高Si/C高强度铸铁中C、Si、Si/C的作用及其选择

本文叙述了高Si/C高强度灰铸铁中碳、硅元素存在的形式及其对结晶过程的影响。试验表明,当碳当量一定时,随着Si/C的升高,初生奥氏体枝晶数量增多并且细化和强化,从而构成了强度的基础。该铸铁的强度模式应为“初生奥氏+共晶团”。本文对E型石墨存在的必然性和合理性也进行了讨论。     

碳限额与交易约束下的企业制造/再制造生产决策

目的/意义随着再制造经济效益和环境效益凸显,越来越多的企业进入再制造领域,与原制造商进行竞争或合作。考虑到碳排放约束,企业面临的生产决策更加复杂。设计/方法基于消费者对新产品和再制造产品的异质需求,构建了制造商和再制造商之间的竞争与合作博弈模型,探讨碳税对制造/再制造决策的影响;结合数值仿真,分析了竞争与合作模式下碳税对企业利润及碳排放的影响。结论/发现不同模式下,企业可根据再制造产品碳排放强度选择不同的生产策略;碳税总是会抑制新产品的生产,当再制造产品碳排放强度低于一定数值时,碳税会促进再制造产品的生产;再制造商竞争会挤兑新产品,使制造商利润减少,再制造门槛提高;当碳税不超过一定限度时,合作模式能够实现经济效益和环境效益双赢。     

碳交易市场的监管机制研究

应对气候变化、控制温室气体的政策催生了碳交易,也诞生了碳交易市场。碳交易市场作为一种特殊的新兴市场,兼具环保市场、能源市场和金融市场的特点,这些特性导致各国政府需要对该市场进行严格的监管,以防止市场滥用、价格操纵、市场欺骗等现象,保障温室气体减排行为和市场行为健康发展。我国目前已经建立了若干可从事碳交易的交易所,部分省份正在进行碳交易试点,碳交易市场机制及监管机制必须同时建立及完善。碳交易市场的监管体制和制度是综合的,监管主体包括综合经济管理、环保、能源和金融管理等部门。     

人口因素对CO2排放的影响——基于面板分位数回归的实证研究

基于1995～2009年中国省际面板数据,利用面板分位数回归模型估计人口因素对我国CO2排放量的影响,结果显示:人口数量和人口城市化率是影响我国CO2排放的主要人口因素,但从影响大小上看,人口数量变化对发达省份CO2排放的影响大于欠发达省份,而人口城市化率则对欠发达省份的CO2排放具有更大的影响;家庭小型化对CO2排放的影响因省而异,对不同省份,要么没有明显的影响,要么可能导致CO2排放量增加;年龄结构目前还不是导致我国CO2排放量变化的主要人口因素;综合比较而言,经济发展水平对CO2排放的影响大于人口各因素,产业结构对CO2排放的影响小于人口数量和人口城市化率,而技术进步与CO2排放的关系则显得模糊。     

The Transnational Tilt of the Treadmill and the Role of Trade Openness on Carbon Emissions: A Comparative International Study, 1965–2010

There are various schools of thought regarding the relationship between the environment and economy. Ecological modernization argues that the harmful effects of economic growth and development on the environment decline through time, whereas the treadmill of production and ecologically unequal exchange postulate different perspectives. This study relies on World Bank and World Resources Institute data for the period of 1965–2010. Time‐series cross‐sectional Prais‐Winsten (PW) regression models with panel‐corrected standard errors (PCSE) are employed to examine whether economic growth and trade openness intensified or decoupled in relation to three measures of carbon dioxide (CO₂₎ emissions during this period. The findings of this study indicate that there has been a “tilt” in the treadmill of production—that is, the most environmentally degrading production processes have moved to less developed countries. Furthermore, integration into the world economy has been associated with an intensification in CO₂ emissions for less developed countries. Surprisingly, however, this phenomenon does not seem to be driven by exports sent to high‐income nations, suggesting that there are mechanisms embodied within the global organization of production that require further exploration.     

Developing spatial inequalities in carbon appropriation: A sociological analysis of changing local emissions across the United States

This study examines an overlooked dynamic in sociological research on greenhouse gas emissions: how local areas appropriate the global carbon cycle for use and exchange purposes as they develop. Drawing on theories of place and space, we hypothesize that development differentially drives and spatially decouples use- and exchange-oriented emissions at the local level. To test our hypotheses, we integrate longitudinal, county-level data on residential and industrial emissions from the Vulcan Project with demographic, economic and environmental data from the U.S. Census Bureau and National Land Change Database. Results from spatial regression models with two-way fixed-effects indicate that alongside innovations and efficiencies capable of reducing environmentally harmful effects of development comes a spatial disarticulation between carbon-intensive production and consumption within as well as across societies. Implications for existing theory, methods and policy are discussed.     

气候变化背景下中国低碳制造发展研究

制造业是我国经济发展的重要支柱,也是实现低碳减排的主要战场。建立低碳制造评价指标体系,结合主成分分析法和层次分析法,可对我国制造业的低碳发展进行定量的研究评价,并从制造业低碳经济、低碳技术和低碳环境三方面分析对碳排放的影响。我国的低碳制造水平整体呈上升趋势,未来,我国的制造业既要保持高速发展,同时也要向低碳经济转型,发展低碳技术,调整能源结构。     

低碳经济发展模式下浙江产业发展路径选择

低碳经济是在较高的经济发展水平上,实现碳排放量比较低的经济形态。在全球的大背景下,发展低碳经济有可能演变成未来全球社会经济发展的主流模式。向低碳经济发展模式转型将通过低碳经济发展所带来的产业外延扩张和产业结构优化,带动经济总量的扩张和经济结构的调整,从根本上、全局上深刻影响社会经济的未来发展战略及路径。     

Informed Public Preferences for Electricity Portfolios with CCS and Other Low‐Carbon Technologies

Public perceptions of carbon capture and sequestration (CCS) and other low‐carbon electricity‐generating technologies may affect the feasibility of their widespread deployment. We asked a diverse sample of 60 participants recruited from community groups in Pittsburgh, Pennsylvania to rank 10 technologies (e.g., coal with CCS, natural gas, nuclear, various renewables, and energy efficiency), and seven realistic low‐carbon portfolios composed of these technologies, after receiving comprehensive and carefully balanced materials that explained the costs and benefits of each technology. Rankings were obtained in small group settings as well as individually before and after the group discussions. The ranking exercise asked participants to assume that the U.S. Congress had mandated a reduction in carbon dioxide emissions from power plants to be built in the future. Overall, rankings suggest that participants favored energy efficiency, followed by nuclear power, integrated gasification combined‐cycle coal with CCS and wind. The most preferred portfolio also included these technologies. We find that these informed members of the general public preferred diverse portfolios that contained CCS and nuclear over alternatives once they fully understood the benefits, cost, and limitations of each. The materials and approach developed for this study may also have value in educating members of the general public about the challenges of achieving a low‐carbon energy future.     

制造系统生产单元碳排放核算模型

制造业是我国国民经济的支柱产业,但也是环境污染物排放的主要来源、能源消耗主体和温室气体排放大户。制造系统高能耗、高物耗、高碳排放的加工过程是造成制造业碳排放量大的重要原因。生产单元作为制造系统的加工的主体,其碳排放量的核算是确定整个制造系统乃至制造业碳排放总量的关键。本文首先对生产单元的原材料、电能、辅助物料及废屑处理所引起的碳排放进行分析,确定生产单元的碳排放源;其次,产品合格率的不同会造成生产单元输入及输出的成品/半成品数量的差异,进而影响生产单元单位产品的碳排放量,在此基础上,综合考虑了原材料、电能、辅助物料及废屑处理的碳排放情况,构建了给定工艺流程下生产单元碳排放核算模型。最后,结合一汽车排气装置加工实例,分别核算加工过程中九个生产单元的碳排放量,验证了模型的可行性。