Solar Energy

Photovoltaics

On average, about one and a half hours of the sunlight that falls on Earth could supply humanity with enough energy to meet all the world’s needs for an entire year. Harnessing even a fraction of this energy could supply humanity with abundant energy to live, move about, and thrive industrially and economically well into the foreseeable future. Sandia is working hard to help make this dream a reality.

Typically, solar energy is harnessed in one of two ways: photovoltaics (PV) use specially selected and fabricated materials that use the sun’s energy to liberate bound electrons in the material which are then captured and channeled to produce electric current—on the other hand, concentrating solar power (CSP) uses mirrors or lenses to focus a broad field of solar energy onto a smaller receiver. The concentrated thermal energy is then used to drive some form of heat engine that produces either electricity or mechanical work.

Concentrating Solar Power (CSP)

In virtually all applications CSP is large power, on the order of 100 MW or larger, that is used by utilities to generate electricity and distribute to consumers. In a CSP plant, solar energy is converted to heat and the heat is used in a conventional power cycle or other heat engine to produce mechanical power and drive a generator.

Sunshine to Petrol (S2P)

Sandia’s Sunshine to Petrol (S2P) team seeks to address the critical national and global issues of growing energy consumption amid increased vulnerability and price volatility of petroleum supplies and climate change risks. The transportation and industrial sectors in the United States are deeply dependent on petroleum, a dominant energy source for these sectors and a driver of greenhouse gas emissions. An alternative energy carrier coupled to a sustainable energy source that can be used within existing infrastructure, distribution, and traditional petroleum-based combustion systems is necessary to assure national security, enhance U.S. economic competitiveness, demonstrate leadership in mitigating the risks of climate change, and promote a smooth transition to an energy-secure and diversified transportation mix.

Solar Publications

• PV Value Fact Sheet
• Electrical and Thermal Finite Element Modeling of Arc Faults in Photovoltaic Bypass Diodes
• Ultrathin Flexible Crytalline Silicon: Microsystems Enabled Photovoltaics
• Design Considerations for Concentrating Solar Power Tower Systems Employing Molten Salt
• Energy, Climate, & Infrastructure Security FY11–14 STRATEGIC PLAN