Booster Pumping Station
The client contacted Thermancy, looking for options to reduce their pumping energy consumption.
The client knew they were wasting pumping energy since the 3 fixed pumps run with their delivery valves partially closed (throttled).
The station has 5 pumps. The fixed speed pumps 1, 2& 3 have a duty of 408m3/h at 60m, and the variable speed pumps 4 & 5 have a duty of 416.4m3/h at 60m.
The normal running combination is for one fixed speed (pumps 1, 2 or 3) and one variable speed pump (4 or 5) to run.
Acuity pump monitoring equipment was fitted to all pumps. Using the Acuity, a pump performance test was completed for each pump to determine the current pump curves.
The data recorded by Acuity showed that the head/flow performance characteristics did not match the current system conditions.
The data highlighted that trimming the pump impeller of the fixed speed pumps was financially the best course of action.
The Acuity provided the precise data need to calculate the trim ratio of the impellers
Over 8% Savings Achieved
The trimming of the impellers moved the pump operating point to an area that matched the present pumping system.
The power saved at this pumping station by avoiding throttling the fixed speed pumps 1, 2 & 3 was 8.3%.