查询词典 convection heat transfer

On heat-transfer analysis, the focus is on the analysis of the effect of heat-transfer mechanism, ash and thermal equilibrium and ash concentration on heat transfer.

在传热分析中，着重分析了传热机理，灰、热平衡及灰浓度对传热的影响。

If heat and mass transfer separation absorber is used,its heat transfer areas is less than 30% compare to the traditional one,greatly improve absorber s heat transfer effect.

吸收器是溴化锂吸收式制冷循环中最大的部件，传统吸收器换热面积占机组的40%左右，采用传热传质分离吸收器，其传热面积不到传统吸收器的30%，大大改善了吸收器的传热效果。

The heat transfer coefficient in the different water press, water flux and compared with the actual heat transfer coefficient the error in 5%~9% are got in the tests, It is shown that the tests of the nozzle heat transfer character provides proof for rational disposal nozzles and optimizing secondary water cooling system.

通过对喷嘴传热性能的测试，得到了水／气－水喷嘴在不同喷水压力下的传热系数；实验得到的双喷嘴平均传热系数与生产过程数据计算的传热系数的误差在5%~9%以内，研究结果表明喷嘴传热性能的热态实验可以为合理布置喷嘴、优化二冷制度提供依据。

Based on the gas heat transfer theory, a kind of gas heat transfer strengthener is developed to solve the low efficiency of the boiler heat transfer on the gas side.

针对目前锅炉内烟气侧换热效率低的问题，基于气体传热原理的分析，开发了一类气侧传热强化器。

The movement can be divided into two regions, one is the active surface region, the other is the solid region, and it goes under the way of rolling and falling. The heat transfer process in rotary kiln goes with extremely complex physical and chemistry process. Considering the revolving of the kiln body itself and the special movement way of the materials, as well as the influence of the material reaction dynamic parameters, we have established the unidimensional axial heat transfer model for rotary kiln. Then according to the tentative data which has been published, we have testified that the unidimensional axial heat transfer model could reflect the

回转窑内的传热过程伴随着十分复杂的物理化学过程，考虑窑体自身的旋转和物料运动的特殊方式，以及物料的反应动力参数等的影响，建立了回转窑内一维轴向传热模型，并根据已发表的试验数据对建立的一维轴向传热模型进行了验证，该模型可以反应出回转窑内各相沿轴向的温度分布趋势，这样结合热工分析，可以对回转窑的生产和运行给出适用的指导，并力图达到增产节能的效果。

Market forecasting: Our company is the first to produce enamel heat-transfer elements gilled heat-transfer elements used for the cold ends of rotary air forewarmer in big electric power plants,and enamel light pipe heat-transfer elements used for the tubing or box-type air forewarmer in small-sized electric power plants,are both made in our company .Our products are used in over 40 electic power plants of our country and exported to Japan、 Viet Nam、 Pakistan etc.

市场预测：我公司是国内第一家搪瓷传热元件生产厂家，大型电厂的回转式空气预热器冷端所用的片式传热元件和小型电厂管箱式空气预热器所用的搪瓷光管传热元件均为我公司生产，已在全国40多家电厂采用，并出口到日本、越南、伊朗、巴基斯坦等国家。

The experimental results are as follows:(1) Without EAF the fouling resistance increase along with addition of time and change of the heat transfer coefficient is just contrary to the result. However, with EAF fouling resistance still enhances at the beginning of experiment and later, it gradually minishes after experiment has started for some time. Of course, the change of heat transfer coefficient still is contrary to the outcome. But when experiment lasts longer time, fouling resistance and heat transfer coefficient change in the same trend as the fore results at the beginning of the experiment. However, They all go to the tranquilization until the last.

实验结果表明：(1)没有经过电磁处理时，污垢热阻随着时间的增加而增加，换热系数随着时间的增加而减小；一旦经过电磁场的处理，污垢热阻开始时仍呈上升趋势，经过一段时间以后，便逐渐下降，换热系数的变化与此正好相反，即在实验开始时呈下降趋势，后来逐渐上升；当实验时间延长时，发现污垢热阻及换热系数在实验开始时的变化趋势与前面的实验结果基本相同，但到后来，二者的数值则分别均趋于稳定。

The major works are as follows: 1 The 3-D numerical model of U-sharp flow passages is set up. The single-phase fluid flow and heat transfer are simulated for the U-sharp smooth and rib-roughened flow passages with FLUENT software. Their performance curves, temperature field and velocity vector are obtained and the local heat transfer and flow pressure-drop distribution along flow passage are analyzed. It is revealed that the ribbed flow passages can enhance heat-transfer and make the temperature more uniform, but it increases the pressure-drop to more extent. 2 The influences of diaphragm depth, channel width and board spacing on the performance are investigated.

建立了层叠式蒸发器U形流道的3维湍流模型，用FLUENT软件对尺寸相同的U形光滑流道和肋化流道中单相流体的传热和流动进行了数值模拟，得到了两种流道的传热和阻力性能关系曲线及速度矢量图、温度场，分析了光滑流道和肋化流道的局部换热系数及沿程压降变化，结果表明流道的肋化能有效的增强传热，而且使流体的流动和传热更加均匀，但也较大地增大了阻力。

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In the area of high technology of China, the developing technology of cryogenic thermodynamic process and heat transfer has resulted in the Shenzhou-V man-carrying space ship, Fengyun-III meteorological satellite and magnetic suspension train. Manufacturing of fuel (liquid hydrogen and liquid oxygen) of a cryogenic rocket, the cryocooler used to cool down infrared sensors, cryogenic-condensation vacuum pump used in manufacturing of semiconductors, super-conduct quantum interferometer and liquefied natural gas technology are all outcomes of the studies on cryogenic thermodynamic process and heat transfer. In these areas, there are many unexploited sub-areas. Therefore, cryogenic thermodynamic process and heat transfer is a developing study area, and is await more jobs by the younger generation.

在高科技领域，我国空间探索用&神州五号&载人飞船的成功发射、&风云三号&气象卫星的可靠运转以及磁悬浮列车技术等都与低温热力过程与传热技术的研究进展密切相关的，低温火箭发动机液氢液氧燃料的生产、红外传感器冷却的低温制冷机、半导体制造业用的低温冷凝真空泵、超导量子干涉仪与液化天然气的储运等技术都是低温热力过程与传热技术研究发展的产物，且有很多新技术有待于开发，是一个与时俱进、不断开拓的领域，有待于有志者去开发。

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