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Dispatchable Solar Power Meeting the needs of utilities

Solana: The worlds largest parabolic trough solar power plant 280 MWe with 6 hours of thermal energy storage

Solana site location:

The Solana site is located west of Gila Bend, AZ, approximately ~70 miles southwest of Phoenix.

Gila Bend•

Solana Site

Map extent

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Solana Site

• High solar

resource

• Minimal slope

• Proximity to

electric grid

• Proximity to transportation

corridors

• Water availability

• Previously

disturbed land

Siting considerations

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4 Plant Size: 280 MW gross generation, 2 x140 MW turbines, ~250 MW net after station parasitic loads

Solana Power Station

5 Solar Field Size: 2,200,000 m2

Land Area: 3 square miles, formerly agriculture

Solana Power Station

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Thermal Energy Storage (TES): 6 hours of full load operation 2-tank, indirect, molten-salt TES

Six parallel TES trains

Solana Power Station

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Solar field

Power block Thermal Energy Storage

Heat transfer fluid system

Parabolic trough process flow diagram with indirect Thermal Energy Storage

Solana Power Station

Solana Power Station

Warm-up Charging Thermal Energy Storage Electric Power Generation Charge TES & Power Generation Power Generation from TES

Heat Transfer Fluid System

Parabolic trough process flow diagram with indirect Thermal Energy Storage

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Solana Power Station

Aerial view of the Power Block

TES

Unit #2 Unit #1

HTF Area

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Solana Power Station

Storage allows improved operational flexibility to meet utility peak loads. APS system peaks:

Summer Peak: 12 Noon to 8pm, June - September

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Summer Production Profiles

Electricity demand (not scaled) Solar Radiation (not scaled) CSP plant generation

Solana Power Station

Storage allows improved operational flexibility to meet utility peak loads. APS system peaks:

Winter Peak: Early morning, evening

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Winter Production Profiles

Electricity demand (not scaled) Solar Radiation (not scaled) CSP plant generation

Economic benefits

Jobs

Over 2,000 jobs during construction

phase

Over 85 skilled jobs during operation

Total Arizona benefit

Over $1B in direct investment

$300M to $400M in 30-year tax

revenues

Solana’s economic benefits

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Over 3,000 indirect jobs.

Mirror factory in Surprise,

Helps curb Arizona’s annual

$10B energy dollar outflow

Annual emissions abated:

Over 475,000 tons carbon dioxide

1,065 tons of nitrogen oxides

520 tons of sulfur dioxide

This is the equivalent to removing almost 80,000 cars from the road each year, or half the vehicles that travel on Phoenix’s State Route 60 every day.

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Environmental benefits

Previously disturbed farm land is an ideal choice

Water use by land activity The power plant is being built on

developed land that was

previously used for agriculture.

Solana will replace an alfalfa

farm, significantly reducing water

consumption.

30,000

25,000

20,000

15,000

10,000

5,000

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Alfalfa farm 30,000

Solana 3,000

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Components Mirrors, collector assembly Perimeter fence/grading, pond Thermal Storage foundation Steel tanks Substation/transmission lines IT controls Feed water vessels Pump motors Heat Transfer Fluid and pumps Pressure heaters Thermal Storage Equipment Receiver tubes Ball joint assemblies Water treatment equipment Collector foundations Cooling / condensing system Night HTF pumps Hydraulic drives Piping/insulation

Abengoa supply chain spans the country

29 states and 165 companies

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Let’s have a look at it!