The flow rate is 100, the pipeline length is dn150, and the length is 1000 meters. 60 elbows, how does Yang Cheng calculate this?
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The flow rate is 100, the pipeline length is dn150, and the length is 1000 meters. 60 elbows, two gantry heights of 6 meters each. The height difference is 7 meters. How does Yang Cheng calculate something like this?
This post was last edited by Little Chemical Engineer on 2017-11-30 14:20 Strict calculation must know the density and viscosity of the medium inside. If calculated based on water, the pressure loss is about 317KPa. If the head is converted by a safety factor, a pump of about 40m can be enough. (First and last pressure is not considered)
This is the current working condition. As for the pump, it used to be a submersible pump with a flow rate of 100 and a head of 60. But with this flow rate, the dn80 section of pipe will definitely not work, so I want to change the pump. If the flow rate is 100, then there is no need to consider the head-end and end pressure. Just calculate the height difference + straight pipe pressure loss + local pressure loss.
This is the current working condition. As for the pump, it used to be a submersible pump with a flow rate of 100 and a head of 60. But with this flow rate, the dn80 section of pipe will definitely not work, so I want to change the pump. If the flow rate is 100, then there is no need to consider the head-end and end pressure. Just calculate the height difference + straight pipe pressure loss + local pressure loss.
The predecessor is like this, dn80 length 300 flow rate 100 medium water material carbon steel. In this case, the pressure loss in this section alone would be huge, and the flow rate would exceed 5. This must not work, right?
100m3/h DN150 has a flow rate of 1.5m/s. For DN80, the flow rate is 5.5m/s. The pressure loss is proportional to the square of the flow rate. Look at the length of the DN80 pipe and carefully calculate the pressure loss of the DN80 pipe. It must be very high! Therefore, it is better to carefully calculate the size of the pipe and calculate the pressure loss in detail.
It is estimated that 40 meters is enough. 1000×0.01+60÷3+6+7＝43
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