Molten salt thermal energy storage subsystem for solar thermal central receiver plants
The development of a low cost thermal energy storage subsystem for large solar plants is described. Molten nitrate salt is used as both the solar plant working fluid and the storage medium. The storage system consists of a specially designed hot tank to hold salt at a storage temperature of 839K (1050 deg F) and a separate carbon steel cold tank to hold the salt after its thermal energy has been extracted to generate steam. The hot tank is lined with insulating firebrick to reduce the shell temperature to 561K (550 deg F) so that a low cost carbon steel shell is used. The internal insulation is protected from the hot salt by a unique metal liner with orthogonal corrugations to allow for numerous cycles of thermal expansion and contraction. A preliminary design for a large commercial size plant (1200 MWh sub +), a laboratory test program for the critical components, and the design, construction, and test of a small scale (7 MWH sub t) research experiment at the Central Receiver Test Facility in Albuquerque, New Mexico is described.
- Research Organization:
- Martin Marietta Aerospace, Denver, CO (USA)
- OSTI ID:
- 5646879
- Report Number(s):
- N-8325083; CONF-810940-
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
140702 -- Solar Thermal Power Systems-- Central Receiver
142000* -- Solar Energy-- Heat Storage-- (1980-)
CENTRAL RECEIVER TEST FACILITY
CENTRAL RECEIVERS
COST
DESIGN
ENERGY STORAGE
ENERGY TRANSFER
EQUIPMENT
EXPANSION
FUNCTIONAL MODELS
HEAT STORAGE
HEAT TRANSFER
LATENT HEAT STORAGE
MOLTEN SALTS
NITRATES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PILOT PLANTS
POWER PLANTS
SALTS
SOLAR POWER PLANTS
SOLAR RECEIVERS
SOLAR THERMAL POWER PLANTS
SPECIFIC HEAT
SPECIFICATIONS
STORAGE
TEST FACILITIES
THERMAL ENERGY STORAGE EQUIPMENT
THERMAL EXPANSION
THERMAL POWER PLANTS
THERMODYNAMIC PROPERTIES
TOWER FOCUS POWER PLANTS