Islands

In this chapter, the author explores favorable features of the “hub” concept for islands, including the ability to exploit the meaning of “circular energy resource hubs” approach, where the term “hub” as indicated in literature means the use of multiple energy carriers as interfaces between energy producers, consumers, and transport infrastructure. The author expands the idea to “circular energy resource hubs” by integrating circular economy principles in which we keep resources in use for as long as possible, extract the maximum value from them while in use, then recover and regenerate products and materials at the end of each service life. It demonstrates some interesting advantages in terms of applicability of the concept offered by new theoretical approach. Furthermore, circular energy resource hubs could serve as interfaces between infrastructures and network participants (producers, consumers) or between different infrastructures, representing a generalization or extension of a network node.

2018 ◽  
Vol 174 ◽  
pp. 01006 ◽  
Author(s):  
Břetislav Teplý ◽  
Tomáš Vymazal ◽  
Pavla Rovnaníková

Efficient sustainability management requires the use of tools which allow material, technological and construction variants to be quantified, measured or compared. These tools can be used as a powerful marketing aid and as support for the transition to “circular economy”. Life Cycle Assessment (LCA) procedures are also used, aside from other approaches. LCA is a method that evaluates the life cycle of a structure from the point of view of its impact on the environment. Consideration is given also to energy and raw material costs, as well as to environmental impact throughout the life cycle - e.g. due to emissions. The paper focuses on the quantification of sustainability connected with the use of various types of concrete with regard to their resistance to degradation. Sustainability coefficients are determined using information regarding service life and "eco-costs". The aim is to propose a suitable methodology which can simplify decision-making in the design and choice of concrete mixes from a wider perspective, i.e. not only with regard to load-bearing capacity or durability.


Author(s):  
Mark Treacy ◽  
Danilo Della Ca' ◽  
Niculin Meng

<p>Making the transition to ultra-long bridge design life requires a paradigm shift in the way bridge maintenance is considered. In order to achieve a very long service life, the maintenance program must be carefully planned and strictly executed throughout the structure’s life. A bridge’s bearings and expansion joints experience the full effects of traffic and the environment throughout that service life, and can act as ideal “smart” components</p><p>– incorporating integrated sensors in order to continuously monitor the components’ own performance, and the structure’s overall performance, over time. Installation and testing of such sensors in factory conditions allows very high quality control, which cannot easily be matched on site. So-called “wear elements”, such as the sliding surface materials in bearings and expansion joints, will need to be replaced a number of times during a long service life, even when using the highest-quality materials available. Recognizing this fact, and incorporating monitoring systems that can track the deterioration of such elements and provide advance warnings for the owner, can result in efficient life-cycle planning of bridge maintenance, vital for major transport infrastructure. Recent developments and added value of such “smart” technologies are discussed.</p>


2021 ◽  
Vol 65 (6) ◽  
pp. 79-85
Author(s):  
E. Telegina

Received 13.01.2021. The coronavirus pandemic has accelerated global economic, technological and social transformation, including the energy sector, and has given the impetus to energy transition from organic fuels to clean energy sources. Though oil will remain an important energy resource in the global energy balance, in the long run renewables will become the leading energy. The European Union and China are the leaders in implementation of energy transition strategies from fossil to clean energy. The transformation in the energy market has affected dramatically the relations between producers and consumers, who now actively determine the consumption trends (for example, green energy, electric vehicles, etc.). Distributed generation and blockchain in power industry enable the consumers to play an active part in the electricity production and distribution chains. Digital transformation and climate agenda are changing the structure of energy business from vertically integrated companies to knowledge-intensive networks. Investors almost unanimously vote for renewable energy. The largest oil and gas companies change their long-term strategies and transform into energy holdings with the prevailing share of renewables in the business structure. Hydrogen attracts particular attention as a promising energy source. The EU plans to develop hydrogen transport infrastructure. For its part, Russia has the ability to supply hydrogen to the European market through the existing gas pipelines. Coronacrisis accelerated the development of online services, artificial intelligence, and distant work. Education and telemedicine received a powerful impetus for further development. Еducation becomes continuous process in the digital world. New educational ecosystems in which skills and competencies are worked out on an interdisciplinary basis are formed. Digital transformation meets the expectations of the generation Z, which in the coming decades will become economically active and will dominate in social and economic agenda. Digitalization, adaptive nature-like technologies, environmentally friendly energy resources, flexible horizontal network between market participants are already a post-COVID reality.


Author(s):  
Qing Huang ◽  
Jiang Liu ◽  
Liang Feng ◽  
Qi Wang ◽  
Wei Guan ◽  
...  

Abstract Photocatalytic CO2 reduction into energy carriers is of utmost importance due to the rising concentrations of carbon dioxide and the depleting energy resource. However, the highly selective generation of desirable hydrocarbon fuel, such as methane (CH4), from CO2 remains extremely challenging. Herein, we present two stable polyoxometalate-grafted metalloporphyrin coordination frameworks (POMCFs), which are constructed with reductive Zn-ε-Keggin clusters and photosensitive TCPP linkers, exhibiting high selectivity (> 96%) for CH4 formation in photocatalytic CO2 reduction system. To our knowledge, the high CH4 selectivity of POMCFs has surpassed all of the reported coordiantion framework-based heterogeneous photocatalysts for CO2-to-CH4 conversion. Significantly, the introduction of Zn-ε-keggin cluster with strong reducing ability is the important origin for POMCFs to obtain high photocatalytic selectivity for CH4 formation, considering that eight MoV atoms can theoretically donate eight electrons to fulfill the multi-electrons reduction process of CO2 to CH4 transformation.


2021 ◽  
Vol 255 ◽  
pp. 01038
Author(s):  
Iryna Reshetnikova ◽  
Viktoriia Apalkova ◽  
Iryna Lytovchenko ◽  
Jan W. Wiktor

The article focuses on the problem of evaluation of new markets in a circular economy, substantiating the need to assess not only economic performance, but also green utility in the process of making managerial decisions. The article proposes an algorithm for calculating the complex Index of Economic and Green Market Utility (IEGMU) for the region in the field of car sharing. It covers such indicators as market capacity and dynamics, the level of impact on the traditional automotive sector, as well as the green effect, which includes the reduction of carbon dioxide emissions, product (vehicle) consumption, and pressure on transport infrastructure. The advantage of the proposed algorithm is the possibility of using matrix analysis to determine the stage of development of each market. As an approbation, the article presents the calculation of the index for such regions as North America, Europe and Asia.


2020 ◽  
Vol 9 (3) ◽  
pp. 38
Author(s):  
Haradhan Kumar Mohajan

Since start of the Industrial Revolution about 260 years ago, the negative effects from the traditional linear economy (LE) become threat to the stability of the economies and natural ecosystems. Strength of climate change, reduction of environment pollution and integrity of ecosystems are essential issues for survival of the global humanity. According to LE resources for production are easily available and unlimited, and after use wastes are disposable. The circular economy (CE) is an alternative to the LE where the resources may be used for as long as possible. It tries to capture the value of existing products and materials, and decreases the use of primary materials in industries. The CE is a part of environmental economics and beneficial to the society. It keeps products, components, and materials at their highest utility and maximum value at all times. At present CE is one of the most focused terms among environmental economic scientists. The aim of this study is the implementation of the sustainable development strategies and the transition from LE towards CE.


2020 ◽  
Vol 11 (7) ◽  
pp. 1129-1158 ◽  
Author(s):  
Sabina Scarpellini ◽  
Luz María Marín-Vinuesa ◽  
Alfonso Aranda-Usón ◽  
Pilar Portillo-Tarragona

Purpose This paper aims to define and measure the environmental capabilities that are applied when the circular economy (CE) is introduced in businesses. Founded on the dynamic capabilities theoretical approach, the study analyzes different environmental competences that firms apply during this process. Environmental management systems, corporate social responsibility, reporting and accountability and other environmental accounting practices are studied in the same analytical framework used to study the environmental capabilities that influence the circular scope (CS) of firms. This study contributes to bridging the gap between academic research focused on environmental accounting and that investigating the introduction of the CE in businesses. Design/methodology/approach The results were obtained by using partial least squares structural equation modeling to analyze the relationship between environmental capabilities for the CE and the CS achieved by a sample of Spanish firms with more than 50 employees that expressed interest in the CE, eco-design, eco-innovation and other environmental issues. Findings Based on an analysis using the dynamic capabilities theoretical approach, the results suggest a positive relationship between the CS of firms, their environmental accounting practices and their level of corporate social responsibility (CSR) and accountability. Stakeholders’ pressure – which has a mediating effect on the CS of firms – is also analyzed, adding new insights to recent studies of this topic at the micro-level. The authors also explore whether the CS of businesses, which is related to the degree of their development of capabilities, influences environmental and financial performance. Practical implications The new insights obtained in this study can help overcome the limitations of conventional accounting approaches and incorporates a much broader scale of environmental information that can be applied to CE practices. These results also offer insights to practitioners regarding the internal measurement processes related to the CE and regarding CSR in particular for small and medium enterprises, because these metrics can be partially applied depending on the practices introduced in each firm. For policymakers, a better understanding of the CE’s introduction into businesses will contribute to the design of policies that can enhance its deployment, for example, by providing tools that set up regional priorities depending on the CE-related practices adopted by the firms located in the territory. Social implications A CE involves the transformation of a linear economic model into a circular one to reduce dependence on raw materials and energy and to reduce the environmental impact of production and consumption. Understanding how to manage the specific competences that integrate capabilities applied to the CE will allow firms to improve their social and environmental reporting. In addition, other social implications of this study relate to improving relationships with consumers and stakeholders and to the practice of social corporate sustainability. Originality/value This study goes beyond previous research on the CE to extend the authors’ knowledge about its adoption at the micro-level by taking a transversal approach, as its subject spans the fields of environmental accounting and the CE while addressing both in a framework of analysis. The analysis of the accounting concerns of the CE in businesses and the study of concerns related to endogenous environmental competences are quite original under the theoretical framework of dynamic capabilities, and this study is a first step in an incipient line of inquiry.


Author(s):  
Valeria Cascione ◽  
Matt Roberts ◽  
Stephen Allen ◽  
Barrie Dams ◽  
Daniel Maskell ◽  
...  

The construction sector is a large consumer of non-renewable resources and it is responsible of 44% of global energy related CO2 emissions. Circular economy is an emerging strategy that has potential to make significant improvements in the construction industry, by taking efficient and sustainable actions against climate change. The principles of circular economy are to minimise the waste of resources, by maximizing materials' performances, whilst in use, and recycle and regenerate them at the end of their service life. Natural materials can potentially be suitable in this strategy, due to the use of renewable resources, carbon sequestration potential, and high suitability for reuse and recycling. The development of bio-based wall panel is a first step into the integration of a circular economy approach in the construction sector. In this study, vapour responsive bio-based panel prototypes with low thermal transmittance (U<0.20 W/m2K) are being designed, taking into consideration the burdens and benefits of natural materials over their entire life cycle. The challenge is to assess the environmental impact of the panels during their design and production, maximise performance and life span, when in use, and regenerate and recycle panel components at the end of the service life. In this paper, a life cycle assessment of a prototype bio-based panel designed with circular economy principles is investigated. The environmental impact of the panel is analysed to investigate limitation in assessing emissions and use of resources in a circular prospective. The objective of the research is to integrate environmental impact analysis during the early stage of panel design. This will put the basis for the development of a sustainable and circular building industry and for identifying area of improvements for the development of sustainable circular panels with expected hygrothermal benefits conferred using bio-based materials.


2019 ◽  
Vol 46 (11) ◽  
pp. 1074-1079 ◽  
Author(s):  
Kathryn Bourke ◽  
Brian Kyle

This paper introduces some challenges involved in assessment of service life and durability in the context of circular economy principles. It proposes a possible agenda for service life planning in a resource-constrained economy. Aspects considered include the reuse of materials and components over multiple life cycles within built assets. The interface between life cycle assessment and costing techniques, service life planning, and resilience against changing climate and performance requirements is considered. The current codes and standards, in particular within ISO 15686 series on service life, CEN 15643 on integrated sustainability assessment, and ISO 20887 on design for disassembly, are briefly described together with some implicit challenges. The contributions of CIB Task Groups are also considered, in particular CIB Task Groups 16, 39, and 115 and CIB W80 on prediction of service life of building materials methodologies. Several current EU research and development projects are briefly mentioned, in particular BAMB (Buildings as Material Banks).


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