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导热

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The simulative results showed that the total heating loads in solar house were 24.4 % less than those in the reference house of no auxiliary heat sources in the whole heating period in Shenyang when indoor air temperature was 18℃ in the houses with ideal auxiliary heat.The effects of operation,structures and performance parameter of the solar thermal storage wall were analyzed.

无内通风口式集热蓄热墙冬季空气间层是密闭的,发挥了重质墙体的蓄热作用和空气间层的热阻作用,依靠导热向室内传递热量;有内通风口式集热蓄热墙依靠空气间层与室内的对流换热和墙体的导热两种方式向室内传递热量。

Aluminum nitrate enneahydrate and barium hydroxide octahydrate are considered as potential phase change materials for energy storage.

用热敏电阻作加热元件和测温元件,首次测定了适合用作相变储能材料的九水合硝酸铝、八水合氢氧化钡导热系数的测定在10℃~80℃温度范围的导热系数,其实验值的不准确度分别为2.8%和3.2%。

The uncertainties of the measured thermal conductivities were estimated to be ?.8% for aluminum nitrate enneahydrate and 3.2% for barium hydroxide octahydrate, respectively.

导热系数是物质的基本物理性质之一,在储能材料研究领域的理论计算、实用储能设备的设计以及相关材料的传热学研究中,都是必不可少的热物理数据,测定导热系数具有很重要的理论和实际意义。

Taking a carborundum brick of which the thermal conduction coefficient was given as specimen, the measuring error of it is less than 8%.

通过测量已知导热系数的碳化硅砖的导热系数,得其误差小于8%;通过对同一试样的两个小试样进行平行测量,得其相对偏差小于3%。

The form of IPN can greatly increase the thermal conductibility. So thermal-conduct composite with lower filling ratio but better properties can be prepared successfully.

互穿网络的形成,能大幅度提高材料的导热性能,从而实现了低填充量、高性能导热复合材料的制备。

At 20℃ the relationship between thermal conductivity and density of corkboard may be predicted with following equation: Where: K-At 20℃, thermal conductivity of corkboardKcal/m.

寻找软木砖导热系数与容重间内在关系的规律性,在没有准确的实测数据时,用极易测定的软木砖容重,来测算和控制其导热系数值,在生产和工程设计中,具有一定的实用价值。

Provide various specifications of the thermal conductivity of silica fabrics / films, films with silica gel hot heat Laminated Materials, CD-ROM Anti-slip silicone pad dedicated, transparent silicone tube, flame-retardant silicone casing, thermal conductivity soft gel tablets, high temperature resistant silicone sealed tube / article, TFT-LCD with buffer shading silicone membrane, eggbeater with silicone tube (core material: stainless steel), PCB hot silicone cushion gaskets, such as a few more than ten kinds of series, million kinds of silicone products specifications.

提供各种规格之导热硅胶布/片、发热片用硅胶热贴合材料、CD-ROM专用硅胶止滑垫、透明硅胶套管、阻燃硅胶套管、导热软质硅胶片、耐高温硅胶密封管/条、TFT-LCD用缓冲硅胶遮光膜、打蛋器用硅胶管、PCB热压硅胶缓冲垫片、等数十余种系列,万余种规格之硅胶产品。

The calculative results show that the efficient thermal conductivity rises as temperature rises under a constant fiber volume fraction, and it is proportional to the third power of absolute temperature; it decreases as fiber volume fraction increases under high temperature; it increases as fiber volume fraction increases under low temperature, and it is in agreement with that is described in the literature.

此式计算结果表明:在纤维体积分率一定时,其有效导热系数随温度的升高而升高,且它是绝对温度的三次方关系;在高温条件下,其有效导热系数随纤维体积分率的升高而四川大学硕土学位论文有减少趋势;在低温条件下,其有效导热系数随纤维体积分率的增大而增大,与所查文献描述规律一致。

The invention discloses an optical-fiber all-optical code converter, comprising a temperature control circuit as well as optical-fiber Mach-Zed interferometer, heat sink, semiconductor refrigerator, thermosensitive resistor and radiator, where the interferometer is composed of two cascaded 3dB couplers on the heat sink, the relation between length difference delta L of two arms of the interferometer and generated delay time difference delta T is that delta L=c.delta T/n, where c is light velocity in vacuum and n is refractive index of optical fiber; the thermosensitive resistor is used to detect temperature of interferometer, the temperature control circuit is used to compare feedback voltage of the thermosenstive resistor with a given voltage to regulate working current of the semiconductor refrigerator, and the semiconductor refrigerator refrigerates or heat two arms of the interferometer by the heat sink.

本发明公开了一种光纤型全光码型转换器,它包括温控电路和位于密封盒内的光纤型马赫-泽德干涉仪、导热热沉、半导体制冷器、热敏电阻以及散热片;干涉仪由位于导热热沉上的二个3dB耦合器级联而成,两臂的长度差ΔL与产生的延时差ΔT之间的关系为ΔL=c。ΔT/n,c为真空中光速,n为光纤折射率;热敏电阻用于对干涉仪的温度进行探测,温控电路用于比较热敏电阻反馈的探测电压和设定电压,对半导体制冷器的工作电流进行调节,半导体制冷器通过导热热沉对干涉仪两臂同时进行制冷或加热。

The main is focused on the discussion on the crystal structure, porosity, temperature profiles, thermal conductivity, salinity and density of sea ice in Liaodong Bay based on the author's research on ice temperature profile in field, thermal conductivity coefficients in field and in laboratory, and the ice structures studied under the computerized tomography scanner.

重点以作者完成的海冰现场温度场、现场冰层导热系数和实验室导热系数以及应用正交偏光和CT扫描研究冰组构等研究成果为主体,讨论了辽东湾海冰的晶体结构、孔隙率、温度场和导热系数、盐度、密度等工程海冰指标。

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关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。