Air Conditioning Leakage

by John A. Herbert
condensate

Spring has arrived, the humidity is increasing and air conditioning and their power consumption start in earnest.

Air conditioning systems rely upon converting electrical energy at the central chiller to chilled water, yet these veins, the chilled pipes are often hidden from view, deep inside the building behind locked plant room doors. The chilled water piping should deliver cold water from the chiller at approximately 7 deg. C to the AHU’s.

However, the photo above is a big problem, the chilled water piping is insulated, covered with vapour barrier, and finished with aluminium cladding. However, condensation is clearly visual and that equates to lost energy. If it not repaired the water wicks along the piping and thermal insulation, causing more condensation, increasingly wasting more energy.

To rectify the wet and damaged thermal insulation needs to be cut back and removed, piping cleaned and insulation replaced, and wrapped with a new vapour barrier, and re-clad. the new vapour barrier is key!! to prevent moist air contacting any surface, including the insulation, having a lower dew point temperature.