PM-200R在全水发泡聚氨酯管道保温中的应用

依据亨斯迈聚氨酯公司的Daltofoam ME 44204/Superasec 5005泡沫制品的性能，在PM－200的基础上开发了一种与Superasec 5005性能相近的新产品PM－200R，该产品可应用于全水发泡聚氨酯管道保温材料中，扩大了我公司聚合MDI产品的应用领域。     

国内外泡沫玻璃产业发展沿革及趋势

系统介绍了泡沫玻璃保温绝热材料的优良特性和国内外泡沫玻璃产业发展沿革,根据所掌握的技术资料,总结归纳了国内外泡沫玻璃技术发展历程,可以为我国泡沫玻璃的生产和研究工作提供有益的借鉴作用.     

低粘度硬质聚氨酯泡沫聚醚多元醇的研制

针对北方地区冬季防腐保温施工不方便的缺憾 ,研制开发出了一种低粘度的聚氨酯用聚醚多元醇 ,使改进后的聚氨酯制品体系粘度明显降低 ,流动性得以改善 ,提高了硬质泡沫制品强度和尺寸稳定性 ,既满足了原有指标的要求 ,又给施工带来了方便 ,在 -1 5℃以下环境施工过程中 ,解决了酥皮、脆裂等问题 ,确保冬季能生产出合格的聚氨酯制品     

硅二极管内层聚酰亚胺保护胶的研制

由聚硅氧烷二胺、芳香族二胺、芳香族二酐溶液缩聚合成的含硅聚酰亚胺应用于硅二极管内层绝缘保护,显示出良好的应用前景。     

带包覆层铁磁性管道腐蚀脉冲涡流检测技术

应用脉冲涡流检测技术,对带包覆层的铁磁性管道腐蚀进行了检测。对不同厚度的包覆层、不同面积和深度的腐蚀缺陷进行了试验,分析检测灵敏度的变化。试验结果表明,对于较大面积的腐蚀缺陷,即使包覆层较厚,在合适的检测参数下,脉冲涡流也具有很好的检测能力。     

Preparation of porous diatomite ceramics by an alkali treatment near room temperature

Porous diatomite ceramics were prepared by alkali treatment of the raw powder without any sintering procedure. The alkali treatment was carried out by dissolution of the surface by KOH solution to form solid crosslinking among the powder particles near room temperature. The effect of the amount and concentration of KOH solution on the properties of the porous diatomite ceramics was investigated. Variation of the treatment factors was found to be effective for controlling properties such as porosity, strength and thermal conductivity. Mixing a larger amount of high-concentration KOH solution with the raw powder could promote dissolution and the formation of thicker necks between particles by solid crosslinking. The resultant porous diatomite ceramics showed comparable compressive strength and thermal conductivity to those of sintered materials. The proposed method is therefore a useful tool for the preparation of high-performance porous ceramics near room temperature.     

用于电容器的新型绝缘填充料的研制

论述了对苯型不饱和聚酯树脂与环氧树脂的性能对比、绝缘填充料的配制方法及使用方法,介绍了用新型绝缘填充料制作的电容器的性能测试以及各种填充料的性能比较,对新型绝缘填充料加工工艺的优越性及广阔的应用前景进行了展望。     

Parametric equations for energy and load estimations for buildings in India

Detailed simulations have been performed for a single zone building to calculate the maximum heating and cooling loads as well as specific annual energy consumption for a single zone building. Numerical results have been used to derive parametric equations as a function of the thickness of insulation as well as the surface to volume ratio (A/V) taking into account the effect of increasing height as well as increasing length and width. For un-insulated building, the energy consumption increases steeply with increasing height, whereas for an insulated building, the energy consumption decreases slightly. For increasing lengths and widths, the change in energy consumption is a mild positive slope. The optimum thickness of the insulation obtained in the paper corresponds to the recommended U-values of roof and the walls in the building code of India, U being the total heat transfer coefficient.     

纳米无机粉末填充电磁线漆的介电特性研究

首先介绍了PWM变频电机绕组绝缘过早损坏的原因，对比试验研究了纳米无机粉末填充的电磁线漆在不同温度和频率下的介电、物理等特性，以及新型电磁线在高频方波电压下的破坏过程及寿命，分析了纳米级无机填料对电磁线漆性能的影响。研究表明，无机超微粉的填充使电磁线漆膜的体积电阻率、介电常数和介质损耗角正切有明显的增加，同时可使漆膜的热特性和耐电晕性有显著的改善，30％～40％重量的填料可使原有漆膜的热分解温度提高约45℃，电磁线加速电晕老化寿命也是传统电磁线的4～9倍。     

Thermal-fluid assessment of the design options for reactor vessel cooling in a prismatic core VHTR

The design of the reactor pressure vessel is an important issue in the VHTR design due to its high operating temperature. The extensive experience base in Light Water Reactor makes SA508/533 steel emerge as a strong candidate for the VHTR reactor vessel but requires maintaining the vessel temperature below the ASME code limit. To meet the temperature requirement, three types of vessel cooling options for a prismatic core VHTR are considered: an internal vessel cooling, an external vessel cooling, and an internal insulation. The performances of the vessel cooling options are evaluated by using a system thermo-fluid analysis code and a commercial computational fluid dynamics code during normal operation and accidents. The results suggested that the internal vessel cooling with the modified inlet flow path will be a promising option. The external cooling option does not ensure an effective cooling of the RPV. The insulation option provides an effective reduction of the RPV temperature in the normal and accident conditions but reduces the fuel safety margin during the accidents, requiring careful consideration before the implementation.