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Ondol
Ondol (; , Hangul: 온돌, 溫堗, ) or gudeul (Hangul: 구들, ) in Korean traditional architecture, is underfloor heating that uses direct heat transfer from wood smoke to heat the underside of a thick masonry floor. In modern usage it refers to any type of underfloor heating, or to a hotel or a sleeping room in Korean (as opposed to Western) style. The main components of the traditional ''ondol'' are an ''agungi'' (firebox or stove) accessible from an adjoining room (typically kitchen or master bedroom), a raised masonry floor underlain by horizontal smoke passages, and a vertical, freestanding chimney on the opposite exterior wall providing a draft. The heated floor, supported by stone piers or baffles to distribute the smoke, is covered by stone slabs, clay and an impervious layer such as oiled paper. History Origin Use of the ''ondol'' has been found at archaeological sites in present-day North Korea. A Neolithic Age archaeological site, circa 5000 BC, discovered in Unggi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ondol
Ondol (; , Hangul: 온돌, 溫堗, ) or gudeul (Hangul: 구들, ) in Korean traditional architecture, is underfloor heating that uses direct heat transfer from wood smoke to heat the underside of a thick masonry floor. In modern usage it refers to any type of underfloor heating, or to a hotel or a sleeping room in Korean (as opposed to Western) style. The main components of the traditional ''ondol'' are an ''agungi'' (firebox or stove) accessible from an adjoining room (typically kitchen or master bedroom), a raised masonry floor underlain by horizontal smoke passages, and a vertical, freestanding chimney on the opposite exterior wall providing a draft. The heated floor, supported by stone piers or baffles to distribute the smoke, is covered by stone slabs, clay and an impervious layer such as oiled paper. History Origin Use of the ''ondol'' has been found at archaeological sites in present-day North Korea. A Neolithic Age archaeological site, circa 5000 BC, discovered in Unggi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underfloor Heating
Underfloor heating and cooling is a form of central heating and cooling that achieves indoor climate control for thermal comfort using hydronic or electrical heating elements embedded in a floor. Heating is achieved by conduction, radiation and convection. Use of underfloor heating dates back to the Neoglacial and Neolithic periods. History Underfloor heating has a long history back into the Neoglacial and Neolithic periods. Archeological digs in Asia and the Aleutian islands of Alaska reveal how the inhabitants drafted smoke from fires through stone covered trenches which were excavated in the floors of their subterranean dwellings. The hot smoke heated the floor stones and the heat then radiated into the living spaces. These early forms have evolved into modern systems using fluid filled pipes or electrical cables and mats. Below is a chronological overview of under floor heating from around the world. Description Modern underfloor heating systems use either electrical r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underfloor Heating
Underfloor heating and cooling is a form of central heating and cooling that achieves indoor climate control for thermal comfort using hydronic or electrical heating elements embedded in a floor. Heating is achieved by conduction, radiation and convection. Use of underfloor heating dates back to the Neoglacial and Neolithic periods. History Underfloor heating has a long history back into the Neoglacial and Neolithic periods. Archeological digs in Asia and the Aleutian islands of Alaska reveal how the inhabitants drafted smoke from fires through stone covered trenches which were excavated in the floors of their subterranean dwellings. The hot smoke heated the floor stones and the heat then radiated into the living spaces. These early forms have evolved into modern systems using fluid filled pipes or electrical cables and mats. Below is a chronological overview of under floor heating from around the world. Description Modern underfloor heating systems use either electrical r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heating
A central heating system provides warmth to a number of spaces within a building from one main source of heat. It is a component of heating, ventilation, and air conditioning (short: HVAC) systems, which can both cool and warm interior spaces. A central heating system has a furnace that converts fuel or electricity to heat. The heat is circulated through the building either by fans forcing heated air through ducts, circulation of low-pressure steam to radiators in each heated room, or pumps that circulate hot water through room radiators. Primary energy sources may be fuels like coal or wood, oil, kerosene, natural gas, or electricity. Compared with systems such as fireplaces and wood stoves, a central heating plant offers improved uniformity of temperature control over a building, usually including automatic control of the furnace. Large homes or buildings may be divided into individually controllable zones with their own temperature controls. Automatic fuel (and sometimes ash ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agungi
An ''agungi'' ( ko, 아궁이) is a firebox found in traditional Korean kitchens which is used to burn firewood or other fuel for cooking. It is also a part of the traditional floor heating system, or ondol. The flat cooktop counter or hearth installed over the ''agungi'' is called a ''buttumak'' (). History Early ''buttumak'' have been dated to the 10th‒4th century BCE. Iron and ceramic ''buttumaks'', similar to their later forms, were excavated from Goguryeo 1st century BCE historical sites, such as Anak Tomb No. 3. Many Korean agrarian kitchens had ''buttumak'' with charcoal-fueled ''agungi'' until the early 1970s. File:Goguryeo buttumak 1.jpg, Iron ''buttumak'' from Goguryeo (37 BCE ‒ 668 CE) File:Agungi door 1.jpg, ''Agungi'' door from agrarian South Korea in the mid-20th century Structure ''Buttumaks'' in agrarian Korean kitchens were commonly made from brick or stone and then smoothed with clay. Above each ''agungi'' is an upward opening where ''gamasot'' (bi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypocaust
A hypocaust ( la, hypocaustum) is a system of central heating in a building that produces and circulates hot air below the floor of a room, and may also warm the walls with a series of pipes through which the hot air passes. This air can warm the upper floors as well. The word derives from the Ancient Greek meaning "under" and , meaning "burnt" (as in ''caustic''). The earliest reference to such a system suggests that the temple of Ephesus in 350 BC was heated in this manner, although Vitruvius attributes its invention to Sergius Orata in c. 80 BC. Its invention improved the hygiene and living conditions of citizens, and was a forerunner of modern central heating. Roman operation Hypocausts were used for heating hot baths and other public buildings in Ancient Rome. They were also used in private homes. It was a must for the villas of the wealthier merchant class throughout the Roman Empire. The ruins of Roman hypocausts have been found throughout Europe (for example in Ital ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kang Bed-stove
The ''kang'' (; Manchu: ''nahan'', kk, кән) is a traditional heated platform, 2 metres or more long, used for general living, working, entertaining and sleeping in the northern part of China, where the winter climate is cold. It is made of bricks or other forms of fired clay and more recently of concrete in some locations. The word ''kang'' means "to dry". Its interior cavity, leading to an often-convoluted flue system, channels the hot exhaust from a firewood/coal fireplace, usually the cooking fire from an adjacent room that serves as a kitchen, sometimes from a stove set below floor level. This allows a longer contact time between the exhaust (which still contains much heat from the combustion source) and (indirectly) the inside of the room, hence more heat transfer/recycling back into the room, effectively making it a ducted heating system similar to the Roman hypocaust. A separate stove may be used to control the amount of smoke circulating through the ''kang'', ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Culture Of Korea
The traditional culture of Korea is the shared cultural and historical heritage of Korea and southern Manchuria before the division of Korea in 1945. Manchuria refers to the ancient geographical and historical region in Northeast Asia, including countries like China and Russia. Since the mid-20th century, Korea has been split between the North Korean and South Korean states, resulting in a number of cultural differences that can be observed even today. the practice of Confucianism and Korean shamanism is deeply rooted in Korean culture. Clothing The traditional dress known as ''hanbok'' (한복, 韓服) (known as ''joseonot'' 선옷in the DPRK). The ''hanbok'' consists of a shirt (''jeogori'') and a skirt (''chima''). According to social status, Koreans used to dress differently, making clothing an important mark of social rank. Costumes were worn by the ruling class and the royal family. These upper classes also used jewelry to distance themselves from the ordinar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Korean Architecture
Korean architecture () refers to an architectural style that developed over centuries in Korea. Throughout the history of Korea, various kingdoms and royal dynasties have developed a unique style of architecture with influences from Buddhism and Korean Confucianism. Just like in the case of other Korean arts, Korean architecture is distinguished by its naturalistic tendencies, simplicity, economy of shape, and avoidance of extremes. General characteristics In Korean architecture, buildings are structured vertically and horizontally. A construction usually rises from a stone subfoundation to a curved roof covered with tiles, held by a console structure and supported on posts; walls are made of earth (adobe) or are sometimes totally composed of movable wooden doors. Architecture is built according to the kan unit, the distance between two posts (about 3.7 meters), and is designed so that there is always a transitional space between the "inside" and the "outside." The console, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Korean Culture
The traditional culture of Korea is the shared cultural and historical heritage of Korea and southern Manchuria before the division of Korea in 1945. Manchuria refers to the ancient geographical and historical region in Northeast Asia, including countries like China and Russia. Since the mid-20th century, Korea has been split between the North Korean and South Korean states, resulting in a number of cultural differences that can be observed even today. the practice of Confucianism and Korean shamanism is deeply rooted in Korean culture. Clothing The traditional dress known as ''hanbok'' (한복, 韓服) (known as ''joseonot'' 선옷in the DPRK). The ''hanbok'' consists of a shirt (''jeogori'') and a skirt (''chima''). According to social status, Koreans used to dress differently, making clothing an important mark of social rank. Costumes were worn by the ruling class and the royal family. These upper classes also used jewelry to distance themselves from the ordinar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stove
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 still ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heat Transfer
Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy (heat) between physical systems. Heat transfer is classified into various mechanisms, such as thermal conduction, Convection (heat transfer), thermal convection, thermal radiation, and transfer of energy by phase changes. Engineers also consider the transfer of mass of differing chemical species (mass transfer in the form of advection), either cold or hot, to achieve heat transfer. While these mechanisms have distinct characteristics, they often occur simultaneously in the same system. Heat conduction, also called diffusion, is the direct microscopic exchanges of kinetic energy of particles (such as molecules) or quasiparticles (such as lattice waves) through the boundary between two systems. When an object is at a different temperature from another body or its surroundings, heat flows so that the body and the surroundings reach the same temperature, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
