HYBRID GIFFORD-McMAHON - BRAYTON EXPANDER

摘要

A hybrid expander for producing refrigeration at a cryogenic temperature includes a Brayton expander producing refrigeration at a first temperature; a GM expander producing refrigeration at a second temperature, the first temperature being colder than the second temperature, the second temperature being 200K or less. A high pressure line receives a gas from a compressor at a first pressure and supplies it at the first pressure to the Brayton expander and the GM expander simultaneously. A low pressure line returns the gas to the compressor at a second pressure from the Brayton expander and the GM expander, the first pressure being greater than the second pressure. The Brayton expander piston is attached to the cold end of the GM expander displacer and the Brayton expander piston and the GM expander displacer reciprocating together.

主权项

1. A hybrid expander for producing refrigeration at a cryogenic temperature, the hybrid expander comprising:
a Brayton expander producing refrigeration at a first temperature; a GM expander producing refrigeration at a second temperature, the first temperature being colder than the second temperature, the second temperature being 200K or less; a high pressure line for receiving a gas from a compressor at a first pressure and supplying it at the first pressure to the Brayton expander and the GM expander simultaneously; a low pressure line for returning the gas to the compressor at a second pressure from the Brayton expander and the GM expander, the first pressure being greater than the second pressure; wherein the Brayton expander piston is attached to the cold end of the GM expander displacer and the Brayton expander piston and the GM expander displacer reciprocating together.