• Energy Research
• other engineering and technologies close
• 11. Sustainability close
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Abstract This study demonstrates the possibility to use energy-cost optimal building designs based on life cycle approach. There is a lack of studies that cover the comprehensive assessment of both embodied energy (EE) and operational energy (OE) in a single optimization problem. The primary goal of the current study is to compare the optimized results of using OE+EE together and OE only. The optimization is performed on a case study building (townhouse) in Finland with three structural alternatives (i.e., reinforced concrete (RC); cross-laminated timber (CLT) and Steel). Different options for insulation thickness of external wall, roof, floor and window types were considered as decision variables as the scope of the present study is on building envelope. The objectives of the optimization are to minimize life cycle energy (LCE) and life cycle costs (LCC). The LCE difference between the most and least energy efficient solution on the pareto front is greater in case of the OE optimization, compared to OE+EE optimization. For all studied structures, the EE of the optimal solutions from OE+EE optimization ranges 16%–23% of LCE. Many of the non-dominated optimal solutions obtained from the OE+EE optimization shows a higher U-value for the building envelope components compared to the optimal solutions from the OE optimization. A relationship between both OE and EE with the overall thermal resistance of the building envelope is discussed to obtain a deeper understanding of such differences in U-value for the optimal solutions obtained from the OE+EE and OE optimization.

One of the biggest challenges in forestry research is the effective and accurate measuring and monitoring of forest variables, as the exploitation potential of forest inventory products largely depends on the accuracy of estimates and on the cost of data collection. This paper presented a novel computational method of low-cost forest inventory using global navigation satellite system (GNSS) signals in a crowdsourcing approach. Statistical features of GNSS signals were extracted from widely available GNSS devices and were used for predicting forest attributes, including tree height, diameter at breast height, basal area, stem volume, and above-ground biomass, in boreal forest conditions. The basic evidence of the predictions is the physical correlations between forest variables and the responses of GNSS signals penetrating through the forest. The random forest algorithm was applied to the predictions. GNSS-derived prediction accuracies were comparable with those of the most accurate 2-D remote sensing techniques, and the predictions can be improved further by integration with other publicly available data sources without additional cost. This type of crowdsourcing technique enables the collection of up-to-date forest data at low cost, and it significantly contributes to the development of new reference data collection techniques for forest inventory. Currently, field reference can account for half of the total costs of forest inventory.

Reduction of greenhouse gas emissions and mitigation of climate change are the main aims of the global climate policy. Increased use of renewable energy is a central measure in achieving these goals. However, mitigation of climate change through increased use of renewable energy also has negative environmental impacts. Focusing merely on greenhouse gas emissions may lead to overseeing these other negative environmental impacts and thereby in unwanted side-effects. The aim of this review was to assess the overall life cycle impacts related to the production and use of the different renewable energy sources. Impacts were assessed for unit processes and for the Finnish national renewable energy targets as a whole. The review points out that in order to comprehensively understand the overall environmental impacts of the different renewable energy sources, a thorough life cycle assessment with a unified framework would be needed. Presently there is only limited information available or the published results are not comparable with each another. However, assessment using the Finnish National Renewable Energy Targets for 2020 also indicates that under the present targets, the overall environmental impacts of the renewable energy use are likely to be low. Main impacts or risks of impacts relate to the use of forest energy.

During urban planning, city planners and municipal authorities make various choices that impact districts' energy efficiency and emissions significantly. However, they often lack information about the actual effects of the design options. This paper describes a methodology, embedded to a tool called Kurke, that aims to support the planning of sustainable and energy efficient urban areas by analysing the energy performance of city plans and the impacts of their energy design alternatives on carbon dioxide emissions during planning. The methodology supports holistic energy analysis of urban areas, including energy demand of buildings and transport, and comparing 10 alternatives for local energy supply. The methodology is tested in two Finnish residential and mixed-use areas. The improved transportation plans can reduce CO2 emissions 10-20% compared to the business-as-usual design in case areas. CO2 emissions from buildings' heating can be reduced 18-24%. The total CO2 reduction potential of urban planning choices varies from 2% to 78% in case areas. This shows the significant role of urban planning in reducing CO2 emissions. Therefore, it is important that urban planners understand the impacts of the design decisions. Kurke tool offers such support with fast and practical evaluation of the planning options.

Abstract This study aims to identify and categorise the sustainability concerns raised in retail planning policy discourse, using empirical data from Finland. In order to identify the concerns, we conducted a critical discourse analysis of the policy discourse presented in media from 1990 to 2015. The analysis was conducted chronologically in order to understand the evolution of the sustainability concerns and the changes in the policy debate. To categorise the concerns identified from the discourse, we developed a holistic sustainability framework based on previous literature. Our findings show that during 1990′s the concerns were mostly socio-economic, however, due to enforcement of sustainable development policies, the share of environmental concerns raised significantly in 2000s. The findings of our study reveal the problematics of the retail planning policy making and call for a more holistic understanding of the multidimensionality of the sustainability impacts of retail planning.

In cities of the Global South, socio-technical heterogeneity in electricity provision is a reality that has partially shifted debates to the diversity of arrangements beyond the grid. Building on the case of Kingston in Jamaica, this article focuses on the relationship between the grid and such heterogeneous configurations and considers how heterogeneity transforms existing power relations. By analyzing the different strategies that actors (the government, the electricity provider, different types of consumers) have developed to address different challenges (energy transition, non-technical losses, affordability, etc.), the article shows how this heterogeneity entails a political process that reshapes possibilities and constraints for governing, and being governed by, the electricity grid. This analysis suggests taking solidarity as a central dimension when considering how to govern heterogeneous configurations, including the relationships between consumers, types of socio-technical systems and neighborhoods.

Abstract Local authorities need timely information on their greenhouse gas (GHG) emissions and their causes, comparison with other municipalities and tools for dissemination of information to the citizens. This paper presents a weekly GHG emission calculation system, CO 2 -report, which provides such data for citizens and local decision-makers in a timely manner, in contrast to the official emissions statistics, which are available on an annual basis 1–2 years afterwards. In this paper, we present the methodology and three main outputs of CO 2 -report: (1) weekly GHG emissions; (2) advance annual emissions; and (3) final annual emissions for 2009 with comparison of 64 municipalities in Finland. We explain the reasons for the large variability of annual emissions, from 5 to 13 t CO 2 -eq/capita, discuss the accuracy of advance and final emission estimates at local level, and show the weekly variability of emissions for three example municipalities with different emission profiles.

AbstractAmong scholars in sustainability science, there is an increasing recognition of the potential of place-based research in the context of transformative change towards sustainability. In this research, researchers may have a variety of roles; these are determined by the researcher’s engagement with the subject, the inherent theoretical, normative and methodological choices he or she makes, the researcher’s ambitions in contributing to change, and ethical issues. This article explores the varied roles of research fellows within the European Marie Curie ITN research program on sustainable place-shaping (SUSPLACE). By analysing 15 SUSPLACE projects and reflecting on the roles of researchers identified by Wittmayer and Schäpke (Sustain Sci 9(4):483–496, 2014) we describe how the fellows’ theoretical positionality, methods applied, and engagement in places led to different research roles. The methodology used for the paper is based on an interactive process, co-producing knowledge with Early Stage Researchers (fellows) of the SUSPLACE consortium. The results show a range of place meanings applied by the fellows. Varied methods are used to give voice to participants in research and to bring them together for joint reflection on values, networks and understandings, co-creating knowledge. Multiple conceptualisations of ‘sustainability’ were used, reflecting different normative viewpoints. These choices and viewpoints resulted in fellows each engaging in multiple roles, exploring various routes of sustainable place-shaping, and influencing place-relations. Based on our findings we introduce a framework for the ‘embodied researcher’: a researcher who is engaged in research with their ‘brain, heart, hands and feet’ and who integrates different roles during the research process.