Method and device for determining the heat loss coefficient of a room

• Main Authors: PANDRAUD, Guillaume, ALZETTO, Florent
• Format: Patent
• Language: English
• Published: 22.08.2019
• Subjects: MEASURING; MEASURING QUANTITY OF HEAT; MEASURING TEMPERATURE; PHYSICS; TESTING; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR

METHOD AND DEVICE FOR DETERMINING THE HEAT LOSS COEFFICIENT OF A PREMISES This method, which is aimed at determining the heat loss coefficient K of a premises, comprises steps in which: 10 - there is undertaken, in the premises, over two successive time periods (Dk)k = 1 or 2, the application of a heating power Pk of the premises, and a campaign of measurements of at least one temperature inside the premises T~k at closely-spaced time intervals, as well as the determination of the temperature of the outside air Te at closely-spaced time intervals, where the 15 heating power P, over the first period Di is such that the parameter a=1- AT(O)Kre is less than or equal to 0.8 whilst the heating power P, P, over the second period D2 is substantially zero; - for each time period D, a time interval Atk is selected for which the evolution Tik(t) is substantially linear; 20 - the slope a, or a2 of the tangent to the curve (,(t) over each time interval At, or At2 is determined; - the value Kaie of the heat loss coefficient K of the premises is deduced on the basis of the slopes a, and a2 25 Fiqure 4 11579073_1 (GHMatters)P103460.AU.1 25 -r -- - - -- A--- 74 3,S 21 - - - --- ---... -2- --0 2.s Taki-c) xx x x xxx xxxx2, xI x xx 2.0 xx xxxx 24O 22:00 2300 0:00 o 2;O 3.00 4:00 s0 DI t (hour) Fig. 4 115790731 (GHMatters) P103460.AU.1