Solar central receiver hybrid power system, Phase I. Volume 1. Executive summary. Final technical report, October 1978-August 1979

Technical Report · Sat Sep 01 00:00:00 EDT 1979

DOI:https://doi.org/10.2172/5146291· OSTI ID:5146291

The Martin Marietta team has conducted system analyses and conceptual designs of hybrid systems employing molten salt (60% NaNO/sub 3/, 40% KNO/sub 3/) heat transfer/storage media using a solar central receiver and a fossil-fired nonsolar energy source (coal, oil or gas). System- and subsystem-level analyses were performed to develop preferred system configurations using various amounts of solar storage capacities and fossil fuels. The various systems in this report are based on a technical approach that promotes higher conversion efficiencies, greater operational flexibility, and lower net energy costs than first generation water/steam receiver technology. In fact, the analysis shows that in the 1990 time frame, hybrid and solar standalone power systems based on molten salt technology are competitive with peaking, intermediate and baseload conventional power technology. The hybrid plant consists of solar and nonsolar portions of the plant that operate in parallel. For the solar portion of the plant, molten salt is heated in cavity receivers and delivered to salt storage tanks. The hot salt is used to generate steam for the turbine in salt heat exchangers. For the nonsolar portion of the plant, molten salt is heated in a fossil-fired salt heater and delivered to the salt storage tanks. The large quantities of storage and associated heliostats result in large plant capacity factors (0.75) from the solar portion of the plant, minimize the busbar energy costs, permit nonsolar subsystems less than the plant rating and minimize the amount of fossil fuel burned. An executive summary of the selection of the preferred system configuration, conceptual design, assessment of the commercial plant, and development plan is presented. (WHK)

• Research Organization: Martin Marietta Corp., Denver, CO (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: ET-78-C-03-2234
• OSTI ID: 5146291
• Report Number(s): DOE/ET/21038-1(Vol.1)
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
FOSSIL-FUEL POWER PLANTS
HYBRID SYSTEMS
SOLAR-ASSISTED POWER SYSTEMS
DESIGN
ECONOMICS
TOWER FOCUS POWER PLANTS
COST
ELECTRIC UTILITIES
HEAT EXCHANGERS
HEAT TRANSFER FLUIDS
HELIOSTATS
MOLTEN SALTS
PERFORMANCE
SENSIBLE HEAT STORAGE
SOLAR RECEIVERS
THERMAL ENERGY STORAGE EQUIPMENT
ENERGY STORAGE
EQUIPMENT
FLUIDS
HEAT STORAGE
POWER PLANTS
POWER SYSTEMS
PUBLIC UTILITIES
SALTS
SOLAR EQUIPMENT
SOLAR POWER PLANTS
SOLAR THERMAL POWER PLANTS
STORAGE
THERMAL POWER PLANTS
140700* - Solar Thermal Power Systems