Introduction[]
Apparently this calc is inaccurate because the ship Oven was on was infront of sunny, not behind it.
Credit goes for Captain Tourch for ponting out my mistake.
Caculation[]
All values are still the same but since the ship Oven was on is infront of Sunny I need to subtract that distance instead of adding it. Original calc is here: https://vsbattles.wikia.com/wiki/User_blog:Ugarik/Charlotte_Oven%27s_Hot_Sea_Hell
Low-End:
Distance between the furthest ship and Sunny is 1316 m
The distance between Oven and Sunny 504 m
1316-504 = 812 m - The distance between Oven and the furthest ship
Volume of the boiling water: V = (4/3*π*812^3)/2 = 1121312597.65 m^3
Mass: 1121312597650 kg
ΔT=90-20=70 C
Specific heat capacity of water is 4.186 J/g or 4186 J/kg
E = 1121312597650*70*4186 = 3.2856702*10^17 J
Note: I don't think the Low-End Value can be used since Wadatsumi was even further away yet still in boiling water.
High-End:
Distance to the horizon is 2800 m
Distance between Sunny and the screen 114 m
Distance between Oven and Sunny 504 m
So R = 2800-114-504 = 2182 m
V = (4/3*π*2182^3)/2 = 21758194386.3 m^3
Mass: 21758194386300 kg
E = 21758194386300*70*4186 = 6.3755861*10^18 J
Note: This value is much better since this range involves Wadatsumi and it was steaming everywhere to be seen
Final Results[]
Low-End:
3.2856702*10^17 J - 78.53 Megatons (City level+)
High-End:
6.3755861*10^18 J - 1.52 Gigatons (Large Mountain level)