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The periodic steady state for cyclic energy storage in paraffin wax
Author(s) -
Jariwala V. G.,
Mujumdar A. S.,
Weber M. E.
Publication year - 1987
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450650603
Subject(s) - paraffin wax , wax , thermal energy storage , energy storage , materials science , steady state (chemistry) , thermodynamics , latent heat , electromagnetic coil , container (type theory) , mechanics , composite material , chemistry , electrical engineering , physics , engineering , power (physics)
The thermal performance of a latent heat energy storage unit was studied experimentally at the periodic steady state generated by cyclic energy storage and recovery. The periodic steady state was obtained by alternating identical freezing periods with identical melting periods. The storage unit was a cylindrical container of commercial paraffin wax. Energy was transferred to (and from) the wax by temperature controlled water flowing through a submerged helical coil. Measurements were made of the amount of energy stored and recovered as functions of the freezing and melting times, the temperature of water and the geometry of the coil. A simple model was proposed to calculate the energy stored or recovered in the periodic steady state.