0
Journal of Solar Energy Engineering | Volume 132 | Issue 2 | Research Paper
Research Papers

Development of a Thermal Energy Storage System for Parabolic Trough Power Plants With Direct Steam Generation

[+] Author and Article Information
Doerte Laing

German Aerospace Center (DLR ), Institute of Technical Thermodynamics, Pfaffenwaldring 38-40, 70569 Stuttgart, Germanydoerte.laing@dlr.de

Thomas Bauer, Dorothea Lehmann

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

Carsten Bahl

Technical Department, Ed. Züblin AG, Albstadtweg 3, 70567 Stuttgart, Germany

J. Sol. Energy Eng 132(2), 021011 (May 10, 2010) (8 pages) doi:10.1115/1.4001472 History: Received September 29, 2009; Revised March 18, 2010; Published May 10, 2010; Online May 10, 2010
Article
References
Figures
Tables
Citing Articles

For future parabolic trough plants direct steam generation in the absorber pipes is a promising option for reducing the costs of solar thermal power generation. These new solar thermal power plants require innovative storage concepts, where the two-phase heat transfer fluid poses a major challenge. A three-part storage system is proposed where a phase change material (PCM) storage will be deployed for the two-phase evaporation, while concrete storage will be used for storing sensible heat, i.e., for preheating of water and superheating of steam. A pinch analysis helps to recognize interface constraints imposed by the solar field and the power block and describes a way to dimension the latent and sensible components. Laboratory test results of a PCM test module with ∼140 kgNaNO3, applying the sandwich concept for enhancement of heat transfer, are presented, proving the expected capacity and power density. The concrete storage material for sensible heat was improved to allow the operation up to 500°C for direct steam generation. A storage system with a total storage capacity of ∼1 MWh is described, combining a PCM module and a concrete module, which will be tested in 2009 under real steam conditions around 100 bars.
FIGURES IN THIS ARTICLE
<>
Copyright © 2010 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
+Overview of a three-part thermal energy storage system for DSG combining sensible and latent heat storages
View Large  |  Save Figure  |  Download Slide (.ppt)
Overview of a three-part thermal energy storage system for DSG combining sensible and latent heat storages
Figure 1

Overview of a three-part thermal energy storage system for DSG combining sensible and latent heat storages

Grahic Jump Location
+Boundary conditions in a three-part thermal energy storage system for DSG combining sensible and latent heat storages
View Large  |  Save Figure  |  Download Slide (.ppt)
Boundary conditions in a three-part thermal energy storage system for DSG combining sensible and latent heat storages
Figure 2

Boundary conditions in a three-part thermal energy storage system for DSG combining sensible and latent heat storages

Grahic Jump Location
+Pie charts illustrating the division of the total amount of heat into the three parts of the storage system during charge at 107 bars (left) and discharge at 81 bars (right)
View Large  |  Save Figure  |  Download Slide (.ppt)
Pie charts illustrating the division of the total amount of heat into the three parts of the storage system during charge at 107 bars (left) and discharge at 81 bars (right)
Figure 3

Pie charts illustrating the division of the total amount of heat into the three parts of the storage system during charge at 107 bars (left) and discharge at 81 bars (right)

Grahic Jump Location
+Diagram of the water/steam temperature over the amount of heat stored/released, case A: storage system outlet temperature during charge equals the final feed water temperature of 260°C
View Large  |  Save Figure  |  Download Slide (.ppt)
Diagram of the water/steam temperature over the amount of heat stored/released, case A: storage system outlet temperature during charge equals the final feed water temperature of 260°C
Figure 4

Diagram of the water/steam temperature over the amount of heat stored/released, case A: storage system outlet temperature during charge equals the final feed water temperature of 260°C

Grahic Jump Location
+Diagram of the water/steam temperature over the amount of heat stored/released, case B: storage system outlet temperature raised
View Large  |  Save Figure  |  Download Slide (.ppt)
Diagram of the water/steam temperature over the amount of heat stored/released, case B: storage system outlet temperature raised
Figure 5

Diagram of the water/steam temperature over the amount of heat stored/released, case B: storage system outlet temperature raised

Grahic Jump Location
+NaNO3 PCM storage test module
View Large  |  Save Figure  |  Download Slide (.ppt)
NaNO3 PCM storage test module
Figure 6

NaNO3 PCM storage test module

Grahic Jump Location
+Experimental results of a typical charge/discharge cycle
View Large  |  Save Figure  |  Download Slide (.ppt)
Experimental results of a typical charge/discharge cycle
Figure 7

Experimental results of a typical charge/discharge cycle

Grahic Jump Location
+Superposition of reference cycle runs 2927 h, 3574 h, and 3867 h after start of operation
View Large  |  Save Figure  |  Download Slide (.ppt)
Superposition of reference cycle runs 2927 h, 3574 h, and 3867 h after start of operation
Figure 8

Superposition of reference cycle runs 2927 h, 3574 h, and 3867 h after start of operation

Grahic Jump Location
+Mass losses of aggregates in oven experiment
View Large  |  Save Figure  |  Download Slide (.ppt)
Mass losses of aggregates in oven experiment
Figure 9

Mass losses of aggregates in oven experiment

Grahic Jump Location
+Mass losses of concrete samples in oven experiment
View Large  |  Save Figure  |  Download Slide (.ppt)
Mass losses of concrete samples in oven experiment
Figure 10

Mass losses of concrete samples in oven experiment

Grahic Jump Location
+Compressive strength measurement of concrete
View Large  |  Save Figure  |  Download Slide (.ppt)
Compressive strength measurement of concrete
Figure 11

Compressive strength measurement of concrete

Grahic Jump Location
+Schematic layout of the test-loop
View Large  |  Save Figure  |  Download Slide (.ppt)
Schematic layout of the test-loop
Figure 12

Schematic layout of the test-loop

Grahic Jump Location
+PCM module of the pilot scale steam storage
View Large  |  Save Figure  |  Download Slide (.ppt)
PCM module of the pilot scale steam storage
Figure 13

PCM module of the pilot scale steam storage

Grahic Jump Location
+Concrete module of the pilot scale steam storage
View Large  |  Save Figure  |  Download Slide (.ppt)
Concrete module of the pilot scale steam storage
Figure 14

Concrete module of the pilot scale steam storage

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
New Generation Reactors
Energy and Power Generation Handbook> Chapter 23
Scope of Section I, Organization, and Service Limits
Power Boilers> Chapter 1
Combined Cycle Power Plant
Energy and Power Generation Handbook> Chapter 27
Introduction
Consensus on Operating Practices for Control of Water and Steam Chemistry in Combined Cycle and Cogeneration> Chapter 1
Threshold Functions
Closed-Cycle Gas Turbines> Chapter 3
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In