Non-conventional energy is one of the clean energy resources. In this, solar energy is plentiful and contains high exergy among non-conventional energy sources. Thermal energy storage is a method of storing thermal energy by heating a storage material that may subsequently be used for heating or power generating. This study focused on the development of solar ponds for effective solar energy storage. The study depicts the heat fluctuation in a solar pond with phase change material and Nanomaterial. Paraffin wax was used as a phase change material and the performance has been investigated and compared with the addition of nanomaterials such as carbon nanotubes and silver-titanium oxide. The experiment was conducted out on the solar pond without and with phase change material, as well as with carbon nanotubes and silver-titanium oxide inclusion. The experimental results exhibit that the phase change material used to store the majority of solar energy, the temperature difference measured at night for the solar pond with nanoparticle-infused phase change material was minimal. The energy storage capacity of the solar pond increases by 7.8%, 21.8%, and 25% when it is coupled with paraffin wax, silver-titanium oxide/paraffin wax, and carbon nanotubes/paraffin wax. The average temperature variation of the solar pond was observed on the weekly basis by 3°C, 5°C, and 7.5°C when it is coupled with paraffin wax, silver-titanium oxide/paraffin wax, and carbon nanotubes /paraffin wax respectively. It is concluded that compared to simple phase change material, the silver-titanium oxide, and carbon nanotubes have better performance in the storage of thermal energy.

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In recent days, the automobile, aerospace, and marine sectors are imposed to search the similar quality alternative material with desired mechanical and wear characteristics obtained by using natural fiber extracted from environmental wastes. The current investigational characteristics study focuses to increase the mechanical properties of composite by using NaOH‐treated natural fiber like jute and sisal bonded with epoxy resin via the wet filament technique. The four different positions of fibers like the jute‐sisal fiber were dipped with epoxy resin and waved as random (multi‐directional), 0° (unidirectional), 90° (bi‐directional), and interlock position. The developed natural fiber composites were subjected to tensile, impact, and flexural strength made by ASTM procedure. The composite prepared with interlock position showed higher tensile, impact, and flexural strength 49.51 ± 1.51 MPa, 12 ± 0.98 J, and 57.31 ± 1.98 MPa respectively and improved by 12%, 33.3%, and 10% as compared to random (multi‐directional) composite. So the developed composites were enhanced by the conservation of jute/sisal fiber bonded with epoxy as interlocking distribution is utilized for lightweight applications and the conservation of waste natural fiber retained the ecosystem sustainability.

Fabrication industries are emerging to reduce and recycle waste scrap materials into useful products for various engineering applications such as domestic, structural, marine, and construction doors and windows. Most waste scrap materials are affected by soil and water pollution, resulting in unsuitable environmental living. This study is to fabricate the low‐cost and eco‐friendly Al‐ZrO2 alloy composite made with waste Al/Mg metal scrap microparticles through stir casting technique and the developed composite with 0 wt%, 5 wt%, 10 wt%, and 15 wt% of ZrO2 were studied its mechanical properties (ASTM). The synthesized composites' mechanical tensile strength, impact, and hardness were evaluated by ASTM test standard. The revealed experimental results were compared and an optimum sample was addressed. The optical micrograph studies revealed the metal particle presence. The sample 4 composite contained 15 wt% of ZrO2 particles and showed superior mechanical properties like 7.7%, 57.7%, and 13.66% improvement in tensile strength, impact toughness, and hardness compared to sample 1 without ZrO2 particles.