The paper provides classification of electric energy consumers in cooling technique of an existing shopping center in Slovenia and definition of processes as well as of the belonging strategies which can significantly reduce the electric energy consumption operating costs. Besides listing traditional strategies the focus of this paper are modern methods, especially integration of Demand Response activities in the field of industrial cooling technique.
In the paper the possibilities to save energy in supermarket refrigeration systems are analysed. The study is focused on minimisation of defrosting of a display case evaporators. For this it is needed to identify the presence of ice. As this information is not directly given (measured), we have developed a model, which can identify when the defrosting is actually needed. The study is based only on the data available from the archived measurements. Preliminary results show the promising potential of a presented approach.
Higher energy costs and their negative influence on the environment suggest an efficient electric energy use. Cooling equipment in shopping centers is a large energy consumer, which is the reason their control and management using a central control system is of great importance. This paper presents and investigates four different ways of implementing management on different levels: (1) direct management of sensors and actuators at the lowest (device) level; (2) management through field-bus communication protocols; (3) managing gateways; (4) management through SCADA. We compare the selected approaches from four different perspectives: (a) management application; (b) connectivity; (c) security; (d) implementation costs.