Ideal second stages in tandem with parabolic concentrators
Applied Optics
|April 15, 2010
Summary
Concentration capability of parabolic reflectors was analyzed. Two-stage systems approach ideal limits, surpassing single parabolic reflectors in 2-D geometry for enhanced solar energy applications.
Area of Science:
- Optical Engineering
- Solar Energy Concentration
Background:
- Parabolic reflectors are crucial for concentrating solar energy.
- Understanding concentration limits is key to improving efficiency.
Purpose of the Study:
- Derive expressions for the concentration capability of parabolic reflectors.
- Investigate the impact of second-stage concentration.
Main Methods:
- Mathematical derivation of concentration capability expressions.
- Analysis of two-dimensional (2-D) geometry.
Main Results:
- A single parabolic reflector achieves half the ideal concentration limit in 2-D.
- Two-stage configurations approach the ideal limit at high f/Nos.
Conclusions:
- Two-stage systems offer superior concentration performance over single reflectors.
- Optimizing f/Nos is critical for maximizing two-stage concentration efficiency.
More Related Videos
Related Concept Videos
01:26Reflective Property of Parabolas
A parabola is a basic type of conic section that results from the intersection of a plane with a double-napped cone in a direction parallel to one of the cone's sides. This U-shaped curve has a distinctive reflective property: all incoming rays parallel to its axis of symmetry are directed toward a single point, known as the focus. This property is widely utilized in optical and communication technologies that require precise signal concentration.In analytic geometry, a parabola is defined as...
01:21Tandem Mass Spectrometry
Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
01:16Centroid for the Paraboloid of Revolution
The paraboloid of revolution is an axially symmetric surface generated by rotating a parabola around its axis. This shape has several applications in mechanical engineering due to its advantageous structural properties, such as strength against stress concentration points and rotational symmetry.
The centroid for the paraboloid of revolution is the point where all the mass of the paraboloid is concentrated. This centroid is important for engineering applications, as it determines how forces are...
The centroid for the paraboloid of revolution is the point where all the mass of the paraboloid is concentrated. This centroid is important for engineering applications, as it determines how forces are...
01:15Optimizing Chromatographic Separations
Optimizing chromatographic separations is crucial for obtaining clean separations in a minimum amount of time. Optimization is required for several factors, including kinetic effects related to band broadening, plate height, capacity factor, and separation factor.
Band broadening refers to spreading solute bands as they travel through the column. This broadening can impact resolution. Plate height (H) represents the length required for one theoretical plate. A lower plate height corresponds to...
Band broadening refers to spreading solute bands as they travel through the column. This broadening can impact resolution. Plate height (H) represents the length required for one theoretical plate. A lower plate height corresponds to...