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Re: [Phys-l] heat loads



I'm not sure what you want...do you mean the average thermal conductivity of your house? You could I suppose turn off the heat and track the interior temperature as function of time. That should be an exponential decrease in temperature with the conductivity in the exponent, so if you did the proper linearization you could extract the product of the conductivity and the geometric factors like area and wall thickness.
The other way would be to know how much energy was necessary to maintain the temperature at a given exterior tempature. You could get other values of heat loss rate by assuming that the rate is proportional to the termperature difference between the inside and the outside.

hope that helps


Joseph J. Bellina, Jr. Ph.D.
Professor of Physics
Saint Mary's College
Notre Dame, IN 46556

On Feb 17, 2006, at 8:29 PM, fred bucheit wrote:


A question for this august group. I would like to be able to approximate
the heat load and cooling load of my house for various outside temperatures.
(don't worry about convection as my house is tightly sealed). If I know the
heat output of the heater in my house and if I record the heat output at a
given outside temperature (while In equilibrium), how many data points would
I need to draw a reasonable graph so that I could extrapolate and
interpolate the heat load at various outside temperatures?
Would the graph be pretty close to and exponential curve?

Fred Bucheit semi-retired Physics teacher... ~~A stitch in time saves
thread and time~~

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