Significant Progress in Long-life 1 K Hybrid Cryocoolers Made by Boreas Cryogenics
Back
2021-03-10
Cryogenics in the ultra-low temperature range of 1-2 K and below will provide the necessary working environment for the rapidly developing quantum science and technology. The achievement of 1-2 K is crucial, as it forms the foundation of cryogenics for practical applications and it is the major challenge for further moving towards the sub-Kelvin and the mK temperature range. The theoretical and technical difficulties involved have remained at the cutting-edge of cryogenics for two decades.
The related theoretical and experimental verification results have been published in the international journal CRYOGENICS and IEEE Transactions on Applied Superconductivity.
Fig. 1. Schematic of set-up of the developed hybrid cryocooler.
Fig. 2. Linde-Hampson cycle of JTC in P-h thermodynamic plane.
Fig. 3. Steady state thermodynamic cycle of last stage CHEX, JT valve and evaporator in P-h plane.
Fig. 4. Deviation factor as a function of inlet stagnation pressure and temperature with a logarithmic abscissa.
.jpg)
Fig. 5. A prototype of a 1 K compact, lightweight and long-life hybrid cryocooler.
Based on the successful development of a four-stage high-frequency 3.3 K pulse tube cryocooler, we innovatively adopted a hybrid cryocooler by coupling a four-stage high-frequency regenerative cryocooler with a throttling cryocooler. This achieved an extremely-low temperature of 1 K, promoting the development of compact, lightweight, and long-life hybrid cryocoolers.
The related theoretical and experimental verification results have been published in the international journal CRYOGENICS and IEEE Transactions on Applied Superconductivity.
Fig. 1. Schematic of set-up of the developed hybrid cryocooler.
Fig. 2. Linde-Hampson cycle of JTC in P-h thermodynamic plane.
Fig. 3. Steady state thermodynamic cycle of last stage CHEX, JT valve and evaporator in P-h plane.
Fig. 4. Deviation factor as a function of inlet stagnation pressure and temperature with a logarithmic abscissa.
Fig. 5. A prototype of a 1 K compact, lightweight and long-life hybrid cryocooler.
Link 1: Article in the CRYOGENICS:
Link 2: Article in the IEEE Transactions on Applied Superconductivity:
Link 3: Article in the IEEE Transactions on Applied Superconductivity:
Back