Wet steam measurement techniques

Abstract

<jats:title>Abstract</jats:title> <jats:p>In recent years a greater need for power station efficiency has become evident; improving turbine blade efficiency is one of the methods proposed. This efficiency depends upon the wetness of the steam that comes into contact with the blades of the low-pressure turbine stage in general and all turbines in nuclear power generation. Therefore, measurement of the moisture content of the steam in real time in conjunction with an accurate measure of steam velocity can give an overall mass flow re-entering the turbine, allowing for a feedback control. The system can rely on one technique that can measure suspended droplets and wall-bound liquid film, or a combination of techniques can operate together. This work gives a comprehensive review of the different techniques used to measure the moisture content including the liquid film and moisture content and techniques that can give measurements on both simultaneously. Each technique has its strengths and weaknesses, and they were analysed to see which technique works best overall and which techniques can be used together.</jats:p>

A New Type of Flow Measurement Device

“…Flow measurement is widely used in thermal power plants, petroleum, metallurgy, aviation, machinery and other fields. Steam is an important secondary clean energy, which is widely used in power plants, petrochemicals and other industrial production [1][2]. The steam used in the industrial field basically exists in the state of wet steam.…”

An Online Fully-Automatic High Precision Monitoring System of Steam Dryness Based on Spectral Absorption Characteristics

“…The viscosity of the heavy oil was reduced by using high temperature, and heavy oil thermal recovery by superheated steam huff and puff applied in the marginal heavy oil reservoirs was achieved. 1 Generally, steam consists of gas and liquid water droplets. Steam dryness refers to the percentage of gas in steam.…”