In the Optimization of Costs Concerning the Usage of Energy in Shopping Malls research we have investigated the field of Cost optimization for the total energy usage of all equipment in shopping malls (not just refrigeration systems). We have confirmed the fact that in small stores the energy consumption of refrigeration systems present even larger percentage than in bigger shopping malls. The second biggest energy consumption is done by heating technique (oven, etc). We have investigated possibilities for controling peaks for combinations of highest loads.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 11186004The flexible prices of electrical energy are enabling new strategies for optimising the energy costs. The paper introduces two different energy-cost optimisation approaches for refrigeration systems in shopping centres. The first represented approach is adjusting the energy consumption profile while changing the temperature references of individual refrigeration cabinets, and the other minimises the number of defrosts as defrosts are triggered only on demand. In order to quantify the effects of such approaches, the article introduces the physical model which describes the temperature and energy dynamics of the refrigeration cabinets and frozen food. Model parameters are identified on the basis of the data measured in the selected shopping centre.
B.06 Other
COBISS.SI-ID: 28529703The main aim of the thesis was to develop a hybrid model of the refrigeration system. The dynamical model of the display case was set-up in the AnyLogic modelling environment. The model was additionally extended with the crucial discrete events, like: door openings, product refilling and periodical defrosting events. In the thesis a detailed overview of the modelling basics was given, where dynamical modelling was only quickly overviewed and the main focus was given to the discrete event modelling. The development of the hybrid display case model within AnyLogic was presented in detail, where each modelling step was elaborated. The presented optimisation analysis was focused on the evaluation of how the door opening frequencies, food mass and defrosting schedules impact on the operating energy costs and the quality of the stored food.
D.10 Educational activities
COBISS.SI-ID: 29358887