Tech Update 17/02

Patented airflow system decreases pollutants from large piston engines

A patent was recently issued to Kansas State University for a system that controls the airflow to pistons in reciprocating internal combustion engines — engines powered by pistons. The system enables large-bore, multi-cylinder engines used in trains, pipelines, backup diesel generators and other fields to run efficiently while producing lower levels of harmful emissions than they do currently.

The patent, “Active Air Control,” was issued to the Kansas State University Research Foundation, a nonprofit corporation responsible for managing technology transfer activities at the university. The patent is for research by former faculty member Kirby Chapman and doctoral graduate Diana Grauer.

The Kansas State University-developed system uses an airflow sensor to measure and control the airflow rate into each piston in real time. Algorithms adjust the airflow accordingly and equalize the rate in multiple cylinders at the same time. This reduces the levels of nitrogen oxides produced during combustion in the engine.

The air control system offers a low-cost method to control and lower the production of nitrogen oxides and helps legacy engines meet compliance with EPA 2011 regulations. The system also was designed to fit various engine systems.

Source: Science DailyImage

Advertisements

WHAT IS THE FUNCTION OF LUBRICATION?

WHAT IS THE FUNCTION OF LUBRICATION?The object of lubrication is to prevent the moving metal surfaces from coming into contact with one another.

The lubricant creates a minute film between the metal surfaces which actually float in the oil , although this layer may be only one thousandths of an inch in thickness.

No matter how smooth the metal surfaces may appear to the naked eye , but under the microscope they appear exceedingly rough , and if these surfaces rubbed against one another without that lubricating film of oil they would soon wear away.

1897855_720519344647428_718968715_n

Tech Update 12/02

1.)Explain the difference between energy line and hydraulic grade line ?

Ans: The energy line is a graphical representation of the energy at each section.Hydraulic grade line lies below the energy line by an amount equal to the velocity head at the section.

2.)What is meant by precision ?

Ana:Precision is defined as the ability of instrument to reproduce a certain set of readings within a given accuracy.

3.)On what factors the efficiency of a centrifugal pump depends ?

Ans:The efficiency of a centrifugal pump depends on size, speed and type number.

4.)State law of conservation of momentum ?

Ans:The ratio of change of momentum of a mass of fluid is equal to the vector sum of all external forces acting on it.

Tech Update 10/02

1.)Explain what you understand by the term hydrostatic paradox ?

Ans: Hydrostatic paradox is the phenomenon that the floor load of water in vessels of different shapes carrying water at same level depends only on the area of the bottom surface and not on the shape of the vessel.

2.)What are the conditions for stability of buoyant bodies ?
Ans: A floating body is stable if the center of gravity is below the metacentre. A submerged body is stable if the center of gravity is below the center of buoyancy.

3.)What do you understand by center of buoyancy ?
Ans: Center of buoyancy is the center of gravity of the displaced liquid and buoyant force acts through it.

4.)What is nonbarotropic fluid ?

Ans: Fluid such as air for which the density is not a single-valued function of the pressure (aerostatics).

Technical Update 07-02-2014

Friction-stir welding :
Friction-stir welding (FSW) is a solid-state joining process (the metal is not melted) that uses a third body tool to join two faying surfaces. Heat is generated between the tool and material which leads to a very soft region near the FSW tool. It then mechanically intermixes the two pieces of metal at the place of the join, then the softened metal (due to the elevated temperature) can be joined using mechanical pressure (which is applied by the tool), much like joining clay, or dough. It is primarily used on aluminium, and most often on extruded aluminum (non-heat treatable alloys), and on structures which need superior weld strength without a post weld heat treatment.

For more

https://www.facebook.com/enti.innovations.9
Friction-stir welding :
Friction-stir welding (FSW) is a solid-state joining process (the metal is not melted) that uses a third body tool to join two faying surfaces. Heat is generated between the tool and material which leads to a very soft region near the FSW tool. It then mechanically intermixes the two pieces of metal at the place of the join, then the softened metal (due to the elevated temperature) can be joined using mechanical pressure (which is applied by the tool), much like joining clay, or dough. It is primarily used on aluminium, and most often on extruded aluminum (non-heat treatable alloys), and on structures which need superior weld strength without a post weld heat treatment.

For more join @[362500073782692:274:Mechanical Engineers Rocks.]