Thermodynamical aspects of pulse tubes

Waele, A.T.A.M. de; Steijaert, PP Peter Paul; Gijzen, J.

doi:10.1016/s0011-2275(97)00015-5

Cited by 60 publications

(16 citation statements)

References 2 publications

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“…Neglecting the heat conduction term (this can be treated separately) Equation (31) in Ref. [26] reads…”

Section: Temperature Variationsmentioning

confidence: 99%

Basic Operation of Cryocoolers and Related Thermal Machines

Waele

2011

J Low Temp Phys

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This paper deals with the basics of cryocoolers and related thermodynamic systems. The treatment is based on the first and second law of thermodynamics for inhomogeneous, open systems using enthalpy flow, entropy flow, and entropy production. Various types of machines, which use an oscillating gas flow, are discussed such as: Stirling refrigerators, GM coolers, pulse-tube refrigerators, and thermoacoustic coolers and engines. Furthermore the paper deals with Joule-Thomson and dilution refrigerators which use a constant flow of the working medium.

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“…Neglecting the heat conduction term (this can be treated separately) Equation (31) in Ref. [26] reads…”

Section: Temperature Variationsmentioning

confidence: 99%

Basic Operation of Cryocoolers and Related Thermal Machines

Waele

2011

J Low Temp Phys

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“…Thermodynamical models [66], [77], [78] use the laws of thermodynamics to analyse the performance of a pulse tube. Such models are important for understanding the physical processes occurring in the pulse tube.…”

Section: Different Modelling Approachesmentioning

confidence: 99%

“…For about ten years pulse-tube refrigerators have been the main subject of research in the Low Temperature Physics Group at the Department of Applied Physics (TU/e). The group has unique expertise in the field and a substantial number of publications [73][74][75][76][77][78][79][80], [87], [90]. The previous PhD projects [28], [66], [69] were focused on the theoretical and the experimental aspects of pulse-tube refrigerators.…”

Section: Our Objectivesmentioning

confidence: 99%

“…Losses in the regenerator have been studied in [76][77][78]. Unfortunately, the losses in the tube are not as well known.…”

Section: Our Objectivesmentioning

confidence: 99%

“…An axial flow will commence which gradually approaches the steady Hagen-Poiseuille flow. The analytical solution, derived by Szymanski in 1932 [68], gives the deviation of u from the Hagen-Poiseuille flow at any time 77) where u max = −(dp/dz)R Fig. 3-14], are reproduced with our code.…”

Section: Starting Flow In a Circular Pipementioning

confidence: 99%

See 2 more Smart Citations

Numerical Simulation of Pulse-Tube Refrigerators

Lyulina

Mattheij²,

Tijsseling³

et al. 2004

International Journal of Nonlinear Sciences and Numerical Simulation

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Exergy destruction in the double inlet pulse tube cryocooler (DIPTC): A parametric study

Dash

Nandi

Das

2009

Int. J. Energy Res.

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SUMMARYIn this paper the exergy analysis of a double inlet pulse tube cryocooler (DIPTC) has been performed. The pulsating mass flow has been modelled by a sinusoidal approximation using phasor analysis. The corresponding values were used to find out the average exergy flow through and exergy destructions in various components. The effect of different parameters on the exergy flow and exergy destruction has been studied over a large range of parameters. The parameters considered here are frequency, cold end temperature, valve coefficients of orifice valve and double inlet (DI) valve, system average pressure and initial phase angle of compressor outlet pressure. A higher sensitivity of the losses in a DIPTC system is observed with operating frequency and initial phase angle of compressor pressure within some specific range of these parameters. It was observed that for a DIPTC system there is a critical cold end temperature below which the losses are significant and also there exists a critical frequency below which there will practically be no cooling. It was found that the losses in the DIPTC are more sensitive to the orifice valve opening in comparison to the DI valve opening. A Grassmann diagram has also been constructed for the DIPTC.

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Thermodynamical aspects of pulse tubes

Cited by 60 publications

References 2 publications

Basic Operation of Cryocoolers and Related Thermal Machines

Basic Operation of Cryocoolers and Related Thermal Machines

Numerical Simulation of Pulse-Tube Refrigerators

Exergy destruction in the double inlet pulse tube cryocooler (DIPTC): A parametric study

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