The DISS Project: Direct Steam Generation in Parabolic Trough Systems. Operation and Maintenance Experience and Update on Project Status

[+] Author and Article Information
Eduardo Zarza, Loreto Valenzuela, Javier León

CIEMAT-Plataforma Solar de Almerı́a, Apartado 22, Tabernas E-04200 Almerı́a, Spain

H.-Dieter Weyers, Martin Eickhoff

DLR-Plataforma Solar de Almerı́a, Apartado 39, Tabernas E-04200 Almerı́a, Spain

Markus Eck

Institut für Technische Thermodynamik-DLR, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germanye-mail: markus.eck@dlr.de

Klaus Hennecke

Solare Energietechnik-DLR, D-51170 Köln, Germanye-mail: klaus.hennecke@dlr.de

J. Sol. Energy Eng 124(2), 126-133 (Apr 24, 2002) (8 pages) doi:10.1115/1.1467645 History: Received November 01, 2000; Revised July 01, 2001; Online April 24, 2002
Copyright © 2002 by ASME
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Langenkamp, J., 1998, “Revised LEC Projections and Discussion of Different DGS Benefits.” Project DISS Technical Report DISS-SC–QA–02. Almerı́a, Spain.
United States Naval Observatory, 1998, “Multiyear Interactive Computer Almanac 1990-2005,” Version 1.5. Willmann-Bell Inc, Virginia.
Blanco,  M., Alarcón,  D., and López,  T., 2000, “Computing the Solar Vector,” Sol. Energy, 70(5), p. 2001.
Eck, M., and Steinmann, W.-D., 2001, “Direct Steam Generation in Parabolic Troughs: Results of the DISS Project.” Proc. of Forum 2001 Conference of ASME Solar Division, Washington, DC.
Harats, Y., and Kearney, D., 1989, “Advances in Parabolic Trough Technology in the SEGS Plants,” ASME Int. Solar Energy Conf., San Diego, CA.
Garcı́a, X., 2000, “Overall Energetic Comparison of DSG and Oil-Based Parabolic Trough Systems with Rankine Cycles for Electricity Generation.” Project DISS Technical Report DISS-SC–QA–06. Almerı́a, Spain.


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Schematic diagram of the PSA DISS test facility
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Three basic DSG processes: once-through (top), injection (center), and recirculation (bottom)
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View of the PSA DISS solar field in operation
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Positioning errors that would be produced by deviation in the North-South alignment of the DISS collector row, latitude, and longitude of the PSA site
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Operation at 60 bar in recirculation mode on June 20, 2000
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Test Cross-Section thermocouple layout
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Thermocouple installation in a test cross section
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Control scheme for the recirculation process
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Operation in recirculation mode on June 22, 2000 with outlet temperature control from 12:45 to 18:30; Outlet pressure control and secondary controllers in automatic mode (recirculation rate=2)
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Once-through process control scheme
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One of the ball joints installed at the DISS collectors



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