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The Dyson DC41 upright released in late 2011 as the replacement for the DC25, is the first upright vacuum with Dyson's new Radial Root Cyclone technology as well as an automatic height adjuster which provides the maximum amount of power in the suction head.
Dyson Limited, d.b.a Dyson, is a Singaporean–British multinational technology company. [7] Founded in 1991 by James Dyson in Malmesbury , England, the company designs and manufactures household appliances such as vacuum cleaners , air purifiers , hand dryers , bladeless fans , heaters , hair dryers , and lights.
Piston-based engines are much more complex than turbine-powered engines, and generally have TBOs on the order of 1,200 to 2,000 hours of running time. They tend toward the lower number if they are new designs, or include boosting options such as a turbocharger . [ 3 ]
The Required NPSH (NPSH R): the head value at the suction side (e.g. the inlet of a pump) required to keep the fluid away from cavitating (provided by the manufacturer). NPSH is particularly relevant inside centrifugal pumps and turbines , which are parts of a hydraulic system that are most vulnerable to cavitation.
With the help of these equations the head developed by a pump and the head utilised by a turbine can be easily determined. As the name suggests these equations were formulated by Leonhard Euler in the eighteenth century. [1] These equations can be derived from the moment of momentum equation when applied for a pump or a turbine.
A concise history of Westinghouse jet engine development may be found in the ASME technical paper entitled "Evolution of Heavy-Duty Power Generation and Industrial Gas Turbines in the United States" [1] delivered at the ASME International Gas Turbine Conference, The Hague, June, 1994. This paper was compiled by Westinghouse engineers who had ...
The Dyson Airblade is claimed by its manufacturer to dry hands in 10 seconds and to use less electricity than conventional hand dryers. [ 1 ] The first commercially available high-speed, horizontal-wiping air dryer was the Mitsubishi Jet Towel, developed since 1991 and introduced in 1993. [ 3 ]
The Archimedean screw turbine is applied on rivers with a relatively low head (from 0.1 m to 10 m) and on low flows (0.01 m 3 /s up to around 10 m 3 /s on one turbine). Due to the construction and slow movement of the blades of the turbine, the turbine is considered to be friendly to aquatic wildlife. It is often labelled as "fish friendly".
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