Document Type : Research Paper
Authors
1
Associate Professor, Department of Mechanical Engineering, Faculty of Technology and Engineering, Imam Hossein University (AS), Tehran, Iran
2
PHD, Department of Energy Conversion, Faculty of Civil Engineering, Water and Energy, Imam Hossein University, Tehran, Iran
3
Master's student, Department of Energy Conversion, Faculty of Civil Engineering, Water and Energy, Imam Hossein University, Tehran, Iran
Abstract
In the oil, gas, refining, and petrochemical industries, lubricants play a crucial role in reducing friction and wear between moving parts. Friction and wear not only decrease the lifespan of equipment but also significantly increase maintenance and repair costs. To enhance the performance of lubricants and reduce these costs, various additives are used, among which nano-additives, particularly carbon nanotubes, hold a special place. Carbon nanotubes are cylindrical structures made of carbon with nanometric diameters, which can exist as single-walled or multi-walled. These nano-additives offer numerous advantages, including increased resistance to corrosion and friction, reduced operational temperatures, and improved overall lubricant performance. This study investigates the effect of carbon nanotubes as additives in lubricants and compares them with conventional lubricants. Additionally, the performance of heat pumps operating on compression or absorption refrigeration cycles and utilizing various energy sources such as natural gas, electricity, and renewable energy is analyzed. The findings of this research indicate that nano-lubricants containing carbon nanotubes can serve as an efficient and cost-effective alternative to conventional lubricants in various industries and significantly enhance the performance of thermal systems. This not only leads to increased productivity and reduced costs but also represents a significant step toward the development of advanced technologies in energy-intensive industries.
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