Problem of decreasing temperature in steam pipelines
Thread Content
For a DN300 medium-pressure steam pipeline, when the flow rate was around 20 t/h, the temperature difference between the inlet and outlet was not significant. However, when the flow rate increased to 60 t/h, the outlet temperature dropped significantly compared to the inlet temperature. How can this phenomenon be analyzed?
Personally, I think it might be a heat retention issue; with higher flow rates, the velocity increases, leading to more heat dissipation.
1 The pipeline insulation is poor； The superheater was not adjusted properly; no timely adjustment was made, resulting in an increase in flow rate and a decrease in steam superheat ；
The pipe insulation system is inadequate; with a higher water flow, heat dissipation occurs much faster
As the flow rate increases, the pipeline resistance rises. The energy of the steam is consumed, resulting in a decrease in its quality.