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TECHNICAL PAPERS

Direct Steam Generation in Parabolic Troughs: First Results of the DISS Project

[+] Author and Article Information
M. Eck, W.-D. Steinmann

German Aerospace Center (DLR), Institute of Technical Thermodynamics, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany

J. Sol. Energy Eng 124(2), 134-139 (Apr 24, 2002) (6 pages) doi:10.1115/1.1464125 History: Revised November 01, 2000; Received May 01, 2001; Online April 24, 2002
Copyright © 2002 by ASME
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References

Figures

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Basic concepts considered for solar steam generation in parabolic troughs
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Photo of the DISS test facility
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Temperature and pressure of the fluid at the outlet of the collector loop measured on the 4th of July 2000; Operation in recirculation mode
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Measured and simulated maximum temperature gradient along the collector loop for a test in recirculation mode at solar noon (p=30 bar,R=1)
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Measured maximum temperature gradient profile for tests in recirculation mode for different recirculation rates (p=30 bar)
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Measured and simulated (−) pressure profile along the collector loop for different recirculation rates and a steam mass flux of 0.4 kg/s (p=30 bar)
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Measured steam temperature at the collector outlet and the maximum temperature gradient in the cross section at the position of 404 m for a test in once-through mode (p=30 bar)
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Measured and simulated steam temperature after a temporary shading of the 10th and 11th collector for a test in recirculation mode (p=30 bar)
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Measured fluid temperatures after a temporary shading of the 1st collector for a test in recirculation mode (p=30 bar)
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Measured steam mass flux and the position of collector 1 (0=defocused) for the test of Fig. 8
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Measured fluid temperatures after a temporary shading of the 1st collector for a test in once-through mode (p=30 bar)
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Measured steam mass flux at the collector loop outlet and the position of collector 1 (0=defocused) for the test of Fig. 11
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Schematic design of a cyclone separator (in the style of 117)
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Schematic design of one collector loop with a T-junction as a phase separator

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