FIELD: measurement.
SUBSTANCE: invention relates to determination of thermophysical characteristics of enclosing structures and can be used in construction for evaluation of heat-shielding properties based on results of tests in natural conditions. Disclosed is a method for determining change in relative humidity and moisture condensation zone through the thickness of the external wall enclosure based on the results of thermophysical tests in natural conditions, which consists in the development of a graphic method for determining changes in relative humidity and moisture condensation zone along the thickness of the external wall enclosure based on the results of thermophysical tests in natural conditions. To plot the temperature distribution graph by layers on an arbitrary scale, the wall thickness of the analysed sample is displayed, broken down into layers at the thermocouples installation points, and parallel to the wall surface, a vertical temperature scale is drawn, from which points of corresponding temperatures taken from the graph obtained from the computer data bank are transferred to the selected layers. Values of maximum possible elasticity of water vapour are calculated by known temperatures obtained from sensors placed in thickness of the investigated enclosure, and plotted temperature distribution graphs. Value of the vapour permeability coefficient of each layer and the graph of change in the actual elasticity of water vapour are determined, the values of which are used to determine changes in relative humidity along the thickness of the enclosure.
EFFECT: high accuracy and reliability of determining changes in relative humidity and determining moisture condensation zones along the thickness of the enclosure.
1 cl, 5 dwg
