Phase change material energy storage system employing palmitic acid
- Birzeit Univ., West Bank (Israel)
Experimental investigation of palmitic acid as a phase change material (PCM) for energy storage has been carried out in this work. The parametric study of phase transition included transition times and temperature ranges, propagation of the solid liquid interface, as well as the heat flow rate characteristics of the employed circular tube storage system. The experimental results proved that the melting front moves in the radical as well as in the axial directions. The convection heat transfer in the liquid phase plays an important role in the melting process. And the simple conduction model doe not describe the melting process properly. The flow rate, of the heat transfer fluid in the experimented range, has insignificant effect on the transition process. The melting time can be reduced significantly by placing the tube containing the PCM in a horizontal position rather than in a vertical one. The dimensionless phase transition time is related to Stefan number by a simple correlation.
- OSTI ID:
- 5173556
- Journal Information:
- Solar Energy (Journal of Solar Energy Science and Engineering); (United States), Journal Name: Solar Energy (Journal of Solar Energy Science and Engineering); (United States) Vol. 52:2; ISSN SRENA4; ISSN 0038-092X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
140505* -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
142000 -- Solar Energy-- Heat Storage-- (1980-)
CARBOXYLIC ACIDS
ENERGY STORAGE
ENERGY TRANSFER
HEAT FLOW
HEAT TRANSFER
HEXADECANOIC ACID
MATERIALS
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
PERFORMANCE TESTING
PHASE CHANGE MATERIALS
PHASE TRANSFORMATIONS
STORAGE
TESTING