| Mayhem - 3/28/2020 14:49
What is the purpose of an nh3 cooler?
Yes, it's to keep the NH3 liquid. Normally the pressure is lowered in the line from the tank (normal pressure drop through line friction) some liquid boils off causing accurate metering problems. If you could imagine small bubbles in the mix. That influences the turbine style meters used to measure product. The way the cooler works is the container around the pipework ahead of the meter actually purposely leaks a small amount of NH3 around the pipe cooling the pipe on the outside and maintaining it in the liquid state as it goes through the meter. That small amount is immediately at atmospheric pressure so it boils off quickly and in that state change from liquid to gas it absorbs surrounding heat thus cooling the product in the line. That little bit of product is then discharged almost as pure gas and directed into the ground so it's not wasted (even tho typically that small amount isn't metered).
Same refrigerant principle as what happens after the expansion valve in an air conditioning cycle.
|
Nh3 cooler
