The difference and measurement method of superheated steam and saturated steam

Abstract: The difference and measurement method information of superheated steam and saturated steam are provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Steam is the most common power energy medium in industrial production. It can also be used for heating, sterilization, humidification, etc. It can be seen in all walks of life. The following is a brief description of the generation and types of steam: is water vapor, which originates from. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the difference between superheated steam and saturated steam and the details of the measurement method. Steam is the most common power energy medium in industrial production. It can also be used for heating, sterilization, humidification, etc. It can be seen in all walks of life. The following is a brief description of the generation and types of steam: It is water vapor, which comes from water. The water is heated under a certain pressure, and the temperature of the water rises with the continuous heating. When the water temperature rises to a certain temperature, the water begins to boil. At this time, the temperature of the water is called Boiling temperature. If the heating is continued, the water temperature remains unchanged, and the water begins to vaporize and gradually turns into steam. The boiling temperature of water under a certain pressure is also called the saturation temperature. This temperature is related to the pressure it is subjected to. The higher the pressure, the higher the boiling temperature; on the contrary, the lower the pressure, the lower the boiling temperature. If the saturated steam continues to be heated, its temperature will rise and exceed the saturation temperature at this pressure. This steam that exceeds the saturation temperature is called superheated steam. Steam that has not been heat treated is called saturated steam. It is a colorless, odorless, incombustible and non-corrosive gas. There is a one-to-one correspondence between the temperature and pressure of saturated steam, and there is only one independent variable between them; saturated steam is easy to condense, and if heat is lost during transmission, droplets or liquid mist will be formed in the steam, which will cause the temperature to be different from the pressure. pressure reduction. Steam containing liquid droplets or mist is called wet steam. Strictly speaking, saturated steam contains more or less two-phase fluid of liquid droplets or liquid mist, so different states cannot be described by the same gas state equation. The content of liquid droplets or liquid mist in saturated steam reflects the quality of steam, which is generally expressed by the parameter of dryness; it is difficult to accurately measure the flow rate of saturated steam, because the dryness of saturated steam is difficult to guarantee, and general flowmeters cannot accurately detect The flow of the two-phase fluid, the fluctuation of the steam pressure will cause the change of the steam density, and the displayed value of the flowmeter will produce additional errors. Therefore, in steam measurement, it is necessary to try to maintain the dryness of the steam at the measurement point to meet the requirements, and if necessary, compensation measures should be taken to achieve accurate measurement. After the superheated steam is transported over a long distance, with the change of working conditions (such as temperature and pressure), especially when the temperature is not high, it will enter the saturated or supersaturated state from the superheated state due to the reduction of the heat loss temperature. , transformed into saturated steam or supersaturated steam with water droplets. The saturated steam is suddenly greatly decompressed, and the liquid will also be transformed into superheated steam when adiabatic expansion occurs, thus forming a vapor-liquid two-phase flow medium. The density of superheated steam is determined by the two parameters of steam temperature and pressure, and in different ranges of parameters, the expression form of density is also different, and cannot be expressed by the same general formula, so it is impossible to obtain a unified density calculation formula, only individual Derive the temperature and pressure compensation formula. In the case where the temperature and pressure fluctuation range is large, in addition to the temperature and pressure compensation, the compensation for the gas expansion coefficient ε also needs to be considered. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'The difference and measurement method of superheated steam and saturated steam'

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