吸热

The results show that the decalescence of catalyst bed affects the process of hydrogen peroxide catalytic decomposition greatly. If the catalyst bed is preheated or made up of materials with low thermal conductivity, that influence can be depressed. At the same time, the response characteristic of catalyst bed and the efficiency of catalytic decomposition can be improved. The low frequency pressure instability of catalyst bed occurs because of the coupling of catalytic decomposition and supplying. The decomposition plane pushes all the way through the catalyst bed during pressure oscillations, causing unreacted liquid hydrogen peroxide to be exhausted from the bed and leading to the appearance of liquid hydrogen peroxide channeling. Consequently, how to prevent or at least limit this channeling is the key to eliminate the pressure instability of catalyst bed. It was found that adding clapboard to the catalyst bed can depress the pressure instability efficiently.

结果表明催化剂床及催化剂的吸热对过氧化氢分解过程影响很大，对催化剂床进行预热或采用热导率低的材料制造催化剂床等措施，可以降低催化剂床壁面吸热对催化分解过程的影响，提高催化剂床的响应特性和催化分解效率；催化剂床的低频不稳定是催化分解过程与供应系统耦合产生的，催化剂床气体界面的波动过程中，液体过氧化氢穿透催化剂床形成过氧化氢液体通道，过氧化氢液体通道的产生和扩大是催化剂床不稳定的主要原因，也是消除催化剂床不稳定的关键，试验中在催化剂床内加入分流板成功地抑制了催化剂床的低频不稳定。

According to the composition of elements of fuel,thermochemical forms,combustion heat,and time-dependent relations of oxygen concentration acquired during fullscale tunnel fire experiment,the formulae are given for calculating di- mensionless burning rate, released heat rate ,and ratio of medium decalescence.

根据燃料的元素构成、热化学反应式、反应物和生成物的焓变以及燃烧过程中监测到的烟气中氧气浓度随时间变化规律，提出了计算某一时刻燃料燃烧速率、释热速率和介质吸热率的关系式；通过实际规模的火灾试验，对其数据的计算表明，对木质类巷道火灾，最大比燃烧速率为0.193，最大释热速率约为1～3.5 MW，介质的吸热率为22

It builds the whole liquid-cooling system mainly by the design of the liquid-cooling decalescence boxes(improve its bottom material from aluminium alloy to pure copper, enlarge its volume, better cooling effects, and strengthen pressurization), by the operations of cooling effect about the heat exchanger worked by its temperature adjustability of the ribs(diffuse the heat fleetly owing to the excellent diathermancy of the material of the ribs ,make effective diathermancy owing to ribs outside areas, and drive the heat of the ribs away by the fans), and by the water pump made up of the piezoelectric ceramic with the excellent performance-no electromagnetism interference, little cubage, little noise, light exterior, light weight, low consume, high flux, replacing the mechanical pump.

在液冷散热器的研究中，主要通过对液冷吸热盒设计不断地改进(使吸热盒底部的材料从铝合金变为纯铜材料，其整个体积有所变大，但其散热效果明显变好，且密封性得到了极大地加强)，综合地运用换热器中肋片的壁面温度调节作用产生的散热效果(肋片材料优良的导热性，快速地扩散了热量：肋片较大的与流体接触的表面积，使传热更加充分，对流热阻大大减小；再利用风扇对肋片上的热量进行吹散)，利用性能优良的压电陶瓷泵(该泵机电性能稳定，具有无电磁干扰、体积小、噪音小、外型轻薄、重量轻、低能耗。、高扬程等优点。)代替机械泵作为驱动源，搭建了整个散热系统。

The two samples crystallized and annealed between 200 and 315℃ from the rubbery state or from the melt state exhi-bited a small endotherm peak at approximate 10 to 20℃ above the crystalliza-tion and annealing temterature and a large endotherm peak at 335 to 345℃.

在200—315℃结晶并退火热处理后，试样的DSC曲线上出现了两个吸热峰。低温吸热峰较小，并与结晶和退火温度Tc与在不同Tc下生成的不完整晶体的熔融和重结晶过程有关，而Tm的出现则与完整晶体的熔融过程有关。

Based on different mist evaporation processes,mist movements in smoke and flame with none aerification,partial aerification and total aerification were studied,leading to mist endotherm rate,prediction model for critical mist flow rate and the criterion between defferent aerification processes.

根据雾滴吸热蒸发状态的不同，分别分析了烟气层和火焰区内无汽化、部分汽化和完全汽化时的雾滴运动情况，得出了细水雾吸热速率，建立了临界雾流率预测模型，并给出了不同汽化状态之间的临界判据。

It is found that there exist two endothermic peak at 574 ℃ and 790 ℃differently in the DSC curve of the quartz sand during heating.

结果发现，石英砂加热过程中，分别在574℃和790℃附近出现了两个吸热峰，高纯度石英砂焙烧后进行加热时只在569℃出现一个吸热峰。

The project will see 100 heliostats installed on 208 mu of land to be used to gather sunlight and reflect and concentrate it onto the solar power tower's heat absorber, heating water to create steam to generate electricity.

该项目在208亩地上将建成100面定日镜，用它收集的太阳光，反射聚集到太阳能吸热塔的吸热器里，将热能通过加热水，产生蒸汽，作为动力发电。

The mixed air was found to be favorable to carbothermic reduction of ilmenite and formation of Ti compounds.

中温吸热峰主要对应于Ti〓O〓氧化物的形成；高温吸热峰主要对应于Ti化合物的形成。

The results showed that the temperature at the air outlet and theheat collecting efficiency of the solar air heater with a perforated absorber flat plate were apparently higher than those of the solar air heater with a nonporous corrugatedabsorber plate.

结果表明，使用穿孔吸热板的平板太阳能空气集热器的出风口温度和集热效率均明显高于使用无孔波纹吸热板的太阳能空气集热器。

Based on modification of the wolfhard-parker burner, and the experimental study on fire suppression with water mist under the consideration of its suppression mechanism respectively,the relative contributions to fire suppression of oxygen dilution,specific heat and latent heat were investigated.

通过改进wolfhard-parker燃烧器，和对细水雾灭火时不同机理作用的分离实验研究，探讨了在灭火时水雾的蒸发潜热吸热作用、热容吸热作用以及稀释氧气作用在抑制气体扩散火焰方面的相对贡献。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。