クランプオン型超音波流量計による65A配管での湿り蒸気流量の計測

抄録

Steam is widely utilized for thermal energy supply in the industrial fields. It is vital to be aware of the flow rate of the steam at demand end from the viewpoint of energy management. The practical steam piping of the factories often have a wet steam flow resulting from heat loss, heat supply, work, and so forth. It is well known that the measurement error of the steam flow rate is caused by the steam wetness. However, the method for estimating the measurement error has not been established yet since it is hard to evaluate the effects of the steam wetness quantitatively in plants and factories. A clamp-on type ultrasonic steam flow meter is useful for the factory since it is not necessary to pipe processing. We have conducted the wet steam flow test with this clamp-on type ultrasonic flow meter and found some characteristics. In this paper, we conducted the steam flow test with the same flow meter to the piping having different diameter from our previous measurement. Based on the measurements, we considered the correction method for measurement using the clamp-on ultrasonic flow meter in a wet steam flow by correcting the density in the flow rate calculation.