Mechanical Refrigeration Unit

Описание: For NGL Recovery units the Mechanical Refrigeration Unit is recommended for an inlet gas with a GPM C2+ higher than 4 (GPM means gallons per Mcf).

Ussualy as refrigerant it's used industrial propane meaning that the cold gas tempertaure could not be lower than -35°C considering a minimum approach temperature of 2-3°C.

Some highlights:

compressor type: screw or centrifugal

for screw type oil cooling is necessary and considering the site location the following are recommended: warm areas: use air cooler and for cold sites used oil injection to control the oil viscosity

usualy 2 stages are sufficient to provide the proper cooling of feed gas: to optimize the power consumptions try to set the same compression ratio for 1st and 2nd stage

the chiller type: kettle

min approach temperature shall be 2-3°C for a gas with operating temperature lower than -15°C and 5°C if operating T higher than -15°C

remember that the compressor outlet pressure is depending by available cooling fluid air/water and the industrial propane condensing temperature: take 10°C min approach between cooling fluid and refrigerant

check the refrigerant vaporization temperature to not obtain vacuum in compressor suction: aprox -37°C for industrial propane

from time to time purge the propane because shall be impurified and due to change in compossition the refrigeration is affected.

eBook:


https://lnkd.in/evN6h_w
https://lnkd.in/eF4KWM9
https://lnkd.in/eUcR2kk

With respect and joy to share free technical info,
Mihail

#innovation #sustainability #research #energy #training #technology #business #engineering #design #future