Solar thermal energy storage on PCM based integrated saw tooth collector for institutions

The research work done is related to solar thermal energy storage using Saw tooth shaped absorber along with Phase Change Material (PCM) with integrated collector-saw tooth solar water heating (ICSTSWH) system. Towards that Design and fabricated ICSTSWH. Solar heat gain has been enhanced by means of saw tooth shape roof which have maximum transmissivity to collect the solar irradiation. Top layer is made up of a double layer glass glazing where heat transfer analysis is done for different mediums like hydrogen, oxygen and vacuum gas. Storage tank is completely insulated except saw tooth portion. The bottom portion of the glass is coated with black color for making the absorbance co-efficient close to one. 20 aluminum pipes of 1mm thick are fixed in parallel and filled with Paraffin wax [C12] which stores the thermal energy in the form of latent heat. The PCM material gets charged when there is available of solar radiation and discharges whenever the source is not there. The trapezoidal shape solar thermal energy storage system provides energy saving which depends predominately on the amount of thermal stratification within the saw tooth storage cavity. This design brings on thermal stratification in the water storage, and provides enough energy storage to meet the hot water requirements between 6 am to 8 am (early morning) in institution's hostels.