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Novel methods by using non-vacuum insulated tubing to extend the lifetime of the tubing

Chenglong ZHOU,Guojin ZHU,Yongxiang XU,Jifei YU,Xiaoliang ZHANG,Hongzhi SHENG

Frontiers in Energy 2015, Volume 9, Issue 2,   Pages 142-147 doi: 10.1007/s11708-015-0357-7

Abstract: The analysis of the failure mechanics, namely hydrogen permeation of vacuum insulated tubing (VIT), indicatedTo solve this problem, some measures by using non-vacuum materials were proposed and analyzed in thisThe results show that to fill the tubing with foam-glass beads or high pressure argon may lead to a good

Keywords： vacuum insulated tubing     cyclic steam stimulation     insulation material     thermal conductivity     foam-glass    

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Lateral displacement of soft ground under vacuum pressure and surcharge load

Chin-Yee ONG, Jin-Chun CHAI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2,   Pages 239-248 doi: 10.1007/s11709-011-0110-1

Abstract: Surcharge load (e.g. embankment fill) will induce settlement and outward lateral displacement, while vacuumIdeally, combination of surcharge load and vacuum pressure can reduce or minimize the lateral displacementthe main influencing factors on lateral displacement of a soft clayey ground under the combination of vacuumthat the outward lateral displacement increases with the increase of the ratio of surcharge load to vacuumTo predict the lateral displacement of a ground under the combination of surcharge load and vacuum pressure

Keywords： vacuum consolidation     lateral displacement     PVD     finite element analysis     surcharge load    

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Status and Prospect of Remanufacturing Technology for Tubing and Sucker Rods

He Liu,Tao Li,Wei-ye Han,Qiang Chen,Shou-zhi Huang,Er-yang Ming,Qiang Sun

Frontiers of Engineering Management 2016, Volume 3, Issue 3,   Pages 258-263 doi: 10.15302/J-FEM-2016031

Abstract: As the main consumables, huge amount of tubing and sucker rods are abandoned annually.The current remediation technology could only enable part of abandoned tubing and sucker rod to be reusedThe production, use and remediation methods of tubing and sucker rod are analyzed here.Remanufacturing technology of abandoned tubing based on self-propagating high temperature synthesis (conventional remediation methods, remanufacturing technology can extend the service life of abandoned tubing

Keywords： remanufacturing     SHS     tubing     sucker rods    

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Numerical study of conduction and radiation heat losses from vacuum annulus in parabolic trough receivers

Dongqiang LEI, Yucong REN, Zhifeng WANG

Frontiers in Energy 2022, Volume 16, Issue 6,   Pages 1048-1059 doi: 10.1007/s11708-020-0670-7

Abstract: Parabolic trough receiver is a key component to convert solar energy into thermal energy in the parabolic trough solar system. The heat loss of the receiver has an important influence on the thermal efficiency and the operating cost of the power station. In this paper, conduction and radiation heat losses are analyzed respectively to identify the heat loss mechanism of the receiver. A 2-D heat transfer model is established by using the direct simulation Monte Carlo method for rarefied gas flow and heat transfer within the annulus of the receiver to predict the conduction heat loss caused by residual gases. The numerical results conform to the experimental results, and show the temperature of the glass envelope and heat loss for various conditions in detail. The effects of annulus pressure, gas species, temperature of heat transfer fluid, and annulus size on the conduction and radiation heat losses are systematically analyzed. Besides, the main factors that cause heat loss are analyzed, providing a theoretical basis for guiding the improvement of receiver, as well as the operation and maintenance strategy to reduce heat loss.

Keywords： parabolic trough receiver     vacuum annulus     rarefied gas     DSMC (direct simulation Monte Carlo)     heat loss    

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The optimization techniques of well structure design and tubing selection for Puguang Gas Field

Wang Chunjiang,Yang Yukun

Strategic Study of CAE 2010, Volume 12, Issue 10,   Pages 39-43

Abstract: characteristics in Puguang gas field, proposes the optimization idea and technique of well structure design and tubing

Keywords： Puguang Gas Field     drilling engineering     well structure     design optimization     tubing optimization    

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interconnected nano-channels into polyvinylidene fluoride membranes for desalination applications by vacuum

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 9,   Pages 1162-1182 doi: 10.1007/s11705-022-2276-6

Abstract: to fabricate lycopodium/polyvinylidene fluoride flat-sheet membrane for desalination applications by vacuumIn vacuum membrane distillation experiments, using a 15000 ppm NaCl solution as a feed at 70 °C, the

Keywords： lycopodium     hydrophobicity     vacuum membrane distillation     desalination    

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Toward better understanding vacuum ultraviolet–iodide induced photolysis via hydrogen peroxide formation

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 5, doi: 10.1007/s11783-021-1489-0

Abstract:

• UV/VUV/I– induces substantial H2O2 and IO3– formation, but UV/I– does not.

Keywords： Vacuum ultraviolet     Hydrogen peroxide     Iodate     Hydroxyl radical     Redox transition    

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Research on fuzzy neural network control method for high-frequency vacuum drying of wood

Jiang Bin,Sun Liping,Cao Jun and Zhou Zheng

Strategic Study of CAE 2014, Volume 16, Issue 4,   Pages 17-20

Abstract:

High- frequency vacuum combined wood drying is a kind of fast dryingOn the basis of theoretical analysis with high frequency in wood vacuum drying process，the fuzzy controller

Keywords： high-frequency vacuum     wood drying     fuzzy neural network    

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The development of BG2250-125 Ni-based alloy tubing used in severe sour oil field

Shen Chen,Zhang Zhonghua,Zhang Chunxia

Strategic Study of CAE 2010, Volume 12, Issue 10,   Pages 35-38

Abstract:

The development of Ni-based alloy BG2250 tubing used in severe sour gas,the mechanical properties, corrosion resistance and pipe qualities of the Ni-based alloy tubing developedThe Ni-based alloy tubing BG2250-125 has been successfully applied to Puguang gas well, which provides

Keywords： Ni-based alloy     tubing     sour well     product properties    

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Enhancement of distillate output of double basin solar still with vacuum tubes

Hitesh N PANCHAL, P K SHAH

Frontiers in Energy 2014, Volume 8, Issue 1,   Pages 101-109 doi: 10.1007/s11708-014-0299-5

Abstract: The performance of the double basin solar still was also increased by attaching vacuum tubes to the lowerproposed a novel approach to increase the distillate output of the double basin solar still attached with vacuumThe integration of vacuum tubes with solar still greatly increases the distillate output of the solar

Keywords： double basin solar still     calcium stones     pebbles     granite gravel     distillate output    

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Molecular size characterization of heavy oil fractions in vacuum and solution by molecular dynamic simulation

Wenpo REN, Honggang CHEN, Chaohe YANG, Honghong SHAN,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 3,   Pages 250-256 doi: 10.1007/s11705-009-0281-7

Abstract: And then, the most stable conformations of polycyclic aromatic and heavy resin in vacuum and toluenethat the radius of gyration of polycyclic aromatic and heavy resin was 0.55–0.70 nm in vacuumWith molecular weight increasing, the molecular size in vacuum and toluene solution also increased.Thus, the molecular size in toluene solution was larger than that in vacuum.

Keywords： dynamic simulation     molecular dynamic     behavior     molecule     Adsorption Chromatography    

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Technological Development of High Speed Maglev System Based on Low Vacuum Pipeline

Feng Zhongwei, Fang Xing, Li Hongmei, Cheng Aijun, Pan Yongjie

Strategic Study of CAE 2018, Volume 20, Issue 6,   Pages 105-111 doi: 10.15302/J-SSCAE-2018.06.017

Abstract: the magnetic levitation technique to reduce wheel-rail friction and vibration, construction of a low vacuumThis paper expounds the significance of developing a high speed maglev system based on low vacuum pipelines

Keywords： rail transit     low vacuum pipes     high speed maglev     system technology    

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Performance of insulated FRP-strengthened concrete flexural members under fire conditions

Pratik P. BHATT, Venkatesh K. R. KODUR, Anuj M. SHAKYA, Tarek ALKHRDAJI

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 177-193 doi: 10.1007/s11709-021-0714-z

Abstract: tests and numerical studies indicate that owing to the protection provided by the fire insulation, the insulated

Keywords： concrete beams     concrete slabs     carbon fiber-reinforced polymers     fire resistance     FRP strengthening     repair     retrofitting    

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Vacuum promotes metabolic shifts and increases biogenic hydrogen production in dark fermentation systems

Haifa RAJHI,Daniel PUYOL,Mirna C. MARTÍNEZ,Emiliano E. DÍAZ,José L. SANZ

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 3,   Pages 513-521 doi: 10.1007/s11783-015-0777-y

Abstract: four synthetic media, two industrial wastewater, and one domestic effluent) and the effect of applying vacuumThe application of vacuum promoted an increase in the diversity of hydrogen-producing bacteria, suchNevertheless, reduction of the hydrogen partial pressure by application of vacuum lead to further oxidationInterestingly, vacuum greatly promoted biogenic hydrogen production from a real wastewater, which opens

Keywords： dark fermentation     biohydrogen     wastewaters     vacuum    

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Development of 8-inch Key Processes for Insulated-Gate Bipolar Transistor Article

Guoyou Liu,Rongjun Ding,Haihui Luo

Engineering 2015, Volume 1, Issue 3,   Pages 361-366 doi: 10.15302/J-ENG-2015043

Abstract: wafer, as well as the fourth-generation high-voltage double-diffused metal-oxide semiconductor (DMOS+) insulated-gate

Keywords： insulated-gate bipolar transistor (IGBT)     high power density     trench gate     8-inch     rail transportation    

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Title Author Date Type Operation

Novel methods by using non-vacuum insulated tubing to extend the lifetime of the tubing

Chenglong ZHOU,Guojin ZHU,Yongxiang XU,Jifei YU,Xiaoliang ZHANG,Hongzhi SHENG

Journal Article

Lateral displacement of soft ground under vacuum pressure and surcharge load

Chin-Yee ONG, Jin-Chun CHAI

Journal Article

Status and Prospect of Remanufacturing Technology for Tubing and Sucker Rods

He Liu,Tao Li,Wei-ye Han,Qiang Chen,Shou-zhi Huang,Er-yang Ming,Qiang Sun

Journal Article

Numerical study of conduction and radiation heat losses from vacuum annulus in parabolic trough receivers

Dongqiang LEI, Yucong REN, Zhifeng WANG

Journal Article

The optimization techniques of well structure design and tubing selection for Puguang Gas Field

Wang Chunjiang,Yang Yukun

Journal Article

interconnected nano-channels into polyvinylidene fluoride membranes for desalination applications by vacuum

Journal Article

Toward better understanding vacuum ultraviolet–iodide induced photolysis via hydrogen peroxide formation

Journal Article

Research on fuzzy neural network control method for high-frequency vacuum drying of wood

Jiang Bin,Sun Liping,Cao Jun and Zhou Zheng

Journal Article

The development of BG2250-125 Ni-based alloy tubing used in severe sour oil field

Shen Chen,Zhang Zhonghua,Zhang Chunxia

Journal Article

Enhancement of distillate output of double basin solar still with vacuum tubes

Hitesh N PANCHAL, P K SHAH

Journal Article

Molecular size characterization of heavy oil fractions in vacuum and solution by molecular dynamic simulation

Wenpo REN, Honggang CHEN, Chaohe YANG, Honghong SHAN,

Journal Article

Technological Development of High Speed Maglev System Based on Low Vacuum Pipeline

Feng Zhongwei, Fang Xing, Li Hongmei, Cheng Aijun, Pan Yongjie

Journal Article

Performance of insulated FRP-strengthened concrete flexural members under fire conditions

Pratik P. BHATT, Venkatesh K. R. KODUR, Anuj M. SHAKYA, Tarek ALKHRDAJI

Journal Article

Vacuum promotes metabolic shifts and increases biogenic hydrogen production in dark fermentation systems

Haifa RAJHI,Daniel PUYOL,Mirna C. MARTÍNEZ,Emiliano E. DÍAZ,José L. SANZ

Journal Article

Development of 8-inch Key Processes for Insulated-Gate Bipolar Transistor

Guoyou Liu,Rongjun Ding,Haihui Luo

Journal Article