Gemasolar a thermal solar power plant with 15 hours, Ignacio Burgaleta (Torresol Energy)
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Transcript of Gemasolar a thermal solar power plant with 15 hours, Ignacio Burgaleta (Torresol Energy)
11 June 2013, Madrid © Torresol Energy
GEMASOLAR: A THERMAL SOLAR POWER PLANT WITH
15 HOURS OF THERMAL STORAGE SYSTEM
WORKSHOP ON APPLICATIONS OF SOLAR FORECASTING
Juan Ignacio Burgaleta
Director of Technology
© Torresol Energy 2 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
INDEX
1. Torresol Energy
2. The GEMASOLAR Plant
3. Innovations
4. Operation
5. Construction
6. Commercial operation
7. Conclusions
© Torresol Energy 3 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
1. Torresol Energy
• Engineering, consulting, and systems inte-
gration company. Founded in 1956.
• Very active in Solar Energy since 2000. – Technology developer: SENERtrough collector system, Sensol
software, heliostats, heliostat axis drive mechanisms, molten salt
technology (as storage system and as heat transfer fluid) central
tower receiver… amongst many other innovations.
– PSA Tower Prototype
– Turn Key Projects: Andasol 1 & 2, in Granada; Extresol 1, 2
& 3, in Badajoz; one plant in La Garrovilla (Badajoz); one
plant in Alvarado (Badajoz); and two plants in Navalvillar de
Pela (Badajoz).
60% 40%
• 100% “Mubadala Development
Company” stockholding.
• Mubadala Development Company”
belongs to the Abu Dhabi Emirate.
• Goal: development and commer-
cialization of innovative technologies
in renewable, alternative and sus-
tainable energies.
A STRONG ALLIANCE
© Torresol Energy 4 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
1. Torresol Energy
GEMASOLAR
(Tower)
VALLE 1
(PTC)
VALLE 2
(PTC)
© Torresol Energy 5 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
2. The GEMASOLAR Plant
© Torresol Energy 6 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
2. The GEMASOLAR Plant
• Storage system
Solar energy Solar field and
central tower receiver Molten salts
storage system
• Generation system
Molten salts
storage system
Steam
generation
system
Turbine/generator
system Grid
© Torresol Energy 7 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
2. The GEMASOLAR Plant
• High thermal storage capacity (24 hours).
• The same fluid is used for heat transfer and storage.
• The molten salts reach highest temperatures (565ºc) maximizing thermodynamic efficiency.
• The whole piping system is contained in an small area, reducing the heat losses, the
maintenance costs and minimizing the possibility of leaks.
• Lower operation risk (No mobile piping system. No swivel joints. No thermal oil).
• Highest cycle efficiency.
Advantages of Central Tower with Molten Salt Technology
© Torresol Energy 8 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
2. The GEMASOLAR Plant
© Torresol Energy 9 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
3. Innovations (Heliostats)
• High surface (115 m2).
• High optic quality and precision.
• Integrated facet mirror-structure.
• Innovative system of facets union.
• Reduced manufacturing, assembly and
maintenance costs.
Developed by SENER
© Torresol Energy 10 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
3. Innovations (Receiver)
• Optimize size to minimize thermal losses.
• High flow of incident radiation.
• Optimize the design to the maximum temperature
of the metal.
• Thermal maximum efficiency.
• Designed for 25 years of operation.
Solar receiver
Prototype receiver testing in
the PSA of Almería
Receiver Developed by SENER with
PSA-CIEMAT colaboration
© Torresol Energy 11 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
3. Innovations
Solar Field Control System
• Innovative Control system of solar
field composed by 2650 heliostats,
positioned at north, south, east and
west of the tower.
• Optimize the electricity consumption
of the heliostat actuation system.
• Development of a new pointing
strategy that guarantees the good
distribution of the solar flow incident
in the receiver.
• Reduce the time of heliostats de-
focusing. Developed by SENER
© Torresol Energy 12 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
3. Innovations
Molten Salt Storage System
– Tranference fluid and thermal
storage: Nitate molten salts 60%
Na NO3 y 40% KNO3.
– 15 hours of thermal storage
capacity, operating with turbine in
nominal conditions.
– Operatoin tempeature 565.
– Pumping of salts to the receiver
placed in the tower at 140 m.
Power block, molten salt storage system of
the GEMASOLAR Plant
Developed by SENER
© Torresol Energy 13 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
4. Operation
GEMASOLAR Flow Diagram
© Torresol Energy 14 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
4. Operation
GEMASOLAR Daytime Operation
© Torresol Energy 15 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
4. Operation
GEMASOLAR Daytime Operation during Cloudy Periods
© Torresol Energy 16 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
GEMASOLAR Nightime Operation
4. Operation
© Torresol Energy 17 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
5. Construction
Aerial view of the GEMASOLAR Power Block
© Torresol Energy 18 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
5. Construction
© Torresol Energy 19 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
5. Construction
Aerial view of the GEMASOLAR Plant
© Torresol Energy 20 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
6. Commercial Operation
© Torresol Energy 21 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
6. Commercial Operation
• Commissioning activities started November 2010:
− Heliostats calibration.
− Salt molten in a temporary installation and stored in the cold tank (November –
December 2010)
• End of April 2011 plant synchronized.
Start up and Commissioning
© Torresol Energy 22 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
• From early May 2011 providing electricity to the grid.
• End June, 24 hours of uninterrupted electricity production.
• On July 6 2011 performance test, result exceeded theoretical prediction.
• Excellent hourly production predictions.
6. Commercial Operation
© Torresol Energy 23 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
6. Commercial Operation
Starting & Shutting Down the Receiver
• Every day the receiver temperature changes quickly from the environmental conditions till
operation conditions (565ºC)
• Procedures to control all the parameters-components which affect the receiver filling and
drainage developed by Torresol Energy to secure the efficiency and the security (delicate
operation)
• Complex system: Sincronization between Solard Field (heliostats) and the Central
Receiver System (CRS)
• Thermography cameras are part of the control tool for the radiation flow onto the receiver
and are synchronized with the solar field software (heliostats pointing)
© Torresol Energy 24 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
6. Commercial Operation
Starting & Shutting Down the Receiver
• Importance of a good reciever drainage
• The molten salt must be between 260ºC and 565ºC.
• Operational improvements extend the daily
production
• Calibration of the heliostats: Targets located below
the receiver to calibrate the heliostats
© Torresol Energy 25 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
Actual Guarantee
– Receiver Thermal Power 135 MWTh 120 MWTh
– Net Electrical Production 414.3 MWh 302 MWh
– Receiver Outlet Salts Temp. 565 ºC 565 ºC
– Gross Power 19.9 MW 19.9 MW
– Net Power 17.0 MW 17.0 MW
24 h Overall Performance Test passed on July 6th, 2011
6. Commercial Operation
© Torresol Energy 26 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
6. Commercial Operation
Production dates. From 16-08-2011, 00:00 hour to 17-08-2011, 00:00 hour
© Torresol Energy 27 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
6. Commercial Operation
Non-stop operation in Winter time
© Torresol Energy 28 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
6. Commercial Operation
Turbine continuously running at nominal power in summer
© Torresol Energy 29 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
12 DAYS OF CONTINUOUS PRODUCTION
6. Commercial Operation
© Torresol Energy 30 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
7. Next Steps
• We, and most of the analysts, consider that the
technology of Central Tower Plants with Molten Salts
has higher opportunities to achieve the grid parity in
a shorter period of time due to:
− Larger future cost reduction.
− Size to be increased.
− New equipment yet to be developed.
− Affordable construction materials.
• Next Tower Plant with Molten Salt Storage System:
− + 500 MWt receiver ( +12.000 heliostats)
− Storage System capacity depending on Market
requirements
© Torresol Energy 31 11 June 2013, Madrid
GEMASOLAR: A THERMAL SOLAR POWER PLANT
WITH 15 HOURS OF THERMAL STORAGE SYSTEM
7. Conclusions
• GEMASOLAR is the first commercial-scale plant featuring a central tower
molten salt receiver with thermal storage capabilities supplying electricity
to the grid from May 2011.
• The molten salt thermal storage system helps avoid fluctuations in power
supply and enables to produce electricity during 15 hours in the absence
of solar radiation.
• The 19.9 MWe GEMASOLAR Plant became the first CSP ever to
generate uninterrupted electricity for 24 hour at full capacity.
• Next Tower Plant and Molten Salt System with increased power
11 June 2013, Madrid © Torresol Energy
Thank you