How do temperature and pressure compensated vortex flowmeters calculate the density value of steam?

Project Overview

The temperature and pressure compensated vortex flowmeter calculates the steam density value through online density compensation.

1. Saturated steam online density compensation

The pressure of saturated steam (saturated vapor pressure) and the saturation temperature are in one-to-one correspondence, that is, at a certain saturation temperature, there will be a specific saturation pressure. The density of saturated steam can be a single function of either its temperature or its pressure. According to the temperature value or pressure value of saturated steam, the real-time density value can be obtained through a comparison table or formula calculation method.

In flow measurement, the vortex flowmeter can choose a temperature sensor for temperature compensation or a pressure transmitter for pressure compensation type flowmeter, or choose a flowmeter with temperature compensation function.

2. Superheated steam online density compensation

Superheated steam refers to steam whose temperature is higher than its saturation temperature. It breaks the strict one-to-one correspondence between temperature and pressure inherent in saturated steam. The vortex flowmeter can treat superheated steam as a single medium during the flow measurement process. The density of superheated steam is a combined function of its temperature and pressure. When selecting a vortex flowmeter, choose the temperature and pressure compensation type. In actual use, the temperature sensor and pressure transmitter are turned on at the same time to measure the steam temperature and pressure values ​​in real time. The density value can be accurately calculated based on the superheated steam density table or density calculation formula.

Currently, the temperature and pressure compensated vortex flowmeter is the preferred instrument for measuring steam flow. Due to the wide range of vortex flowmeter models, please feel free to contact Supmea Measurement and Control on how to choose a more suitable vortex flowmeter.