The SOKI Project – Super Optimized Carton Freezer

The SOKI project is a project by the Danish Technological institute investigating the optimization of blast-freezing tunnels and ways to improve the freezing process. The project findings show huge energy savings to be found with minimal effort.

About the SOKI project

A large amount of meat is frozen in batches in blast-freezing tunnels. These tunnels are designed according to old rules of thumb and they are in most cases running a constant airflow.

By optimizing the running conditions of the tunnel, extensive energy savings can be obtained. A Danish ELFORSK research project regarding the energy-saving potential of industrial blast-freezing tunnels verifies these savings.

80 percent savings can be obtained by halving the airflow and two hours of safety on the freezing time still remain

Qoute from the conclusion

The project covers the testing of an industrial tunnel combined with laboratory tests, models, and CFD calculations.

The SOKI report presents the results of the project. The focus is on the possibilities to either optimize the efficiency of the tunnel or to reduce the freezing times. Optimization is achieved through modeling and testing. The optimization of the fans, the airflow through the tunnel, and the control strategy are investigated.

SOKI project testresult on airflow:

Reducing airflow saves a considerable amount of energy
86 percent energy savings when utilizing the 36 hours freezing time
First part of the airflow reduction is the most important
80 percent savings can be obtained by halving the airflow and two hours of safety on the freezing time still remain

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