The issue of selecting a refrigerant for the refrigeration system
Thread Content
Choose the refrigerant based on the different cooling levels: air cooling can be used for temperatures above 45°C； Choose cooling water at around 30C ； Choose chilling water around 10C ； For temperatures below 10C, choose liquid ammonia or cryogenic saline ； -For temperatures ranging from 10°C to -40°C, propylene compression expansion refrigeration is used; so what kind of refrigeration is used for temperatures below -40°C?
Dichloromethane and the like can be considered. For even lower temperatures, liquid nitrogen and similar options can be considered.
-To separate hydrogen from propane and propylene using deep cryogenic flash evaporation at 100°C, what should be chosen? Liquid nitrogen?
-To separate hydrogen from propane and propylene using deep cryogenic flash evaporation at 100°C, what should be chosen? Liquid nitrogen?
(⊙v⊙) Well, liquid nitrogen has an even lower temperature. Is it appropriate to use combined ethylene-propylene refrigeration here?