The Global Energy Assessment (GEA) brings together over 300 international researchers to provide an independent, scientifically based, integrated and policy-relevant analysis of current and emerging energy issues and options. It has been peer-reviewed anonymously by an additional 200 international experts. The GEA assesses the major global challenges for sustainable development and their linkages to energy; the technologies and resources available for providing energy services; future energy systems that address the major challenges; and the policies and other measures that are needed to realize transformational change toward sustainable energy futures. The GEA goes beyond existing studies on energy issues by presenting a comprehensive and integrated analysis of energy chalenges, opportunities and strategies, for developing, industrialized and emerging economies. This volume is a invaluable resource for energy specialists and technologists in all sectors (academia, industry and government) as well as policymakers, development economists and practitioners in international organizations and national governments.

Global Energy Assessment: Toward a Sustainable Future

Cooling of photovoltaic cells under concentrated illumination: a critical review

This paper reviews central receiver designs for concentrating solar power applications with high-temperature power cycles Desired features include low-cost and durable materials that can withstand high concentration ratios (~1000 suns), heat-transfer fluids that can withstand temperatures >650 °C, high solar absorptance, and low radiative and convective heat losses leading to a thermal efficiency >90% Different receiver designs are categorized and evaluated in this paper: (1) gas receivers, (2) liquid receivers, and (3) solid particle receivers For each design, the following information is provided: general principle and review of previous modeling and testing activities, expected outlet temperature and thermal efficiency, benefits, perceived challenges, and research needs Emerging receiver designs that can enable higher thermal-to-electric efficiencies (50% or higher) using advanced power cycles such as supercritical CO 2 closed-loop Brayton cycles include direct heating of CO 2 in tubular receiver designs (external or cavity) that can withstand high internal fluid pressures (~20 MPa) and temperatures (~700 °C) Indirect heating of other fluids and materials that can be stored at high temperatures such as advanced molten salts, liquid metals, or solid particles are also being pursued, but challenges include stability, heat loss, and the need for high-temperature heat exchangers

/pdf/review-of-high-temperature-central-receiver-designs-for-2rfmxikqed.pdf

Review of High-Temperature Central Receiver Designs for Concentrating Solar Power

United States. Advanced Research Projects Agency-Energy (Awards DE-AR0000471 and DE-AR0000181)

Concentrating Solar Power.

Supercritical carbon dioxide cycles for power generation: A review

This paper consists of three parts. The first part presents a mostly thermodynamic comparison of the supercritical carbon dioxide (S-CO2) cycle to helium Brayton, superheated steam, and supercritic...

The Supercritical Carbon Dioxide Power Cycle: Comparison to Other Advanced Power Cycles

Supercritical carbon dioxide cycles are a promising power conversion option for future nuclear reactors operating with a reactor outlet temperature in the range of 550 to 650°C. The recompression c...

High-Performance Supercritical Carbon Dioxide Cycle for Next-Generation Nuclear Reactors

Passive safety systems are commonly considered to be more reliable than active systems. The lack of mechanical moving parts or other active components drastically reduces the probabilities of hardw...

/pdf/the-impact-of-uncertainties-on-the-performance-of-passive-3u849yo651.pdf

Pavel Hejzlar

Papers

The Supercritical Carbon Dioxide Power Cycle: Comparison to Other Advanced Power Cycles

High-Performance Supercritical Carbon Dioxide Cycle for Next-Generation Nuclear Reactors

The Impact of Uncertainties on the Performance of Passive Systems

Assessment of gas cooled fast reactor with indirect supercritical co 2 cycle

Terrapower, llc traveling wave reactor development program overview