CLC number:
On-line Access: 2025-02-28
Received: 2023-12-18
Revision Accepted: 2024-03-25
Crosschecked: 2025-02-28
Cited: 0
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Citations: Bibtex RefMan EndNote GB/T7714
Qinyu ZHAO, Jun CHENG, Yanrui ZHANG, Haoren WANG, Bo WANG, Ruize LI, Hua ZHANG, Zhihua GAN. Structural optimization of the rotary valve in a two-stage Gifford-McMahon-type pulse-tube cryocooler working at liquid helium temperatures[J]. Journal of Zhejiang University Science A, 2025, 26(2): 109-120.
@article{title="Structural optimization of the rotary valve in a two-stage Gifford-McMahon-type pulse-tube cryocooler working at liquid helium temperatures",
author="Qinyu ZHAO, Jun CHENG, Yanrui ZHANG, Haoren WANG, Bo WANG, Ruize LI, Hua ZHANG, Zhihua GAN",
journal="Journal of Zhejiang University Science A",
volume="26",
number="2",
pages="109-120",
year="2025",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2300638"
}
%0 Journal Article
%T Structural optimization of the rotary valve in a two-stage Gifford-McMahon-type pulse-tube cryocooler working at liquid helium temperatures
%A Qinyu ZHAO
%A Jun CHENG
%A Yanrui ZHANG
%A Haoren WANG
%A Bo WANG
%A Ruize LI
%A Hua ZHANG
%A Zhihua GAN
%J Journal of Zhejiang University SCIENCE A
%V 26
%N 2
%P 109-120
%@ 1673-565X
%D 2025
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2300638
TY - JOUR
T1 - Structural optimization of the rotary valve in a two-stage Gifford-McMahon-type pulse-tube cryocooler working at liquid helium temperatures
A1 - Qinyu ZHAO
A1 - Jun CHENG
A1 - Yanrui ZHANG
A1 - Haoren WANG
A1 - Bo WANG
A1 - Ruize LI
A1 - Hua ZHANG
A1 - Zhihua GAN
J0 - Journal of Zhejiang University Science A
VL - 26
IS - 2
SP - 109
EP - 120
%@ 1673-565X
Y1 - 2025
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2300638
Abstract: Gifford-McMahon-type pulse-tube cryocoolers (GM-PTCs) working at liquid helium temperatures are promising in quantum technology and cryogenic physics for their high reliability and minimal vibration. These features stem from the fact that there are no extra moving parts introduced into the system. The rotary valve is a key component in GM-PTCs that transfers the output exergy from the compressor to the cold head. Because a low Carnot efficiency of 1.58% is achieved at liquid helium temperatures, optimizing the rotary valve is crucial for improving the efficiency of GM-PTCs. In this regard, an exergy-loss analysis method is proposed in this paper to quantitatively obtain the leakage loss and viscosity loss of a rotary valve by experimental measurements. The results show that viscosity loss accounts for more than 97.5% of the total exergy loss in the rotary valve, and that it is possible to improve the structure of the rotary valve by expanding the flow area by 1.5 times. To verify the method, the cooling temperature and power of a remote two-stage GM-PTC were monitored, with original or optimized rotary valves installed. The experimental results show that compared to the original rotary valve, the optimized rotary valve can improve the cooling efficiency of a GM-PTC by 16.4%, with a cooling power of 0.78 W at 4.2 K.
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