Ideal 3D asymmetric concentrator

Garcı́a-Botella, Ángel; Fernández-Balbuena, Antonio Álvarez; Vázquez, Daniel; Bernabéu, Eusebio

doi:10.1016/j.solener.2008.07.004

Cited by 20 publications

(10 citation statements)

References 8 publications

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“…10,11 With a simple treatment of infinitely extrusion of a twodimensional (2-D) cross section, one can find that the 2-D flowline vector is always bisecting the two extreme rays of the flowline source 9,12 (Fig. 4).…”

Section: String and Flowlinementioning

confidence: 99%

Thermodynamic origin of nonimaging optics

Jiang

Winston

2016

J. Photon. Energy

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Abstract. Nonimaging optics is the theory of thermodynamically efficient optics and as such depends more on thermodynamics than on optics. Hence, in this paper, a condition for the "best" design is proposed based on purely thermodynamic arguments, which we believe has profound consequences for the designs of thermal and even photovoltaic systems. This way of looking at the problem of efficient concentration depends on probabilities, the ingredients of entropy and information theory, while "optics" in the conventional sense recedes into the background. Much of the paper is pedagogical and retrospective. Some of the development of flowline designs will be introduced at the end and the connection between the thermodynamics and flowline design will be graphically presented. We will conclude with some speculative directions of where the ideas might lead.

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Section: String and Flowlinementioning

confidence: 99%

Thermodynamic origin of nonimaging optics

Jiang

Winston

2016

J. Photon. Energy

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“…Non imaging optical concentrators that indicate that the receiver is not involved in the formation of an image on it by optical concentrator [8].…”

Section: A Lcpv and Hcpvmentioning

confidence: 99%

“…Solar concentrators are finding increasing applications in: Photovoltaic power generation [1][2][3][4]; Steam turbine power generation [5][6][7] and energy storage systems [8]. There is also possibility of future applications of solar concentrators in thermionic power generation, the latter being much easier, simpler than power generation through other means such as steam turbine, photovoltaic systems etc.…”

Section: Introductionmentioning

confidence: 99%

A brief review of solar concentrators

Olawole

2015

2015 International Conference on Energy Economics and Environment (ICEEE)

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For efficient and cost effective utilization Solar energy solar concentrators are vital. These are finding increasing applications in many solar energy applications such as concentrated solar photovoltaics, solar steam power generation, solar energy storage, solar cooking etc.. In this brief review we discuss the various types of solar concentrators, their current applications, advantages and disadvantages. We also suggest future new applications of solar concentrators.

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“…Winston and Welford introduced the concept of the geometric vector flux J [3], where the direction of J is the flow line, and showed that ideal flux concentrators have shapes that do not disturb the geometric vector flux field. On the other hand, Moon and Spencer [4] used an analogous concept, the pharosage vector, to study the vector flux field from Lambertian illuminators, developing the so-called photic field theory, that has been used to design concentrators [5,6]. The analogy between these two methods is due to the fact that flux and field are intimately related concepts.…”

Section: Introductionmentioning

confidence: 99%

Hyperparabolic concentrators

et al. 2009

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We present a family of three-dimensional concentrators constructed from the photic field generated by a Lambertian emitter. The profile of these concentrators is obtained from the field lines for a two-dimensional truncated wedge and is based on the union between a hyperbola and a tilted parabola. By revolution of this profile, we obtain hyperparabolic concentrators (HPCs). In the limiting case when the focal length of the hyperbola becomes the radius of the exit aperture, the HPC becomes the well-known compound parabolic concentrator. On the other hand, when the focal length of the hyperbola becomes infinite, the HPC achieves the thermodynamic limit of concentration.

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Ideal 3D asymmetric concentrator

Cited by 20 publications

References 8 publications

Thermodynamic origin of nonimaging optics

Thermodynamic origin of nonimaging optics

A brief review of solar concentrators

Hyperparabolic concentrators

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