Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 11, 2022 - September 14, 2022
In industrial fields, as the steam is commonly utilized for heat supply, drying process and so on, it is important to be aware of the steam flow rate in the view point of energy management. However, the steam utilized in the factory is usually wet steam condition. Though it is well known that the wetness affects the flowmeter reading, it is difficult to clarify the effects of the wetness in the steam flow quantitatively in actual plants and factories, and thus far, there has been no established method for estimating the error caused by the wetness of steam flow. Therefore, we have started to investigate the effect of the wetness to the steam flow meters.
The characteristics of several steam flow meters in the wet steam were described in this report, and the relationship between the steam wetness and supply heat of the wet steam has been investigated. As a result, in the wet steam, the indicated flow rate underestimated the actual flow rate and the flow rate difference between them became bigger when the wetness became larger. The supply heat ratio evaluated from indicated flow rate was also smaller than that from actual flow rate, however, the degree of the difference was smaller (less than 5%).
