That is a iterative process though. Fill it up, heat it, empty it, start over. Is it possible to heat the oil fast enough for it to be a continuous process?
Working on a project where we have been asked to utilize waste heat from a combustion process in order to increase the temperature of oil in a separate process. The hot air from combustion is at 340C
and the oil is at 22C with a target temperature of 65C I have not seen any hot air heat...