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Smoke Flaps
{{unreferenced, date=April 2013 Commercially, a smoke flap can take the form of a metal, tin, or other alloy and can be manipulatable by hand or lever, and appears in home chimneys, stoves or boilers. The more common use of a smoke flap is on the Native American Plains Indian tipi. Smoke flap vents Smoke flap vents are designed to allow for adequate indoor heating especially where indoor fireplaces are present, as well as to regulate steam, smoke and heat pressure output in devices such as chimneys, stoves, or boilers. Tipi smoke flap vents Smoke flap ventilation is used on tipi (teepee') housing of the Native America Plains Indians by tradition, both historically and on modern ceremonial tipis. The tipi smoke flap vent is attached in a continuous piece to the cured hides that cover the exterior of the large teepee housing structure. In the summer months the vent may remain open to a view of the night sky and to harmonize with the warm temperatures. Opening and closing the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alloy
An alloy is a mixture of chemical elements of which at least one is a metal. Unlike chemical compounds with metallic bases, an alloy will retain all the properties of a metal in the resulting material, such as electrical conductivity, ductility, opacity, and luster, but may have properties that differ from those of the pure metals, such as increased strength or hardness. In some cases, an alloy may reduce the overall cost of the material while preserving important properties. In other cases, the mixture imparts synergistic properties to the constituent metal elements such as corrosion resistance or mechanical strength. Alloys are defined by a metallic bonding character. The alloy constituents are usually measured by mass percentage for practical applications, and in atomic fraction for basic science studies. Alloys are usually classified as substitutional or interstitial alloys, depending on the atomic arrangement that forms the alloy. They can be further classified as homo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plains Indian
Plains Indians or Indigenous peoples of the Great Plains and Canadian Prairies are the Native American tribes and First Nation band governments who have historically lived on the Interior Plains (the Great Plains and Canadian Prairies) of North America. While hunting-farming cultures have lived on the Great Plains for centuries prior to European contact, the region is known for the horse cultures that flourished from the 17th century through the late 19th century. Their historic nomadism and armed resistance to domination by the government and military forces of Canada and the United States have made the Plains Indian culture groups an archetype in literature and art for Native Americans everywhere. The Plains tribes are usually divided into two broad classifications which overlap to some degree. The first group became a fully nomadic horse culture during the 18th and 19th centuries, following the vast herds of American bison, although some tribes occasionally engaged in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tipi
A tipi , often called a lodge in English, is a conical tent, historically made of animal hides or pelts, and in more recent generations of canvas, stretched on a framework of wooden poles. The word is Siouan, and in use in Dakhótiyapi, Lakȟótiyapi, and as a loanword in US and Canadian English, where it is sometimes spelled phonetically as ''teepee'' and ''tepee'' (also pronounced ). Historically, the tipi has been used by some Indigenous peoples of the Plains in the Great Plains and Canadian Prairies of North America, notably the seven tribes of the Sioux, as well as among the Iowa people, the Otoe and Pawnee, and among the Blackfeet, Crow, Assiniboines, Arapaho, and Plains Cree.Lewis H. Morgan, "I have seen it in use among seven or eight Dakota sub-tribes, among the Iowas, Otoes, and Pawnees, and among the Black-feet, Crows, Assiniboines, and Crees. In 1878, I saw it in use among the Utes of Colorado. A collection of fifty of these tents, which would accommodate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chimneys
A chimney is an architectural ventilation structure made of masonry, clay or metal that isolates hot toxic exhaust gases or smoke produced by a boiler, stove, furnace, incinerator, or fireplace from human living areas. Chimneys are typically vertical, or as near as possible to vertical, to ensure that the gases flow smoothly, drawing air into the combustion in what is known as the stack, or chimney effect. The space inside a chimney is called the '' flue''. Chimneys are adjacent to large industrial refineries, fossil fuel combustion facilities or part of buildings, steam locomotives and ships. In the United States, the term '' smokestack industry'' refers to the environmental impacts of burning fossil fuels by industrial society, including the electric industry during its earliest history. The term ''smokestack'' (colloquially, ''stack'') is also used when referring to locomotive chimneys or ship chimneys, and the term ''funnel'' can also be used. The height of a c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stoves
A stove or range is a device that burns fuel or uses electricity to generate heat inside or on top of the apparatus, to be used for general warming or cooking. It has evolved highly over time, with cast-iron and induction versions being developed. Stoves can be powered with many fuels, such as electricity, gasoline, wood, and coal. Due to concerns about air pollution, efforts have been made to improve stove design. Pellet stoves are a type of clean-burning stove. Air-tight stoves are another type that burn the wood more completely and therefore, reduce the amount of the combustion by-products. Another method of reducing air pollution is through the addition of a device to clean the exhaust gas, for example, a filter or afterburner. Research and development on safer and less emission releasing stoves is continuously evolving. Etymology The term "stove" is derived from the Old English word ''stofa'', indicating any individual enclosed space or room; "stove" may sometimes stil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boilers
A boiler is a closed vessel in which fluid (generally water) is heated. The fluid does not necessarily boil. The heated or vaporized fluid exits the boiler for use in various processes or heating applications, including water heating, central heating, boiler-based power generation, cooking, and sanitation. Heat sources In a fossil fuel power plant using a steam cycle for power generation, the primary heat source will be combustion of coal, oil, or natural gas. In some cases byproduct fuel such as the carbon monoxide rich offgasses of a coke battery can be burned to heat a boiler; biofuels such as bagasse, where economically available, can also be used. In a nuclear power plant, boilers called steam generators are heated by the heat produced by nuclear fission. Where a large volume of hot gas is available from some process, a heat recovery steam generator or recovery boiler can use the heat to produce steam, with little or no extra fuel consumed; such a configuration is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plains Indians
Plains Indians or Indigenous peoples of the Great Plains and Canadian Prairies are the Native American tribes and First Nation band governments who have historically lived on the Interior Plains (the Great Plains and Canadian Prairies) of North America. While hunting-farming cultures have lived on the Great Plains for centuries prior to European contact, the region is known for the horse cultures that flourished from the 17th century through the late 19th century. Their historic nomadism and armed resistance to domination by the government and military forces of Canada and the United States have made the Plains Indian culture groups an archetype in literature and art for Native Americans everywhere. The Plains tribes are usually divided into two broad classifications which overlap to some degree. The first group became a fully nomadic horse culture during the 18th and 19th centuries, following the vast herds of American bison, although some tribes occasionally engaged in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
