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The rotational energy typically comes from an engine or electric motor. They are a sub-class of dynamic axisymmetric work-absorbing turbomachinery. [1] The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or volute chamber (casing), from which it exits.
A homopolar generator is a DC electrical generator comprising an electrically conductive disc or cylinder rotating in a plane perpendicular to a uniform static magnetic field. A potential difference is created between the center of the disc and the rim (or ends of the cylinder) with an electrical polarity that depends on the direction of ...
An electric cycle engine uses electric pumps to pressurize the propellants from a low-pressure fuel tank to high-pressure combustion chamber levels, generally from 0.2 to 0.3 MPa (29 to 44 psi) to 10 to 20 MPa (1,500 to 2,900 psi). The pumps are powered by an electric motor, with electricity from a battery bank.
By the end of the war, Coleman began production of a civilian version of the Model 520, designated the Model 530, and advertised as the "G.I. pocket stove". [6] [10] The Model 530 was promoted by Coleman as the "perfect pal for hunting, fishing and camping trips" that would "slip easily into a hunting coat pocket, glove compartment of a car, or ...
In micro Pumped-storage hydroelectricity (PSH), the same pump/PAT could be used for pumping and generating phases [8] by changing rotational direction and speed. The best efficiency point in pumping usually differs from its reverse mode: [3] a variable-frequency drive coupled to the motor/generator would be needed in order to change from pumping to generating mode and to react efficiently to ...
1650: Vacuum pump: Invented by Otto von Guericke. [392] 1656: Pendulum clock: Invented by Christiaan Huygens. It was first conceptualized in 1637 by Galileo Galilei but he was unable to create a working model. [393] 1663: Friction machine: Invented by Otto von Guericke. 1668: First functional reflecting telescope constructed by Isaac Newton. [394]