Calculations for Flex Heater
Calculations for Flex Heater
(OP)
I am working on integrating a flexible heater into a design that currently houses Pyrex test tubes. The idea is to pre-heat the samples before they enter the measurement chamber.
I have carried out the Overall Heat Transfer Coefficient calcs to determine what that would be. Now I am kind of stuck. What do I need to do to be able to determine what the correct sizing would be for the heater (they are being rated as X W/in^s) and how long it will take to raise the sample from room temp to 70 deg C?
thanks for any help
Jay
I have carried out the Overall Heat Transfer Coefficient calcs to determine what that would be. Now I am kind of stuck. What do I need to do to be able to determine what the correct sizing would be for the heater (they are being rated as X W/in^s) and how long it will take to raise the sample from room temp to 70 deg C?
thanks for any help
Jay





RE: Calculations for Flex Heater
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RE: Calculations for Flex Heater
I'm sure there is a calculation relating heat required and heat flow I just can't seem to remember/find it.
Can I just multiply the heat flow by time and have the output be how much heat has been transferred to the system in that time frame? I could then set Q = (heat flow)*(time) to determine how long it will take to get up to temp.
RE: Calculations for Flex Heater
This gives you the absolute minimum possible time to achieve the end result. However, for any bulk process, there are thermal conductivities not accounted for here.
TTFN
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