Cooling water

Definition:

  • In the buildings that have been renovated, there is a recirculated cooling water system.
  • Using a closed cooling water system minimizes the risk of water damage, and it is avoided to use the expensive drinking water for process cooling (which is also forbidden).
  • Also, this avoids the noise and heat in the laboratories  that would arise when using a chiller (”Julabo”).
  • Separate circuits are used for process cooling and cooling of instruments.
  • Instrument cooling is set up for the specific instrument.

Function:

Cooling in fume hoods

  • 1512, 1st and 2nd floor
    Flow temperature is 15°C
    Flow pressure is 4.4 bar
    Back pressure is 0.4 bar
  • 1512, 3rd floor, room 317
    Flow temperature is 20°C
    Flow pressure is (no pressure gauge)
    Back pressure is 1.0 bar
  • 1512, 3rd and 4th floor
    Flow temperature is 15°C
    Flow pressure is 1.4 bar
    Back pressure is 0.9 bar
  • 1513, 2nd floor
    Flow temperature is 16.5°C
    Flow pressure is 1.5 bar
    Back pressure is 1.0 bar
  • 1513, 3rd floor
    Flow temperature is 16.5°C
    Flow pressure is 1.3 bar
    Back pressure is 0.5 bar
  • 1513, 5th floor
    Flow temperature is 12°C
    Flow pressure is 1.2 bar
    Back pressure is 0.8 bar
  • The cooling water is normal tap water - nothing has been added.
  • It is possible to have pressure and temperature set at other values.
  • In case of a larger leak, the cooling water shuts off after a loss of approx. 25 liters.

Application:

  • The item to be cooled is to be connected to the blue valve (flow) and the red valve (backflow).
  • Open completely for the backflow and adjust the flow at the required value.
  • The static pressure in the cooling water system is significantly higher than when using ”tap for drain”.
  • Thus is it very important that you use stable connections and hose binders, as the hoses will otherwise often pop off.

FAQ/Typical errors:

  • Tubes pop off. 
  • Cooling water must be recirculated!
  • If you just connect the ”blue tap --> set-up --> drain”, you will drain the cooling water system in a few minutes, and then the system will shut down.
  • The higher pressure requires stable connections.

In case of operational problems:

  • Procedure for filling of water and restarting after emergency shutdown:
  • Stop the damage  -  Find the damage
  • Take a walk around to the laboratories that might have been affected by the damage
  • Contact the staff

Contact:

Allan Madsen - mobile 2899 2015
John Mahler - mobile 2446 4735

118366 / i31