Why solar is a good fit for mines:

Pampa Elvira Solar project - Codelco

Who we are?

Strong Track Record:

• Leaders on large scale solar

thermal plants development &

operation.

• Over 24 years of experience in more

than 10 countries.

• ISO 9001 & Solar Keymark Certified.

• More than 220.000 m2 installed all

over the world.

All in “one hand”:

• Owns solar panel factory in Vietnam.

• Annual panel production capacity: 800.000 m2/year.

• Owns heat transmission duct factory: Pipeteq Systems.

Guayacan Power Station

• 12 MW, run-of-river

• Operating since 10/2010

• Registered on CDM

• Develop, implement and operate energy projects.

• Executive team with vast experience in energy projects development

and operation.

• Chilean investors with successful track record on several industries:

• Owners of largest Coca-Cola´s bottler in South America.

• Investments in Finance industry, Health, Construction, Shopping malls,

Telecom, Hotels, Energy, among others.

MAIN PROJECTS

Maipo River:

Guayacán: 12MW – Operating

El Canelo: 16MW – Developing

Water rights: 9MW – Developing

Cautín Basin:

40 MW + 60 km Tx Lines - Developing

Ranco Basin:

Los Venados: 20 MW + 60 km Tx Lines - Developing

Solar thermal project:

Codelco Gaby (32MWt) – Operating

Bio Bio Basin:

San Carlos I 56MW – Developing

San Carlos II 105MW – Developing

• Controls around 10% of the world reserves.

• More than US$30 billions in assets.

• In 2012, produced 1.75 million metric tons of refined copper (10% of world

production).

• 8 operations throughout Chile.

• Gabriela Mistral Division of Codelco bidded for solar heat to EW process.

Main copper producer in the world

• 120 km from nearesty city and 2,660 m.a.s.l.

• 120.000 metrics tons of copper produced in 2012.

• First operation using only autonomous trucks to haul mineral.

• Women account for 23% of the staff (Mining industry average: 6%).

Gabriela Mistral

• Desert conditions.

• 140 kmh (87 mph) - Swirling

winds.

• Dust.

• Hails / Snow.

• Extreme night/day T° variations:

• -15°C / 30°C (5°F / 86°C).

• Earthquakes.

• No water.

Gabriela Mistral

Very harsh weather conditions

Flat plate (Sunmark)

Fresnel Parabolic Trough

Concentration Tower

Not any solar technology fits well in mining

Sunmark: simple & robust

The best fit for mining

Technology Sunmark Parabolic Fresnel

CAPEX optimal high high

OPEX optimal high high

Working Pressure low high high

Moving Parts no yes yes

Operational life over 20 years no track record no track record

Storms (wind, dust, hailstones)

high resistance limited limited

Earthquakes proven resistance not proven not proven

Not any solar technology fits well in mining

Supplying heat to Codelco´s EW process

• Novel business model

• Ownership, Desig, construction, operation & maintenance by heat

supplier.

• PESolar take care of all risks: operational, technical & solar radiation.

• Codelco only pays for the energy used in the process (with a ToP)

with interesting savings on Diesel alternative

Pampa Elvira Solar SpA:

Thermal Power Purchase Agreement:

• Agreement on minimum monthly amount of solar energy delivered.

• We operate and maintain heaters as backup as well as Heat

Exchangers

• 24/7 heat supply.

• Covenants on heat supply quality (Electrolyte Temperature) and

safety.

• Contract length: 10 years.

• Stable energy tariff US$/MWh + Fixed charge heaters O&M.

Thermal Power Purchase Agreement:

Pampa Elvira Solar project Gabriela Mistral, Codelco.

Installation & performance data

• Collectors area : 39.300 m .

• 2.620 15 m panels.

• Annual production: 51.800 MWht.

• Share in annual heat demand: 85%.

• Solar Thermal Battery: 4.300 m .

Key figures

• Diesel savings: 6.500 ton/year + 250 truck travels/year.

• Reducción CO e: 15.000 ton/year.

• Start-up: August 2013.

World largest thermal solar plant

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2

2

3

Solar Thermal Battery

How Pampa Elvira Solar works

• High capacity factor

• Absorbs direct & difuse radiation.

• High resistance to dust & corrosive

environments.

• Resists strong winds, hails & snow.

• Earthquake proof (tested).

• Lifetime > 20 years.

• Easy to clean.

• 99% recyclable.

Our technology

Normal operation

Dust

Production & Effiency

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10

20

30

40

50

60

70

0

5

10

15

20

25

Solar production MWh Effiency %

22,3 MWh 60,47 %

Storage

Main supply, the 13th of September

Implementing the solar plant

Preparing the land

Piping installation

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Piping installation

30

Piping installation

Placing concrete blocks

Placing concrete blocks

Placing concrete blocks

Placing concrete blocks

Mounting the panels

Mounting the panels

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Mounting the panels

Building the heat exchangers room

Building the heat exchangers room

Building the heat exchangers room

Building the heat exchangers room

Building the heat exchangers room

Building the thermal battery

44

Building the thermal battery

Building the thermal battery

Building the thermal battery

Building the thermal battery

Building the thermal battery

The solar plant is ready and…

How it looks like from the air

• Detailed design.

• All in one hand – no intermediaries.

• Strong knowledge in thermo dynamics & mining processes.

• Ahead planning & detailed control during construction.

• Supervising and plant control 24/7.

• Proprietary control software.

Logistics & design = attractive pricing

Key lessons

• Stringent working conditions in Mining industry.

• Safety procedures.

• Medical tests.

• Not any technology fits well in mining environments.

• Very harsh weather conditions.

• Simple and robust technology is needed.

Key lessons

• Need of a knowledgeable & experienced team in

mining & energy industry.

• Best technology, detailed planning & control are key to

succeed.

Supervising and plant control

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24/7 online support control

SUNMARK

Thanks for your attention !