The secondary mirror is a critical component in the optical system of certain Solar Power Tower plants (SPT), as it redirects the concentrated sunlight from the primary mirror onto the receiver, which can be arranged at ground level. In this study, we propose a design optimisation for the secondary mirror of a CSP plant. The design ...
A novel method is developed for designing the additional secondary reflector (SR) of PTCs. Flux compensation strategy is proposed by balancing the solar flux on upper and lower surfaces of absorber. Performances of PTCs with designed SR are compared with other studies and shows superior performance.
To solve the problem, a novel method is proposed for designing the additional secondary reflector (SR) in a PTC to improve distribution on absorber tube surface. In the design, the heat flux between upper and lower surfaces of absorber tube is well balanced by optimizing the location of absorber.
The allocation is enabled by the adoption of both a spectral filter and linear Fresnel reflectors, and the thermochemical module based on methanol decomposition provides a strong basis for net solar-to-electric (NSE) efficiency at the system level.
The thermochemical efficiency is maintained at a high level (60–65%), indicating that nearly two-thirds of the thermal energy captured by the system can be stored via syngas, which can be fed into the SOFC to supply electricity when sunlight is absent.
Once location of edge point P and the circumferential angle range ( βi to βi+1) are decided, the inclined angles ( αi) of each segment of secondary mirror (M i) can be designed sequentially starting from i = 1 (i.e., from the first angular interval).
However, the actual solar ray is a cone-shaped ray with a half-angle ( σsun), and also there are other mechanical errors in the PTC manufacturing process, such as mirror error (σm) and tracking error ( σt) as shown in Fig. 1 b.
The secondary mirror is a critical component in the optical system of certain Solar Power Tower plants (SPT), as it redirects the concentrated sunlight from the primary mirror onto the receiver, which can be arranged at ground level. In this study, we propose a design optimisation for the secondary mirror of a CSP plant. The design ...
In order to achieve full-spectrum solar energy utilization, a spectral beam splitting photovoltaic/photothermal system based on secondary reflection is proposed and …
In most cases, this conversion is manifested in an increase in the temperature of the water. Some applications of flat plate collectors are simple water heating, space heating using water-to-air heat exchangers, low-temperature solar power generation cycles, space cooling or refrigeration, and cooking. There are primarily three kinds of losses ...
The present paper aims to develop a new shape of secondary reflector for Fresnel linear concentrator; it represents the continuation of a series of optimization carried …
This study aims to utilize the reflector-sheet temperature of the secondary reflector for the Linear Fresnel Solar system, which reaches high temperatures due to the …
The invention discloses a secondary reflection closed paraboloid lighting solar hot water power generation device. The device receives solar energy through reflecting and focusing effects of a large plane reflector and a rotary paraboloid reflector, can greatly improve the receiving efficiency of the solar energy, and can be used for realizing collection and receiving of the solar energy …
It was initially believed that integration of the solar cell into the beam splitting device would improve efficiencies by reducing optical losses associated with the added interference filter, but it turns out that reflection/transmission of out of band light is performed worse by a solar cell than by an interference filter. Furthermore, band-pass configurations …
The secondary mirror is a critical component in the optical system of certain Solar Power Tower plants (SPT), as it redirects the concentrated sunlight from the primary mirror onto the receiver, which can be …
The present paper aims to develop a new shape of secondary reflector for Fresnel linear concentrator; it represents the continuation of a series of optimization carried out on a solar prototype with Fresnel type concentration, the new developed form represents a Double Parabolic Concentrator (DPC).
The results show that the system features high solar power generation efficiency (up to 39%) and good potential for solar thermal energy storage (up to 60%) as a result of both …
By installing a secondary reflector above the absorber tube of Fresnel collectors, lost rays are mostly redirected toward the absorber tube and a higher optical efficiency is …
This study aims to utilize the reflector-sheet temperature of the secondary reflector for the Linear Fresnel Solar system, which reaches high temperatures due to the reflection and absorption of concentrated solar radiation.
By installing a secondary reflector above the absorber tube of Fresnel collectors, lost rays are mostly redirected toward the absorber tube and a higher optical efficiency is achieved. The...
Concentrated solar power (CSP) systems generate solar power by using mirrors or lenses (primary concentrators or reflectors) to concentrate a large area of sunlight, or solar thermal energy, onto a smaller area (the receiver). A secondary concentrator reflects the sunlight coming from the primary concentrators onto the absorbing receiver. They ...
Renewable energy plays a significant role in achieving energy savings and emission reduction. As a sustainable and environmental friendly renewable energy power technology, concentrated solar power (CSP) integrates power generation and energy storage to ensure the smooth operation of the power syste …
,420 kW/m 2,87.4%,。 …
To solve the problem, a novel method is proposed for designing the additional secondary reflector (SR) in a PTC to improve uniform heat flux distribution on absorber tube surface. In the design, the heat flux between upper and lower surfaces of absorber tube is well balanced by optimizing the location of absorber.
The reflection coefficient of the secondary reflector. ... Solar energy—a look into power generation, challenges, and a solar‐powered future. Int J Energy Res, 43 (3) (2019), pp. 1049-1067. Crossref View in Scopus Google Scholar [3] Günther M, et al. Advanced CSP teaching materials chapter 6 linear fresnel technology. enerMENA, Kassel, Germany, …
The utility model relates to a secondary reflection hemispherical lighting solar power generation device. The device receives solar energy through light reflecting and focusing functions of...
Concentrated solar power (CSP) systems generate solar power by using mirrors or lenses (primary concentrators or reflectors) to concentrate a large area of sunlight, or solar thermal …
Beam-down solar concentrators use a double reflection to direct solar power towards a receiver on the ground (Segal and Epstein, 2001). As conventionally designed, these plants have upper and ...
To solve the problem, a novel method is proposed for designing the additional secondary reflector (SR) in a PTC to improve uniform heat flux distribution on absorber tube surface. In the design, the heat flux between upper and lower surfaces of absorber tube is well …
In order to achieve full-spectrum solar energy utilization, a spectral beam splitting photovoltaic/photothermal system based on secondary reflection is proposed and simulated through Monte Carlo ray tracing method (MCRT). The designed system concentrates solar radiation to a solar cell covered with a spectral beam splitter film ...
The invention relates to a molten salt thermal system, in particular to a molten salt thermal system for a secondary reflection tower-type solar photothermal power station. According to the molten salt thermal system for the solar photothermal power station in the prior art, a high-tower heat collection manner and a tower-top heat absorber are adopted, the …
The results show that the system features high solar power generation efficiency (up to 39%) and good potential for solar thermal energy storage (up to 60%) as a result of both spectral filtering and the manipulation of individual linear Fresnel reflectors, which also considerably enhance control flexibility. Sensitivity analysis ...
mances both for thermal stability and solar selective reflection. The solar reflectivity can reach 94.6%. 1. Introduction Concentrating solar power (CSP) technology, which converts the unlimited solar radiation into heat for electric power generation through different thermal power cycles, is considered to be one of the most
,420 kW/m 2,87.4%,。 Abstract: A small-scale beam-down solar concentrator with multi-disc is designed. At the same time, the tracking method of the system is proposed in this study.
Renewable energy plays a significant role in achieving energy savings and emission reduction. As a sustainable and environmental friendly renewable energy power technology, concentrated solar power (CSP) integrates power generation and energy storage to ensure the smooth operation of the power system. However, the cost of CSP is an obstacle hampering the commercialization …
Concentrated Solar Power (CSP) plants use mirrors to reflect and concentrate sunlight onto a receiver, to heat a fluid and store thermal energy, at high temperature and energy density, to produce dispatchable heat and/or electricity. The secondary mirror is a critical component in the optical system of certain Solar Power Tower plants (SPT), as it redirects the …
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