great example. I am short on time right now but I think this is a case of convection and conduction being a much more efficient way of transferring heat. as well there is 1000w heater putting the power through much less than 1 m2. and thirdly there is the matter of emissivity, what wavelengths a material preferentially absorbs. as a kid I hated chrome doorhandles on sunny summer days.
please be careful when saying or even implying what I have said. you have distorted my position almost every time in the past, so please just make an actual quote of my words, preferably with the context. as far as Spencer, do you disagree that the temperature of an object is not only affected by the energy input but also by the energy loss?
I can tell you were too much in a hurry, because I never said there was a 1000 watt heater in the BBQ, I said a 500 watt heater.
Most BBQ`s resemble a cube with rounded edges and cubes have 6 sides, my BBQ is no exception. So the "1000 watts and less surface" argument was a slip-up I attribute to you being in a hurry,...or as you put it "
I am short on time right now".
Take all the time you need and think about it when you are not too busy answering somebody else.
A 500 watt heater inside a metal cube (a BBQ) radiates heat in all directions except a little less through it`s own base down to the BBQ bottom. So if anything the radiation energy flux to the surfaces that face the sun is less with the 500 watt heater than what the same surfaces get from 1000 watts/ m^2 from solar.
If you don`t like the BBQ with the 500 watt heater inside...which is pretty well the same arrangement as Roy Spencer`s heated bar...with an internal electric heater then try it out with a 1 m^2 piece of sheet metal on top of a 500 watt electric heater.
After 5 minutes you won`t be able to pick up that sheet metal without wearing gloves...not even at the edges....they are sizzling hot.
Not so the same piece of sheet metal even if it`s black and laid for over an hour in the noon sun.
We`ll talk about it after "numan" shuts up...he can`t even figure out how many watt seconds a 500 watt heater delivers in 5 minutes and argues that the inside of the thin gauge metal lid is way hotter than the outside, because the 500 watt heater was inside.
We have been around this bend last year when I told you to be cautious with your acquired habit to equate radiation flux Joules into 100 % heat...after you read Roy Spencer`s "thought experiment".
That 100% radiation absorption and conversion to heat only happens in theory with a theoretical black body of a non specified material and mass, a non specified specific heat and in a vacuum
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Well, even for the arctoid from the mental wastelands of Canada, that last posting was remarkably doltish!
First of all, his figures were wrong, but putting that aside, the obvious difference between the cover of the barbeque and the situation of the hot plate inside the barbeque is that air is constantly removing heat from the lid by convection and the heat of the hot plate is contained inside the barbeque!!!
Moreover, how similar, how very similar the way heat is built up inside the barbeque is to the back radiation from the atmosphere to the earth!!!
Idiocy like this is unimaginable to mere mortals -- it takes a genius of the absurd like bear-brain and his fellow Denialists to come up with something this nuts!!
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Hey "numan"...if you connect 2 light bulbs 100 watts each in series how many watts worth of light will they radiate ?...Including "back radiating" each other inside a mirror sphere ?
Did it get as bright as a single 100 watt bulb ?
Or as dim as you, together with your nuclear admiral friend, the expert on black bodies, who had no idea why heat sinks are painted black.