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12:17 Feb 18, 2009 |
French to English translations [PRO] Tech/Engineering - Materials (Plastics, Ceramics, etc.) | |||||||
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| Selected response from: Helen Shiner United Kingdom Local time: 12:25 | ||||||
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3 +2 | inertia |
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inertia Explanation: Winter heat loss from buildings in the northern climates was reduced by using heavy masonry walls, minimizing the number and size of windows, and often using dark paint colors for the exterior walls. The heavy masonry walls used so typically in the late 19th century and early 20th century, exhibit characteristics that improve their thermal performance beyond that formerly recognized (fig. 4). It has been determined that walls of large mass and weight (thick brick or stone) have the advantage of high thermal inertia, also known as the "M factor." This inertia modifies the thermal resistance (R factor) (1) of the wall by lengthening the time scale of heat transmission. For instance, a wall with high thermal inertia, subjected to solar radiation for an hour, will absorb the heat at its outside surface, but transfer it to the interior over a period as long as 6 hours. Conversely, a wall having the same R factor, but low thermal inertia, will transfer the heat in perhaps 2 hours. High thermal inertia is the reason many older public and commercial buildings, without modern air conditioning, still feel cool on the inside throughout the summer. The heat from the midday sun does not penetrate the buildings until late afternoon and evening, when it is unoccupied. http://www.architecturals.net/conserving-energy-in-historic-... -------------------------------------------------- Note added at 27 mins (2009-02-18 12:44:39 GMT) -------------------------------------------------- or would 'thermal inertia' be more precise? -------------------------------------------------- Note added at 33 mins (2009-02-18 12:50:08 GMT) -------------------------------------------------- http://www.everguardinsulation.com/pages/wall.html -------------------------------------------------- Note added at 6 days (2009-02-25 09:13:08 GMT) Post-grading -------------------------------------------------- Thanks for the points, ryancolm |
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