existing knowledge at sterg -future and strategic...
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Fakulteit Ingenieurswese••••
Faculty of Engineering
Existing knowledge at STERG
- future and strategic plans
Prof. Dr.-Ing. Frank Dinter
18 July 2013
Existing knowledge on Solar Thermal Energy
Since June 2013 Prof. Dr.-Ing. Frank Dinter in STERG
• Former Technical Director of Andasol 3, Spain and Head of Solar at RWE Innogy, Germany
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Andasol 3: Facts & Figures
� Owner: Marquesado Solar S.L. Location: Aldeire/La Calahorra (Granada, Spain)
� Capacity: 50 MWel Forecasted electricity production: ~200 GWh/a
� Commissioning in autumn 2011 Annual CO2 savings: 150,000 tonnes
� Size of the collector area: ~ 500,000 m²
� Technology: Parabolic trough incl. 7.5h molten salt storage
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POOL PRICES(€/MWH)
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POOL PRICES(€/MWH)
Economic value of CSP with Storage
01.07.2012 (Sunday)
02.07.2012 (Monday)
DNI > 4 KWh/m2
DNI > 4 KWh/m2
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Wh]
POOL PRICES(€/KWH) POWER S5 (MW) HOT SALT TANK LEVEL(%) DNI (W/m2)
01.07.2012
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Economic value of CSP with Storage
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Economic Value of CSP with Storage
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POWER S5 (MW) POWER S5 (MW) cumulated pool-revenues cumulated pool-revenues
Energy output 633 MWh
Energy shifted 50 MWh 8.0 %
∆Revenues 1.500 € 5.3 %
01.07.2012
Power - shifted (MW) Power – regular (MW)
Existing knowledge on Solar Thermal Energy
� Concentrating Solar Power (CSP) comes in different forms
� Solar radiation is concentrated and produces heat
� This heat can be stored so that electricity can be produced 24 h per day or when demand is high (dispatch-able energy)
� South Africa is one of the best places in the world for using solar energy
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CSP in general:
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CSP technologies I
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Source: German Aerospace Center
Parabolic Trough
� Uses parabolic mirrors to concentrate solar radiation on linear tube receiver
� Provides heat storage capabilities
� Is a long-term, commercially proven technology
� Has high maturity level, operational experience, modularity and a large number of providers
Source: Solar Millenium
Source: Energy Next
CSP technologies II
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Solar Tower
� Concentrates solar radiation on a point receiver at the top of a tower
� Enables operation at high temperature level and provides heat storage capabilities
� Has high net solar to electrical efficiency and is a commercially proven technology
Source: European Commission
Source: Abengoa Solar
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CSP technologies III
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Dish Stirling
Source: Stirling Energy Systems
Source: Stirling Energy Systems
� Uses parabolic dish to concentrate solar radiation on a Stirling engine
� Has high net solar to electrical efficiency with low water consumption
� Is highly modular and suitable for both small stand-alone, decentralized off-grid power systems and large grid-connected power systems
CSP technologies IV
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Source: Green Rihno Energy
Source: Novatec Solar
Linear Fresnel
� Uses flat mirror design to concentrate sun, enabling simpler production and installation
� Enables other industrial uses such as steam processing
� Has high land-to-electricity ratio due to linear design and the usability of space below support structure
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Source: DLR
The main advantage of CSP technology against other RES as PV or wind power is the capability to provide dispatch-able power by storing solar energy through thermal energy storage
Flexible and
predictable
electricity
generation
Dispatch-able Energy
Existing knowledge on Solar Thermal Energy
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STERG Group at SU
� A good base with own labs
� Moving forward by improving methods and understanding the technology more deeply
� Growing networking in SA and worldwide(SASTELA, SASEC, SolarPACES, DLR, Sandia, NREL, etc.)
� Reducing costs, increasing efficiency and reliability in CSP technology
� Strengthening our relationship to CSIR
� Joining and enabling other SA universities in doing more CSP R&D
� Supporting national solar R&D plans (roadmaps and centres)
� Contract R&D for clients and commercialization
Strategic activities for STERG
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Specific technology focus on:
� Central Receiver Systems with different Heat Transfer Fluids (e.g. liquid salt, liquid metals and air)
� Parabolic Trough with liquid salt
� Thermal Energy Storage Systems with different HTF
� Component development in Solar fields (Heliostats and Trough)
� Optimization on Balance of Plant(Equipment and Process)
� Technical and economical evaluation of CSP technologies
Potential future strategic focus areas
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View to the world:
� SA is one of the best sun spots in the world
� Current situation in Europe and US gives SA a chance to catch up
� CSP can deliver dispatch-able energy and support SA electricity production reliably
� Creating new jobs for new talents for a CSP rollout in SA and worldwide
� CSP awareness is improving in government
Outlook
