Internally insulated thermal storage system development program. Final report. [Molten salt]
The primary objective of this program is to define a cost effective thermal storage system for a solar central receiver power system using molten salt stored in internally insulated carbon steel tanks. This effort was divided into five tasks. The scope of these tasks were: (1) Task 1, internal insulation materials test program: screening tests of candidate insulation materials were conducted by exposing them in 866°K (1100°F) molten salt for 500 hours. Materials selected from these tests were exposed to 866/sup 0/K salt for up to 5000 hours; (2) Task 2, internally insulated thermocline storage tank analysis: a computer thermal model of internally insulated thermocline tanks was developed to predict thermocline behavior under various operational strategies; (3) Task 3, storage tank design: a preliminary design study and optimization was made of both an externally insulated carbon steel tank for 561°K (550°F) molten salt and an internally/externally insulated carbon steel tank for 839°K (1050°F) molten salt; (4) Task 4, storage system parametric analyses: a computer cost optimization was performed to find the optimum configuration for each of three different storage concepts - thermocline, dual-tank, and cascade systems. The analyses were done as a function of storage size and considered the following factors: tank geometry; number of tanks; insulation type, thickness, and cost; storage use rate; heat loss rate and its impact on upstream costs (heliostats, etc.); and others; (5) Task 5, storage subsystem research experiment (SRE): based on the conclusions of Tasks 1 through 4, a subsystem research experiment was proposed that would demonstrate both fabrication and performance of the major components of the recommended storage design. Results are detailed.
- Research Organization:
- Martin Marietta Aerospace, Denver, CO (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EY-76-C-04-0789
- OSTI ID:
- 5578631
- Report Number(s):
- SAND--80-8175
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
140702 -- Solar Thermal Power Systems-- Central Receiver
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25 ENERGY STORAGE
250600 -- Energy Storage-- Thermal
ANALYTICAL SOLUTION
COMPATIBILITY
CONTAINERS
CONVECTION
CSP
Concentrating Solar Power
DESIGN
DIAGRAMS
ENERGY STORAGE
EQUIPMENT
GEOMETRY
HEAT STORAGE
MATERIALS TESTING
MATHEMATICAL MODELS
MATHEMATICS
MOLTEN SALTS
NATURAL CONVECTION
OPTIMIZATION
PARAMETRIC ANALYSIS
PHYSICAL PROPERTIES
POWER PLANTS
REFRACTORIES
RESEARCH PROGRAMS
SALTS
SENSIBLE HEAT STORAGE
SIZE
SOLAR POWER PLANTS
SOLAR THERMAL POWER PLANTS
STORAGE
TANKS
TESTING
THERMAL CONDUCTIVITY
THERMAL CYCLING
THERMAL ENERGY STORAGE EQUIPMENT
THERMAL INSULATION
THERMODYNAMIC PROPERTIES
TOWER FOCUS POWER PLANTS