邯钢CSP加热炉的设计原则和特点

根据邯钢CSP加热炉谈判、设计、生产以及维护中积累的经验 ,讲述了CSP加热炉设计应注意的几个重要问题 ,使之能更好地满足薄板坯连铸连轧生产的要求     

基于最优控制极小值原理的加热炉控制

以微型加热炉为被控对象,以工控机IPC、51系列单片机调节仪为硬件,以Kingview组态王、KingACT软PLC、单片机汇编语言为软件,应用最优控制极小值原理的算法进行控制.本应用不仅具体构建了一个实用的二级分布控制系统,还为覆盖大部分典型工业应用的控制系统和系统集成提供了廉价通用的实验实训平台.文中介绍了系统组成、对象数学模型的建立、采用飞升曲线法在线测试对象特性参数、最优控制算法的建立以及具体算法的实现.     

GN30型10kV隔离开关的技术改进

通过对马钢51^#变电所GN30型10 kV隔离开关发热故障现象进行技术分析,提出了改造建议,实施后经跟踪回访,运行情况良好。     

高层建筑回水箱分层式供暖系统设计与应用

针对高层建筑双水箱分层供暖系统，提出一种旨在取消有给水箱的回水箱系统，分析该系统的可行性与特点，给出设计方法。     

Primary energy and comfort performance of ventilation assisted thermo-active building systems in continental climates

This article presents a simulation study comparing the primary energy and comfort performance of ventilation assisted thermo-active building systems (TABS) relative to a conventional all-air (VAV) system in a compact office building featuring good thermal envelope performance, heat recovery, and solar gain control for the continental climate of Omaha, Nebraska with pronounced heating and cooling periods. TABS heating is accomplished using a geothermal heat pump and TABS cooling using a geothermal heat exchanger without an additional vapor compression cycle required. It was found that the coordination of the TABS and VAV systems is crucial, i.e., supply air temperature and active layer temperature setpoints and reset schedules greatly affect the performance of the overall system. The small contribution of TABS in the heating case shows the need for the adaptation of the ventilation system configuration to the TABS system. Annual cooling energy demand for the ventilation assisted TABS is higher than for the pure VAV system, which is due to lower occupied period room operative temperatures and thus a higher comfort provided. While a 4% useful energy penalty for the combined TABS/VAV was recorded, the VAV case requires 20% more delivered energy than the TABS case because of the displacement of compressor driven coil loads with low-exergy cooling through the ground heat exchanger in the TABS case. A primary energy intensity of 189 kWh/m² a was recorded for the TABS case; in contrast, the conventional all-air (VAV) equipped building incurs a primary energy intensity of 229 kWh/m²a, which represents a penalty of 20%. Clear advantages of the TABS approach can be observed with respect to thermal comfort: during summer cooling periods, the mean radiant temperature of the TABS case is on average 2 K below that of the VAV case. Moreover, the VAV system is associated with a fairly constant predicted mean vote (PMV) value of 0.75, which is quite warm, while the TABS equipped system reveals an average of 0.56, which results in only 12% instead of 17% of people dissatisfied. Based on these results, ventilation assisted thermo-active cooling systems appear to be a very promising alternative to conventional all-air systems offering both significant primary energy as well as thermal comfort advantages provided the TABS is mated with low-exergy heating and cooling sources.     

西藏自治区民用建筑采暖设计地方标准简介

标准结合西藏的能源供应模式和生态特点,提出通过主、被动式太阳能利用和建筑保温方法解决当地的采暖问题,主动式供暖系统以太阳能热水为主要热源;标准涉及供暖室内外计算参数的确定、热负荷计算、太阳能热水系统设计等方面,为当地民用建筑供暖制定了设计依据.     

T91／P91钢的性能分析及焊接工艺

金属材料在火力发电厂的重要性是不言而喻的，它直接关系到机组的使用寿命和安全经济运行。介绍了T91／P91钢的化学成分和主要物理性能，分析了T91／P91钢的力学性能和抗氧化腐蚀性能，给出了T91／P91钢的焊接工艺和方法，指出了需要进一步研究的问题。     

弹性支吊架在热力管网中的应用

介绍了常用弹性支吊架种类及选择计算方法，提出了增加管道自然补偿能力的措施，并用ＣＡＥＳＡＲⅡ应力计算软件对Ⅱ型管系进行了应力分析，以计算例证说明了弹簧支吊架的作用     

基于超疏水表面的主被动复合防/除冰技术研究进展

介绍了光热、电加热、磁能、声波能与超疏水表面相结合的主被动复合防/除冰技术及其机理与应用，阐述了以上复合型防/除冰技术的优势与不足。其中，光热复合技术具有耗能低、材料选择多样化等优点；电加热复合技术工艺简单，易于规模化制造；磁能复合技术可满足复杂场景的防/除冰应用需求；声波复合技术则具有结构简单的优势。此外，同时复合多种能场可进一步提升防/除冰工作效率，是主被动复合技术的发展趋势之一。最后，阐述了基于超疏水表面的主被动复合防/除冰技术的不足之处，并展望了复合防/除冰技术的应用研究前景。     

The passive solar heated school in Wallasey. VII. Window opening behaviour and the microclimate of a classroom

Previous work on factors which influence the opening or closing of windows suggests that at low ambient temperatures movement might be associated with odour levels, at intermediate temperatures, with ambient humidity and at higher ambient temperatures with the need to cool buildings. The data on window position, together with other physical measures during the period of observation in the Wallasey School, has been examined to see what quantity is most closely associated with window position. It appears that in the classroom the number of open windows depends mainly upon air temperature, but it also depends markedly on time of day.