The Experimental Analysis and Calculative Assessment of Building Energy Efficiency

Abstract

The objective of the article is the energy efficiency assessment of an energy-saving measures complex on the basis of calculation-and-experiment control of building energy-saving. An experimental determining of energy indices of multi-apartment residential building during heating period was carried out. The energy audit was carried out applying express method which allows reducing significantly the labour intensity as well as the duration of the field observation. The thermal energy consumption for heating and hot water supply as well as electrical energy consumption during heating period were determined on the basis of the energy audit results. The energy efficiency class of the building is С (normal). Thus it has been stated that the building inspected conforms to the normative requirement. The verification of the calculation method for building energy indices during heating period was conducted on the basis of experimental investigations results, which confirmed the method reliability. The method for calculating the building energy indicators during the heating period including the consumption of thermal energy for heating and hot water supply and the electrical energy consumption was developed. Based on the calculation results it is possible to show that decrease of building envelope air permeability allows to raise a class of building energy efficiency.