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Numerical simulation of heat transfer process in cement grate cooler based on dynamic mesh technique

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Science China(Technological Sciences) 2016年第7期59卷 1065-1070页

作者： SHAO Wei CUI Zheng wang naihua CHENG Lin Institute of Thermal Science and Technology Shandong University

A grate cooler is key equipment in quenching clinker and recovering heat in cement production. A two-dimensional numerical model based on a 5000 t/d cement plant is proposed to for a study on the gas-solid coupled heat transfer process between the cooling air and clinker in a grate cooler. In this study, we use the Fluent dynamic mesh technique and porous media model through which the transient temperature distribution with the clinker motion process and steady temperature and pressure distribution are obtained. We validate the numerical model with the operating data of the cooling air outlet temperature. Then, we discuss the amount of mid-temperature air outlet and average diameter of clinker particles, which affect the heat effective utilization and cooling air pressure drop in clinker layer. We found that after adding one more mid-temperature air outlet, the average temperature of the air flowing into the heat recovery boiler increases by 29.04℃ and the ratio of heat effective utilization increases by 5.3%. This means heat recovery is more effective on adding one more mid-temperature air outlet. Further, the smaller the clinker particles, the more is the pressure drop in clinker layer; thus more power consumption is needed by the cooling fan.

关键词： grate cooler gas-solid heat transfer dynamic mesh numerical simulation

Thermal control system of Alpha Magnetic Spectrometer

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Science China(Technological Sciences) 2013年第10期56卷 2553-2562页

作者： CUI Zheng LUO Feng wang naihua CHENG Lin Institute of Thermal Science and Technology Shandong University

Since its installation on the International Space Station(ISS)in mid-May 2011,the Alpha Magnetic Spectrometer(AMS)has spent over two years on orbit,fully operational,collecting an enormous amount of data including the temperatures from the on-board 1118 sensors for thermal control.A large database is continuously updated and analyzed to understand the thermal behavior of the experiment in the space environment and its interaction with the *** paper specifies the design,building,analysis and testing of the thermal control system and its various components for an overview of the AMS thermal control system and its space *** given are some examples of analysis and correlation of the space environmental and ISS parameters with the thermal behaviors of various AMS components.

关键词： AMS thermal control system thermal design simulation orbital operations

Design and experimental study of thermal control system for AMS cryocoolers

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Chinese Science Bulletin 2013年第5期58卷 1200-1204页

作者： wang naihua JOSEPH Burger CHENG Lin Institute of Thermal Science Shandong University Laboratory for Nuclear Science Massachusetts Institute of Technology

The Alpha Magnetic Spectrometer(AMS) is an instrument for the international scientific experiment,composed of six detectors and 650 *** objective of AMS experiment is to search for dark matter and anti-matter in *** this paper,the thermal control system for AMS cryocoolers is designed,analyzed and experimentally *** loop heat pipes(LHPs) as the main heat dissipation component,the thermal control system has sufficient heat dissipation capability to prevent the cryocoolers from over temperature(+40℃) in hot environment,meanwhile to ensure temperatures of the cryocoolers higher than their lower limit(-20℃) in cold *** results show that the thermal control system for AMS cryocoolers functions stably satisfying design specification.

关键词： AMS实验科学实验设计规范制冷机热控系统热控制系统阿尔法磁谱仪散热能力

Effect of Humidification Water on Semi-dry Flue Gas Desulfurization

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Effect of Humidification Water on Semi-dry Flue Gas Desulfur...

好莱坞爱情喜剧:历史演进·喜剧策略·文化政治

2011 2nd International Conference on Advances in Energy Engineering(ICAEE)

作者： Xiaoping Zhang naihua wang Department of Science Shandong Jianzhu University Institute of Thermal Science Shandong University

Effects of humidification water parameters(ratio of humidification water to total water,location of humidification water) on semi-dry flue gas desulfurization removal efficiency have been experimentally *** optimal values of the parameters were obtained under the experiment conditions,which were 30%for ratio of humidification water to total water and at 6 meters above the lime slurry ***

关键词： Humification water flue gas desulfurization optimal condition

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当代电影 2018年第7期 42-48页

作者：王乃华天津工业大学副教授300387

本文梳理了好莱坞爱情喜剧的类型演进,分析了从喜剧演员主导的默片时代、三四十年代盛行的怪僻喜剧和刘别谦喜剧、新好莱坞时代伍迪·艾伦的现代主义喜剧一直到90年代后的复兴时期各个阶段的类型特点与发展演进;探讨了好莱坞爱情喜剧如... 详细信息

本文梳理了好莱坞爱情喜剧的类型演进,分析了从喜剧演员主导的默片时代、三四十年代盛行的怪僻喜剧和刘别谦喜剧、新好莱坞时代伍迪·艾伦的现代主义喜剧一直到90年代后的复兴时期各个阶段的类型特点与发展演进;探讨了好莱坞爱情喜剧如何采用性别策略建构其喜剧性,并从文化政治的角度分析了性别斗争背后的意识形态置换术和性别意识形态。

关键词：好莱坞爱情喜剧演进喜剧策略意识形态

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《风雪狼道》:主旋律电影的类型化探索

当代电影 2008年第5期 25-27页

作者：王乃华中国传媒大学级博士研究生***

在2007年度的国产电影中，《风雪狼道》是一部值得关注的作品。影片属抗灾救援题材的主旋律电影，但由于借鉴了惊险／灾难片的类型化策略，又兼具警匪片、西部片的元素，使得这部成本不高（550万元人民币）的主旋律电影具有一定的观赏... 详细信息

在2007年度的国产电影中，《风雪狼道》是一部值得关注的作品。影片属抗灾救援题材的主旋律电影，但由于借鉴了惊险／灾难片的类型化策略，又兼具警匪片、西部片的元素，使得这部成本不高（550万元人民币）的主旋律电影具有一定的观赏性，实现了主旋律电影的商业化改造，为中小成本主旋律影片的类型化提供了一个探索的范例。

关键词：主旋律电影类型化主旋律影片商业化改造国产电影灾难片警匪片西部片

Operation characteristics of AMS-02 loop heat pipe with bypass valve

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Science China(Technological Sciences) 2011年第10期54卷 1813-1819页

作者： wang naihua Joseph BURGER LUO Feng CUI Zheng XIN GongMin DU WenJing SONG JiWei CHEN Yan CHENG Lin lnstimte of Thermal Science and Engineering Shandong University Jinan 250061 China Laboratory for Nuclear Science MIT at PH Department CERN Geneva CHI211 Switzerland

Loop heat pipes （LHPs） were designed for the alpha magnetic spectrometer （AMS-02） to dissipate heat from the cryocoolers. A bypass valve is applied to the LHP to keep the cryocooler temperature above its limit （-20℃） in cold environment. Extensive experiments were performed on operation characteristics of LHPs with the bypass valve for AMS-02 during thermal vacuum and thermal balance （TVTB） test. We found that the bypass valve can start up successfully in cold environment. With the bypass valve, the evaporator temperature is stable and can meet the requirement of the cryocooler. We analyzed three operating modes of the bypass valve. Set point temperature and regulation temperature shifts were observed and their relations with the bypass valve temperature were given.

关键词： alpha magnetic spectrometer loop heat pipe bypass valve operation characteristic

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高温高压喷雾闪蒸的蒸发特性

化工学报 2016年第5期67卷 1771-1777页

作者：季璨王乃华崔峥程林山东大学热科学与工程研究中心山东济南250061

基于新型高温高压喷雾闪蒸实验台,以水为工质,研究初始条件和运行条件对闪蒸蒸发特性的影响。首次将液体初始温度提高至100℃以上,将闪蒸罐运行压力保持为正压,并使用具有独特双S形叶片的涡旋实心锥喷嘴,将液体向上或向下喷入闪蒸罐。... 详细信息

基于新型高温高压喷雾闪蒸实验台,以水为工质,研究初始条件和运行条件对闪蒸蒸发特性的影响。首次将液体初始温度提高至100℃以上,将闪蒸罐运行压力保持为正压,并使用具有独特双S形叶片的涡旋实心锥喷嘴,将液体向上或向下喷入闪蒸罐。实验过程中液体初始温度为135-150℃,闪蒸压力分别为121、126、131、136、141、146 k Pa,液体过热度为30-46℃。实验结果表明,闪蒸蒸汽流量随初始温度的提高而增大,随闪蒸压力的提高而减小。液体向下喷射比向上喷射产汽量更高,蒸汽带水更少。闪蒸效率随过热度呈线性增长,在大量实验数据基础上拟合出二者之间的经验公式。实验结果为高温高压喷雾闪蒸的工业应用提供借鉴。

关键词：喷雾闪蒸高温高压影响因素闪蒸效率相变两相流蒸发

Jakob数在高温高压闪蒸过程中的作用及影响

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化工学报 2016年第10期67卷 4153-4159页

作者：季璨王乃华崔峥程林山东大学热科学与工程研究中心山东济南250061

基于新型高温高压喷雾闪蒸实验台进行变工况实验,选取量纲1的Jakob数(Ja),即相变过程可用显热与蒸发潜热之比作为闪蒸过程的特征数,研究不同实验条件下闪蒸效率随Ja的变化规律。发现Ja越大,闪蒸效率越高,闪蒸越剧烈。闪蒸效率随液体初... 详细信息

基于新型高温高压喷雾闪蒸实验台进行变工况实验,选取量纲1的Jakob数(Ja),即相变过程可用显热与蒸发潜热之比作为闪蒸过程的特征数,研究不同实验条件下闪蒸效率随Ja的变化规律。发现Ja越大,闪蒸效率越高,闪蒸越剧烈。闪蒸效率随液体初始温度的提高而增大,随闪蒸压力的提高而减小,这两种现象均与Ja的物理意义密切相关。闪蒸效率和Ja均是过热度的增函数。在过热度相同的前提下,较高的初始温度和闪蒸压力的组合更有利于闪蒸。综合实验数据提出闪蒸效率与Ja之间的经验公式。实验结果在高温高压闪蒸领域有较强通用性,可为其在工业上的应用提供参考。

关键词：闪蒸高温高压 Jakob数闪蒸效率相变蒸发两相流