Systems and methods for multi-stage refrigeration

A multi-stage refrigeration system, comprising:

• an eductor in fluid communication with a first vapor line and a liquid source;
• a flashdrum in fluid communication with the eductor, the flashdrum connected to a second vapor line, a liquid line at a bottom of the flashdrum and a two-phase fluid line;
• a first expansion valve directly connected to the liquid line and a chilled two-phase fluid line, which is downstream from the flashdrum and the first expansion valve;
• another flashdrum in fluid communication with the chilled two-phase fluid line and connected to the first vapor line;
• a pump positioned upstream of the eductor and in fluid communication with the liquid source,
• another liquid line connected to the another flashdrum;
• a second expansion valve in fluid communication with the another liquid line and connected to another chilled two-phase fluid line;
• an accumulator directly connected to a vaporized refrigerant line and a third vapor line;
• and
• another accumulator in fluid communication with the first vapor line, the second vapor line, the third vapor line and the eductor.