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HEAT vs TEMP

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Begger
Begger Posts: 569
in EggHead Forum
Heat and Temperature are 2 different things.   I really don't know how to explain the difference except by example.

A very heavy, massive object has lots of HEAT energy, regardless of temperature.  And with given amount of energy input, takes time to rise in temp.   
When I light my XL in a SINGLE place, it takes quite a while for the dome to get very hot.   If I light up in 4 places, it heats more quickly,(heat) but doesn't necessarily get HOTTER.(temperature)

No matter if I keep the dome to 250 for a slower cook or hotter, it seems to take ABOUT the same amount of time to cool.  Longer, of course, for higher temps, and if I could measure, I'm sure the ceramic IS hotter. (holding more HEAT energy.)

  
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  • Legume
    Legume Posts: 14,627
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    Ok.
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  • Nanook
    Nanook Posts: 846
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    Okie dokie
    GWN
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  • berndcrisp
    berndcrisp Posts: 1,166
    edited April 2015
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    That settles the long questioned principles of grilling a steak and smoking some primal. Thank you.
    Hood Stars, Wrist Crowns and Obsession Dobs!


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  • Phatchris
    Phatchris Posts: 1,726
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    Dude you just melted my face  :o
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  • Zmokin
    Zmokin Posts: 1,938
    edited April 2015
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    I presume no one really wants to hear a thermodynamics explanation, so I'll exercise some self-control.
    Large BGE in a Sole' Gourmet Table
    Using the Black Cast Iron grill, Plate Setter,
     and a BBQ Guru temp controller.

    Medium BGE in custom modified off-road nest.
    Black Cast Iron grill, Plate Setter, and a Party-Q temp controller.

    Location: somewhere West of the Mason-Dixon Line
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  • lousubcap
    lousubcap Posts: 32,396
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    Heat transfer and physics-kinda drive the Q circuit.  
    Enjoy your BGE and welcome aboard.
    Louisville; Rolling smoke in the neighbourhood. # 38 for the win.  Life is too short for light/lite beer!  Seems I'm livin in a transitional period.
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  • Begger
    Begger Posts: 569
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    Sorry, Folks.
    I'm a little (ok, a lot!) anal about some terms.    And usage.   People use 'heat' and 'temperature' almost interchangeably and they are NOT.  
    I used Thermocouples in High Temp furnaces for decades.   Up to 1200c =2192f .    Our thermocouples were given with a sheet calibrated at 1 degreee intervals so we could enter corrections into the furnace and be guaranteed a certain temperature.  

    And Yes, Berndcrisp, smoking IS primal.  
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  • Legume
    Legume Posts: 14,627
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    Oh man, we could've used that kind of language precision over on the devastation thread last night.  I think that threads pretty much played out now, so the issue is probably mute.
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  • theyolksonyou
    theyolksonyou Posts: 18,458
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    Never mind...
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  • TigerTony
    TigerTony Posts: 1,078
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    I'm pulling for Temp. I never did like the Heat.
    "I'm stupidest when I try to be funny" 
    New Orleans

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  • Hungry Joe
    Hungry Joe Posts: 1,567
    edited April 2015
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    Some folks here don't know whether to use dome or grate temp, now this?

    LOL, just kidding. You can never have to much knowledge, except this is a little above my pay scale.

    :):o   



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  • Zmokin
    Zmokin Posts: 1,938
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    Begger said:
    Sorry, Folks.
    I'm a little (ok, a lot!) anal about some terms.    And usage.  
    So am I, and I think understand what you are trying to say.

    Heat is energy.
    Temperature is a measurable property related to how much energy is stored in an item.  This energy is stored as the kinetic energy (vibrations) of the molecules/atoms of the material.  Different materials can have the same temperature, but be storing different amounts of energy.

    IOW, the same amount of heat will not make all items become the same temperature.  The higher the "Specific Heat" of an item, the more energy it takes to raise 1 lb of that substance 1 degree in temperature.

    e.g.  it takes about 10 times as much heat energy to raise a lb of water one degree as it takes to raise a lb of iron one degree.

    Large BGE in a Sole' Gourmet Table
    Using the Black Cast Iron grill, Plate Setter,
     and a BBQ Guru temp controller.

    Medium BGE in custom modified off-road nest.
    Black Cast Iron grill, Plate Setter, and a Party-Q temp controller.

    Location: somewhere West of the Mason-Dixon Line
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  • theyolksonyou
    theyolksonyou Posts: 18,458
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    Ok, I'm an engineer, but damn, my eyes are bleeding here.
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  • Canugghead
    Canugghead Posts: 11,534
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    you can stick your hand comfortably into a 212F oven, try that with a pot of water at 212F  =)
    canuckland
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  • clifkincaid
    clifkincaid Posts: 572
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    I lay my hands upon thee green stone...if I move them quick it's hot. If I keep them there it is warm. When I rub her all over I might find a cold spot. 
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  • bud812
    bud812 Posts: 1,869
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    I need another bowl.

    Not to get technical, but according to chemistry alcohol is a solution...

    Large & Small BGE

    Stockton Ca.

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  • Begger
    Begger Posts: 569
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    Zmokin said:
    Begger said:
    Sorry, Folks.
    I'm a little (ok, a lot!) anal about some terms.    And usage.  
    So am I, and I think understand what you are trying to say.

    Heat is energy.
    Temperature is a measurable property related to how much energy is stored in an item.  This energy is stored as the kinetic energy (vibrations) of the molecules/atoms of the material.  Different materials can have the same temperature, but be storing different amounts of energy.

    IOW, the same amount of heat will not make all items become the same temperature.  The higher the "Specific Heat" of an item, the more energy it takes to raise 1 lb of that substance 1 degree in temperature.

    e.g.  it takes about 10 times as much heat energy to raise a lb of water one degree as it takes to raise a lb of iron one degree.

    Yes, given that the mass of the egg is pretty constant across EACH model, temp is the way to go.    Mass x temp should equal some net energy.
    But don't forget that whether your dome temp is at  220f or 500f, the temp of the burning charcoal is about the same.   Just so darn much MORE of it at the higher dome temp.   

    And yes, isn't alcohol a WONDERFUL chemical solution?   And even philosophically, it may be a solution!    Fancy THAT!
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  • theyolksonyou
    theyolksonyou Posts: 18,458
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  • ksmyrl
    ksmyrl Posts: 1,050
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    And I had 6 PhDs for dinner...but this never came up?
    Fish, Hunt, Cook....anything else?

    1LBGE, 1MMBGE, somewhere near Athens GA
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  • theyolksonyou
    theyolksonyou Posts: 18,458
    edited April 2015
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    ksmyrl said:
    And I had 6 PhDs for dinner...but this never came up?
    How'd you cook em?  Raised direct?
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  • Legume
    Legume Posts: 14,627
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    I'm pretty sure dogs go into heat, but their temperature doesn't change, so they must be different.
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  • ksmyrl
    ksmyrl Posts: 1,050
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    "Clarice, I do wish we could chat longer, but I'm having an old friend for dinner"
    Fish, Hunt, Cook....anything else?

    1LBGE, 1MMBGE, somewhere near Athens GA
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  • Eggcelsior
    Eggcelsior Posts: 14,414
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    Heat is a "thing".

    Temperature is the measurement of a "thing".

    Now, that was easy.
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