Today, trompes constructed of plastic pipe are being used to provide aeration for mine drainage treatment. Often, ordinary outside air can warm the pipes enough to produce dry, cool compressed air. If the water is cool, the compressed air can be made very dry by passing it through pipes that are warmer than the water. Ĭompressed air from a trompe is at the temperature of the water, and its partial pressure of water vapor is that of the dewpoint of the water's temperature. It is now owned by TransAlta (formerly by Canadian Hydro Developers) and exists beside a modern hydroelectric plant. (However, trompes can raise the water, via siphon-effect, nearly to 70% of its initial elevation.) The Ragged Chute plant on the Montreal River near the town of Cobalt, Ontario, is a trompe and tourist attraction. Large trompes were often situated at high waterfalls so that ample head was available. The pressure of the air delivered cannot exceed the hydraulic head of the discharge pipe of the separation chamber. The air is compressed by surrounding water pressure (which increases under a column due to the discharge to atmospheric pressure). The energy of the falling water creates a partial vacuum inside the pipe that is compensated by the air from the outside atmosphere provided through inlet. The separation chamber has a compressed-air takeoff pipe, and the compressed air can be used as a power source. The compressed air rises to the top of the separation chamber (wind box). The constriction produces a lower pressure because of the venturi effect, and an external port allows air to be sucked in thus creating a constant air supply.Īs the bubbles go down the pipe they are pressurized proportionally to the hydraulic head, which is the height of the column of water in the pipe. Water rushing down the vertical pipe falls through a constriction. Sketch of a hydraulic trompe with the name of its different constituent elements. The vertical pipe or shaft goes down from higher point to a separation chamber a pipe, that is typically narrower than previous one, coming away from that chamber, allows the water to exit at a lower level, and another pipe (air-pipe) coming from the chamber allows the compressed air to exit as needed. They consist of four main parts: water-supply pipe or shaft with an air-inlet inside it, water outflow pipe, separation chamber and takeoff air-pipe. At Canadian Hydro Developers' Ragged Chute facility in New Liskeard, Ontario, water falls down a shaft 351 feet (107 m) deep and 9 ft (2.7 m) across to generate compressed air for mining equipment and ventilation. The presence of a trompe is a signature attribute of a Catalan forge, a type of bloomery furnace. Trompes were used to provide compressed air for bloomery furnaces in Catalonia and the USA. A trompe is somewhat like an airlift pump working in reverse. For more guidance, see Wikipedia:Translation.Ī trompe is a water-powered air compressor, commonly used before the advent of the electric-powered compressor.You should also add the template to the talk page.A model attribution edit summary is Content in this edit is translated from the existing French Wikipedia article at ] see its history for attribution. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation.If possible, verify the text with references provided in the foreign-language article. Do not translate text that appears unreliable or low-quality.Consider adding a topic to this template: there are already 5,669 articles in the main category, and specifying |topic= will aid in categorization.Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia.
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