A pulse tube cryocooler with a cold reservoir

Zhang, X.B.; Zhang, K.H.; Qiu, Limin; Gan, Z.H.; Shen, Xiaoli; Xiang, Siliang

doi:10.1016/j.cryogenics.2012.12.001

Cited by 2 publications

(3 citation statements)

References 9 publications

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“…de Boer used the cold‐end parameters as one of the most important references while optimizing the cooling performance of regenerative cryocoolers. In all thermodynamic analyses of PTRs, the parameters at the cold end (mass flow, pressure wave, and phase angle) are indispensable and important components . As discussed in the above survey, the effects of the cold‐end parameters on the performance of the regenerator and the cooling capacity need to be investigated in detail to design an efficient PTR.…”

Section: Introductionmentioning

confidence: 99%

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: 99%

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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“…For the simplicity of calculations they took it as trapezoidal variation with time. Recently, CFD models are more popular because of its complexity geometry and it takes more computation time compare to thermodynamic models [8,9,10] developed a two-dimensional computational fluid dynamic (CFD) simulation of a GM type double inlet pulse tube refrigerator (DIPTR), operating under a variety of thermal boundary conditions analyzed by using commercial CFD package to model the oscillating flow inside a pulse tube refrigerator to predict the performance. Chen et al [11] studied the thermodynamic cycles in an instance tube pulse tube refrigerator (ITPTR) by means of CFD techniques.…”

Section: Introductionmentioning

confidence: 99%

“…Dai et al [14] developed model to investigate the three dimensional oscillating flow and heat transfer in the pulse tube and heat exchangers of a pulse tube refrigerator. Zhang et al [9] developed a linear model for theoretical analyses for the orifice and double-inlet PTCs that indicates the cooling performance can be improved by introducing the cold reservoir. Park et al [15] also analyzed to identify loss mechanisms with the simple numerical computation (linear model) followed by Zhang et al [16] which considers the dynamic characteristics of the cold linear compressor with thermo-hydraulic governing equations for each of sub components of the PTR.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Modeling of a Pulse Tube Refrigeration System

Roy¹,

Kundu²

2017

Journal of Thermal Engineering

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Thermodynamic model of the pulse tube refrigeration (PTR) system has been developed based on the ideal gas behaviour to study the cooling effect at the cold end of the refrigerator. Compression and expansion processes of the gas column have been assumed to be isothermal. Mass flow in the regenerator has been evaluated through Ergun's law. Mass flow through the orifice and double inlet valve has been assumed a nozzle flow with a correction factor. Model predicted results have been validated with in-house experimental results as qualitative basis. Model predicted results in compression and expansion processes are also validated with that of the experimental data. Model predicted results are presented to understand the basic phenomenon for the refrigeration effect in various pulse tube refrigerators (BPTR, OPTR and DIPTR). Time duration for expansion process is more than the compression process in case of OPTR and DIPTR, which leads to lower pressure during the expansion and more cooling capacity obtained compared to the BPTR. A distinct comparison among three types of PTRs has been done based on the work done at the cold end. It has been clearly observed that a DIPTR shows better cooling capacity compared to OPTR or BPTR.

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A pulse tube cryocooler with a cold reservoir

Cited by 2 publications

References 9 publications

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

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

Thermodynamic Modeling of a Pulse Tube Refrigeration System

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