To fulfil the world's growing need for fossil fuel energy, renewable energy harvesting is required, and the rate of depletion of non-renewable energy sources must be slowed. Currently, many of these techniques are available, but with less effectiveness than before. These techniques result in a long payback period of investment. The goal of this research is to look at many elements of convective heat transfer enhancement using finned heat pipes, as well as the recovery of industrial waste heat. To validate these new energy-saving concepts, ANSYS 2020 R1 is used, including control strategies and simulation techniques. An integrated waste heat recovery system using finned heat pipes is having a significant effect on overall efficiency. The efficiency is increased by 10.5%–18.8% for various load conditions.
Cutting fluid is a vital part of the machining process. Cutting fluid is significantly applied tolower the friction and heat generated in the machining zone. It also helps in easy chip removal, protection against oxidation, tool life improvement, and an overall improvement in the quality of the product. The current industrial practices are majorly emphasized on mineral-based oil application under flood lubrication to achieve superior quality. However, these oils and techniques are toxic and environmentally unfriendly. Machining under dry or with minimum quantity lubrication (MQL) has been mostly preferred to eliminate the use of abundant oil. The current research work has established the promising potential for vegetable oils as a cutting fluid under MQL during turning of AISI 4130 steel. The results inferred that vegetable-based cutting fluids performed better over mineral-based cutting fluids in terms of lower values of machined surface roughness, tool wear, cutting forces, and chip-tool interface temperature. The MQL machining performance in terms of cutting forces, surface roughness and tool life has been observed better in comparison to machining under flood and dry cutting conditions.
For any machining process cutting tool temperature, surface roughness value of work piece, cutting forces are the performance deciding parameters. These parameters directly, indirectly affect the tool life and thus affect machine cycle time, product cost and productivity. Cutting fluids are used to improve the machining performance however its cost and environment unfriendliness raise several questions. Researchers have documented several adverse health and environment effects of cutting fluids through their work. Plenty are efforts are going on to reduce the cutting fluid costs and to minimize its harmful effect to the environment. There is urgent need to provide sustainable, low cost and productive alternative to conventional machining processes. Minimum quantity lubrication is emerging as a tool to minimize the quantity exposure to the cutting fluids. In present work, low cost minimum quantity lubrication is used to verify its performance in terms of temperature, cutting forces and surface roughness. Results are compared for dry, flood and MQL cutting. Performance of MQL is better as compared to dry and flood cutting.
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