The purpose of this study is to discuss the impact fatigue failure mechanism of a suction valve that involves the fracture with fragments torn off from the edge or surface. The shape and dimensions of the test specimen and stopper were made the same as those of the suction valve and stopper in an actual compressor. The specimen was operated by short-duration compressed air pulses, and struck ag...

World wind energy resources are substantial, and in many areas, such as the US and northern Europe, could in theory supply all of the electricity demand. However, the remote or challenging location (i.e. offshore) and especially the intermittent character of the wind resources present formidable barriers to utilization on the scale required by a modern industrial economy. All of these technical...

A thermochemical conversion (TCC) process was developed to convert swine manure into an oil product in a high temperature and pressure environment. The objective of this study was to examine the effects of different process gases, including CO, H2, CO2, N2, and compressed air, on the efficiencies of oil production and waste reduction, and to explore the possibility of replacing costly reducing ...

1First, two liquids (water and water with dye) are injected in the chamber and mix until a desired pressure is achieved (from 1 up to 4 atmospheres). Then, gas (compressed air) is introduced in order to decrease the density of the mixture at a given pressure. When the mixture is ready, it is heated until a desired temperature (from ambient temperature up to 150 oC), at this precise moment, a va...

The jet propulsion engine is used for the propulsion of aircraft, m issile and submarine (for vehicles operating entirely in a fluid) by the reaction of jet of gases which are discharged rearward (behind) with a high velocity. As applied to vehicles operating entirely in a fluid, a momentum is imparted to a mass of fluid in such a manner that the reaction of the imparted momentum furnishes a pr...

In this work, we examine the potential advantages of co-locating wind and energy storage to increase transmission utilization and decrease transmission costs. Co-location of wind and storage decreases transmission requirements, but also decreases the economic value of energy storage compared to locating energy storage at the load. This represents a tradeoff which we examine to estimate the tran...

disease of a man working on the river Hooghly Tunnel being constructed by Messrs. John Cochrane & Sons, Ltd., of Westminster, London, is of special interest as it is probably the first report of & deatfy from this disease in India. C. S., a Punjabi Sikh, aged 20 years, was medically examined on the 25th August, 1930, in the morning and was found fit. for work in " compressed air." He reported h...

As an important solution to issues regarding peak load and renewable energy resources on grids, large-scale compressed air energy storage (CAES) power generation technology has recently become a popular research topic in the area of large-scale industrial energy storage. At present, the combination of high-expansion ratio turbines with advanced gas turbine technology is an important breakthroug...

Detection of Low Frequency (around 40kHz) Ultrasound is a powerful method for maintenance inspection of plant and machinery. Many failure conditions give early indication by the production of ultrasound. These include pressure leaks, electrical discharge and deterioration of bearings and other machinery. Leakage of compressed air has become a particular issue recently with the promotion of ener...