查询词典 heat exchanger

An applicable air heat exchanger and coal gas heat exchanger are developed according to the technological characteristic of gas burning lime kiln.

前 言济南钢铁集团总公司的4座气烧石灰窑主要燃料是高炉煤气。

The design and research of the paper has certain reference value to shell-and-tube heat exchanger especially U-tube heat exchanger engineering design.

本文的设计与研究对于管壳式换热器尤其是U形管式换热器的工程设计具有一定的参考价值。

After diagnosing the energy-used of the heat exchanger networks of optimization, hot-cold curves and grand curves were obtained. The results indicates that pinch temperature is improved, utility quantity is much reduced, and final temperature of the preheated crude oil is increased, which proves the optimal heat exchanger networks are the most optimal ones tosome extent.

对优化后的换热网络进行用能分析，做出了过程的组合曲线和总组合曲线，结果发现夹点温度有所提高，冷热公用工程用量降低了很多，原油预热终温提高了，证明优化后的换热网络在一定程度上达到了最优。

This invention provides a kind of superthin tube heat exchanger. Its feature is that the heat exchanger comprises hollow level header that the refrigerant can flow through, several refrigerant tubes insert in the level header, so it can distribute the refrigerant that flow in the level header.

本发明提供一种超细管道热交换器，其特征在于：上述热交换器由以下部件构成：中空的水平集管，可以使制冷剂流过；若干个垂直制冷剂管群，插在上述水平集管内，可以使在上述水平集管内流动的制冷剂得到分配；隔断，设置在上述水平集管内部的上述垂直制冷剂管之间，能够改变制冷剂的流动方向。

The main products: large acid-base tank, stainless steel fermentation tank, concentrated liquor cans, seeds, cans, nitrogen tank, condensate, water, automatic air pressure to water tanks, Jinqi cans, vacuum furnace, distillation columns, vacuum tower, the reactor , Condenser, deaerator, air filters, buffers, water collection and bellows heat exchanger, U-tube heat exchanger, such as titanium tetrachloride heater.

主要产品：大型酸碱贮罐、不锈钢发酵罐、母液浓缩罐、种子罐、氮气贮罐、凝水罐、自动气压给水罐、浸漆罐、真空炉、精馏塔、减压塔、反应器、冷凝器、除氧器、空气过滤器、缓冲器、集水器及波纹管换热器、U型管换热器、四氯化钛加热器等。

The efficiency of shell and tube heat exchanger is a core to design of a shell and tube heat exchanger .

管壳式换热器是广泛应用于各个领域的工业设备，在国民经济中具有非常重要的作用，管壳式换热器的效率问题是设计工作的核心。

The following points are emphasized:The operation models of adiabatic and diabatic distillation have been set up and the operation block, thermodynamics model and mathematical model in the simulation have been determined as well;(2)Based on the simulation and exergy analysis with Aspen Plus program, shortcut distillation design—DSTWU model and rigorous distillation design—RADFRAC model, the author has determined the heat duty, exergy losses and the distribution of exergy losses along the adiabatic column, which will help the simulation and optimization of the diabatic distillation;(3)Diabatic distillation under various operation conditions has been simulated by using energy balance method and exergy analysis;(4)How the different mixture and the various degree of separation, number of trays and feed location influence exergy saving in diabatic distillation have also been discussed;(5)On the basis of the total exergy losses along the column, different schema of the heat transfer distribution along the column have been compared and analyzed;they can be classified in three categories: heat duty equipartition approach, empirical approach, separation degree matching approach. In conclusion, different heat transfer distribution along the column will have effect on total exergy losses. In particular, most satisfactory results have been obtained by using separation degree matching approach. In order to diminish the exergy losses, heat transfer distribution should meet the needs of the request of separation degree.And on this premise, the author makes his suggestion in increasing the proportion of heat supplied to the tray with minimum exergy losses and decreasing the proportion of heat supplied to the tray with the maximum exergy losses.

本文对透热精馏过程进行了模拟并对其节能效果的影响因素做了较为全面的分析和深入的研究，主要研究内容如下：(1)建立了常规精馏和透热精馏过程的模拟操作模块、热力学模型以及数学模型；(2)利用化工模拟软件Aspen Plus并分别采用DSTWU简捷模型和RADFRAC严格计算模型对常规精馏进行模拟计算和有效能分析，确定常规精馏塔的公用工程热负荷、有效能损失及有效能损失在塔内的分布，为透热精馏的模拟和优化提供数据参考；(3)对不同物系在不同分离度条件下进行透热精馏的模拟，分别采用能量衡算法和有效能分析法进行计算和分析；(4)探讨了各种因素如物系的选择、不同分离度、塔板数、进料位置对透热精馏节能效果的影响；(5)以全塔总有效能损失为比较基准，对热量在塔内的三种分布方案即热负荷平均分配法、经验法和分离度匹配法进行了对比分析并得出结论：塔内热量的不同分布方案对于全塔总有效能损失会产生影响，其中以分离度匹配法的节能效果最为理想，为减少有效能的损失，应使塔内的热量分布满足各塔板的分离度要求，并在此前提下，尽量减小有效能损失大的塔板的热负荷和增加有效能损失小的塔板的热负荷。

On the basis of the conservation equation of continuous medium and in combination with mechanics of fluid through porous media and the heat transfer theory in porous media, conservation equations in porous media (continuous equation, momentum equation and energy equation ) are derived, When constructing the downhole temperature model, heat transfer in a wellbore is considered as the heat transfer in a vertical tube, the flow in a wellbore considered as sufficiently parallel flow, heat transfer in injection zones considered as heat conduction and convection in porous media, the flow in injection zones considered as flow through porous media, heat transfer in adjacent rocks considered as heat conduction in porous media.

在建立井下温度场模型时，把井筒的传热看作是竖直圆管中传热问题，把井筒的流动看作是充分发展的层流流动；把注入层中的传热看作是多孔介质中导热和对流的传热问题，把注入层中的流动看作是渗流；把围岩中的传热看作是多孔介质中导热问题。

This thesis analyzes the types and art trait of solar-assisted heat pump water heater, the development trend of direct expansion solar-assisted heat pump water heater, makes a summary of these research results from six aspects. On the basis of these works and from the point of view of receiving optimum solar radiation , the thesis develops a novel design model of direct expansion solar-assisted heat pump water heater with a truncated cone collector/evaporator, theoretically analyzes the heat that the system can absorb, compares its ability with other two types of cylinder and flat plate ones, and calculates COP and EER with computer aids. The results show that a truncated cone direct expansion solar-assisted heat pump water heater can absorb not only more solar energy but heat energy in air. It takes on favorable thermal performance. Under the average day in February which is of the worst weather throughout the year in Kunming, the COP is about 4. 2, EER is about 2.9 . The heat absorbed by the system are more than those of the other systems. The system is very great in terms of saving

本文分析研究了太阳能热泵热水系统的分类及技术特点，直膨式太阳能热泵技术国内外发展趋势，从六个方面对直膨式太阳能热泵热水系统的研究进行了归纳总结；在此基础之上，从太阳辐射的最佳接收考虑，提出了集热器／蒸发器为圆台侧面的圆台型直膨式太阳能热泵热水器的设计模型，理论上分析了这种热水系统所接收的太阳辐射和得热量，并与圆柱型、平板型的直膨式太阳能热泵热水系统进行对比分析，通过计算机辅助模拟计算出：系统不但可以有效地吸收太阳能，还能有效地吸收空气中的热量，具有良好的热性能；在昆明，以2月为代表的冬季，其太阳辐照较低，系统的制热系数COP值也能达到4.2，效能比EER值为2.9；系统的得热量高出圆柱型、平板型的直膨式太阳能热泵热水系统，节能效果明显。

The purpose of this article is to review and discuss and current preventive and healable measures of heat illness and abstract scientific programs to prevent and cure heat illness.In order to suit with the PLA"s current fight direction and to improve the army"s capacity and levels of the rear service, to keep soldiers healthy and strong in the heat stress environment, by the way of systemic evaluation, we collect a series of successful work and research experience about the heat illness prevent and treatment. After analyzing and comparing these results, then based on the theories of the preventive medicine, we have try out further adaptable programs to prevent heat illness. It consists of 5 chapters, such as "heat acclimatization, water and electrolyte supplement, regulated work/rest cycle limits, lower temperature equipment, drug preventing heat stress".

为有效降低热环境因素对部队的威胁，提高部队的战斗力和应急保障水平，有针对性地形成热区部队中暑防治保障预案，与目前特定的作战方向相适应，我们根据部队当前状况，立足部队应用，大量收集了有关文献，通过应用系统的评价方法，对耐热锻炼、水盐补充、调整作息制度、防暑降温装置和药物防暑这几项主要防暑措施的实施方法进行了全面分析比较和评价，提出了更进一步的修正意见，提炼出了适合当前部队应用的方法，使其更加适于部队的应用；同时，还对中暑急救与治疗方面的有关文献也进行了概括和总结，并根据中暑的发病特点和救治重点，为部队中暑的救治设计了现场急救装置。

The circulation, consumption and reproduction of the trilogy have not only testified to its historical significance and literariness, but also invested it with new meanings.

该三部曲的流通、消费与再生产不仅验证了其历史意义及文学性，而切还赋予它以新的意义。

If he thought that he could buy me off, he would be wrong.

如果他认为他可以收买我，那他就大错特错了。