I am creating a superhuman that can raise her overall body temperature to 3,000 °F (1648.889 °C) but I need to know the exact requirements of how that could happen.
Let's say this superhuman could regulate her body temperature emotionally. She is heat and shock resistant internally and externally. I've already decided that I want to implement her heart into this design. By raising her blood pressure to extremes she can produce heat.
However, that is not the only thing that can raise body heat nor can a body rely on this one function. If she could rely on this function what would the requirements be? Say her heart had extra chambers for heating and distributing blood or even a second heart... or could she even rely on heated blood alone? And if the heart option is even possible, how many BPMs would it take for her to reach 3,000 °F?
(this superhuman's powers are entirely genetic. She has genetic mutations so she is not a classic superhero... like a quirk if anyone knows what that is... this is not supposed to be a realistic superpower I just wish to know the possible requirements... she is not immune to overheating)
3,000 °F is her limit. She only needs to get to 400 °C to ignite an explosive known as potassium nitrate in her sweat. She also only needs to get to 400 °C briefly.
(I am ignoring fuel intake and physical immunity for now... there are other factors in her superpower but I am more focused on how she can raise her overall heat)