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heat exchange     
相关语句
  换热
     Studies on heat exchange of high power CO_2 laser
     高功率CO_2激光器换热性能的研究
短句来源
     There is a criteria relation of heat exchange coefficient for the emission surfacearea (Nu = 0.2Ra~(0.29) where Ra = (1.9 - 2.8) 10~3) at the oputimum height.
     在最佳外形总高度下,散热表面的换热系数有准则关系式Nu=0.2Ra~(0.29),其中Ra=(1.9—28)10~3。
短句来源
     Under the prerequisite of not modifying the basic structure of the original polymerization system, the productive capacity could be increased by 20% by equipping an additional external cooler having heat exchange area of 80 m2 and thermal load of 3.51×106 kJ/h.
     在不改变原聚合系统基本结构的基础上,通过增设一换热面积约80m2热负荷约3.51×106kJ/h的外冷却器即可提高生产能力约20%。
短句来源
     The width,thickness,and unwound length of the exchanger respectively was 0.82m,2mm,and 2.14m,the total number of the plates was 35,the efficient heat exchange area of a single plate was 1.3m~2,the distance between two plates was 8mm,the design pressure was 0.6MPa,the design temperature was 150 ℃.
     该设备板片尺寸为宽0.82m、厚2mm、展开长2.14m,板片总数35块,单片有效换热面积1.3m2,板间距8mm; 换热器设计压力0.6MPa,设计温度150℃。
短句来源
     With the increase of spacing between rows from 10 mm to 200 mm, when the cooling air speed is between 1.8~ 7.5 m/s, the heat exchange capability of the package rises by 5.1%~8.3% and the pressure drop reduces by 11.2%~20.5%.
     风洞试验研究发现,在冷却空气风速1.8~7.5m/s范围内,随着冷却组排间间距从10mm增大到200mm,冷却组换热能力提高5.1%~8.3%,压降降低11.2%~20.5%;
短句来源
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  热交换
     Melt growth of Nd:Y_3Al_5O_(12)(Nd:YAG)using the heat exchange method(HEM)
     用热交换法由熔体生长Nd:Y_3Al_5O_(12)(Nd:YAG)
短句来源
     The improvement of HPL-2000 laser's heat exchange system
     HPL-2000型激光器热交换系统的改进
短句来源
     Development of Intelligentized Heat Exchange Unit Control System Based on PC/104 Bus
     基于PC/104嵌入式模块的热交换机组控制系统
短句来源
     Since the rasistance R(G)>R(Me),temperature T(G)>T(Me) and the heat exchange with outside,et al.
     因电阻T_(G)>R_(Me)、温度T_(G)>T_(Me)以及与外界热交换等原因,使合成腔内产生压力、温度梯度,成为金刚石生长之驱动力。
短句来源
     On-site repair of heat exchange tubes with Nd∶YAG laser
     Nd∶YAG激光用于热交换管的现场修复
短句来源
更多       
  
     Studies on heat exchange of high power CO_2 laser
     高功率CO_2激光器热性能的研究
短句来源
     There is a criteria relation of heat exchange coefficient for the emission surfacearea (Nu = 0.2Ra~(0.29) where Ra = (1.9 - 2.8) 10~3) at the oputimum height.
     在最佳外形总高度下,散热表面的热系数有准则关系式Nu=0.2Ra~(0.29),其中Ra=(1.9—28)10~3。
短句来源
     Under the prerequisite of not modifying the basic structure of the original polymerization system, the productive capacity could be increased by 20% by equipping an additional external cooler having heat exchange area of 80 m2 and thermal load of 3.51×106 kJ/h.
     在不改变原聚合系统基本结构的基础上,通过增设一热面积约80m2热负荷约3.51×106kJ/h的外冷却器即可提高生产能力约20%。
短句来源
     The width,thickness,and unwound length of the exchanger respectively was 0.82m,2mm,and 2.14m,the total number of the plates was 35,the efficient heat exchange area of a single plate was 1.3m~2,the distance between two plates was 8mm,the design pressure was 0.6MPa,the design temperature was 150 ℃.
     该设备板片尺寸为宽0.82m、厚2mm、展开长2.14m,板片总数35块,单片有效热面积1.3m2,板间距8mm; 热器设计压力0.6MPa,设计温度150℃。
短句来源
     With the increase of spacing between rows from 10 mm to 200 mm, when the cooling air speed is between 1.8~ 7.5 m/s, the heat exchange capability of the package rises by 5.1%~8.3% and the pressure drop reduces by 11.2%~20.5%.
     风洞试验研究发现,在冷却空气风速1.8~7.5m/s范围内,随着冷却组排间间距从10mm增大到200mm,冷却组热能力提高5.1%~8.3%,压降降低11.2%~20.5%;
短句来源
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  热量交换
     Research on Air-Sea Heat Exchange During the El Nio Event of 1986-1987
     1986~1987年E1 Nio期间海—气热量交换研究
短句来源
     The traditional temperature-controlling technology affects the shape quality by controlling temperature of rolls,and the roll temperature model is used to calculate heat exchange between rolls and coolant.
     传统的温度控制是控制轧辊温度以实现对板形质量的控制,此轧辊温度模型是计算轧辊与冷却液间的热量交换
短句来源
     Heat flow analysis shows that the heat exchange mainly concentrates near the gradient zone during the middle stage of the growth
     同时 ,通过对生长系统中的热流分析 ,表明在生长过程的中间阶段 ,热量交换主要集中在梯度区附近 ,而坩埚两端与外部环境的热量交换较少
短句来源
     RESEARCH ON AIR SEA HEAT EXCHANGE DURING THE EL NIO EVENT OF 1986-1987 IN WESTERN TROPICAL PACIFIC OCEAN AND THE SOUTH CHINA SEA
     1986~1987年El Nio期间热带西太平洋及南海海气热量交换研究
短句来源
     Heat exchange model uses the measured variables as meteorological parameters.
     热量交换模型以实测气象参数作为变量。
短句来源
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  heat exchange
This may suggest heat exchange between the crust and mantle.
      
A capillary tube was added between the two evaporators in the fresh and frozen food storage chests to raise the evaporation temperature of the refrigerating chamber, and reduce the heat exchange temperature difference and the available energy loss.
      
The water molecules inside this narrow compartment can take part in heat exchange with the external medium during different steps of the enzymatic process.
      
In the study we investigate the length of the inlet thermal segment, the heat exchange at the channel wall as a function of the wall temperature, and we also analyze the applicability of the suggested method of calculation.
      
The energy dissipation due to radiative heat exchange between the gas particles is taken into account.
      
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In this paper, three topics are discussed.1. The thermal effect of the ocean on the atmosphere: Basing upon the distribution of surface sea temperature and the heat exchange between the saa and the atmosphere over the Kuroshio region in NW-pacific, the height of the transitional layer of the atmosphere acted by the ocean and the relation between the gradients of surface sea temperature and that of 1000-500mb thickness are investigated.2. The influence of the atmospheric circulation to the oceanographic...

In this paper, three topics are discussed.1. The thermal effect of the ocean on the atmosphere: Basing upon the distribution of surface sea temperature and the heat exchange between the saa and the atmosphere over the Kuroshio region in NW-pacific, the height of the transitional layer of the atmosphere acted by the ocean and the relation between the gradients of surface sea temperature and that of 1000-500mb thickness are investigated.2. The influence of the atmospheric circulation to the oceanographic circulation: The seasonal variations of the Kuroshio axis approximately are coincided with both that of the jet on 500mb and the major axis of subtropical high over the North pacific ocean. but, between the intensities of the Kuroshio and that of the atmosphric circulation, there are no definite relation to be found.3. The relation between the oceanographic circulation and the weather system over the North-West pacific ocean: In the region between the Kuroshio and the Oyashio, where the maximum surface sea tempera- ture gradient occurred there the frontal zone and the maximum fre-qucency of cyclone and sea fog are just produced, It seems that the activity of the weather systems are quite corresponded with the variation of certain oceanographic circulations.

本文从三方面探讨海洋环流与大气环流之间的对应关系。 1.海洋对于大气的热效应:通过北太平洋西部黑潮区水温分布及海洋与大气的热交换量,说明海洋可以影响到的大气高度;通过水温梯度分布找出其与1000—500mb厚度梯度分布的对应关系。 2.大气环流对于海洋环流的影响:根据黑潮轴线的季节变化,找出其与500mb西风急流和付热带高压轴线的活动是一致的协调的。黑潮强度与大气环流的对应关系并不明显。 3.西北太平洋海洋环流与天气系统:黑潮和亲潮邻接海区水温梯度最大,因而其上正是大气锋区所在,气旋最大频率区和海霧最大频率区均与海洋环流的活动息息相关。 从海洋环流与大气环流的对应关系中,指出海洋影响大气在温湿效应上,大气影响海洋在运动方面。但大气温湿属性改变了,必然引起空气运动。而海水运动产生了,也要引起温盐度的再分布。因而总的说来,海洋影响大气的直接作用为温湿效应,间接作用为空气运动。大气影响海洋的直接作用为海水运动,间接作用为温盐效应。

During the period of August-November, 1960, observations were made to investigate the characteristics of radiation balance, heat balance, and microclimate in the forest of Hainan, Kwangtung. The results of the observations may be summarized as follows: 1) In the forest the radiation intensity and the heat exchange are much weaker than on the open ground. 2) The radiation heat is mainly spent on the soil heating and evaporation in the forest, but mainly on the air heating and evaporation...

During the period of August-November, 1960, observations were made to investigate the characteristics of radiation balance, heat balance, and microclimate in the forest of Hainan, Kwangtung. The results of the observations may be summarized as follows: 1) In the forest the radiation intensity and the heat exchange are much weaker than on the open ground. 2) The radiation heat is mainly spent on the soil heating and evaporation in the forest, but mainly on the air heating and evaporation on the open ground. 3) In the forest the soil and air temperatures are lower, but the humidity is higher than on the open ground. Therefore, the microclimate in the forest is cool and moist, while that on the open ground is hot and dry.

本文根据1960年8—11月在热带地区海南岛树林内外的辐射平衡、热量平衡与小气候的观测,对林内外的辐射能与热能收支作了计算,分析了林内外小气候要素的分布与变化规律,得到下列初步结果:林内的辐射强度与热量交换比林外弱得多;林内得到的淨辐射主要用于土壤增热与蒸发,林外得到的淨辐射则主要用于空气增热与蒸发;林内的土壤温度与空气温度比林外低,而空气湿度则比林外高。林内的小气候是凉爽而潮湿的,林外的小气候则是炎热而干燥的。森林对改善小气候环境条件有重大的良好作用。

The characteristics of flow in cooling reservoirs, due to the presence of thermal stratification and the heat exchange on the surface, is far more complicated than that of flow usually encountered in hydraulic engineering. The criteria for similarity of flow in models and prototypes are so numerous that the satisfication of all of them is not practical. The author presented, in 1959, the criteria for similarity with due consideration of the fact that on one hand, they should be sufficient for the reproduction...

The characteristics of flow in cooling reservoirs, due to the presence of thermal stratification and the heat exchange on the surface, is far more complicated than that of flow usually encountered in hydraulic engineering. The criteria for similarity of flow in models and prototypes are so numerous that the satisfication of all of them is not practical. The author presented, in 1959, the criteria for similarity with due consideration of the fact that on one hand, they should be sufficient for the reproduction of main hydraulic and thermal characteristics in models; and on the other hand, it should be practical to satisfy the criteria in ordinary hydraulic laboratories. The similarity laws thus obtained are presented in equation (17). When the room temperature and moisture content can be controlled and adjusted the similarity laws as shown in eq. (13) are recommended. A series of verification tests and field observations were carried out in the following years, the latter being made in two cooling reservoirs. In one of the reservoirs, which has an average water depth of 4.5m and a surface area of 5 km~2, general flow pattern of the surface layer and of the bottom layer of the thermal density current was observed. They were well verified in a model with length scale L_r=250 and depth scale Z_r=40. The other cooling reservoir is a much smaller one, with surface area of only 9000 m~2 and an average water depth of 2.5m. Besides flow characteristics, the variation of the temperature field of the reservoir and of the total heat balance with respect to time were carefully measured. A model with L_r=15 and Z_r=6 served to verify the hydraulic and thermodynamic data obtained in the field. The paper is a collective report, including the derivation of the similarity law and its verifications, and a discussion of the scale effects.

冷却池中的水流运动,由于存在着水流本身的溫差作用及池面的散热受热作用,其运动規律,要較一般水流运动規律复杂得多;其模型相似条件,亦极难全面滿足,本文从整个水池的基本相似要求出发,着重考虑了水面溫度場相似的要求,提出了模型律;对存在着的比尺矛盾作了一些探討,并在室內和現場作了一些試驗驗証。几年来的試驗实践說明,虽然目前的模型相似問題,还有不少环节沒有解决,直接用热水作为試驗介貭的模型試驗,不失为規划冷却池工程布置和估計水面散热能力的一种有效工具。

 
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