Thermal performance

How much energy can a liquid jacked remove 

For water conveying Process-Control-System (PCS) CerCell has tested 4 different configurations simulating an exothermic reaction taking place inside the fermenter. A heating element arranged inside the liquid was set at the mentioned temperatures and temperature versus time drop measured. General cooling water flow 2 litre/min, 12°C inlet cooling water, 500 rpm turbine speed in SUF.

  1. FHC – Flexible-Heating-Cooling element wrapped around the SUF with 5.5 litre VV, 2.5 litre WV, removed power ~5 watt / litre media
  2. Aluminium RHS coil encapsulating the SUF with 5.5 litre VV, 2.5 litre WV, removed power ~10 watt / litre media
  3. Integrated Single-Use-Jacket on SUF with 5.5 litre VV, 2.5 litre WV, removed power ~20 watt / litre media
  4. Integrated jacket on UniVessel STR - glass/steel, removed power ~25 watt / litre media

 In practice we have seen that a 5.7 litre BactoVessel mounted in the RUJ, connected to a Biostat B further connected to 15°C external cooling water supply are able to hold the SUF at 37°C even if 300 watt is lost continuously in the 4 litre WV.