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The Potential of direct steam Generation in Parabolic Troughs - Results of the German Project DIVA

Eck, Markus and Benz, Nikolaus and Feldhoff, Jan-Fabian and Gilon, Yoel and Hacker, Zdenek and Müller, Thomas and Riffelmann, Klaus-Jürgen and Silmy, Kamel and Tislaric, Daniel (2008) The Potential of direct steam Generation in Parabolic Troughs - Results of the German Project DIVA. In: 14th International Symposium on Concentrated Solar Power and Chemical Energy Technologies. 14th International Symposium on Concentrated Solar Power and Chemical Energy Technologies, 2008-03-03 - 2008-03-07, Las Vegas (USA).

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Abstract

The direct steam generation (DSG) in parabolic trough collectors is a promising option to improve the mature SEGS type parabolic trough solar thermal power plant technology. According to previous studies the cost reduction of the DSG process compared to the SEGS technology is expected to be 8 to 25 %. All theses studies were more or less preliminary since they lacked detailed information on the design of collector fields, absorber tubes required for steam temperatures higher than 400°C and power blocks adapted to the specific needs of the direct steam generation. To bridge this gap, a detailed system analysis was performed within the German R+D project DIVA. Power blocks and collector fields were designed for four different capacities (5, 10, 50 and 100 MW) and different live steam parameters. The live steam temperature was varied between saturation temperature and 500°C and live steam pressures of 40, 64 and 100 bar were analyzed. The thermal efficiency of the collector operated at temperatures higher than 400°C was calculated based on latest results of SCHOTT’s high temperature selective coating development. To assess the different cases, detailed yield analysis of the overall system were performed using hourly data for the direct normal irradiation and the ambient temperature for typical years. Based on these results the levelized costs of electricity were determined for all cases and the most promising parameters were identified.

Document Type:Conference or Workshop Item (Speech)
Title:The Potential of direct steam Generation in Parabolic Troughs - Results of the German Project DIVA
Authors:
AuthorsInstitution or Email of Authors
Eck, MarkusUNSPECIFIED
Benz, NikolausSCHOTT Solar CSP GmbH
Feldhoff, Jan-FabianUNSPECIFIED
Gilon, YoelFlagsol GmbH
Hacker, ZdenekSCHOTT Solar CSP GmbH
Müller, ThomasSiemens
Riffelmann, Klaus-JürgenFlagsol GmbH
Silmy, KamelSCHOTT Solar CSP GmbH
Tislaric, DanielSiemens
Date:March 2008
Journal or Publication Title:14th International Symposium on Concentrated Solar Power and Chemical Energy Technologies
Refereed publication:No
In ISI Web of Science:No
Status:Published
Keywords:Direct steam generation, parabolic trough collector, absorber tubes, solar thermal power plant, system analysis
Event Title:14th International Symposium on Concentrated Solar Power and Chemical Energy Technologies
Event Location:Las Vegas (USA)
Event Type:international Conference
Event Dates:2008-03-03 - 2008-03-07
Organizer:SolarPACES
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:E SF - Solar research (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Applikationsentwicklung (old)
Location: Stuttgart
Institutes and Institutions:Institute of Technical Thermodynamics > Solar Research
Deposited By: Michael Wittmann
Deposited On:14 Jan 2009
Last Modified:12 Dec 2013 20:35

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