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通过对上海两地铁车站的蒸发冷凝空调系统和普通冷水机组空调系统进行夏季能效测试,分析了蒸发冷凝空调系统的运行和节能情况,发现与普通冷水空调系统相比,蒸发冷凝空调有较高的单机能效系数和系统能效系数,但耗水量稍大。利用测试数据,讨论冷凝器进风湿球温度对机组能效的影响,并结合上海地铁车站新风排风湿球温度变化特点,提出利用地铁排风更有助于提高机组运行能效。 相似文献
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以某地铁站为例介绍了蒸发冷凝式螺杆冷水机组在地铁车站空调系统中的应用,介绍了蒸发冷凝式螺杆冷水机组的工作原理,从节地、节能、节水、设备初投资、运行维护等方面与传统水冷式螺杆冷水机组进行了比较,结果表明,蒸发冷凝式螺杆冷水机组更加节能、绿色、环保,能够实现经济效益、社会效益和环境保护效益的统一。 相似文献
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在杭州地铁4号线部分车站采用蒸发式冷凝冷水机组,取消地面设置的冷却塔,对所采用的蒸发式冷凝冷水机组从机房布置、噪声处理,改善循环水品质等方面进行论述,并进行了年能耗的经济性分析。结果表明,蒸发式冷凝冷水机组的采用,不仅使规划协调难度大为降低,而且运行成本较低。 相似文献
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The survival capacity of an Aeromonas hydrophila strain (named SB14) isolated from mineral water was investigated in an artificial mineral water microcosm. The bacterial count of this microorganism was compared with two strains of other species from aquatic environments (Pseudomonas fluorescens SSD and Pseudomonas putida SSC) and a bacterium indicative of faecal pollution (Escherichia coli ATCC 25922). Among the strains, all added to sterile Pyrex glass flasks (1 l) to yield a final bacterial count of about 5 x 10(6) CFU/ml, A. hydrophila SB14 showed a quite strong survival capacity (150 days), even though the Pseudomonas strains were better adapted to this habitat (more than 240 days). E. coli ATCC 25922 was the least well fitted to survive and was no longer detected after 70 days. When A. hydrophila SB14 was inoculated together with one or two of the above strains, its survival appeared to be dependent on interaction with other organisms. A marked decrease in survival by 30 days, possibly due to antagonistic interaction, was observed when this microorganism was associated with E. coli ATCC 25922, and an increase by 30 and 60 days, possibly due to commensalic interaction, was obtained when A. hydrophila SB14 was inoculated with P. fluorescens SSD or P. putida SSC, respectively. 相似文献
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《Planning》2016,(6)
为了考察气提式曝气增氧装置在海水养殖水池内的性能表现和溶氧扩散分布规律,自行设计了一种气提式曝气除沫装置,并安装于海水养殖生产车间水池内运行,通过定时定点取样测定池水中的溶解氧浓度,分析该装置运行时养殖池内溶解氧的分布状态,进而确定该装置增氧的性能指标。结果表明:安装自行设计的气提式曝气除沫装置后,通过实际测试,氧转移系数(K_(La(20)))为0.77h~(-1),氧转移效率(E_A)为5.20%,曝气动力效率(E_p,以O_2计)最高可达4.33 kg/(kW·h);经测定,在养殖水池内各个取样点溶解氧分布均匀,溶解氧浓度同步增加。研究表明,本研究中设计的曝气装置及其布置形式因省去动力循环能耗,曝气动力效率显著提高。 相似文献
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混凝土叠合板施工质量是装配式建筑工程楼板质量控制的要点和难点。通过对某公司办公综合楼工程施工的现场跟踪记录,详细分析了叠合板安装定位的施工过程,包括安装要求、工艺流程、操作要点、质量控制标准和措施等,尤其着重分析了预制梁、板接触面不平整采取的施工措施,总结了将预制板与预制梁接触的梁面粗糙面打磨平整,采用聚乙烯棒填充预制梁、板接触面及预制板拼接缝,采用水泥砂浆抹成倒角等保证和提升施工质量的施工技术改革措施。 相似文献
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《Planning》2022,(6)
为了考察气提式曝气增氧装置在海水养殖水池内的性能表现和溶氧扩散分布规律,自行设计了一种气提式曝气除沫装置,并安装于海水养殖生产车间水池内运行,通过定时定点取样测定池水中的溶解氧浓度,分析该装置运行时养殖池内溶解氧的分布状态,进而确定该装置增氧的性能指标。结果表明:安装自行设计的气提式曝气除沫装置后,通过实际测试,氧转移系数(K_(La(20)))为0.77h(-1),氧转移效率(E_A)为5.20%,曝气动力效率(E_p,以O_2计)最高可达4.33 kg/(kW·h);经测定,在养殖水池内各个取样点溶解氧分布均匀,溶解氧浓度同步增加。研究表明,本研究中设计的曝气装置及其布置形式因省去动力循环能耗,曝气动力效率显著提高。 相似文献
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K. M. Gwilliam 《The International journal of environmental studies》2013,70(1-4):287-292
There are three distinct kinds of problems with which the urban transport planner has to deal. Congestion is the one to which both analytical and policy making effort have been traditionally directed. More recently environmental objectives and a concern for the transport facilities available to disadvantaged groups have been given a higher priority. Unfortunately, neither of these objectives is adequately catered for by standard analytical methods or transport planning instruments and recent analytical and institutional developments embody attempts to rectify this defect. But the task of converting good intentions in these respects into good policies is complex and some of the apparently obvious solutions, such as public transport subsidy, may even be counterproductive. It would be unwise to expect any cheap and easy solutions to the problems to emerge. 相似文献