Status report on a high temperature solar energy system

Skinrood, A. C.; Brumleve, T. D.; Schäfer, C.T.; Yokomizo, C.T.; Leonard, Ch.

doi:10.2172/7357707

Cited by 12 publications

(3 citation statements)

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“…63 south-facing flat mirror heliostats track the sun's movement and focus it down on the north facing parabola (Trombe and Le Phat Vinh, 1973). NREL also has a high-flux solar furnace system where heliostats aim light towards a ground-based secondary reflector system that redirects and concentrates the sunlight to a small aperture receiver, although up to 10% of the energy is lost with each reflection (Skinrood et al, 1974). These systems achieve high concentrations and receiver temperatures with large, precision secondary optical elements -whose cost has prevented the commercial adoption of beam-down CSP.…”

Section: Introductionmentioning

confidence: 99%

Concentrated solar power on demand

Slocum¹,

Codd²,

Buongiorno³

et al. 2011

Solar Energy

106

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A concentrating solar power system is presented which uses hillside mounted heliostats to direct sunlight into a volumetric absorption molten salt receiver with integral storage. The concentrated sunlight penetrates and is absorbed by molten salt in the receiver through a depth of 4-5 meters, making the system insensitive to the passage of clouds. The receiver volume also acts as the thermal storage volume eliminating the need for secondary hot and cold salt storage tanks. A small aperture and refractory-lined domed roof reduce losses to the environment and reflect thermal radiation back into the pond. Hot salt is pumped from the top of the tank through a steam generator and then returned to the bottom of the tank. An insulated barrier plate is positioned within the tank to provide a physical and thermal barrier between the thermally stratified layers, maintaining hot and cold salt volumes required for continuous operation. As a result, high temperature thermal energy can be provided 24/7 or at any desired time. The amount of storage required depends on local needs and economic conditions. About 2500 m 3 of nitrate salt is needed to operate a 4 MW e steam turbine 24/7 (7 hours sunshine, 17 hours storage), and with modest heliostat field oversizing to accumulate energy, the system could operate for an additional 24 hours (1 cloudy day). Alternatively, this same storage volume can supply a 50 MW e turbine for 3.25 hours without additional solar input. Cosine effect losses associated with hillside heliostats beaming light downwards to the receiver are offset by the elimination of a tower and separate hot and cold storage tanks and their associated pumping systems. Reduced system complexity also reduces variable costs. Using the NREL Solar Advisor program, the system is estimated to realize cost-competitive levelized production costs of electricity.

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Section: Introductionmentioning

confidence: 99%

Concentrated solar power on demand

Slocum¹,

Codd²,

Buongiorno³

et al. 2011

Solar Energy

106

View full text Add to dashboard Cite

show abstract

“…Así, la primera referencia se realiza desde el Energy Institut of Moscow, experiencias dirigidas y capitaneadas por dos rusos de ascendencia española, F. Melero y R. Aparici, en la cual planteaban la posibilidad de construir grandes centrales solares con espejos guiados de forma independiente y concentrando la radiación en un receptor situado en una torre. La segunda, desde los grandes centros de investigación energética de Sandia Laboratories, dirigidos por Gutiérrez y Skinrood, referenciados en el excelente trabajo realizado por ese equipo, Skinrood et al [128], en el cual se hace un repaso y puesta al día de conocimientos, alternativas y costes de esta nueva alternativa tecnológica.…”

Section: Termodinámicaunclassified

“…En 1973 surge la primera crisis del petróleo haciendo saltar los precios y los esquemas de aprovechamiento energético, lanzándose todos los países occidentales a una carrera de búsqueda de energías alternativas o complementarias, pero sobre todo diversificadoras del mercado energético basado en el FO. Así, el campo solar inicia otra fase de desarrollo y en concreto la referencia más importante es el trabajo de Skinrood et al [128], y CNRS [190] sobre el estado del arte en los sistemas de alta temperatura. A partir del primer estudio surge el plan USA de centrales termosolares, entre ellas deben citarse CRTF, JPL, SLL y Solar One.…”

Section: I3-los Grandes Proyectos De Centrales Solaresunclassified