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当你驾驶的拖拉机,由于某种原因水箱“开锅”时,立即打开水箱盖不合适。这是因为,多数轮式拖拉机的冷却系统是密闭式的。大家知道,液体的沸点与它们受到的压力有关。受到的压力越大,其沸点越高;压力越小,其沸点越低。所谓沸点,是指液体表面和内部同时产生大量蒸气时的温度。常压下,水的沸点是100℃,而在密闭的冷却系统中,由于水的膨胀和汽化,系统内部的气压大于外界的常压,所以水箱里水的沸点在100℃以上。当发现水温表指示在100℃时,水箱里的水并未到沸点。如果这时打开水箱盖,由于水箱内的
When you are driving a tractor, for some reason the water tank “open pot ”, immediately open the water tank cover is not appropriate. This is because most wheeled tractor cooling systems are closed. We all know that the boiling point of liquids depends on the pressure they are exposed to. The greater the pressure, the higher the boiling point; the smaller the pressure, the lower the boiling point. The so-called boiling point, refers to the surface of the liquid and the internal temperature when a lot of steam. Atmospheric pressure, the boiling point of water is 100 ℃, and in a closed cooling system, due to water expansion and vaporization, the pressure inside the system is greater than the atmospheric pressure, so the water tank boiling above 100 ℃. When it was found that the water temperature meter indicated at 100 ℃, the water in the water tank did not reach the boiling point. If this time to open the tank lid, due to the inside of the tank