Au cœur de cette thèse réside l'application des méthodes d'optimisation et d'études empiriques pour traiter des questions de développement durable dans le secteur de l'électricité du Vietnam pour les 30 prochaines années. On examine les moyens des options énergétiques durables pour le secteur de l'électricité. La thèse s'organise en deux parties. (i) Dans la première partie, nous développons le modèle " bottom-up " de planification intégrée des ressources (IRP) pour fournir une évaluation plus exhaustive de l'état actuel et des perspectives d'avenir pour le secteur de l'électricité du Vietnam dans les trois prochaines décennies. Puis, en utilisant une analyse comparative et une analyse de la vulnérabilité qui est basée sur la simulation IRP, nous analysons les vulnérabilités auxquelles le développement du secteur devra faire face, en termes de dimensions économiques et socio-environnementales. Nous avons en outre développé le modèle IRP, représentant les coûts marginaux de réduction des émissions de carbone de manière réaliste en tenant compte des valeurs non nulles de carbone et de limitation des émissions de carbone, afin de simuler des options d'approvisionnement énergétique soutenables pour le secteur de l'énergie. (ii) Dans la deuxième partie, nous étudions les principaux obstacles contre une adoption plus large des énergies soutenables à l'aide d'enquêtes formelles parmi les experts nationaux. Ensuite, nous utilisons une approche d'analyse empirique pour examiner les différents outils politiques appropriés, y compris des instruments d'incitation / régimes et la réforme du secteur pour une telle durabilité du secteur de l'énergie. Pour la fin, nous analysons l'accès aux sources de financement possibles pour le développement durable dans le secteur de l'électricité du Vietnam.

Transmits decision SS.VII/2 of UNEP Governing Council/Global Ministerial Environment. / UN Job no.: N0230044 E. Material type: Resolutions/decisions (UN). Issued under agenda item 1, agenda document A/CONF.199/PC/1.

Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro / Petróleo e gás natural são recursos naturais não renováveis que possuem grande participação na matriz energética mundial e tendência de crescimento na matriz nacional, cujo marco regulatório limita-se a definir critérios técnicos e procedimentais sem incorporar o modelo de sustentabilidade instituído pela Constituição Federal de 1988. A natureza finita dos recursos não renováveis, como o petróleo e o gás natural, exige uma visão do planejamento de sua exploração de longo prazo na definição dos objetivos e metas. Essa perspectiva de longo prazo traduz uma das preocupações do desenvolvimento sustentável: a garantia de direitos para as futuras gerações. Assim, ao procurar fornecer elementos para a tradução do modelo de desenvolvimento sustentável no arcabouço institucional e legal da indústria petrolífera vigente no Brasil, o presente trabalho busca contribuir para o aprimoramento da regulação petrolífera nacional e a qualidade de vida das gerações presentes e futuras. E, mais do que propor a elaboração de um projeto de lei, como modalidade de implantação de uma política pública, queremos contribuir para o fortalecimento das práticas e ações governamentais voltadas para a aplicação do desenvolvimento sustentável, consoante apregoa a Constituição Federal brasileira. Trata-se aqui de demonstrar, através de metodologia quali-quantitativa, a tese de que é possível incorporar o princípio constitucional de desenvolvimento sustentável na atividade de exploração e produção de petróleo e gás natural, formulando uma política pública que incorpore, no regime de propriedade do petróleo, a variável ambiental e o uso intergeracional que já haviam sido e continuam sendo aplicados a algumas fontes renováveis de energia. Inicialmente, identificamos a composição da matriz energética brasileira desde a inserção do petróleo como uma questão de Estado a partir dos anos 50 do século XX. Em seguida, analisamos a concepção legal e doutrinária para propor, então, a conceituação de um modelo de desenvolvimento energético sustentável, estruturante para a proposição de uma política nacional para a indústria petrolífera. Com base nessa conceituação, analisamos o marco regulatório e os procedimentos institucionais praticados atualmente para identificar as lacunas existentes no ordenamento a serem supridas pela política nacional proposta. A partir da análise dos contextos legal e institucional, e das políticas energética e ambiental, propomos a tradução de conceitos, objetivos, princípios e instrumentos num projeto de lei de Política Nacional de Uso Sustentável das Reservas de Petróleo e Gás Natural. Concluímos tecendo considerações gerais e específicas sobre a proposição aqui formulada com vistas ao aprimoramento do modelo nacional de gestão de recursos energéticos e ao fomento das discussões voltadas para a sustentabilidade das políticas públicas e as práticas privadas enraizadas na exploração irracional de recursos não renováveis / Petroleum and natural gas are non renewable natural resources that have a great participation in the global energy matrix and growth trend in the national matrix, whose regulatory framework is restricted to technical and procedural criteria without incorporating the model of sustainability established by the Federal Constitution of 1988. The finite nature of non-renewable resources, such as oil and natural gas, requires a vision of planning for their long-term exploration in the definition of goals and objectives. This long-term prospect represents one of the concerns of sustainable development that of guaranteeing the rights of future generations. So, when seeking to provide elements to translate of the model of sustainable development into the institutional and legal framework of the existing oil industry in Brazil it tries to contribute to the improvement of the national petroleum regulation and the quality of life for present and future generations. And more than proposing drawing up a bill, as a means of implementing a public policy, it aims to contribute to the strengthening of governmental actions and practices directed at implementing sustainable development, as proclaimed by the Brazilian Federal Constitution. Here it is a matter of demonstrating, through qualitative and quantitative methodology, the thesis that it is possible to incorporate the constitutional principle of sustainable development into the activity of exploration and production of oil and natural gas, formulating a public policy that incorporates, in the ownership of oil, the environmental variable and intergenerational use which had been and still are applied to some renewable sources of energy. Initially, we identified the composition of the Brazilian energy matrix since the inclusion of oil as a matter of state in the 1950s. Next, we analysed the legal and doctrinary concept and then proposed the concept of a model of sustainable energy development, a structuring element for the proposition of a national policy for the petroleum industry. Based on this concept, we analysed the regulatory framework and institutional procedures currently in force to identify the existing gaps in planning to be filled by the proposed national policy. Based on the analysis of the legal and institutional contexts, and energy and environmental policies, we propose the transformation of concepts, objectives, principles and instruments into a bill of law of National Policy on Sustainable Use of Reserves of Oil and Natural Gas. We conclude with general and specific considerations on the proposition made here with a view to improving the national model of management of energy resources and the fostering of discussions focused on the sustainability of public policies and private practices rooted in the irrational exploration of non-renewable resources.

Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro / Petróleo e gás natural são recursos naturais não renováveis que possuem grande participação na matriz energética mundial e tendência de crescimento na matriz nacional, cujo marco regulatório limita-se a definir critérios técnicos e procedimentais sem incorporar o modelo de sustentabilidade instituído pela Constituição Federal de 1988. A natureza finita dos recursos não renováveis, como o petróleo e o gás natural, exige uma visão do planejamento de sua exploração de longo prazo na definição dos objetivos e metas. Essa perspectiva de longo prazo traduz uma das preocupações do desenvolvimento sustentável: a garantia de direitos para as futuras gerações. Assim, ao procurar fornecer elementos para a tradução do modelo de desenvolvimento sustentável no arcabouço institucional e legal da indústria petrolífera vigente no Brasil, o presente trabalho busca contribuir para o aprimoramento da regulação petrolífera nacional e a qualidade de vida das gerações presentes e futuras. E, mais do que propor a elaboração de um projeto de lei, como modalidade de implantação de uma política pública, queremos contribuir para o fortalecimento das práticas e ações governamentais voltadas para a aplicação do desenvolvimento sustentável, consoante apregoa a Constituição Federal brasileira. Trata-se aqui de demonstrar, através de metodologia quali-quantitativa, a tese de que é possível incorporar o princípio constitucional de desenvolvimento sustentável na atividade de exploração e produção de petróleo e gás natural, formulando uma política pública que incorpore, no regime de propriedade do petróleo, a variável ambiental e o uso intergeracional que já haviam sido e continuam sendo aplicados a algumas fontes renováveis de energia. Inicialmente, identificamos a composição da matriz energética brasileira desde a inserção do petróleo como uma questão de Estado a partir dos anos 50 do século XX. Em seguida, analisamos a concepção legal e doutrinária para propor, então, a conceituação de um modelo de desenvolvimento energético sustentável, estruturante para a proposição de uma política nacional para a indústria petrolífera. Com base nessa conceituação, analisamos o marco regulatório e os procedimentos institucionais praticados atualmente para identificar as lacunas existentes no ordenamento a serem supridas pela política nacional proposta. A partir da análise dos contextos legal e institucional, e das políticas energética e ambiental, propomos a tradução de conceitos, objetivos, princípios e instrumentos num projeto de lei de Política Nacional de Uso Sustentável das Reservas de Petróleo e Gás Natural. Concluímos tecendo considerações gerais e específicas sobre a proposição aqui formulada com vistas ao aprimoramento do modelo nacional de gestão de recursos energéticos e ao fomento das discussões voltadas para a sustentabilidade das políticas públicas e as práticas privadas enraizadas na exploração irracional de recursos não renováveis / Petroleum and natural gas are non renewable natural resources that have a great participation in the global energy matrix and growth trend in the national matrix, whose regulatory framework is restricted to technical and procedural criteria without incorporating the model of sustainability established by the Federal Constitution of 1988. The finite nature of non-renewable resources, such as oil and natural gas, requires a vision of planning for their long-term exploration in the definition of goals and objectives. This long-term prospect represents one of the concerns of sustainable development that of guaranteeing the rights of future generations. So, when seeking to provide elements to translate of the model of sustainable development into the institutional and legal framework of the existing oil industry in Brazil it tries to contribute to the improvement of the national petroleum regulation and the quality of life for present and future generations. And more than proposing drawing up a bill, as a means of implementing a public policy, it aims to contribute to the strengthening of governmental actions and practices directed at implementing sustainable development, as proclaimed by the Brazilian Federal Constitution. Here it is a matter of demonstrating, through qualitative and quantitative methodology, the thesis that it is possible to incorporate the constitutional principle of sustainable development into the activity of exploration and production of oil and natural gas, formulating a public policy that incorporates, in the ownership of oil, the environmental variable and intergenerational use which had been and still are applied to some renewable sources of energy. Initially, we identified the composition of the Brazilian energy matrix since the inclusion of oil as a matter of state in the 1950s. Next, we analysed the legal and doctrinary concept and then proposed the concept of a model of sustainable energy development, a structuring element for the proposition of a national policy for the petroleum industry. Based on this concept, we analysed the regulatory framework and institutional procedures currently in force to identify the existing gaps in planning to be filled by the proposed national policy. Based on the analysis of the legal and institutional contexts, and energy and environmental policies, we propose the transformation of concepts, objectives, principles and instruments into a bill of law of National Policy on Sustainable Use of Reserves of Oil and Natural Gas. We conclude with general and specific considerations on the proposition made here with a view to improving the national model of management of energy resources and the fostering of discussions focused on the sustainability of public policies and private practices rooted in the irrational exploration of non-renewable resources.

No description available.

Le développement des énergies renouvelables, telles que le solaire photovoltaïque ou l’éolien, est fortement conditionné par la nature intermittente de ces sources d’énergie. Cette intermittence se traduit par un décalage entre pics de production et de consommation. Le stockage de l’énergie électrique revêt donc un caractère primordial dans la gestion de ce décalage. Pour accomplir cette tâche, la technologie lithium-ion est une bonne candidate parmi les technologies de stockage électrochimique de l’énergie. Mais les applications visées exigent des durées de vie bien supérieures à celles requises pour l’électronique portable ou pour les véhicules électriques. En effet les performances des batteries, notamment en termes de capacité, doivent être préservées pendant des durées de 15 à 20 ans. Cette thèse a alors pour but l’étude des mécanismes de vieillissement à long terme d’accumulateurs Li-ion composés d’oxydes lamellaires Li(NixMnyCo1 x y)O2 à l’électrode positive et de graphite à l’électrode négative, en se focalisant sur les interfaces électrode/électrolyte qui sont le lieu privilégié des mécanismes de vieillissement. Ce travail a été réalisé à l'aide de la spectroscopie photoélectronique à rayonnement X (XPS) et de la spectroscopie d’impédance électrochimique (EIS), deux techniques complémentaires particulièrement bien adaptées à l’étude des interfaces, l'une permettant de sonder les environnements chimiques en extrême surface, l'autre donnant la réponse d’un système à une sollicitation électrique sinusoïdale de fréquence variable. La contrainte importante induite par les durées de vie visées (20 ans) ont conduit à simuler le vieillissement à long terme des batteries en leur faisant subir des sollicitations électrochimiques beaucoup plus importantes que lors d’une utilisation normale Les caractérisations par XPS et EIS ont été systématiquement mises en relation avec l’évolution des performances électrochimiques des batteries considérées. Cette étude a permis d'apporter des améliorations aux batteries pour apporter une meilleure réponse à ces phénomènes de vieillissement en termes de maintien des performances: modification de la formulation des électrodes, des électrolytes, de la nature des matériaux actifs, etc. / Development of renewable energy sources such as photovoltaic or wind energy is limited by the intermittent nature of these energy sources. This intermittent nature results in the mismatch between production and consumption peaks. As a result, the storage of electrical energy plays an essential role to manage this mismatch. To this aim, lithium-ion technology appears as a good candidate among other ways of electrochemical storage of energy. However the targeted applications require much greater life span than those commonly admitted for portable electronics or electric vehicles. Battery performances, e.g. rechargeable capacity, should be preserved over 15 or 20 years. This PhD thesis aims at studying the long-term aging mechanisms of Li-ion batteries made up of lamellar oxides Li(NixMnyCo1 x y)O2 at the positive electrode and graphite at the negative electrode. We focused on the electrode/electrolyte interfaces which are the major place of aging processes. The work has been performed by X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS), two complementary techniques especially adapted to the study of interfaces, the former giving access to the chemical environments of atoms at the surface, the latter giving the answer of a system to a sinusoidal electric current with various frequencies. An important technical constraint was the difference between the targeted life span for the application (20 years) and the duration of the thesis (3 years). In order to simulate long-term aging the batteries were submitted to electrochemical stress in much harder conditions than in normal use. XPS and EIS characterizations were constantly related to evolution of electrochemical performances of batteries. This study allowed us during the duration of the project to bring improvements to batteries in order to obtain a better response to aging mechanisms regarding retention of electrochemical performances: e.g. change of electrodes or electrolyte formulation, change of active materials composition, etc.

PhD (Geography) / Department of Geography and Geo-Information Sciences / Improved access to modern affordable, sustainable and reliable energy supply is fundamental in the development of any economy and in the achievement of sustainable development goals. However, energy as a resource is increasingly and becoming scare in many countries and subsequently expensive, with a substantial impact on the socio-economic progress, especially in any country that lacks the financial, physical, social and human capital to secure its energy supply. Energy can also be produced though the anaerobic fermentation of biological waste, such as animal excrement, which is methane-rich. Fermentation also produces a nutrient-rich digestate. Biogas can be used for domestic purposes, such as cooking and heating. Furthermore, it can be converted into electricity. Biogas technology is of particular significance in rural households, where energy crisis are common. This thesis therefore aimed at developing an adoption and sustainable utilisation framework of biogas as an alternative source of energy for greenhouse gases emission reduction in the Limpopo Province. The sample involved 72 households with biogas digesters, which were purposively sampled and 128 households without digesters, which were randomly selected. The study was based on the primary data that were elicited using open and closed-ended questionnaires. Empirically, the results of this thesis developed a sustainable, simplified, appropriate and comprehensive framework for biogas adoption and utilisation, including an analysis of important factors that could influence the adoption of this desired technology, for cost-effectiveness and sustainability. / NRF

Der vorliegende 38. Band der Reihe 'Leipziger Beiträge zur Informatik' fasst die Ergebnisse der Fachtagung 'Betriebsführung und Instandhaltung regenerativer Energieanlagen (BIREA)' am 24. und 25. September 2012 in Leipzig zusammen. Die Fachtagung adressierte aktuelle Herausforderungen der Energiewirtschaft im Allgemeinen und der Branche der Erneuerbaren Energien im Speziellen. Der Anteil erneuerbarer Energien am Bruttostromverbrauch wird sich von derzeit ca. 17 % im Jahre 2020 auf 35% verdoppeln und langfristig bis auf 80% steigen. Mit der wachsenden Bedeutung steigen auch die Anforderungen an die regenerative Energiebranche. Dabei stehen im Vordergrund: a) die Versorgungssicherheit und Netzstabilität, b) sinkende Einspeisevergütungen, c) die Betriebsoptimierung regenerativer Energieanlagen, d) die effiziente Instandhaltung regenerativer Energieanlagen, e) die Vernetzung von Energieerzeugern und -verbrauchern zu virtuellen Kraftwerken, f) Verfügbarkeitsgarantien für Energieanlagen sowie Strom- und Ausfallprognosen. Die Fachtagung fokussierte folgende Themen des Betriebs und der Instandhaltung regenerativer Energieanlagen: a) neuartige Dienstleistungen (z. B. Wirkungsgradanalyse, Ertragsprognosen, Ausfallprognosen), b) Standardisierungsprozesse (z. B. RDS-PP, IEC 61850 / IEC 61400-25), c) die IKT-unterstützte Optimierung (z. B. Lebenslaufakte, Betriebsführung, Instandhaltungsplanung).

Tesis por compendio / [ES] Actualmente, los responsables de tomar decisiones contra el cambio climático carecen de herramientas para desarrollar inventarios de emisiones de gases de efecto invernadero (GEI) con suficiente rigor científico-técnico y precisión para priorizar e invertir los recursos disponibles de manera eficiente en las medidas necesarias para luchar contra el cambio climático. Por ello, en esta tesis se expone el desarrollo de un sistema de información territorial y sectorial (SITE) para monitorear las emisiones de GEI que sirva como herramienta de gobernanza climática local y regional. SITE combina las ventajas de los enfoques metodológicos descendente o top-down (de arriba hacia abajo) y ascendente o bottom-up (de abajo hacia arriba), para lograr un enfoque híbrido innovador para contabilizar y gestionar de manera eficiente las emisiones de GEI. Por tanto, en esta tesis se definen los diferentes desarrollos metodológicos, tanto generales como específicos de sectores clave del Panel Intergubernamental de Cambio Climático (IPPC) (edificación, transporte, sector forestal, etc.), un desarrollo informático para la parte de SITE que se ejecuta del lado del servidor, que de ahora en adelante denominaremos back-end del sistema, y siete implementaciones como casos de estudio representativos, a diferentes escalas y aplicados sobre diferentes sectores. Estas implementaciones a diferentes escalas y sectores demuestran el potencial del sistema como herramienta de apoyo en la toma de decisión contra el cambio climático a nivel regional y local. Las diferentes implementaciones en casos piloto representativos, tanto a nivel regional en la Comunitat Valenciana como a nivel local en municipios grandes (València) y medianos (Quart de Poblet y Llíria) muestran el potencial de adaptación territorial y sectorial que tiene la herramienta. Las metodologías desarrolladas para los sectores específicos de tráfico rodado, edificación o sector forestal, ofrecen cuantificaciones con una resolución espacial con gran capacidad de optimizar las políticas locales y regionales. Por tanto, la herramienta cuenta con un gran potencial de escalabilidad y gran capacidad de mejora continua mediante la inclusión de nuevos enfoques metodológicos, adaptación de las metodologías a la disponibilidad de datos, metodologías concretas para sectores clave y actualización a las mejores metodologías disponibles derivadas de actividades de investigación de la comunidad científica. / [CA] Actualment, els responsables de prendre decisions contra el canvi climàtic no tenen eines per aconseguir inventaris d'emissions de gasos d'efecte hivernacle (GEH) amb prou cientificotècnic rigor, precisió i integritat per invertir els recursos disponibles de manera eficient en les mesures necessàries contra el canvi climàtic. Per això, en aquesta tesis se exposa el desenvolupa un sistema d'informació territorial i sectorial (SITE) per monitoritzar les emissions de GEH com a eina de governança climàtica local i regional. Aquest sistema combina els avantatges dels enfocaments metodològics descendent o top-down (de dalt a baix) i ascendent o bottom-up (de baix a dalt), per aconseguir un enfocament híbrid innovador per comptabilitzar i gestionar de manera eficient les emissions de GEH. Per tant, en aquesta tesi doctoral es descriuen els diferents desenvolupaments metodològics, tant generals com específics de sectors clau del Panel Intergovernamental contra el Canvi Climàtic (edificació, transport, forestal, etc.), un desenvolupament informàtic per al back-end del sistema i set implementacions com a casos d'estudi representatius, a diferents escales, amb els diferents enfocaments metodològics i aplicats sobre diferents sectors. Això queda descrit en sis capítols. Aquestes implementacions a diferents escales i sectors demostren el potencial del sistema com a eina de suport en la presa de decisió contra el canvi climàtic a nivell regional i local. Les diferents implementacions en casos pilot representatius, tant a nivell regional a la Comunitat Valenciana com a nivell local en municipis grans (València) i mitjans (Quart de Poblet i Llíria,) mostren el potencial d'adaptació territorial i sectorial que té l'eina. Les metodologies desenvolupades per als sectors específics de trànsit rodat, edificació i forestal, ofereixen quantificacions amb una resolució espacial amb gran capacitat d'optimitzar les polítiques locals i regionals. Per tant, l'eina compta amb un gran potencial d'escalabilitat i gran capacitat de millora contínua mitjançant la inclusió de nous enfocaments metodològics, adaptació de les metodologies a la disponibilitat de dades, metodologies concretes per a sectors clau, i actualització a les millors metodologies disponibles derivades de activitats de investigació de la comunitat científica. / [EN] Currently, regional and local decision-makers lack of tools to achieve greenhouse gases (GHG) emissions inventories with enough rigor, accuracy and completeness in order to prioritize available resources efficiently against climate change. Thus, in this thesis the development of a territorial and sectoral information system (SITE) to monitor GHG emissions as a local and regional climate governance tool is exposed. This system combines the advantages of both, top-down and bottom-up approaches, to achieve an innovative hybrid approach to account and manage efficiently GHG emissions. Furthermore, this thesis defines the methodologies developed, a computer proposal for the back-end of the system and seven implementations as representative case studies at different scales (local and regional level), with the different methodological approaches and applied to different sectors. Thus, these implementations demonstrate the potential of the system as decision-making tool against climate change at the regional and local level as climate governance tool. The different implementations in representative pilot cases, both at the regional level in the Valencian Community and at the local level in large (Valencia) and medium-sized municipalities (Quart de Poblet and Llíria) demonstrate the potential for territorial and sectoral adaptation of the system developed. The methodologies developed for the specific sectors of road transport, building and forestry, offer quantifications with a spatial resolution with a great capacity to optimize local and regional policies. Therefore, the tool has a great potential for scalability and a great capacity for continuous improvement through the inclusion of new methodological approaches, adapting the methodologies to the availability of data, specific methodologies for key sectors, and updating to the best methodologies available in the scientific community. / Lorenzo Sáez, E. (2022). Desarrollo de una herramienta integral de gestión de gases de efecto invernadero para la toma de decisión contra el cambio climático a nivel regional y local en la Comunitat Valenciana [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/181662 / TESIS / Compendio

För att tillgodose framtidens växande behov av energi och samtidigt bidra till en långsiktigt hållbar energitillförsel krävs resurs- och energieffektivisering inom flera sektorer. Inte minst inom industrin som år 2016 stod för mer än 50 procent av det globala energibehovet. Tillvaratagandet av befintliga resurser såsom spillvärme från tryckluftsproduktion är en möjlig effektiviseringsåtgärd. Till grund för examensarbetet ligger ett önskemål från koncernen Sandvik AB att utreda besparingspotential och kostnader för reinvestering i en av industrins kompressorcentraler, Götvalsverket. Reinvesteringen avser två nya kompressorer vars spillvärme integreras i industrins befintliga närvärmesystem och möjliggör för minskade resurs- och energikostnader samt utsläpp av CO2. Arbetet syftar till att analysera olika kompressorlösningar utifrån ett ekonomiskt och miljömässig perspektiv. Detta görs med hjälp av insamlad data, känslighetsanalyser och lönsamhetskalkyler med tillhörande LCC. Målet är att kunna besvara olika frågeställningar rörande total investeringskostnad, energi- och resursbesparing samt utsläppsreducering. Två fall av produktion undersöks, dels vid drift enligt Götvalsverkets befintliga produktionstid och dels med en optimerad drifttid för kompressorenheterna. En litteraturstudie har också genomförts där flera studier visar att tryckluft är ett dyrt alternativ för energiproduktion och att implementering av effektiviseringsåtgärder, däribland återvinning av spillvärme, därför kan vara väl grundade investeringar. Även andra fördelar kan kopplas till energieffektivisering, exempelvis förbättrad produktion och arbetsmiljö för anställda. Resultatet av arbetet visade att särskilt ett kompressoralternativ stod ut från de övriga ur både en ekonomisk- och miljömässig synpunkt. Detta alternativ erbjöd inte den billigaste investeringen men däremot var mängden återvunnen värme så pass mycket större än för andra alternativ, att energibesparingen minskade återbetalningstiden drastiskt. Tillvaratagande av befintliga resurser som spillvärme, tillsammans med industrins minskade energianvändning, anses vara en nödvändighet för att kunna säkerställa välmående hos både människor, djur och natur i framtiden. / In order to meet the growing demand for energy in the future, while contributing to a long-term sustainable energy supply, resource and energy efficiency measures are required within several sectors. In 2016 the industry sector accounted for more than 50 percent of the global power demand. The use of existing resources, such as waste heat from compressed air production, is a possible efficiency measure.  Behind this thesis work is a request from the Sandvik AB Group to estimate savings potential and reinvestment costs in one of the industry's compressor centers, Götvalsverket. The reinvestment refers to two new compressors whose waste heat is integrated into the industry's existing district heating system and allows for reduced resource and energy costs as well as a reduction of CO2-emissions.  This work aims to investigate different compressor alternatives from an economic- and environmental perspective. This is done using collected data, a sensitivity analysis and profitability calculations with an attached LCC-analysis. The aim is to answer various questions regarding total investment cost, energy and resource saving as well as emission reduction. Two cases in production are investigated. The first according to the existing operation hours in Götvalsverket and the second case with an optimized operating time for the compressor units.  A literature review has also been conducted where several studies show that compressed air is an expensive alternative to energy production and that implementation of efficiency measures, including waste heat recovery, can be well-founded investments. Other benefits can also be linked to energy efficiency, such as improved production and an improved work environment for employees.  The result of the work showed that one alternative in particular stood out from the other compressor solutions, both from an economic and environmental point of view. This option did not offer the cheapest investment but the amount of recovered waste heat was much larger than for the other alternatives and therefore, energy savings reduced the payback period drastically.  The utilizing of existing resources such as waste heat, together with the industry sector’s reduced energy consumption, is considered a necessity in order to ensure the well-being of people, animals and nature in the future.