Saturated steam flow measurement, how to achieve accurate metering?

Project Overview

Saturated steam flow measurement, how to achieve accurate measurement? Today we will briefly introduce the principles, characteristics and measuring instruments of saturated steam generation.

1. Principle of saturated steam generation

When a liquid evaporates in a limited closed space, the liquid molecules enter the space above through the liquid surface and become steam molecules. Since the steam molecules are in chaotic thermal motion, they collide with each other, the container wall and the liquid surface. When colliding with the liquid surface, some molecules are attracted by the liquid molecules and return to the liquid to become liquid molecules. . When evaporation begins, the number of molecules entering the space is greater than the number of molecules returning to the liquid. As evaporation continues, the density of vapor molecules in the space continues to increase, so the number of molecules returning to the liquid also increases. When the number of molecules entering the space per unit time is equal to the number of molecules returning to the liquid, evaporation and condensation are in a state of dynamic equilibrium. At this time, although evaporation and condensation are still proceeding, the density of vapor molecules in the space no longer increases. The state at this time is called saturation state. Liquid in a saturated state is called saturated liquid, and its vapor is called dry saturated steam (also called saturated steam).

2. Characteristics of saturated steam

In the ideal saturated steam state, the three data of temperature, pressure and steam density are corresponding to each other, that is, a certain saturation pressure must correspond to a certain Saturation temperature, by monitoring one of them, you can deduce the other.

3. Measurement of saturated steam

In terms of flow meter selection, LUB series vortex flowmeters can be used for measurement. The LUB series vortex flowmeter has no movable mechanical parts. It has a long instrument life, less maintenance, and a stable instrument coefficient. It will not be affected by changes in parameters such as pressure, temperature, and viscosity of the medium in various working environments. It is the instrument of choice for measuring saturated steam. At the same time, in order to achieve more accurate measurement monitoring, platinum resistors and pressure transmitters can be used to compensate for its temperature and pressure.

For more questions about saturated steam flow measurement, please feel free to contact Supmea Measurement and Control~