The higher use of conventional fossil fuel isresponsible for immense harm to surroundings, due to emanation of detrimentalgases and impurities in air that leads to recent global warming. These seriouschallenges encouraged engineers and scientists across the world to develop technologyin order to make use of renewable sources so as to prevent from environmentalhazards, high cost for energy production and avoid establishing new costlypower plants. The Thermal Energy Storage system (TES) is evolved sothat the solar thermal energy can be stored during peak hours of sunlight andit can be utilized during off- peak hours or during dark hours, Thermal energystorage is ineluctable for efficient use of renewable energy sources due totheir fragmentary nature, exclusively solar energy, which is the most eventualenergy source. Thermal energy storage offers a vital role in order to bond thegap between energy supply and its demand, which in turn, improves the performanceand effectiveness of the energy systems.
TEScan be categorized into sensible heat storage, latent heat storage andthermo-chemical categories of heat storage systems. Sensible Heat System (SHS)is the most common method for storing thermal energy, e.g. water is generallyused to store heat in solar heating systems and in air based heating systems,respectively. However, Latent Heat System (LHS) system is considered the most preferredtechnique for storing thermal energy due to their wide range of availability ofmaterials with higher thermal storage density and almost isothermal operation.Therefore, an effective power consumption management can be achieved by usingLHS system to store the thermal heat or coolness in off-peak loads hours anduse it during peak loads hours.In Latent heat storage system energy is engrossed orreleased in order to change the phase of external fluid with the presence ofPhase Change Material (PCM).
The phase change can be carried out forsolid-solid, solid-liquid, solid-gas or liquid-gas. The transformation ofsolid-solid has small latent heat when compared with solid-liquid transitions,while solid-gas and liquid gas have high latent heat. PCMs exhibit certaindesirable thermal, kinetic, physical, chemical and economical properties. Why we use Paraffin Wax as a PCM?Paraffin wax is a white or colorless soft solidmaterial derived from petroleum, coal and other fuels having waxy consistency.They have high molecular mass with long inline chains of hydrocarbons C31H64.There is a homogenous mixture of hydrocarbon molecules with various carbonmembers having lower melting point and poorer latent heat than pure paraffin.
Paraffin wax can be easily collaborated with LHS system due to its favorableproperties like non-corrosive in nature, safe to use, high effectiveness.PCM are able to store large amount of heat or cold atcomparatively small temperature change. PCM can therefore be applied to designheat or cold storages with high storage density, for example in domesticheating. PCM can store about 3-4 times more energy per volume as is stored assensible heat storage in solids or liquids in a temperature interval of 20?.
Heat can be supplied or extracted from a latent heat storage material withoutsignificant temperature change. PCM can therefore be applied to stabilize thetemperature in an application. .