Abstract
High efficiency cryocoolers working below 10 K have many applications such as cryo-pump, superconductor cooling and cryogenic electronics. This paper presents a thermally coupled two-stage pulse tube cryocooler system and its numeric analysis. The simulation results indicate that temperature distribution in the pulse tube has a significant impact on the system performance. So a precooling heat exchanger is put inside the second stage pulse tube for a deep investigation on its influence on the system performance. The influences of operating parameters such as precooling temperature, location of the precooling heat exchanger are discussed. Comparison of energy losses apparently show the advantages of the configuration which leads to an improvement on the efficiency. Finally, the cryocooler is predicted to be able to reach a relative Carnot efficiency of 10.7% at 10 K temperature.
| Original language | English |
|---|---|
| Article number | 012071 |
| Journal | IOP Conference Series: Materials Science and Engineering |
| Volume | 171 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Mar 2017 |
| Externally published | Yes |
| Event | 26th International Cryogenic Engineering Conference, ICEC 2016 and International Cryogenic Materials Conference 2016, ICMC 2016 - New Delhi, India Duration: 7 Mar 2016 → 11 Mar 2016 |