Coaxial Stirling pulse tube cryocooler with active displacer

Abolghasemi, Mohammad Amin; Rana, Hannah; Stone, Richard; Dadd, Mike; Bailey, Paul B.; Liang, Kun

doi:10.1016/j.cryogenics.2020.103143

Cited by 16 publications

(6 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For active displacer pulse tube refrigerators (ADPTRs), Shi [11] firstly made the study of PTR with a rod-type displacer experimentally and achieved a no-load temperature of 38.9 K, which verified the feasibility of this phase-shift structure and has now gained a wide range of applications in coaxial PTRs [12,13], two-stage PTRs [14][15][16], hybrid Stirling/pulse tube refrigerators [17,18], etc. The displacer as phase shifter can achieve the function of effectively improving the cooling performance of the refrigerator compared with the traditional phase-shift method.…”

Section: Introductionmentioning

confidence: 94%

“…The mechanism study of the ADPTR can provide a direction for the improvement of its cooling performance, based on which, scholars have performed a lot of optimization work for their structural parameters, such as the displacement of the displacer and phase angle between piston of the compressor and displacement of the displacer [12], the frequency and key parameters of displacer [20], and the length of pulse tube and regenerator [13] in recent years. However, the current optimization method applied to the ADPTR is based on the linear variation of the optimization target with each operating parameter, which may not be so ideal in practice and presents a more complex variation pattern making the optimization more difficult.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study on Phase-Shift Mechanism and Kriging-Based Global Optimization of the Active Displacer Pulse Tube Refrigerators

et al. 2023

View full text Add to dashboard Cite

Pulse tube refrigerators are widely used in certain special fields, such as aerospace, due to their unique advantages. Compared to a conventional phase shifter, the active displacer helps to achieve a higher cooling efficiency for pulse tube refrigerators. At present, the displacer is mainly studied by one-dimensional simulation, and the optimization method is not perfect due to its poor accuracy, which is not conducive to obtaining a better performance. Based on the current status of displacer research, phase-shift mechanisms of inertance tube pulse tube refrigerators and active displacer pulse tube refrigerators were firstly studied comparatively by multidimensional simulation, and then we determined the crucial effect properties that lead to a better cooling performance for the active displacer pulse tube refrigerator at different cooling temperatures. Finally, an efficient optimization method combining the Kriging model and genetic algorithm is proposed to further improve the cooling performance of the active displacer pulse tube refrigerator. The results show that the active displacer substantially improves the cooling performance compared to the inertance tube mainly by increasing the PV power and enthalpy flow in the pulse tube. The Kriging agent models of active displacer pulse tube refrigerator achieve 98.2%, 98.31%, 97.86%, and 97.32% prediction accuracy for no-load temperature, cooling capacity, coefficient of performance, and total input PV power, respectively. After optimization, the no-load temperature is minimally optimized for a 23.68% reduction compared to the initial one with a relatively high efficiency, and the founded optimization methods can also be weighted for multiple objectives, according to actual needs.

show abstract

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Study on Phase-Shift Mechanism and Kriging-Based Global Optimization of the Active Displacer Pulse Tube Refrigerators

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Stirling engines are used in multiple applications such as solar power generation [5,6], computer chip cooling [7], submarines [8], the domestic use of heat and power [9], vehicles [10,11], and the Stirling cryocooler [12]. Said engine comes in a variety of types and shapes; however, its basic shape known as a Low-Temperature Differential (LTD) gamma type Stirling engine is used in the research (refer to Figure 1).…”

Section: Stirling Engine Applicationsmentioning

confidence: 99%

Effect of Material Change on Stirnol Engine: A Combination of NiTiNOL (Shape Memory Alloy) and Gamma Stirling Engine

et al. 2023

View full text Add to dashboard Cite

Population explosion, industrialization, and urbanization have accelerated energy requirements across the globe. This has led to the human quest to find simple and cost-effective energy solutions. A promising solution is the revival of the Stirling engine with the addition of Shape Memory Alloy NiTiNOL in it. The experimental results reveal that the addition of a NiTiNOL spring at the base plate of the Stirling engine enhances the overall efficiency of the engine, demonstrating some impact of the shape memory alloy toward the performance output of the Stirling engine. The newly modified engine has been named the STIRNOL ENGINE. The comparative study of Stirling and Stirnol engines reveals a minuscule efficiency improvement, yet there is a furtherance that opens a window for future researchers to get a lead and venture into this new field. We are confident that with more complex designs and better Stirling and NiTiNOL combinations, more efficient engines can be invented in the future. This research focuses on changing the material of the base plate of the Stirnol engine and ascertaining its performance differential through the integration of the NiTiNOL spring. A minimum of four types of materials are utilized for experimentation.

show abstract

“…The displacement of displacer and the phase difference between compressor and displacer can be adjusted to change phase modulation ability, so that the refrigeration performance can be changed. The best phase effect can be obtained by adjusting [10] . The displacement of displacer can change the phase difference between the pressure wave and the volume flow in the second stage cold finger.…”

Section: Influence Of Active Displacermentioning

confidence: 99%

An 880 mW@15 K thermal coupled pulse tube cryocooler with active phase shifter

Yin

Liu

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

A two-stage Stirling-type pulse tube cryocooler (SPTC) operating in 15 K is developed in our lab for cooling infrared detectors and precooling helium JT cryocooler. For easy adjustment, the driven compressor of the SPTC is designed as two independent linear compressors. The second stage cold finger uses an active warm displacer (AWD) as phase shifter to maximize the cooling performance. The variation of pre-cooling temperature and swept volume of the AWD will influence the cooling capacity of the SPTC. The cooling performance are experimentally tested and analyzed. With the pre-cooling temperature of 80 K, the second stage cold finger can obtain 470 mW at cooling temperature of 15 K with a total electric input power of 363 W. It can also obtain 880 mW at cooling temperature of 15 K with full input power of 527 W. A no-load temperature of 9.9 K can be obtained with an electric power of 180 W and 170 W for first and second stage. The experimental results also show that there exists an optimal pre-cooling temperature and swept volume of the AWD to achieve the maximum cooling capacity for 20 K applications.

show abstract

Coaxial Stirling pulse tube cryocooler with active displacer

Cited by 16 publications

References 14 publications

Study on Phase-Shift Mechanism and Kriging-Based Global Optimization of the Active Displacer Pulse Tube Refrigerators

Study on Phase-Shift Mechanism and Kriging-Based Global Optimization of the Active Displacer Pulse Tube Refrigerators

Effect of Material Change on Stirnol Engine: A Combination of NiTiNOL (Shape Memory Alloy) and Gamma Stirling Engine

An 880 mW@15 K thermal coupled pulse tube cryocooler with active phase shifter

Contact Info

Product

Resources

About