Elevation Changes
Elevation Changes
复制标题
海拔变化
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
R. P. Fleming
中科院分区：
文献类型：
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作者：
Harold S. Wass;R. P. Fleming
在计算自动喷水灭火系统时，必须始终考虑高程的变化。我们所有人（？）在沿着的某个地方学到了一立方英尺的水重62.4磅。（实际上，62.4是水在52.72°F时的重量。它的重量在较高温度下略轻，在较低温度下略重。52.72°，然而，是一个合理的温度）。如果你把一立方英尺看作是一个一英尺见方、一英尺高的立方体，那么很明显，当你用62.4除以一平方英尺中的平方英寸数时，结果就是一英尺高的一平方英寸水柱的重量，或者说是一英尺水所施加的压力，以磅每平方英寸为单位。
Changes in elevation must always be taken into account in calculating a sprinkler system. All of us(?) have learned somewhere along the way that a cubic foot of water weighs 62.4 lb. (Actually, 62.4 is the weight of water at 52.72°F. It weighs slightly less at higher temperatures, slightly more at lower temperatures. 52.72°, however, is a reasonable temperature). If you think of a cubic foot as a cube one foot square and one foot high, it should be apparent that when you divide 62.4 by the number of square inches in a square foot, the result is the weight of a one-square-inch column of water one foot high, or the pressure, in pounds per square inch, exerted by one foot of water.