Most of the current Stirling-type pulse tube refrigerators (PTRs) adopt inertance tubes with
large reservoirs for phase shifting. Recovering the acoustic power dissipated in the …

Expansion work is generally wasted as heat in a pulse-tube cryocooler and thus represents
an obstacle to obtaining higher Carnot efficiency. Recovery of this dissipated power is …

A pulse tube cryocooler (PTC) cannot work with Carnot efficiency due basically to the
expansion work that has to be dissipated thermally at the warm end of the pulse tube, this …

Displacer type pulse tube refrigerator (DPTR) can get high efficiency with strong phase
shifting and acoustic work recovery to advantages. However, the optimal match of gas …

A new type series inertance tube pulse tube refrigerator is introduced. It includes series cold
heads. Each cold head's pulse tube connects an inertance tube as phase shifter. The …

On the basis of traditional single stage pulse tube cooler, a cascade pulse tube cooler is
designed and fabricated which includes a primary and a secondary stage pulse tube cooler …

Theoretical analysis shows that, for the cascade pulse tube configuration, its ideal cooling
efficiency could possibly approach Carnot efficiency. A cascade pulse tube cooler with a …