Ground coupling: Using the great heat store beneath our feet.The ground is thermally stable and massive. Its temperature is higher than the air in the winter and lower in the summer, making it a potential source for heating and cooling. It can also be used to store heat. Managing the flow of heat in and out of the ground allows one to store it at one time and release it at another. The period of the heating and cooling cycles can be a combination of daily, weekly, monthly or seasonal time frames. The challenge is to exchange heat with the ground in an economic manner. RELATED ARTICLE: Snape Maltings Snape Maltings is part of Snape, Suffolk, U.K., best known for its concert hall, which is one of the main sites of the annual Aldeburgh Festival. The Maltings is a set of buildings, mostly dating from the 19th century, built on the banks of the River Ore in Snape, Suffolk, , Suffolk The Maltings concert hail is on low sandy ground near the sea. Water, extracted from the ground at a fairly constant 11 degrees Celsius, is used to cool the air in the auditorium auditorium Portion of a theater or hall where an audience sits, as distinct from the stage. The auditorium originated in the theaters of ancient Greece, as a semicircular seating area cut into a hillside. and is returned via a soakaway. The natural gradient gradient In mathematics, a differential operator applied to a three-dimensional vector-valued function to yield a vector whose three components are the partial derivatives of the function with respect to its three variables. The symbol for gradient is ∇. of the water table creates a background flow to prevent the warm water getting back to the extraction well. St George's Mews, London. This building is on clay with very little ground water movement. The flow of heat through the clay is purely by conduction conduction, transfer of heat or electricity through a substance, resulting from a difference in temperature between different parts of the substance, in the case of heat, or from a difference in electric potential, in the case of electricity. , which is a slow and highly time dependent process. Pipes cast into the piles piles: see hemorrhoids. (a) transfer heat to the surrounding ground. The movement and storage of heat into and out of the ground is actively managed by directing water flow through the pipes at different times. The building is heated and cooled with a heatpump that uses the piles as a heat source or sink. In the winter heat is extracted from the ground and it cools, When available, heat from the sun is collected from pipes bonded to the metal roof (b) and fed straight into the low temperature side of the heatpump system, to reduce the heat needed from the ground. In the summer, solar heat from the roof is used to warm the piles. In hot weather the heat pump heat pump: see air conditioning. heat pump Device for transferring heat from a substance or space at one temperature to another at a higher temperature. is used to cool the building with the waste heat being rejected into the piles, If the piles are being overcharged with heat over a daily, weekly or monthly period, the coils on the roof are not used to gather heat in the day but to reject it at night. Pipe coils in the floors (c) provide large heat transfer areas for the heating! cooling of the rooms using small temperature and entropy entropy (ĕn`trəpē), quantity specifying the amount of disorder or randomness in a system bearing energy or information. Originally defined in thermodynamics in terms of heat and temperature, entropy indicates the degree to which a given differentials. Drawing: Paxton Locher Architects Ltd. |
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