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ICTAMDMES'20 IOP Publishing IOP Conf. Series: Materials Science and Engineering 923 (2020) 012066 doi:10.1088/1757-899X/923/1/012066 1. Introduction Energy storage is a major issue to be faced to allow intermittent energy supply, typically renewable sources, to match energy supply with demand. Most of Technologist are facing a problem in storing the thermal energy. It cannot be economical used if we store in batteries and so it should be stored in the appropriate form with suitable procedure. Xiang Lu et al. conducted an experiment on Nano sheets for thermal energy storage using polyurethane phase change materials in which he proposed energy storage is a major issue to be faced to allow intermittent energy supply, typically renewable sources, to match energy supply with demand is Thermal energy [1]. H. Wei et al. done a study on shell composite phase change materials for high temperature thermal energy storage, he said that it was reported that the 80% of utilization of energy is in the form thermal energy and 45% of energy is wasted. Most of Technologist is facing a problem in storing the thermal energy. It cannot be economical used if we store in batteries and so it should be stored in the appropriate form with suitable procedure. In many regions of the world, direct solar radiation is considered to be one of the most prospective sources of energy. The major disadvantages of solar energy are its intermittent supply. To overcome this drawback, it is necessary to develop energy storage devices [2]. Chuanfei Shen et al proposed that most of the experiments carried out in this issue results in 11.18%-36.17%. They used molten salts and phase change materials generally. The molten salts like Sodium sulphate dehydrate, sodium chloride, chlorides, silicates and other inorganic salts [4]. Vivek Tiwari et al. has done a SWOT analyses of high –temperature phase change materials for thermal energy storage, he says that the thermal energy storage is classified into two types. They are • Latent heat thermal energy storage (LHTES) • Sensible heat thermal energy storage (SHTES) N.Nallusamy et al. has done an Experimental investigation on a combined sensible and latent heat storage system integrated with constant/varying (solar) heat sources which resulted that the Latent thermal storage materials are very effective. They store 5 to 14 times more heat per unit volume than sensible heat storage materials such as water, masonry, or rock. Phase change materials (PCMs) absorb and emit heat energy whenever supply energy is surplus and not able to meet the demand. This may be major reason to suggest PCM as an alternative to conventional storage mediums. Thermal gradients during charging and discharging are small and hence simultaneous charging and discharging is possible with appropriate selection of heat exchanger [6]. Samira Golestani Ranjbar et al. has done a study on Fabrication and Characterization of phase change material –SiO2 for Thermal energy storage in buildings they proposed that there are some basic qualities to be seen while selecting the phase change material as storage medium which includes the specific heat capacity, thermal and chemical stability, non-toxic, non-flammable and phase transition temperature should be practically and economically attained. The main aim is to store and use the thermal energy efficiently [7]. There is variety of phase change materials can be used but the PCM which is economically beneficial is paraffin. The paraffin has a phase transition temperature near to the normal temperature 20° to 30°C. Other PCM’s are having higher range of about 350°C-1500°C which is not economically beneficial to store the thermal energy. 2PDF Image | Thermal Energy Storage using Paraffin Wax Phase Change Materials
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