A METHOD FOR CALCULATING THE ENERGY EFFICIENCY OF REFRIGERATION SYSTEMS DURING ONGOING OPERATION

摘要

In many areas, such as industry, supermarkets or commercial applications, refrigeration plants are responsible for a significant part of the total energy consumption of buildings. According to a study of the German Refrigeration and Air Conditioning Association (DKV), electrical energy consumption for cooling applications accounts for about 14% of the total electrical energy consumption in Germany. Even more surprising is the fact that, until now, the efficient operation of refrigeration systems has been a subject that receives comparatively little attention in practice. One reason for this is that there are no established and methodically based methods available to calculate the energy efficiency during the ongoing operation of refrigeration systems in Germany. In this paper, energy efficiency ratio factors will be presented to assess refrigeration systems by choosing suitable system boundaries. In this context, these factors can also be used as energy efficiency benchmarks between different refrigeration systems. First experimental results with measurements at different refrigeration plants based on this in-situ method will be presented. A mobile measurement system for calculating the energy efficiency of existing plants will also be presented.