Starting with a single time history (CH1) that represents the change in temperature across a system in C°
The resulting time history = Heat Transfer Rate (watt/second)
Hello, We don't have enough information to calculate the Heat Transfer Rate from temperature alone.
If you were to differentiate the Temperature data that would give your the rate of temperature change.
based on the following link, to calculate the heat transfer rate you need information on the thermal conductivity of the material along with the area and the thickness of the material.
Rate = k•A•(T1 - T2)/d
Thank you for the response:
When I differentiate ⁰C it becomes KHz seems like it should be ⁰C/s see the attached
With respects to calculating heat transfer rate using the time signal calculator
thermal conductivity of the material : Iron, cast 55[W∙m^-1∙K^-1] https://en.wikipedia.org/wiki/List_of_thermal_conductivities
Area: 2207657.925 mm^2
Thickness of the material: It is a complex shape (Casting)
Similar to your other question, you need to provide the unit to use or the desired resulting unit in square brackets. In addition to this, (⁰C)/s or (deg C)/s or whichever unit you wish to use needs to exist in your unit system. It is not in our default unit system so resolves to (deg C)Hz as you have found out.
Open your Units Editor (currently LMS Configuration and Unit System 2.2). Highlight one your Temperate units and then press Add Unit. I added the following:
Save your unit system, then start (or restart) Test.Lab. You can then use that unit in your formulas:
CH2 DIFFERENTIATE(CH1) [(⁰C)/s]
CH1 GENERATE_CONSTANT(1.0[deg C];0;10;12800;0)
CH2 DIFFERENTIATE(CH1) [(deg C)/s]