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18-552: [REDACTED] Look up Dx  or dx in Wiktionary, the free dictionary. DX may refer to: In arts and entertainment [ edit ] DX (album) , a 2013 album by Friendzone D-Generation X , a professional wrestling stable D-Generation X: In Your House , 1997 pro wrestling PPV Design Exchange , a museum of design in Toronto Deus Ex ,

36-940: A class of locomotives of the London and North Western Railway Fokker D.X , a 1918 Dutch fighter aircraft New Zealand DX class locomotive , operated by KiwiRail Other uses in science, technology, and mathematics [ edit ] dx , in calculus, a differential in Leibniz's notation of a variable x Direct exchange (DX), direct exchange geothermal heat pump , an energy-efficiency environmental control cooling technology Yamaha DX Series , FM synthesizers produced by Yamaha Corporation Other uses [ edit ] 510 , in Roman numerals DX, an emoticon; see List of emoticons DX as an abbreviation for "deluxe," often used in video game titles, i.e. Tetris DX , Mario Kart Arcade GP DX , Sonic Adventure DX Delta Chi ,

54-509: A former American petroleum company, now part of Sunoco In science, technology, and mathematics [ edit ] Biology and medicine [ edit ] Diagnosis , Dx or D x in medical shorthand DX (Double crossover) molecule or motif, in DNA nanotechnology Digital radiography , in the DICOM standard Computing and telecommunications [ edit ] Developer experience

72-408: A minority of future systems would use DX technology. Direct exchange heat pumps are closed-loop geothermal systems which rely on (¼” to 1-1/8”) copper pipes to exchange heat with the earth. The copper pipes are placed in the ground and form a ground loop – sometimes also referred to as earth loop or refrigerant loop – where the circulating refrigerant undergoes phase transition by exchanging heat with

90-425: A protective film on its surface which remains intact under most soil conditions. In anticipation of particularly corrosive soils, DX systems come with a Cathodic Protection system. The principle is to protect the metal surface from corrosion by making it the cathode of an electrochemical cell. In that process, the metal –copper – is connected to a sacrificial metal which will corrode in its place. Corrosion of metals

108-561: A series of video games Deus Ex (video game) , the first game in the series Pretty Cure All Stars DX: Everyone's Friends - the Collection of Miracles! , a 2009 anime film Businesses [ edit ] Danish Air Transport (IATA code) DX Group , a British mail courier and logistics company Dynex Capital Inc, listed on the New York Stock Exchange , ticker symbol DX Sunray DX Oil Company ,

126-427: A social fraternity Deluxe (disambiguation) Dx (digraph) , in linguistics U.S. Dollar Index , abbreviated USDX See also [ edit ] D10 (disambiguation) DX1 (disambiguation) DX2 (disambiguation) Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title DX . If an internal link led you here, you may wish to change

144-439: Is an excellent ground heat exchanger material and easy to manufacture. Copper tubing is strong and ductile; resistant to corrosion; has a very high thermal conductivity; and is available in many different diameters and in long coil lengths. Copper connections can be brazed, the tubing may be bent, and copper tubing is economically available. In addition, copper has a long history of use in air conditioning and refrigeration , and

162-675: Is an electrochemical process of deterioration that results from a loss of electrons as they react with water and/or oxygen. As the current flows from the Earth Loop Protection system, the metal surface to be protected is given in a uniform negative electrical potential that precludes corrosion of the ground loops, even in hostile environments. The ground loop system may be installed in several different configurations. The three most common configurations are: Diagonal and Vertical configurations typically require drilling and grouting to be installed in drilled bore holes. Grout reseals

180-402: Is the material of choice for potable water for water lines buried underground and in buildings. Copper has been used since antiquity in architectural constructions because it is a noble metal – one of a few that can be found naturally in the ground. This makes it a durable, weatherproof and corrosion-resistant material with an indefinite lifetime in most soils. Although copper is extracted from

198-872: The DX designs is that high efficiencies can be reached using a shorter and smaller amount of buried tubing thereby reducing both the footprint and installation cost. The technology has many different others names and designations: The first geothermal heat pump was a DX system built in the late 1940s by Robert C. Webber. It used Freon gas and buried copper tubing, for increased efficiency. Later geothermal heat pumps designs started incorporating an additional plastic pipe loop to circulate water in deep wells in an effort to gather sufficient heat for large industrial applications, such as cement plants. Thus water-source technology advanced due to industrial interest while DX, more suited for residential and light commercial projects such as small businesses and private homes, lagged behind. While

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216-479: The experience of using a product or service from a developer's perspective Dx , an abbreviation used in relation to the DOCSIS telecommunications standard DirectX , an application programming interface collection Double word eXternal , in the context of 386DX and 486DX CPUs DXing , in amateur and public radio DX register , a 16-bit general-purpose X86 processor register Digital transformation ,

234-461: The ground itself and is a noble metal – and is therefore almost completely impervious to corrosion from soils found worldwide – it might still undergo some corrosion in abnormally aggressive soils. It generally requires an oxidizing environment to start corrosion, and most soils are reducing, thus they contribute electrons to the copper and protect it against corrosion. In those areas where corrosive conditions may exist, copper will then naturally form

252-403: The ground: in heating mode it absorbs heat and changes from liquid to gas (evaporation), while in cooling mode it gives heat off and changes from gas to liquid (condensing). Direct exchange systems are rather simple refrigerant-based systems and operate without requiring anti-freezing agents, system flushing, circulating pump, water well drilling or plumbing. Direct exchange geothermal systems are

270-435: The least invasive geothermal systems and feature small earth loop size. Because of that, they can be installed in relatively small areas and in relatively shallow soil – typical loop depth does not exceed 100 linear feet. The compactness of the earth loop systems, which require less drilling and smaller borehole, makes up for a simpler system that is cheaper and quicker to install. Direct exchange systems use copper because it

288-561: The link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=DX&oldid=1258488608 " Category : Disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages Dx">Dx The requested page title contains unsupported characters : ">". Return to Main Page . Direct exchange geothermal heat pump The simplicity of

306-412: The technology was expanding in the 80s and 90s, several of the early manufacturers faced issues with the refrigerant and oil management system. In the past, some DX geothermal manufactures designed their equipment similar to an ordinary heat pump being sold on the market today. Some of these older DX geothermal designs worked great while others experienced oil return issues . In 2016 it was suggested only

324-416: The use of new digital technology in problem-solving applications Photography [ edit ] DX encoding , a standard marking for 35 mm and APS film cartridges Nikon DX format , a sensor/lens format for Nikon cameras Vehicles [ edit ] Albatros D.X , a 1918 German prototype single-seat fighter biplane Bavarian D X , an 1890 German saturated steam locomotive model DX,

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