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.

Due to the extreme sensitivity of temperature in Li‐ion batteries, thermal management is a significant issue that must be addressed. Since the battery in electric vehicles produces an enormous amount of heat, it reduces its efficiency and its performance. Currently, there is a need for electric vehicles (EVs) because conventional IC engines produce an enormous amount of pollution which affects the environment, so an electric vehicle produces a very small amount of pollution. It is now being recommended and used by many people. But the electric vehicle faces some major problems due to overheating in their battery module. Nowadays, battery temperature is regulated by a system called battery thermal management system (BTMS). Modern EVs use active and passive cooling systems. Thermal management tries to improve battery architecture for greater autonomy or quick charging. To meet future difficulties in thermal management, such as air or liquid cooling, are needed. As a result of the battery's overheating, the vehicle's performance, power, energy storage, charging, and discharging are all negatively impacted; hence, a reliable thermal management system for the battery is essential for resolving these problems. This study provides an overview of the BTMS of the future, beginning with the problems involving temperature and safety. The following is a list of the benefits and drawbacks of BTMSs, which are used to maintain acceptable temperatures for battery packs. In conclusion, an analysis of the progress made in developing temperature management systems for future batteries is presented. As a first look at potential BTMSs for locomotive applications, it has been proposed to conduct a comprehensive analysis and classification of both existing and potential battery management systems.

For a thorough investigation of the combustion, performance, and emission characteristics of coconut oil distillate biodiesel under various engine loads and a constant engine speed of 1500 rpm, a Kirloskar 4‐stroke, single‐cylinder, the air‐cooled diesel engine is used. A total of three fuel samples, such as 100% biodiesel, B20, and B30 biofuel are used respectively. There is a 5% increase in brake thermal efficiency (BTE) for biodiesel and its blends as compared to diesel. The HC, CO, and Smoke are reduced except NOx. Reduction of harmful gases is possible in biodiesel usage and its blends. It is concluded that emission reductions and alternative diesel fuel is the output of this investigation.

The impact of growth in the overall population is imposed on the continuous degradation process for environmental wastes like agricultural, industrial, food products, farming waste, etc. The improper degradation may lead to pollution and toxicity for ecological living. Based on waste management concepts, environmental wastes are reduced, reused, and recycled against environmental pollution. Most environmental wastes are recycled and used as biofuel for various energy sectors like alternative fuels. Globally, vegetable loss or wastage increased by more than 35% due to the level of retailers and consumers. The present study attempts to produce a low‐cost, reliable, environmentally emission‐free biofuel using waste vegetable resources via pyrolysis reactor arrangements. The synthesized bio‐fuel energy implemented for compression ignition engine and its performance was evaluated by single cylinder four stroke diesel engine and found higher brake power and thermal efficiency of 6.89 kW and 50.29%. Finally, the emission characteristics are assessed by an exhaust gas emission tester. CO and HC emissions showed minimum amounts like 0.021% and 47 ppm.

The implications of cooling fluids with suspended titanium dioxide nanoparticles in augmenting the heat transfer rate in the heat exchanger are discussed. The application of corrugated tubes for increasing the effectiveness of heat exchangers is studied in this work. In deionized water, the nanofluid is synthesized to get three different volume concentrations (0.25%, 0.5%, and 1%). The nanofluid's flow rate varies to 100 L/h, 150 L/h, and 200 L/h, respectively. An experiment is carried out in three corrugated tubes made of copper, with pitch values of 18, 20, and 25 mm, respectively. Optimization is carried out to determine the influence of nanofluid concentration, the mass flow rate of the nanofluids, and the corrugation pitch over the heat transfer rate. It is concluded that increasing the volume concentration of the nanoparticles in deionized water and the mass flow rate of the nanofluid enhances the heat transfer rate in the heat exchanger.