— These two-stage concentrators may be simplified by collapsing all heliostats on the horizontal plane. This leads to a simpler optic, although with increased losses. When compared to optics with no secondary, these new systems have a much higher acceptance (tolerance) angle, potentially allowing the use of cheaper components and easier ...
WhatsApp: +86 18221755073
— An orbital transfer payload strongly depends on solar concentrator mass which is determined by its efficiency. This paper is devoted to analysis and comparison …
WhatsApp: +86 18221755073
— This model requires two filters to be changed around every two years, making it exceptionally low maintenance. It's very hassle-free compared to some other home oxygen concentrators. While the EverFlo Q is a powerful concentrator, it's important to note that it has a maximum oxygen output of 5 LPM.
WhatsApp: +86 18221755073
Among these, two-stage designs henceforth referred to as 'two-stage solar concentrators (TSSCs)' (Fig. 1) are prominent for design modularity, efficient power delivery, high energy flux concentration ratio (CR) (≈ 1000), and utilizing lesser cells than one-stage designs, and appear to be feasible for building integration [[4], [5], [6 ...
WhatsApp: +86 18221755073
— We therefore present a detailed analysis of two-stage line-focus asymmetric concentrators for flat receiver geometries and compare them to their symmetric …
WhatsApp: +86 18221755073
Chromite ore (-650 micron particle size) of 15% Cr2O3 is fed at the flowrate of 1200 tons/h to a beneficiation circuit consists of spiral concentrators at two stage such as rougher and cleaner. Rougher concentrate of the spiral is treated in cleaner spirals while its tailing is sent to the final tailing.
WhatsApp: +86 18221755073
Semantic Scholar extracted view of "Etendue-matched two-stage concentrators with multiple receivers" by J. Chaves et al.
WhatsApp: +86 18221755073
— Here we propose a novel 2-stage dish concentrator system for concentrating solar power plants based on the so-called overlap method, which improves both the …
WhatsApp: +86 18221755073
A method is proposed to follow an integrative design of building and façade-integrated two-stage concentrators (TSSCs) through a parametric modeling approach. The vertical facades (with high solar elevation angles) are unfavorably oriented toward receiving sufficient DNI [44] and may cause the performance degradation of integrated systems.
WhatsApp: +86 18221755073
— This paper proposes a performance assessment method for roof-integrated two-stage solar concentrators (TSSCs) as thermo-photovoltaic systems using a parametric modeling approach. The productivity ...
WhatsApp: +86 18221755073
Downloadable (with restrictions)! The optimal performance of two-stage solar concentrators (TSSCs) as building-integrated energy solutions is achievable through an integrative design of TSSCs and the building geometry. Such a design process reflects a multi-criteria decision-making problem involving different stakeholders having domain-specific concerns.
WhatsApp: +86 18221755073
— We present a new two-stage optical design for parabolic dish concentrators that can realistically attain close to 90% of the thermodynamic limit to concentration with practical, compact designs (e ...
WhatsApp: +86 18221755073
— Geometrical gain of a luminescent solar concentrator is drastically increased by laying out a luminescent fiber in a luminescent plate with air gap around it and attaching a photovoltaic (PV) cell to the tip of the fiber. The plate converts an incident photon to a first photoluminescence (PL) photon, and the fiber converts it to a second PL photon. Thus, …
WhatsApp: +86 18221755073
— Request PDF | Leaf-inspired luminescent solar concentrator based on two-stage photoconversion | Geometrical gain of a luminescent solar concentrator is drastically increased by laying out a ...
WhatsApp: +86 18221755073
— Li et al. (2016) investigated and summarized the optical characteristics of two-stage solar concentrators with various reflector configurations for redirecting convergent radiative beams. Research shows that a high concentration ratio is one of the advantages of two-stage dish solar concentrators. However, the focus is moving, and thus ...
WhatsApp: +86 18221755073
— A novel two-stage experimental photobioreactor (PBR) with a total volume of 450 L and based uniquely on solar concentrators—linear Fresnel lenses—has been constructed and tested. Daily courses of irradiance, and also its distribution inside cultivation tubes, were studied in two unit types. The supra-high irradiance units in the …
WhatsApp: +86 18221755073
— The new approach yielded the so called Snail and Helmet concentrators (mirror-based, i.e. XX, where these letters stand for the fact that two reflective surfaces are used for primary and secondary) which managed to achieve: (i) a concentration very close to the maximum limit; (ii) a gap between the secondary and the receiver, practically with …
WhatsApp: +86 18221755073
— Two-stage photovoltaic concentrators with Fresnel lenses as primaries and dielectric totally internally reflecting nonimaging concentrators as secondaries are discussed. The general design principles of such two-stage systems are given. Their optical properties are studied and analyzed in detail using computer ray trace procedures.
WhatsApp: +86 18221755073
Abstract A novel two-stage experimental photobioreactor (PBR) with a total volume of 450 L and based uniquely on solar concentrators—linear Fresnel lenses—has been con-structed and tested. Daily courses of irradiance, and also its distribution inside cultivation tubes, were studied in two unit types. The supra-high irradiance units in the ...
WhatsApp: +86 18221755073
— We present a new two-stage optical design for parabolic dish concentrators that can realistically attain close to 90% of the thermodynamic limit to concentration with …
WhatsApp: +86 18221755073
— This paper proposes a core method for integrating two-stage solar concentrators (TSSCs) as roof-integrated energy supply systems at the district scale. However, the performance of these systems not only depends on good configurations but also on optimal building typologies. The design process of buildings-integrated TSSCs …
WhatsApp: +86 18221755073
— There are two types of concentrators: a bigger model you can use at home, and a lighter, portable model you can use on the go. A typical single-battery oxygen concentrator can last from 2 to 6 hours.
WhatsApp: +86 18221755073
Performance Model for Two-Stage Optical Concentrators for Solar Thermal Applications. / NREL. 1987. 89-95 Paper presented at Solar '87 1987 Annual Meeting, American Solar Energy Society, Inc., Solar Energy Society of Canada, Inc., Portland, Oregon. Research output: Contribution to conference › Paper.
WhatsApp: +86 18221755073
It has been shown theoretically that the two-stage concentrator, formed by placing a DTIRC near the focal point of a Fresnel lens, can also nearly approach the maximum thermodynamic limit.4 In this paper we will give the general design principles for the two-stage concentrators. Two specific designs with concentration ratios of 200X and 1220X ...
WhatsApp: +86 18221755073
An ideal second-stage reflective element that redirects the primary radiation onto a section of that surface may be designed and a useful application is to asymmetric two-stage concentrators for solar energy. Expand
WhatsApp: +86 18221755073
It means that the combined two-stage concentrator may well replace the almost ideal CPC concentrators, which are much less compact and require more optical surface per unit area of entrance aperture. For high reflectances P2 the CEC two stage shows even higher efficiency than the trumpet two stage, especially for lower-grade primaries (large a).
WhatsApp: +86 18221755073
— A new two-stage optical design is proposed for parabolic trough solar collectors with tubular absorbers. It can boost the concentration ratio by a factor of 2.5 relative to the conventional design, while maintaining the large rim angles (i.e., low nominal ƒ-numbers) that are desirable for practical and economical reasons.
WhatsApp: +86 18221755073
— Semantic Scholar extracted view of "New second-stage concentrators (XX SMS) for parabolic primaries; Comparison with conventional parabolic trough concentrators" by Diogo Canavarro et al. ... Optical Analysis of a Two Stage XX Simultaneous Multiple Surface Concentrator for Parametric Trough Primary and Flat Absorber With Application …
WhatsApp: +86 18221755073
— Among several advanced technologies, two-stage solar concentrators (TSSCs) (employing two mirrors to focus sunlight on a receiver) have significant …
WhatsApp: +86 18221755073
Given a linear (2-D) primary optical concentrator and a convex close surface of any shape and location (within known limits) underneath, an ideal second-stage reflective element that redirects the primary radiation onto a section of that surface may be designed. A useful application is to asymmetric two-stage concentrators for solar energy, the primary of …
WhatsApp: +86 18221755073
Request PDF | On Oct 4, 2023, Hiroto Nishimura and others published Design considerations for leaf-inspired luminescent solar concentrators based on two-stage photoconversion | Find, read and cite ...
WhatsApp: +86 18221755073
DOI: 10.1016/j.applthermaleng.2023.119998 Corpus ID: 255736891; 4E analysis of two novel H2S concentrators in dual-stage Selexol process of integrated gasification combined cycle @article{Mei20234EAO, title={4E analysis of two novel H2S concentrators in dual-stage Selexol process of integrated gasification combined cycle}, author={Weiguang Mei …
WhatsApp: +86 18221755073
— An orbital transfer payload strongly depends on solar concentrator mass which is determined by its efficiency. This paper is devoted to analysis and comparison of concentrator-receiver system efficiency for one- and two-stage solar concentrators. A new computer code TANDEM for calculating the concentrator-receiver system efficiency was …
WhatsApp: +86 18221755073
Table of Contents: Introduction / CPCs / Practical Design of CPC Thermal Collectors / Practical Design of CPC PV Concentrators / Two-Stage Nonimaging Concentrators for Solar Thermal Applications / Two-Stage Nonimaging Concentrators for Solar PV Applications / Selected Demonstrations of Nonimaging Concentrator Performance / The …
WhatsApp: +86 18221755073