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

Journal Article · Mon Feb 01 04:00:00 EST 1993 · Journal of Solar Energy Engineering; (United States)

DOI:https://doi.org/10.1115/1.2930019· OSTI ID:6013272

Kerslake, T W ^[1]; Ibrahim, M B ^[2]

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1. NASA-Lewis Research Center, Cleveland, OH (United States)
2. Cleveland State Univ., OH (United States)

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-CaF[sub 2] phase change material (PCM) that melts at 1,040 K. A moderately sophisticated LiF-CaF[sub 2] PCM computer model is being developed in two stages considering first one-dimensional and then two-dimensional canister geometries. One-dimensional 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 free convection. For the second stage, successful numerical techniques used in the one-dimensional phase change model are extended to a two-dimensional (r, z) PCM containment canister model. A prototypical PCM containment canister is analyzed and the results are discussed.

• OSTI ID: 6013272
• Journal Information: Journal of Solar Energy Engineering; (United States), Journal Name: Journal of Solar Energy Engineering; (United States) Vol. 115:1; ISSN JSEEDO; ISSN 0199-6231
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
142000* -- Solar Energy-- Heat Storage-- (1980-)
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM FLUORIDES
CALCIUM HALIDES
COMPUTERIZED SIMULATION
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYBRID SYSTEMS
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
LITHIUM HALIDES
MATERIALS
PHASE CHANGE MATERIALS
POWER SUPPLIES
SIMULATION
SPACECRAFT POWER SUPPLIES
THERMAL ENERGY STORAGE EQUIPMENT