Publicação
Primary Energy Factors and Specific Emissions for the Portuguese Network
| Resumo: | In the context of the world we live in today, where climate change is a problem, and being directly related to CO2 emissions, it is important, especially for Portugal, to change the paradigm of many years of using fossil fuels (these also related to emissions to the atmosphere). There are plenty of options for renewable energy sources in this country, and some data say that renewable energy production has already surpassed fossil fuel production.Conversion factors for primary energy and specific greenhouse gas emissions are based on average values despite the primary energy and vary strongly with the seasons and the time of day due to the renewable generation. Additionally, in most countries, these are out of date. due to the recent evolution of the generation mix. Recent studies have been analyzing and proposing different methodologies in order to determine primary energy factors. It is thus intended, in this study, to determine based on some of these methodologies, and taking based on data from the Portuguese power grid in recent years, the primary energy factors and specific CO2 emissions from the Portuguese electricity network. It is also intended to analyze its variation throughout the year (month and seasons) and the time of the day.Through the study and the applications made in this dissertation it was possible to verify what was previously said, and, in fact, the PEF value, besides being outdated, is decontextualized, as this value varies with the seasons of the year and also with the contribution and production through renewable sources, which, as also been verified, is directly related to this value. With the methods used a value of 1.87 was obtained based on the last years, and since the value that is used today is 2.5 it can be noticed that many other factors that depend on PEF are wrong. Another factor calculated here was that of CO2 emissions, which is once again directly related to PEF since with the increase in emissions there is a higher PEF, thus indications of strong production in fossil fuels. Therefore, based on this work, it can be stated that the value of the primary energy factor has to be constantly monitored in order to be able to make correct predictions as well as not to induce other calculations, such as product efficiency, in error |
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| Autores principais: | Gonçalves, Maurício Amorim Aleixo |
| Assunto: | Energia primária Fator de Energia Primária Emissões de CO2 Fator de Emissão Fontes de Energia Renovável Primary Energy Primary Energy Factor CO2 Emissions Emission Factor Renewable Energy Source |
| Ano: | 2019 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Coimbra |
| Idioma: | inglês |
| Origem: | Estudo Geral - Universidade de Coimbra |
| Resumo: | In the context of the world we live in today, where climate change is a problem, and being directly related to CO2 emissions, it is important, especially for Portugal, to change the paradigm of many years of using fossil fuels (these also related to emissions to the atmosphere). There are plenty of options for renewable energy sources in this country, and some data say that renewable energy production has already surpassed fossil fuel production.Conversion factors for primary energy and specific greenhouse gas emissions are based on average values despite the primary energy and vary strongly with the seasons and the time of day due to the renewable generation. Additionally, in most countries, these are out of date. due to the recent evolution of the generation mix. Recent studies have been analyzing and proposing different methodologies in order to determine primary energy factors. It is thus intended, in this study, to determine based on some of these methodologies, and taking based on data from the Portuguese power grid in recent years, the primary energy factors and specific CO2 emissions from the Portuguese electricity network. It is also intended to analyze its variation throughout the year (month and seasons) and the time of the day.Through the study and the applications made in this dissertation it was possible to verify what was previously said, and, in fact, the PEF value, besides being outdated, is decontextualized, as this value varies with the seasons of the year and also with the contribution and production through renewable sources, which, as also been verified, is directly related to this value. With the methods used a value of 1.87 was obtained based on the last years, and since the value that is used today is 2.5 it can be noticed that many other factors that depend on PEF are wrong. Another factor calculated here was that of CO2 emissions, which is once again directly related to PEF since with the increase in emissions there is a higher PEF, thus indications of strong production in fossil fuels. Therefore, based on this work, it can be stated that the value of the primary energy factor has to be constantly monitored in order to be able to make correct predictions as well as not to induce other calculations, such as product efficiency, in error |
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