检索结果-南通市图书馆

Thermal Performance of a 4 K High-Frequency Pulse Tube Cryocooler with Different Working Fluids

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2024年第4期33卷 1468-1479页

作者： GAO Zhaozhao YANG Biao FAN Xiaoyu chen liubiao WANG Junjie Key Laboratory of Cryogenic Science and Technology Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China

The high-frequency pulse tube cryocooler(HPTC)represents a promising miniature cryocooling technology due to its compact structure and the absence of low-temperature moving ***,limited to the non-ideal gas effect of4He,the HPTC is hard to obtain high cooling performance in the liquid helium temperature range.3He as the working fluid can effectively improve the cooling performance of the HPTC,but the high cost hinders its wide *** consideration of both cooling performance and cost-effectiveness,this paper explores the feasibility of utilizing^(3)He-^(4)He mixtures as the working fluid for ***,the experimental results of a developed HPTC based4He are *** a total power consumption of 575 W,the lowest temperature of 3.26 K was *** the measured cooling power at 4.2 K was 20.8 *** the theoretical utmost efficiency of the cryocooler was calculated in terms of the thermophysical properties of the working fluids,using ^(3)He-^(4)He mixtures with different compositions as the working *** whole machine modeling of the HPTC was further carried out,and the influence of the working fluids with different components on the structural parameters such as double-inlet and inertance tube,and operating parameters such as pressure and frequency were *** calculated results show that the cooling power is expected to be increased to36 mW and 53 mW if the equimolar ^(3)He-^(4)He mixture and pure ^(3)He are used,respectively.

关键词： high-frequency pulse tube cryocooler ^(3)He-^(4)He mixture liquid helium temperature thermally coupled

Performance improvement of a pulse tube cryocooler with a single compressor through cascade utilization of cold energy

在线全文

学校读者我要写书评

暂无评论

Frontiers in Energy 2021年第2期15卷 345-357页

作者： Xuming LIU Xiafan XU Biao YANG Xiaotong XI liubiao chen Junjie WANG Yuan ZHOU Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of the Chinese Academy of Sciences Beijing 100049China

The high-frequency pulse tube cryocooler(HPTC)has been attracting increasing and widespread attention in the field of cryogenic technology because of its compact structure,low vibration,and reliable *** gas-coupled HPTC,driven by a single compressor,is currently the simplest and most compact *** HPTCs operating below 20 K,in order to obtain the mW cooling capacity,hundreds or even thousands of watts of electrical power are consumed,where radiation heat leakage accounts for a large proportion of their cooling *** this paper,based on SAGE10,a HPTC heat radiation calculation model was first established to study the effects of radiation heat leakage on apparent performance parameters(such as temperature and cooling capacity),and internal parameters(such as enthalpy flow and gas distribution)of the gas-coupled *** active thermal insulation method of cascade utilization of the cold energy of the system was proposed for the gas-coupled *** simulations indicate that the reduction of external radiation heat leakage cannot only directly increase the net cooling power,but also decrease the internal gross losses and increase the mass and acoustic power in the lower-temperature section,which further enhances the refrigeration *** numerical calculation results were verified by experiments,and the test results showed that the no-load temperature of the developed cryocooler prototype decreased from 15.1 K to 6.4 K,and the relative Carnot efficiency at 15.5 K increased from 0.029%to 0.996%when substituting the proposed active method for the traditional passive method with multi-layer thermal insulation materials.

关键词： radiation heat leakage active thermal insulation cascade utilization cold energy performance improvement cryocooler

Attaining the liquid helium temperature with a compact pulse tube cryocooler for space applications

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2020年第3期63卷 434-439页

作者： LIU XuMing chen liubiao WU XianLin YANG Biao WANG Jue ZHU WenXiu WANG JunJie ZHOU Yuan Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Recent breakthroughs in space science have motivated space exploration programs in many countries including China. Cryocoolers, which provide the mandatory low-temperature environment for many sensitive yet delicate space detectors, are crucial for the proper functioning of various systems. One benchmark for the cryocooler performance is attaining the liquid helium temperature. However, even with complex configurations and multiple driving sources, only a few cryocoolers to date can achieve this goal. Here we report a high-frequency pulse tube cryocooler(HPTC) driven by a single non-oil-lubrication compressor which is capable of reaching the liquid helium temperature while offering other advantages such as high compactness, excellent reliability and high efficiency. The HPTC obtains a no-load temperature of 4.4 K, which is the first realization of cooling below the4 He critical point with a gas-coupled two-stage arrangement. The prototype can provide a cooling power of 87 mW at 8 K, and 5.2 mW at 5 K with a 425 W input electric power, showing leading-level efficiency. Moreover, we demonstrate the ability of the cryocooler to simultaneously provide cooling power at different temperature levels to meet different requirements. Therefore, the prototype developed here could be a promising cryocooler for space applications and beyond.

关键词： cryocooler liquid helium temperature space exploration high frequency

First high-frequency pulse tube cryocooler down to 2.5 K and its promising application in China’s deep space exploration

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2023年第8期66卷 2454-2456页

作者： YANG Biao GAO ZhaoZhao chen liubiao LIU SiXue ZHOU Qiang GUO Jia CUI chen ZHU WenXiu JIN Hai ZHOU Yuan WANG JunJie Chinese Academy of Sciences Key Laboratory of Technology on Space Energy ConversionTechnical Institute of Physics and ChemistryBeijing 100190China Beijing Key Laboratory of Space Thermal Control Technology Beijing Institute of Spacecraft System EngineeringChina Academy of Space TechnologyBeijing 100094China Department of Astronomy Tsinghua UniversityBeijing 100084China Chinese Academy of Sciences Key Laboratory of CryogenicsTechnical Institute of Physics and ChemistryBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

From the Moon,Mars,to the central body of the solar system,the Sun,and even exoplanets,deep space exploration[1]has promoted research on the formation and evolution of the solar system and the universe,especially,in terms of tracing life’s *** inherent characteristic of high energy flux density determines that space detectors cannot fully dissipate heat through radiative cooling under the cosmic microwave background radiation temperature of 2.7 K.

关键词： planet universe microwave

A novel cryogenic insulation system of hollow glass microspheres and self-evaporation vapor-cooled shield for liquid hydrogen storage

在线全文

学校读者我要写书评

暂无评论

Frontiers in Energy 2020年第3期14卷 570-577页

作者： Jianpeng ZHENG liubiao chen Ping WANG Jingjie ZHANG Junjie WANG Yuan ZHOU Chinese Academy of Sciences Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryBeijing 100190China University of Chinese Academy of Sciences Beijing 100190China Chinese Academy of Sciences State Key Laboratory of Technologies in Space Cryogenic Propellants Technical Institute of Physics and ChemistryBeijing 100190China

Liquid hydrogen(LH2)attracts widespread attention because of its highest energy storage ***,evaporation loss is a serious problem in LH2 storage due to the low boiling point(20 K).Efficient insulation technology is an important issue in the study of LH2 *** glass microspheres(HGMs)is a potential promising thermal insulation material because of its low apparent thermal conductivity,fast installation(Compared with multi-layer insulation,it can be injected in a short time.),and easy maintenance.A novel cryogenic insulation system consisting of HGMs and a selfevaporating vapor-cooled shield(VCS)is proposed for storage of LH2.A thermodynamic model has been established to analyze the coupled heat transfer characteristics of HGMs and VCS in the composite insulation *** results show that the combination of HGMs and VCS can effectively reduce heat flux into the LH2 *** the increase of VCS number from 1 to 3,the minimum heat flux through HGMs decreases by 57.36%,65.29%,and 68.21%,*** significant advantage of HGMs is that their thermal insulation properties are not sensitive to ambient vacuum *** ambient vacuum rises from 10^-3 Pa to 1 Pa,the heat flux into the LH2 tank increases by approximately 20%.When the vacuum rises from 10^-3 Pa to 100 Pa,the combination of VCS and HGMs reduces the heat flux into the tank by 58.08%-69.84% compared with pure HGMs.

关键词： liquid hydrogen storage hollow glass microspheres(HGMs) self-evaporation vapor-cooled shield(VCS) thermodynamic optimization

First stirling-type cryocooler reaching lambda point of ~4He(2.17K) and its prospect in Chinese HUBS satellite project

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science Bulletin 2019年第4期64卷 219-221页

作者： Jue Wang Changzhao Pan Tong Zhang Kaiqi Luo Xiaotong Xi Xianlin Wu Jianpeng Zheng liubiao chen Junjie Wang Yuan Zhou Hai Jin Wei Cui University of Chinese Academy of Sciences CAS Key Laboratory of Cryogenics Technical Institute of Physics and Chemistry Chinese Academy of Sciences Laboratoire National de Métrologie Et d'essais-Conservatoire National des Arts et Métiers (LNE-Cnam) State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments Department of Electrical Engineering Tsinghua University Department of Physics and Center for Astrophysics Tsinghua University

The issue of "missing baryons” is always an unsolved mystery in galaxy cosmology, and an important reason for the great uncertainty of the galaxies' formation and evolution. To find the "missing" baryons, extra high-resolution spectral observation and imaging of the soft X-ray band (<1 kev) is required. However, the existing observation methods cannot meet this requirement. Therefore, Tsinghua University leads and proposes the Chinese "Hot Universe Baryon Surveyor (HUBS)" satellite program.

关键词： missing baryons HUBS missing

开孔泡沫铝的低温热导率测量及其低温蓄冷应用研究（英文）

在线全文

学校读者我要写书评

暂无评论

稀有金属材料与工程 2018年第4期47卷 1049-1053页

作者：孔春辉陈六彪吴显林周远王俊杰中国科学院低温工程学重点实验室(理化技术研究所) 北京100190 中国科学院大学北京100049

新型材料的应用对低温装置的发展起具有重大意义。为提高低温蓄冷装置的温度均衡性,一种孔隙率为63%的开孔泡沫铝材料最近在一种低温蓄冷装置中进行了实验研究。实验测试了样品从50 K到170 K的热导率,测试结果显示开孔泡沫铝在测试温度... 详细信息

新型材料的应用对低温装置的发展起具有重大意义。为提高低温蓄冷装置的温度均衡性,一种孔隙率为63%的开孔泡沫铝材料最近在一种低温蓄冷装置中进行了实验研究。实验测试了样品从50 K到170 K的热导率,测试结果显示开孔泡沫铝在测试温度区间内热导率随温度降低而升高,其平均值为22W·(m·K)^(-1)。实验测试了开孔泡沫铝热导率对采用泡沫铝低温蓄冷装置的性能的影响。蓄冷装置中采用的相变材料为氮。实验中主要测试值为蓄冷装置在降温过程和融化过程中的温度值。实验结果显示,此装置上、下部分的最大温差小于0.5 K,远小于不采用开孔泡沫铝时的温差。随着低温蓄冷装置热导率的提高,蓄冷装置上、下部温差以及单个温度测定的温度波动均减小。

关键词：开孔泡沫铝热导率蓄冷

在线全文

学校读者我要写书评

暂无评论

新型液氦温区热声驱动制冷系统研究

工程热物理学报 2023年第4期44卷 886-893页

作者：迟佳欣徐静远陈六彪周远罗二仓中国科学院理化技术研究所低温工程学重点实验室北京100190 中国科学院大学北京100049 帝国理工学院化学工程系伦敦SW72AZ

提出一种采用气液耦合谐振子的新型热声驱动制冷系统,理论上首次实现液氦温区制冷。模拟结果显示,系统最低无负荷制冷温度达到5.9 K,为目前热声制冷系统的最低记录。本文首先基于数值模拟优化了新型热声制冷系统结构参数;然后,分别揭示... 详细信息

提出一种采用气液耦合谐振子的新型热声驱动制冷系统,理论上首次实现液氦温区制冷。模拟结果显示,系统最低无负荷制冷温度达到5.9 K,为目前热声制冷系统的最低记录。本文首先基于数值模拟优化了新型热声制冷系统结构参数;然后,分别揭示了系统内部关键参数的沿程分布以及热力学性能的影响规律。本研究填补了热声制冷技术应用于液氦温区的空白,有望为航天、低温电子器件及氢能源利用等领域中的新型热驱动制冷机奠定理论基础。

关键词：热声热声发动机热声制冷液氦温区气液耦合

在线全文

学校读者我要写书评

暂无评论

食品液氮速冻技术研究进展

制冷学报 2019年第2期40卷 1-11页

作者：赵远恒郭嘉陈六彪顾开选王俊杰中国科学院理化技术研究所中国科学院低温工程学重点实验室北京100190 中国科学院大学北京100049

液氮速冻技术能使食品快速穿过冰晶区实现食品的玻璃化或部分玻璃化,提高速冻食品的品质,在食品冷链中广泛应用。本文概括了食品液氮速冻技术的基本原理和经典传热模型,对比了液氮浸渍冻结、冷气循环冻结和喷淋冻结等速冻方式的特点,总... 详细信息

液氮速冻技术能使食品快速穿过冰晶区实现食品的玻璃化或部分玻璃化,提高速冻食品的品质,在食品冷链中广泛应用。本文概括了食品液氮速冻技术的基本原理和经典传热模型,对比了液氮浸渍冻结、冷气循环冻结和喷淋冻结等速冻方式的特点,总结了速冻食品品质评价的研究进展和液氮速冻技术在食品加工中的应用范围,并展望了液氮速冻技术未来的研究方向。

关键词：食品速冻玻璃化液氮速冻