The integration of Photovoltaic (PV) with buildings changes the previous electricity consumers into prosumers. The reduced PV subsidies and the grid stable operation requirements are pushing prosumers from direct exportation to self-consumption of the produced electricity. Electricity storage increases the self-consumption, while comes with higher investment. During the system planning stage, the benefits of storage should be clarified to prosumers. The storage type, the storage capacity and the system operation strategy should be determined at the same time.     This thesis dealt with a grid-connected PV-storage system and proposed an optimization method, which simultaneously determined the storage capacity and rule-based operation strategy parameters. This method eliminated the necessity of forecasting and could be easily implemented. A typical residential building in Sweden was taken as a case study. Different operation strategies as well as two storage technologies – battery storage and hydrogen storage – were compared.     For the battery storage system, the proposed battery hybrid operation strategy, which carries out the conventional operation strategy during warm months and the peak shaving strategy during cold months, provides the best performance in Self Sufficiency Ratio (SSR) and Net Present Value (NPV). For the hydrogen storage system, the hydrogen hybrid operation strategy outperforms other studied operation strategies under different scenarios, which have optimistic or pessimistic cost assumptions of the hydrogen storage system.     The comparison between hydrogen storage and battery storage suggests that battery storage has much better performance in SSR and NPV under the pessimistic cost scenario. Under the optimistic cost scenario, battery storage and hydrogen storage achieve comparable performance in SSR and NPV. However, hydrogen storage is more favorable when considering reducing the prosumer’s negative impact on the grid. / <p>QC 20170412</p>

Under the competitive situation of globalization, the competition and challenges that the enterprises are confronting now are more rigorous than in the past. The PCB industries in Taiwan had ever ranked the third biggest in the world. However, on account of the shifting of the manufacturing bases in the worldwide, in 2002 the PCB output value in China had taken the place of Taiwan and become the third biggest in the world. And in the course of PCB industry development in China, the PCB enterprises from Taiwan had also participated in it early or late. The main inducing reasons were because of the undeveloped markets, low labor and land cost. When the arising of new and developing markets has made the scale of the enterprises expand from the arrangement of single area (Taiwan) into regional areas (Asia), the management range of the enterprise has also expanded at the same time and the management and cost problems it derived and the related problems caused by the management risks due to obscure information will be coming up. Therefore, how to connect the nerve center of the enterprise with each subsidiary, logistic warehouses, customers and suppliers of the group and integrate and set up the information network of upper and lower reaching customers and manufacturers and subsidiary and establish a set of mode suitable for the implement of information plans of the group and for the organization management so as to achieve the goals of fast information obtaining, policy making and real-time reaction and enable the overall arrangement of globalization to elaborate multiple effects, which is the purpose of the study. The study has analyzed the management of supply chain, the global planning and management mode and the application and development of information technology and also proceeded extensive analysis and research from the industrial structure, characteristics of PCB and its future competition superiority. Under the information goal of enhancing enterprise¡¦s competition superiority, the study has proposed related suggestions from the organization and management dimensions and information technology and application support dimension. 1. On the organization dimension and the plan of organization functions, achieve centralized planning so as to conform to the company¡¦s overall biggest profits; to maintain and implement of the subsidiary in each area to conform to the effects of localization and discrepancy; to avoid excessive centralized management which will cause the ineffectiveness of operation in each subsidiary or the excessive independence of the area which will cause the difficulties of the overall information establishment standardization and integration. Therefore, in addition to the original vertical framework, it has increased the planning of investigation organization functions (horizontal organization) so as to assist to help with the management and operation among between multi-site companies. 2. On the management dimension, it has developed modes from information system according to five stages of work: (1) the system planning stage (2) the system analysis stage (3) the system development stage (4) the conduction stage of system duplication and (5) system maintenance stage to scheme discussion topics like multi-area resources integration, multi-area coordinated collaboration system and multi-area rights and duties of labor division to be developed into an information construction management mode. 3. On the dimension of information technology and application support, according to the trade object and trade conduct of the enterprise, it has advanced the framework o f enterprise¡¦s information operation strategy and logistics management. Besides, it has conferred the framework of the information integration according to the aspect of resources sharing among the group¡¦s subsidiary so as to achieve the goals of supporting enterprise¡¦s strategy development and management optimization. Eventually it has proposed the blueprint of PCB industry system construction, the steps of system construction, and the constructional labor division mode of information among regional subsidiary of the group to be offered for the trade to refer to this framework under such global operation strategy and logistics management to develop the information system of supporting the enterprise¡¦s core competition superiority.

Combined cooling, heating and power (CCHP) systems are known as trigeneration systems, designed to provide electricity, cooling and heating simultaneously. The CCHP system has become a hot topic for its high system efficiency, high economic efficiency and less greenhouse gas (GHG) emissions in recent years. The efficiency of the CCHP system depends on the appropriate system configuration, operation strategy and facility size. Due to the inherent and inevitable energy waste of the traditional operation strategies, i.e., following the electric load (FEL) and following the thermal load (FTL), more efficient operation strategy should be designed. To achieve the highest system efficiency, facilities in the system should be sized to match with the corresponding operation strategy. In order to reduce the energy waste in traditional operation strategies and improve the system efficiency, two operation strategy design methods and sizing problems are studied (In Chapter 2 and Chapter 3). Most of the improved operation strategies in the literature are based on the ''balance'' plane, which implies the match of the electric demands and thermal demands. However, in more than 95% energy demand patterns, the demands cannot match with each other at this exact ''balance'' plane. To continuously use the ''balance'' concept, in Chapter 2, the system configuration is modified from the one with single absorption chiller to be the one with hybrid chillers and expand the ''balance'' plane to be a ''balance'' space by tuning the electric cooling to cool load ratio. With this new ''balance'' space, an operation strategy is designed and the power generation unit (PGU) capacity is optimized according to the proposed operation strategy to reduce the energy waste and improve the system efficiency. A case study is conducted to verify the feasibility and effectiveness of the proposed operation strategy. In Chapter 3, a more mathematical approach to schedule the energy input and power flow is proposed. By using the concept of energy hub, the CCHP system is modelled in a matrix form. As a result, the whole CCHP system is an input-output model. Setting the objective function to be a weighted summation of primary energy savings (PESs), hourly total cost savings (HTCs) and carbon dioxide emissions reduction (CDER), the optimization problem, constrained by equality and inequality constraints, is solved by the sequential quadratic programming (SQP). The PGU capacity is also sized under the proposed optimal operation strategy. In the case study, compared to FEL and FTL, the proposed optimal operation strategy saves more primary energy and annual total cost, and can be more environmental friendly. Finally, the conclusions of this thesis is summarized and some future work is discussed. / Graduate

Made available in DSpace on 2016-06-02T19:51:36Z (GMT). No. of bitstreams: 1 2023.pdf: 1308724 bytes, checksum: f3a247776a2391453b8eb11806c01078 (MD5) Previous issue date: 2008-08-06 / This work assumes that the success of an enterprise can be reached out more easily if the strategic hierarchies are respected. Thus, the decisions referring to the operational area ought to follow the paths proposed by the operation strategy, which should be subordinated to and coherent with the corporative strategy. Having this as a main basis, this study focuses on the strategic objectives of operations and, by means of case studies, it aims at verifying the contribution of enterprise management system (EMS) to its elaboration. The cases were studied aiming at knowing the performance objectives most valued by the company administration and the production function too. Next, this work studies in the operational area which traits of a EMS can mostly contribute in the effectiveness of these strategic objectives. Finally, an inventory about the utilization of the EMS is elaborated and a comparative analysis is carried out so that it is possible to identify the adequacy level existent. In order to get the reader acquainted to the themes discussed a bibliographical review was made and it covers Operation Strategy, Enterprise Management System and the Strategic Alignment between them. By the end of this study, it was possible to observe that the enterprise strategy has been communicating efficiently with the operational area and that the utilization of EMS contributes to the strategic effectiveness of operation. Nevertheless, it can be realized that this contribution could be more relevant in case the alignment between Operational areas and IT were worked out more elaboratedly. In relation to the alignment level, analyses did not show significant differences neither among the companies researched in spite of the fact they belong to different action areas, nor among different EMS or their versions. / Este trabalho parte do princípio de que o sucesso de uma organização é alcançado mais facilmente se as hierarquias estratégicas forem respeitadas. Sendo assim as decisões referentes à área produtiva deveriam seguir as diretrizes propostas pela estratégia de produção que, por sua vez, deveria estar subordinada e coerente à estratégia corporativa. Tendo isso como fundamento principal, o estudo foca os objetivos estratégicos da produção e, por meio de estudos de casos, procura verificar a contribuição dos sistemas de gestão empresarial (SGE) à sua efetivação. Busca-se conhecer nos casos estudados quais os objetivos de desempenho priorizados pela administração da empresa e também pela função produção. Em seguida, junto à área de operações, procura-se identificar quais as funcionalidades de um SGE poderiam contribuir mais na concretização desses objetivos estratégicos. Por fim é realizado um inventário sobre a utilização do SGE e uma análise comparativa é realizada para identificar o nível de adequação existente. Para a equalização do conhecimento em relação aos temas discutidos, também elaborou-se uma revisão bibliográfica sobre Estratégia de Produção, Sistemas de Gestão Empresarial e do Alinhamento Estratégico entre eles. Ao concluir o trabalho, foi possível observar que a estratégia empresarial está sendo comunicada com eficiência à área operacional e que a utilização do SGE contribui para a efetivação estratégia de produção. Entretanto, percebe-se que essa contribuição poderia ser mais relevante caso o alinhamento estratégico entre as áreas de Produção e TI fosse trabalhado com mais afinco. Em relação ao nível de alinhamento, as análises não mostraram diferenças significativas entre as empresas pesquisadas, apesar de pertencerem a áreas de atuação distintas, nem entre os diferentes SGE ou versões dos mesmos.

Diese Arbeit entstand an der Professur für Fahrzeugmodellierung und –simulation der TU Dresden in Zusammenarbeit mit der Fa. Bombardier Transportation („Bombardier Center of Competence“). In einem Teilprojekt dieser Kooperation wird die Einführung technischer Funktionen und Systeme zur Energieeinsparung bei Lokomotiven untersucht. Die Nutzung von Speichertechnologien ist neben der Abwärmenutzung und der energiesparenden Fahrweise die effizienteste Maßnahme zur Senkung des Kraftstoffverbrauchs bei Dieselfahrzeugen. Zusätzlich zur Rekuperation von Bremsarbeit können die Funktionen Lastpunktverschiebung und emissionsfreier Betrieb mit Hilfe eines Energiespeichers realisiert werden. Der Einsatz elektrischer Energiespeicher erweist sich als geeignet für dieselelektrische Schienenfahrzeuge im Personenverkehr, da diese durch die bereits vorhandenen elektrischen Antriebskomponenten relativ einfach zu hybridisieren sind und eine nutzungsgerechte Speicherauslegung aufgrund weitgehend bekannter Fahraufgaben möglich ist. In der Arbeit wird ein durchgängiges Verfahren zur Auslegung von dieselelektrischen Lokomotiven mit Energiespeichern im Personenverkehr beschrieben. Im Fokus liegt dabei der Einsatz von Optimierungsalgorithmen zur Verbesserung des Generatorsystems und des Einsatzes von elektrischen Energiespeichern im Hinblick auf den Kraftstoffverbrauch und die weiteren Anteile der Lebenszykluskosten. Das im Rahmen der Arbeit erstellte Programm zur energetischen Simulation bildet die Basis zur Untersuchung verschiedener Strategien für die Fahrtgestaltung unter Berücksichtigung der Fahrzeitreserven, den Betrieb des Energiespeichers und der Steuerung von Anlagen mit mehreren Dieselmotorgeneratorsätzen. Neben der Nutzung regelbasierter Strategien werden dabei auch vorausschauende Betriebsstrategien eingesetzt, welche die Möglichkeiten der bei Schienenfahrzeugen im Vorfeld bekannten Streckengeschwindigkeit und -topologie nutzen. Die dafür angewandten Methoden sind die Dynamische Programmierung nach BELLMANN und der äquivalenzkostenbasierte Betrieb. Die Optimierung der Fahrzeugkonfiguration wird durch einen Programmbaustein realisiert, welcher unter Berücksichtigung der Lokkonfiguration und der Energiesimulation für ein vorgegebenes Streckenprofil die Verbrauchs-, Instandhaltungs- und Anschaffungskosten für das Fahrzeug berechnet.

Made available in DSpace on 2016-06-02T19:51:33Z (GMT). No. of bitstreams: 1 DissABLS.pdf: 818147 bytes, checksum: e33a5c52f04685e2c15d88c2eb81643c (MD5) Previous issue date: 2007-09-10 / This research aims to understand how white goods company s production strategy affects structural and relacional aspects of supply chain management, in specially those relatives of first tier suppliers. A reason for this research is the importance of understanding the dynamic of companies supply chain, constantly requested to serve all kinds of different markets. It couldn t be found a referential model to analyze this research, so a hypothesis is used: production strategy decisions influences the structure and relationship of supply chain management by execution of business process with suppliers. So, based on some aspects of production strategy and supply chain management literature, this research seeks to determine some elements capable of management tools to find out if that hypothesis is correct.The managemently elements are taken because they promote the integration of business process, bonding focal company and suppliers. This research is characterized by explorative and qualitative search and the way to get information is done through interviews with purchase and products development managers of focal company and production managers of suppliers companies. The main contribution of this research is to find out that production strategy s focal company influences the structure and relationship of supply chain management. This occur by conformation of managemently elements that allow cooperation of first tier suppliers, due to those stand the execution of business process of focal company. / Este trabalho tem como objetivo entender como a estratégia de produção de uma montadora do setor de linha branca afeta os aspectos estruturais e relacionais de gestão da cadeia de suprimentos, em especial aqueles relativos aos fornecedores de primeira camada. Uma justificativa para a condução deste trabalho é a crescente relevância do entendimento sobre a dinâmica da cadeia de suprimentos de uma empresa, cujo gerenciamento é requerido para se atender as constantes exigências de mercado. Como não há um modelo de referência já difundido para suportar a proposição analítica desenvolvida nesta dissertação, parte-se da hipótese de que a estratégia de produção influencia a estrutura e as relações de gestão da cadeia de suprimentos mantidas com membros da cadeia a partir da execução dos processos de negócios estabelecidos com fornecedores. Assim, utilizando-se a literatura de estratégia de produção e gestão da cadeia de suprimentos, definem-se alguns elementos gerenciáveis para verificar, por meio de um estudo de caso, se tal hipótese pode ser considerada plausível. Os elementos gerenciáveis foram escolhidos por fomentarem a integração de processos de negócios entre empresa focal e seus fornecedores. Tal abordagem caracteriza a pesquisa como exploratória e qualitativa em que o principal meio de obtenção de informações foram entrevistas realizadas com pessoas de nível gerencial das áreas de compras e desenvolvimento de produto na empresa focal e com os gerentes de produção de seus fornecedores. A principal contribuição deste trabalho é a verificação de que a estratégia de produção da empresa focal influencia a estrutura e as relações de sua gestão da cadeia de suprimentos. Isso ocorre por meio da conformação dos elementos gerenciáveis que permitem obter maior cooperação dos fornecedores de primeira camada, uma vez que esses apóiam fortemente a execução dos processos de negócios da empresa focal.

In response to growing concerns regarding global warming and climate change, reduction of CO2 emissions becomes a priority for many countries, especially the developed ones such as the UK. Residential applications are considered among the most important areas for substantial reduction of CO2 emissions because they represent a major part of the total consumed energy in those countries. For instance, in the UK, residential applications are currently accountable for about 150 Mt CO2 emissions, which represents approximately 25% of the whole CO2 emissions [1-2]. In order to achieve a significant CO2 reduction, many strategies must be adopted in the policy of these countries. One of these strategies is to introduce micro combined heat and power (μCHP) systems into residential energy systems, since they offer several advantages over traditional systems. A significant amount of research has been carried out in this field; however, in terms of integrating such systems into residential energy systems, significant work is yet to be conducted. This is because of the complexity of these systems and their interdependency on many uncertain variables, energy demand of a house is a case in point. In order to achieve such integration, this research focuses on the optimisation and operation of μCHP systems in residential energy systems as essential steps towards integration of these systems, so it deals with the optimisation and operation of a μCHP system within a building taking into account that the system is grid-connected in order to export or import electricity in certain cases. A comprehensive review that summarises key points that outline the trend of previous research in this field has been carried out. The reviewed areas include: technologies used as residential μCHP units, modelling of the μCHP systems, sizing of μCHP systems and operation strategies used for such systems. To further this, a generic model for sizing of μCHP system’s components to meet different residential application has been developed by the author. Two different online operation strategies of residential μCHP systems, namely: an online linear programming optimiser (LPO) and a real time fuzzy logic operation strategy (FLOS) have been developed. The performance of the novel online operation strategies, in terms of their ability to reduce operation costs, has been evaluated. Both the LPO and the FLOS were found to have their advantages when compared with the traditional operation strategies of μCHP systems in terms of operation costs and CO2 emissions. This research should therefore be useful in informing design and operation decisions during developing and implementing μCHP technologies in residential applications, especially single dwellings.

Die verschiedenen Maßnahmen zur Senkung des Kraftstoffverbrauchs von dieselbetriebenen Schienenfahrzeugen sind Gegenstand der Forschung und werden in den kommenden Jahren, bedingt durch weltweit anwachsendes Transportvolumen, begrenzte Ressourcen und steigendes Umweltbewusstsein, weiter an Bedeutung zunehmen. Die Nutzung der Abgasenthalpie des Dieselmotors stellt dabei eine Möglichkeit zur Reduktion des Kraftstoffverbrauchs dar. Im Vergleich zu anderen Methoden ist der absolute Einfluss auf den Verbrauch zwar geringer, eine Kombination ist jedoch möglich und führt zu einer Verbesserung der Energieeffizienz. In dieser Arbeit wird die Möglichkeit der Abgasenthalpienutzung mittels thermoelektrischer Generatoren (TEG) betrachtet. Diese hat den Vorteil einer hohen Leistungsdichte, eines geringen Wartungsaufwands sowie einer einfachen Integration in die Topologie der exemplarisch untersuchten Lokomotive. Bei der Umsetzung sind wesentliche Randbedingungen wie die herrschenden Abgastemperaturen und -massenströme das verfügbare Einbauvolumen und der maximal zulässige Abgasgegendruck, zu beachten. Weiterhin stellt sich die thermomechanische Festigkeit der thermoelektrischen Module (TEM) als Herausforderung dar. Dies macht eine Optimierung auf Systemebene unabdingbar, welche mit numerischen Methoden effizient und wirtschaftlich durchgeführt werden kann. Aufgrund der Systemkomplexität und unterschiedlichen Skalierungsebenen der Systemkomponenten wird dazu ein Multi-Layer-Multi-Scale Optimierungsansatz vorgestellt, welcher eine realitätsnahe Konzeption und Bewertung des Systems ermöglicht. Wesentliche Fragestellungen der thermomechanischen Festigkeit des Moduls, der technischen Realisierbarkeit bis hin zur Gestaltung einer systemleistungsorientierten Betriebsstrategie werden im Laufe des implementierten Prozesses mit Hinblick auf die maßgebende maximale Systemleistung adressiert und beantwortet.

Die verschiedenen Maßnahmen zur Senkung des Kraftstoffverbrauchs von dieselbetriebenen Schienenfahrzeugen sind Gegenstand der Forschung und werden in den kommenden Jahren, bedingt durch weltweit anwachsendes Transportvolumen, begrenzte Ressourcen und steigendes Umweltbewusstsein, weiter an Bedeutung zunehmen. Die Nutzung der Abgasenthalpie des Dieselmotors stellt dabei eine Möglichkeit zur Reduktion des Kraftstoffverbrauchs dar. Im Vergleich zu anderen Methoden ist der absolute Einfluss auf den Verbrauch zwar geringer, eine Kombination ist jedoch möglich und führt zu einer Verbesserung der Energieeffizienz. In dieser Arbeit wird die Möglichkeit der Abgasenthalpienutzung mittels thermoelektrischer Generatoren (TEG) betrachtet. Diese hat den Vorteil einer hohen Leistungsdichte, eines geringen Wartungsaufwands sowie einer einfachen Integration in die Topologie der exemplarisch untersuchten Lokomotive. Bei der Umsetzung sind wesentliche Randbedingungen wie die herrschenden Abgastemperaturen und -massenströme das verfügbare Einbauvolumen und der maximal zulässige Abgasgegendruck, zu beachten. Weiterhin stellt sich die thermomechanische Festigkeit der thermoelektrischen Module (TEM) als Herausforderung dar. Dies macht eine Optimierung auf Systemebene unabdingbar, welche mit numerischen Methoden effizient und wirtschaftlich durchgeführt werden kann. Aufgrund der Systemkomplexität und unterschiedlichen Skalierungsebenen der Systemkomponenten wird dazu ein Multi-Layer-Multi-Scale Optimierungsansatz vorgestellt, welcher eine realitätsnahe Konzeption und Bewertung des Systems ermöglicht. Wesentliche Fragestellungen der thermomechanischen Festigkeit des Moduls, der technischen Realisierbarkeit bis hin zur Gestaltung einer systemleistungsorientierten Betriebsstrategie werden im Laufe des implementierten Prozesses mit Hinblick auf die maßgebende maximale Systemleistung adressiert und beantwortet.

Diese Arbeit entstand an der Professur für Fahrzeugmodellierung und –simulation der TU Dresden in Zusammenarbeit mit der Fa. Bombardier Transportation („Bombardier Center of Competence“). In einem Teilprojekt dieser Kooperation wird die Einführung technischer Funktionen und Systeme zur Energieeinsparung bei Lokomotiven untersucht. Die Nutzung von Speichertechnologien ist neben der Abwärmenutzung und der energiesparenden Fahrweise die effizienteste Maßnahme zur Senkung des Kraftstoffverbrauchs bei Dieselfahrzeugen. Zusätzlich zur Rekuperation von Bremsarbeit können die Funktionen Lastpunktverschiebung und emissionsfreier Betrieb mit Hilfe eines Energiespeichers realisiert werden. Der Einsatz elektrischer Energiespeicher erweist sich als geeignet für dieselelektrische Schienenfahrzeuge im Personenverkehr, da diese durch die bereits vorhandenen elektrischen Antriebskomponenten relativ einfach zu hybridisieren sind und eine nutzungsgerechte Speicherauslegung aufgrund weitgehend bekannter Fahraufgaben möglich ist. In der Arbeit wird ein durchgängiges Verfahren zur Auslegung von dieselelektrischen Lokomotiven mit Energiespeichern im Personenverkehr beschrieben. Im Fokus liegt dabei der Einsatz von Optimierungsalgorithmen zur Verbesserung des Generatorsystems und des Einsatzes von elektrischen Energiespeichern im Hinblick auf den Kraftstoffverbrauch und die weiteren Anteile der Lebenszykluskosten. Das im Rahmen der Arbeit erstellte Programm zur energetischen Simulation bildet die Basis zur Untersuchung verschiedener Strategien für die Fahrtgestaltung unter Berücksichtigung der Fahrzeitreserven, den Betrieb des Energiespeichers und der Steuerung von Anlagen mit mehreren Dieselmotorgeneratorsätzen. Neben der Nutzung regelbasierter Strategien werden dabei auch vorausschauende Betriebsstrategien eingesetzt, welche die Möglichkeiten der bei Schienenfahrzeugen im Vorfeld bekannten Streckengeschwindigkeit und -topologie nutzen. Die dafür angewandten Methoden sind die Dynamische Programmierung nach BELLMANN und der äquivalenzkostenbasierte Betrieb. Die Optimierung der Fahrzeugkonfiguration wird durch einen Programmbaustein realisiert, welcher unter Berücksichtigung der Lokkonfiguration und der Energiesimulation für ein vorgegebenes Streckenprofil die Verbrauchs-, Instandhaltungs- und Anschaffungskosten für das Fahrzeug berechnet.