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Background: In the past 30–40 years, conflicts over limited conventional energy sources and the negative climate change caused by them have attracted researchers and analysts to new, clean, and green energy technologies. Thereby reducing the consumption of conventional fuel and the negative impact on the climate. The production of alternative energy in the form of thermal energy storage using phase change materials (PCMs) is one of the techniques that not only reduces the gap between the supply and demand of energy but also increases the stability of the energy supply. The tendency of PCMs to melt and solidify over a wide temperature range makes them more attractive for use in many applications. The effective and efficient storage of solar energy by PCM has the potential to significantly advance the use of renewable energy. Methods: Organic non-paraffin compound beeswax (BW) mixed with other non-paraffin compounds stearic acid (SA), Palmitic acid (PA), Myristic acid (MA), and Lauric acid (LA) in different compositions with the help of magnetic stirrer at 50–60°C for 3–4 hours to prepare BWSA, BWPA, BWMA, and BWLA eutectic PCM. Results: Prepared eutectics melt and solidify in the temperature range 36–56°C and with latent heat in the range of 155–211 kJ/Kg. Conclusions: Due to suitable temperature and good latent heat storage range, it is a good choice as thermal energy storage, for solar drying applications.

Background: Energy storage is very critical for reducing the mismatch between demand and supply thus offering better management capabilities. It reduces the peak energy demand and increases efficiency, security, and reliability. There is unavailability of low-cost phase change materials (PCMs) in the lower temperature range. Methods: This study discusses the creation of eutectic from capric acid and paraffin wax. A series of blending of capric acid/paraffin wax (CA/PW) were prepared, having variable weight-composition. The thermophysical properties were obtained using differential scanning calorimetry, Further, thermal cycle testing was done to understand the thermal stability and reliability of the prepared eutectics. Results: The area underneath the peak is used to calculate the latent heat of fusion, and the tangent of the steepest slope at the peak of the crest is used to calculate the melting temperature (T m) . Differential scanning calorimetry results showed the developed eutectic had an appropriate melting temperature and adequate latent heat of fusion of 29.86 °C - 30.60 °C and 154.15–198.62 kJ/kg respectively, and can be used for various thermal energy storage applications in buildings, solar absorption chillers, surgical dress/clinical bed, and photovoltaic systems. Conclusions: The accelerated thermal cycle of the same confirmed its thermal stability up to 500 heating and cooling cycles. It was discovered that variable heating and cooling speeds had no significant influence on the melting temperature and latent heat of fusion of PW/CA eutectics. Further, the economic study revealed that the created PCM is inexpensive and readily available in the Indian market.

Background: In the past 30–40 years, conflicts over limited conventional energy sources and the negative climate change caused by them have attracted researchers and analysts to new, clean, and green energy technologies. Thereby reducing the consumption of conventional fuel and the negative impact on the climate. The production of alternative energy in the form of thermal energy storage using phase change materials (PCMs) is one of the techniques that not only reduces the gap between the supply and demand of energy but also increases the stability of the energy supply. The tendency of PCMs to melt and solidify over a wide temperature range makes them more attractive for use in many applications. The effective and efficient storage of solar energy by PCM has the potential to significantly advance the use of renewable energy. Methods: Organic non-paraffin compound beeswax (BW) mixed with other non-paraffin compounds stearic acid (SA), Palmitic acid (PA), Myristic acid (MA), and Lauric acid (LA) in different compositions with the help of magnetic stirrer at 50–60°C for 3–4 hours to prepare BWSA, BWPA, BWMA, and BWLA eutectic PCM. Results: Prepared eutectics melt and solidify in the temperature range 36–56°C and with latent heat in the range of 155–211 kJ/Kg. Conclusions: Due to suitable temperature and good latent heat storage range, it is a good choice as thermal energy storage, for solar drying applications.