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Recent content by 760106
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Cryogenic motor torque and start current
I am now working for LNG receiving terminal. This is the first time I contact with it. I am interested in LNG pump and motor.I know that the torque and current of motor in cryogenic condition is much lower than the that of motor in normal condition.I also know that is beacause of the cryogenic...- 760106
- Thread
- Replies: 3
- Forum: Electric motors & generators engineering
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how to calculate the Pump load curve
Thanks to vanstoja and cbrn. After vanstoja's expaination, I understand better than before. could you tell me how to determine the pump load torque at the full-load slip speed. is it tested with motor or only calculated? could you tell me the procedure the pump manufacturer purchase the motor...- 760106
- Post #6
- Forum: Pump engineering
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how to calculate the Pump load curve
cbrn (Mechanical): thanks for your answer, but I still not satisfied with these. 1.For qestion one, can you recommend me any books that I can find the equation or the analytical procedure? 2. For second question, my question is for the motor torque curve and pump load curve. You know the motor...- 760106
- Post #3
- Forum: Pump engineering
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how to calculate the Pump load curve
For centrifugal pump,to ensure the motor accelerating the pump to rated speed, the requirement of motor torque should always be higher than the pump load torque. 1. Is there any body know how to calculate the pump load with diffirent rotating speed? 2.normally, pump manuafacture provide us the...- 760106
- Thread
- Replies: 8
- Forum: Pump engineering
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how to design the fire water pump?
The pressure in the piping after the check valve is always maintains about 12 Bar. No leakage in the piping system. The maxium power cumsuption of the motor is 200Kw at 150% capacity. motor power rating is 220Kw. And the pump is starting direct on line. Power supply for the motor is 3 Ph./ 380...- 760106
- Post #4
- Forum: Pump engineering
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how to design the fire water pump?
In one project,we used one fire water pump with capacity about 350m3/h, 120mlc, the power rate of the motor is 220Kw,the discharge pipe diameter is DN300. The check valve between the pump is about 2meter. The pump is under the water line, so the piping between the check valve is full of water...- 760106
- Thread
- Replies: 3
- Forum: Pump engineering
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why the load noise for the double screw pumps
pablo02, I am sorry to make a big mistake in the first message. I should confirmed that using the heatd sea water, the pumps were not ok, the noise was happend again. Either using the seawater or using the process water, the suction pressure of the pumps is all about 1.1bar, and the discharge...- 760106
- Post #7
- Forum: Pump engineering
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why the load noise for the double screw pumps
we have ever checked the design temperature of the pumps, which it is the 75centi-degree. So we don't know what happened for this. we just asked many mechanical engineers to diagnose it.- 760106
- Post #3
- Forum: Pump engineering
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why the load noise for the double screw pumps
I have met a big problem with the double screw pumps(total no. is 6) in ship(150,000DWT). Each pump rated capacity is 400m3/h, rated discharge pressure is 1200kpa. Rated voltage for the motor is 6300V. The pumps are used to pumping produced water which temperature is about 60centi-degree. The...- 760106
- Thread
- Replies: 7
- Forum: Pump engineering
