18th German Norwegian Energy Forum: Energy Markets in Transition23 October 2014, Norwegian Embassy, Berlin

Balancing Supply and Demand with

Thermal Energy Storage

Christopher J. Greiner, PhD

Senior Engineer & Project Manager, NEST AS

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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

18th German Norwegian Energy Forum: Energy Markets in Transition

Thermal Energy Storage Concept

150 MW

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18th German Norwegian Energy Forum: Energy Markets in Transition

Main Technology Features

150 MW

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Solid-state concrete based storage medium; Heatcrete®

Modular and scalable, from MWhth to 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

18th German Norwegian Energy Forum: Energy Markets in Transition

150 MW

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Discharge Rate and Discharge Duration

18th German Norwegian Energy Forum: Energy Markets in Transition

150 MW

Applications of NEST TES

18th German 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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Electric Thermal Energy Storage (E-TES)

18th German Norwegian Energy Forum: Energy Markets in Transition

Alternative to Pumped Hydro, CAES and Batteries

Steam generator

steam

TES

steam

Peak demand

electricity (20-30%)

(+ ancillary services!)

Hot water for district

heating (60-70%)

Steam generator

steam

Surplus

electricity

(100%)

TESsteam steam

Constant steam supply for

industrial processes (90%+)

Surplus

electricity

(100%)

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CHP

Roadmap

10 kWhth

1 MWhth

10 MWhth

Prototype Pilot Demonstration Commercial

>100 MWhth

18th German Norwegian Energy Forum: Energy Markets in Transition

Proof of

principle8

2013 2014/15 2015/16 2016+2012

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

18th German Norwegian Energy Forum: Energy Markets in Transition

Pilot Project at Masdar City, UAE

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18th German Norwegian Energy Forum: Energy Markets in Transition

1 MWhth rating

Thermal oil HTF

390°C

Operational by Q1-2015

Large-scale Thermal Energy Storage – LS-TES, Project number: 235493/E20

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

18th German Norwegian Energy Forum: Energy Markets in Transition

3rd party verification

SP Technical Research

Institute of Sweden

Norwegian University of Science &

Technology

Comparative Advantages

150 MW

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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)

18th German Norwegian Energy Forum: Energy Markets in Transition

Value Propositions

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Flexible energy storage technology that increases operational flexibility

and reduce operational costs

Versatile solutions from traditional large scale utility projects to smaller

off-grid applications

Cost effective compared to competing electricity and thermal energy

storage technologies

18th German Norwegian Energy Forum: Energy Markets in Transition

150 MW

14CONFIDENTIAL

www.energy-nest.com

Questions?

18th German Norwegian Energy Forum: Energy Markets in Transition