A miniature pulse tube refrigerator for temperatures below 100K

Kanao, Kenichi; Watanabe, Norihisa; Kanazawa, Yoshiaki

doi:10.1016/s0011-2275(05)80035-9

Cited by 67 publications

(14 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Therefore, the PTR is recognized as one of the most promising refrigerators in the future. Since the invention of the basic pulse tube refrigerator (BPTR) in the early 1960s [1], pulse tube refrigerator has experienced several significant structural improvements including the orifice pulse tube refrigerator (OPTR) [2], the double inlet pulse tube refrigerator (DIPTR) [3], the multi-stage pulse tube refrigerator [4] and most recently the inertance tube pulse tube refrigerator (ITPTR) [5]. All of these improvements have led to the technical progress of the PTR, and so far the lowest temperature attained by the pulse tube refrigerator has already reached about 1.3 K [6].…”

Section: Introductionmentioning

confidence: 99%

CFD analysis of thermodynamic cycles in a pulse tube refrigerator

et al. 2010

View full text Add to dashboard Cite

a b s t r a c tThe objectives of this paper are to study the thermodynamic cycles in an inertance tube pulse tube refrigerator (ITPTR) by means of CFD method. The simulation results show that gas parcels working in different parts of ITPTR undergo different thermodynamic cycles. The net effects of those thermodynamic cycles are pumping heat from the low temperature part to the high temperature part of the system. The simulation results also show that under different frequencies of piston movement, the gas parcels working in the same part of the system will undergo the same type of thermodynamic cycles. The simulated thermal cycles are compared with those thermodynamic analysis results from a reference. Comparisons show that both CFD simulations and theoretical analysis predict the same type of thermal cycles at the same location. However, only CFD simulation can give the quantitative results, while the thermodynamic analysis is still remaining in quality.

show abstract

Section: Introductionmentioning

confidence: 99%

CFD analysis of thermodynamic cycles in a pulse tube refrigerator

et al. 2010

View full text Add to dashboard Cite

show abstract

“…The modification on basic pulse tube made it suitable for lower cryogenic temperature started with the Orifice type followed by the double inlet orifice type cooler and then the inertance pulse tube cryocooler. This was first reported by Kano [1] and states that the variables can be controlled are flow impedance, the reservoir volume, the charge pressure and the frequency. Detailed analysis was carried out by de Boer [2] using a simple turbulent flow model.…”

Section: Pulse Tube Cryocoolersmentioning

confidence: 96%

Numerical analysis of inertance pulse tube cryocooler with a modified reservoir

Abraham

Damu

Kuzhiveli

2017

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

View full text Add to dashboard Cite

Abstract. Pulse tube cryocoolers are used for cooling applications, where very high reliability is required as in space applications. These cryocoolers require a buffer volume depending on the temperature to be maintained and cooling load. A miniature single stage coaxial Inertance Pulse Tube Cryocooler is proposed which operates at 80 K to provide a cooling effect of at least 2 W. In this paper a pulse tube cryocooler, with modified reservoir is suggested, where the reverse fluctuation in compressor case is used instead of a steady pressure in the reservoir to bring about the desired phase shift between the pressure and the mass flow rate in the cold heat exchanger. Therefore, the large reservoir of the cryocooler is replaced by the crank volume of the hermetically sealed linear compressor, and hence the cryocooler is simplified and compact in size. The components of the cryocooler consist of a connecting tube, aftercooler, regenerator, cold heat exchanger, flow straightener, pulse tube, warm heat exchanger, inertance tube and the modified reservoir along with the losses were designed and analyzed. Each part of the cryocooler was analysed using SAGE v11 and verified with ANSYS Fluent. The simulation results clearly show that there is 50% reduction in the reservoir volume for the modified Inertance pulse tube cryocooler.

show abstract

“…An alternative means of adjusting the phase between the pressure and mass flow rate is with an inertance tube, as reported by Kanao et al [5]. The inertance tube does not suffer from the same limitation as the orifice; through proper selection of the inertance tube geometry it is possible to force the mass flow rate to either lead or lag the pressure.…”

Section: Motivationmentioning

confidence: 99%

Experimental Investigation and Modeling of Inertance Tubes

Schunk

Nellis

Pfotenhauer

2005

Journal of Fluids Engineering

View full text Add to dashboard Cite

Three models describing and predicting the inertance effect in inertance tubes for pulse tube refrigerators are presented in this thesis. All models take the inertance, the compliance, and the resistance associated with oscillating gas flow in the inertance tube into account. The first model is based on electrical transmission line theory, the second is based on lumped components in which the resistance, compliance, and inertance are each To verify these models, the mass flow rate and pressure characteristics are measured for a number of different inertance tube geometries at different experimental conditions. The instantaneous pressure at various locations and the mass flow rate at the terminating end of the inertance tube can be measured relatively easily. The mass flow rate at the pulse tube end of the inertance tube presented a challenge and several techniques were used to measure this quantity. A commercially available, hot film anemometer was modified in order to measure the rather high mass flow into the inertance tube and withstand the high operating pressure.Unfortunately this modified anemometer failed to measure the true mass flow under oscillating flow conditions. Two methods of indirectly measuring the mass flow exiting the compressor were introduced. Although these two methods were shown to be capable of measuring the mass flow correctly under certain limiting conditions, they failed to accurately ii measure the mass flow rate consistently over a range of operating conditions. Therefore, the models are ultimately verified primarily through careful comparison with those quantities that can be easily and reliably measured; specifically the pressure variation along the length of the inertance tube and the mass flow rate into the reservoir. These experimental quantities are shown to be in good agreement with the model's predictions over a range of operating conditions.Design charts are generated with the experimentally verified, distributed component model and are presented for various operating conditions in order to ease the design of inertance tubes for pulse tube refrigerators with kW-level refrigeration power. These design charts enable the designer to select inertance tube geometry that achieves a desired phase shift for a given level of acoustic power.iii ACKNOWLEDGEMENTS

show abstract

A miniature pulse tube refrigerator for temperatures below 100K

Cited by 67 publications

References 1 publication

CFD analysis of thermodynamic cycles in a pulse tube refrigerator

CFD analysis of thermodynamic cycles in a pulse tube refrigerator

Numerical analysis of inertance pulse tube cryocooler with a modified reservoir

Experimental Investigation and Modeling of Inertance Tubes

Contact Info

Product

Resources

About