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Thread: thermal dynamic power

  1. #1 thermal dynamic power 
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    how much power can i get from heat transferring 20degrees to 10degrees C, say i wanted a 1Kw generator, what size device am i looking at to do this?

    my input heat source is unlimited but only has 10 degree difference, any help could be great!


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  3. #2  
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    Your question is very vague.

    20 degrees...what? F? C? 20 K? If it is C-C going from 20 degrees C to 10 degrees C would lose you energy.

    What do you mean your input heat source is unlimited but there is only a 10 degree difference?

    Like...you could start at 1000 Kelvin and then increase it to 1010 Kelvin?


    Always minimize the variables.

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  4. #3 Re: thermal dynamic power 
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    Quote Originally Posted by doggy
    how much power can i get from heat transferring 20degrees to 10degrees C, say i wanted a 1Kw generator, what size device am i looking at to do this?

    my input heat source is unlimited but only has 10 degree difference, any help could be great!
    Power is not energy. Temperature is not energy either. althought heat is.

    Your question is too ill-formulated to admit an answer.
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  5. #4  
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    iv seen stirling engines and they convect to get their power, my heat source is 10 celcius more than atmosphere temp at any given time,

    also i dont want to use a stirling cycle (too much mechanics) I want to use a system more like a refrigeration one, but reverse, (instead of useing engergy to heat, use heat to get energy)

    would that be feasible?
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  6. #5  
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    Hi,

    I think I know what you are talking about. What you are looking for is some kind of Heat Engine, the theoretical maximum efficiency of such a device is determined by Carnot's Theorem.

    see for example:

    http://en.wikipedia.org/wiki/Carnot_heat_engine
    http://en.wikipedia.org/wiki/Heat_engine
    http://en.wikipedia.org/wiki/Carnot%...rmodynamics%29

    and other linked articles to these.
    "Complexity is stupidity disguised as intellect."
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