Orientador: Jose Antonio Siqueira Dias / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação / Made available in DSpace on 2018-08-14T11:25:46Z (GMT). No. of bitstreams: 1 Ormenese_Marcela.pdf: 17981897 bytes, checksum: c7b7714358950bc575686565e846f762 (MD5) Previous issue date: 2009 / Resumo: Os sistemas de aquecimento solar disponíveis comercialmente, embora proporcionem boa economia de energia elétrica, não apresentam bom desempenho em dias com baixa radiação, pois o boiler é automaticamente preenchido com água fria toda vez que ocorre consumo de água quente. Neste trabalho é proposto e estudado um sistema de aquecimento solar que é otimizado para proporcionar uma mínima utilização da energia elétrica no auxílio ao aquecimento de água. Um controlador fuzzy analisa a intensidade da radiação solar, a temperatura da água dentro do boiler, a quantidade de água dentro do boiler e controla a entrada de água fria no boiler, otimizando o sistema. Foram modelados dois sistemas de aquecimento: um convencional e este sistema com o controlador fuzzy; e, através de simulações, suas eficiências foram comparadas. Os resultados obtidos em simulação mostram que o sistema proposto com controlador fuzzy apresenta eficiência superior aos sistemas convencionais. Para um período de três dias de inverno, com baixa radiação solar, o sistema convencional consumiu uma energia elétrica de 10,08 kWh enquanto que o sistema proposto consumiu apenas 1,86 kWh. / Abstract: Although significant savings in electrical energy are achieved with commercially available solar water heaters, they do not present a good performance in days that the radiation is not good, because the boiler is filled with cold water whenever the hot water is used. In this work, a new solar heating system, which minimizes the use of electrical energy, is proposed. The proposed system uses a fuzzy controller that analyzes the intensity of solar radiation, the temperature of the water inside the boiler and the volume of water inside the boiler, to actuate on a On/Off valve which controls the boiler's input of cold water. Two solar heating systems were modeled: a conventional system and the new proposed system with the fuzzy controller; and their efficiencies were compared using computer simulations. The obtained results show that the proposed system with the fuzzy controller presents a much higher performance when compared to the traditional system. Simulation results indicate that for a three winter days period, with low intensity solar radiation, the conventional system consumed 10.08 kwh of electrical energy while the proposed system needed only 1.86 kwh to achieve the same performance. / Universidade Estadual de Campi / Eletrônica, Microeletrônica e Optoeletrônica / Mestre em Engenharia Elétrica

The following thesis examine the former homes of Charlotte Berlin and Wilhelmina von Hallwyl, two women who in the turn of 20th century donated their homes and collections to be museums. The purpose of this essay is to examine how Charlotte Berlin’s Museum and the Hallwyl museum work with musealization and authenticity.Both Charlotte and Wilhelmina lived their life in a changing time, where emigration, industrialization and urbanization took place. They are both women from the upper-middle class but with differences such as economic ones which has an effect of the collection and the size of their homes. Further distinctions between them is that Wilhelmina was married and Charlotte was not. Wilhelmina lived in the capital of Sweden, Charlotte in the small town called Ystad. Their similarities is found in their collections of clocks, clothes, paintings and books but most of all in their determination to make their homes museums once they were gone. They sought to make sure that their changing time could be seen through their collection. By examine how this is visible in the rooms they left 137behind, it is possible to see the relationship between the props and the authentic objects. The signs of it now being a museum, as cordons and glass stands, collaborates with the presence of the former inhabitants as well as movemements, seen through objects like chairs placed slightly obliquely. This essay also establish a new term called affective authenticity, which describe and develop the sensation of the past, the relation between the imagi-nation and the reality and the connection between people, objects and the milieu, with the importance that every-thing does not have to be all authentic, but has to mediate it. This is a two year’s master thesis in Museum and Cultural Heritage Studies.

The diploma thesis studies the elaboration of project about optimization of solar system for all- season service. The aim of the work was to make a proportioning, choosing the right parts and finding the economic and ecologic balance.

This thesis is dealing with the usage of solar energy for cooling and air-conditioning. Notification of the quantity of solar power which incidents to the Earth, types of solar power collector and discribes systems which are applicable for cooling and air-conditioning. Next part deal with calculation and proposal of combined system for warming-up domestic hot water, heating a bit more and cooling. In the last part I solve the capital expenditure and system´s economic return.

Main purpose of project is design of economical ventilation system. Designed preasure equal air heating system is supportet by sollar collectors and fluid-ground heat exchanger.

L’histoire des collections est une thématique majeure de la muséologie, toutefois, force est de constater que malgré l’inventaire des collections océaniennes réalisé dans les années 1980, la constitution des fonds régionaux est méconnue. Le passé mouvementé des inventaires et de la gestion des collections explique la perte des données. Objets sans numéro, étiquettes orphelines, multiplication des numérotations successives, etc. sont des plaies bien connues des conservateurs et responsables des collections. Mais peut-on vraiment exposer un artefact pour lui-même ? N’est-il pas important d’envisager son histoire et l’origine de sa présence dans l’institution pour mieux le présenter ? Notre objectif est donc de retracer, au travers des archives, le parcours de ces objets depuis l’Océanie jusque dans les musées du Nord et du Pas-de-Calais. Ce focus régional s’explique par la richesse du fonds océanien. Nous nous sommes part iculièrement penchée sur les contributeurs – les donateurs et vendeurs – dont l’action, liée à des phénomènes de sociabilités notariales, est indissociable de l’histoire de ces artefacts. Notre but est de révéler la façon dont ces objets ont intégré les établissements, leur réception non seulement par les membres des administrations muséales mais aussi par le public, ainsi que les procédés mis en œuvre pour exposer ces artefacts. Deux établissements dominent largement notre ouvrage, les musées de Boulogne-sur-Mer et celui de la Chartreuse de Douai. La profusion de la documentation conservée, ainsi que le destin tragique du second, explique cette prééminence. Les autres institutions concernées sont le musée de l’Hôtel Sandelin de Saint-Omer, le musée de Beaux-Arts de Dunkerque et le Muséum d’Histoire Naturelle de Lille. Notre étude se concentre particulièrement sur le XIXe siècle, depuis la création du premier musée en 1825 à Boulogne-sur-Mer. / The history of the collections has been a main focus in the Museum Studies since the late 20th century. However, despite having been inventoried in the 1980s, the past of pacific collections is still mainly undiscovered, the process of their incorporation into the museum unkown. It is mostly due to the eventful history of inventories and collection managments. Museum curators often encounter objects unumbered, labels unconnected to any artifact, several numbers for the same object... But is displaying an object detached from any historical background a viable option ? Or should we always consider its history and the way it became a museum piece ? Our goal is to relate the pacific collections past, looking through the archives, unraveling the steps these artifacts took from the Pacific to Northern France. The diversity and profusion of pacific material in the North and Pas-de-Calais departments account for our regional focus. Our main point of interest is the collectors and donators, men and women who took part to the history of the artifacts, in the contexte of the notable socialibity. We highlight the way these objects came to enter the inventory of the museum, the way they were perceived by the administrations and the public, but also the way they were displayed. The two main institutions in our study are the Museums of Boulogne-sur-Mer and Douai. Both are rich in archives material and the tragic destiny of the second warrant this pre- eminence. The Hôtel Sandelin of Saint-Omer, Dunkerque Fine Arts and Lille Natural History Museums are the three other study cases presented in our thesis. Our time frame is mainly set on the 19th century, with a starting point at the creation of the first institution, the Boulogne- sur-Mer Museum.

Klimatet och samhället förändras hela tiden och medvetenheten för konsekvenserna ökar. Genom att utnyttja alla tillgängliga delar i en energieffektivisering blir det möjligt att minska den tillförda energin till fastigheten. Detta arbete kommer belysa den potentiella energin i solen som kan utnyttjas för att värma upp fastigheter och andra resurser som har ett värmebehov. Rapporten kommer titta på hur solfångare kan bidra med värmeenergi till Hedlunda förskola. Med hjälp av beräkningar kommer lutningen på solfångarna visa vilka skillnader som framkommer gällande energimängd samt när energin går att nyttja. För att kunna besvara syftet med projektet kommer tre frågeställningar besvaras:  ·       Är det möjligt att minska energibehovet med 2,5 kWh/m2 med hjälp av solfångare? ·       Är det ekonomiskt lönsamt att använda solfångare för att minska energibehovet? ·       Hur löser man ett eventuellt problem med överhettning när energin inte utnyttjas under sommaren? Den metod som har använts för att undersöka solfångarnas tillförda energi är främst via beräkningar i Excel. För att få en ökad förståelse har litteraturstudier och informativa webbplatser använts. Avslutningsvis så visade resultatet att det är fullt möjligt att minska energibehovet årligen med 2,5 kWh/m2 eller 4 625 kWh totalt med solfångare.  Det framkommer att det inte är ekonomiskt lönsamt att använda sig av solfångare i den undersökta fastigheten. Detta beror till stor del på att den nuvarande uppvärmningen uppnås med relativt billig fjärrvärme. Att fjärrvärmen dessutom är billigast under sommaren då solfångarna är mest produktiva försvårar lönsamheten ytterligare. Det finns ett antal tekniska lösningar som gör det möjligt att undvika överhettning och kokning i systemet vilket möjliggör för en installation av solfångare. Sammanfattningsvis är det möjligt att använda sig av solfångare för att komma ner till energinivåer för ett internationellt certifierat passivhus. Solfångare kan vara intressant för Umeå Kommun trots att det inte är ekonomiskt lönsamt. En installation av solfångare kan ge Umeå Kommun mer kunskap om hur solfångare fungerar i praktiken samt vara ett budskap att man satsar på innovativitet och framtiden. / The climate and society are constantly changing, and awareness of the consequences of both is increasing. By utilizing energy efficient solutions, it will be possible to reduce the energy supplied to the system. This work will highlight the potential energy in the sunlight that can be used to heat structures and other facilities that have a heating demand. The report will look at how solar collectors can contribute thermal energy to Hedlunda preschool. By means of various calculations, the tilt angle of the solar collectors will show what differences appear in the current amount of energy and when the energy can be used. To fulfill the purpose of the project, three questions will be answered: ·        Is it possible to reduce the energy demand by 2.5 kWh/m2 with the help of solar collectors? ·        Is it economically profitable to use solar collectors to reduce external energy demand? ·        How do you solve a possible problem with overheating when the energy is not used during summer?  The method that has been used to investigate the solar energy supply is primarily calculations in Excel. To gain a better understanding, literature studies and informational websites have been used. In conclusion, the results showed that it is quite possible to reduce the yearly energy demand by 2.5 kWh/m2 living space or 4,625 kWh total with solar collectors. However, using solar panels in the investigated property is not financially profitable. This is largely because the heating is currently managed by a cheap district heating. Furthermore, the fact that district heating is at its cheapest during summer when solar collectors are most productive further complicates profitability. There are several technical solutions that make it possible to avoid overheating and boiling in the system, which allows for the installation of solar panels. In summary, it is possible to use solar collectors to reduce energy levels to an international certified passive house standard. Solar collectors can be interesting for Umeå Kommun even though it is not financially profitable. An installation of solar collectors can give Umeå Kommun more knowledge about how solar collectors work in practice and be a message that they are investing in innovation and the future.

The study sets out to review various literatures concerning photovoltaic/thermal (PVT) modules for the extraction of electricity and heat, it also reviews different PVT collectors as well as their performance. The study provides an understanding of a system that fully supports ecological society by promoting the use of solar modules from a different scope in future global resolutions. Furthermore, it looks into renewable energy in Sweden, solar energy and PVT systems, operational principles of hybrid PVT collectors, PVT applications, PVT market and legal face of PVT in Sweden among others. Among other social benefits, PVT system contributes enormously to energy savings and energy consumption which in turn lowers CO2 emissions. The review shows that PVT modules can provide homes and industries with 100% renewable electricity and heat that is affordable. This paper adopts systematic literature review, as it allows thorough cross-examination of various publications regarding the subject.

The main task of the master project is to design a new energy efficient municipal house in Drnholec. The building has two above-ground floors and partial basement. It has a two-part flat roof. One part is green, the other has the bituminous roofing. The basement contains storage spaces and a boiler room. The ground floor contains an entrance hall, toilets, restaurant, a kitchen with storage and a hall with elevated stage. The first floor contains two club rooms, toilets and a room for the air conditioning system. The vertical load-bearing structures are designed from ceramic walls. Internal walls are designed from ceramic blocks. The horizontal load-bearing structures are designed from the pre-stressed Spiroll panels. The building envelope is insulated with mineral wool. The second part of the master project focuses on designing HVAC, lighting and sewage (including stormwater storage basin). The building utilizes an automatic biomass boiler as the main heating energy source. The summer domestic water heating is supported by photovoltaics. The third part of the master project assesses and compares heating of water by photovoltaics and solar thermal collectors. The project was carried out in the AutoCAD, DEKSOFT, Excel and Word.

No description available.