国内现运行低温甲醇洗装置生产问题分析

在清洁能源快速发展的今天,各地先后投产了多套大型甲醇、二甲醚、烯烃装置,并有多套特大型装置处于筹建阶段,这些工程大部分煤气净化工艺路线选择了低温甲醇洗工艺,本文就已投运的煤气净化低温甲醇洗装置的生产运行状况进行了总结分析并提出建议性解决方案。     

淬火冷却技术分析

冷却是淬火工艺中最重要的工序,既要获得良好的组织结构,又要减少淬火缺陷,关键要选择理想的冷却介质,制定合理的冷却方法。从冷却介质、冷却方法上作了探讨,提高了钢的机械性能。     

锅炉给粉机下粉不畅原因分析及对策

对台州发电厂锅炉下粉管堵塞的多种原因进行了详细的分析，有针对性的采取了相应的对策，通过试验了解了煤粉混合器的阻力特性及下粉管内的静压值，对相关系统的投运方式进行了改进，取得了明显效果。     

低温相变纳米流体释冷特性研究

在共晶盐BaCl2水溶液中悬浮粒径为20nm体积分数为1.13％的TiO2颗粒,通过添加分散剂和超声波振荡,制成分散均匀的TiO2-BaCl2-H2O纳米流体.对BaCl2溶液和纳米流体进行同步蓄冰放冷实验,实验表明:加入纳米TiO2粉体后,在融冰放冷时纳米流体融冰速率要比BaCl2溶液大,在同样时间内纳米流体放冷量要多于BaCl2溶液,在换热器中纳米流体总的传热系数要大于BaCl2溶液的,表明纳米粒子有助于强化蓄冷剂的传热性能.     

部分负荷蓄冷空调系统设计选型探讨

以无锡某大型综合商场的冰蓄冷主机选型为例,针对带基载的冰蓄冷系统主机、蓄冰装置选型进行初步探讨,指出规范(JGJ158-2008《蓄冷空调工程技术规程》)在计算带基载的冰蓄冷主机时的不明确之处,以期为冰蓄冷系统的快速选型提供参考。     

The cooling effect of green spaces as a contribution to the mitigation of urban heat: A case study in Lisbon

Green areas in the urban environment can contribute to the mitigation of the Urban Heat Island. In a context of climate change, with the expected increase in temperature, dryness and intensity of heat waves, green areas assume even higher importance as they can create a cooling effect that extends to the surrounding areas. This study analyses the thermal performance of a small green space (0.24 ha) and its influence in the surrounding atmospheric environment of a densely urbanised area in Lisbon. Measurements of weather parameters (temperature, relative humidity, wind speed, solar and infrared radiation) were carried out along a selected path, starting from inside the green area to surrounding streets with different orientations and solar exposure. It was found that the garden was cooler than the surrounding areas, either in the sun or in the shade. These differences were higher in hotter days and particularly related to the mean radiant temperature (Tmrt). The highest difference found was of 6.9 °C in relation to air temperature and 39.2 °C in relation to Tmrt; in both cases this difference occurred between the shaded site inside the garden and the sunny site in an E–W oriented street in the southern part of the studied area. Besides the local weather conditions, particularly the low wind speed, the sun exposure and the urban geometry are the potential factors that explain these differences. The cooling effect of green areas on the surrounding environment can be enhanced by additional measures related to the urban features of each city.     

沥青混凝土现场冷再生技术初探

针对当前严峻的形式。对现场冷再生技术进行了探讨,具体介绍了目前国内现场冷再生研究情况,对结构设计、混合料设计、添加剂的使用情况、施工工艺、机械设备方面进行了分析,旨在大力推进我国冷再生技术的完善,从而使冷再生技术能够在我国得到广泛的应用。     

小型蓄冷空调系统研究

本文阐述小型蓄冷空调系统的工作原理和循环系统，并通过实验分析了相变蓄冷材料的凝固点、融解点、融解热等热学性能。在热性能分析中，用示差扫描量热仪(DSC)来测定蓄冷材料的融解热，用温度测量仪器来测定蓄冷材料的凝固点和融解点，通过热性能分析找到了一种新型蓄冷材料，该蓄冷材料可被应用于小型蓄冷空调系统中。     

高温水蓄冷过冷空调系统性能研究

阐述了高温水蓄冷过冷空调系统原理，对该新型蓄冷过冷空调系统若干方案进行了选择，特别是对蓄冷水箱的掺混度进行了研究，建立了空调用蓄冷水箱内温度分层特性数理模型，模拟了蓄冷水箱内温度分布规律，并与实验值进行了比较，两者基本吻合，该模型可为水蓄冷系统储水相的设计和运行提供理论依据。     

一种制冷式气体激光器装置

本文报道一种用蒸发器冷却放电管的CO_2气体激光器,并给出它的工作特性.