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

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Discussion Overview

The discussion centers on identifying a suitable working fluid for a waste heat recovery system, specifically one with a boiling point between 150-180 F. Participants are exploring options that are minimally flammable, preferably nontoxic, and have low environmental impact.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant requests recommendations for working fluids that meet specific criteria, including boiling point, flammability, toxicity, and environmental impact.
  • Another participant suggests starting with a Wikipedia page that lists refrigerants, advising to sort by boiling point and convert temperatures from Fahrenheit to Celsius.
  • A participant reiterates the initial request for fluids and asks for clarification on the working pressure and the rationale behind the specified boiling point range.
  • A later reply specifies that the working pressure will be at 1 ATM and mentions the possibility of using lower pressures with water to achieve boiling at a lower temperature. The participant explains that the boiling point range is chosen based on the relatively constant temperature in the facility for waste heat recovery.

Areas of Agreement / Disagreement

Participants have not reached a consensus on specific working fluids. There are multiple inquiries and suggestions, but no definitive recommendations have been made.

Contextual Notes

The discussion does not clarify the assumptions regarding the environmental impact criteria or the specific applications of the working fluids beyond the waste heat recovery context.

chemisthypnos
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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?
 
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chemisthypnos said:
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?
 
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.
 
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