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我很赞成一个观点,就是一个好建筑就是好看好用。比如机场,它的功能看似复杂,系统多、技术多。但归根到底,可以总结在三个层面的含义。 相似文献
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随便提起一件瑞典人的创新,大多数人都不会感到陌生,比如拉链、安全火柴、三点式安全带、心脏起搏器、涡轮增压发动机、电脑鼠标、移动电话、伽玛刀,Skype公司开发的互联网电话系统以及由Spotify公司提供的在线音乐播放,等等。 相似文献
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当前,电阻炉温度自动调节的方式很多,其执行元件可分为两大类:其一、有触点系统,比如用接触器作执行元件。其二、无触点系统,比如用可控硅,双向可控硅等作执行元件。前者噪音大,控制精度差,一般属于位式控制。后者线路复杂,可靠性差,维护工作量大。 相似文献
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对未来供热技术潜在进展方向进行了论述。内容涉及供热与空调行业和融合、供热行业生产模式的变化,并介绍了几种典型的系统,比如多联产系统、分布式家庭能源中心、热泵技术的综合利用,提出了供热空调工程的个性化、精细化的构想。 相似文献
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在木质建筑物内,由于地震或强风引起的侧向受力经常被木质剪力墙和隔板系统(屋项和/或地板)所阻挡。侧向受力足从屋顶或地板经过隔板作用传递到支撑剪力墙并最终进入地基的。图1是木质剪力墙和隔板的主要建筑构件。木质构架和嵌入盖扳,比如胶合板或定向纤维板(OSB),被各种扣件(钉子或钩环)帘子连在一起。另外,剪力墙还可用于抛锚设备,并且大型隔板可能需要用弦杆铰接。 相似文献
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第一种是寻求可替代汽油、柴油的液体燃料,比如乙醇、甲醇。目前绝大数汽车所依赖的燃料来源主要包括石油、天然气及煤,正是对这些化石燃料的需求增长导致了全球能源、气候危机。 相似文献
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武汉市某酒店节能型空调冷热源方案的选择 总被引:1,自引:1,他引:0
根据现有能源结构,结合武汉某宾馆空调冷热源方案的选择,对螺杆式冷水机组加燃气锅炉、螺杆式冷水机组加蓄热式电热锅炉、水源热泵机组3种类型的冷热源方案进行了技术、经济性比较和分析。结果显示:螺杆式冷水机组加燃气锅炉方案初投资最低、运行费用较少,是该酒店最合适的节能型冷热源。 相似文献
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新型直燃集成式生活垃圾焚烧技术是一种与环境发展相协调的生活垃圾处理技术。该技术采用独特的空气预热的设计结构,简化了焚烧炉的结构,提高了烟气热利用的效率。通过实验表明:该焚烧技术具有二次污染小,焚烧稳定,处理效率高的特点。其中二次燃烧室排放的烟气中CO浓度低于80mg/m^3,SO2浓度低于312mg/m^3,HCI浓度低于187mg/m^3,NOx浓度低于107mg/m^3,排放尾气中二恶英类物质毒性含量低于0.2ng—TEQ/m^3;灰渣的重金属毒性浸出含量低于国家危险废物毒性浸出标准。 相似文献
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A novel micro CCHP system, which is based on a two bed silica gel–water adsorption chiller, is constructed in this work. To reveal the chiller characteristic in this system, a transient model of the adsorption chiller is developed. According to the comparison of the simulated results and experimental data, the presented model shows a good performance in predicting the chiller performance, with both stable and variable heat source temperature. With the analysis of simulated results, it is found that the cooling capacity and the coefficient of performance (COP) of the chiller are influenced significantly by the average value and variation rate of electric load, as well as the average value of cooling load. The water tank also shows a great effect on the chiller performance. To get better performance of the chiller, the water tank should be adopted when the electric load is low or its variation rate is positive, and should not be utilized when the electric load is high or its variation rate is negative. A 500 L water tank is recommended in order to get better performance and acceptable start-up time. Furthermore, to get better performance as well as higher security, a cold accumulator should be adopted. 相似文献
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针对武汉嘉叶宾馆空调扩建工程,文章对螺杆式冷水机组加燃油锅炉,螺杆式冷水机组加蓄热式电热锅炉,直燃型溴化锂吸收式冷温水机组3种类型的冷热源方案进行了技术、经济性分析,作者认为,螺杆式冷水机组加燃油锅炉方案最合适。 相似文献
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对火力发电厂矩形烟风管道设计中的难点进行了讨论,分析了矩形管道进行计算机辅助计算的可行性.提出了解决方案,介绍了开发的一套辅助计算系统。应用该系统可高效便捷地解决烟气脱硫系统中壁板厚度取值的问题。 相似文献
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Air-to-water heat pumps using CO2 as a natural refrigerant have been developed and commercialized. They are expected to contribute to energy saving in residential hot water supply. The objective of the research is to analyze the performance of a water heating system composed of a CO2 heat pump and a hot water storage tank by numerical simulation. In this paper, the system performance is analyzed under a daily change in a standardized hot water demand, and some features of the temperature distribution in the storage tank and the system performance criteria such as coefficient of performance, storage and system efficiencies, and volumes of stored and unused hot water are investigated. It turns out that the daily change in the hot water demand does not significantly affect the daily averages of the COP, and storage and system efficiencies, while it significantly affects not only the daily change in the volume of hot water unused after the tapping mode, but also that in the volume of hot water stored after the charging mode. The influence of the daily change in the hot water demand on the volumes of stored and unused hot water is clarified quantitatively. 相似文献
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论述了凝汽器内水垢的水垢对汽轮机运行的影响,介绍了自转塑料纽带的工作原理及热电企业运行塑料纽带自动旋转达到除垢防垢、强化传热、节能降耗,最后提出了应用建议。 相似文献
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Thermodynamic studies of a HAT cycle and its components 总被引:1,自引:0,他引:1
The electric power grid contains more and more renewable power production such as wind and solar power. The use of renewable power sources increases the fluctuations in the power grid which increase the demand for highly efficient, fast-starting power-producing units that can cope with sudden production losses. One of the more innovative power plant cycles, that have the potential of competing with conventional combined power plants in efficiency but has a higher availability and faster start up time, is the Evaporative Gas Turbine (EvGT) or Humid Air Turbine (HAT). A thermodynamic evaluation of different HAT cycle layouts has been done in this paper. Each layout is evaluated separately which makes it possible to study different components individual contribution to the efficiency and specific power. The thermodynamic evaluation also shows that it is important to look at different cool-flow extracting positions. The effect of water temperature entering the cycle, called make-up water, and where it is introduced into the cycle has been evaluated. The make-up water temperature also affects the optimal pressure level for intercooling and it is shown that an optimal position can be decided considering design parameters of the compressor and the water circuit. 相似文献
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水权制度在实现水资源多元价值方面发挥着不可替代的作用,是解决我国水危机的关键所在。但目前我国水权制度存在的问题主要是理论界对水权的认识模糊、水资源产权界定不清、水资源管理体制不畅以及水权转让、交易制度不完善等。因此,本文对水权的涵义作了比较分析,并就我国水权制度体系中存在的问题提出了完善的建议。 相似文献