Thermal and pressure compensation vary significantly across different locations
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To provide heating for users, one set of instruments with temperature and pressure compensation each is installed at the outlet and at the user’s location. Currently, there is a significant difference in the measurement values: the pressure at the outlet is 11.5 Mpa, while it is 0.48 Mpa at the user’s location. The flow rate at the outlet is 5.4 t, whereas it is 3.6 t at the user’s location. Has anyone encountered this issue? Please help analyze it
Hehe, was it stolen along the way?
Are the two flow meters products of the same manufacturer? If they are throttling devices, the first one already performs throttling, and the second one experiences pressure loss; coupled with temperature loss, its flow rate will definitely be lower than that of the first one
1. Both the length of the pipeline and the throttling effect of valves cause a drop in pressure; the longer the pipeline, the more significant this effect is. The pressure and temperature compensation coefficients of the two gauges should be different in order to minimize losses； 2. Both watches should be from the same manufacturer, with identical accuracy levels, and must undergo unified calibration ；
Piping: 1200 meters, new insulation installed
There’s no need to worry; the measurement values downstream of the steam measurement will definitely be lower than those upstream. Modify the meter coefficient of the downstream flowmeter so that its display results match those of the upstream one; this will prevent managers who don’t understand the principles of measurement from complaining to you!
Steam heating, right? Then one has to consider the losses along the way – whether the insulation measures along the route are inadequate or whether the insulation facilities are damaged. In such cases, steam condenses significantly along the way, resulting in a substantial drop in both pressure and temperature
Extremely frustrated! The instantaneous flow rate after temperature and pressure compensation here is 2.5 tons, while the flow rate at the user’s end, 1200 meters away, is 5 tons after compensation; the cumulative value there is also higher than ours :(
A 1.2-meter steam delivery pipe? Firstly, with such a large diameter, temperature drops are likely to occur along the pipeline during winter, especially in northern regions where the temperature differences are significant; this leads to the formation of unsaturated steam. In that case, the pressure at the user’s end will be lower than that at the outlet. Additionally, it is difficult to accurately measure unsaturated steam – it’s possible that the pressure at the outlet is indeed lower than that at the user’s end 1200 meters away. This is because the selection criteria and temperature/pressure compensation parameters provided by you are theoretical in nature, while the instrument manufacturers develop the corresponding temperature/pressure compensation components for you. One solution is to increase pressure; insulation measures must be implemented very effectively. The best part is that the instrument on the user side can provide the manufacturer with the exact temperature and pressure values measured there, so that they can carry out temperature and pressure compensation.