concentrators two stage

Ideal second stages in tandem with parabolic concentrators

Starting with of two-stage concentrators, in which ideal second-stage the paraboloid property of stigmatically focusing an elements 6 - 8 are employed to enhance concentration on-axis collimated beam at point 0, the intersection of capability, is derived. any off-axis reflected ray with the focal plane can be found by simple geometrical ...Ideal second stages in tandem with parabolic concentrators.1982-4-1 · 1. Appl Opt. 1982 Apr 1;21(7):1307-9. doi: 10.1364/AO.21.001307. Ideal second stages in tandem with parabolic concentrators. Kritchman EM. Expressions for the concentration capability of parabolic reflectors are derived and extended to include additional ideal second-stage concentration.

(PDF) Second-stage concentrators—a new formalism | eli ...

As limit had been postulated and various ideal two-dimensional (2D) optical designs have already been suggested. 2- 6 Ideal the entendue, in turn, uniquely determines the ideal exit aperture of a concentrator,1 0 the expression for aid is the same second-stage concentrators form a special case of ideal con- as for a real source [Eq.Two-stage solar concentrators based on parabolic troughs ...2015-11-20 · Two-stage solar concentrators based on parabolic troughs: asymmetric versus symmetric designs. Schmitz M, Cooper T, Ambrosetti G, Steinfeld A. While nonimaging concentrators can approach the thermodynamic limit of concentration, they generally suffer from poor compactness when designed for small acceptance angles, e.g., to capture direct solar ...

Design of nonimaging concentrators as second stages in ...

Design of nonimaging concentrators as second stages in tandem with image-forming first-stage concentrators The paper discusses the paraboloidal mirror as a tracking solar concentrator, fitting a nonimaging second stage to the paraboloidal mirror, other image-forming systems as first stages, and tracking systems in two-dimensional geometry. Because of inherent aberrations, …(PDF) Solar Concentrators - ResearchGateThese concentrators have two major benefits; they are ver y compact and off er very high c oncentration. However, ... 3 This is a two-stage concentration process.

Progress in the development of two stage concentrated …

In this research work, the performance of a novel secondary concentrator in the vacuum receiver of the parabolic trough collector was investigated. The secondary concentrator was designed, the optical and thermal performance analysis is conducted analytically and validated numerically by using Finite Element Analysis based computational software. From the initial optical and …Ideal second stages in tandem with parabolic concentratorsStarting with of two-stage concentrators, in which ideal second-stage the paraboloid property of stigmatically focusing an elements 6 - 8 are employed to enhance concentration on-axis collimated beam at point 0, the intersection of capability, is derived. any off-axis reflected ray with the focal plane can be found by simple geometrical ...

(PDF) Asymmetric second-stage concentrators | eli ...

Asymmetric second-stage concentrators E. M. Kritchman Given a linear (2-D) primary optical concentrator and a convex close surface of any shape and location (with- in known limits) underneath, an ideal second-stage reflective element that redirects the primary radiation onto a section of that surface may be designedl A useful application is to asymmetric two-stage …Optics of two-stage photovoltaic concentrators with ...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. It is found that the two-stage concentrator offers …

Asymmetric second-stage concentrators.

1982-3-1 · 1. Appl Opt. 1982 Mar 1;21(5):870-3. doi: 10.1364/AO.21.000870. Asymmetric second-stage concentrators. Kritchman EM(1). Author information: (1)University of Chicago, Enrico Fermi Institute, Chicago, Illinois 60637, USA. Given a linear (2-D) primary optical concentrator and a convex close surface of any shape and location (within known limits) underneath, an ideal …Design of nonimaging concentrators as second stages in ...Two-stage solar concentrators based on parabolic troughs: asymmetric versus symmetric designs Max Schmitz, Thomas Cooper, Gianluca Ambrosetti, and …

Two-stage concentrators for solar bimodal power and ...

1997-12-31 · 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 developed.Two-stage solar concentrators based on parabolic troughs ...2015-11-20 · Two-stage solar concentrators based on parabolic troughs: asymmetric versus symmetric designs. Schmitz M, Cooper T, Ambrosetti G, Steinfeld A. While nonimaging concentrators can approach the thermodynamic limit of concentration, they generally suffer from poor compactness when designed for small acceptance angles, e.g., to capture direct solar ...

Development of a two-stage solar concentrator using ...

1980-1-1 · Two-stage tilting solar concentrators 509 The new concentrators are simple, robust and easy to maintain. Components may be made locally in most countries (wooden support structures, etc.). Mir- ror area and material usage are exceptionally low. No "box" or cover plate is required in warmer climates, so that condensation is avoided.Performance model for two-stage optical concentrators for ...1988-1-1 · 2. PERFORMANCE MODEL FOR TWO-STAGE THERMAL CONCENTRATORS We have developed a performance model for op- timizing point focus solar thermal concentrators both with and without secondaries. We use a methodology patterned after an approach originally introduced by Jaffe[ 12,13], however, we have incorporated two very important new features. 1.

Two-stage concentrators for solar bimodal power and ...

1997-12-31 · 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 developed.Optics of two-stage photovoltaic concentrators with ...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. It is found that the two-stage concentrator offers …

Progress in the development of two stage concentrated …

In this research work, the performance of a novel secondary concentrator in the vacuum receiver of the parabolic trough collector was investigated. The secondary concentrator was designed, the optical and thermal performance analysis is conducted analytically and validated numerically by using Finite Element Analysis based computational software. From the initial optical and …A two-stage solar photobioreactor for cultivation of ...2008-4-26 · 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 ''roof'' achieved a maximum summer …

(PDF) Second-stage concentrators—a new formalism | eli ...

As limit had been postulated and various ideal two-dimensional (2D) optical designs have already been suggested. 2- 6 Ideal the entendue, in turn, uniquely determines the ideal exit aperture of a concentrator,1 0 the expression for aid is the same second-stage concentrators form a special case of ideal con- as for a real source [Eq.Ideal second stages in tandem with parabolic …Expressions for the concentration capability of parabolic reflectors are derived and extended to include additional ideal second-stage concentration. The ultimate concentration of a parabolic reflector (primary) alone is shown to achieve one-half of the ideal limit in 2-D geometry; the respective two-stage configuration is shown to approach the ...

Ideal second stages in tandem with parabolic …

Expressions for the concentration capability of parabolic reflectors are derived and extended to include additional ideal second-stage concentration. The ultimate concentration of a parabolic reflector (primary) alone is shown to achieve one-half of the ideal limit in 2-D geometry; the respective two-stage configuration is shown to approach the ...Optics of two-stage photovoltaic concentrators with ...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. It is found that the two-stage concentrator offers …

Design of nonimaging concentrators as second stages in ...

Two-stage solar concentrators based on parabolic troughs: asymmetric versus symmetric designs Max Schmitz, Thomas Cooper, Gianluca Ambrosetti, and …Optics of two-stage photovoltaic concentrators with ...1987-4-1 · 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.

Two-stage solar concentrators based on parabolic troughs ...

While nonimaging concentrators can approach the thermodynamic limit of concentration, they generally suffer from poor compactness when designed for small acceptance angles, e.g., to capture direct solar irradiation. Symmetric two-stage systems utilizing an image-forming primary parabolic concentrato …Etendue-matched two-stage concentrators with multiple ...2010-2-1 · 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 ...

Ideal second stages in tandem with parabolic concentrators.

1982-4-1 · 1. Appl Opt. 1982 Apr 1;21(7):1307-9. doi: 10.1364/AO.21.001307. Ideal second stages in tandem with parabolic concentrators. Kritchman EM. Expressions for the concentration capability of parabolic reflectors are derived and extended to include additional ideal second-stage concentration.Progress in the development of two stage concentrated …In this research work, the performance of a novel secondary concentrator in the vacuum receiver of the parabolic trough collector was investigated. The secondary concentrator was designed, the optical and thermal performance analysis is conducted analytically and validated numerically by using Finite Element Analysis based computational software. From the initial optical and …

(PDF) Second-stage concentrators—a new formalism | eli ...

As limit had been postulated and various ideal two-dimensional (2D) optical designs have already been suggested. 2- 6 Ideal the entendue, in turn, uniquely determines the ideal exit aperture of a concentrator,1 0 the expression for aid is the same second-stage concentrators form a special case of ideal con- as for a real source [Eq.(PDF) Asymmetric second-stage concentrators | eli ...Asymmetric second-stage concentrators E. M. Kritchman Given a linear (2-D) primary optical concentrator and a convex close surface of any shape and location (with- in known limits) underneath, an ideal second-stage reflective element that redirects the primary radiation onto a section of that surface may be designedl A useful application is to asymmetric two-stage …

Optics of two-stage photovoltaic concentrators with ...

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. It is found that the two-stage concentrator offers …Contactless efficient two-stage solar concentrator for ...1997-10-1 · This characteristic makes the XX unique and, contrary to current two-stage designs, allows for the location of the secondary outside the evacuated tube. One of the XX concentrators presented achieves an average flux concentration within +/-0.73 deg of 91.1% of the thermodynamic limit with a collection efficiency of 96.8% (i.e., 3.2% of the rays ...

Two-stage solar concentrators based on parabolic troughs ...

While nonimaging concentrators can approach the thermodynamic limit of concentration, they generally suffer from poor compactness when designed for small acceptance angles, e.g., to capture direct solar irradiation. Symmetric two-stage systems utilizing an image-forming primary parabolic concentrator in tandem with a nonimaging secondary concentrator partially …Development of a two-stage solar concentrator using ...Two-stage photovoltaic concentrators with Fresnel lenses as primaries and dielectric totally internally reflecting nonimaging concentrators as secondaries are discussed. The general design ...

(PDF) Asymmetric second-stage concentrators | eli ...

Asymmetric second-stage concentrators E. M. Kritchman Given a linear (2-D) primary optical concentrator and a convex close surface of any shape and location (with- in known limits) underneath, an ideal second-stage reflective element that redirects the primary radiation onto a section of that surface may be designedl A useful application is to asymmetric two-stage …Etendue-matched two-stage concentrators with multiple ...2010-2-15 · OSTI.GOV Journal Article: Etendue-matched two-stage concentrators with multiple receivers Title: Etendue-matched two-stage concentrators with multiple receivers Full Record

Optics of two-stage photovoltaic concentrators with ...

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.Performance model for two-stage optical concentrators for ...OSTI.GOV Journal Article: Performance model for two-stage optical concentrators for solar thermal applications

Ideal second stages in tandem with parabolic concentrators

Starting with of two-stage concentrators, in which ideal second-stage the paraboloid property of stigmatically focusing an elements 6 - 8 are employed to enhance concentration on-axis collimated beam at point 0, the intersection of capability, is derived. any off-axis reflected ray with the focal plane can be found by simple geometrical ...(PDF) Solar Concentrators - ResearchGateThese concentrators have two major benefits; they are ver y compact and off er very high c oncentration. However, ... 3 This is a two-stage concentration process.

New high-flux two-stage optical designs for parabolic ...

1993-1-1 · Abstract. 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.g., at parabola rim half-angles of around 45°). For comparison, the parabolic dish-plus-compound parabolic concentrator secondary design ...Stage Concentrator - an overview | ScienceDirect TopicsBesides, two-stage concept is also used in concentrated photovoltaic systems. Ning et al. [94] investigated the two-stage photovoltaic concentrators with Fresnel lenses as primaries and dielectric internally reflecting non-imaging concentrators as secondaries, which presented the general design principles of such two-stage systems. Their ...

Optics of two-stage photovoltaic concentrators with ...

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.Etendue-matched two-stage concentrators with multiple ...2010-2-15 · OSTI.GOV Journal Article: Etendue-matched two-stage concentrators with multiple receivers Title: Etendue-matched two-stage concentrators with multiple receivers Full Record

Etendue-matched two-stage concentrators with multiple ...

Request PDF | Etendue-matched two-stage concentrators with multiple receivers | A possible way to concentrate sun light is by using a Fresnel reflector: a large number of small mirrors (called ...A two‐stage network with dual partial concentrators ...1993-1-1 · A two‐stage rearrangeable broadcast network (called an ordinary network here) that has been studied recently has a partial concentrator on the input side. We extend this study to a network with two partial concentrators: one on the input side and the other on the output side. We first study the network as a connection network and derive conditions for its rearrangeability. …

Optics of two-stage photovoltaic concentrators with ...

1987-4-1 · 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.Tailored edge-ray concentrators as ideal second stages for ...1993-5-1 · Optics of two-stage photovoltaic concentrators with dielectric second stages. Ning X, O''Gallagher J, Winston R Appl Opt, 26(7):1207-1212, 01 Apr 1987