Abstract
The contribution of buildings towards energy consumption has dramatically increased over the past decade. According to the EC’s Joint Research Centre, HVAC systems in Europe were estimated to account for approximately 11% of electricity consumed in Europe [1] and with associated CO2 emissions highly contribute to global climate change. This paper deals with the electricity consumption of air-conditioning systems in buildings in the Czech Republic. The paper presents results of actual measurements in 15 mostly office buildings over a 5 year period. The extensive analysis of measured data is presented in graphs and tables. A considerable difference in the electricity consumptions for cooling between the various administrative buildings is identified. The advanced commissioning of air-conditioning systems and its general application in the Czech buildings is presented in the paper as well. Energy consumption measurements, proper operation and application of advanced commissioning are identified as important methods tool to reduce energy consumption of air-conditioning systems in existing buildings.
Highlights
Increasing energy performance of buildings is one of the most important current issue of European Union and Czech Republic in these days
According to the EC’s Joint Research Centre, HVAC systems in Europe were estimated to account for approximately 11% of electricity consumed in Europe [1] and with associated CO2 emissions highly contribute to global climate change
The most promising appeared to be using of a total energy reference area which is accessible from energy performance certificate
Summary
Increasing energy performance of buildings is one of the most important current issue of European Union and Czech Republic in these days. There is almost no dealing with this issue in Czech Republic and serious measurement results of cooling consumptions are missing. Cooling energy consumptions of buildings are not available for detailed assessment of buildings energy performance as well as for regular inspection of air condition systems according to current Czech legislation. The aim of this paper is to demonstrate cooling energy consumptions of 15 buildings. These data were obtained during real field monitoring of these buildings during a period of 5 years. Possible influences of cooling energy consumptions are evaluated in this paper and the results of analysis from measured data are shown. Based on the results from data analysis, main tools, which appeared to be essential for decreasing the energy consumption for cooling, are discussed
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