Saint Gobain Isover

Guillaume Pandraud

Florent Alzetto

Didier Roux

Eric Mangematin

Jerome Gilles

Johann Meulemans

Jérôme Gilles

A method for determining a quantity representative of the thermal resistance of a dividing wall between a first environment and a second environment, including, over at least two successive time periods Dcorresponding to distinct heating powers Pof the first environment, measuring the heat flow rate through the wall qand the temperature in the first environment Tand determining the temperature in the second environment T, at closely spaced time intervals; the quantity representative of the thermal resistance of the wall being determined by bringing into convergence: a thermal model expressing the temporal variation of a temperature in one environment divided off from another environment by a wall, as a function of the heat flow rats: through the wall, the temperature in the other environment, and physical parameters of the wall; and the measured evolution T(t) of the temperature in the first environment over time.

Determination of the thermal resistance of a wall

A method for determining a heat loss coefficient of a premises includes undertaking application of first and second heating powers, respectively, in the premises over two successive time periods, selecting for each of the first and second time periods, a time interval for which the evolution is substantially linear, determining the slope of the tangent to the curve (T(t))over each time interval; and deducing the value of the heat loss coefficient of the premises on the basis of the slopes.

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

A method determining heat loss coefficient K of a premises, includes: in unoccupied premises, performing a campaign of measurements of at least one temperature inside the premises Tat closely-spaced time intervals over at least two successive time periods Dcorresponding to distinct heating powers Pof the premises; determining temperature of outside air Tat the same closely-spaced times; for each time period D, on the basis of evolution T(t) of a quantity Tas a function of time, selecting a time interval &#x394;tfor which the evolution T(t) is substantially linear, then determining the slope &#x3b1;of the tangent to the evolution T(t) over this time interval &#x394;t, and deducing the value of the heat loss coefficient K of the premises on the basis of the slopes &#x3b1;.

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Paris, France

Guillaume Pandraud