Analysis of thermal energy storage material with change-of-phase volumetric effects

Conference · Thu Feb 01 04:00:00 EST 1990

OSTI ID:6722980

Kerslake, T W; Ibrahim, M B

NASA's Space Station Freedom proposed hybrid power system includes photovoltaic arrays with nickel hydrogen batteries for energy storage and solar dynamic collectors driving Brayton heat engines with change-of-phase Thermal Energy Storage (TES) devices. A TES device is comprised of multiple metallic, annular canisters which contain a eutectic composition LiF-CaF2 Phase Change Material (PCM) that melts at 1040 K. A moderately sophisticated LiF-CaF2 PCM computer model is being developed in three stages considering 1-D, 2-D, and 3-D canister geometries, respectively. The 1-D model results indicate that the void has a marked effect on the phase change process due to PCM displacement and dynamic void heat transfer resistance. Equally influential are the effects of different boundary conditions and liquid PCM natural convection. For the second stage, successful numerical techniques used in the 1-D phase change model are extended to a 2-D (r,z) PCM containment canister model. A prototypical PCM containment canister is analyzed and the results are discussed.

• Research Organization: National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
• OSTI ID: 6722980
• Report Number(s): N-90-21974; NASA-TM--102457; E--5244; NAS--1.15:102457; CONF-900449--
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
142000* -- Solar Energy-- Heat Storage-- (1980-)
BRAYTON CYCLE
COMPUTERIZED SIMULATION
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ENERGY STORAGE
ENERGY TRANSFER
EQUIPMENT
EUTECTICS
HEAT STORAGE
HEAT TRANSFER
MATERIALS
MATHEMATICAL MODELS
METAL-GAS BATTERIES
NICKEL-HYDROGEN BATTERIES
PHASE CHANGE MATERIALS
POWER PLANTS
SIMULATION
SOLAR CELL ARRAYS
SOLAR COLLECTORS
SOLAR EQUIPMENT
SOLAR POWER PLANTS
SOLAR THERMAL POWER PLANTS
STORAGE
THERMAL POWER PLANTS
THERMODYNAMIC CYCLES
VOLUME