Project: AHU Fan Conversion
Duration: 30 Days
A client requested to convert 8 Air Handling Units from belt driven units to direct driven with the aim of increasing the air flow, reducing maintenance labour costs and reducing the energy consumption from the applications.
Phase 1 was to prove the existing air flow, survey the units and specify a range of plug in fans that could be fitted within the AHU Panels.
Phase 2, was the purchase the required materials, which were stored on site. The existing drive units were then removed and disposed of, new frame work (pre-fabricated off site) was fixed to floor of the AHU and the new fans were then installed. New panelling to coil face was installed and the dampers moved. AHU panels plugged where the old equipment had been removed to ensure there were no air leaks within the chamber. The system was then tested and new airflow readings taken, resulting in an increase in air flow.
The final phase was to complete the remaining 7 AHU’s.
|Plant Ref||Before Conversion||After Conversion|
|AHU 1 supply||11.457 m3/s||16.316 m3/s|
|AHU 1 extract||14.952 m3/s||15.073 m3/s|
|AHU 2 supply||11.334 m3/s||17.998 m3/s|
|AHU 2 extract||12.529 m3/s||14.138 m3/s|
|AHU 3 supply||12.830 m3/s||14.289 m3/s|
|AHU 3 extract||10.873 m3/s||14.439 m3/s|
|AHU 4 supply||11.410 m3/s||16.019 m3/s|
|AHU 4 extract||8.644 m3/s||14.314 m3/s|
|Monthly PPM (based on 3 hours)||£1560.00||£65|
|Drive Belt Replacement||£640.00||Nil|
|Motor & Fan Bearing Grease||£11.80 per visit||Nil|
|Replacement Drive (Pulleys) per year||£1860.00||Nil|