation and Exergy Analysis of an Integrated Solar Combined Cycle System Power Plant in Algeria. Kamal Mohammedi LEMI University M Bougara, Boumerdès 35000, Algeria email : mohammedik@yahoo.com LEMI

OUTLINE Introduction to Solar Thermal Power Production in MENA The Hassi R’Mel SPP1 Energy and Exergy Analyses TRNSYS Simulation Conclusion

1.6 billion people not connected to National electricity grids, Peak load shaving, CO2 mitigation, overconsumption of electricity…….. 1.6 billion people not connected to National electricity grids, most of them living in remote sunny arid areas (Pb of water)in Third World Countries. Is CSP the solution to water poverty ?

CSP projects in Algeria + Alsol1: solar tower project with CDER and Germany

Solar thermal vs other Renewable Energy Resources in EUMENA Every 10 km² in MENA yield 15 million barrels of fuel oil per year in form of solar energy from DLR Solar Energy (250) (Typical Yield in GWhel/km²/y)

Integrated Solar Combined Cycle Thermal Power Plants in Algeria Tower vs PTC

Hassi-R’Mel (Algeria) SPP1 performances simulation

Characteristics: Latitude, Longitude, Altitude 33.8°North, 3°East, 776 m Solar field parameters: PTC Luz (USA) length/diameter: LS-2 10.75 /5.6 m LS-3 10.30 /6.2 m Receiver Schott PTR-70 length/diameter: 4/0.06 m Solar field area 1831 20 m2 Number of lines 56 (LS-2: 52 / LS-3: 4) Number of collectors in each row 6 HTF Therminol VP-1 synthetic oil HTF inlet / outlet temperature 290/ 393 °C Combined cycle: Gas turbines Siemens SGT 800 Steam turbine Siemens STT 900

Exergy Analyses

Exergy (also called Available Energy or Work Potential): Exergy Analysis Some Definitions: Exergy (also called Available Energy or Work Potential): the maximum useful work that can be obtained from a system at a given state in a given environment; in other words, the most work you can get out of a system Dead State: when a system is in thermodynamic equilibrium with the environment, denoted by a subscript zero; at this point no more work can be done Exergy analysis is mainly used for system optimization. By analyzing the exergy destroyed by each component in a process, we can see where we should be focusing our efforts to improve system efficiency. It can also be used to compare components or systems to help make informed design decisions.

Exergy balance : Exergy : Exergy destruction : Exergy efficiency: The exergy is destroyed in the different components of a cycle or a process due to: irreversibilities, temperature gradients, mechanical friction, viscous dissipation, chemical reactions, etc. (1) Exergy balance : Exergy : Exergy destruction : Exergy efficiency:

Exergy destruction in the solar/gas power plant. Component (MW) Compressor 13,931 Combustor 127,869 Gas Turbine 20,386 High Pressure Turbine 2,895 Low Pressure Turbine 22,485 Steam Generator (HRSG) 66,871 Feeding pump 0,048 Aerocondenser 9,966 Solar field 61,3 Total Exergy-Power destruction 325,751

The TRNSYS Simulation Environment

TRNSYS stands for « TRaNsient SYstem Simulation » is a complete and extensible environnement, dedicated to dynamic simulation of systems.

TRNSYS Simulation Environment Advantages: Focus on Modelling and not on Programming Reusable models Concerns: Develop Libraries

TRNSYS Simulation Libraries

STEC Library SolarThermal Electric Components Components for solar thermal electricity production

TRNSYS Hassi R’Mel simulation flowsheet

Hassi R’Mel site daily irradiation

HTF temperature at solar field outlet

daily HTF massflowrate

Daily GT and ST Power production (kW) (1st May)

Conclusions The ISCCS performances under Hassi R’Mel climatic conditions offers an effective way for converting solar energy into electricity. A numerical simulation of the solar field and power cycle has been performed using the STEC library under TRNSYS environment. The computation of the exergy losses in the plant shows that most of the irreversibilities occurs in the gas turbine cycle, the steam generator and the parabolic trough collectors. Results show that the combined cycle mode can produce about 134 MW with efficiency equals to 57.5%. When the power plant operates within solar input, the overall net efficiency is higher than the efficiency of the combined cycle mode by 16.5% at the design point.

Energy-Exergy-Emergy Combined Perfcormances Analyses using real data Design and Life cycle assessment under IPSEpro Environment Architecture

Thanks for Attention Kamal Mohammedi* LEMI University M Bougara, Boumerdès 35000, Algeria email : mohammedik@yahoo.com