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| Cogeneration
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Simultaneous production of two or more forms of useable energy from a single fuel source, e.g., heat energy and electrical or mechanical power, in the same facility. Because a typical cogeneration facility uses thermal energy which is generally vented in a traditional power plant, the process can be 50 to 70 percent more efficient. Fuels used in cogeneration facilities may take the form of natural gas, biomass, oil or coal. Most cogeneration systems are designed to simultaneously produce electric power (to be used on site or sold back to an investor-owned utility or both) and thermal heat for industrial processes or the heating and cooling of buildings. Cogeneration projects can be any size, from 10 kilowatts to 1,000 megawatts or more. |
| Cogenerator
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A class of energy producer that produces both heat and electricity from a single fuel. |
| Cognovit clause
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Loan provision where a debtor authorizes a Judgment against him in the event of a default. These agreements are not lawful everywhere. |
| Cogwheel
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Gearwheel. |
| Cohesion
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The tendency to stick together. |
| Coign (also spelled quoin)
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(1) Building cornerstone or arch keystone. (2) Building corner material, which is different from the rest of the wall, such as a block on a brick wall. (3) Masonry unit finished on both its face and end. (4) Right-angle masonry corner which projects from a wall. |
| Coil
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(1) To wind into a circular or spiral form. (2) A spiral or loop of wire or other conducting element used as an inductor, heating element, etc. (3) A helix. |
| Coil coating
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The application of a finish to a coil of metal or other material. |
| Coil spring
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Spiral of spring material. |
| Coil spring tube bender
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A flexible heavy-wire coil, which, when slipped over copper tubing, allows it to be bent without crimping. |
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