查询词典 convection heat transfer

The association effect of inert gas and gas phase acetic acid-water in condensing process was considered, the heat and mass transfer behavior of the heat exchangers at every step and the influence of heat and mass transfer on the design of heat exchangers were analyzed for the condensing process of acetic acid, water, and mixed nitrogen vapor in the condenser in the PTA oxidation process.

针对PTA氧化反应中冷凝器内的醋酸、水和氮气混合蒸气冷凝过程，考虑冷凝过程中惰性气体和气相醋酸-水缔合效应，分析了各级换热器内传热传质行为以及传递对换热器设计的影响。

On the basis of structural features and heat transfer characteristics of a spiral-grooved tube heat exchanger,a three-dimensional geometric model was established for the flow and heat transfer in a heat exchanger with water serving as its working medium.

根据螺旋槽管换热器结构特点及传热特性，建立了以水为工质的换热器流动与传热的三维几何模型。运用有限元分析软件ANSYS模拟出换热器在换热过程中速度场与温度场的状况，分别得到了螺旋槽管内壁与外壁的对流换热系数。

This new type heat pipe was applied in a puddling process. The waste flue gas from the hot blast stove was used as the hot source to heat the cold mixture of compressed air and coal powder. The observed practical performance of the heat pipe showed a good agreement with the design expectation, which verified feasibility of using the separated type heat pipe for the heat transfer of the solid powder.

这种新型的分离式热管换热器应用于一个固相粉末换热系统——利用高炉热风炉的废烟气加热高炉喷煤用的空气和煤粉的混合物，实际运行工况与设计结果具有良好的一致性，可见利用套管结构的分离式热管作为以固相粉末为换热介质时的传热元件是完全可行的。

And other peripheral product: Epson Chip Resetter; Epson Auto Reset Chip; The printer ink, water transfer ink, Sublimation ink and heat press machineMug heat press machine, Plate heat press machine, Hat heat press machine, and Plain heat press machine.

及其他周边产品：爱普生芯片resetter ；爱普生自动复位芯片；打印机油墨，水转移油墨，升华油墨及热压机（杯热压机，热板机，帽子，热压机，朴素的热压机。

System uses atmosphere as low temperature heat source.It imbibes heat from atmosphere by evaporation of the refrigerating medium in vaporizer and transfers the heat to phase change materials by heat transfer unit then transfers the heat to cool water from cool water pipe.

它利用空气作为低温热源，由蒸发器内制冷剂的蒸发来吸收空气中的热量，通过传热盘管将热量传递给相变储能材料，获取盘管承压，使贮罐形状不受压力容器限制贮能。

On the basis of analyzing the thermodynamic properties and cycle performance of pure refrigerants, the paper optimizes their concentration while screening NARMs used in wide variable-temperature heat source. The practical applications of NARMs, such as R22/R123, R123/R125 etc., are studied in geothermal heat pump, seawater heat pump, air dehumidification system and dual-evaporator domestic refrigerator. The results show that the NARMs can match the limitation of a pinch point at the air-side exit of heat exchanger, reduce the unreasonable heat transfer temperature difference, and improve the COP of system. The above conclusion is proved by measuring the cycle performance of R12, MP39 and R11/R22 in a two-evaporator experimental system.

其次，本文在工质热物性和变工况循环性能分析基础上，筛选和优化了适应外部大变温热源约束条件的非共沸混合工质及其浓度配比；讨论了相变温差较大的非共沸混合工质（如R22/R123、R123/R125等）在地热源供热热泵、海水源供热热泵、双门冰箱和热泵空气除湿的应用，计算分析表明制冷与热泵系统采用相变温差较大的非共沸混合工质有利于弱化传热过程的&窄点&的约束，减小传热过程中的不合理温差，提高系统COP值；通过建立双蒸发温度循环系统试验装置，对R12、R22/R11和R22/R152a/R124循环性能进行实验研究，结果与理论分析一致。

Self-Exciting Mode Oscillating-Flow Heat Pipe, also called pulsating heat pipe or oscillating heat pipe, is a novel heat transfer device that has an excellent heat transport performance.

自激振荡流热管也称为脉动热管，是一种新型高效的传热元件。本文提出了采用脉冲加热代替常规连续热源加热强化自激振荡流热管传热的方法，并对其进行了实验研究。

Convection 对流 Now that we have some heat, we can use this to cause convection.

既然我们有了一些热，我们就可以用这些来产生对流。

In Gregory scheme, not only the importance of the moist static energy is taken into account, but also the common difficulty of the moist convective adjustment scheme, the determination of the temperature profile, is obviated. At the same time, it can give the vertical profile of the apparent heat source Q〓 and apparent moisture sink Q〓. Gregory scheme has the clear physical image that includes the cumulus updrafts, cumulus downdrafts,cumulus induced subsidence in the environmental air, entrainment,detrainment and evaporation. In addition, the interaction between the cumulus and the environment is described by one-dimensional bulk model. It is simpler than the Arakawa-Schubert scheme and has no difficult to decide the spectrum of clouds accurately.It is propitious to operational use because of its simple calculation. Finally, Gregory scheme is not only suitable for moist convection of all types, but also for dry convection.

在该方案中，既强调了湿静力能能量的重要性，又回避了给定临界温度廓线的困难，并且还能给出真实的视热源Q1，视水汽汇Q2的垂直廓线；同时Gregory方案又具有很清晰的物理图象—积云中的上升运动，下沉运动，环境中的补偿下沉运动，以及卷入，卷出和蒸发等；此外，Gregory方案用总体云群模式来描述云与环境的相互作用，比型积云参数化方案简单，它避开了型方案中云谱需要精确设置的麻烦问题，计算容易，简便；最后，Gregory方案在湿对流中适用于浅，深，中不同的对流深度，并且也适用于干对流过程。

The cases of strong and weak convection are selected based on the interannual variation of OLR. The different evolution characteristics of Qnet in this two cases also mostly owe to Qlat and Qsw. And Qnet should have some relation with OLR, because of their coherent variety that the increaser heat flux from the ocean to atmosphere relates to the enhanced convection.

Qnet在强、弱对流年间的差异随时间的变化同OLR在强、弱对流年间的差异随时间的变化可能有一定的相关性，表现在OLR 30-60天低频分量差异的负值区和Qnet差异的正值区基本一一相对应，表明大气从海洋得到的热量增加时，其上空的对流活动加强，数值上OLR和Qnet呈现较好的负相关性。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48