• 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.

Operating hours: cooling water runds 24/7

Cooling in fume hoods

• 1510, 5th floor
  Flow temperature is 17°C
  Flow pressure is 1.0 bar
  Back pressure is 0.4 bar
   
• 1511, 1st and 2nd floor
  Flow temperature is 17°C
  Flow pressure is 2.2 bar
  Back pressure is 1.7 bar
   
• 1511, 3rd and 4th floor
  Flow temperature is 17°C
  Flow pressure is 2.0 bar
  Back pressure is 1.5 bar
   
• 1511, 3rd floor room 319
  Flow temperature is 20°C
  Flow pressure is 5.5 bar
  Back pressure is 0.1 bar
   
• 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.

• 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.

• 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.

• 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

Allan Madsen - mobile 2899 2015