Move power consumption and optimise refrigeration systems.

Purpose and goal:

The aim has been to show the possibilities of significant power reductions in the electricity grid by controlling the operation of refrigeration plants in supermarkets. The electricity load is reduced during the critical hours for the grid through optimisation and change of control parameters. The goods is cooled extra before an expected high load period and then control parameters are changed when the high load period begins so that the load is lower for a number of hours without the goods´ temperature becoming higher than permitted. The tests showed a clear effect in two pilot plants.

Expected results and effects:

The project result shows that there is potential to shift electricity output from critical hours in the morning to night and at the same time reduce the total electricity consumption for refrigeration and freezing facilities for supermarkets and commercial kitchens. The size of the effect is dependent on the status of the cooling systems. The result shows the possibility of shifting some electrical power even in the event of worse system conditions, but the total electrical energy use may then be unchanged or higher.

Approach and implementation:

The project group has consisted of Climacheck AB, Huurre by Caverion and the sub-consultant RISE who had regular meetings to design the methodology for the tests as well as follow-up and analysis of results. The tests have been carried out in two of Huurre´s customers´ facilities. Huurre has been responsible for the practical implementation.

Measurement data has also been logged in Huurre Itop and ClimaCheck online and compiled by Huurre and ClimaCheck. The result has been evaluated by the entire project group and compiled in a Guide for moving power in commercial refrigeration plants.