EXPERIMENTAL DETERMINATION OF THE HEAT TRANSFER RESISTANCE OF THE WALL OF A SINGLESTOREY RESIDENTIAL BUILDING WITH A WOODEN FRAME

Abstract

The paper investigates the application of the temperature method to the full-scale experimental determination of the heat
transfer resistance of the walls of a residential building with a wooden frame. Thermal insulation layer of mineral wool boards
150 mm thick. One of the main advantages of the temperature method is the relatively inexpensive equipment and the relative
simplicity of processing the measurement results. Knowledge of the real heat transfer resistance is important for ensuring the
energy efficiency of old and newly built buildings. For the former, this is necessary for their thermal modernization in order to
increase energy efficiency. For the latter, this is necessary to control the design and execution of work, achieving the planned
energy efficiency parameters. The temperature method was used, which consists in recording the temperature in the room,
outside and the temperature of the inner surface of the wall under study with a given interval. Elitech RC-4HC, Inkbird IBSTH2,
UNI-T UT325F temperature recorders were used. During the measurements, certain requirements were met: the
temperature difference between the outside and inside of the house was not less than 15°C, the change in the internal
temperature was not more than 2°C, the change in the external temperature was not more than 5°C, the temperature was
measured at a height of 1.5m above the floor, the internal and external air temperature sensors were located at a distance of
30 cm from the wall, the temperature on the wall surface was measured by three thermocouples with a distance between them
of 10-15 cm. The selection of a thermally homogeneous area for measurement was carried out using the analysis of the wall
structure and the results of infrared thermography. The influence of measurement duration and measurement results
processing methods on the results of this design was investigated.