The operating temperature of the superheated steam is 170; how is the design temperature determined? ? Help!
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The steam is superheated steam; the throttle device used has a working temperature of 170°C as determined from the design calculations. The differential pressure transmitter has a range of 0-3.102 KPa, while the thermal resistance thermometer covers a temperature range of 0-300°C. The pressure transmitter operates within a pressure range of 0-1 MPa. How is the design temperature determined? ? ? ? ? ? In our flow meter, the designed temperature is set at 300°C, and the flow rate range is 0–10 t/h (the maximum flow rate stated in the design calculations is 10,000 kg/h). For the steam side, the operating temperature, as determined from the design calculations, is 200°C; thus, the designed temperature in our system is also set at 200°C. The pressure transmitter operates within a pressure range of 0–1 MPa, while the differential pressure transmitter has a range of 0–3.102 KPa, with a flow rate range of 0–20 t/h (the maximum flow rate stated in the design calculations is 20,000 kg/h). Currently, when the flow rates on both sides are at 25%, they do not match, resulting in an error of around ten tons per 24 hours. I think the problem lies on our end; the designed temperature should be based on the 170°C temperature of the throttling device, which is 20°C higher than the operating temperature. It could be set between 190–200°C, rather than being determined based on the range of the thermal resistor. I’m not sure if what I’m saying is correct; I would appreciate any guidance you can provide. Thank you very much! ! This formula is used by those who use steam, and it includes temperature and pressure compensation: Actual flow rate = Input flow rate sample X range X √(P_actual + 0.1) X (T_design + 133.97) / (P_design + 0.1) X (T_actual + 133.97). The design temperatures specified in the formula are 300°C on one side and 200°C on the other; using these values will definitely yield incorrect results!
Uh(⊙o⊙)… I wrote so much just to find out how the design temperature is determined!
When performing temperature and pressure compensation, set it to the working temperature; there’s no need to add anything even if it’s 20 degrees.
The operating temperature changes over time, right? The design temperature is a fixed value that needs to be entered into the program for calculation; I don’t understand this. . .
Since it changes constantly, a thermistor should be added to connect the real-time temperature signal to the integrator. When you mentioned setting a temperature, I thought the temperature was constant.
Bro, the heat resistance is there now – from 0 to 300 degrees! I just want to ask how the design temperature is determined. . .
The “design temperature” here refers to the temperature at which the flow meter was designed; this can be found in the flow meter calculation sheet. From your description, there is thermal and pressure compensation at both ends, but the flow measurement ranges and temperature differences at those ends are too large, which also contributes to the variations in the flowmeter readings. It would be best if both ends were exactly the same.
The flow meter calculation sheet only specifies an operating temperature of 170°C; there is no specified design temperature. What value should be used to set the design temperature in the accumulator now? The additional thermistor covers a range of 0-300°C! Should I choose the range of the temperature sensor? I think it’s not right; please help!