Searching for Low Impact Fluid with Boiling Point of 150-180 F

[chemisthypnos]

I am looking for a good working fluid whose boiling point is in the range of 150-180 F for a waste heat recovery system. The fluid should be minimally flammable, preferably nontoxic, and low in environmental impact. Does anyone know of any working fluids that match this description?

 

[Baluncore]

Start here; https://en.wikipedia.org/wiki/List_of_refrigerants
Sort the table by BP column.
Convert your F to C.
Read the middle of the table.

 

[Lnewqban]

I am looking for a good working fluid whose boiling point is in the range of 150-180 F for a waste heat recovery system. The fluid should be minimally flammable, preferably nontoxic, and low in environmental impact. Does anyone know of any working fluids that match this description?

What working pressure?
What is the reason for the boiling point range requirement?

 

[chemisthypnos]

The working pressure is going to be 1 ATM ( atmospheric pressure). I am also considering using pressure below ambient if water is the working fluid so it will boil at a lower temperature.

The reason for the boiling point range is that 150-180 F will be the relatively constant temperature in the facility that we want to use waste heat recovery on.