Beam-down linear Fresnel reflector: BDLFR

Sánchez-González, Alberto; Gómez-Hernández, Jesús

doi:10.1016/j.renene.2019.07.017

Cited by 23 publications

(4 citation statements)

References 26 publications

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“…This concept was first experimentally tested by Flamant et al [27,28] in the early 80's, who corroborated the advantage of using a fluidized bed, in comparison to a packed bed, as the appropriate particle technology to rapidly distribute the concentrated solar energy on the top through the whole bed of particles [29]. In recent years, there has been new research using fluidized beds as a system able to capture concentrated solar energy for thermal energy storage [26,30,31]. Diaz-Heras et al [26] tested the same materials studied in this work in a bubbling fluidized bed and observed that SiC presents the highest thermal efficiency during the charging process, although sand obtained lower pumping costs.…”

Section: Introductionmentioning

confidence: 96%

“…Tregambi et al [30] observed the temperature distribution on the top of a directly-irradiated fluidized bed and studied the temperature reduction on the particles generated by bubble injection in the bed. Finally, Sánchez-González and Gómez-Hernández [31] proposed a linear system with Fresnel reflectors, in which the fluidized particles are transported linearly. This allowed them to avoid the problem of the high temperatures the secondary reflector is required to support.…”

Section: Introductionmentioning

confidence: 99%

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Characterization and testing of solid particles to be used in CSP plants: Aging and fluidization tests

Díaz-Heras¹,

Calderón

Navarro

et al. 2021

Solar Energy Materials and Solar Cells

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Characterization and testing of solid particles to be used in CSP plants: Aging and fluidization tests

Díaz-Heras¹,

Calderón

Navarro

et al. 2021

Solar Energy Materials and Solar Cells

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“…Additionally, there are several technologies for harnessing solar radiation. The solar concentration technique is one of the most promising forms [3], in which the linear Fresnel [4,5] reflector [6,7] is highlighted [8,9] as one of best performing solar systems [10,11] that produces useful heat at medium and high temperatures [12]. It is a low-cost technology with sufficient thermal efficiency.…”

Section: Introductionmentioning

confidence: 99%

Prototype of lineal solar collector Fresnel

et al. 2020

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The development of a prototype linear solar collector Type Fresnel, has a purpose the use of direct solar heat radiation for water heating and/or steam production, as an alternative to supply conventional water heating systems or steam generators, which consume energy from fossil fuels. For the development of the system, used the solar radiation of the UTS, located in Bucaramanga, Colombia, is identify the mathematical models to perform the sizing, then materials based on technical specifications and availability in Colombia, in order to perform the assembly and field tests, measuring the ambient and in the collector temperature to determine the efficiency of the model. It should be noted that, the model presented does not have a control system for flow, temperature, pressure and level, it has no solar tracking of any kind; Its movement was done manually with each reflex. Finally, the model does not have a hydraulic system forced, and has a preheater at the entry of the concentration point.

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“…In comparison, the photothermal technology possesses competitive advantages in direct storage and combination with the existing thermal power system [10], which benefits the flexibility and penetration. As for the photothermal utilization, the parabolic trough collecting technique is the most commercialized concentrating solar power (CSP) technology, other collecting techniques mainly including solar tower with heliostats, linear Fresnel concentrator and parabolic dish concentrator [11][12][13]. Different forms have multiple spans of concentrating ratio which are able to provide various grade energy supply, from large-scale power plant to decentralized energy solution [14,15].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of the transient thermal load and deformation of the evacuated receiver in solar parabolic trough collector

et al. 2020

Sci. China Technol. Sci.

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As a core element in solar parabolic trough collector, the evaluated receiver often runs under severe thermal conditions. Worse still, the transient thermal load is more likely to cause structural deformation and damage. This work develops an efficient transient multi-level multi-dimensional (M2 ) analysis method to address photo-thermal-elastic problems, thereby estimating transient thermal load and deformation for the receiver:model is adopted to determine the transient thermo-hydraulic state, (ii) 3-D finite volume method (FVM) model for the receiver tube is established to obtain the real-time temperature distribution, (iii) 3-D finite element method (FEM) model is employed to make thermoelastic analysis. Based on this M 2 method, the typical transient cases are conducted in cold-start, disturbed-operation and regulatedprocess. Three indicators (average temperature of the wall (ATW), radial temperature difference (RTD), circumferential temperature difference (CTD)) are defined for overall analysis of the receiver thermal load. It is found that in the transient process, receivers face response delay and endure significant thermal load fluctuation. The response time for a single HCE (heat collecting element) under lower mass flow rate (1.5 kg s −1 ) could sustain 280 s. During the cold-start stage (DNI=200 W m −2 to 800 W m −2), the maximum value of CTD in receiver is as high as 11.67°C, corresponding to a maximum deflection of 1.05 cm. When the mass flow rate decreases sharply by 80%, the CTD reaches 33.04°C, causing a 2.06-cm deflection. It should be pointed out that in the cold-start stage and the lower mass flow rate operation for solar parabolic trough collector, alleviating the transient thermal load and deformation is of importance for safely and efficiently running evaluated receiver. solar energy, transient thermal load and deformation, heat collecting element, parabolic trough collector, multi-level multi-dimensional analysis method

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Beam-down linear Fresnel reflector: BDLFR

Cited by 23 publications

References 26 publications

Characterization and testing of solid particles to be used in CSP plants: Aging and fluidization tests

Characterization and testing of solid particles to be used in CSP plants: Aging and fluidization tests

Prototype of lineal solar collector Fresnel

Characteristics of the transient thermal load and deformation of the evacuated receiver in solar parabolic trough collector

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