text: The phase change material should possess the following thermodynamic properties:
  * Melting temperature in the desired operating temperature range
  * High latent heat of fusion per unit volume
  * High specific heat, high density, and high thermal conductivity
  * Small volume changes on phase transformation and small vapor pressure at operating temperatures to reduce the containment problem
  * Congruent melting
  Kinetic properties
  * High nucleation rate to avoid supercooling of the liquid phase
  * High rate of crystal growth, so that the system can meet demands of heat recovery from the storage system
  Chemical properties
  * Chemical stability
  * Complete reversible freeze/melt cycle
  * No degradation after a large number of freeze/melt cycle
  * Non-corrosiveness, non-toxic, non-flammable and non-explosive materials
  Economic properties
  * Low cost
  * Availability