To find out the accuracy of a screw thread, it will be necessary to measure the following: Major diameter Minor diameter Effective or Pitch diameter Pitch Thread angle and form Measurement of major diameter The instruments which are used to find the major diameter are Ordinary micrometer Bench micrometer. Ordinary micrometer: The ordinary micrometer is
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Form measurement includes screw threads measurement, gear measurement, radius measurement, surface finish measurement, straightness measurement, flatness and roundness measurements. Introduction Measurement of Screw Threads Measurement of screw threads are used to transmit power and motion and also used to fasten two components with the help of nuts, bolts and studs. There is a large variety
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Image shows vertical axis wind turbine type wind machine. One of the main advantages of vertical axis rotors is that they do not have to be turned into the wind steams as the wind direction changes. Because their operation is independent of wind direction, vertical axis machines are called panemones. Vertical axis wind turbine (or
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Image shows a schematic arrangement of a horizontal axis wind machine. Although the common wind turbine with a horizontal axis is simple in principle yet the design of a complete system, especially a large one that would produce electric power economically, is complex. It is of paramount importance that the components like rotor, transmission, generator
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The Earth is unevenly heated by the sun, such that the poles receive less energy from the sun than the equator; wind power plant along with this, dry land heats up (and cools down) more quickly than the seas do. The differential heating drives a global atmospheric convection system reaching from the Earth’s surface to
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The followings are the components of a tidal power plants. The dam to form the pool or basin. Sluice ways from the basins to the sea. The power house. Dam – The function of dam is to form a barrier between the sea and the basin. Sluice ways – These are used to fill the
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Ocean Thermal Energy Conversion (OTEC) Plants convert thermal energy from Ocean water to electrical power. OTEC cogeneration plants deliver electrical energy and fresh water. The unit size of turbine generators is in the range of 10MW to 50MW. The plant ratings are of 50MW and 100 MW. Ocean Thermal Energy Conversion technologies are costly and
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Parabolic trough This type of collector is generally, used in solar power plants. A trough shaped parabolic. reflector is used to concentrate sunlight on an insulated tube (Dewar tube) or heat pipe, placed at the focal point, containing coolant which transfers heat from the collectors to the boilers in the power station. Parabolic dish It
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Flat plate and evacuated tube types of solar collectors are typically used to collect heat for space heating or domestic hot water. A flat plate is the most common type of solar thermal collector, and is usually used as a solar hot water panel to generate solar hot water. A weatherproofed, insulated box containing a
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Working of Open Cycle Gas Turbine The most basic gas turbine unit is one operating on the open cycle in which a rotary compressor and a turbine are mounted on a common shaft as image. Air is draw from the atmosphere into the compressor and compressed to pressure of 300 to 400kN/m². The compressed air
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