国外河口城市气候变化适应策略及对中国的启示

<正>河口地区是遭受气候变化影响最为严重的区域之一。密集的人口、繁荣的经济使得河口城市根据当地的气候变化威胁制定相应的适应策略变得尤为重要和紧迫。英国伦敦、美国纽约和新奥尔良、日本东京、加拿大温哥华等国际重要河口城市已经制定了详尽的适应气候变化策略,其中有很多有益的经验值得我国的河口城市学     

Global economic implications of alternative climate policy strategies

This paper investigates the world economic implications of climate change policy strategies, and particularly evaluates the impacts of an implementation of clean development mechanisms (CDM), joint implementation (JI) and emissions trading with a world integrated assessment model. Of special interest in this context are welfare spill over and competitiveness effects resulting from diverse climate policy strategies. This study elaborates and compares multi-gas policy strategies and explores the impacts of sink inclusion. We furthermore examine the economic impacts on all world regions of the USA’s non-cooperative, free rider position resulting from its recent isolated climate policy strategy decision.It turns out that CDM and JI show evidence of improvement in the economic development in host countries and increase the share of new applied technologies. The decomposition of welfare effects demonstrates that the competitiveness effect (including the spill over effects from trade) have the greatest importance because of the intense trade relations between countries. Climatic effects will have a significant impact within the next 50 years, will cause considerable welfare losses to world regions and will intensify if nations highly responsible for pollution like the USA do not reduce their emissions.     

Ecodesign methods focused on remanufacturing

Understanding the product's ‘end-of-life’ is important to reduce the environmental impact of the products' final disposal. When the initial stages of product development consider end-of-life aspects, which can be established by ecodesign (a proactive approach of environmental management that aims to reduce the total environmental impact of products), it becomes easier to close the loop of materials. The ‘end-of-life’ ecodesign methods generally include more than one ‘end-of-life’ strategy. Since product complexity varies substantially, some components, systems or sub-systems are easier to be recycled, reused or remanufactured than others. Remanufacture is an effective way to maintain products in a closed-loop, reducing both environmental impacts and costs of the manufacturing processes. This paper presents some ecodesign methods focused on the integration of different ‘end-of-life’ strategies, with special attention to remanufacturing, given its increasing importance in the international scenario to reduce the life cycle impacts of products.     

Eco-efficiency gains from remanufacturing: A case study of photocopier remanufacturing at Fuji Xerox Australia

Achieving eco-efficient production and consumption systems requires ‘closing the loop’ to create cyclic systems. Product systems based on remanufacturing, where used products or components are restored to ‘as new’ condition for reuse, offer the potential to create such cyclic systems. For some existing manufacturers, the economic efficiency of remanufacturing is clear and it has become a widely held assumption that such systems would also be more eco-efficient. However, this assumption has not been systematically tested. This research attempted to quantify the life cycle environmental benefits achieved by incorporating remanufacturing into a product system, based on a study of Xerox photocopiers in Australia. The study found that remanufacturing can reduce resource consumption and waste generation over the life cycle of a photocopier by up to a factor of 3, with greatest reductions if a product is designed for disassembly and remanufacturing. This research represents a first-level assessment, limited by certain estimates and assumptions. It is intended that this research will form the basis of a larger, more detailed study of Xerox remanufacturing, worldwide.     

绿色再制造工业发展综述

绿色再制造工业是一个新兴工业，能够生产低价格、高品质、高环保的产品来满足公众需求，并为社会发展节约大量能源和材料。绿色再制造工业能够使社会财富进入健康的增长和可持续发展时期。通过综述再制造工业的发展历史、现状和巨大效益，提出再制造业的发展趋势，为再制造工业的研究提供有益参考。     

生命周期清单分析中的分配方法

主要分析了生命周期清单分析中多产品系统和开环再循环系统中所存在的分配问题,详细探讨其分配原则,评述了当前国际学术界和产业界所采用的各种分配方法,结果表明,对等分配法是目前适合于我国国情的比较合理的分配方法     

Development of multi-criteria decision making model for remanufacturing technology portfolio selection

Remanufacturing represents a business opportunity and in many cases a means to promote environmental sustainability. To help enterprises economically and effectively implement remanufacturing, a multi-criteria decision making (MCDM) model for selecting remanufacturing technology is developed. The model considers remanufacturing technology portfolios. The enterprise benefits associated with each portfolio, including economic and environmental benefits, are evaluated using six main criteria: cost, quality, time, service, resource consumption, and environmental impact. In addition, the synergies among the different types of technologies for each remanufacturing technology portfolio are also considered. The pair-wise comparison approach of Analytic Hierarchy Process (AHP) is employed for remanufacturing technology portfolio selection. An illustrative example is provided to lend insights into the application of this methodology.     

A new business model for baby prams based on leasing and product remanufacturing

A shift in business thinking from selling products to providing service solutions to customer needs is becoming noticeable. It is driven by increasing competition and the need to identify new profit centres for producers of mature products. This paper identifies a new product group that could be interesting from the product-service system perspective – baby prams. The study presents a new business model based on selling the function that baby prams provide through leasing prams. It discusses potential barriers and necessary changes in product design and the supply chain to make it work. The product-service system in this case could include the organisation of a reverse logistics system with different levels of refurbishment and remanufacturing of prams, partially by retailers. The new model may provide customers with a high quality pram in a “like new” condition for the period they need it, and may help avoid transaction costs of having to sell the pram on the second-hand market. Economic estimations point to a significant potential for increased profits, while the environmental potential should be further investigated.     

Extreme longevity in a deep-sea vestimentiferan tubeworm and its implications for the evolution of life history strategies

The deep sea is home to many species that have longer life spans than their shallow-water counterparts. This trend is primarily related to the decline in metabolic rates with temperature as depth increases. However, at bathyal depths, the cold-seep vestimentiferan tubeworm species Lamellibrachia luymesi and Seepiophila jonesi reach extremely old ages beyond what is predicted by the simple scaling of life span with body size and temperature. Here, we use individual-based models based on in situ growth rates to show that another species of cold-seep tubeworm found in the Gulf of Mexico, Escarpia laminata, also has an extraordinarily long life span, regularly achieving ages of 100–200 years with some individuals older than 300 years. The distribution of results from individual simulations as well as whole population simulations involving mortality and recruitment rates support these age estimates. The low 0.67% mortality rate measurements from collected populations of E. laminata are similar to mortality rates in L. luymesi and S. jonesi and play a role in evolution of the long life span of cold-seep tubeworms. These results support longevity theory, which states that in the absence of extrinsic mortality threats, natural selection will select for individuals that senesce slower and reproduce continually into their old age.     

A critical assessment of motives for product recovery: the case of engine remanufacturing

Over the past decade, there has been an increasing interest in product take-back, product recovery and the (re-)distribution of these products. The automotive sector, in particular, has a strong history of product recovery operations, such as remanufacturing. Alongside this development, an academic interest in the management of re-use, recycling or remanufacturing has evolved and developed into the field of closed-loop supply chain management. Closed-loop supply chain management, however, is only characterised by a short research history, the earliest contributions can be found on reverse logistics and were published in the early 1990s. Due to the novelty of the field there are still a large number of unsolved research problems. One of these is the question for the rationale behind product recovery operations. This research is based on in-depth case studies within the remanufacturing facilities of a major European Vehicle Manufacturer. The article examines whether the ‘classic’ motives for product recovery are applicable to automotive remanufacturing. It concludes with a summary of the contributions this research makes to theory, to industry and to future research in the field.     

Implementing extended producer responsibility: vehicle remanufacturing in China

With the rapid growth of vehicle population in China and subsequent environmental problems, remanufacturing has become the development direction of the vehicle industry for its huge environmental benefit. However, the current vehicle remanufacturing industry is still in its infancy, which makes the introduction of extended producer responsibility inevitable. This paper describes the development of China’s remanufacturing policies based on EPR and discusses the recycling system in line with the country’s actual conditions. This then can provide some ideas on EPR application to other developing countries.     

A life-cycle comparison between inorganic and biological catalysis for the production of biodiesel

Life cycle assessment (LCA) has been used to compare inorganic and biological catalysis for the production of biodiesel by transesterification. The inorganic route, using catalysis by sodium hydroxide, has been compared with a conceptual biological one using enzymatic catalysis by the lipase produced by Candida antarctica. Although biological catalysis has not been used for industrial production of biodiesel to date, results from laboratory experiments suggest that it could have distinct advantages over the inorganic route, particularly with regard to a simplified flowsheet for purification and concomitant energy savings. Five flowsheet options have been included in the study to investigate the alkali and enzyme catalysed production routes from rapeseed oil, use of methanol or ethanol for transesterification and the effect of efficiency of alcohol recovery. The LCA shows that the enzymatic production route is environmentally more favourable. Improvements are seen in all impact categories. Global warming, acidification, and photochemical oxidation are reduced by 5%. Certain toxicity levels have more than halved. These results are mainly due to lower steam requirements for heating in the biological process.     

A guide for compiling inventories in hybrid life-cycle assessments: some Australian results

Hybrid life-cycle assessment employing input–output analysis has advantages over conventional methods. In the inventory phase of a hybrid assessment, the data collection and the boundary selection can be tailored by using structural path analysis. This technique was applied to recent Australian data in order to determine environmentally important input paths in terms of energy consumption, land disturbance, water use, and emissions of greenhouse gases, NO_x, and SO₂, for all Australian industry sectors. Due to the complexity of inter-industrial transactions, up to third-order paths can be top-ranking. The identification of such paths is considerably more labour-intensive in conventional life-cycle assessments.     

Positive and negative feedback in consequential life-cycle assessment

In this paper we develop a typology of consequences that can be used for environmental assessments of investment in technologies. As an illustration we estimate how the inclusion of different cause–effect chains could affect the estimated greenhouse gas emissions resulting from buying and using a fuel cell bus today. In contrast to earlier studies, we include cause–effect chains containing positive feedback from adoption (e.g. economies of scale and learning). We discuss how our findings affect the usefulness and limitations of consequential life-cycle assessment (LCA) and how LCA methodology in more general can be used to support strategic technology choice. A major conclusion is that environmental assessments of investment in emerging technologies should not only include effects resulting from marginal change of the current system but also marginal contributions to radical system change.     

Identification of key issues for further investigation in improving the reliability of life-cycle assessments

The interative nature of life-cycle assessment (LCA) means that more details are looked for until a certain level of reliability has been achieved. This paper is concerned with the identification of key issues for further investigation in such an iterative procedure. Key issues in this context are defined as those aspects of an LCA which need more detailed research to arrive at a solid conclusion. The main concept in the context of finding key issues is the study of the propagation of uncertainties in underlying data. The structured procedure of LCA can be described in mathematical terms, so that standard mathematical techniques for the study of the propagation of uncertainties can be employed. The influence of uncertainties in input data on uncertainties in output data can be calculated, and the main source of the resulting uncertainties can be identified. The result of the analysis is a list of prioritized key issues for more detailed research and more accurate data.     

Solid waste treatment within the framework of life-cycle assessment

Traditionally, treatment of solid waste has been given limited attention in connection with life-cycle assessments (LCAs). Often, only the amounts of solid wastes have been noted. This is unsatisfactory since treatment of solid waste, e.g. by landfilling or incineration, is an operation, requiring inputs and producing outputs, which should be described in the inventory of an LCA, in parallel to other operations. However, there are difficulties in describing emissions from solid waste treatments and there is a need for development of such methods. In this paper an approach for describing emissions from incineration and landfilling is outlined. Methodological questions concerning the time-frame and allocation principles are discussed. Methods for estimating potential emissions from landfilling of municipal solid waste and industrial wastes are suggested. The methods are used for calculating potential emissions from landfilling of some typical wastes. These emissions are compared with the emissions from other stages in the life cycle for some materials and wastes. it is shown that the potential emissions from landfilling are, for some products, of importance for the final results. Hence, if emissions from landfilling are neglected, or underestimated, results and conclusions in an LCA may be misleading.     

面向经济回收的产品设计系统构成

面向回收的产品设计能够使废旧产品得到更好的回收和重用，优化拆卸序列的生成必须基于产品拆卸的经济性分析。论述了面向经济回收的产品设计系统的构成及相关的关键问题，分析了产品的零件材料回收价值与拆卸工艺，建立了零件材料合理回收的评估方法。     

Standardized and simplified life-cycle assessment (LCA) as a driver for more sustainable biofuels

The assessment of environmental impacts along the life cycle of biofuels is a complex and resource-demanding task that cannot be afforded by small producers in developing countries. Therefore, certification schemes bear the risk that small and independent producers will be locked out and the market for sustainable biofuels will be dominated by international investors and large-scale plantations. However, many environmental impacts of various production chains of biofuels and feedstocks are already known. This knowledge has been used to create a web-based questionnaire for a “Sustainability Quick Check for Biofuels” (SQCB, http://www.sqcb.org). SQCB reduces the need for user entries to the most relevant and best-known parameters of the biofuel production chain. Based on this user input, a specific inventory is automatically modelled and linked to background data. SQCB then calculates the environmental impact assessment and checks the results against sustainability criteria. Since the results are calculated immediately, key environmental factors can be interactively analyzed. One major goal of the SQCB is to support the market entrance for local biofuel producers, given that strengthening local stakeholders is a key driver for empowering rural communities in development countries.     

Aftermarket remanufacturing strategic planning decision-making framework: theory & practice

The authors of this paper offer an aftermarket, remanufacturing (or reman) decision-making framework (RDMF), developed, based on a comprehensive set of strategic factors (Subramoniam et al., 2009a) derived from an in-depth literature review and case studies. RDMF is also grounded on results from an industry survey and related theory. The survey targeted Original Equipment (OE) suppliers that are involved in automotive OE production and also provide remanufactured (or reman) parts for the aftermarket, which includes the Original Equipment Service (OES) and/or the Independent Aftermarket (IAM) business. A response rate of 42% was obtained for the survey; the respondents were business unit managers or chief engineers from 18 companies in the United States and Europe who are actively involved in the reman businesses. The survey results helped the authors of this paper to prioritize and confirm the strategic decision-making factors from previous research. The key factors considered to be important by more than 50% of the survey respondents, constituting roughly 79% of the strategic factors were then incorporated into RDMF. The RDMF will be useful for aftermarket supplier companies in general and in particular, will be useful for automotive suppliers, involved with OE and aftermarket production.