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transfer     
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  传递
    Study on the Transfer Process in Heat Pipe Bioreactor
    热管生物反应器的传递过程研究
短句来源
    Mass Transfer of Oxygen iuner Gas Bubbles in Gas-Injection-Refining Process
    气体喷吹精炼过程中气泡内氧的传递
短句来源
    A Study on the Application of Z—Transfer Function Method for Heat Transfer Engineering in Furnace
    Z—传递函数法在窑炉热工技术中的应用研究
短句来源
    The Adsorption and Transfer Parameters for C_8 Aromatics measured with Pulse-Response Method in Chromatography
    色谱扰动-响应法测定C_8芳烃的吸附和传递参数
短句来源
    ANALOGY AND COMPUTER SIMULATION FOR SIMULTANEOUS MASS AND HEAT TRANSFER PROCESSES
    质量、热量同时传递过程的类比分析与计算机模拟
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    Study of A New Mass Transfer Model of CFD and Its Application on Distillation Tray
    流体力学传计算新模型的研究和在塔板上的应用
短句来源
    Study on Enhancement of Gas-Liquid Mass Transfer by Fine Particles in Slurry System
    浆料体系中细颗粒增强气液传研究
短句来源
    Study of Model for Heat and Mass Transfer in Solid Oxide Fuel Cell
    固体氧化物燃料电池传热传模型研究
短句来源
    Study on the Mass Transfer Performance in the Membrane Absorption Process
    膜吸收过程传性能的研究
短句来源
    A Study on the Stability and the Mass Transfer of Liquid Surfactant Membranes during Extraction
    乳化液膜体系在分离过程中的稳定性及传研究
短句来源
更多       
  
    Study of A New Mass Transfer Model of CFD and Its Application on Distillation Tray
    流体力学质计算新模型的研究和在塔板上的应用
短句来源
    Study on Enhancement of Gas-Liquid Mass Transfer by Fine Particles in Slurry System
    浆料体系中细颗粒增强气液质研究
短句来源
    Study of Model for Heat and Mass Transfer in Solid Oxide Fuel Cell
    固体氧化物燃料电池质模型研究
短句来源
    Study on the Mass Transfer Performance in the Membrane Absorption Process
    膜吸收过程质性能的研究
短句来源
    A Study on the Stability and the Mass Transfer of Liquid Surfactant Membranes during Extraction
    乳化液膜体系在分离过程中的稳定性及质研究
短句来源
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  传热
    Study of Model for Heat and Mass Transfer in Solid Oxide Fuel Cell
    固体氧化物燃料电池传热传质模型研究
短句来源
    Studies on Heat Transfer and Evaporation and Applications of Wiped Thin-film Evaporator with an Inner Condenser
    内冷式刮膜薄膜蒸发器传热蒸发与应用研究
短句来源
    A MODEL OF HEAT TRANSFER IN MOVING BED
    移动床传热模型
短句来源
    CRITERIONS FOR THERMODYNAMIC OPTIMIZATION OF HEAT TRANSFER SYSTEM
    传热系统的热力学优化准则
短句来源
    Studies on the Convective Heat Transfer the Firing Zone of Tunnel Kiln by Model Technioues
    隧道窑烧成带对流传热模型研究
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      transfer
    Using these monomial bases we prove that the image of the transfer for a general linear group over a finite field is a principal ideal in the ring of invariants.
          
    The weighted inequalities allow us to transfer the result to the ergodic case, when the operator is induced by a mean bounded, invertible, positive groups.
          
    A gene regulatory mechanism has been proposed in which steroid hormones and certain other drugs bind to nuclear receptor proteins followed by transfer to DNA where they are inserted between base pairs.
          
    3D QSAR STUDIES OF INHIBITORS OF CHOLESTEROL ESTER TRANSFER PROTEIN (CETP) BY CoMFA, CoMSIA AND GFA METHODOLOGIES
          
    A boundary element method for a nonlinear boundary value problem in steady-state heat transfer in dimension three
          
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    An experimental investigation was made of temperature gradients in air streams being cooled while flowing through a cylinder of diameter 81 mm packed with high thermal conductivity (iron and copper) and low thermal conductivity solids of spheres, cylinders and Raschig rings. From the measured temperature gradients at various bed depths and radial posi-tions, and for the different particle sizes and flow rates, the effective thermal conductivity Ke, and the heat transfer coefficient of the wall hw, were...

    An experimental investigation was made of temperature gradients in air streams being cooled while flowing through a cylinder of diameter 81 mm packed with high thermal conductivity (iron and copper) and low thermal conductivity solids of spheres, cylinders and Raschig rings. From the measured temperature gradients at various bed depths and radial posi-tions, and for the different particle sizes and flow rates, the effective thermal conductivity Ke, and the heat transfer coefficient of the wall hw, were determined by the integral, graphical and the direct-current electric analog methods.

    作者用低导热系数(包括玻璃、磁)的球体、圆柱体、环柱体与高导热系数(包括铜、铁的球体,圆柱体为填充物,以空气为传热介质,使其在管径为81毫米之填充床层内冷却,改变流体流量,床层高度及填充物大小,通过试验测出在不同的条件下床层的径向温度分布,并应用积分法、直流电模拟计算法及图解法求得床层的有效导热系数及管壁薄膜传热系数.在试验范围:低导热系数填充物D_P/D_t自0.074—0.254;高导热系数填充物D_p/D_t自0.12—0.2,L/D_t自5—15,Re汇数自130—1400,即直线速度自0.5—1.6公尺/分,若以床层进出口平均温度之数学平均值为定性温度,则床层之有效导热系数及管壁薄膜传热系数可分别归纳于下式:低导热系数填充物:K_e=0.182(D_t/D_p)~(0.45)Re~(0.75),h_w=65e~(-4)(D_p/D_t)(K/D_t)((D_t/L))~(0.2)Re~(0.4)高导热系数填充物:K_e=0.3k(D_t/D_p)~(0.6)Re~(0.72),h_w=5.1(K/D_t)(D_t/D_p)~(0.8)(D_t/L)~(0.1)Re~(0.46)填充物形状对K_e及h...

    作者用低导热系数(包括玻璃、磁)的球体、圆柱体、环柱体与高导热系数(包括铜、铁的球体,圆柱体为填充物,以空气为传热介质,使其在管径为81毫米之填充床层内冷却,改变流体流量,床层高度及填充物大小,通过试验测出在不同的条件下床层的径向温度分布,并应用积分法、直流电模拟计算法及图解法求得床层的有效导热系数及管壁薄膜传热系数.在试验范围:低导热系数填充物D_P/D_t自0.074—0.254;高导热系数填充物D_p/D_t自0.12—0.2,L/D_t自5—15,Re汇数自130—1400,即直线速度自0.5—1.6公尺/分,若以床层进出口平均温度之数学平均值为定性温度,则床层之有效导热系数及管壁薄膜传热系数可分别归纳于下式:低导热系数填充物:K_e=0.182(D_t/D_p)~(0.45)Re~(0.75),h_w=65e~(-4)(D_p/D_t)(K/D_t)((D_t/L))~(0.2)Re~(0.4)高导热系数填充物:K_e=0.3k(D_t/D_p)~(0.6)Re~(0.72),h_w=5.1(K/D_t)(D_t/D_p)~(0.8)(D_t/L)~(0.1)Re~(0.46)填充物形状对K_e及h_w的影响,仅需将D_p用 D’_p代替,同时把K_e式中之常数0182及03各改为0.22及0.38即可.直流电模拟计算法系利用电压表示温度,电阻表示传热阻力,电流表示热的流动,是简单的模拟计算机的一种,它在近代工程上的应用日渐广泛,有了传热数据应用它来求床层的温度分布异常方便.

    In this paper the influence of Pr number, shape and thermal conductivity of the packing material and the bed height on the heat transfer coefficients of the packed beds have been thoroughly studied when air and water were cooled through packed tubes. In order to offer the data for the design of fixed bed, catalytic reactors and packed heat exchangers operated at high space velocity, high Re number was adopted.

    填充床层之传热系数包括二重阻力,即床层内部的传热阻力和床层与管壁界面间薄膜的传热阻力。本文以空气和水为传热介质,使其流过填充床层冷却,改变操作条件和床层构造,考察了Pr准数,床层高度、填充物的导热系数和形状对於传热系数的影响。由於高速固定床接触反应器和填充热交换器逐渐在工业上取得了应用,高线速下的传热数据需要迫切,因此试验的范围采用了较大的Re准数。 玻璃或磁质等低导热系数球状填充物的传热系数可归纳成: 试验范围: D_p/D_t=0.08~0.5; L/D_t=10~30; Re=250~6500; Pr=0.722~4.8 铜、铁等高导热系数球状填充物的传热系数可归纳成: 试验范围; D_p/D_t=0.1~0.5; Re=300~10,000;   L/D_t=10~30 在此范围内所有试验皆经过二次以上的重复试验,误差一般不大於5%。 以圆柱体为填充物的传热系数,仅须将修正Re准数中的几何量D_p,改成与圆球具有相同的几何表面面积的球径D'_p即可。 以上二式说明流体的物理性质即Pr准数对传热系数的影响不很显著,床层高度对传热系数的影响:低导热系数填充...

    填充床层之传热系数包括二重阻力,即床层内部的传热阻力和床层与管壁界面间薄膜的传热阻力。本文以空气和水为传热介质,使其流过填充床层冷却,改变操作条件和床层构造,考察了Pr准数,床层高度、填充物的导热系数和形状对於传热系数的影响。由於高速固定床接触反应器和填充热交换器逐渐在工业上取得了应用,高线速下的传热数据需要迫切,因此试验的范围采用了较大的Re准数。 玻璃或磁质等低导热系数球状填充物的传热系数可归纳成: 试验范围: D_p/D_t=0.08~0.5; L/D_t=10~30; Re=250~6500; Pr=0.722~4.8 铜、铁等高导热系数球状填充物的传热系数可归纳成: 试验范围; D_p/D_t=0.1~0.5; Re=300~10,000;   L/D_t=10~30 在此范围内所有试验皆经过二次以上的重复试验,误差一般不大於5%。 以圆柱体为填充物的传热系数,仅须将修正Re准数中的几何量D_p,改成与圆球具有相同的几何表面面积的球径D'_p即可。 以上二式说明流体的物理性质即Pr准数对传热系数的影响不很显著,床层高度对传热系数的影响:低导热系数填充物的传热系数随L/D_t比率之减小而逐渐增大,L/D_t>30,影响甚微,L/D_t=20,误差约7%,L/D_t=10,误差可达15%;高导热系数填充物的传热系数随L/D_t的增大略有增大的趋势,但影响?

    On the basis of the analysis of the previous paper, the present work poses a series of problems in dilute-phase heat transfer technique as applied to chemical metallurgy, and illustrates its practical aspects through pilot-scale measurements and experiments in the development of new metallurgical processes.In actual practice, particles are more often than not in accelerative motion while heat is being transported between them and the surrounding fluid medium, with the result that the transfer coefficient...

    On the basis of the analysis of the previous paper, the present work poses a series of problems in dilute-phase heat transfer technique as applied to chemical metallurgy, and illustrates its practical aspects through pilot-scale measurements and experiments in the development of new metallurgical processes.In actual practice, particles are more often than not in accelerative motion while heat is being transported between them and the surrounding fluid medium, with the result that the transfer coefficient seldom retains a constant value. An acceleration integral∫F(x)=integral from n=Re_0 to (Re_0+Re)((Re_s~xdRe_s)/(Ar_(Δρ)-fRe_s~2)) is proposed from which four dimensionless groups are derived (Eqs. (28), (29), (31), and (36)) which permit comparison of analogous heat transfer equipment on a generalized basis. Towards this end, Eq. (43) is derived for calculating the effectiveness of heat recovery for multi-layer dense-phase fluidization with full allowance for heterogeneous nonuniformity, so that the dense-phase operation may be compared directly with the corresponding dilute-phase operation as given by Eqs. (26) and (26a).After heat transfer measurements had been conducted on pilot scale, the authors applied the dilute-phase technique to heat transfer problems in the magnetizing roasting of low-grade iron ores and the sulfatizing roasting of an iron ore containing small amounts of copper and cobalt. In both cases pilot plant results indicate that the capital investment of dilute-phase equipment would be much lower that those of the conventional counterparts of corresponding capacities. Finally, it is concluded that dilute-phase technique is a new, yet rapidly developing field in the application of fluidization to chemical metallurgy, and a few important problems are proposed for future investigation.

    在前文的分析基础上,提出了将稀相技术应用于流态化冶金中換热过程时的一系列問題,并通过稀相換热的扩大实驗和中間工厂实践进一步闡明稀相流态化的应用。在工艺換热过程中顆粒在加速度状态下与周围的流体进行換热,因此換热系数并非为常数。本文通过一个加速度积分∫F(x)=integral from n=Re_0 to (Re_0+Re)((Re_s~xdRe_s)/(Ar_(Δρ)-fRe_s~2)),对換热設备的換热能力和压降特性用四个无因次数加以統一描述[式(28),(29),(31)和式(36)]。将稀相換热与多层浓相流态化床比較时,本文为流速的非齐次性提出式(43)所表示的多层流态化床的热量回收率关系,使之可与稀相換热[式(26)和式(26a)进行直接比較]。在进行稀相換热扩大实驗后,将稀相技术应用于貧铁矿的磁化焙烧和含低品位銅鈷氧化鉄矿的硫酸化焙烧中間工厂中,并指出采用稀相換热的設备投资仅为习俗設备的一个很小的百分数。指出稀相技术是一个流态化冶金中正在开始发展的領域,其中許多問題尚待进一步的探索和研究。

     
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