Drum shearer is the most important component of production chain in longwall mining. This machine is driven along the face by a powerful haulage system. In this paper, the reliability of haulage system of shearer has been analysed. The result showed that Time Between Failures (TBF) data of this system obeys the three-parameter Weibull distribution. On the basis of the achieved reliability model, the Preventive Maintenance (PM) scheduling has been suggested for different reliability levels. The reliability-based maintenance intervals for 90, 80, 70 and 50% reliability are 19.4, 35, 49 and 96.8 h, respectively. If 35 h are considered as the PM intervals, mean TBF will be increased by 16.2%.
- Inderscience Publishers
- Reliability-based maintenance scheduling of haulage system of ...
How Do Relays Function in Industrial Power Distribution Systems?
How Do Relays Function in Industrial Power Distribution Systems? Power distribution systems that manage large currents come with components that protect the system from abnormal conditions, which can damage the unit. One of these components is a relay, which is used to isolate, limit or control electrical loads. Relays, or simple switches that are set off or activated via an electrical current, can decrease risks associated with overheating and trips – ensuring the system remains operational with minimal...
As renewable electricity is added to the grid, are power markets misfiring?
When increasing megawatt-hours of variable solar and wind energy began coursing through the grid, the initial concern was an operational one—could grid reliability be maintained. But it turns out those megawatt-hours are creating market challenges, as well. What needs to be done to right the markets? Travis Kavulla, vice chairman of the Montana Public Service Commission, and Albert Cheung, head of analysis at Bloomberg New Energy Finance, have each taken a stab at answering that question in recent essays. I...
Nitrogen Refrigerated Trucks a New Trend? An Alternative to Diesel Powered Refrigeration
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How big is the distributed energy opportunity for water and wastewater utilities?
Energy costs for water utilities are large, and growing Energy is a significant cost for many water utilities, and costs are growing as more energy-intensive forms of water supply, including desalination, are being used. Energy is typically the second-largest utility budget item in developed countries, after labour. In many developing countries, energy can account for 70% or even more, of annual costs. But water and wastewater utilities can generate and export energy – in multiple forms. Water utilities...
Skærbækværket / Skaerbaek Power Plant 2 x 154 MW Biomass-Fired Boilers - Case study
Fredericia, DenmarkBabcocfc & Wilcox Velund (B&W Volund) designed, manufactured and commissioned two biomass boilers for the Skaerbaekvaerket power plant in Denmark. The project allows the combined heating and power plant to supply approximately 60.000 households with dean and reliable district heating and electicity while reducing CO/ emissions.Plant DescriptionThe Skaerbaek Power Plant (SKV40) is owned and operated by Orsted A/S (formerly DONG Energy Thermal Power A/S). Built in 1951, the plant originally...