MOELING A FAST COOLDOWN TECHNIQUE FOR PULSE TUBE CRYOCOOLERS
(0) Fast cooldown of cryocoolers is important for some applications, especially for military applications. Previously we proposed that the cooldown time of pulse tube cryocoolers can be decreased by reducing the size of the reservoir volume during initial cooldown and switching back to the normal volume when the temperature is nearing the desired cold temperature. Here we discuss the modeling of the fast cooldown technique to a temperature of 50 K and show that for relatively large pulse tube cryocoolers the cooldown time can be decreased by a factor of two or three compared to the normal pulse tube cryocooler with a fixed reservoir volume or with a Stirling cryocooler. This paper shows that the reduced reservoir volume decreases the impedance of the network consisting of the inertance tube and reservoir volume. The reduced impedance allows for a greater acoustic power flow through the regenerator and pulse tube, which leads to a greater refrigeration power.
Ray RADEBAUGH Agnes OGALLAGHER
National Institute of Standards and Technology 325 Broadway Boulder, CO 80305, USA
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）