| 摘要 |
<p>A pulse tube system especially useful for producing and delivering refrigeration at very cold temperatures wherein a product fluid (42, 58) such as hydrogen is preferably precooled and then liquefied, subcooled and/or densified by heat exchange (4, 59) with ultra cold gas generated by a pulsing compression wave (1) which rejects heat into a cryogen fluid heat sink (8, 73).</p> |
