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Thread: hybrid b/w refrigrator and oven!

  1. #1 hybrid b/w refrigrator and oven! 
    Forum Senior precious's Avatar
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    refrigrator makes hot things cold (where that heat goes?)
    oven makes cold thing hot ( where that coldness goes?)

    if we connect both of them, then the heat of refrigrator can be used for oven and coldness of oven can be used for refrigrator. without a lot of expenditure of energy.

    is it possibe?


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  3. #2  
    Brassica oleracea Strange's Avatar
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    A refrigerator is a heat pump: it takes the heat from inside the fridge and puts it into the radiator on the back (which is why it gets hot). This is also how air conditioners work. You can use the same principle in reverse to heat your house by pumping the heat from the air or ground outside.

    An oven works by turning electrical or gas energy directly into heat. There is no such thing as "coldness" to go anywhere.


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  4. #3  
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    my idea is close r to DOPING (as done in semiconductors) electrons and HOLES used!
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    please think theoritically only. i know this idea needs a lot to be called a s valid. but we can test it here.
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  6. #5  
    Brassica oleracea Strange's Avatar
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    There is no "coldness" associated with an oven.
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    lets call coldness as "absence of hotness"
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  8. #7  
    Brassica oleracea Strange's Avatar
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    OK. You can use the heat from a fridge to warm things up. That's it. An oven doesn't take the heat from elsewhere so you can't use it to cool something down.
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    Theoretically, you could make an oven that works on a heat pump principle by taking the heat from the refrigerator. This would be an extremely inefficient way to operate. The refrigerator works best when its condenser is at fairly cool temperature. It would not work well at all with a condenser at 350 F or whatever temperature it is that the oven is set to. Furthermore, the oven is not in continuous operation like the fridge.
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  10. #9  
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    If you’re interested in hybridizing a refrigeration system you should look into the magnetocaloric effect of gadolinium (Gd).
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    Quote Originally Posted by scinerd View Post
    If you’re interested in hybridizing a refrigeration system you should look into the magnetocaloric effect of gadolinium (Gd).
    kindly summarise for me. as i am not much scientific person, it will be very difficult for me to reach to the point where you are pointing.

    thanx
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  12. #11  
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    i can point some new hybrids. but it will be very difficult to advocate for them, as they will be purely imaginative.
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    Some is already done in some green homes. Refrigerator coils are sometimes repositioned to help heat a house in cold climates. The heat is too low to be useful for preparing food. Of course for most homes it just heats the kitchen.

    You don't get cold from heating at oven--it's an expendature of energy going toward heating the oven plus "waste" heat that's escaping through the door, walls etc.
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  14. #13  
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    Hi

    If a temperature difference exists energy can be extracted.

    If you add energy a temperature difference can be created.

    The greater the temperature difference the more energy you need to add.

    If you try to use the cold side for a frig and the hot part for an oven you will need lots of energy. Heat pumps are normally more effeicient than resistive heating.

    I doubt if the cold needed for the frig would match the heat needed for the oven. If a heat pump oven was possible to make both the frig and oven more efficient if the hot side outside the frig was would around the cold side from the oven. This would be your best bet. Maybe.

    I am not sure if it is possible to make a heat pump oven. It is possible to make a heat pump warmer. Engel makes a freezer/warmer, but it does not get that hot.

    http://www.engel-usa.com/index.php?p...mart&Itemid=59

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    Quote Originally Posted by Lynx_Fox View Post
    Some is already done in some green homes. Refrigerator coils are sometimes repositioned to help heat a house in cold climates. The heat is too low to be useful for preparing food. Of course for most homes it just heats the kitchen.

    You don't get cold from heating at oven--it's an expendature of energy going toward heating the oven plus "waste" heat that's escaping through the door, walls etc.
    Its called heat reclaim and grocery stores use it more than anyone. Reclaiming on the average about 300,000 to 400,000 MBH of heat from their frozen food and use it to heat the stores in the winter. In the summer they reject the heat. What would be a good idea is to some how do the opposite of what a microwave oven does and have a device that can slow molecules down. If we could instantly freeze things it would change everything. We wouldn't need refrigeration anymore.
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  16. #15  
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    Quote Originally Posted by precious View Post
    refrigrator makes hot things cold (where that heat goes?)
    oven makes cold thing hot ( where that coldness goes?)

    if we connect both of them, then the heat of refrigrator can be used for oven and coldness of oven can be used for refrigrator. without a lot of expenditure of energy.

    is it possibe?
    You're looking at this all wrong, aside from the lack of "coldness of oven" (all my ovens only have hot areas; I'm certain that yours are the same).

    Think about it this way:

    1) You need power to run a refrigerator.
    2) You need power to run an oven.

    You would need power to run both a refrigerator and an oven. And the second law of thermodynamics tells us that connecting an oven and refrigerator would not help (indeed, it would hurt, energy-wise).

    No free lunch.

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