Quote:
Originally Posted by bojan
Perhaps the calc for power density should be done based on Solar constant (1.37kW/m2)...
OK, here is the calculation, based on Solar constant.
Their end number is right, 273mW/m3 (average across the whole Sun). However, something is not right with other numbers... .
Spreadsheet cal is attached...
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Yes, it should be possible to calculate from the solar constant.
My only comment to the spreadsheet is that the energy is only generated in the Sun's core, which is about 0.2 solar radii.
That then gives 34.18W/m3 power density in the core itself.
But still, imagine a cubic metre of super dense solar core plasma. It weighs 150 tonnes, and is at 14 million degrees. Would it only emit 34 watts - thats like a dim lightbulb??? Something's not right.