Solar Thermal Power Tower Technology - CSP · PDF fileSolar Thermal Power Tower Technology ... Future efficiency gains driven by technology roadmap . 10 Power tower: A cost-effective

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Solar Thermal Power

Tower Technology

Yasser Dib CSP Today USA, Las Vegas

June 28, 2012

Providing Utility-Scale, Reliable,

Clean Energy Generation

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BrightSource Energy designs, develops and deploys

concentrating solar thermal technology to produce

high-value steam for electric power, petroleum and

industrial-process markets worldwide.

Introduction

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An Unmatched Legacy in Solar Thermal

1980’s – 1990’s 2007 2006 2008 2009 2011 2010 2012

Solar Energy Generating Systems (SEGS) in Mohave Desert built by company’s original engineering team

Feb 2009 World’s largest solar deal signed: 1.3GW PPA with Southern California Edison (SCE)

2013

Feb 2012 Selected by Sasol for South African Solar Plant design

Ivanpah: CSP Solar Project of the Year (Solar Power Gen USA)

March 2012 Founding member of CSP Alliance

April 2012 Ivanpah: Energy Project of the Year (USC CMAA Green Symposium)

June 2008 SEDC startup – pilot plant proof of concept

April 2008 Signed 900MW PPA with PG&E

Sept 2007 Application for Certification (AFC) of Ivanpah filed with CEC; deemed “DataAdequate”

Oct 2011 Coalinga project delivered to Chevron

April 2011 $2.2 B Ivanpah Project

financial close

Company founded

Oct 2010 Ivanpah approved

to commence construction – boots on the ground

2013 Ivanpah Commencement of Operations:

Unit 1: Q2 (PG&E) Unit 2: Q3 (SCE) Unit 3: Q4 (PG&E)

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BrightSource Power Tower Components

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Heliostats Overview

Two flat glass mirrors (2.3m x 3.3m) mounted

on a single pylon equipped with a computer-

controlled drive system

Heliostat individually positioned to optimize annual plant output and

revenue

Dual-axis tracking significantly increases plant output, particularly in

winter months and late afternoon hours of the day

Low-impact design avoids costly extensive land grading and concrete

pads

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Proprietary Optimization Control Software Overview Solar Field Integration and Control System (SFINCS)

Algorithmic software determines the optimal

position of each heliostat accounting for the unique conditions of each project site

The SFINCS control system manages distribution of energy across the solar receiver using

real-time heliostat-aiming and closed-loop feedback

On-site weather systems, and visual and infrared cameras provide real-time feedback into advanced

algorithms for solar field management

Proprietary optimization and control software maximizes project performance and power

production efficiencies

Infrared Camera System

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Solar Field Optimization

Field layout simulation calculates optimal heliostat

positioning to minimize shading, and maximize

heat concentration on solar receiver

Coordinated field of heliostats enables system to achieve industry-leading

steam temperature and pressure levels

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Solar Receiver Overview

Solar Receiver Steam

Generator (SRSG)

SRSG

Infrared Image

SBMS Temperature

Measurement

Solar Receiver

Superheater

Utility-scale “inside out” boiler heated by reflected

solar radiation

Proprietary coatings for maximum solar energy

absorption

Matches steam output to load demand

Camera and sensors transmit real-time heat levels

to heliostat control system

Flexibility to respond rapidly to cloud cover &

weather changes

SOLAR RECEIVER STEAM GENERATOR (SRSG) SOLAR BOILER MANAGEMENT SYSTEM (SBMS)

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Power Block: Turbine Overview

System produces steam to match high-efficiency turbines

Leverages conventional turbine to deliver power with the reliability and power quality

characteristics required by utilities and grid operators

High temperature and pressure steam (565°C and 160 Bar) take advantage of state-

of-the-art turbine efficiencies

Future efficiency gains driven by technology roadmap

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Power tower: A cost-effective

dry-cooling plant

Greater power production offsets

additional cost per unit electricity

Ability to produce higher temperature

steam results in smaller efficiency loss

By producing and selling more

electricity, dry-cooling is an

economically viable choice

Power Block: Air Cooled Condenser Overview

Key design parameters:

Water Use: dry-cooling, conservation

and closed-loop recycling – Uses air instead of water to condense

steam

– Dry-cooling requires 90% less water

than competing wet-cooled or hybrid

systems

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Industry-Leading Technology Roadmap

Increased size drives power block cost effectiveness

High temperature and increased pressure drive turbine efficiency and lower costs

Additional capacity and storage yield higher efficiency and increased asset utilization

MW

BAR °C

HRS %

TODAY NEAR TERM LONGER TERM

IVANPAH POST-IVANPAH UNDER DEVELOPMENT

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Solar Field

- Wireless communication and control

- Mirror reflectivity, cleaning and anti-fouling

- Heliostat control and accuracy

- Improved measurement devices (flux, tracking)

- Real-time attenuation measurement and cloud coverage

- Weather forecasting, day ahead, hours and immediate

Receiver

- Advanced “selective” coatings

- Alternative heat transfer fluids

- Secondary reflectors

Supercritical steam conditions and turbine efficiencies

High Efficiency Storage Integration

CSP Technology: Areas of Focus

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1. Solar Boost for supplemental

production

2. Solar Add-On for extended

production

3. ISCC-Complete Hybridization

Integrated Solar Combined Cycle (ISCC)

utilizing Alstom’s multiple chamber firing

Highest efficiency

Lowest emissions and fuel

consumption

Greatest operational flexibility

Solar Hybrid Applications Fossil Baseload Power Plants

Solar hybridization allows fossil baseload power plants to reduce fossil fuel

consumption, air pollutants and other regulated emissions.

We offer three unique solar thermal hybrid power plant

configurations for customer specific applications:

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BrightSource Solar Plant With Thermal Energy Storage

Extends electricity production into later parts of the day and after sundown,

when valued most by utilities

Reduces the cost of renewable power: - Increases a plant’s capacity factor / higher asset utilization

- Offers higher efficiencies than competing solar thermal power plants

Provides utilities with greater operational flexibility to shape production to account

for variable production of other intermittent resources

Offers utilities and grid operators additional operational and market value: - Balancing and shaping capabilities

- Ancillary services to support a reliable grid

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Proprietary technology produces high-value steam for power,

petroleum and industrial process markets worldwide

Project development proven at commercial scale

Technology roadmap with visibility into significant cost reductions

Thoughtful sighting and low-impact development design

Conclusion

16 Proprietary & Confidential © 2012 BrightSource Energy, Inc.

All rights reserved.

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