What does dry dew point mean?
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What does dry dew point mean? Solve
The temperature at which the gas reaches steam saturation
In some devices, water is a harmful substance, such as in refrigeration units; therefore, system drying is required during maintenance of these units. To determine what level of drying is sufficient, the concept of dew point comes into play. As explained above, for instance, if the dew point measured after drying the unit is below -20°C, it is considered satisfactory.
Reply to 2# jhy3902: I still don’t quite understand. Could you explain it in more detail?
The definition of dew point is as follows: Dew point: the pressure at which the first droplets begin to separate from the gas phase at a constant temperature, or the temperature at which the first droplets begin to separate from the gas phase at a constant pressure. In simple terms, it means that after drying, the water content decreases; at 20°C, dew drops appear (in this case, the dew point is 20°C), while after drying, dew drops only appear at -60°C (in this case, the dew point is -60°C). The dew point is generally used to analyze the water content in a system. The dew point temperature corresponds to a certain water content. -A dew point of 70°C implies a water content in the system of around 2 ppm
Reply to 5# chxp110: Dew point: Under a constant pressure (which can be 7 KG or atmospheric pressure), when air (or compressed air) is cooled, a certain temperature is reached at which point condensation water begins to form in the air; this temperature is known as the dew point at that pressure. The dew point at atmospheric pressure is called the atmospheric dew point or pressure dew point, while the dew point in compressed air is referred to as the pressure dew point. With the same “pressure dew point,” the higher the “compression ratio,” the lower the corresponding atmospheric dew point. For example, when the dew point of compressed air at a pressure of 0.7 MPa is 2°C, its dew point at atmospheric pressure is equivalent to -23°C. When the pressure is increased to 1.0 MPa, with the same pressure dew point at 2°C, the corresponding dew point at normal pressure drops to -26°C.