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本文采用蓄能型水源热泵系统解决某企业职工生活热水及餐厅夏季供冷需求,详细介绍了系统设计方案及热泵的机组的原则方法,并分析了该系统的经济性。结果表明,与燃油或燃气锅炉加分体式空调系统相比,蓄能型水源热泵具有显著的经济效益,可以广泛用于地表水丰富地区生活热水供应及空调系统,对实现企业节能减排、降低能源费用等具有重要作用。 相似文献
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提出把水环热泵系统应用于夏热冬暖地区的住宅建筑.通过水环热泵系统把每户的空调主机和热水器连接起来,可以回收空调冷凝热来制取生活热水,实现夏季同时供冷和供应生活热水.介绍了3种在住宅中应用的水环热泵系统形式,并对其特点进行了分析.最后通过与分体式空调器加电热水器相比,得出结论:水环热泵空调系统在夏热冬暖地区住宅建筑中应用... 相似文献
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结合重庆地区某湖水源热泵空调系统,实测并分析了负荷率、热泵机组热水进口温度、取水功率对热泵机组制热性能系数、热泵空调系统能效比的影响。 相似文献
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本文通过能源塔热泵技术在南京解放军454医院空调系统节能改造中的实际应用,介绍了能源塔热泵系统的组成及原理、能源塔热泵系统在我国长江以南地区应用的可行性及应用前景,明确了能源塔热泵技术可以作为我国长江以南地区供冷、供热及生活热水一体化供应的新形式推广应用。 相似文献
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对钢钎锚点进行承载力实验,通过数据分析及曲线对比探讨几种钢钎锚点典型用法下的承载力,为各级各类救援队伍提供实战参考。结果表明,钢钎锚点在规定设置要求下,单根钢钎承载力与插入土壤的深度关系不大。单根钢钎插入全长的2/3和4/5,承载力平均值分别为4.199 kN 和4.564 kN;钢钎系统承载力明显大于单根钢钎,两根钢钎系统承载力平均值为8.352kN,三根钢钎系统承载力平均值为10.446 kN。在野外绳索救助实战条件允许的情况下,钢钎系统是更佳的选择,尤其是3 根钢钎系统。 相似文献
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本文针对目前市场上水管式户式中央空调系统出现的问题,通过分析提出改进的方法,最后以水系统为研究对象,定性、定量地分析系统冷、热量的得与失,并结合水管式户式中央空调的实际运行情况,计算出不同工况下相应的系统水容量和辅助热源的热量。 相似文献
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《Planning》2018,(1)
Based on the in-depth study on the theory of tourism carrying capacity at home and abroad, author of this paper defined the concept and connotation of tourism carrying capacity, and proposed the evaluation index system of tourism carrying capacity. He also conducted a systematic analysis of tourism resources in the Jokhang Temple scenic spot, constructed an evaluation index system of tourism carrying capacity of the Jokhang Temple scenic spot, pointed out the status quo of its carrying capacity and factors constraining the carrying capacity through quantitative calculation, and put forward suggestions to regulate its carrying capacity. 相似文献
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在污水系统规划中,扩大规模需要考虑纳污河流的环境承载力。利用一维水环境模型,计算了DQ县两纳污河流的水环境容量。结果表明,当前的环境剩余容量无法满足污水系统中远期规划的要求,上游来水断面的污染物浓度是提高剩余环境容量的重要约束条件。污水系统规模的扩大需要在改善现有水环境的条件下进行。 相似文献
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《钢结构》2012,(2):82-83
剪力墙系统常用于高层建筑结构中抵抗侧向荷载。复合钢板剪力墙(CSPSW)系统具有承载力高、延展性好、耗能能力强等特点,越来越多的用于钢结构中以抵抗侧向荷载。介绍了钢板剪力墙(SPSW)和复合钢板剪力墙(CSPSW)的相关试验。对两个1/3缩尺抛光试样进行焊接和测试,试验剪力墙系统由混凝土填充圆形中空截面(CHS)钢管柱、钢梁和SPSW或CSPSW组成。对试验结果进行分析和总结,结果显示SPSW和CSPSW系统具有良好的延展性和耗能能力。SPSW系统主要用于抵抗侧向荷载作用下薄壁钢板屈曲产生的薄膜张力引起的层间剪力。CSPSW系统中附加在钢板两侧的混凝土加固(RC)镶嵌板主要用于确保复合材料的性能,防止钢板屈曲。与SPSW系统相比,CSPSW系统的承载力和耗能能力显著增强。 相似文献
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《Thin》2012
Shear wall systems are one of the most commonly used lateral-load resisting systems in high-rise buildings. The composite steel plate shear wall (CSPSW) systems have strong points, such as high bearing capacity, good ductility and energy dissipation capacity, which have been increasingly used as lateral load-resisting system in steel buildings. This paper describes the experimental work related to the tests of steel plate shear wall (SPSW) system and CSPSW system. Two 1/3 scaled specimens were fabricated and tested. The tested shear wall system consisted of concrete-filled circular hollow section (CHS) steel columns, steel beams, and SPSW or CSPSW. The experimental results were summarized and discussed, which showed that both SPSW system and CSPSW system possessed good ductility and energy dissipation capacity. For SPSW system, the primary mechanism for resisting storey shear arising from lateral loads came from the post-buckling inclined tension field that forms for thin-walled steel plate. For CSPSW system, the reinforced-concrete (RC) panels attached on both sides of steel plates were able to ensure the composite action by preventing the overall buckling of steel plate. Compared with SPSW system, the bearing capacity and energy dissipation capacity of CSPSW system increased evidently. 相似文献
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A new classification system for the joints in lattice shells is proposed. The stiffness and moment capacity of the joints together with the overall structural behavior of the lattice shells are considered in order to establish the classification system. According to this new system, joints in lattice shells can be classified into unique categories: rigid, semi-rigid or pinned. The rigid joints have both high bending stiffness and moment capacity; the semi-rigid joints have both moderate bending stiffness and moment capacity, and the pinned joints have either low bending stiffness or low moment capacity. Determination coefficients α and β are defined, based on the stiffness and moment capacity of the joints, and these are used to establish clear boundaries between the different categories. Some numerical examples are included to demonstrate the validity of the classification system. With the help of the classification system, an efficient process for practical engineering design is proposed, which can help designers choose the appropriate analysis method for lattice shells with different joints. 相似文献
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基于停车需要,提出了隔层耗能桁架抗侧式立体停车结构,并用有限元法对其中隔层耗能桁架式抗侧力体系在低周往复荷载作用下的性能进行了研究,分析了桁架耗能梁段长度对抗侧力体系的刚度、承载力、延性、耗能性能等的影响。结果表明:随着耗能梁段长度的不断增大,隔层耗能桁架式抗侧力体系的刚度、承载力、延性和耗能性能都存在一定程度的减小和退化;剪切屈服型隔层耗能桁架式抗侧力体系的耗能性能比弯曲屈服型的要好,但剪切屈服型的耗能梁段也不能设计得太短,否则会影响体系耗能性能的充分发挥。 相似文献