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Reply to“Comment on ‘Recent progress in thermodynamics of radiation—Exergy of radiation,effective temperature of photon and entropy constant of photon'”

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Science China(Technological Sciences) 2010年第3期53卷 878-880页

作者： CHEN ZeShao 1,MO SongPing 1,2 &HU Peng 1 1Department of Thermal Science and energy Engineering,University of Science and Technology of China,Hefei 230027,China 2 faculty of Material and energy,Guangdong University of Technology,Guangzhou 510006,China Department of Thermal Science and energy Engineering University of Science and Technology of China Hefei China faculty of Material and energy Guangdong University of Technology Guangzhou China

Two counterexamples in Liu's comment on'Recent Progress in Thermodynamics of Radiation—Exergy of radiation,effective temperature of photon and entropy constant of photon'are analyzed and the incorrect applications of the related concepts are *** similarities and differences between the concepts of the effective temperature of photon,the exergy of spectral radiation,the entropy constant of photon and the macroscopic concepts of temperature,exergy,and entropy are further *** duality of radiant energy,micro-state quantum characteristic and macro-state thermal characteristic is presented.

关键词： thermodynamics of radiation photon entropy

NUMERICAL AND EXPERIMENTAL STUDY OF FLOW AROUND TWO PLATES HAVING ASYMMETRIC BEVELED TRAILING EDGE

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Journal of Hydrodynamics 2008年第5期20卷 624-628页

作者： MOSALLEM M. M. Department of Mechanical Power Engineering and energy Faculty of Engineering Minia University Minia

The flow around two plates having asymmetric beveled trailing edge placed side-by-side in a uniform stream were investigated both numerically and experimentally. Two plates with spacing ratio of 1.0 and beveled trailing edge of angle 20° were tested at Reynolds numbers equal to 3.97×10^4. The numerical simulation results displayed that the flow separates on one plate beveled trailing edge surface. The vortex formation and shedding from this plate led to deflecting the flow toward the other plate and consequently the wake behind the plates showed an asymmetric development. The photographs obtained from the flow visualization confirmed the numerical results concerning the flow separation and vortex formation. It was also found that the computed pressure distribution on the two plate surfaces was different, particularly on the beveled trailing edge surfaces and on the fiat sides.

关键词： Flow wake two plates vortex shedding beveled trailing edge

Activity Calculation in Complex Metallurgical Molten Slag Systems Based on Regular Solution Model

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Journal of Iron and Steel Research International 2012年第3期19卷 6-10页

作者： HOU Yan-qing,XIE Gang,TAO Dong-ping,YU Xiao-hua,LI Rong-xing (faculty of Metallurgical and energy Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China) faculty of Metallurgical and energy Engineering Kunming University of Science and Technology Kunming Yunnan China

The activity of FetO is very important in ironmaking and steelmaking process. In order to predict the activ- ity of Fe, O and optimize the operation conditions in ironmaking and steelmaking process, by application of regular so lution model in molten slag systems, FeO-Fe2 O3-SIO2 ternary system, FeO-Fe2 O3-SiO2-CaO and FeO-Fe2 O3-SiO2-NiO quaternary systems have been studied by the chemical equilibrium between H2/H20 gas mixture and liquid slag con tained in solid iron. The values of interaction energy between cations concerning steelmaking slags have been deter- mined by application of ferric-ferrous iron equilibrium and iron-ferric iron equilibrium. And then the activity of Fe, O can be calculated. The results show that the relative error is 3.9% in FeO-Fe203-SiO2 system and 18% in FeO- Fe203-SiO2 CaO system. The prediction of activities of FetO in the systems are in good agreement with the measure- ments and the regular solution model is valid for predicting the activity of FetO in complex molten slags systems. The activity of Fe, O in FeO-Fe20a-NiO system have not been tested presently, and the calculated result can not be assessed.

关键词： regular solution model metallurgical molten slag activity

Effects of rare-earth elements on the glass-forming ability and mechanical properties of Cu_(46)Zr_(47-x)Al_7M_x(M = Ce,Pr,Tb,and Gd) bulk metallic glasses

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Rare Metals 2010年第5期29卷 444-450页

作者： XIE Zhiwei ZHANG Yongzhang YANG Yuanzheng CHEN Xianzhao TAO Pingjun faculty of Material and energy Guangdong University of Technology Guangzhou 510006 China

Cu46Zr47-xA17Mx （M = Ce, Pr, Tb, and Gd） bulk metallic glassy （BMG） alloys were prepared by copper-mold vacuum suction casting. The effects of rare-earth elements on the glass-forming ability （GFA）, thermal stability, and mechanical properties of Cu46Zr47-xA17Mx were investigated. The GFA of Cu46Zr47-xA17Mx （M = Ce, Pr） alloys is dependent on the content of Ce and Pr, and the optimal content is 4 at.%. Cu46Zr47-xA17Thx（X = 2, 4, and 5） amorphous alloys with a diameter of 5 mm can be prepared. The GFA of Cu46Zr47-xA17Gdx（x = 2, 4, and 5） increases with increasing Gd. Tx and Tp of all decrease. Tg is dependent on the rare-earth element and its content. ATx for most of these alloys decreases except the Cu46Zra2Al7Gd5 alloy. The activation energies △Eg, △Ex, and △Ep for the Cu46Zr42A17Gd5 BMG alloy with Kissinger equations are 340.7, 211.3, and 211.3 kJ/mol, respectively. These values with Ozawa equations are 334.8, 210.3, and 210.3 kJ/mol, respec- tively. The Cu46Zr45Al7Tb2 alloy presents the highest microhardness, Hv 590, while the Cu46Zr43A17Pr4 alloy presents the least, Hv 479. The compressive strength （at.f.） of the Cu46Zra3A17Gd4 BMG alloy is higher than that of the Cu46Zr43Al7Tb4 BMG alloy.

关键词： amorphous materials metallic glass rare-earth elements suction casting glass-forming ability mechanical property

土壤源热泵制冷间歇工况土壤温度响应实验研究

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太阳能学报 2009年第10期30卷 1373-1377页

作者：陈颖杨敏史保新广东工业大学材料与能源学院广州510006

在夏热冬暖的广州地区搭建了两种换热器向土壤放热的实验台,换热器埋地深度为30m,实验元件有单U和双U两种型式。连续制冷工况下,通过对两口井内土壤温度变化的研究,结果发现,开机12h后,土壤温度趋于稳定;停机12h后两个埋地换热管处的土... 详细信息

在夏热冬暖的广州地区搭建了两种换热器向土壤放热的实验台,换热器埋地深度为30m,实验元件有单U和双U两种型式。连续制冷工况下,通过对两口井内土壤温度变化的研究,结果发现,开机12h后,土壤温度趋于稳定;停机12h后两个埋地换热管处的土壤温度就可恢复约95%,但土壤温度基本得以恢复需要停机81h。在停机12h后地温恢复得极其缓慢,已没有工程应用价值。可见合理选择运行与停机时间有助于提升系统的整体换热能力和地热的综合利用率。通过实验研究发现,间歇工况下双U井单位井深换热量较之连续运行提高了25.6%,单U井单位井深换热量提高了21.8%。

关键词：土壤源热泵间歇工况双u 单u 温度响应

APPLICATION STUDY OF WATER KETTLE HANDLE INJECTION MOLDING

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APPLICATION STUDY OF WATER KETTLE HANDLE INJECTION MOLDING

Analysis on the Microstructure and Performance Evolvement of Alloyed Tool Steel Hot Rolling Strip Produced by CSP Technology

International Technology and Innovation Conference 2009

作者： KUANG Weihua1 CUI Jianqiang2 1faculty of Materials and energy Guangdong University of Technology China 2faculty of Materials and energy Guangdong University of Technology China

Injection molding is one of the most important polymer processing methods for producing plastic parts. Many factors affect the molding process and the plastic part quality. Previous attempts on prediction and process planning of injection moldings are mostly based on empirical methods. Now with the help of finite element analysis, designers can reduce costly experiment and shorten development cycle, and correctly solve manufacture problems, such as material property, product design, and mould production. Best injection location is obtained by MoldFlow analysis. Fill time, weld line, air trip are deeply studied. The simulation provides scientific and valuable injection process information and helps engineers to take right decisions when they develop the tools. At last, a mould for water kettle handle is designed, and the NC machining of the mould cavity is programmed by UG NX software.

关键词： Injection process Finite element analysis MoldFlow NC machining.

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Journal of Iron and Steel Research International 2011年第S1期18卷 621-624页

作者： CHEN Jing-hu 1,2,JIE Xiao-hua 1 (1.faculty of Materials and energy,Guangdong University of Technology,Guangzhou510006,Guangdong,China 2.Technology Center of Guangzhou Steel Group Co Ltd.,Guangzhou510380,Guangdong,China) Guangdong Univ Technol Fac Mat & Energy Guangzhou 510006 Guangdong Peoples R China Guangzhou Steel Grp Co Ltd Ctr Technol Guangzhou 510380 Guangdong Peoples R China

This thesis determinates the microstructure and inclusions of the alloyed tool steel by CSP processing with the help of *** results show that the slab microstructures are the fine branched crystalline grains and the branch width has little disparity from the surface to the central *** the product,the grain microstructures are fine pearlites and few ferrites with the pearlite space 0.4μm to 0.2μm.

关键词： compact strip production alloyed tool steel microstructure grain

Lithium intercalation/de-intercalation behavior of a composite Sn/C thin film fabricated by magnetron sputtering

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Rare Metals 2008年第5期27卷 507-512页

作者： ZHAO Lingzhi HU Shejun LI Weishan LI Liming HOU Xianhua Department of Chemistry South China Normal UniversiO Guangzhou 510006 China faculty of Material and energy Guangdong University of Technology Guangzhou 510006 China Key Lab of Technology on Electrochemical energy Storage and Power Generation in Guangdong Universities Guangzhou 510006 China Department of Mathernatics and Physics Wuyi University Jiangmen 529020 China

A tin film of 320 nm in thickness on Cu foil and its composite film with graphite of-50 nm in thickness on it were fabricated by magnetron sputtering. The surface morphology, composition, surface distributions of alloy elements, and lithium intercalation/de-intercalation behaviors of the fabricated films were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, electron probe microanalyzer （EPMA）, X-ray photoelectron spectroscopy （XPS）, inductively coupled plasma atomic emission spectrometry （ICP）, cyclic voltammetry （CV）, and galvanostatic charge/discharge （GC） measurements. It is found that the lithium intercalation/de-intercalation behavior of the Sn film can be significantly improved by its composite with graphite. With cycling, the discharge capacity of the Sn film without composite changes from 570 mAh/g of the 2nd cycle to 270 mAh/g of the 20th cycle, and its efficiency for the discharge and charge is between 90% and 95%. Nevertheless, the discharge capacity of the composite Sn/C film changes from 575 mAh/g of the 2nd cycle to 515 mAh/g of the 20th cycle, and its efficiency for the discharge and charge is between 95% and 100%. The performance improvement of tin by its composite with graphite is ascribed to the retardation of the bulk tin cracking from volume change during lithium intercalation and de-intercalation, which leads to the pulverization of tin.

关键词： lithium-ion battery anode magnetron sputtering composite film lithium intercalation/de-intercalation

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稀土化学热处理与稀土材料表面改性

稀土 2003年第3期24卷 59-63页

作者：黄拿灿胡社军广东工业大学广东广州510643

综述了稀土元素在化学热处理与某些其它表面工程领域中的应用情况,结合笔者的研究工作,介绍了稀土元素在渗碳、渗硼、离子注入、电弧离子镀等方面对工艺过程和改性效果的影响。稀土元素对钢的渗碳和渗硼过程有明显的催化作用,渗速提高20... 详细信息

综述了稀土元素在化学热处理与某些其它表面工程领域中的应用情况,结合笔者的研究工作,介绍了稀土元素在渗碳、渗硼、离子注入、电弧离子镀等方面对工艺过程和改性效果的影响。稀土元素对钢的渗碳和渗硼过程有明显的催化作用,渗速提高20%～30%;对提高渗碳层和渗硼层的品质和磨损特性、强韧性也有良好的效果。在离子注入技术中,稀土元素能使经离子束改性的材料表面硬度和耐磨性大为提高。在电弧离子镀中,对提高膜-基结合力有明显的效果。本文对稀土元素的合金化作用作了分析讨论和概括。

关键词：稀土化学热处理材料表面改性表面工程