Ammonia Absorption Refrigeration 1

[Nielse]

In heating a 30% aqua-ammonia solution from ambient to 200 deg C @400psi, would the RATE of ammonai gas production ( Vol/time) be constant, or would it vary as the temperature rises ???.

 

[stanlsimon]

The NH3 vapor pressure difference between the liquid phase and the vapor phase is what drives the diffusion. If you are designing an ammonia generator/ dephegmator, wouldn't you say that the operation temperature is constant? Maybe you are thinking about startup conditions.

Since the vapor pressures vary along with temperatures, it would be difficult to say that the diffusion rate would be constant.