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Clarkson Thimble Tube Boiler
A thimble tube boiler is a form of steam boiler, usually provided as an auxiliary boiler or heat-recovery boiler. They are vertical in orientation and would be considered a form of water-tube boiler. Description The characteristic feature of this boiler are its 'thimble tubes'. These are short horizontal water tubes, closed at one end and tapered. They are thus similar to the field-tube boiler, which also uses single-ended closed tubes, but with important differences. The field-tube boiler uses downward-pointing vertical tubes and these also have an internal tube. This extra tube segregates the flow into a central cold downcomer and an upwelling outer flow of heated water and boiling steam. In the thimble tube, there is no such segregation and so boiling is a random process with flow back and forth along the tube. The thimble tube boiler was developed after experiments by Thomas Clarkson and is still firmly associated with the Clarkson firm as a maker. Other makers also produce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thimble Tube Boiler (BR77 Machinery Handbook)
A thimble tube boiler is a form of steam boiler, usually provided as an auxiliary boiler or heat-recovery boiler. They are vertical in orientation and would be considered a form of water-tube boiler. Description The characteristic feature of this boiler are its 'thimble tubes'. These are short horizontal water tubes, closed at one end and tapered. They are thus similar to the field-tube boiler, which also uses single-ended closed tubes, but with important differences. The field-tube boiler uses downward-pointing vertical tubes and these also have an internal tube. This extra tube segregates the flow into a central cold downcomer and an upwelling outer flow of heated water and boiling steam. In the thimble tube, there is no such segregation and so boiling is a random process with flow back and forth along the tube. The thimble tube boiler was developed after experiments by Thomas Clarkson and is still firmly associated with the Clarkson firm as a maker. Other makers also produc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deep Drawing
Deep drawing is a sheet metal forming process in which a sheet metal blank is radially drawn into a forming die by the mechanical action of a punch. It is thus a shape transformation process with material retention. The process is considered "deep" drawing when the depth of the drawn part exceeds its diameter. This is achieved by redrawing the part through a series of dies. The flange region (sheet metal in the die shoulder area) experiences a radial drawing stress and a tangential compressive stress due to the material retention property. These compressive stresses (hoop stresses) result in flange wrinkles (wrinkles of the first order). Wrinkles can be prevented by using a blank holder, the function of which is to facilitate controlled material flow into the die radius. Deep drawing presses, especially in the Aerospace and Medical industries, require unparalleled accuracy and precision. Sheet hydroforming presses do complex draw work. Bed size, tonnage, stroke, speed, and more ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coke (fuel)
Coke is a grey, hard, and porous coal-based fuel with a high carbon content and few impurities, made by heating coal or oil in the absence of air—a destructive distillation process. It is an important industrial product, used mainly in iron ore smelting, but also as a fuel in stoves and forges when air pollution is a concern. The unqualified term "coke" usually refers to the product derived from low-ash and low-sulphur bituminous coal by a process called coking. A similar product called petroleum coke, or pet coke, is obtained from crude oil in oil refineries. Coke may also be formed naturally by geologic processes.B. Kwiecińska and H. I. Petersen (2004): "Graphite, semi-graphite, natural coke, and natural char classification — ICCP system". ''International Journal of Coal Geology'', volume 57, issue 2, pages 99-116. History China Historical sources dating to the 4th century describe the production of coke in ancient China. The Chinese first used coke for heating ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commercial Motor
''Commercial Motor'' is a weekly magazine serving the road transport industry in the United Kingdom. Founded in 1905 by Edmund Dangerfield, it is notable for having been "the first journal to be devoted exclusively to the commercial vehicle engaged in the conveyance of goods or in passenger carrying". Originally named ''The Commercial Motor'', the title was shortened to ''Commercial Motor'' for the first issue of 1966. The publication is commonly referred to as 'CM' by its readers and editorial staff. ''Commercial Motor'' was initially published by Temple Press and since 2011 it has been published by Road Transport Media. Launch ''The Commercial Motor'' was launched in March 1905 by Temple Press. In the leader of the first issue it described itself as a "missionary and educative medium". For the first issue on 16 March, 20,000 copies were issued "in Britain and other countries, with the hope that the normal weekly circulation would be at least 5,000". Composition The content ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steam Wagon
A steam wagon (or steam lorry, steam waggon or steamtruck) is a steam-powered truck for carrying freight. It was the earliest form of lorry (truck) and came in two basic forms: ''overtype'' and ''undertype'', the distinction being the position of the engine relative to the boiler. Manufacturers tended to concentrate on one form or the other. Steam wagons were a widespread form of powered road traction for commercial haulage in the early part of the twentieth century, although they were a largely British phenomenon, with few manufacturers outside Great Britain. Competition from internal-combustion-powered vehicles and adverse legislation meant that few remained in commercial use beyond the Second World War. Although the majority of steam wagons have been scrapped, a significant number have been preserved in working order and may be seen in operation at steam fairs, particularly in the UK. Design features The steam wagon came in two basic forms. The ''overtype'' designs looked li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leyland Motors
Leyland Motors Limited (later known as the Leyland Motor Corporation) was a British vehicle manufacturer of lorries, buses and trolleybuses. The company diversified into car manufacturing with its acquisitions of Triumph and Rover in 1960 and 1967, respectively. It gave its name to the British Leyland Motor Corporation, formed when it merged with British Motor Holdings in 1968, to become British Leyland after being nationalised. British Leyland later changed its name to simply BL, then in 1986 to Rover Group. After the various vehicle manufacturing businesses of BL and its successors went defunct or were divested, the following marques survived: Jaguar and Land Rover, now built by Jaguar Land Rover owned by TATA Motors; MG, now built by MG Motor, and Mini, now built by BMW. The truck building operation survived largely intact as Leyland Trucks, a subsidiary of Paccar. History Beginning Leyland Motors has a long history dating from 1896, when the Sumner and Spurrier fa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Banana Boat (ship)
Banana boat is a descriptive nickname that was given to fast ships, also called banana carriers, engaged in the banana trade. They were designed to transport easily spoiled bananas rapidly from tropical growing areas to North America and Europe. They often carried passengers as well as fruit. History During the first half of the twentieth century, the refrigerated ships, such as and , engaged in the Central America to United States trade also operated as luxurious passenger vessels. Surplus naval vessels were converted in some cases in the search for speed with Standard Fruit converting four U.S. Navy destroyer hulls, without machinery, to the banana carriers ''Masaya'', ''Matagalpa'', ''Tabasco'' and ''Teapa'' in 1932. Transfers to naval service served as transports and particularly chilled stores ships such as , the United Fruit passenger and banana carrier ''Quirigua'', and the lead ship of a group that were known as the ''Mizar'' class of stores ships. Modern banana ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feedwater Heater
A feedwater heater is a power plant component used to pre-heat water delivered to a steam generating boiler. Preheating the feedwater reduces the irreversibilities involved in steam generation and therefore improves the thermodynamic efficiency of the system.Fundamentals of Steam Power by Kenneth Weston, University of Tulsa This reduces plant operating costs and also helps to avoid thermal shock to the boiler metal when the feedwater is introduced back into the steam cycle. In a steam power plant (usually modeled as a modified Rankine cycle), feedwater heaters allow the feedwater to be brought up to the saturation temperature very gradually. This minimizes the inevitable irreversibilities associated with heat transfer to the working fluid (water). See the article on the second law of thermodynamics for a fur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blowback (steam Engine)
A blowback (also blow back or blow-back) is a failure of a steam locomotive, which can be catastrophic. One type of blowback is caused when atmospheric air blows down the locomotive's chimney, causing the flow of hot gases through the boiler tubes to be reversed, with the fire itself being blown through the firehole onto the footplate, with potentially serious consequences for the crew. The risk of backdraught is higher when the locomotive enters a tunnel because of the pressure shock. Such blowbacks can be prevented by opening the blower before closing the regulator. Similar blowback can be caused by debris or other obstructions in the smokebox. In the days when steam-hauled trains were common in the United Kingdom, blowbacks occurred fairly frequently. In a 1955 report on an accident near Dunstable, the Inspector wrote: He also recommended that the British Transport Commission carry out an investigation into the causes of blowbacks. Blowbacks can also occur when a steam tub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vertical Cross-tube Boiler
A cross-tube boiler was the most common form of small vertical boiler. They were widely used, in the age of steam, as a small donkey boiler, for the independent power of winches, steam cranes etc. The boiler has the advantage of simple robust construction, in particular requiring little regular maintenance. It is relatively inefficient, which was not a serious drawback to the purposes for which it was used. However it was also of limited heating surface, thus limiting its sustained output power, compared to other boiler designs. For that reason it was rarely used when power was required continuously, such as for locomotives. However as the boiler is of relatively large internal volume relative to its power, this acts as a transient reserve of steam. Applications such as cranes only require steam intermittently, allowing the boiler to recover pressure between lifts. Construction The boiler consists of a cylindrical vertical external shell, with a large firebox inside this, f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clarkson Thumble Tube Boiler, Burner Side, Clearwell Caves
Clarkson may refer to: People *Clarkson (surname) Given name *Clarkson Nott Potter (1825–1882), American attorney and politician *Clarkson Frederick Stanfield (1793–1867), English painter Places Australia * Clarkson, Western Australia ** Clarkson railway station, a Transperth station in the suburb Canada * Clarkson, Ontario ** Clarkson GO Station, a station in the GO Transit network located in the community South Africa * Clarkson, Eastern Cape United States * Clarkson, California, a ghost town in California * Clarkson, Kentucky * Clarkson, Maryland * Clarkson, Missouri * Clarkson, Nebraska * Clarkson, New York, a town ** Clarkson (CDP), New York, a census-designated place in the town * Clarkson, Ohio * Clarkson, Oklahoma * Clarkson, Texas Education * Clarkson College, Omaha, Nebraska, US * Clarkson University, Potsdam, New York, US Business * Clarkson plc Clarkson PLC, often referred to simply as Clarksons, is a provider of shipping services, and is headquarter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auxiliary Boiler
There have been a vast number of designs of steam boiler, particularly towards the end of the 19th century when the technology was evolving rapidly. A great many of these took the names of their originators or primary manufacturers, rather than a more descriptive name. Some large manufacturers also made boilers of several types. Accordingly, it is difficult to identify their technical aspects from merely their name. This list presents these known, notable names and a brief description of their main characteristics. See also * Glossary of boiler terminology Boilers for generating steam or hot water have been designed in countless shapes, sizes and configurations. An extensive terminology has evolved to describe their common features. This glossary provides definitions for these terms. Terms which re ... A B C D E F G H I J K L M N O P R S T V W Y References *{{cite book , title=Marine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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