diathermic oil or steam

[mir]

Hi, I'll ask you a thermodynamic problem:
a. I have a pot warmed by a "camicia" where I have water vapor or diathermic oil (the classic bath heating).
b. of resistors heat the fluid in the "camicia"
c. My goal is to boil the liquid I have in the pot.

given the above are correct the following deductions:
1. if I use water vapor I have to work under pressure because I have to get at least 112/113 °c in my shirt
2. If I drain the water into the shirt I must consider that I must also provide energy for the change of state => if I use diathermic oil I can use lower power resistance because I do not have to change phase oil.

Am I wrong?

thank you guys for the help
♪

 

[Fulvio Romano]

1. if I use water vapor I have to work under pressure because I have to get at least 112/113 °c in my shirt

Why? Can't steam reach 112/113°C? You can heat the steam as much as you want, right?

2. If I drain the water into the shirt I must consider that I must also provide energy for the change of state => if I use diathermic oil I can use lower power resistance because I do not have to change phase oil.

If it is a continuous process I think you can overlook the first heating.
if it is a discontinuous process, your goal is to bring the carrier fluid to 112/113°c (I would use a dt greater...), apart from the latent heat, if you use water, you also have a thermal capacity greater than that of oil, do you think?
but then you also have a different heat exchange between steam-wall and oil-wall, do you think?

I think you're neglecting a lot of factors. .