Development Steps for Parabolic Trough Solar Power Technologies With Maximum Impact on Cost Reduction

[+] Author and Article Information
Robert Pitz-Paal

 Deutsches Zentrum für Luft und Raumfahrt e.V., D-51147 Köln, GermanyRobert.Pitz-Paal@dlr.de

Jürgen Dersch, Barbara Milow

 Deutsches Zentrum für Luft und Raumfahrt e.V., D-51147 Köln, Germany

Félix Téllez

Centro de Investigaciones Energéticas, Medioambientales y Technológicas,  CIEMAT, E-28040 Madrid, Spain

Alain Ferriere

 Centre National de la Recherche Scientifique, F-66125 Font-Romeu, France

Ulrich Langnickel

 VGB PowerTech e.V., D-45136 Essen, Germany

Aldo Steinfeld

 ETH Zurich, 8092 Zurich, Switzerland, and  Paul Scherrer Institute, 5232 Villigen, Switzerland

Jacob Karni

 Weizmann Institute of Science, IL-76100 Rehovot, Israel

Eduardo Zarza

Centro de Investigaciones Energéticas, Medioambientales y Technológicas,  CIEMAT-PSA, E-04200 Tabernas, Spain

Oleg Popel

Institute for High Temperatures,  Russian Academy of Sciences, RU-125412 Moscow, Russia

J. Sol. Energy Eng 129(4), 371-377 (Aug 24, 2006) (7 pages) doi:10.1115/1.2769697 History: Received July 02, 2005; Revised August 24, 2006

Besides continuous implementation of concentrating solar power plants (CSP) in Europe, which stipulate cost reduction by mass production effects, further R&D activities are necessary to achieve the cost competitiveness to fossil power generation. The European Concentrated Solar Thermal Roadmap (ECOSTAR) study that was conducted by European research institutes in the field of CSP intends to stipulate the direction for R&D activities in the context of cost reduction. This paper gives an overview about the methodology and the results for one of the seven different CSP system concepts that are currently under promotion worldwide and considered within ECOSTAR. The technology presented here is the parabolic trough with direct steam generation (DSG), which may be considered as an evolution of the existing parabolic systems with thermal oil as heat transfer fluid. The methodology is explained using this exemplary system, and the technical improvements are evaluated according to their cost-reduction potential using a common approach, based on an annual performance model. Research priorities are given based on the results. The simultaneous implementation of three measures is required in order to achieve the cost-reduction target: Technical improvement by R&D, upscaling of the unit size, and mass production of the equipment.

Copyright © 2007 by American Society of Mechanical Engineers
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Figure 1

Methodology for the cost studies

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Figure 2

Simplified scheme of the INDITEP power plant

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Figure 3

Results of annual performance calculation for solar-only operation of the DSG parabolic trough plant (reference system, ten single units of 4.7MW each)

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Figure 4

Investment breakdown of the reference system DSG parabolic trough power plant. (10×4.7MW, left) and the upscaled plant (one unit, 47MW, right)

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Figure 5

Cost-reduction potential of different innovations for parabolic trough DSG systems compared to parabolic trough DSG reference system. For all systems shown in this figure, a 47MWe single power block unit was assumed.

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Figure 6

Cumulative cost reduction scenario of parabolic trough DSG systems compared to a 50MW parabolic trough with oil system (reference LEC: 0.172€∕kWhe)

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Figure 7

Cost-reduction potential for solar thermal power plants using parabolic trough collectors and DSG by different mechanisms



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