Industrial Energy Saving Retrofit
Medium voltage VFD retrofit on induced draft fans and circulating water pumps, with throttling losses removed and closed loop pressure control added.
Original condition
Fans and pumps were sized for maximum campaign and then throttled by dampers and valves for most of the year. Energy was billed per tonne of product with no sub-metering, so nobody could say where the loss was.
Engineering approach
Measured results
Values recorded on this project under its own operating condition. Results at another plant depend on fuel, material, load profile and the local standard in force.
| Item | Before | After |
|---|---|---|
| Retrofit scope | Damper and valve throttling control | 12 drives, 15 kW to 1,250 kW |
| Fan operating point | Far from best efficiency point | Speed controlled to match load |
| Measured power saving | Baseline metering installed | Saving verified by before and after metering |
| Start-up current | Direct on line inrush | Soft start with reduced mechanical stress |
Outcome
Twelve drives were commissioned across induced draft fans, circulating water pumps and a compressor. Power consumption at the same production rate dropped in line with the reduced speed operation, verified by the before and after metering protocol. The exact saving rate depends on the load profile of each machine.
Site records
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نستخدم ملفات تعريف ارتباط أساسية فقط لتشغيل هذا الموقع وحفظ لغة اختيارك وقرار الموافقة. لا يتم تعيين ملفات تعريف ارتباط للإعلان أو التتبع عبر المواقع. اقرأ سياسة الخصوصية سياسة الخصوصية.