Abengoa is committed to Solar Thermal Electricity (STE) technology for its ability to generate clean energy which adapts to customer demand profile. Tower technology operation is based on the concentration and capture of solar energy for later conversion into electricity through a thermodynamic cycle.

1. Abengoa is an international
company that applies innovative
technology solutions for
sustainability in the energy and
environment sectors. It is
organized into three different
activities: engineering and
construction, concession-type
infrastructures and industrial
production. In engineering and
construction Abengoa has more
than 70 years of experience in the
market, and it specializes in
carrying out complex turn-key
projects.
In the energy sector, Abengoa
develops pioneering projects all
over the world in the solar
thermal, biofuels and conventional
power generation markets. Its
strategic positioning and
capabilities enable it to progress
every day towards its goal of
becoming a world leader in
designing and building energy and
industrial plants, applying
technological and innovative
solutions that contribute to
sustainable development.
STE Tower
Innovative technology solutions
for sustainability
Energía Solar, 1
Palmas Altas
41014 Seville (Spain)
Phone. (+34) 954 93 70 00
www.abengoa.com
Ps10 in Seville, Spain

2. STE Tower Technology Abengoa’s answer
Pioneers in commercial STE tower plant
construction
ABENGOA
Innovation and respect for the environment Clean, dispatchable and efficient
Abengoa bases its competitive construction, concluding in the and benefits. Abengoa also offers
advantage in the solar energy sector operation and maintenance of the turn-key projects for third parties, as
on a vertical integration business projects that it develops. well as the sales of separate
model. Abengoa participates in the components.
value chain from the initial phase, the This model makes Abengoa the only
promotion and financing of the company able to offer the best
projects, through the main nucleus of solutions for each clients needs, with
the project, the engineering and highly competitive deadlines, budgets
Innovative technology solutions for sustainability Capacities and main references
Integration
Engineering Construction O&MManufacturing
& Procurement
Financing
Risk management
Development
Main references
3. Khi Solar One
§
§
§
50 MW +
183,000 t/year of CO avoided2
Upington (South Africa) (*)
2 h of thermal storage
1. PS10
§
§
§
11 MW +40 min of thermal storage
6,000 t/year of CO avoided2
Solucar Complex, Seville (Spain)
2. PS20
§
§
§
20 MW +1 h of thermal storage
12,000 t/year of CO avoided2
Solucar Complex, Seville (Spain)
(*)Under construction
1 2
3 4
4. Atacama 1
§
§
§
110 MW +18
643,000 t/year of CO avoided2
Antofagasta (Chile) (*)
h of thermal storage
The tower technology is based on
concentrating and capturing solar
energy to be turned into electricity
through a thermal dynamic cycle. Using
a circular field of dual-axis mirrors
(heliostats) that follow the sun, the
solar radiation is concentrated on a
receiver located on the top of the
tower. The receiver transfers all the
heat to a heat transfer fluid (HTF), such
as water or molten salts, to produce
steam that runs the conventional steam
turbine to generate electricity.
Abengoa offers highly competitive
proprietary tower technology using
super-heated steam. This technology
can incorporate steam storage systems,
allowing for up to three hours of
production at maximum capacity.
Also, a
thermal storage system can be
integrated into tower plants,
guaranteeing production during long
periods of low radiation or after the
sun goes down.
Our new tower technology using
molten salts represents an important
technological advance. Heating molten
salts in the receiver enables reaching
higher temperatures and efficiencies,
improving the competiveness of solar
energy. The use of molten salts is
optimal for its combination with large
storage systems, which significantly
increases dispatchability.
Abengoa bets on Solar Thermal which has occurred in recent years, Among the different STE technologies,
Electricity (STE) because of its ability to which will make it cost competitive with tower plants stand out for its
generate electric power in a clean and fossil fuels in 2020. STE is the best innovation and distinguishing factors,
dispatchable manner, adapted to the solution that will both meet the goals in which Abengoa is a global pioneer.
specific requirements of the demand, for energy production and, while Tower technology is the youngest of
meeting the needs of the client. The ensuring sustainable development, the commercial STE technologies and it
combination of these two supporting the international objectives has large development potential.
characteristics is unique to this type of of reducing the environmental impact
technology and they provide great in the countries where Abengoa Abengoa, a highly innovative company,
benefits, such as reducing dependence operates. committed to developing their own
on fossil fuels, contributing to grid R&D and considers this technology key
stability and allowing for a higher Of all the renewables, STE has the in achieving competitive prices
penetration of intermittent renewables largest impact in the local economy of compared to conventional sources.
(wind and PV) to be possible into the the country where it is located. It is a
system without expensive battery significant and enduring source of
storage. Also, there is great potential employment, as well as stimulating the
for cost reductions in STE, such as that development of local industries.
Solucar Complex in Seville, Spain

3. STE Tower Technology Abengoa’s answer
Pioneers in commercial STE tower plant
construction
ABENGOA
Innovation and respect for the environment Clean, dispatchable and efficient
Abengoa bases its competitive construction, concluding in the and benefits. Abengoa also offers
advantage in the solar energy sector operation and maintenance of the turn-key projects for third parties, as
on a vertical integration business projects that it develops. well as the sales of separate
model. Abengoa participates in the components.
value chain from the initial phase, the This model makes Abengoa the only
promotion and financing of the company able to offer the best
projects, through the main nucleus of solutions for each clients needs, with
the project, the engineering and highly competitive deadlines, budgets
Innovative technology solutions for sustainability Capacities and main references
Integration
Engineering Construction O&MManufacturing
& Procurement
Financing
Risk management
Development
Main references
3. Khi Solar One
§
§
§
50 MW +
183,000 t/year of CO avoided2
Upington (South Africa) (*)
2 h of thermal storage
1. PS10
§
§
§
11 MW +40 min of thermal storage
6,000 t/year of CO avoided2
Solucar Complex, Seville (Spain)
2. PS20
§
§
§
20 MW +1 h of thermal storage
12,000 t/year of CO avoided2
Solucar Complex, Seville (Spain)
(*)Under construction
1 2
3 4
4. Atacama 1
§
§
§
110 MW +18
643,000 t/year of CO avoided2
Antofagasta (Chile) (*)
h of thermal storage
The tower technology is based on
concentrating and capturing solar
energy to be turned into electricity
through a thermal dynamic cycle. Using
a circular field of dual-axis mirrors
(heliostats) that follow the sun, the
solar radiation is concentrated on a
receiver located on the top of the
tower. The receiver transfers all the
heat to a heat transfer fluid (HTF), such
as water or molten salts, to produce
steam that runs the conventional steam
turbine to generate electricity.
Abengoa offers highly competitive
proprietary tower technology using
super-heated steam. This technology
can incorporate steam storage systems,
allowing for up to three hours of
production at maximum capacity.
Also, a
thermal storage system can be
integrated into tower plants,
guaranteeing production during long
periods of low radiation or after the
sun goes down.
Our new tower technology using
molten salts represents an important
technological advance. Heating molten
salts in the receiver enables reaching
higher temperatures and efficiencies,
improving the competiveness of solar
energy. The use of molten salts is
optimal for its combination with large
storage systems, which significantly
increases dispatchability.
Abengoa bets on Solar Thermal which has occurred in recent years, Among the different STE technologies,
Electricity (STE) because of its ability to which will make it cost competitive with tower plants stand out for its
generate electric power in a clean and fossil fuels in 2020. STE is the best innovation and distinguishing factors,
dispatchable manner, adapted to the solution that will both meet the goals in which Abengoa is a global pioneer.
specific requirements of the demand, for energy production and, while Tower technology is the youngest of
meeting the needs of the client. The ensuring sustainable development, the commercial STE technologies and it
combination of these two supporting the international objectives has large development potential.
characteristics is unique to this type of of reducing the environmental impact
technology and they provide great in the countries where Abengoa Abengoa, a highly innovative company,
benefits, such as reducing dependence operates. committed to developing their own
on fossil fuels, contributing to grid R&D and considers this technology key
stability and allowing for a higher Of all the renewables, STE has the in achieving competitive prices
penetration of intermittent renewables largest impact in the local economy of compared to conventional sources.
(wind and PV) to be possible into the the country where it is located. It is a
system without expensive battery significant and enduring source of
storage. Also, there is great potential employment, as well as stimulating the
for cost reductions in STE, such as that development of local industries.
Solucar Complex in Seville, Spain

4. STE Tower Technology Abengoa’s answer
Pioneers in commercial STE tower plant
construction
ABENGOA
Innovation and respect for the environment Clean, dispatchable and efficient
Abengoa bases its competitive construction, concluding in the and benefits. Abengoa also offers
advantage in the solar energy sector operation and maintenance of the turn-key projects for third parties, as
on a vertical integration business projects that it develops. well as the sales of separate
model. Abengoa participates in the components.
value chain from the initial phase, the This model makes Abengoa the only
promotion and financing of the company able to offer the best
projects, through the main nucleus of solutions for each clients needs, with
the project, the engineering and highly competitive deadlines, budgets
Innovative technology solutions for sustainability Capacities and main references
Integration
Engineering Construction O&MManufacturing
& Procurement
Financing
Risk management
Development
Main references
3. Khi Solar One
§
§
§
50 MW +
183,000 t/year of CO avoided2
Upington (South Africa) (*)
2 h of thermal storage
1. PS10
§
§
§
11 MW +40 min of thermal storage
6,000 t/year of CO avoided2
Solucar Complex, Seville (Spain)
2. PS20
§
§
§
20 MW +1 h of thermal storage
12,000 t/year of CO avoided2
Solucar Complex, Seville (Spain)
(*)Under construction
1 2
3 4
4. Atacama 1
§
§
§
110 MW +18
643,000 t/year of CO avoided2
Antofagasta (Chile) (*)
h of thermal storage
The tower technology is based on
concentrating and capturing solar
energy to be turned into electricity
through a thermal dynamic cycle. Using
a circular field of dual-axis mirrors
(heliostats) that follow the sun, the
solar radiation is concentrated on a
receiver located on the top of the
tower. The receiver transfers all the
heat to a heat transfer fluid (HTF), such
as water or molten salts, to produce
steam that runs the conventional steam
turbine to generate electricity.
Abengoa offers highly competitive
proprietary tower technology using
super-heated steam. This technology
can incorporate steam storage systems,
allowing for up to three hours of
production at maximum capacity.
Also, a
thermal storage system can be
integrated into tower plants,
guaranteeing production during long
periods of low radiation or after the
sun goes down.
Our new tower technology using
molten salts represents an important
technological advance. Heating molten
salts in the receiver enables reaching
higher temperatures and efficiencies,
improving the competiveness of solar
energy. The use of molten salts is
optimal for its combination with large
storage systems, which significantly
increases dispatchability.
Abengoa bets on Solar Thermal which has occurred in recent years, Among the different STE technologies,
Electricity (STE) because of its ability to which will make it cost competitive with tower plants stand out for its
generate electric power in a clean and fossil fuels in 2020. STE is the best innovation and distinguishing factors,
dispatchable manner, adapted to the solution that will both meet the goals in which Abengoa is a global pioneer.
specific requirements of the demand, for energy production and, while Tower technology is the youngest of
meeting the needs of the client. The ensuring sustainable development, the commercial STE technologies and it
combination of these two supporting the international objectives has large development potential.
characteristics is unique to this type of of reducing the environmental impact
technology and they provide great in the countries where Abengoa Abengoa, a highly innovative company,
benefits, such as reducing dependence operates. committed to developing their own
on fossil fuels, contributing to grid R&D and considers this technology key
stability and allowing for a higher Of all the renewables, STE has the in achieving competitive prices
penetration of intermittent renewables largest impact in the local economy of compared to conventional sources.
(wind and PV) to be possible into the the country where it is located. It is a
system without expensive battery significant and enduring source of
storage. Also, there is great potential employment, as well as stimulating the
for cost reductions in STE, such as that development of local industries.
Solucar Complex in Seville, Spain

5. Abengoa is an international
company that applies innovative
technology solutions for
sustainability in the energy and
environment sectors. It is
organized into three different
activities: engineering and
construction, concession-type
infrastructures and industrial
production. In engineering and
construction Abengoa has more
than 70 years of experience in the
market, and it specializes in
carrying out complex turn-key
projects.
In the energy sector, Abengoa
develops pioneering projects all
over the world in the solar
thermal, biofuels and conventional
power generation markets. Its
strategic positioning and
capabilities enable it to progress
every day towards its goal of
becoming a world leader in
designing and building energy and
industrial plants, applying
technological and innovative
solutions that contribute to
sustainable development.
STE Tower
Innovative technology solutions
for sustainability
Energía Solar, 1
Palmas Altas
41014 Seville (Spain)
Phone. (+34) 954 93 70 00
www.abengoa.com
Ps10 in Seville, Spain

6. Abengoa is an international
company that applies innovative
technology solutions for
sustainability in the energy and
environment sectors. It is
organized into three different
activities: engineering and
construction, concession-type
infrastructures and industrial
production. In engineering and
construction Abengoa has more
than 70 years of experience in the
market, and it specializes in
carrying out complex turn-key
projects.
In the energy sector, Abengoa
develops pioneering projects all
over the world in the solar
thermal, biofuels and conventional
power generation markets. Its
strategic positioning and
capabilities enable it to progress
every day towards its goal of
becoming a world leader in
designing and building energy and
industrial plants, applying
technological and innovative
solutions that contribute to
sustainable development.
STE Tower
Innovative technology solutions
for sustainability
Energía Solar, 1
Palmas Altas
41014 Seville (Spain)
Phone. (+34) 954 93 70 00
www.abengoa.com
Ps10 in Seville, Spain