Performance of direct contact latent heat storage unit

The performance of direct contact latent heat storage unit has been investigated in a glass column having an inside diameter and length of 0.2 m and 1.5 m respectively. Kerosene, as a heat transfer fluid, was bubbled through the continuous phase which was a solution of one of the hydrated salts: Na...

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Bibliographic Details
Published in:Solar energy 1989, Vol.43 (4), p.237-251
Main Authors: Farid, Mohammed, Yacoub, Kassim
Format: Article
Language:English
Subjects:
142000 - Solar Energy- Heat Storage- (1980-)
ALMACENAMIENTO
Applied sciences
CALOR
CHALEUR
continuous phase temperature
DESEMPENO
DESIGN
ECHANGE THERMIQUE
EFFICIENCY
ENERGIA SOLAR
ENERGIE SOLAIRE
Energy
ENERGY STORAGE
ENERGY TRANSFER
Energy. Thermal use of fuels
Exact sciences and technology
FLUIDE
FLUIDOS
FLUIDS
FUELS
HEAT
HEAT STORAGE
HEAT TRANSFER
KEROSENE
LATENT HEAT STORAGE
LIQUID FUELS
MACHINE
MACHINERY
MAQUINARIA
MATERIALS
MEASUREMENT
MEDICION
MESURE
MODELE
MODELOS
PARAFFIN
PARAFFINE
PARAFINAS
PETROLEUM PRODUCTS
PHASE CHANGE MATERIALS
power input
power output
SOLAR ENERGY
STOCKAGE
STORAGE
TEMPERATURA
TEMPERATURE
THERMAL EFFICIENCY
THERMAL ENERGY STORAGE EQUIPMENT
TRANSFERENCIA TERMICA
Transport and storage of energy
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Summary:The performance of direct contact latent heat storage unit has been investigated in a glass column having an inside diameter and length of 0.2 m and 1.5 m respectively. Kerosene, as a heat transfer fluid, was bubbled through the continuous phase which was a solution of one of the hydrated salts: Na 2CO 3·10H 2O, Na 2SO 4·10H 2O, and Na 2HPO 4·12H 2O. The continuous phase temperature at different heights together with the kerosene inlet and outlet temperatures were measured with time during both heat charge and discharge. Theoretical prediction of the performance of the unit has been achieved employing the model for drop with internal circulation which was used to evaluate the transfer efficiency. Thermal efficiency of the unit was found to increase with the larger column. A sharp decrease in the magnitude of the heat transfer coefficient was observed soon after crystallization started. The coefficient increased significantly at higher kerosene flowrates due to the formation of smaller bubbles.
ISSN:0038-092X
1471-1257
DOI:10.1016/0038-092X(89)90023-6