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Title: Suction-recirculation device for stabilizing particle flows within a solar powered solid particle receiver

Abstract

A suction-recirculation device for stabilizing the flow of a curtain of blackened heat absorption particles falling inside of a solar receiver with an open aperture. The curtain of particles absorbs the concentrated heat from a solar mirror array reflected up to the receiver on a solar power tower. External winds entering the receiver at an oblique angle can destabilize the particle curtain and eject particles. A fan and ductwork is located behind the back wall of the receiver and sucks air out through an array of small holes in the back wall. Any entrained particles are separated out by a conventional cyclone device. Then, the air is recirculated back to the top of the receiver by injecting the recycled air through an array of small holes in the receiver's ceiling and upper aperture front wall. Since internal air is recirculated, heat losses are minimized and high receiver efficiency is maintained. Suction-recirculation velocities in the range of 1-5 m/s are sufficient to stabilize the particle curtain against external wind speeds in excess of 10 m/s.

Inventors:
 [1]
  1. Albuquerque, NM
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1037763
Patent Number(s):
8109265
Application Number:
12/368,327
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F24 - HEATING F24S - SOLAR HEAT COLLECTORS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Kolb, Gregory J. Suction-recirculation device for stabilizing particle flows within a solar powered solid particle receiver. United States: N. p., 2012. Web.
Kolb, Gregory J. Suction-recirculation device for stabilizing particle flows within a solar powered solid particle receiver. United States.
Kolb, Gregory J. Tue . "Suction-recirculation device for stabilizing particle flows within a solar powered solid particle receiver". United States. https://www.osti.gov/servlets/purl/1037763.
@article{osti_1037763,
title = {Suction-recirculation device for stabilizing particle flows within a solar powered solid particle receiver},
author = {Kolb, Gregory J},
abstractNote = {A suction-recirculation device for stabilizing the flow of a curtain of blackened heat absorption particles falling inside of a solar receiver with an open aperture. The curtain of particles absorbs the concentrated heat from a solar mirror array reflected up to the receiver on a solar power tower. External winds entering the receiver at an oblique angle can destabilize the particle curtain and eject particles. A fan and ductwork is located behind the back wall of the receiver and sucks air out through an array of small holes in the back wall. Any entrained particles are separated out by a conventional cyclone device. Then, the air is recirculated back to the top of the receiver by injecting the recycled air through an array of small holes in the receiver's ceiling and upper aperture front wall. Since internal air is recirculated, heat losses are minimized and high receiver efficiency is maintained. Suction-recirculation velocities in the range of 1-5 m/s are sufficient to stabilize the particle curtain against external wind speeds in excess of 10 m/s.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {2}
}

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Works referenced in this record:

Design and On-Sun Testing of a Solid Particle Receiver Prototype
conference, January 2008


Central-Station Solar Hydrogen Power Plant
journal, April 2006


An Experimental and Numerical Study of Flow and Convective Heat Transfer in a Freely Falling Curtain of Particles
journal, June 1988