Phase-change material for spacecraft thermal management. Interim report, 15 March 1987-31 March 1988
Heat-transfer problems involving phase change are encountered extensively in technical and natural processes. Latent heat storage, which possess the advantages of high density of energy and isothermal behavior during charging and discharging, is one application of using phase-change material (PCM). A computational model is presented for the prediction of the heat transfer between a heat-transfer fluid (HTF) and PCM of latent heat storage unit. Two models of flow, hydrodynamically fully developed flow and developing flow, of the HTF were proposed in this study. A two-dimensional enthalpy method was used for the computation of the phase-change heat transfer in the PCM. A fully implicit finite-difference scheme was used for the calculation of convective heat transfer in the HTF. The unknown time dependent boundary condition between the HTF and the PCM was found iteratively. The predictions are substantiated by their fair agreement with experimental data. Factors that affect the heat transfer rates between the HTF and the PCM were studied numerically for both hydrodynamically fully developed flow and developing flow. It is found that the Nusselt number is significantly increased by the developing temperature profiles.
- Research Organization:
- Missouri Univ., Rolla, MO (USA). Dept. of Mechanical and Aerospace Engineering
- OSTI ID:
- 5315647
- Report Number(s):
- AD-A-211404/9/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
250600* -- Energy Storage-- Thermal
CONTROL
CONVECTION
DATA
DOCUMENT TYPES
ENERGY STORAGE
ENERGY TRANSFER
ENTHALPY
EXPERIMENTAL DATA
FINITE DIFFERENCE METHOD
FLOW MODELS
FLUIDS
HEAT STORAGE
HEAT TRANSFER
HEAT TRANSFER FLUIDS
INFORMATION
ITERATIVE METHODS
LATENT HEAT STORAGE
MASS TRANSFER
MATERIALS
MATHEMATICAL MODELS
NUMERICAL DATA
NUMERICAL SOLUTION
PHASE CHANGE MATERIALS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PROGRESS REPORT
SPACE VEHICLES
STORAGE
TEMPERATURE CONTROL
THERMODYNAMIC PROPERTIES
TIME DEPENDENCE
VEHICLES