Numerical modeling of dish-Stirling reflux solar receivers

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6343458

Hogan, R E

Using reflux solar receivers to collect solar energy for dish-Stirling electric power generation systems is currently being investigated by several organizations, including Sandia National Laboratories, Albuquerque, New Mexico. In support of this program, Sandia has developed two numerical models describing the energy transfer within and thermal performance of pool-boiler and heat-pipe receivers. Both models are applicable to axisymmetric geometries and they both consider the radiative and convective energy transfer within the receiver cavity, the conductive and convective energy transfer within the receiver cavity, the conductive and convective energy transfer from the receiver housing, and the energy transfer to the receiver working fluid. In these models, the radiative transfer within the receiver is analyzed using a two-band (solar and infrared) net-radiation formulation for enclosure radiation. Empirical convective correlations describe the convective heat transfer from the cavity to the surroundings. The primary difference between the models is the level of detail in modeling the heat conduction through the receiver walls. The more detailed model uses a two-dimensional finite control volume method, whereas the simpler model uses a one-dimensional thermal resistance approach. 20 refs., 7 figs., 2 tabs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• Sponsoring Organization: DOE/CE
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6343458
• Report Number(s): SAND-89-1628C; CONF-910318--5; ON: DE91004510
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140700* -- Solar Thermal Power Systems
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
EFFICIENCY
ENERGY
ENERGY SOURCES
ENERGY TRANSFER
ENGINES
FLUIDS
HEAT ENGINES
HEAT PIPES
HEAT TRANSFER
MATHEMATICAL MODELS
PERFORMANCE
POWER GENERATION
RENEWABLE ENERGY SOURCES
SOLAR ENERGY
SOLAR RECEIVERS
STIRLING ENGINES
THERMAL EFFICIENCY
WORKING FLUIDS