Latent Heat Storage (Storage in Phase Change Materials PCM)

                       In this class of storehouse, energy is stored by virtue of idle heat of change of phase of the storehouse medium. Phase change accoutrements have vastly advanced thermal energy storehouse consistence as compared to sensible heat storehouse accoutrements and are suitable to absorb or release large amounts of energy at a constant temperature. thus, these systems are more compact but more precious than sensible heat storehouse systems

Different phase that can do are

• solid-solid

• solid- gas 

• solid-liquid 

• liquid- gas

Solid----> Liquid (Waterless  result of anhydrous  swab)  

One problem with  utmost  swab hydrates is that the released water of crystallization isn't sufficient to dissolve all the solid phase present. Due to  viscosity difference, the anhydrous  swab settles down at the bottom of the  vessel. This incongruent melting makes the process  unrecoverable since the anhydrous swab at the bottom is unfit to find water for recrystallization to the original hydrate. The recrystallization of an incongruently melting  swab can be achieved either by(i) the use of suspense media or thickening agent or by(ii) mechanical means(vibration, shifting, etc.) Other implicit phase change accoutrements   piecemeal from  swab hydrates are paraffin's(e.g. C18 H38,etc., alkanes containing 14 to 40 C-tittles) and non-paraffin organic accoutrements (e.g. esters, adipose acids, alcohols and glycols), which are suitable at certain situations.