Core Technology: LUZ II Solar Thermal System

BrightSource?s primary technological offering is the LUZ II Solar Thermal System. Unlike traditional photovoltaic (PV) panels that convert light directly into electricity, BrightSource?s thermal system converts solar energy into high-pressure, high-temperature steam.

The Power Tower Design

• Heliostats: The system utilizes thousands of software-controlled mirrors called heliostats. These mirrors track the sun in two dimensions to reflect sunlight onto a receiver located at the top of a centralized tower.
• Solar Receiver Steam Generator (SRSG): The concentrated sunlight heats water flowing through the receiver, creating superheated steam at temperatures exceeding 500?C.
• Turbine Integration: This steam is piped to a conventional steam turbine to produce electricity. Because the system uses thermal energy, it can be integrated with thermal energy storage (TES) to provide power even when the sun is not shining.

Products and Services

1. Utility-Scale CSP Systems

BrightSource provides the technology and engineering services for massive solar thermal plants. * Ivanpah Solar Electric Generating System: Located in the Mojave Desert, this is one of the world's largest CSP plants. BrightSource provided the solar field technology and optimization software for this 392 MW facility. * Ashalim Solar Power Station: Located in the Negev Desert, Israel, this project features a 240-meter-high tower?one of the tallest in the world. BrightSource supplied the 50,000+ heliostats and the centralized control system.

2. Solar Field Optimization Software

A critical component of BrightSource?s service is its proprietary software suite, which manages the complexity of a massive solar field. * SFINCS (Solar Field Integrated Control System): This software manages the real-time positioning of every heliostat in the field, optimizing the focus of sunlight on the receiver while accounting for wind, cloud cover, and thermal stresses. * Yield Optimization: Using advanced algorithms, the software calculates the most efficient "aim points" to ensure the receiver is heated evenly, preventing equipment damage and maximizing energy harvest.

3. Solar Thermal for Industrial Processes (SHIP)

Beyond electricity generation, BrightSource offers high-temperature steam for heavy industrial use. * Enhanced Oil Recovery (EOR): The company?s solar steam can be used to heat oil reservoirs, reducing the viscosity of heavy oil and making it easier to extract without burning natural gas to create steam. * Desalination and Chemical Processing: BrightSource technology provides the thermal energy required for energy-intensive processes like water desalination and chemical manufacturing.

4. Thermal Energy Storage (TES) Solutions

BrightSource designs systems that can store excess thermal energy in molten salt. This allows the plant to act like a giant "battery," providing dispatchable baseload power that can be deployed during peak evening hours or during periods of cloud cover.

Operations and Professional Services

BrightSource operates as a technology provider and an Engineering, Procurement, and Construction (EPC) support entity. Their services include: * Site Evaluation and Modeling: Using satellite data and proprietary modeling to predict the energy yield of a specific geographical location. * Solar Field Engineering: Custom design of heliostat layouts to maximize land-use efficiency. * Asset Management: Providing long-term monitoring and maintenance software to ensure the heliostats and receivers operate at peak performance over their 25-to-30-year lifespan.

Environmental and Global Impact

By utilizing solar thermal energy, BrightSource enables the displacement of traditional coal or gas-fired plants with a system that uses the same turbine technology but zero-carbon fuel. The company?s focus on the "Power Tower" method allows for higher temperatures and better efficiency than older parabolic trough CSP systems, making solar thermal a viable partner for intermittent renewables like wind and PV.