I was hired to use the CC61 coil washing system to clean the chilled water coils of a 51 story building recently.
Here is what the engineer in charge of the re commissioning project reported:
We found cleaning the coils did help a lot. After they were cleaned, the static pressure drop was found to be 0.391 inches. In our original calculation we stated the drop would be reduced to 0.33 inches after being cleaned which is published data for new coils. We calculated a total of 53,900 kWh savings and 11 kW savings.
So the savings will be very close to what we predicted for cleaning the coils. However the fan speed in the unit was also reduced from 100% to 75% which is going to add additional savings.
There are also vastly improved thermal efficiencies throughout the clean coils.
The savings resulting in more efficient use of chilled water will be calculated shortly.
Assuming 8 cents per kWH, the savings for this one 60 H.P. motor are $4312.0 per year.
Total annual savings for the building are in excess of $50,000.00