On the application of three-stage centrifugal pumps
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Ternary flow pumps are designed using the \"ternary flow theory of turbomachinery,\" which helps to improve the efficiency and operational reliability of the pumps. It is said that some companies have already applied such modifications to their circulation pumps. I’m not sure what the results of the modification will be; please share your experiences, fellow sailors who have carried out such modifications.
The key issue is how to evaluate the results after the renovation; we are stuck at this stage, which is why the leaders have ordered that things be put on hold for now
Reply to 1# sjzhxwwh: I work for a pump factory; we have carried out tri-flow modifications on circulation pumps for several large petrochemical companies, with flow rates ranging from 1500 to 5500 m3/h. The original pumps were all over 10 years old. Taking one particular project as an example, see the table below:
Part Number, Model, System Total Flow Rate (m3/h), Motor Input Power (kW), Motor Operating Current (A), Pump Efficiency ≈ %
Before Renovation, After Renovation, Before Renovation, After Renovation, Before Renovation, After Renovation
X1DSM620-720: 840, 669.25, 54.57, 0.5857, 68.8
X2DSM620-720: 669.25, 64.17, 0.5957, 67.6
X4DSM620-720: 669.25, 73.67, 0.6057, 66.5
Energy consumption table before renovation:
X1, X2, X4 – Total energy consumption: 669.2 kW/h, 669.2 kW/h, 669.2 kW/h; Combined total: 2007.6 kW/h
Energy consumption table after renovation:
X1, X2, X4 – Total energy consumption: 554.5 kW/h, 564.1 kW/h, 573.6 kW/h; Combined total: 1692.2 kW/h
The annual energy consumption of the system after renovation is:
1692.2 kW/h × 8400 h = 14,214,480 kW/year
The annual energy consumption of the system before renovation was:
2007.6 kW/h × 8400 h = 16,863,840 kW/year
Calculation of energy savings rate:
Energy savings rate = (Energy consumption before renovation – Energy consumption after renovation) / Energy consumption before renovation × 100%
= (16,863,840 kW/year – 14,214,480 kW/year) / 16,863,840 kW/year = 15.71%
Annual cost savings from energy savings:
= (Energy consumption before renovation – Energy consumption after renovation) × Electricity cost per kW
= 2,649,360 kW/year × 0.55 yuan/KW = 1,457,148 yuan
This is for your reference. If you have any questions regarding the details of this pump room or the specifics of the renovation, please send me an email at Malcolm.geng@gmail.com; I will provide you with information about the owner and other relevant details.
Part Number, Model, System Total Flow Rate (m3/h), Motor Input Power (kW), Motor Operating Current (A), Pump Efficiency ≈ %
Before Renovation, After Renovation, Before Renovation, After Renovation, Before Renovation, After Renovation
X1DSM620-720: 840, 669.25, 54.57, 0.5857, 68.8
X2DSM620-720: 669.25, 64.17, 0.5957, 67.6
X4DSM620-720: 669.25, 73.67, 0.6057, 66.5
Energy consumption table before renovation:
X1, X2, X4 – Total energy consumption: 669.2 kW/h, 669.2 kW/h, 669.2 kW/h; Combined total: 2007.6 kW/h
Energy consumption table after renovation:
X1, X2, X4 – Total energy consumption: 554.5 kW/h, 564.1 kW/h, 573.6 kW/h; Combined total: 1692.2 kW/h
The annual energy consumption of the system after renovation is:
1692.2 kW/h × 8400 h = 14,214,480 kW/year
The annual energy consumption of the system before renovation was:
2007.6 kW/h × 8400 h = 16,863,840 kW/year
Calculation of energy savings rate:
Energy savings rate = (Energy consumption before renovation – Energy consumption after renovation) / Energy consumption before renovation × 100%
= (16,863,840 kW/year – 14,214,480 kW/year) / 16,863,840 kW/year = 15.71%
Annual cost savings from energy savings:
= (Energy consumption before renovation – Energy consumption after renovation) × Electricity cost per kW
= 2,649,360 kW/year × 0.55 yuan/KW = 1,457,148 yuan
This is for your reference. If you have any questions regarding the details of this pump room or the specifics of the renovation, please send me an email at Malcolm.geng@gmail.com; I will provide you with information about the owner and other relevant details.
Reply to 2# rainy_6680: Use the savings on electricity bills as a basis for consideration; that’s how we do it. No payment if power isn’t saved. The energy savings rate is calculated by dividing the power difference before and after the renovation by the power level before the renovation. You can refer to my example above and recalculate it by yourself.
I would like to learn in detail about the principles of three-phase flow design; I am preparing a paper to submit to my company to see if it’s possible to modify the three large circulation water pumps used there. Could you provide me with relevant information? My tank: 59868381@qq.com
Energy conservation might be real, but the three-stream theory – I’ve heard from an expert before that it is merely a conceptual theory. . .