Design of Integrated Heat Exchanger into Solar Absorber for Affordable Small-scale Concentrated Solar Power Generation (SCU)

a solar absorber and heat exchanger technology, applied in the field of solar energy devices, can solve the problems of large area to achieve sufficient conversion efficiency for the cost of the system, limited conversion efficiency, and inability to meet the economic needs of small-scale concentrated solar power generation

Inactive Publication Date: 2013-09-12
LEE HOHYUN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing dish systems require large areas to achieve sufficient conversion efficiency for the cost of the system.
In addition, the conversion efficiencies which have been achieved are limited by the materials and manufacturing processes used.
Moreover, a solar absorber for small scale CSP has not been eco

Method used

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  • Design of Integrated Heat Exchanger into Solar Absorber for Affordable Small-scale Concentrated Solar Power Generation (SCU)
  • Design of Integrated Heat Exchanger into Solar Absorber for Affordable Small-scale Concentrated Solar Power Generation (SCU)
  • Design of Integrated Heat Exchanger into Solar Absorber for Affordable Small-scale Concentrated Solar Power Generation (SCU)

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Embodiment Construction

[0011]In one aspect, a scalable and modular concentrated solar thermal dish-Brayton system is provided in response to growing demand for renewable energy and distributed power generation. One embodiment of the current invention reduces production costs and creates a viable small-scale solar power system for home or neighborhood use by achieving better conversion efficiency.

[0012]One embodiment of the invention includes a low cost, high efficiency solar receiver with the capability to achieve much higher operating temperatures than current receivers. The current embodiment of the invention uses a cylindrical shaped blackbody cavity to absorb solar radiation at a temperature of about 1700 K, much higher than existing receivers at 1250 K. This is made possible by using silicon carbide to manufacture the cavity. The fabricated cylindrical part boasts high absorption and thermal conductivity at a low fabrication cost. The advantage of the high absorption allows for the cylindrical design...

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Abstract

A solar absorber for a concentrated solar power (CSP) dish system includes a cylindrically shaped blackbody cavity receiver fused to a cylindrically shaped heat exchanger shell covering the receiver to form a monolithic cavity receiver and heat exchanger. An exterior surface of the cavity receiver has grooves embedded to create a duct spiraling about the exterior of the cavity receiver so that the duct forms tubes of a tube-style heat exchanger when covered by the heat exchanger shell. An interior diameter of the cavity receiver is greater than or equal to a diameter of an aperture of the cavity receiver, and a longitudinal interior depth of the cavity is greater than or equal to twice the interior diameter of the cavity receiver. The monolithic solar absorber is preferably composed of a ceramic material such as silicon carbide having emissivity greater than 0.9.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority from U.S. Provisional Patent Application 61 / 607,747 filed Mar. 7, 2012, which is incorporated herein by reference.STATEMENT OF GOVERNMENT SPONSORED SUPPORT[0002]This invention was made with Government support under contract SU-83603201 awarded by U.S. Environmental Protection Agency. The Government has certain rights in this invention.FIELD OF THE INVENTION[0003]The present invention relates generally to solar energy devices. More particularly, the invention relates to solar absorbers for concentrated solar power (CSP) dish systems.BACKGROUND OF THE INVENTION[0004]Concentrated Solar Power (CSP) technology seeks to replace fossil fuels in mechanical compression cycles for power generation. Existing dish systems require large areas to achieve sufficient conversion efficiency for the cost of the system. In addition, the conversion efficiencies which have been achieved are limited by the materials and manufact...

Claims

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Application Information

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IPC IPC(8): F24J2/26F24J2/48F24J2/24F24S10/70F24S10/75
CPCF24J2/266F24J2/242F24J2/484F24J2/07Y02B10/20Y02E10/41Y02E10/44F24S20/20F24S10/72F24S10/754F24S70/16Y02E10/40
Inventor LEE, HOHYUNNEBER, MATTHEW
Owner LEE HOHYUN
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