Pressure Cooker压力锅
Food can be cooked faster in a pressure cooker since the boiling point of water increases with pressure. The pressure cooker consists of a pressurized pot which has controlled vent at a specified pressure above atmospheric pressure. It is typical for the pressure of venting to be about 15 pounds per square inch above atmospheric pressure. That raises the boiling point to about 121°C or 257 °F. 由于水的沸点随压力增加而升高，压力锅可以更快地烹饪食物。压力锅由一个受压的锅组成，其排气阀在超过大气压的指定压力时受控开启。通常，排气压力约为大气压上方15磅每平方英寸。这将沸点提高到约121°C或257 °F。
Since atmospheric pressure is about 14.7 lb/in2, then a gauge pressure of 15 lb/in2 amounts to about a doubling of absolute pressure. The nature of the variation of saturation vapor pressure with temperature places the boiling point at about 121°C. 由于大气压约为14.7 lb/in²，因此一个15 lb/in²的表压相当于绝对压力的约两倍。饱和蒸气压随温度变化的性质使沸点约为121°C。
|
Index Heat engine concepts 热机概念索引 | ||
|
Go Back
返回 |