Combining with particle impact heat transfer model, DEM method is also used to systematically simulate the heat transfer process in fluidized bed at the level of particle.
将DEM方法与颗粒碰撞传热模型结合,在颗粒层次上对密相流化床内的传热过程进行了较为系统的数值研究。
The combustion and heat transfer in CFB boiler are related with the bed material, while the bed material is formed during the coal combustion, fragment and attrition processes.
循环流化床锅炉炉内的燃烧及传热与炉内床料的状态密切相关,而炉内床料主要是由燃煤含有的矿物组分经过燃烧、爆裂和磨耗过程形成的。
According to the heat transfer of conduction, convection and radiation in between gas, kiln wall and clinker bed, established a one dimensional thermal model for the alumina clinker kiln.
综合考虑烟气、窑壁和料床间的传导、对流和辐射传热,建立了氧化铝熟料窑内一维传热模型。
Experimental and theoretical investigations on boiling heat transfer in liquid saturated porous bed heated from below are conducted.
对底部加热的被液体浸透的多孔物料床中的沸腾换热进行了实验和理论分析。
In fluid bed, both particles and carrier gas occur violent turbulence so that the heat transfer and mass transfer in the furnace are speeded.
在流化床中,粒子和炉气发生剧烈的紊流运动,加快了炉内传热和传质过程。
In the study of heat transfer in CFB, most researchers focus on the heat transfer between the bed and the wall, few people attach importance to the gas-solid interfacial heat transfer.
在循环流化床内的传热研究方面,大多数研究者从事的是床层与换热表面之间的传热研究,而忽略了床中重要的气固两相间的传热。
Different heat transfer coefficients have been obtained from a series of experiments aimed to simulate the heat transfer to molten iron droplets in the coke bed of a cupola.
本文通过模拟研究,得出了冲天炉过热区内对铁水的四种传热方式的传热系数。
Movement of bubbles and particles around tube immersed in a fluidized bed is closely re lated to tube heat transfer and tube abrasion.
气泡和颗粒在流化床水平理管周围的运动行为与埋管传热和埋管磨损关系十分密切。
Flow boiling heat transfer mechanism in a three-phase circulating fluidized bed evaporator is analyzed, and then the heat transfer model used for wheat straw black liquor is proposed correspondingly.
建立了适用于烧碱法麦草浆黑液系统的三相循环流化床传热模型。
In the adsorption refrigeration system, three enhanced heat transfer models of tube adsorbent bed are designed.
介绍了吸附式制冷系统中吸附床的三种强化传热模型结构设计方案。
The results of the oxygen transfer ratio test show that the oxygen transfer ratio of pipe-cone shape filter bio-bed can increase by 33.33 %.
通过氧转移效率试验表明,管锥形填料生物床可提高33.33%的氧转移效率。
It lays a foundation for modeling of flowing and combustion as well as heat transfer and abrasion of oil shale circulating fluidized bed boiler dilute zone.
同时为进一步建立适合油页岩的循环流化床燃烧室稀相区的流动、燃烧、传热、磨损模型奠定了基础。
The overall height of catalyst bed as well as the optimal feeding point was obtained for different detritiation efficiency under specific mass transfer coefficient of catalysts.
根据不同的催化剂传质性能,计算了为达到特定脱氚率和电解池浓缩倍数所要求的交换床总高度和进液位置。
In practice, choosing the static height of the bed layer and the frequency of the gas pulsation properly can increase the heat transfer coefficient.
在实际操作过程中,选择合理的床层静止高度和气流脉动频率对提高传热系数有利。
Presents an optimal design method for PCM (phase change material) packed bed based on the heat transfer characteristics.
根据相变材料蓄冷堆积床的传热特性,提出了一种堆积床的优化设计方法。
Combustion and heat transfer character are the technical basis of combustion in circuiting fluid bed boilers.
燃烧和传热特性是循环流化床锅炉的燃烧技术基础。
The adsorption bed structure filling sorbent in tube and flowing heat transfer media out of tube was designed and the corresponding mathematical model was established.
设计了管内填充吸附剂,管外走传热介质的新型吸附床结构,建立了相应的数学模型。
The reaction characteristics of synthesizing methyl chlorsilane by direct method and the heat transfer of the fluid bed in the reactor were analyzed.
分析了直接法合成甲基氯硅烷的反应特点及反应器内流化床的传热过程。
In this paper, the heat transfer efficiency of the adsorption bed with different structure was studied with theoretic and experimental approaches.
通过改变液氮在传热过程中的流动状态,改善液氮与吸附床之间的热交换效率。
This paper has put forward a new type of finned tubes impact gas-solid separator with enhancing heat transfer behavior which can be used in Circulating Fluldized Bed (CFB).
本文提出了一种应用于循环流化床,兼有强化传热的鳍片管束惯性分离器。
The characteristic of mass transfer in absorption of soluble gas is studied in the rotating packed bed.
利用离心传质分离装置—旋转填料床,对易溶气体吸收过程的传质性能进行了实验研究。
An experimental study was conducted on the cross-flow heat transfer in a fixed-bed, and simulated by a two-dimensional model.
对固定床中流体与换热管呈错流流动的传热进行了实验研究,并以二维传热模型进行模拟。
A mathematical model for the heat and mass transfer in the pyrolysis process of the biomass fuel bed was developed in this paper. Heat and mass transfer characteristics of the process were discussed.
通过分析生物质热解过程的传热传质特点,建立了生物质燃料层热解过程的传热传质数学模型。
In fluidized bed combustion boilers a suspension section not only serves as a heat transfer section but also plays its role as a combustion one.
在流化床锅炉中,悬浮段不仅可以作为传热区段,而且也有燃烧作用。
Objective To identify the orthopedic disease needing rehabilitation nursing bed and formulate admission and transfer criteria for different disease.
目的确定骨科患者需入住康复护理床位的病种,并制定各病种患者入住、转出评准。
The fluidized-bed heat exchanger within which the solid particles are kept in a fluidized condition by the fluid medium, so as to achieve a good heat transfer has a broad prospect for its application.
在流化床换热器中,固体颗粒在流化介质作用下保持流化状态,因此有着良好的传热性能,应用前景广阔。
Mass transfer kinetics of dehumidification in an adsorption bed during close air circulation have been investigated utilizing silica and 4a molecular sieves.
用硅胶和4a分子筛吸附剂进行气流封闭循环实验,对吸附床的除湿传质动力学进行了研究。
The results show that the heat transfer rate in a pulsed fluidized bed is 15%greater than that in a normal fluidized bed. The bigger the particles, the higher the heat transfer efficiency.
对脉动流化床内换热面与床层的传热特性进行了试验研究,试验中观察到的脉动床最大传热速率比普通流化床的传热速率提高15%左右,对于较大直径的颗粒,脉动流化床的传热效果更突出;
It may be seemed that the heat transfer model presented in this paper would reflect the heat transfer process of the immersed tube in the fluidized bed combustion boiler.
说明本文所介绍的传热模型在一定程度上反映了沸腾燃烧锅炉内埋管传热过程。
The model and results are helpful to reveal heat and mass transfer characters of the adsorbent bed and to provide theoretical basis for optimal design of this system.
该数学模型和计算结果有助于深入认识吸附床的传热传质特性,以期能为吸附床的具体设计提供理论依据。
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