Investigation on phase shifting for a 4 K Stirling pulse tube cryocooler with He-3 as working fluid

Qiu, Limin; Han, Lulu; Zhi, Xiaoqin; Dietrich, M.; Gan, Z.H.; Thummes, G.

doi:10.1016/j.cryogenics.2015.04.002

Cited by 22 publications

(2 citation statements)

References 11 publications

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“…However, for a heat load of less than 900 W, the relative Carnot efficiency exceeded 20%. The same trend occurred at a cold‐end temperature of 100 K. To meet the requirements of varying heat load at different cold‐end temperatures, many PTRs were developed for different capacities …”

Section: Introductionmentioning

confidence: 77%

“…The same trend occurred at a cold-end temperature of 100 K. To meet the requirements of varying heat load at different cold-end temperatures, many PTRs were developed for different capacities. [9][10][11][12] For changing parameters at the cold end (cold-end temperature and heat load), the operational behavior of a PTR varies from the optimal working conditions. Based on enthalpy phase modulation theory, Radebaugh discussed the effects of the mass flow, pressure wave, and phase angles at the cold end on the cooling performance of PTRs.…”

Section: Introductionmentioning

confidence: 99%

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Effects of cold‐end temperature and heat load on the cooling characteristics of a pulse tube refrigerator

Liu

Jiang

Ding

et al. 2019

Energy Science & Engineering

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A pulse tube refrigerator (PTR) was developed to operate at different cooling capacities to meet the requirements of various applications. Changes in the thermal loads or the long operating time of the PTR will influence the cold conditions (cold‐end temperature and heat load), leading to a deviation of the cooling performance from the optimal design conditions. The basic principles of the mass flow characteristics of the PTR are constructed based on enthalpy phase modulation, which is helpful for comprehending the relationships between cold‐end parameters and other parameters. A REGEN model is introduced in which different mass flows at the cold‐end are considered to simulate the effects of the cold‐end parameters on the performance of the regenerator. The influences of the cold‐end temperature and heat load on the cooling performance are investigated by using a coupling model of a DeltaEC model and a REGEN model. In addition, some experiments are performed on a PTR working at different cold‐end temperatures and heat load. The experimental results are in good agreement with the simulation results. The cooling performance of the PTR is influenced by the average pressure and operating frequency of different cooling states. Relative Carnot efficiencies of 12.2% for 4 W@60 K with a specific power of 33 W/W and 16.1% for 15 W @120 K with a specific power of 9 W/W can be achieved by the PTR using different operating parameters.

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Section: Introductionmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%