Områdea: Industrial wood construction
Budget: 400 000 SEK
Timetable: January 2012 - June 2013
Project Leaders: Helena Johnsson, LTU and Lindbäcks Bygg
Our buildings account for 40% of the society's total energy use (EU Energy Directive, 2010). This has led to the Swedish norm gradually tightened the energy requirements of our buildings (BBR, 2010). Today's energy requirements are halved compared to the level of 30 years ago (SBN, 1980 and BBR, 2010). House construction industry following the development and implementation of product development to meet the requirements. The goal for all new buildings is that 2020 should all be NNE - near-zero energy buildings (EU Energy Directive, 2010). This means that not only energy consumption but also houses density must be of the highest class. This places great demands on the precise manufacturing (Boqvist, 2010) and to get there you have to work actively to measure energy consumption, leakage through the building envelope and air tightness of buildings.
Heat leakage through the building envelope is measured by infrared camera. The measurement, however, is entirely dependent on the weather conditions outdoors and skill of mätteknikern. The interpretation of the data is currently no accepted method. Measurements of air tightness is usually done by a different measurement techniques, making a cross-analysis of data never implemented, although the air-tightness and leakage of heat through the building envelope are closely intertwined.
Purpose, objectives and boundaries
An increased focus on measurable parameters while increasing demand for construction companies to ensure their products and to finance and carry out measurements of their components. In Norrbotten, the number of construction companies large and they meet specific requirements, as our northern climate exposes buildings for extreme conditions. With the prevailing uncertainties in the measurement and interpretation of data, it will be difficult to reach a significant level of quality for energy efficiency. Our idea is, therefore:
Building a test house where building components and connections can be tested for heat loss
and air tightness. The idea is to create a catalog of measurements where the weather conditions are known.
When a new measurement results can be calibrated against the directory, thus eliminating external
influencing factors. Measurement objects can e.g. be connections to ports, new types of wall
connections of King floors and inside corners.
The project idea has already begun to be realized through the work of the Interreg project Increasing Energy Efficiency in Buildings, IEEB. This means that TCN will support parts of uppbyggnade of Energy Cube