Review of experimental research on Joule–Thomson cryogenic refrigeration system

Geng, Hong; Cui, Xiaoyu; Weng, Jianhua; She, Hailong; Wang, Wenqing

doi:10.1016/j.applthermaleng.2019.04.050

Cited by 40 publications

(9 citation statements)

References 70 publications

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“…Although the vast majority of published articles deal with pinning properties at the temperature of boiling nitrogen, pinning has the biggest impact at low temperatures (4 K), which are achievable by using liquid helium. Nevertheless, an increase of the pinning effect is noticeable even for higher temperatures [149,161] achievable more economically by various types of cryo-coolers [162][163][164][165]. This is important for applications in superconducting magnetic energy storage devices, motors, and generators which usually work in the range of 30-65 K and a mid-to-high magnetic field.…”

Section: Artificial Pinning Centers In Recbo Thin-film Superconductorsmentioning

confidence: 99%

Nanosized Pinning Centers in the Rare Earth-Barium-Copper-Oxide Thin-Film Superconductors

et al. 2020

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Since the discovery of high-temperature superconductivity, significant progress in the fabrication of REBCO-based (Rare Earth Barium Copper mixed Oxides) thin-films superconductors has been achieved. In our review, we described the approaches and possibilities of the improvement of superconducting properties by the introduction of nanosized pinning centers. We focused on the synthesis and viability of the material for artificial pinning centers and methods used for the introduction of the pinning centers into superconducting REBCO-based thin-films. This article summarizes available materials and procedures regardless of the financial cost of the individual method. According to available literature, the most significant superconducting REBCO tapes can be obtained when a combination of 1D and 0D nanoparticles are used for nanoscale pinning.

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Section: Artificial Pinning Centers In Recbo Thin-film Superconductorsmentioning

confidence: 99%

Nanosized Pinning Centers in the Rare Earth-Barium-Copper-Oxide Thin-Film Superconductors

et al. 2020

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“…Therefore, the study of JT pressure drop is important in an HX. 2,3 Many researchers 4,5 have presented an analytical method for multiple streams, one-dimensional HX to determine temperature distribution for all the fluids with an assumption that no multiple eigenvalues exist in the solution. The variety of configurations of a two-fluid HX available are tube-intube HX [6][7][8] and tube with a helical coil 9 ; and for a three-fluid HX, the two basic configurations are tube-in-tube HX 10 and tube-in-tube with a helical coil carrying the third fluid.…”

Section: Introductionmentioning

confidence: 99%

“…In a negative JT effect, there is a continuous rise in pressure accompanied by a continuous rise in temperature, which leads to decreased effectiveness. 2 Geng et al 3 made a review of numerous experimental studies, which considered JT cryogenic refrigeration systems. They considered different refrigeration components and the charge composition of mixtures for the study.…”

Section: Introductionmentioning

confidence: 99%

Joule–Thomson effect investigations on a cryogenic three‐fluid–three thermal communication heat exchanger

Chodankar¹,

Aswatha

Krishna

et al. 2021

Heat Trans

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The present study investigates the Joule-Thomson (JT) effect due to pressure drop on three-fluid heat exchangers (HXs) with three thermal communications. The increased miniaturization of cryogenic HXs has led to the introduction of the JT effect. The present study investigates JT effects on a three-fluid HX with three communications presenting different JT effects, which leads to a rise or drop in effectiveness values. The study is carried out using finite element analysis and MATLAB, considering seven nondimensional parameters of which one is JT pressure drop. The highest effectiveness is achieved for the positive JT effect at the hot stream. This improved effectiveness at hot fluid is achieved by maintaining the size (number of transfer units) of the HX more than 3.1, along with the ratio of the cold fluid heat capacity to the hot fluid heat capacity above 0.8 and the intermediate fluid temperature above 0.7.

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“…Many electronic devices (such as infrared detectors, semiconducting devices, and low-noise amplifiers) can benefit from operation at a lower temperature which results in lower thermal noise, higher speed, and longer life. [1][2][3] The attractive points of Joule-Thomson (J-T) coolers for cooling the electronics are no moving cold parts and easy miniaturization. 4 The regenerative structure is composed of single or double finned capillaries winding mandrel in general J-T cooler, so the mass-flow rate and cooling power are limited.…”

Section: Introductionmentioning

confidence: 99%

“…Over the past decade, the microchannel has been developed rapidly due to the advancement of micro-etching and other processing technologies. 10 Researchers have done some research on micromachined J-T coolers. [11][12][13][14] Most importantly, the microchannel with discontinuous pillars can weaken the axial heat conduction, ensure the pressure capacity, and they can increase the wall surface area, enhance the heat transfer rate.…”

Section: Introductionmentioning

confidence: 99%

Characterization of a distributed Joule‐Thomson effect cooler with pillars

et al. 2021

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The application of general Joule-Thomson (J-T) coolers in the integrated electronic equipment is limited by its compactness in the heat exchanger and cooling power (a few milliwatts to hundreds of milliwatts). However, the microchannel with pillars has many advantages, such as compact structure, tiny axial thermal conductivity, and large heat transfer area. Besides, when the pressure variation of the fluid is large in the microchannel, the distributed Joule-Thomson effect is generated significantly. Therefore, this study proposed a throttling and heat exchange structure, where heat transfer and throttling coexisted, and fabricated a laminated microchannel distributed J-T cooler with pillars utilizing the processing technology of printed circuit heat exchanger.The refrigeration performance concerning the cold-end temperature, cooling power, and temperature distribution was then investigated through experiments with two refrigerants (argon and nitrogen). The study implies that the temperature difference and cooling power of the cooler both increase with the rise of the inlet pressure with argon, the no-load cold-end temperature is 166.1 K, and the gross cooling power is 3.83 W at 5.20 MPa. The temperature of the cooler increases with the rise of heat load, while the parasitic heat load decreases. The cold-end temperature is 186.0 K, then the parasitic heat load and the gross cooling power are respectively 3.17 W and 7.17 W at 5.20 MPa under the heat load's condition of 4 W. Comparing the refrigeration performance of nitrogen and argon, the cold-end temperature of nitrogen at 5.20 MPa is 235.7 K, which is close to that of argon at 2.98 MPa. Whereas the cooling time of nitrogen is slightly shorter than that of argon, and the cooling power is 3.10 W, higher than that of argon. In addition, this study provides new insight into increasing the cooling power and reducing the application cost of miniature coolers.

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Review of experimental research on Joule–Thomson cryogenic refrigeration system

Cited by 40 publications

References 70 publications

Nanosized Pinning Centers in the Rare Earth-Barium-Copper-Oxide Thin-Film Superconductors

Nanosized Pinning Centers in the Rare Earth-Barium-Copper-Oxide Thin-Film Superconductors

Joule–Thomson effect investigations on a cryogenic three‐fluid–three thermal communication heat exchanger

Characterization of a distributed Joule‐Thomson effect cooler with pillars

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