A study was performed to compare the annual performance of 50 MWe Andasol-like trough plants that employ either a 2-tank or a thermocline-type molten-salt thermal storage system. trnsys software was used to create the plant models and to perform the annual simulations. The annual performance of each plant was found to be nearly identical in the base-case comparison. The reason that the thermocline exhibited nearly the same performance is primarily due to the ability of many trough power blocks to operate at a temperature that is significantly below the design point. However, if temperatures close to the design point are required, the performance of the 2-tank plant would be significantly better than the thermocline.

References

References
1.
Electric Power Research Institute
, 2010, “
Solar Thermocline Storage Systems—Preliminary Design Study
,” Electric Power Research Institute, Palo Alto, CA, Project 1019581.
2.
Sergio
,
R.
, and
Gutierrez
,
Y.
, 2008,
Real Application of Molten Salt Thermal Storage to Obtain High Capacity Factors in Parabolic Trough Plants
,
SENER, SolarPACES
,
Las Vegas, NV
.
4.
Patnode
,
A.
, 2006, “
Simulation and Performance Evaluation of Parabolic Trough Solar Power Plants
,” M.Sc. thesis, University of Wisconsin.
5.
Frank
,
L.
, 1995,
Simulation of the Part-Load Behavior of a 30 MWe SEGS Plant
, SAND95-1293.
6.
Geyer
et al.
, 2006,
Dispatchable Solar Electricity for Summerly Peak Loads from the Solar Thermal Projects Andasol 1 Y Andasol 2 (sic)
,
Solar Millennium, SolarPACES
,
Seville, Spain
.
7.
Kolb
,
G.
, and
Hassani
,
V.
, 2006, “
Performance Analysis of Thermocline Energy Storage Proposed for the 1 MW Saguaro Solar Trough Plant
,”
Proceedings of the ISEC 2006 ASME International Solar Energy Conference
, July 8–13,
Denver, CO
.
8.
Yang
,
Z.
, and
Garimella
,
S.
, 2010,
“Thermal Analysis of Solar Thermal Energy Storage in a Molten-salt Thermocline,”
Solar Energy
,
84
, pp.
974
985
.
9.
Pacheco
,
J.
,
Showalter
,
S.
, and
Kolb
,
W.
, 2002,
“Development of a Molten-Salt Thermocline Thermal Storage System for Parabolic Trough Plants,”
J. Sol. Energy Eng.
,
124
, pp.
153
.
10.
Faas
,
S.
,
Thorne
,
L.
,
Fuchs
,
E.
, and
Gilbertsen
,
N.
, 1986,
10 MWe Solar Thermal Central Receiver Pilot Plant: Thermal Storage Subsystem Evaluation— Final Report
, SAND86-8212, Sandia National Laboratories, Livermore, CA.
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