Journal of Magnetism and Magnetic Materials, Journal Year: 2024, Volume and Issue: 611, P. 172637 - 172637
Published: Nov. 2, 2024
Language: Английский
Journal of Mines Metals and Fuels, Journal Year: 2024, Volume and Issue: unknown, P. 499 - 507
Published: Aug. 19, 2024
The rising fuel demand, driven by expanding logistical infrastructure, transportation sector growth, and the need for faster transport modes, has led to significant urban sprawl vehicle emissions, posing serious threats air quality human health. Chronic exposure emissions is linked severe health issues such as lung cancer, asthma, cardio-respiratory problems, hypersensitivity, hypertension. In response, quest alternative fuels from renewable resources, particularly biodiesel, gained momentum. Biodiesel, derived waste seed oil, animal fat, vegetable presents a promising substitute traditional diesel fuel. This study investigates effects of bl enhances with up 20% Dimethyl Carbonate (DMC), an oxygenated additive, enhance ignition properties. Engine performance were assessed under standard operational conditions. Results indicated that pure biodiesel achieved maximum cylinder pressure 1.73% higher than diesel. Increasing DMC content in blend resulted 21.54% Heat Release Rate (HRR) 17.75% improvement brake thermal efficiency compared at loads. However, also increased NOx 4.2% while significantly reducing smoke, hydrocarbon (HC), carbon monoxide (CO) 32.5%, 36.36%, 35.65% respectively, load.
Language: Английский
Citations
23
Journal of Mines Metals and Fuels, Journal Year: 2024, Volume and Issue: unknown, P. 557 - 579
Published: Sept. 4, 2024
Electronic cooling is crucial for modern electronic device design, ensuring devices operate at peak performance, reliability, and longevity. This paper offers an in-depth critical review of technologies, covering both established methods recent innovations. It explores the challenges in cooling, such as effective heat dissipation, thermal management, reliability concerns. Various strategies are examined, including air liquid phase-change emerging technologies like thermoelectric two-phase immersion cooling. The also evaluates advancements materials, manufacturing processes that have transformed Additionally, it discusses impact on energy efficiency, environmental sustainability, cost-effectiveness. Finally, highlights future research directions opportunities innovation to meet increasing demands high-performance systems. findings provide valuable insights design engineers, assisting optimal IC chip placement substrate board enhance extend operational lifespan.
Language: Английский
Citations
20
Journal of Mines Metals and Fuels, Journal Year: 2025, Volume and Issue: unknown, P. 165 - 172
Published: Jan. 7, 2025
This study investigates the potential of using nanofluids, specifically those composed water and Titanium Dioxide (TiO2) nanoparticles, to enhance thermal performance a double-pipe copper heat exchanger. By incorporating varying concentrations TiO2 nanoparticles (0.1%, 0.3% 0.5%) into water, researchers aimed improve fluid's conductivity viscosity. The experimental results demonstrated that addition led significant increase in overall transfer rate. highest rate was achieved at nanoparticle concentration 0.3%, indicating an optimal balance between enhanced properties flow resistance. However, slight decrease observed 0.5%, suggesting higher may not necessarily lead further improvements. revealed substantial 23% improvement efficiency exchanger when nanofluid. enhancement is attributed improved nanofluid, which allows for more efficient hot cold fluids. In conclusion, findings this research strongly suggest TiO2/water nanofluids can significantly exchangers. carefully optimising conditions, it possible achieve gains while minimising drawbacks such as increased pressure drop. Major Findings: explored use transfer, with leading efficiency. concentrations, improving conductivity, drop, potentially offsetting benefits.
Language: Английский
Citations
3
Journal of Mines Metals and Fuels, Journal Year: 2025, Volume and Issue: unknown, P. 27 - 35
Published: Jan. 7, 2025
This research focuses on improving vehicle safety by developing a new spring-based energy absorption system for the front bumper of Bolero vehicle. The goal is to reduce severity frontal collisions absorbing significant portion impact energy. proposed comprises helical compression spring, mounting bracket, and chassis member. design aims absorb 30-35% impact, reducing deceleration rate minimizing shock transmitted passenger cabin. To visualize estimate its capabilities, 3D CAD model analytical calculations have been performed. Further analysis using finite element methods will provide more detailed understanding deformation behaviour as well capacity absorbing. Future work involve refining design, conducting analysis, evaluating performance through rigorous testing. has potential significantly enhance mitigate risks associated with collisions. Major Findings: A novel was 30-35 %. Finite conducted assess system's capacity. four-damper demonstrated 42.44% reduction in maximum compared plain bumper. safety.
Language: Английский
Citations
2
Journal of Mines Metals and Fuels, Journal Year: 2024, Volume and Issue: unknown, P. 1005 - 1012
Published: Oct. 16, 2024
This study investigated heat transfer and friction characteristics in a forced convection system using wavy twisted tape inserts with circular holes. The inserts, twist ratios (TR) of 8.5, 7.5, 6.5, were placed inside test pipe to create turbulent flow. tapes measured 700 mm length 18 width, while the had an outer diameter 35 inner 30 mm, section mm. Airflow rates adjusted achieve different bulk mean temperatures. Experimental data used develop new correlations for Nusselt number factor. Reynolds (Re) ranged from 4,000 14,000. Comparisons between varying pitches smooth tube showed that highest rate was achieved ratio 6.5.
Language: Английский
Citations
15
Journal of Mines Metals and Fuels, Journal Year: 2024, Volume and Issue: unknown, P. 1093 - 1098
Published: Oct. 30, 2024
This study numerically analyzed different substrate board materials, including FR4, silicon, and copper, for electronic component cooling. Ten diverse components were mounted on these boards subjected to uneven heat distribution. Both natural forced air cooling tested at various speeds. Copper cladding significantly lowered temperatures by 34-54 degrees Celsius compared FR4 or silicon 7 m/s. Moreover, copper allowed lower fan speeds (5 m/s) while keeping below 100 Celsius, reducing energy consumption. These results offer valuable guidance thermal engineers in selecting optimal efficient
Language: Английский
Citations
13
Journal of Mines Metals and Fuels, Journal Year: 2024, Volume and Issue: unknown, P. 1059 - 1066
Published: Oct. 30, 2024
This research presents a comprehensive numerical and experimental investigation into the influence of overlapping angles from 30° to 100° with 5° increment on mechanical strength deformation behaviour curved plates joined using arc welding process. study employs Finite Element Analysis (FEA) simulate process assess stress distribution across welded joint. The simulations complemented by trials; wherein at varying welding. Mechanical tests, including tensile bending conducted evaluate joint characteristics. results reveal significant impact angle joint's performance. Specifically, an optimal identified, which maximizes while minimizing deformation. findings contribute better understanding for offer practical guidelines optimizing design in engineering applications.
Language: Английский
Citations
7
Journal of Mines Metals and Fuels, Journal Year: 2024, Volume and Issue: unknown, P. 1319 - 1327
Published: Dec. 11, 2024
This paper aims to investigate the influence of plate thickness on strength, failure load and deformation behaviour mild steel curved plates. Experimental tests were conducted plates with varying thicknesses, subjected static loading conditions. The ultimate load, deflection modes recorded analysed. Results indicate a significant relationship between mechanical properties. Thicker exhibited higher load-carrying capacity different patterns than thinner Major Finding: findings provide valuable insights for designing optimising structures in various engineering applications.
Language: Английский
Citations
5
Journal of Mines Metals and Fuels, Journal Year: 2025, Volume and Issue: unknown, P. 419 - 427
Published: Feb. 24, 2025
This study evaluates the performance of coconut shell ash as a corrosion-controlling agent in concrete. Reinforced concrete specimens with different dosages were cast and further exposed to an accelerated corrosion process. The activity was monitored help most commonly adopted electrochemical techniques viz - half-cell potential Tafel extrapolation technique. test results indicated that adding 5% by weight cement hindered resulted decreased rate. compressive strength also enhanced compared without ash. Thus, using additive can be considered eco-friendly solution it helps resolve issue disposal agricultural waste material controls Major findings: experimental indicate incorporating Coconut Shell Ash (CSA) into effectively reduces enhances strength. As byproduct, CSA offers environmentally friendly for while mitigating
Language: Английский
Citations
0
Journal of Mines Metals and Fuels, Journal Year: 2025, Volume and Issue: unknown, P. 467 - 473
Published: Feb. 24, 2025
The rapid pace of economic growth has placed immense strain on our planet's resources. Our current reliance fossil fuels, such as oil, gas, and coal, is unsustainable poses significant environmental risks. Fortunately, a multitude renewable energy alternatives, including biomass, hydropower, wind energy, offer promising solutions. In addition to production, effective waste management crucial. surge in industrial consumer activity led dramatic increase generation, particularly plastic waste. widespread use plastics, due their versatility affordability, resulted global crisis. 2019 alone, staggering 299 million tons were produced worldwide, from previous years. Despite recycling efforts, substantial amount ends up landfills oceans, causing severe damage. It estimated that between 10 20 pollute oceans annually, leading the accumulation over 5 trillion particles. project aims address this pressing issue by developing sustainable solution convert into valuable biofuel. Through process known pyrolysis, we can extract oil diesel unsorted dirty plastic, producing product called Plastic Pyrolyzed Oil (PPO). This biofuel be sold at competitive prices, making it viable alternative traditional fuels. Both plastics petroleum-derived fuels are primarily composed hydrocarbons, them chemically similar. By harnessing power break down its constituent components clean-burning fuel. offers several advantages disposal methods, incineration. Pyrolysis non-toxic environmentally friendly, requiring minimal pre-treatment by-products. Major Findings: 1. pollution crisis: excessive production improper pose threat environment, marine ecosystems. 2. Dependence fuels: continued contributes climate change air pollution. 3. Potential plastic-derived Converting fuel through processes like pyrolysis both production.
Language: Английский
Citations
0