i线(365nm)分步投影光刻机曝光系统

主要介绍了一种结构新颖的光学曝光系统 ,对光路的结构、原理、特点以及关键技术作了详细的论述 ,并给出了光路系统图和照明均匀性的测试结果     

低温环境下的冷凝压力调整

采用风冷冷凝器的大型制冷系统在冬季运行时，由于冷凝器所处的环境温度较低，会导致冷凝压力过低，从而影响到正常供液和系统的正常工作。这可以通过减小传热温差、减小有效冷凝面积、减小冷凝风量以及热气旁通的方法进行改善和解决。     

有氧环境的氧化还原/乙烯基自缩合法制备超支化聚丙烯酰胺

采用了有氧条件下的乙烯基自缩合(SCVP)法制备了超支化的聚丙烯酰胺,并对SCVP反应机理及聚合物结构进行了讨论。结果表明:在有氧条件下合成超支化聚丙烯酰胺时,增加引发剂的用量能够提高聚丙烯酰胺的支化度;延长反应时间能够提高聚合物的分子量,提高支化度;增加单体用量,升高温度能够促使转化率及分子量提高,但会降低支化度;当氧化剂用量较大时,聚合物体现出超支化结构特征。     

利用溴化锂热泵回收冷凝热量的节煤节水分析

传统意义上的抽汽凝汽式热电联产电厂,仍然会有很大一部分冷凝蒸汽的热量通过循环水冷却散发到空气中,形成很大的热损失.利用溴化锂热泵技术回收利用抽汽凝汽式热电联产发电厂冷却乏汽循环水中所蕴含的低温热量给居民小区供热,可进一步提高火力发电厂的热效率,达到节能减排的目的.本文对这个过程的节煤节水情况进行了分析.     

当前空调设计中的一些思考

介绍从空调设计中引发的一些思考，包括对干工况风机盘管产品的迫切需求，冷水机组冷凝热量利用的几种可能方式，补风通风柜的节能实践，以及对医院空调的特殊性与复杂性的体会。     

The glazing temperature measurement in solar stills – Errors and implications on performance evaluation

Although the brine temperature measurement in solar stills would be more or less conventional, the precise condensing surface temperature measurement, appears to present a significant difficulty to measure. In the present investigation, an analysis is developed aiming to underline the parameters affecting the glazing surface temperature measurement and a series of field measurements are presented, aiming to identify and evaluate the errors associated to the measurement of this crucial physical quantity. It is derived that among other reasons the surface temperature measurement accuracy may strongly be degraded owing to the sensor tip overheating due to the radiation absorption, as well as to the development of poor bond conductance between sensor bead and glazing surface. It may also be degraded owing to the temperature drop across the glazing thickness and the non-uniform temperature distribution over the entire condensing surface area, something that makes the selection of the appropriate location of the particular temperature transducer necessary. Based on the derived measurements, an order of magnitude analysis is employed for the approximate evaluation of error range in the condensing surface temperature measurement. This, which depending on specific conditions was found to vary between about 1 and 2 °C, was employed to demonstrate the implications and approximate conditions under which its effect could become excessively high in ordinary solar still investigations.     

多功能热泵冷热水机组研究及在医院设计中的应用探索

由于医院需要具有24 h热水供应能力,如何在满足使用需求的情况下节能减排,通过项目实际设计过程,提出了热泵冷凝热回收加热生活热水的解决方案,介绍了多功能热泵冷热水机组空调系统方案设计思路与国外运行案例数据的分析。     

全自动制冷压缩冷凝机组测试试验台的研究

本文介绍了一种能测试较大范围制冷量的全自动制冷压缩冷凝机组性能测试试验台的工作原理,分析了提高系统的测试精度方面所用的方法。建成的试验台测试工况稳定,测试范围大,测量精度高,测试速度快。     

不同集聚纺筒纱毛羽变化分析

分析网格圈式集聚纱和中空罗拉式集聚纱络筒后的毛羽变化情况.测试了两种集聚纱络筒前后毛羽的外观结构和毛羽增长率,并从其成纱原理上进行了分析.试验表明:纱线线密度为9.7 tex时,中空罗拉式集聚纱的毛羽增长较少;纱线线密度为14.6 tex时,两种集聚纱的毛羽增长率相差不大;纱线线密度为30 tex时,中空罗拉式集聚纱的毛羽增长明显大于网格圈式集聚纱.认为:两种集聚纺筒纱毛羽的变化与两种集聚纺集聚形态密切相关.