Lets see, lets assume that the
average weight of all the hypothetical cremation people is 70 pounds to account for all the kids dragging down the numbers. We'll assume that while they might be starved, they aren't buried in natron for thirty days prior to cremation to fully dry them. The average human is about 60% water, so we have about 42 pounds of water per theoretical corpse. To cremate the body we need to
at the very least bring that water from body temperature to total vaporization (after which the non-water parts may burn on their own or with negligible amounts of energy input). So lets do a little math:
Q=c⋅m⋅(100∘C−T)+Δhvap⋅m is our formula, where c is water's heat capacity, m is the mass of water, T is the starting temperate in C, and finally the specific enthalpy of vaporization of water (whats needed to kick the phase change from liquid to gas)
Remember, we need to not only bring the temperature up from body to boiling, then give enough energy to kick it over to steam, and for about 42 pounds of water that takes about 4901450 kilojoules.
So now we are at 4901450kj per body - how do we get energy to that?
Well we have options:
Energy in common materials available-
Coal | 1 pound | 9988kj |
Gasoline | 1 gallon | 126858kj |
Diesel | 1 gallon | 144945kj |
Crude Oil | 1 gallon | 142960kj |
Natl Gas | 1 cubic meter | 38000kj |
So
one body might take
490 pounds of coal, 39 gallons of gasoline, 34 gallons of diesel, 34 gallons of crude oil, or 129 cubic meters of natural gas.
Wikipedia claims that 1.1 million people were killed there, and if they were all cremated then that would have required over 27,000 tons of coal, over 120,000 barrels of fuel, and so on. These are insane amounts of fuel in a logistically starved Germany, and then of course you have to process and run the grinders and pulverize the remains, so the energy requirements are even higher.
This assumes perfect efficiency.
Which you're not going to get, even in the most modern designed and computer run crematorium.
Tell me you don't understand physics or even built a campfire without telling me, the post. Burning corpses together in piles is
less efficient because each one works as an insulator to the corpses around it. Tightly packed materials take longer to dehydrate or burn because all the heat energy must pass through the insulating materials before it can transfer to the central materials. The increased surface area and air flow not only give the heat more access to get
in, but the water to get
out.
Why do you think a tray of meat will cook faster than a whole-ass bird in your oven at home, dipshit?