1. 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 , Algeria
LEMI

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

3. 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 ?

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

5. 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)

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

7. Hassi-R’Mel (Algeria) SPP1 performances simulation

9. 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 length/diameter:
4/0.06 m
Solar field area 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

10. Exergy Analyses

11. 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.

12. 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:

13. 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

14. The TRNSYS Simulation Environment

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

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

17. TRNSYS Simulation Libraries

18. STEC Library SolarThermal Electric Components
Components for solar thermal electricity production

20. TRNSYS Hassi R’Mel simulation flowsheet

21. Hassi R’Mel site daily irradiation

22. HTF temperature at solar field outlet

23. daily HTF massflowrate

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

25. 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.

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

27. Thanks for Attention
Kamal Mohammedi* LEMI University M Bougara, Boumerdès , Algeria