Back to results
US 2019/0041126 A1Published application
Systems and Methods for Multi-Stage Refrigeration
AssigneeBechtel Hydrocarbon Technology Solutions, Inc.
InventorDavid Ladd
Life of this patent
Estimating the term…
Abstract
Systems and methods for multi-stage refrigeration in mixed refrigerant and cascade refrigeration cycles using one or more liquid motive eductors in combination with a pump.
Claims20
A multi-stage refrigeration system, comprising:
- an eductor in fluid communication with a first vapor line and one of a liquid source and a supercritical fluid source;
- a flashdrum in fluid communication with the eductor for receiving a two-phase fluid, the flashdrum connected to a second vapor line and a liquid line, wherein a pressure in the first vapor line is lower than a pressure in the second vapor line;
- a first expansion valve in fluid communication with the liquid line and connected to a chilled two-phase fluid line;
- another flashdrum in fluid communication with the chilled two-phase fluid line and connected to the first vapor line;
- and
- a pump positioned upstream of the eductor and in fluid communication with the one of the liquid source and the super-critical fluid source.
3 more elements
(canceled)
A method for multi-stage refrigeration, comprising:
- introducing one of a first liquid stream and a supercritical fluid stream into an eductor at a pressure of at least 600 psig;
- introducing a first vapor stream into the eductor to achieve partial liquefaction and produce a two-phase fluid stream comprising the first vapor stream and one of the liquid stream and the supercritical fluid stream;
- flashing the two-phase fluid stream to produce a second liquid stream and a second vapor stream;
- expanding the second liquid stream to produce a chilled two-phase fluid stream;
- and
- flashing the chilled two-phase fluid stream to produce the first vapor stream and a third liquid stream.
3 more elements
Dependencies are inferred from the claim text.