This work aims to investigate the potential electricity savings, as well as the potential decrease in LCoH and OPEX, that an integration of an industrial heat pump can have on a molten salt-based power-to-heat system with integrated thermal energy storage. The original system uses an electric heater to heat up molten salt, which acts as the heat transfer fluid of the system, from which heated steam can be produced and delivered at the output. The idea of integrating an industrial heat pump into this power-to-heat system is that it would heat up the molten salt for a certain temperature range in the beginning of the heating phase, while the electric heater would be used for the later part of the heating phase of the molten salt.  First, a background section is presented in order to provide background information about the topic at hand, primarily focusing on heat pump theory and avaliable process- and waste heat that could be used by an industrial heat pump. After that, a system configutaion is presented of the investigated power-to-heat system with all the components in it thoroughly explained. The methodology followed throughout this work is then presented, which includes the description of a mixed-integer linear program that is of fundamental importance in relations to this work, and used for conducting simulations from which much of the results is derived from.  When using a waste heat tempreture of 100°C and a sink temprerature of 250°C for the industrial heat pump, results show that the electrical power used in the system without an industrial heat pump can be decreased by 15,6%. Moreover, a maximum decrease of 13,4% of the LCoH and 16,6% of the OPEX can be achieved by the integration of the industrial heat pump. The biggest decrease, in regard to the LCoH and the OPEX, were for the countries with the highest average electricity prices, while a smaller decrease was shown for the countries with lower average electricity prices.  A cost increase for the industrial heat pump, which would affect the CAPEX of the system, was shown to have a small outcome for the LCoH savings, the major contributor was the OPEX of the system. If any impactful change for this particular power-to-heat system is desired, it's going to have to decrease the OPEX for best result, which is what the integration of an industrial heat pump aims at doing.

No description available.

No description available.

Over the past 20 years research into miniature actuators has been increasing. In addition to having a compact geometry, desirable characteristics for miniature actuators include having a large power-to-weight ratio, fast response, fine resolution of movement and high power efficiency. In the first part of this thesis the design of a miniature rotary robot joint is presented. Two single acting miniature cylinders each with a bore diameter of 4 mm drive the joint using water as the hydraulic fluid. The cylinders are mated to a rack and pinion mechanism that converts the opposing linear motion of the cylinders shafts into rotation. Also within the design, a novel position sensor using magnetic field sensing technology is presented. Overall, the joint measures 11 mm wide x 8.8 mm high x 150 mm long. In the second part of this thesis a hydraulic servo positioning system is presented along with a novel valve modeling technique and two position control strategies. Four low-cost, 3-way on/off solenoid valves were used to control the flow of the water in and out of the cylinders. The two nonlinear position controllers employed were a position-velocity-acceleration plus model-based feedforward controller (PVA+FF) and a novel PVA + FF plus sliding mode controller. For experiments involving horizontal rotation of the joint while carrying no load the PVA +FF controller achieved a steady-state error of ± 0.77° or ± 0.06 mm in terms of rack position. The steady-state error produced by the PVA + FF plus sliding mode controller was ± 0.85° or ± 0.07 mm. The maximum tracking error produced by both controllers was 5° or 0.41 mm and occurred during the initial cycloidal rising portion of a 120° displacement. The root mean square error (RMSE) of the PVA + FF and PVA + FF plus sliding mode controllers were 42% and 54% less than that produced by a linear PVA controller. Both controllers were found to be robust to changes in payload. This was experimentally verified by adding masses of 6.5 g and 13.5 g to the end of the output link of the joint. By conducting similar experiments in the vertical direction it was found that the PVA + FF plus sliding mode controller was more robust, achieving on average a 30% reduction in RMSE compared to the FF + PVA controller. / Thesis / Master of Applied Science (MASc)

The research hereto intends to analyse consistency of the legal order or the duty of legislative consistency (Folgerichtigkeit), as a part of the understanding the Law as a system, in order to (I) understand, define and demonstrate the fundamentals of the the duty of legislative consistency and (II) to demonstrate the implementation of the duty legislative consistency in tax law, applying its control mechanisms. To achieve the goal to delimit and demonstrate the fundamentals of the constitutional duty of legislative consistency, are facing three major issues: 1) is the definition of legislative consistency, analyzing its development, its dimensions of effectiveness, its contrast with similar institutes, proving to be a complex legislative consistency standard can be employed to guide the legislator in the preparation of standards in attention to relations of new standards with the pre-defined already by him (legislative consistency postulate) , to achieve the ideal of distributive justice by requirement continues to pursue the egalitarian distribution of privileges and the tax burden (legislative-consistency principle), as limited to the power to legislate by imposing the elaboration of consistent laws and free of unjustified discrimination (legislative consistency-rule) and also as a criterion for evaluation of normative content material compatibility (legislative consistency-criterion). Its Foundation is given by deriving from the rule of law and legislation and equality. Through it we need the Legislature to autovinculação so that the more intensely it has set an Institute, the higher your burden of justification for deviating from the duty of legislative consistency. Secondly the duty of legislative consistency is applied to the tax law, through the control of equality and a systematic approach. As for example apply these controls for the non-cumulative PIS and COFINS inserted specifically in relation to two issues: (1) the imposition of restriction on crediting, realizing the legislative inconsistency in that the purpose of the standard and how it has been implemented are not consistent and (2) the discrímen criteria for imposition of cumulative or non-cumulative regime the given contributor. Also in this case there is legislative inconsistency.

The research hereto intends to analyse consistency of the legal order or the duty of legislative consistency (Folgerichtigkeit), as a part of the understanding the Law as a system, in order to (I) understand, define and demonstrate the fundamentals of the the duty of legislative consistency and (II) to demonstrate the implementation of the duty legislative consistency in tax law, applying its control mechanisms. To achieve the goal to delimit and demonstrate the fundamentals of the constitutional duty of legislative consistency, are facing three major issues: 1) is the definition of legislative consistency, analyzing its development, its dimensions of effectiveness, its contrast with similar institutes, proving to be a complex legislative consistency standard can be employed to guide the legislator in the preparation of standards in attention to relations of new standards with the pre-defined already by him (legislative consistency postulate) , to achieve the ideal of distributive justice by requirement continues to pursue the egalitarian distribution of privileges and the tax burden (legislative-consistency principle), as limited to the power to legislate by imposing the elaboration of consistent laws and free of unjustified discrimination (legislative consistency-rule) and also as a criterion for evaluation of normative content material compatibility (legislative consistency-criterion). Its Foundation is given by deriving from the rule of law and legislation and equality. Through it we need the Legislature to autovinculação so that the more intensely it has set an Institute, the higher your burden of justification for deviating from the duty of legislative consistency. Secondly the duty of legislative consistency is applied to the tax law, through the control of equality and a systematic approach. As for example apply these controls for the non-cumulative PIS and COFINS inserted specifically in relation to two issues: (1) the imposition of restriction on crediting, realizing the legislative inconsistency in that the purpose of the standard and how it has been implemented are not consistent and (2) the discrímen criteria for imposition of cumulative or non-cumulative regime the given contributor. Also in this case there is legislative inconsistency.

The research hereto intends to analyse consistency of the legal order or the duty of legislative consistency (Folgerichtigkeit), as a part of the understanding the Law as a system, in order to (I) understand, define and demonstrate the fundamentals of the the duty of legislative consistency and (II) to demonstrate the implementation of the duty legislative consistency in tax law, applying its control mechanisms. To achieve the goal to delimit and demonstrate the fundamentals of the constitutional duty of legislative consistency, are facing three major issues: 1) is the definition of legislative consistency, analyzing its development, its dimensions of effectiveness, its contrast with similar institutes, proving to be a complex legislative consistency standard can be employed to guide the legislator in the preparation of standards in attention to relations of new standards with the pre-defined already by him (legislative consistency postulate) , to achieve the ideal of distributive justice by requirement continues to pursue the egalitarian distribution of privileges and the tax burden (legislative-consistency principle), as limited to the power to legislate by imposing the elaboration of consistent laws and free of unjustified discrimination (legislative consistency-rule) and also as a criterion for evaluation of normative content material compatibility (legislative consistency-criterion). Its Foundation is given by deriving from the rule of law and legislation and equality. Through it we need the Legislature to autovinculação so that the more intensely it has set an Institute, the higher your burden of justification for deviating from the duty of legislative consistency. Secondly the duty of legislative consistency is applied to the tax law, through the control of equality and a systematic approach. As for example apply these controls for the non-cumulative PIS and COFINS inserted specifically in relation to two issues: (1) the imposition of restriction on crediting, realizing the legislative inconsistency in that the purpose of the standard and how it has been implemented are not consistent and (2) the discrímen criteria for imposition of cumulative or non-cumulative regime the given contributor. Also in this case there is legislative inconsistency.

Le « Power-to-Gas » pourrait devenir une solution attractive pour le stockage des énergies renouvelables, pourvu que des électrolyseurs soient capables de fonctionner efficacement dans des conditions intermittentes à un coût abordable. Ce travail a pour objectif d'évaluer la faisabilité technique du fonctionnement intermittent de systèmes d'électrolyse à oxyde solide (SOEC) autour de 1073 K. Des conditions réalistes défavorables sont considérées, consistant en un système autonome sans source externe de chaleur et intégrant une compression d'hydrogène à 3 MPa. La problématique se compose de deux aspects : i) la gamme de fonctionnement du système, limitée à 60-100% en raison de gradients thermiques, est étendue via des stratégies de contrôle efficaces, ii) des procédures sont définies pour minimiser l'impact de l'intermittence sur la durée de vie. Premièrement, une stratégie de contrôle modulaire est proposée, consistant en l'utilisation de plusieurs unités indépendantes qui fonctionnent dans une gamme de puissance tolérable, ou sont arrêtées. La gamme de fonctionnement du système est ainsi étendue à 15-100% dans le cas de quatre unités. Une stratégie de contrôle complémentaire, consistant en un chauffage électrique interne, permet d'étendre la gamme de fonctionnement en réduisant les gradients thermiques, mais elle est susceptible de diminuer la durée de vie. Elle n'est donc appliquée qu'à une unité afin de suivre la courbe de charge et d'étendre la gamme de fonctionnement du système à 3-100%. Deuxièmement, 1800 cycles électriques on-off sont appliqués à une SOEC sans impact sur la dégradation, ce qui montre que des arrêts/démarrages répétés ne diminuent pas la durée de vie. De plus, des procédures de démarrage, standby et arrêt sont définies. Enfin, deux études de systèmes Eolien-SOEC et Solaire-SOEC fonctionnant pendant un an montrent que, avec les stratégies de contrôle implémentées, le système SOEC stocke la puissance appliquée avec un rendement de 91% sur PCS en moyenne, alors que les unités fonctionnent dans des conditions tolérables mis à part une unité qui suit la courbe de charge et est susceptible d'avoir une durée de vie diminuée. / Power-to-Gas could become an attractive solution for renewable electricity storage, provided that affordable electrolysers are able to operate efficiently under intermittent conditions. This work aims to assess the technical feasibility of operating intermittently a Solid Oxide Electrolysis Cell (SOEC) system around 1073 K. Realistic unfavourable conditions are considered, consisting in a standalone system operated with no external heat source and integrating hydrogen compression to 3 MPa. Two challenges are tackled in this work: i) the system power load range, limited to 60-100% due to thermal gradients, is extended via efficient control strategies, ii) procedures are defined to minimise the impact of the intermittency on the lifetime. First, a modular control strategy is proposed, consisting in the use of several SOEC units which are either operated in a tolerable power load range, or switched off. The system power load range is hence extended to 15-100% in the case of four units. A complementary control strategy, consisting in internal electrical heating, enables to extend the load range by reducing thermal gradients, but it may decrease the lifetime. Thus, it is applied to only one unit for it to follow the load curve and extend the system power load range to 3-100%. Secondly, 1800 on-off electric cycles are applied to an SOEC with no degradation increase, which shows that repeated start/stops do not decrease the lifetime. Start-up, standby and shut-down procedures are also defined. Finally, two case studies of Wind-SOEC and Solar-SOEC systems operated over one year show that, with the implemented control strategies, the SOEC system stores the applied power with an average efficiency of 91% vs. HHV, while units operate under tolerable conditions apart from one unit which follows the load curve and may have a decreased lifetime.

Urgent CO2 mitigation strategies are crucial to combat climate change. Power-to-X encompasses the conversion of renewable electricity into carbon-neutral fuels, such as hydrogen and its derivatives. E-methanol, both an e-fuel and a platform chemical, can be obtained by combining hydrogen with biogenic CO2. Moreover, e-methanol holds the potential to defossilize both heavy transportation and chemical sectors, by reducing the reliance on fossil fuels. Sweden and Finland are global leaders in the wood processing industry, offering substantial potential for capturing and utilizing biogenic CO2 emissions from industrial flue gases in e-methanol production. The pulp and paper industry and the energy sector with combined heat and power plants are identified as the best point sources for biogenic emission capture in Sweden and Finland, due to their substantial use of biomass and biofuels. The thesis comprises a quantitative analysis with cost curve calculations to identify the key cost drivers of a power-to-methanol project. Additionally, a qualitative analysis is conducted to examine other important aspects influencing the project’s feasibility, such as power plant availability, environmental benefits, and grid availability. The levelized cost of e-methanol is calculated to range from 1,873 to 951 €/t depending on production capacity and electricity price area, compared to the current market value of fossil methanol estimated at an average of approximately 250 €/t. The key cost drivers for e-methanol projects include initial investments in technologies such as water electrolysis and carbon capture technology, as well as potential requirements for seasonal CO2 storage. A project’s geographical location will also impact production costs due to fluctuating electricity prices and grid availability in different electricity price areas. Among these areas, price area FI turned out to be the most feasible, while SE1 and SE3 are considered the least feasible regions for implementing a power-to-X project. Nevertheless, power-to-methanol presents an opportunity for the establishment due to society’s dependence on carbon. However, due to the high production costs, the realization of a power-to-methanol project might be infeasible without financial support, subsidies, and regulatory frameworks promoting and increasing the demand for sustainable and environmentally friendly fuels. / Akuta åtgärder krävs för att minska koldioxidutsläpp som är avgörande för att bekämpa den pågående klimatförändringen. Power-to-X innebär omvandling av förnybar elektricitet till koldioxidneutrala bränslen, såsom vätgas och dess derivat. E-metanol är både ett elektrobränsle och en viktig komponent inom kemikalieindustrin som främställs genom att kombinera grön vätgas och biogen koldioxid. E-metanol har potential att minska beroendet av kol inom sektorer för tungtransport och kemikalieindustrin genom att ersätta användandet av fossila bränslen. Sverige och Finland är världsledande inom skogsindustrin och har en betydande potential att fånga och använda biogen koldioxid från industriella rökgaser i produktionen av e-metanol. Pappersmassafabriker och energisektorn med kraftvärmeverk identifieras som de bästa punktkällorna för infångning av biogena utsläpp i Sverige och Finland, tack vare deras omfattande användning av biomassa och biobränslen. Uppsatsens omfattas en kvantitativ analys för kostnadsberäkningar, samt en kvalitativ analys för att undersöka andra viktiga aspekter som påverkar projektets genomförbarhet, såsom tillgänglighet av industrier, miljöfördelar samt möjligheten till att få en anslutningspunkt på elnätet. Produktionskonstnaden för e-methanol beräknas variera mellan 1 873 €/t till 951 €/t beroende på productionskapacitet och elprisområde, jämfört med det nuvarande marknadsvärdet för metanol som ligger runt 250 €/t. De primära kostnadsdrivarna i dessa projekt är investeringskostnaderna i tekniker så som elektrolyser och teknik för koldioxidinfångning, samt eventuella kostnader för långtidslagring av koldioxid. Projektets geografiska placering påverkar också produktionskonstanderna på grund av variationer i elpris och tillgång till elnätskapacitet i olika områden. Resultaten pekar på att det mest lämpliga prisområdet är FI, medan prisområde SE1 och SE3 anses vara minst lämpliga för implementeringen av ett power-to-X-projekt. Trots detta finns det stor potential för realiseringen av e-metanol baserat på samhällets beroende av kol. På grund av de höga produktionskostnaderna kan projektets genomförbarhet dock vara osäker utan ekonomiskt stöd, subventioner och regulationer som förespråkar och ökar efterfrågan på miljövänliga bränslen.

A evolução da tecnologia e o acesso ao conhecimento proporcionam um ambiente de negócios cada vez mais mutante e competitivo. A informação é vista como essência da estratégia empresarial, onde a busca e manutenção do diferencial competitivo são constantes. As empresas de uma forma geral, e principalmente as pequenas empresas, necessitam de meios para acompanhar essas mudanças de forma a ajustar suas estratégias ao novo contexto apresentado. O objetivo desta dissertação é demonstrar que a internet pode ser utilizada como meio para o acompanhamento das informações do ambiente externo à empresa. A internet vem ao encontro desta realidade ao possibilitar o monitoramento das variáveis macro-ambientais: governo, legislação, tecnologia e informática, sócio-cultural, demográfica, estatística, fiscal e tributária, política e, econômica e financeira. A revisão bibliográfica aborda a importância para a pequena empresa em acompanhar as variáveis macro-ambientais, e ter o conhecimento destas informações para o processo decisório estratégico. No estudo exploratório foi feita extensa pesquisa, principalmente na internet, buscando identificar sites com as informações relacionadas a cada variável identificada pela revisão bibliográfica. Visando proporcionar informações para que a empresa decida estrategicamente com eficácia diante de ameaças ou restrições ambientais, além de também capitalizar as oportunidades oferecidas pelo ambiente, esta dissertação apresenta como resultado um guia de sites de conteúdo, com o intuito de facilitar a busca das informações macro-ambientais que influenciam direta ou indiretamente cada negócio. / The evolution of the technology and the access to the business-oriented knowledge provide to an environment each more mutant and competitive time. The information is seen as essence of the enterprise strategy, where the search and maintenance of the competitive differential are constant. The companies of one form generality, and mainly the small companies, need half following these changes of form to adjust its strategies to the new presented context. The objective of this dissertation is to demonstrate that the internet can be used as half for the accompaniment of the information of the external environment the company. The internet comes to the meeting of this reality when making possible the monitoring of the macro-ambient variable: government, legislation, technology and computer science, partner-cultural, demographic, statistics, inspector and tax, politics and, economic and financial. The bibliographical revision approaches the importance for the small company in following the macro-ambient variable, and having the knowledge of these information for the strategical power to decide process. In the exploratory study extensive research was made, mainly in the internet, searching to identify sites with the information related to each variable identified for the bibliographical revision. Aiming at to provide information so that the company strategically decides with effectiveness ahead of threats or ambient restrictions, beyond also capitalizing the chances offered for the environment, this dissertation it presents as resulted a guide of sites of content, with intention to indirectly facilitate to the search of the macro-ambient information that influence direct or each business.