The purpose and operation of the project:
To improve the cooling of the flue gas from the plant’s wood chips plant and thereby increase the plant’s efficiency. Using the absorption cooling machine and associated scrubber system, the flue gas temperature has fallen from approx. 50° down to about 20° C, corresponding to a cooling power of 1 MW. The efficiency of the chipper has increased from approx. 103% to 111%.
The chilled water circuit of the absorption cooling machine is made of stainless steel and can thus be passed directly through the scrubbing water. The chilled water circuit produces as cold water as possible, which is led to the flue gas scrubber for cooling the flue gas. Energy is absorbed from the flue gas and the heated water is returned to the evaporator of the cooling machine, which transfers the energy to the absorber of the cooling machine. The absorber is the throughput of return district heating water, which is in series with the condenser of the cooling machine. The condenser and absorber heat up district heating water to about 50° C and shunt in the flow. The refrigerant’s propellant is district heating water around 105° C, which means that the electricity consumption for such a machine is minimal.
SEG A/S Role:
To supply, install and commission an absorption cooling machine and to teach operating personnel in the use of the machine.
Description of the project content:
The absorption refrigeration plant is comprised of the following areas:
- Design and energy calculations for the absorption cooling machine.
- Absorption chiller with associated components.
- A piece of Thermax absorption cooler type LT27 T, dimensioned to provide 1 MW cooling.