Solar Heat Energy Storage in Phase Change Materials / Salt Hydrate
Phase Change Material
Microencapsulation may be defined as the process of surrounding or
enveloping one substance within another substance on a very small
scale, yielding capsules ranging from less than one micron to
several hundred microns in size. Microcapsules may be spherically
shaped, with a continuous wall surrounding the core, while others
are asymmetrically and variably shaped, with a quantity of smaller
droplets of core material embedded throughout the microcapsule.
There are almost limitless applications for microencapsulated
materials.One application increasingly utilized is the
incorporation of microencapsulated phase change materials (PCMs).
Phase change materials absorb and release heat in response to
changes in environmental temperatures. When temperatures rise, the
phase change material melts, absorbing excess heat, and feels cool.
Conversely, as temperatures fall, the PCM releases heat as it
solidifies, and feels warm. This property of microencapsulated
phase change materials can be harnessed to increase the comfort
level for users of sports equipment, military gear, bedding,
clothing, building materials, and many other consumer products.