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- Macro modeling of electricity price towards SDG7Publication . Martins, Florinda; Felgueiras, Carlos; Caetano, NídiaEnergy challenges are crucial issues to achieve Sustainable Development and its goals. Energy availability and affordability are pillars for ending poverty, giving access to commodities as well as water, etc. Modern lives rely on appliances and gadgets based on electric energy being its price a key issue making it worth to analyze and promote simple models able to predict electric energy prices to support in decision-making processes and in management. This work studied the correlation of electricity price with variables such as the electricity mix, GDP (gross domestic product), energy productivity, electricity consumption per capita, fossil fuel reserves, and diesel price, using Spearman correlation. To the significant correlations found it was then applied the Kruskal–Wallis test and the variables that presented statistically significant differences were then considered to model electricity price based on these macro variables. Our findings revealed that the best models were a logarithmic and a linear model of energy productivity to predict electricity price, which is fundamental to achieve Sustainable Development Goals (SDG), specifically SDG7. In the validation process, these models presented an average deviation of 10.3% and 11.7%, respectively, which is reasonable considering the simplicity of the models developed.
- Renewable Energy Support Mechanisms – Present StatusPublication . Martins, Florinda; Felgueiras, Carlos; Smitková, M.Renewable energy production is important to solve problems related to security of supply, economic competitiveness, reduction of the economic energy burden to citizens and environmental impacts such as CO2 emissions and pollution. Besides this the scenarios for the future foresee an increase in energy demand mainly due emerging economies and by this reason all the above mentioned issues will be crucial for EU Member States and many other countries around the world. Due to the inability of market to move to more sustainable energy systems, using a higher share of energy from renewable energy sources, it was necessary public action, creating RES support mechanisms in the majority of countries.
- ICEER2018@Prague: researching towards a sustainable futurePublication . Caetano, Nídia; Felgueiras, CarlosThe 5th edition of the International Conference on Energy and Environment Research, ICEER 2018, took place in the end of July. The maturity of this conference series has now been reached, with a large number of participants from academia, as well as a few coming from the professional field. Linking together energy and environment research is not an easy task. However, it is now understood that these fields are interconnected and that the answer to the challenge of a sustainable future depend enormously on the willingness and capability of problem thinking in an integrated manner. This paper presents a brief summary of the participants in ICEER 2018 contribution towards sustainability, through energy and environment research.
- Book of abstracts of ICEER2019: The 6th International Conference on Energy and Environment Research: Energy and Environment: Challenges towards circular economyPublication . Caetano, Nídia de Sá; Borrego, Carlos; Nunes, Maria Isabel da Silva; Felgueiras, CarlosThe 6th edition of the International Conference on Energy and Environment Research, ICEER 2019, took place in the end of July 2019, at the University of Aveiro, Portugal. With most of the participants coming from academia, and a few from the professional field, ICEER series is still growing and attracting increased interest. Energy production, distribution and use are fundamental for the Sustainable Development of nations, showing a clear link between the energy and environment issues. Nevertheless, these matters are frequently dealt with separately, reflecting the way they are taught, and causing strong negative impacts, and hindering progress. With a growing trend in circular economy models applied to common goods production and commercialization, ICEER 2019 had as focus theme the challenges posed by energy and environment research in a circular economy-based model.
- Macro Modelling of Electricity Price Towards Sdg7Publication . Martins, Florinda; Felgueiras, Carlos; Caetano, NídiaEnergy challenges are crucial issues to achieve Sustainable Development and its goals. Energy availability and affordability are pillars for ending poverty, giving access to commodities as well as water, etc. Modern lives rely on appliances and gadgets based on electric energy being its price a key issue making it worth to analyze and promote simple models able to predict electric energy prices to support in decision-making processes and in management. This work studied the correlation of electricity price with variables such as the electricity mix , GDP, energy productivity, electricity consumption per capita, fossil fuel reserves, and diesel price, using Spearman correlation. To the significant correlations found it was then applied the Kruskal-Wallis test and the variables that presented statistically significant differences were then considered to model electricity price based on these macro variables. Our findings revealed that the best models were a logarithmic and a linear model of energy productivity to predict electricity price. In the validation process, these models presented an average deviation of 10.3% and 11.7%, respectively, which is reasonable considering the simplicity of the models developed.
- RES Efficiency Indicators for Portugal, Slovakia and Czech RepublicPublication . Smitková, M.; Felgueiras, Carlos; Martins, F.
- Indicators Used in the Energy SectorPublication . Martins, Florinda; Felgueiras, CarlosWorld energy mix still depends heavily on fossil fuels but the foreseen increase demand, the scarcity of those resources, their unevenly distribution as well as other factors such as economic burdens due to fossil fuel prices and climate change concerns contributed to the establishment and implementation of new policies in the energy sector. Renewable energy sources are being promoted worldwide as a pathway to reduce external energy dependency, moving towards lower carbon energy systems. It is important to policy makers, investors and other stakeholders to have tools for deciding which policies, investments and measures should be implemented in the future. Thus indicators play very important role for fulfilling that task. This work present a structured presentation of several indicators commonly used to compare solutions in the energy domain.
- The Circular Economy as a promoter of sustainabilityPublication . Martins, Nelson; Afgan, Naim; Borrego, Carlos; Ferreira Dias, Marta; Nunes, Maria Isabel; Felgueiras, Carlos; Caetano, Nídia(Excerpt) A circular economy encourages sustainability and competitiveness in the long term. The recognized scarcity of key natural resources and the growing volume of industrial and urban waste are the basis of the recognition that a circular economy approach is the pathway for sustainable development. On 4th March 2019, the European Commission adopted a comprehensive report on the implementation of a Circular Economy Action Plan. The report presents the main achievements under the Action Plan and sketches out future challenges to shaping our economy and paving the way towards a climate-neutral, circular economy where pressure on natural and freshwater resources as well as ecosystems is minimized. This special issue of Sustainability, with the theme “The Circular Economy as a Promoter of Sustainability”, aims to publish research or review articles dealing with the topics related with (i) sustainable development strategies based on the circular economy concept, (ii) exploring the role and progress of production and consumption to waste management, including energy, (iii) market for secondary raw materials, (iv) closed loop product lifecycles, (v) recycling and re-use, and (vi) support consumers choosing sustainable products and services. (...)
- Macro Modelling of Electricity Price Towards SDG7Publication . Martins, Florinda; Felgueiras, Carlos; Caetano, NídiaEnergy is a very important issue to achieve Sustainable Development. Energy availability and affordability are key aspects for ending poverty and giving access to base commodities. In addition our daily lifes rely on electric appliances and gadgets to perform inumerous tasks so electricity price is a crucial issue due to its economic, environmental and social impacts. In this work it was studied the correlation of electricity price with the electricity mix from the several sources, GDP, energy productivity, electricity consumption per capita, fossil fuel reserves, and diesel price using Spearman correlation. The Kruskal-Wallis test was then applied considering the significant correlations and the macro variables that presented statistically significant differences were used to model electricity price. The logarithmic and linear model based on energy productivity to predict electricity price were the best models. The models were applied to the data and the average deviation was 10.3% and 11.7% which is satisfactory. Millions of people in the World are affected by electricity price and it is important to have models to predict electricity price to help in the decision-making process and in management.