Looking for suggestions to reduce condensation in pumping stations.
asked 22 February 2017 asked by underpressure (1480 points)
The cheapest way is to insulate the pipes, you cannot work against the physics
There will always be condensation in certain conditions and insulation won't affect that. If the temperature is 65Fand the RH is 70%, your dew point is 55F and most water coming out of the ground will be 55F, meaning your pipes are 55F and you will see condensation. You need a dehumidifier to keep the RH low enough to lower the Dew Point below the temperature of surfaces in the pump rooms. Insulating them won't change that your RH is still too high and you will see corrosion elsewhere until that RH is reduced. I can't "advertise" on here but there are most certainly a number of commercial refrigerant and desiccant dehumidifiers that are capable of doing this. You are correct that small portable dehus will not work, they aren't designed to work in these conditions.
Fans and dehumidifiers and lots of em :)
Our main raw water pump station has this issue repeatedly. We live up north in a cold climate half the year and having to keep the building warm causes condensation build up continuously. What we have found that works is keeping the ambiant room temp. Only as warm as it needs to be. In our case its only 10 -15°C above freezing. Coupled with this is air exchanges in the building. This will help keep the RH down and help prevent but may not totally elimate the condensation. You may just get some pipe "sweating" but wont be significant. Good luck.