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Advances in cryogenic engineering最新文献

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DEVELOPMENT OF NEW COOLING SYSTEM USING GM/JT CRYOCOOLERS FOR THE SKS MAGNET 采用gm / jt制冷机研制新型SKS磁体冷却系统
Advances in cryogenic engineering Pub Date : 2008-03-27 DOI: 10.1063/1.2908567
K. Aoki, T. Haruyama, Y. Makida, O. Araoka, K. Kasami, T. Takahashi, T. Nagae, Y. Kakiguchi, M. Sekimoto, T. Tosaka, H. Miyazaki, T. Kuriyama, M. Ono, T. Orikasa, T. Tsuchihashi, Y. Hirata
{"title":"DEVELOPMENT OF NEW COOLING SYSTEM USING GM/JT CRYOCOOLERS FOR THE SKS MAGNET","authors":"K. Aoki, T. Haruyama, Y. Makida, O. Araoka, K. Kasami, T. Takahashi, T. Nagae, Y. Kakiguchi, M. Sekimoto, T. Tosaka, H. Miyazaki, T. Kuriyama, M. Ono, T. Orikasa, T. Tsuchihashi, Y. Hirata","doi":"10.1063/1.2908567","DOIUrl":"https://doi.org/10.1063/1.2908567","url":null,"abstract":"We plan to develop a new improved cooling system for the Superconducting Kaon Spectrometer (SKS) magnet and transfer the magnet to the K1.8 beamline of the Hadron Hall of the Japan Proton Accelerator Research Complex (J-PARC) for further use in nuclear physics experiments. To replace the present 300 W cryogenic system, we will adopt a new cooling method that uses 4 K Gifford-McMahon/Joule-Thomson (GM/JT) cryocoolers. In order to decide a practical design for the new liquid helium reservoir of the magnet, which will be equipped with GM/JT cryocoolers, cooling tests on a GM/JT cryocooler were performed from February to March 2007. We constructed a new cooling test stand with a GM/JT cryocooler and measured the cooling capacities under several thermal shield temperatures with or without a baffle, which helped prevent convection. Based on the test results, we have finally decided to adopt three GM/JT cryocoolers for the new SKS along with a baffle and an additional dedicated GM cooler to cool the thermal shield of the GM/JT ports.","PeriodicalId":80359,"journal":{"name":"Advances in cryogenic engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1063/1.2908567","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58365148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
A NUMERICAL ANALYSIS IN LN2 CHANNEL FOR DC-SC POWER TRANSMISSION LINE 直流-直流输电线路ln2通道的数值分析
Advances in cryogenic engineering Pub Date : 2008-03-27 DOI: 10.1063/1.2908668
A. Sasaki, M. Hamabe, T. Famakinwa, S. Yamaguchi, A. Radovinsky
{"title":"A NUMERICAL ANALYSIS IN LN2 CHANNEL FOR DC-SC POWER TRANSMISSION LINE","authors":"A. Sasaki, M. Hamabe, T. Famakinwa, S. Yamaguchi, A. Radovinsky","doi":"10.1063/1.2908668","DOIUrl":"https://doi.org/10.1063/1.2908668","url":null,"abstract":"In Chubu University, bellows pipes are applied to absorb the heat shrink as a part of straight pipes for superconducting power transmission lines (SC PT). In conventional SC PT systems, SC cables are put in corrugated pipe. Pressure drop of the liquid nitrogen flow in bellows and corrugated pipes are analyzed by a fluid-analysis software. Pressure drop per unit length in the bellows and corrugated pipes is respectively 2.6 and 3.7 times that in the straight pipes. Pressure drop in the bellows is smaller than that in the corrugated pipes. Therefore, bellows are preferable for the DC-SC PT.","PeriodicalId":80359,"journal":{"name":"Advances in cryogenic engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1063/1.2908668","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58365661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Analyzing the Use of Gaseous Helium as a Pressurant with Cryogenic Propellants with Thermodynamic Venting System Modelling and Test Data 利用热力学排气系统模型和试验数据分析气体氦作为低温推进剂的加压作用
Advances in cryogenic engineering Pub Date : 2008-03-27 DOI: 10.1063/1.2908511
A. Hedayat, S. L. Nelson, L. Hastings, R. Flachbart, D. Vermilion, S. Tucker
{"title":"Analyzing the Use of Gaseous Helium as a Pressurant with Cryogenic Propellants with Thermodynamic Venting System Modelling and Test Data","authors":"A. Hedayat, S. L. Nelson, L. Hastings, R. Flachbart, D. Vermilion, S. Tucker","doi":"10.1063/1.2908511","DOIUrl":"https://doi.org/10.1063/1.2908511","url":null,"abstract":"Cryogens are viable candidate propellants for NASA's Lunar and Mars exploration programs. To provide adequate mass flow to the system's engines and/or prevent feed system cavitation, gaseous helium (GHe) is frequently considered as a pressurant. A Thermodynamic Venting System (TVS) is designed to maintain tank pressure during low gravity operations without propellant resettling. Tests were conducted in the Marshall Space Flight Center (MSFC) Multi-purpose Hydrogen Test Bed (MHTB) to evaluate the effects of GHe pressurant on pressure control performance of a TVS with liquid hydrogen (LH2) and nitrogen (LN2) test liquids. The TVS used comprises a recirculation pump, a Joule-Thomson (J-T) expansion valve, and a parallel flow concentric tube heat exchanger combined with a longitudinal spray bar. A small amount of liquid extracted from the tank recirculation line was passed through the J-T valve and then through the heat exchanger, extracting thermal energy from the bulk liquid and ullage and thereby enabling ...","PeriodicalId":80359,"journal":{"name":"Advances in cryogenic engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1063/1.2908511","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58365395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
THERMAL CONDUCTIVITY OF POWDER INSULATIONS BELOW 180 K 粉末绝缘材料在180 k以下的导热系数
Advances in cryogenic engineering Pub Date : 2008-03-27 DOI: 10.1063/1.2908672
M. Barrios, Yeon Suk Choi, S. V. Sciver
{"title":"THERMAL CONDUCTIVITY OF POWDER INSULATIONS BELOW 180 K","authors":"M. Barrios, Yeon Suk Choi, S. V. Sciver","doi":"10.1063/1.2908672","DOIUrl":"https://doi.org/10.1063/1.2908672","url":null,"abstract":"We have measured the thermal conductivity of aerogel beads and glass microspheres at average temperatures ranging from 30 K to 180 K. The measuring device consists of two closed, concentric cylinders suspended inside of a vacuum insulated cryostat. The insulation being tested occupies the annular space between the cylinders. A single stage Gifford-McMahon cryocooler, thermally anchored to the outer cylinder, cools the apparatus to a desired temperature range. A heater mounted on the inner cylinder generates uniform heat flux through the insulating material between the two cylinders. During each measurement, a temperature difference of roughly 10 K across the insulation is maintained. Fourier's law of heat conduction is used to relate the temperature difference between the two cylinders and the applied heating power to a bulk effective thermal conductivity of the powder insulation. Data were collected for aerogel beads between 30 K and 80 K and for glass bubbles between 30 K and 180 K. Results are compared...","PeriodicalId":80359,"journal":{"name":"Advances in cryogenic engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1063/1.2908672","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58365730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
FAST RESPONSE TEMPERATURE MEASUREMENTS IN STIRLING CYCLE CRYOCOOLER COMPONENTS 斯特林循环制冷机组件的快速响应温度测量
Advances in cryogenic engineering Pub Date : 2008-03-27 DOI: 10.1063/1.2908536
K. Kar, M. Dadd, P. Bailey, C. Stone
{"title":"FAST RESPONSE TEMPERATURE MEASUREMENTS IN STIRLING CYCLE CRYOCOOLER COMPONENTS","authors":"K. Kar, M. Dadd, P. Bailey, C. Stone","doi":"10.1063/1.2908536","DOIUrl":"https://doi.org/10.1063/1.2908536","url":null,"abstract":"One reason that heat transfer processes are not well understood is the difficulty of obtaining reliable temperature measurements when gas temperatures vary rapidly. In the work described here gas temperatures have been measured using a fine wire resistance thermometer with a 3.8 micron active sensor. The equipment represented the basic elements of a cryocooler: a clearance seal linear compressor and a wire mesh regenerator. Both were operated close to ambient temperature, with gas temperatures being measured close to the regenerator.The test rig was run at different volume ratios, frequencies (8–50 Hz), gases and filling pressures (1–26 bar). The waveforms of the gas temperature were found to vary dramatically for differing flow regimes. The results suggested that the thermometer was measuring the temperatures of two distinct volumes of gas, and that the gas must remain stratified in the compression space. A flow transition was identified from the cycle-by-cycle variations in temperature. The critical Rey...","PeriodicalId":80359,"journal":{"name":"Advances in cryogenic engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1063/1.2908536","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58365044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
CALCULATED REGENERATOR PERFORMANCE AT 4 K WITH HELIUM-4 AND HELIUM-3 计算了氦-4和氦-3在4k下的蓄热器性能
Advances in cryogenic engineering Pub Date : 2008-03-27 DOI: 10.1063/1.2908551
R. Radebaugh, Yonghua Huang, A. O'Gallagher, J. Gary
{"title":"CALCULATED REGENERATOR PERFORMANCE AT 4 K WITH HELIUM-4 AND HELIUM-3","authors":"R. Radebaugh, Yonghua Huang, A. O'Gallagher, J. Gary","doi":"10.1063/1.2908551","DOIUrl":"https://doi.org/10.1063/1.2908551","url":null,"abstract":"The helium-4 working fluid in regenerative cryocoolers operating with the cold end near 4 K deviates considerably from an ideal gas. As a result, losses in the regenerator, given by the time-averaged enthalpy flux, are increased and are strong functions of the operating pressure and temperature. Helium-3, with its lower boiling point, behaves somewhat closer to an ideal gas in this low temperature range and can reduce the losses in 4 K regenerators. An analytical model is used to find the fluid properties that strongly influence the regenerator losses as well as the gross refrigeration power. The thermodynamic and transport properties of helium-3 were incorporated into the latest NIST regenerator numerical model, known as REGEN3.3, which was used to model regenerator performance with either helium-4 or helium-3. With this model we show how the use of helium-3 in place of helium-4 can improve the performance of 4 K regenerative cryocoolers. The effects of operating pressure, warm-end temperature, and frequency on regenerators with helium-4 and helium-3 are investigated and compared. The results are used to find optimum operating conditions. The frequency range investigated varies from 1 Hz to 30 Hz, with particular emphasis on higher frequencies.","PeriodicalId":80359,"journal":{"name":"Advances in cryogenic engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1063/1.2908551","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58365077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 32
CRYOGENIC PROPELLANT BOIL-OFF REDUCTION SYSTEM 低温推进剂蒸发减少系统
Advances in cryogenic engineering Pub Date : 2008-03-27 DOI: 10.1063/1.2908506
D. Plachta, R. Christie, E. Carlberg, J. Feller
{"title":"CRYOGENIC PROPELLANT BOIL-OFF REDUCTION SYSTEM","authors":"D. Plachta, R. Christie, E. Carlberg, J. Feller","doi":"10.1063/1.2908506","DOIUrl":"https://doi.org/10.1063/1.2908506","url":null,"abstract":"Lunar missions under consideration would benefit from incorporation of high specific impulse propellants such as LH2 and LO2, even with their accompanying boil-off losses necessary to maintain a steady tank pressure. This paper addresses a cryogenic propellant boil-off reduction system to minimize or eliminate boil-off. Concepts to do so were considered under the In-Space Cryogenic Propellant Depot Project. Specific to that was an investigation of cryocooler integration concepts for relatively large depot sized propellant tanks. One concept proved promising—it served to efficiently move heat to the cryocooler even over long distances via a compressed helium loop. The analyses and designs for this were incorporated into NASA Glenn Research Center's Cryogenic Analysis Tool. That design approach is explained and shown herein. Analysis shows that, when compared to passive only cryogenic storage, the boil-off reduction system begins to reduce system mass if durations are as low as 40 days for LH2, and 14 days ...","PeriodicalId":80359,"journal":{"name":"Advances in cryogenic engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1063/1.2908506","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58365385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 23
DESIGN AND MANUFACTURING OF THE KSTAR TOKAMAK HELIUM REFRIGERATION SYSTEM kstar托卡马克氦制冷系统的设计与制造
Advances in cryogenic engineering Pub Date : 2008-03-27 DOI: 10.1063/1.2908599
P. Dauguet, P. Briend, I. Abe, E. Fauve, Jean Bernhardt, F. Andrieu, J. Beauvisage
{"title":"DESIGN AND MANUFACTURING OF THE KSTAR TOKAMAK HELIUM REFRIGERATION SYSTEM","authors":"P. Dauguet, P. Briend, I. Abe, E. Fauve, Jean Bernhardt, F. Andrieu, J. Beauvisage","doi":"10.1063/1.2908599","DOIUrl":"https://doi.org/10.1063/1.2908599","url":null,"abstract":"The KSTAR (Korean Superconducting Tokamak Advanced Research) project makes intensive use of superconducting (SC) magnets operated at 4.4 K. The cold components of KSTAR require a forced flow of supercritical helium for magnets and structure, boiling liquid helium for current leads, and gaseous helium for thermal shields. A helium refrigeration system has been custom-designed for this project. The purpose of this paper is to give a brief overview of the proposed cryogenic system. The specified thermal loads for the different operating modes are presented. This specification results in the definition of a design mode for the refrigerator. The design and construction of the resulting 9 kW at 4.5-K Helium Refrigeration System (HSR) are presented.","PeriodicalId":80359,"journal":{"name":"Advances in cryogenic engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1063/1.2908599","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58365642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Micromachined Joule-Thomson coolers 微机械焦耳-汤姆逊冷却器
Advances in cryogenic engineering Pub Date : 2008-03-16 DOI: 10.1063/1.2908606
P. Lerou, H. T. Brake, H. Jansen, J. Burger, H. J. Holland, H. Rogalla
{"title":"Micromachined Joule-Thomson coolers","authors":"P. Lerou, H. T. Brake, H. Jansen, J. Burger, H. J. Holland, H. Rogalla","doi":"10.1063/1.2908606","DOIUrl":"https://doi.org/10.1063/1.2908606","url":null,"abstract":"A MEMS-based Joule-Thomson cold stage was designed and prototypes were realized and tested. The cold stage consists of a stack of three glass wafers. In the top wafer, a high-pressure channel is etched that ends in a flow restriction with a height of typically 300 nm. An evaporator volume crosses the center wafer into the bottom wafer. This bottom wafer contains the low-pressure channel thus forming a counter-flow heat exchanger. A design aiming at a net cooling power of 10 mW at 96 K and operating with nitrogen as the working fluid was optimized based on the minimization of entropy production. A batch of prototype coolers ranging from 20 to 40 mm was made for a flow of typically 1mgCs-1 at a high pressure of 80 bar and a low pressure of 6 bar. The design and fabrication of the coolers will be discussed along with experimental results. A specific issue that will be addressed is the clogging of the restriction due to the deposition of ice crystals. Furthermore, introductory experiments with multistage microcoolers will be discussed. © 2008 American Institute of Physics.","PeriodicalId":80359,"journal":{"name":"Advances in cryogenic engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1063/1.2908606","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58365649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Cryogenic and vacuum technological aspects of the low-energy electrostatic cryogenic storage ring 低温和真空技术方面的低能静电低温储存环
Advances in cryogenic engineering Pub Date : 2008-03-16 DOI: 10.1063/1.2908478
D. Orlov, M. Lange, M. Froese, R. Hahn, M. Grieser, V. Mallinger, M. Rappaport, T. Sieber, T. Weber, A. Wolf
{"title":"Cryogenic and vacuum technological aspects of the low-energy electrostatic cryogenic storage ring","authors":"D. Orlov, M. Lange, M. Froese, R. Hahn, M. Grieser, V. Mallinger, M. Rappaport, T. Sieber, T. Weber, A. Wolf","doi":"10.1063/1.2908478","DOIUrl":"https://doi.org/10.1063/1.2908478","url":null,"abstract":"The cryogenic and vacuum concepts for the electrostatic Cryogenic ion Storage Ring (CSR), under construction at the Max-Planck-Institut fur Kernphysik in Heidelberg, is presented. The ring will operate in a broad temperature range from 2 to 300 K and is required to be bakeable up to 600 K. Extremely high vacuum and low temperatures are necessary to achieve long lifetimes of the molecular ions stored in the ring so that the ions will have enough time to cool by radiation to their vibrational and rotational ground states. To test cryogenic and vacuum technological aspects of the CSR, a prototype is being built and will be connected to the commercial cryogenic refrigerator recently installed, including a specialized 2-K connection system. The first results and the status of current work with the prototype are also presented.","PeriodicalId":80359,"journal":{"name":"Advances in cryogenic engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1063/1.2908478","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58365272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
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