yeah 110 ft^2 is alot of surface area now that im looking into heat transfer coefficients im getting alot more relevant heat xchanger info.
one thing i think is weird, based on engineering tool box,
Liquids and Fluids - Specific Heats
alot of hydrocarbons have a very close to equal specific heat, obviously there is some variance, but its very close to equal across the board
im going to run some more numbers, anyone else that wants to give it a stab feel free!
ill post some more sketches and numbers when im done thanks