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Heat Transmission Coefficient Measurements in Buildings 7 Utilizing a Heat Loss Measuring Device 8

Global energy efficiency can be obtained in two ordinary ways. One way is to 16 improve the energy production and supply side, and the other way is, in general, to reduce 17 the consumption of energy in society. This paper has focus on the latter and especially the 18 consumption of energy for heating and cooling our houses. There is a huge energy-saving 19 potential in this area for reducing both the global climate problems as well as economy 20 challenges. Heating of buildings in Denmark accounts for approximately 40% of the entire 21 national energy consumption. For this reason, a reduction of heat losses from building 22 envelopes are of great importance in order to reach the Bologna CO2 emission reduction 23 targets. Upgrading of the energy performance of buildings is a topic of huge global interest 24 these years. Not only heating in the temperate and arctic regions are important, but also air 25 conditioning and mechanical ventilation in the “warm countries” contribute to an enormous 26 energy consumption and corresponding CO2 emission. In order to establish the best basis 27 for upgrading the energy performance, it is important to make measurements of the heat 28 losses at different places on a building facade, in order to optimize the energy performance. 29 This paper presents a method for measuring the heat loss by utilizing a U-value meter. The 30 U-value meter measures the heat transfer in the unit W/Km 2 and has been used in several 31 projects to upgrade the energy performance in temperate regions. The U-value meter was 32 also utilized in an EUDP (Energy Technological Development and Demonstration 33 Program) focusing on renovation of houses from the 1960s and 1970s. 34