Balancing Supply and Demand with Thermal Energy Storage Dr. Christopher Greiner, Senior Engineer, Nest AS

1. 18thGerman Norwegian Energy Forum: Energy Markets in Transition23 October 2014, Norwegian Embassy, BerlinBalancingSupply and DemandwithThermalEnergy Storage
Christopher J. Greiner, PhD
Senior Engineer & Project Manager, NEST AS
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2. Company Summary
150 MW
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NEST AS –a Norwegian technology company incorporated January 2011
Head office located in Billingstad, outside Oslo, Norway
Sales & Marketing office in Houston, Texas, USA
Development & commercialization of New Energy Storage Technology
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3. Thermal Energy Storage Concept
150 MW
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4. Main Technology Features
150 MW
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Solid-state concrete based storage medium; Heatcrete®
Modular and scalable, from MWhthto GWhth
Multiple Heat Transfer Fluids; thermal oil, water/steam, gases, etc.
High temperature applications; up to 450°C or higher
High round trip thermal efficiency (>95%)
Inexpensive and readily available raw materials that can be sourced locally
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5. 150 MW
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Discharge Rate and Discharge Duration
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6. 150 MW
Applications of NEST TES
18thGerman Norwegian Energy Forum: Energy Markets in Transition
Concentrated Solar Power (CSP)
Electricity generation
Desalination of seawater
Enhanced oil recovery
Remote mining operations
Etc.
Electric Thermal Energy Storage (E-TES): Convert surplus electric energy to heat, store, and later provide as electricity and/or heat
Other
Conventional thermal power plants. Start-up
Industrial waste heat: Balance load, waste heat to electricity
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7. Electric Thermal Energy Storage (E-TES)
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Alternative to Pumped Hydro, CAES and Batteries
Steam generator
steam
TES
steam
Peak demandelectricity(20-30%)
(+ ancillaryservices!)
Hot water for districtheating(60-70%)
Steam generator
steam
Surpluselectricity(100%)
TES
steam
steam
Constantsteam supplyfor industrialprocesses(90%+)
Surpluselectricity(100%)
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CHP

8. Roadmap
10 kWhth
1 MWhth
10 MWhth
Prototype
Pilot
Demonstration
Commercial
>100 MWhth
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Proofofprinciple 8
2013
2014/15
2015/16
2016+
2012

9. Prototype Testing
150 MW
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Successfully completed integrity testing at 300°C
Mixing, casting and curing of Heatcrete®
No signs of cracking or separation
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10. Pilot Project at MasdarCity, UAE
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1 MWhthrating
Thermal oil HTF
390°C
Operational by Q1-2015
Large-scale Thermal Energy Storage –LS-TES, Project number: 235493/E20

11. Storage Medium: Heatcrete®
150 MW
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Being developed in cooperation with Heidelberg Cement since 2012
Novel cement mix & aggregate composition
State-of-the-art thermal performance
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3rdparty verification
SP Technical Research Institute of Sweden
Norwegian University of Science & Technology

12. Comparative Advantages
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Scalable–module-based, customizable, fit-to-purpose
Adaptable–suitable for high level of local content
Durable–solid-state storage medium (no degradation)
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13. Value Propositions
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Flexibleenergy storage technology that increases operational flexibility and reduce operational costs
Versatilesolutions from traditional large scale utility projects to smaller off-grid applications
Cost effective compared to competing electricity and thermal energy storage technologies
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14. 150 MW
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CONFIDENTIALwww.energy-nest.com
Questions?
18thGerman Norwegian Energy Forum: Energy Markets in Transition