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Influence of geometrical modeling on the results of numerical prediction for the centrifugal compressor with shrouded impeller EI CSCD
期刊论文 | 2017 , 47 (6) , 618-631 | Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica
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Abstract :

The overall perfomance of a centrifugal compressor prototype stage with shrouded impeller has been measured. Some factors influencing the numerical prediction accuracy and choke mass flow rate have been investigated numerically using different computational models generated by the component superposition method. A structure correction method using the equivalent blade thickness to replace the impeller fillet was proposed and verified. The main goal of this research was to find out a reasonable simulation strategy for the centrifugal compressor with shrouded impeller through assessing the influence of various fine structures and omitted treatments on the overall performance. A peak isentropic efficiency of 80.28% for the compressor stage was obtained experimently while the numerical model with the equivalent blade thickness correction achieved a peak efficiency of 82.02%. The results indicate that the shroud gap and seal, the impeller fillet as well as the blade machining error are the main geometric structure factors to influence the shrouded centrifugal compressor performance. The shroud gap leakage flow decreases the effective throat area of the shrouded impeller, which leads to the decrease of the choke mass flow rate, the acceleration of the fluid in the impeller passage and the reduce of the impeller diffusion ability. At a given exit pressure, the choke mass flow rate decreases with the increase of the impeller blade relative thickness. Using the equivalent blade thickness to replace the impeller fillet can make the compressor maintain an unchanged performance in the small mass flow conditions, but improve the numerical simulation accuracy in the large mass flow conditions. © 2017, Science Press. All right reserved.

Keyword :

Blade thickness Fillet Mass flow rate Shroud gap Shrouded impeller

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GB/T 7714 Tang, Yonghong , Tian, Yubao , Wang, Zhiheng et al. Influence of geometrical modeling on the results of numerical prediction for the centrifugal compressor with shrouded impeller [J]. | Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica , 2017 , 47 (6) : 618-631 .
MLA Tang, Yonghong et al. "Influence of geometrical modeling on the results of numerical prediction for the centrifugal compressor with shrouded impeller" . | Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica 47 . 6 (2017) : 618-631 .
APA Tang, Yonghong , Tian, Yubao , Wang, Zhiheng , Xi, Guang . Influence of geometrical modeling on the results of numerical prediction for the centrifugal compressor with shrouded impeller . | Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica , 2017 , 47 (6) , 618-631 .
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气阀改造提升压缩机的性能
期刊论文 | 2017 , (5) , 40-43 | 化肥工业
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Abstract :

压缩机是化肥生产中的关键设备,对产能、电耗及安全生产起着至关重要的作用.气阀对压缩机的性能有着重要影响,被称为压缩机的"心脏".理论与实践表明,对压缩机气阀进行分析与改造,能有效降低压缩机的电耗,提升压缩机的排气量,保障压缩机安全可靠运行.

Keyword :

气阀 排气量 电耗 可靠性 压缩机

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GB/T 7714 潘树林 , 欧胜芳 , 潘曦 . 气阀改造提升压缩机的性能 [J]. | 化肥工业 , 2017 , (5) : 40-43 .
MLA 潘树林 et al. "气阀改造提升压缩机的性能" . | 化肥工业 5 (2017) : 40-43 .
APA 潘树林 , 欧胜芳 , 潘曦 . 气阀改造提升压缩机的性能 . | 化肥工业 , 2017 , (5) , 40-43 .
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闭式离心压缩机几何建模对数值预测结果的影响 CSCD
期刊论文 | 2017 , (6) , 618-631 | 中国科学(技术科学)
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Keyword :

闭式叶轮 堵塞流量 离心压缩机 轮盖间隙 叶片厚度 圆角

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GB/T 7714 唐永洪 , 田玉宝 , 王志恒 et al. 闭式离心压缩机几何建模对数值预测结果的影响 [J]. | 中国科学(技术科学) , 2017 , (6) : 618-631 .
MLA 唐永洪 et al. "闭式离心压缩机几何建模对数值预测结果的影响" . | 中国科学(技术科学) 6 (2017) : 618-631 .
APA 唐永洪 , 田玉宝 , 王志恒 , 席光 . 闭式离心压缩机几何建模对数值预测结果的影响 . | 中国科学(技术科学) , 2017 , (6) , 618-631 .
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Conceptual Design and Performance Analysis of SOFC/Micro Gas Turbine Hybrid Distributed Energy System EI SCIE Scopus
期刊论文 | 2015 , 12 (3) | Journal of Fuel Cell Science and Technology | IF: 0.711
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A numerical model has been developed for the performance analysis of solid oxide fuel cell (SOFC)/micro gas turbine (MGT) hybrid systems with prereforming of natural gas, in which a quasi two-dimensional model has been built up to simulate the cell electrochemical reaction, heat and mass transfer within tubular SOFC. The developed model can be used not only to predict the overall performance of the SOFC/MGT hybrid system but also to reveal the nonuniform temperature distribution within SOFC unit. The effects of turbine inlet temperature (TIT) and pressure ratio (PR) on the performance of the hybrid system have been investigated. The results show that selecting smaller TIT or PR value will lead to relative higher system efficiency and lower CO2 emission ratio; however, this will raise the risk to destroy SOFC beyond the limitation temperature of electrolyte.

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GB/T 7714 Dang, Zheng , Zhao, Hua , Xi, Guang . Conceptual Design and Performance Analysis of SOFC/Micro Gas Turbine Hybrid Distributed Energy System [J]. | Journal of Fuel Cell Science and Technology , 2015 , 12 (3) .
MLA Dang, Zheng et al. "Conceptual Design and Performance Analysis of SOFC/Micro Gas Turbine Hybrid Distributed Energy System" . | Journal of Fuel Cell Science and Technology 12 . 3 (2015) .
APA Dang, Zheng , Zhao, Hua , Xi, Guang . Conceptual Design and Performance Analysis of SOFC/Micro Gas Turbine Hybrid Distributed Energy System . | Journal of Fuel Cell Science and Technology , 2015 , 12 (3) .
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Oxygen Enrichment through Mini-Scale Rotary Six-Bed Pressure Swing Adsorption EI CPCI-S Scopus
会议论文 | 2013 , 726-731 , 780-788 | 2nd International Conference on Energy and Environmental Protection (ICEEP 2013)
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Abstract :

This paper presents the structure for a rotary six-bed adsorber that carries out a six-step PSA continuous oxygen generation process with a short cycle time and a low operation pressure ratio. The working principle of a rotary six-bed PSA oxygen generator is introduced and the effects of various operating parameters on PSA performance are experimentally investigated. The results indicate that, the adsorption pressure increases with the reduction of rotating speed and decreases with the lowering of the feed flow rate; with the acceleration of rotating velocity, the oxygen purity of the gas produced first rises and then drops, and it has an optimum rotating velocity; the higher the feed flow rate, the lower the oxygen purity of the product; the ratio of the pressurization angle to the adsorption angle has a remarkable effect on the oxygen purity with the oxygen purity increasing according to the condition of keeping the angle of the feeding ring groove and with the increase in this ratio; and the long-purging time at a low purging-gas flow rate is appropriate for miniature apparatus.

Keyword :

Six-Bed Rotary Pressure Swing Adsorption Zeolite Air Separation Design Mini-Scale

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GB/T 7714 Ding, Liqun , Shu, Pengcheng . Oxygen Enrichment through Mini-Scale Rotary Six-Bed Pressure Swing Adsorption [C] . 2013 : 780-788 .
MLA Ding, Liqun et al. "Oxygen Enrichment through Mini-Scale Rotary Six-Bed Pressure Swing Adsorption" . (2013) : 780-788 .
APA Ding, Liqun , Shu, Pengcheng . Oxygen Enrichment through Mini-Scale Rotary Six-Bed Pressure Swing Adsorption . (2013) : 780-788 .
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Experimental research on performance of sliding vane expander used in energy recovery systems with HFC410A EI Scopus CSCD PKU
期刊论文 | 2012 , 46 (3) , 64-68 | Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University
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Abstract :

A sliding vane expander was designed to replace the throttling valve used in the energy recovery systems with HFCs. Its performance and the coefficient of performance (COP) of the refrigeration system were tested. The experimental results show that the prototype operated in the HFC410A refrigeration system continuously and steadily. Under the air-conditioning conditions, the volumetric ratio of HFC410A reached 7.48 in the expansion process. The prototype had the volumetric efficiency of 20.58% with the maximum isentropic efficiency of 20.26%. When springs were installed at the bottom of the vane, the volumetric efficiency and isentropic efficiency increased to 44.27% and 32.07%, respectively. The COP was 3.59 and rose by 6.49% compared with that of a throttling valve system. In addition, the optimum rotation speed range of the sliding vane expander was 1100-1200 r/min.

Keyword :

Coefficient of Performance Energy recovery Energy recovery system Experimental research Isentropic efficiency Sliding vane Volumetric efficiency Volumetric ratio

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GB/T 7714 Xia, Chunli , Zhao, Yuanyang , Bu, Gaoxuan et al. Experimental research on performance of sliding vane expander used in energy recovery systems with HFC410A [J]. | Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University , 2012 , 46 (3) : 64-68 .
MLA Xia, Chunli et al. "Experimental research on performance of sliding vane expander used in energy recovery systems with HFC410A" . | Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University 46 . 3 (2012) : 64-68 .
APA Xia, Chunli , Zhao, Yuanyang , Bu, Gaoxuan , Wang, Zhizhong , Shu, Pengcheng . Experimental research on performance of sliding vane expander used in energy recovery systems with HFC410A . | Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University , 2012 , 46 (3) , 64-68 .
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HFC410A制冷系统能量回收用滑片膨胀机的试验研究 CSCD PKU
期刊论文 | 2012 , (3) , 64-68 | 西安交通大学学报
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Abstract :

为了减小hydro-fluorocarbons(HFCs)制冷系统在节流过程中的能量损失,提高系统的效率(COP),开发出一种代替节流阀的滑片膨胀机样机,并对样机的性能进行了测试.结果表明,该样机可以满足HFCs工质在膨胀过程中的高容积比的要求.在以HFC410A为工质的制冷系统中,当空调工况下膨胀过程的容积比达到7.48时,样机运行稳定;在1100~1200 r/min的最佳运行转速下,样机等熵效率最高,对应的容积效率为20.58%.在滑片底部安装弹簧后,样机的容积效率提高到44.27%,等熵效率由原来的20.26%提高到32.07%.与节流阀系统相比,滑片膨胀机样机系统的COP提高了6.49%,达到了3.59.

Keyword :

滑片膨胀机 容积比 空调工况 能量回收 hydro-fluorocarbons

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GB/T 7714 夏春礼 , 赵远扬 , 卜高选 et al. HFC410A制冷系统能量回收用滑片膨胀机的试验研究 [J]. | 西安交通大学学报 , 2012 , (3) : 64-68 .
MLA 夏春礼 et al. "HFC410A制冷系统能量回收用滑片膨胀机的试验研究" . | 西安交通大学学报 3 (2012) : 64-68 .
APA 夏春礼 , 赵远扬 , 卜高选 , 王智忠 , 束鹏程 . HFC410A制冷系统能量回收用滑片膨胀机的试验研究 . | 西安交通大学学报 , 2012 , (3) , 64-68 .
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Experimental Investigation on Heat Transfer Performance of Top-heated Heat Pipe with Screen Mesh Wick CPCI-S
会议论文 | 2011 , 380-383 | 4th International Symposium on Heat Transfer and Energy Conservation (ISHTEC2012)
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Abstract :

An experimental study has been carried out to determine the effect of the inclination angle of the top-heated heat pipe, heat load and amount of working fluid charged into the heat pipe on the heat transfer performance of the heat pipe with a screen mesh wick. It was found that, the heat transfer capability decreases significantly as the inclination angle of the heat pipe increases. The thermal resistance of the heat transfer by the heat pipe decreases with increase of heat load. However, the rate of change of the thermal resistance becomes small as heat load increases. And the heat transfer capability increases with increase of heat load, While the amount of working fluid charged into the heat pipe was between 95 similar to 145m1, as the amount of working fluid increases, the thermal resistance of the heat pipe does not change drastically, however, when above 155ml the thermal resistance of the heat pipe increases significantly and the heat transfer capability of the heat pipe decreases.

Keyword :

heat transfer capability thermal resistance of the heat pipe top-heated heat pipe screen mesh wick

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GB/T 7714 Li, Yong , Ge, Yuequn , Kawal, Takeshi et al. Experimental Investigation on Heat Transfer Performance of Top-heated Heat Pipe with Screen Mesh Wick [C] . 2011 : 380-383 .
MLA Li, Yong et al. "Experimental Investigation on Heat Transfer Performance of Top-heated Heat Pipe with Screen Mesh Wick" . (2011) : 380-383 .
APA Li, Yong , Ge, Yuequn , Kawal, Takeshi , Shu, Pengcheng , Wang, Zhizhong . Experimental Investigation on Heat Transfer Performance of Top-heated Heat Pipe with Screen Mesh Wick . (2011) : 380-383 .
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A Study on Design Methodology and Concurrent Engineering on Scroll Vacuum Pump EI CPCI-S Scopus
会议论文 | 2011 , 154-155 , 1494-+ | International Conference on Advances in Materials and Manufacturing Processes
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Abstract :

The concept of concurrent engineering is that designers, manufacturing engineers and all other members of the new product development team can work simultaneously or co-operate closely to avoid redesign and other problems at a later stage. The finite element method/FEM is the kernel of the approach. It enables the designed outputs to be optimal, robust and efficient so that high quality products could be achieved at a low cost in the shortest delivery time. The scroll components work in a high pressure and high temperature environment, which results in the deformation of the scroll wall. If the deformation was too great the vacuum pump would fail and would have to be redesigned and remanufactured. The designer can seek optimization under the limitations imposed by the displacement or stress of the scroll wall. The FEM and optimization can evaluate the deformation due to the cutting force and compensate accordingly.

Keyword :

Scroll Profiles Concurrent Engineering Geometric Theory Scroll Vacuum Pump Vacuum Pump

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GB/T 7714 Wang, Licun , Chen, Jin , Zhang, Xianming . A Study on Design Methodology and Concurrent Engineering on Scroll Vacuum Pump [C] . 2011 : 1494-+ .
MLA Wang, Licun et al. "A Study on Design Methodology and Concurrent Engineering on Scroll Vacuum Pump" . (2011) : 1494-+ .
APA Wang, Licun , Chen, Jin , Zhang, Xianming . A Study on Design Methodology and Concurrent Engineering on Scroll Vacuum Pump . (2011) : 1494-+ .
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A study on integrated design conjugation profiles application analysis of scroll profiles for automobile air conditioning EI SCIE Scopus
期刊论文 | 2011 , 54 (6) , 1496-1504 | SCIENCE CHINA-TECHNOLOGICAL SCIENCES | IF: 0.747
WoS CC Cited Count: 1
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Abstract :

The research on scroll profiles theory at present mainly is aiming at the single profile and its amelioration or parameter optimization, not aiming at the natural characteristic of the profiles equation of scroll profiles itself. Thus, the intrinsic differential equation bearing on arc-length and tangent direction angle was studied. Using the inherent differential equation and general functional theory, the conversion ideas between the expression of intrinsic differential equation and the expression in Cartesian coordinate was studied, and the condition of involutes characteristic was presented. The detailed analysis of four typical scroll profiles was given. According to the four typical scroll profiles and based on the method of Taylor series, the unified formation of general functional integration scroll profiles was established, which perfected general theory of scroll profiles increasingly. The envelope method to seek conjugation engagement profiles was studied. The unified general functional equation of scroll profiles represented the admissible function scrolls and the conjugation engagement characteristic of which was studied. The engagement condition of conjugation scroll profiles and the expression in Cartesian coordinate of conjugation scroll profiles of general functional integration scroll profiles were educed. Therefore, the restriction of inherent characteristics of single scroll profiles model is broken through. Solid modeling and machine tool path simulation can bridge the gap between design and manufacture which is essential for the design and manufacture of scroll compressors. With this method a perfect solid model can be achieved, which leads to an optimal design in terms of quality, delivery time and cost. The presentation of unified formation of general functional integration scroll profiles represents foundation factor of instinct characteristics of scroll profiles, which widens the design method of scroll compressor for automobile air conditioning.

Keyword :

expression transform automobile air conditioning application analysis integrated design scroll compressor profiles

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GB/T 7714 Wang LiCun , Du Li , Zhang XianMing et al. A study on integrated design conjugation profiles application analysis of scroll profiles for automobile air conditioning [J]. | SCIENCE CHINA-TECHNOLOGICAL SCIENCES , 2011 , 54 (6) : 1496-1504 .
MLA Wang LiCun et al. "A study on integrated design conjugation profiles application analysis of scroll profiles for automobile air conditioning" . | SCIENCE CHINA-TECHNOLOGICAL SCIENCES 54 . 6 (2011) : 1496-1504 .
APA Wang LiCun , Du Li , Zhang XianMing , Wang XuDong , Chen Bin , Hussain, Sinan H. . A study on integrated design conjugation profiles application analysis of scroll profiles for automobile air conditioning . | SCIENCE CHINA-TECHNOLOGICAL SCIENCES , 2011 , 54 (6) , 1496-1504 .
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