Post on 16-Oct-2020
Implementation of Thermal StorageA Case Study: Gemasolar (24/7)
IntertechPira’s Concentrating Solar Thermal Power 2012
April 19, 2012
Concentrated Solar Thermal Power
• Thermal storage is the differentiator
• Availability: 24/7• Dispatchability• Cost reduction
Founded in 1956, SENER ranks as the largest privately owned engineering company in Spain. The company is recognized for its capacity to deliver innovative and highly complex multidisciplinary projects.
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Owned by the government of Abu Dhabi (UAE) through the Mubadala Development Company, Masdar is committed to developing and delivering future energy solutions.
TORRESOL ENERGY
• SENER Grupo de Ingeniería achieved a sales turnover of 937 M€ and morethan 4.900 employees worldwide.
• SENER has developed important innovations in the field of CSP and isrecognized worldwide as one of the few technological leaders in this field.
• SENER’s vast experience in other areas demonstrates its strong ability toinnovate in different fields:
– Leading player in renewable technologies– Vast experience in process and electric generating plants – Large know-how in petrochemicals, process plants and civil engineering – Design and manufacturing capabilities for high tech mechanisms (aerospace, biomedicine,
etc.)
• SENER has successfully managed other important industrial alliances suchas ITP. ITP is the result of the joint venture between SENER and ROLLS-ROYCE. ITP develops and manufactures jet engines and jet enginecomponents, among other things
SENER AS A GROUP
• Established in April 2006, Masdar (the Abu Dhabi Future Energy Company) is a company focused on the development, commercialization and deployment of renewable energy solutions and clean technologies. As the first major hydrocarbon-producing nation to take such a step, it has established its leadership position by launching the Masdar Initiative, a global cooperative platform for open engagement in the search for solutions to some of mankind's most pressing issues: energy security, climate change and truly sustainable human development.
• Masdar consists of three business units and one investment arm:
Masdar Carbon specializes in developing energy efficiency and clean fossil fuel projects that potentially bring reduction in carbon emissions
Masdar City is a clean technology cluster being developed on the outskirts of Abu Dhabi that is expected to be powered entirely by renewable energy
Masdar Power builds and invests in utility scale renewable energy power projects Masdar Venture Capital manages the Masdar Clean Tech Funds, a series of diversified
venture capital investment vehicles focused on building portfolios of direct investments in clean technology and renewable energy
• Independently of Torresol Energy, MASDAR is developing CSP plants in Abu Dhabi, and their flagship plant “Shams 1” is expected to be completed in the fourth quarter of 2010.
Torresol Energy
Incorporated in March2008.
Based in Madrid, Spain
Total Investment to Date of 940 MM Euro.3 CSP Plants in Operation
World leader in CSP for development and operation of cost effective and efficient solar plants
• 21 units in operation, construction or design• trough and central receiver technologies
• 19.9 to 140 MW14 of them with molten salt (7.5 to 15 hrs)
1,750 km of collector length, 10 Mm2 of reflecting surface
Total capacity:1,100 MW
SENER CSP Experience
Sener is one of the leading Companies in the Concentrated Solar Plant Sector.
As Engineering or EPC Contractor: Full plant construction. Andasol 1 and 2 (2x50 MW CSP with 7.5h Thermal Storage) Extresol 1, 2 and 3 (3x50 MW CSP with 7.5h Thermal Storage) Valle 1 and 2 (2x50 MW CSP with 7.5h Thermal Storage) Gemasolar (20 MW CSP with 15 h Thermal Storage) Termosol 1 and 2 (2x50 MW CSP with 9h Thermal Storage) Samca 1 and 2 (2x50 MW CSP with 7.5h Thermal Storage) USA Genesis (2x140 MW CSP)
As Solar Field Supplier Aste1a and 1b (2x393,000 m2) Soluz Guzmán (315,000 m2) Orellana (405,000 m2)
SENER CSP Experience (Cont.)
Case Study: Gemasolar
• 14 hours of thermal storage via molten salts
• Online since 4/11• Availability: 24/7• Dispatchability• Represents a cost
reduction due to efficiencies relative to trough storage
Central Tower <> High Performance
Daily Radiation
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0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
[W /
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A solar field of heliostats concentrates the irradiance into a molten salts receiver located on the top of a central tower.
Central Tower <> High Performance
Central Tower <> High Performance
Thermal storage allows plant to operate more than 15 hours at its nominal capacity without solar irradiance.
Central Tower <> High Performance
Molten Salts temperature over 550 ºC.
No use of Oil in the Heat Transfer Process.
Central Tower <> High Performance
Tower Technology
Testing the pilot central receiver at Almeria´s PSA
SENER´s design of central tower receiver with molten salts
Tower Technology
SENER heliostat
Field tests for the actuator and control system of the SENER heliostat
Our Gemasolar Plant
3+ Energy
100%Demand curve
24/7Availability
Our Gemasolar Plant
Our Gemasolar Plant
Our Gemasolar Plant
Our Gemasolar Plant
Direct NormalIrradiance [W/m2]
Generator Power Output [MW]
Thermal Energy Stored [MWhth]
Time of day – 24 hours
Spanish Electric Demand
• Winter time: – Typically two peaks of demand at 10.00 and 20.00h (GMT + 1)– Radiation at Gemasolar (GMT + 1) from 9.00 to 18.00 h
• Summer time:– Two peaks of demand at 12.00 and 22.00h (GMT + 2)– Radiation at Gemasolar (GMT +1) from 7.00 to 20.00 h
In both cases the mid-daily demand is supplied by solar radiation. The nightfall demand is supplied by using the molten salt storage system.
Our Gemasolar Plant
One real day: August 16th 2011
Our Gemasolar Plant
One real sequence of days: September 6th to 9th 2011
• High thermal storage capacity. – Due to the storage system, the turbine operation is not immediately affected by a cloud or a
sudden high speed wind. A cloud will affect the production 6-15 hours later.– The turbine would not stop every night. Longer expected life.– The turbine power is manageable. We may choose to reduce the output during the night, at
valley time, to reach 24 h of continuous operation at lower rate.– We maximize the asset utilization.
• Lower operational risk– No mobile piping system. No swivel joints. No thermal oil. No potential fire or spillage risks– All fluids concentrated in a small area. Lower thermal loses and maintenance costs. Self
draining piping.– The same fluid is used for heat transfer and storage. Less thermal interchange
• Highest cycle efficiency– The molten salts reach highest temperatures maximizing thermodynamic efficiency.
Advantages
The Way Ahead
Gemasolar is a breakthrough for solar as it can operate 24/7
Thermal storage + high temperature:Dispatchable and more Cost Competitive
Able to convert stored energy into electricity according to demand, not
environmental conditions
Gemasolar
High Performance CSP
Difference
Not “visionary”. Molten salt trough plants in commercial operation since 2008
And the FUTURE
Gemasolar is the first SENERTower in the world. With 15 hours of storage, it is exceeding operational expectations.
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Total Investment
Debt
Equity 73 M€
171 M€
244 M€
29,9%
70,01%
GemasolarNovember, 2008 – Closed Project Financing
November 2009 ‐ Refinancing
33,33% 33,33%33,33%
0 50 100 150 200 250 300
Total Debt
Remaining Banks
EIB
46,8%
53,2%
80 M€
91 M€
171 M€
Digital Image of Gemasolar
Characteristics Amount
Number of heliostats 2600
Total reflective area(m2) 300
Tower height (m) 140
Turbine power (MWe) 20
Storage size (hours) 15
• Lower costs. – Gemasolar represents the first plant of its type – Next plants will be lower cost :
• Size• Efficiencies• Lessons learned• Improvements in technology
• Regulatory/Client recognition of value of CSP relative to the grid
• Continued Improvements in technology
Next Steps for CSP
Torresol Energy, Inc. (USA)Felicia L. BellowsSenior Vice President of Developmentfelicia.bellows@torresolenergy.comwww.torresolenergy.com
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