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41.
介绍了对变温变压工艺条件下分子筛清除二氧化碳的能力的试验研究,并依据分子筛性能试验的结果进行了100人型分子筛二氧化碳清除装置的概念设计。 相似文献
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This paper is the world first to investigate the CO2 impact of railway resurfacing in ballasted track bed maintenance. Railway resurfacing is an important routine maintenance activity that restores track geometry to ensure safety, reliability and utility of the asset. This study consisted of an extensive field data collection from resurfacing machineries (diesel-engine tamping machines, ballast regulators and ballast stabilisers) including travel distances, working distances, fuel consumption and construction methodologies. Fuel consumption was converted to a kg CO2/m using the embodied energies of diesel. Analyses showed that tamping machines emitted the highest CO2 emissions of the resurfacing machineries, followed by ballast regulators and ballast stabilisers respectively. Tamping machines processed 4.25 m of track per litre of diesel, ballast regulators processed 6.51 m of track per litre of diesel and ballast stabilisers processed 10.61 m of track per litre of diesel. The results were then compared to previous studies and a rigorous parametric study was carried out to consider long-term resurfacing CO2 emissions on Australian railway track. The outcome of this study is unprecedented and it enables track engineers and construction managers to critically plan strategic rail maintenance and to develop environmental-friendly policies for track geometry and alignment restoration. 相似文献
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碳纤维布在连拱隧道衬砌裂缝病害治理中的应用 总被引:1,自引:0,他引:1
延安至安塞高速公路墩山连拱隧道主体工程完工后,衬砌出现了不同程度的裂缝和渗漏水等病害,通过对衬砌裂缝特征、产生原因的分析,并根据裂缝的开裂程度与发展规律,采用碳纤维布对隧道衬砌裂缝进行了局部修复和整体加固补强。由于在施工过程中严格控制施工工艺和施工质量,达到了预期效果。通过碳纤维加固模拟和监测表明:衬砌裂缝得到了有效控制,支护受力处于安全状态,围岩稳定,碳纤维布加固效果显著。 相似文献
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General concern and knowledge on climate change have been increasingly studied over the past decades. Gender differences have been found for general environmental concern and knowledge, but mixed findings exist with respect to climate change. In transportation, research has examined potential relations between environmental attitudes and transportation behavior, with mixed findings as well. Recently, the use of carbon dioxide (CO2) emissions information to influence choice has been tested with women being found more willing to pay to reduce their personal impacts, suggesting that women are either more willing to change or that their response to information on climate change is stronger. However, those studies used CO2 mass and studies that examined understanding of CO2 information as a mass have found that people struggle to understand it. If concern and knowledge about climate change differ amongst individuals, then, according to theories such as the Transtheoretical Model, the type of information used to motivate choices is likely important. Using a unique data set (n = 236) it is possible to take a first look at how gender might affect concern, knowledge, and action in terms of transportation and climate change. Further, it is also possible to examine behavioral responses to transportation climate change information. Finally, an empirical analysis is conducted of the effect of how the information is presented might differ by gender. Thus, this work aims to investigate whether gender differences might contribute to the explanation of individual behavioral responses (from concern to action) in a transportation climate change context. 相似文献
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Air travel is considered the biggest individual climate sin. Avoiding flying, however, seems impossible. In this paper we argue that the flight a passenger chooses can be significant. For this purpose we compared the carbon emissions of selected flights in three geographical markets. We found tremendous differences in the environmental performance of individual flights. Furthermore, we also found that flying with the most modern aircraft or flying non-stop represents, in many cases, the least polluting option. Nevertheless, we were able to show that there are exceptions to this rule. Based on our results, we provide recommendations to the industry and for further research. 相似文献
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为探究城市空间集约和土地高效利用背景下城市中心区地下公共空间与轨道交通一体化发展的低碳效应,梳理城市中心区地下公共空间与轨道交通一体化发展在构成要素、开发生命周期等方面的特征,分析一体化策划、规划、设计、建造和运维等发展阶段对促进“双碳”目标实现的作用与意义;
构建基于“双碳”目标的包含城市轨道交通发展、城市发展、一体化的低碳效应、城市中心区发展和城市中心区开发5项准则层指标在内的22项指标的一体化测度指标体系,综合运用层次分析法和模糊综合评价法构建城市中心区地下公共空间与轨道交通一体化发展评价方法体系。以南京新街口中心区2005年、2010年、2014年和2019年4个典〖JP2〗型阶段为例进行评价,结果分别为2.349、3.105、3.588和4.222,对应的一体化发展水平分别为较差、中、良和良。对照南京新街口中心区渐进式一体化发展历程可知,南京新街口中心区地下公共空间与轨道交通一体化发展对促进区域“双碳”目标实现作用显著。 相似文献
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In this paper, airline energy efficiency is divided into two stages: Operations Stage and Carbon Abatement Stage. This new two-stage operating framework is a modification of existing ones. Then the model, Network SBM with weak disposability, is presented to evaluate the efficiency of 22 international airlines from 2008 to 2012. The results show that: (1) Most airlines’ energy efficiencies have not declined in the period. (2) The average efficiency of European airlines is higher than that of non-European airlines. (3) Non-European airlines have smaller advancements in efficiency score than European airlines. (4) Most airlines’ efficiencies in Operations Stage are higher than Carbon Abatement Stage. 相似文献