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Topic Title: Heating system switches?
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Created On: 23 January 2012 12:28 PM
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 23 January 2012 12:28 PM
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Avatar for marshall1975.
marshall1975

Posts: 7
Joined: 11 July 2011

I'm preparing a paper on heating systems which work automatically, the basic idea being that a switch is required to turn the heating on when the temperature falls below a set value.

List temperature-dependent changes in materials properties (one each from gradual, accelerating and sudden) that could be exploited in a 'cold' sensor that could be used to turn the heating system on and off.

Taking it a step further could these be used in 0 degrees C?

Thanks...
 23 January 2012 01:07 PM
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Avatar for dougflorence                                      .
dougflorence

Posts: 74
Joined: 25 July 2008

Err... has the bimetallic strip thermostat not been invented already?
 09 February 2012 12:59 PM
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oneye

Posts: 158
Joined: 25 February 2008

You appear to describing the function of a frost 'stat.
Are you looking at something more sophisticated ?

Network Rail use a device which not only detects near 0 deg.C temperatures but also inclement weather - when it snows but air temperature is well above freezing.
 13 February 2012 08:14 AM
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Avatar for marshall1975.
marshall1975

Posts: 7
Joined: 11 July 2011

Thanks oneye sounds like what im after
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