详细说明
Summer is the hardest season for workers. It is also a peak reason of production accidents because of high temperature caused not only by the outdoor temperature but also by the running machines. Such environment can make human body fatigued, fretted, and dull, which results in low work efficiency and high production accidents. Therefore, the negative pressure fans become the most cost-effective choice to solve this problem.
The negative pressure fans equipped with CTID intelligent rare-earth permanent magnet motors have more advantages such as large ventilation volume and fast ventilation speed, as well as high energy efficiency. The intelligent motors have high sealing performance, which can ensure the efficient operation of the fans under harsh environmental conditions. CTID motors are without the gear transmissions of traditional fans, their speeds can be adjusted, even stepless speed regulation is available. In addition to improving product life, they can also help to realize the intelligent management, precise control, and high energy efficiency. They are easy to operate and can bring sizeable economic benefits. Here is an application case for reference.
Locality: : a metal smelting factory in Xiamen, Fujian, China
Quantity: 35 negative pressure fans
Attempt: increase energy efficiency and economic benefits by replacing the traditional fans
| Items | Before | After |
| Quantity | 1 (with traditional motor) | 1 (with CTID permanent magnet motor) |
| Fan blade | 50 inch | 50 inch |
| Power | 1.5 kw | 1.1 kw |
| Average flow backward wind speed | 6.8 m/s | 7.4 m/s |
| Rated speed | 540 rpm | 540 rpm |
| Rated air flow | 27100 m3/h | 27340 m3/h |
| Rated power consumption | 1,550 kw | 1,118 kw |
| Energy efficient ratio | 17.48 m3/h/w | 24.45 m3/h/w |
| Amount of power consumption | 2,053.16 kw | 1,499.5 kw |
| Remarks: Uninterruptedly run 1,440 hours at the same time and in the same conditions | ||
Conclusion after contrast
The negative pressure fan configured with CTID motor saves 28% electricity than the traditional one and the ventilation volume is larger. If the speed regulating characteristic of CTID motor is fully used together with the speed control panel, the power can be maximumly saved more than 40%, and the ventilation volume can be maximumly increased more than 1 times.
Electricity bill: 0.6/kw.h 。
A) Run 24 hours a day, keep running 365 days in a whole year.
Power saving for a single fan is (1.55-1.118)╳24╳365╳0.6=2,270 yuan a year.
Power saving for all fans (35pcs) is 2270 ╳35=79,450 yuan a year.
B）Run 24 hours a day in Summer and Autumn, 12 hours a day in Spring and Winter, equally run 24 hours for 275 days a year.
Power saving for a single fan is (1.55-1.118)╳24╳275╳0.6=1,710 yuan a year.
Power saving for all fans (35pcs) is 1710 ╳35=59,875 yuan a year.
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