Line focus solar thermal central receiver research study. Final report, April 30, 1977-March 30, 1979

Canio, D.G. Di; Treytl, William J.; Jur, F. A.; Watson, C.D.

doi:10.2172/5535434

Cited by 11 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After some pioneering experiences by Francia and Di Canio et al, the first serious development undertaken on the compact LFR system was proposed at the University of Sydney in 1993. The concept is composed by a single field of reflectors together with multiple linear receivers (see Figure ).…”

Section: Linear Fresnel Reflectorsmentioning

confidence: 99%

Solar thermal CSP technology

Romero

González-Aguilar

2013

WIREs Energy & Environment

116

View full text Add to dashboard Cite

Solar thermal concentrating solar power (CSP) plants, because of their capacityfor large-scale generation of electricity and the possible integration of thermal storage devices and hybridization with backup fossil fuels, are meant to supply a significant part of the demand in countries of the solar belt. Nowadays, the market penetration of solar thermal electricity is steeply increasing, with commercial projects in Spain, USA, and other countries, being the most promising technology to follow the pathway of wind and photovoltaics to reach the goals for renewable energy implementation in 2020 and 2050. In the first commercial projects involving parabolic-trough technology, some improvements are being introduced like the use of large molten-salt heat storage systems able to provide high degrees of dispatchability to the operation of the plant, like the plants Andasol in Guadix, Spain, with 7.5 h of nominal storage, or the use of direct steam generation loops to replace thermal oil at the solar field. In the near future, the research and innovation being conducted within the field of linear Fresnel collectors may lead to high temperature systems able to operate up to 500 • C and produce cost-effective superheated steam. Central receiver systems are opening the field to new thermal fluids like molten salts (Gemasolar tower plant in Seville, Spain) with more than 14 h of nominal storage and air, and new solar receivers like volumetric absorbers, allowing operation at temperatures above 1000 • C. All these factors can lead to electricity generation cost reduction of CSP plants by 30-40% for the period 2010-2020, according to public roadmaps and cost analysis made by the International Energy Agency in PTCs are linear-focus concentrating solar devices suitable for working in the 150-400 • C temperature range. 20 The current research with new thermal fluids intends to increase the operating temperature up Advanced Review 4 5 CONCLUSION AND OUTLOOKFrom the seventies to the nineties, the development of STE technologies remained restricted to a few FIGURE 9 Aerial view of Gemasolar plant, property of Torresol Energy C Torresol Energy, located in South Spain. At present, it is the largest commercial solar central receiver system with a circular-shape heliostat field. Reproduced by permission of Torresol Energy.

show abstract

Section: Linear Fresnel Reflectorsmentioning

confidence: 99%

Solar thermal CSP technology

Romero

González-Aguilar

2013

WIREs Energy & Environment

116

View full text Add to dashboard Cite

show abstract

“…In Linear Fresnel concentrators (LFC in the following), a linear fixed receiver is suspended above a solar field composed of strips of mirrors (Di Canio et al, 1979;Feuermann, 1991;Francia, 1968;Montes et al, 2014;. The mirrors are usually slightly concentrating, and each strip rotates on a fixed horizontal axis in order to reflect the sun radiation towards the receiver.…”

Section: Introductionmentioning

confidence: 99%

Optimal focal length of primary mirrors in Fresnel linear collectors

Boito

Grena

2017

Solar Energy

View full text Add to dashboard Cite

In a linear Fresnel plant adopting slightly curved primary mirrors (cylindrical or parabolic), a significant gain in the collected radiation can be achieved using primary mirrors with different focal lengths, dependent on the position of the mirror with respect to the receiver. This work introduces a universal function that provides the optimal focal length of a mirror, given only the mirror’s position relative to the receiver and the latitude, for a NS-oriented collector with a flat horizontal effective target. In a solar plant with the focal lengths defined by this function, the efficiency gain with respect to a solar field adopting identical mirrors is estimated in the range 1.5–6%, with the gain increasing if mirror imperfections or tracking errors are present: this means that the regulation of the focal lengths is especially useful in containing the loss of efficiency due to defects. The given rule is tolerant to errors in the focal length regulation (up to 10%). The function can be used as a reference for future projects, or as a starting point for more refined optimizations

show abstract

“…Linear Fresnel systems (Di Canio et al, 1979;Feuermann and Gordon, 1991;Montes et al, 2014; are among the most promising technologies for energy production from concentrated sun radiation. In such plants, a linear fixed receiver is suspended above a solar field composed by strips of mirrors, flat or slightly concentrating; each strip rotates on a fixed horizontal axis in order to reflect the sun radiation towards the receiver.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the geometry of Fresnel linear collectors

Boito

Grena

2016

Solar Energy

View full text Add to dashboard Cite

Methods and results concerning the optical optimization of a linear Fresnel collector are presented. The variables considered in the optimization are the positions, widths and focal lengths of the mirrors; the mirrors can be of variable size and focal length, and they can be nonuniformly spaced. The target function to be optimized is the plant cost divided by the collected solar radiation in a year. The computation of the collected radiation and of its average on the year, and the optimization of the cost/radiation function are carried out via suitable mathematical methods and the choice of a plausible cost function. Four different levels of optimization (uniformly spaced identical mirrors; nonuniformly spaced identical mirrors; mirrors of the same width with uniform spacing and variable focal lengths; and finally a full optimization) are presented, with a discussion of the resulting gain on the target function (i.e. the reduction of the ratio between the plant cost and the collected radiation). The results show that the application of suitable optimization strategies can lead to an estimated gain around 12% with respect to the initial configuration (all mirrors identical and adjacent), and that a full optimization leads to a gain of 4.5% over a simple uniform optimization. This gain is due in large part to the possibility of regulating the focal lengths (the optimization of focals leads to a 2.8% gain over the uniform case), while only a minor improvement (less than 0.4%) is obtained with nonuniformly spaced identical mirrors

show abstract

Line focus solar thermal central receiver research study. Final report, April 30, 1977-March 30, 1979

Cited by 11 publications

References 0 publications

Solar thermal CSP technology

Solar thermal CSP technology

Optimal focal length of primary mirrors in Fresnel linear collectors

Optimization of the geometry of Fresnel linear collectors

Contact Info

Product

Resources

About