Inaug.-diss.--Göttingen. / Lebenslauf.

No description available.

A. <u>Objectives</u>. After a careful consideration of the problems involved, the writer formulated the following objectives: (1) To determine the variation of lamp characteristics with life for various wave forms. (2) To determine the variation of lamp characteristics with voltage for various wave forms. (3) To attempt to correlate the variation of lamp characteristics to the crest factor of the voltage wave employed. B. <u>Equipment</u>. This investigation was performed on 100 watt, type A21 115-volt lamps manufactured by Sylvania Electric Products Inc. The following information obtained from the lamp manufacturer was used as a basis for all calculations. <u>Initial Lumens</u> 1635 <u>Initial Lumens Per Watt</u> 16.35 <u>Rated Average Hrs. Life</u> 750 The wave forms used were produced by means of a General Electric Sine Wave Generator, Model 15A224, consisting of a 10 horsepower, 3600 rpm, direct current motor directly coupled to five alternators. These alternators produced frequencies of 60, 120, 180, 300, and 420 cycles per second respectively. The output of the alternators were connected in series as desired by means of a specially designed switch board. The alternator fields were excited directly from the output of a 3 phase, half wave, 250 volt, 75 ampere, ignitron manufactured by the Westinghouse Electric Corporation. The value of the lamp intensity in foot-candles were read by means of a Western photronic cell. The photronic cell used was equipped with a visual-correction filter so that its response is closely similar to the visibility curve of the human eye. / Master of Science

The main focus of this project is to investigate the energy consumption of the manufacturing lines in the car industry and look for the potential methods regarding energy saving. Special emphasis is put on the lighting technologies that can be used in the manufacturing processes. Two lighting technologies are tested in order to see which one has better performance and lower energy consumption. Fluorescent tube and LED tube are compared concerning illuminance, UV irradiance and power consumption. Economic evaluation is also conducted to exam the feasibilities replacing fluorescent tubes with LED tubes. Results of the study show that the LED tubes have much lower energy consumption than fluorescent tubes, produce more direct and „colder“ light, and have much lower UV irradiance. However, the payback period of LED is relatively long at current price situation. Since it is expected that the price of LED tubes will decrease in future, it is reasonable to predict that the LED technology will change the fluorescent one in many applications. The energy consumption has been estimated for two manufacturing lines which use different technologies to produce car underbodies. In order to identify the differences from the energy consumption point of view, some measurements are conducted, such as the consumption of electricity, compressed air, air for ventilation and cooling water. The measured results show a disproportion in the power consumption when the lines are in stand-by mode. This affects the energy consumption per produced unit significantly. The line that has a higher capacity and a lower power consumption in the stand-by mode has a lower energy consumption per produced unit when it is operating with lower production loading. So, in order to improve the energy efficiency, it is necessary that it works at as high volume as possible and to have the stand-by power consumption as low as possible.

Also published as author's dissertation--Universität Jena, 2005. / Includes bibliographical references.

Due to the improvement of luminous efficiency, LED has been applied in general lighting nowadays. However, the efficacy and life of high power LED lamps are degraded for the problem of overheat temperature of the chips. In accordance with the above reason, the thermal management has been important in LED application. The thesis aims to analyze the thermal problem of high power LED lamp by FEM. In the beginning, we analyzed the temperature curves and thermal stress curves of chips by changing the thickness of AuSn solder in 4 structures. According to the results, the better thickness range and structures were chosen. In the second step, the effect of different sizes of a vapor chamber on the different thermal conductivities of lamp system was discussed. Finally, we orthogonalized all the designed parameters by Taguchi orthogonal array method, and then found the optimal design by comparing the results with the initial analyses. In this study, we proposed a solution to improve the quality characteristics of LED lamp by Taguchi method. So the effect of each control factors on the performance was able to be determined. For different features of demand, the present study is helpful to achieve the ideal design in manufacturing. Key words: FEM, high power LED lamps, Taguchi orthogonal array method

Bakalauro darbo tema šviečiantys interjero objektai kurie gali būti naudojami kaip šviestuvai interjeruose. Šviečiančių objektų grupė „Misterija“, susideda iš trijų, tarpusavyje harmoningai derančių, šviesą skleidžiančių objektų, kurie interjere yra pastatomi ant grindų, juos patogu pernešti, savitai perkomponuoti, taip naudotojui yra suteikiama laisvė keisti ir kurti savo interjerą. Šviestuvai pagaminti iš natūralios odos, todėl yra ne tik estetiški, bet ir ekologiški. Kūrybinių paieškų prototipas ir atspirties taškas - gėlės kalijos žiedas. Augalinis motyvas pasirinktas todėl, kad bioninių formų plastika suteikia gyvybės šiuolaikiniam statiškam išgrynintų, lakoniškų formų, minimalistiniam interjerui. . Analizuojant ir renkant su tema susietą medžiagą, didelis dėmesys buvo skirtas šiuolaikiniam dirbtiniam erdvių apšvietimui, šviesos šaltinių ir apšvietimo sistemų šiuolaikinėms nuostatoms ir naujausioms technologijoms. Analizuojama kaip šviesos šaltiniai kito ir tobulėjo istorijos eigoje, apžvelgiami pagrindiniai gyvenamųjų patalpų apšvietimo reikalavimai, apšvietimo svarba žmogui. Susisteminus visą temos medžiagą galima padaryti išvadą, jog gyvename dirbtinio apšvietimo, naujausių technologijų eroje. Kintant apšvietimo sampratai ir strategijai, keičiasi ir pati šviesos šaltinio sąvoka, todėl juo gali būti laikytinas ir toks daiktas, turintis keletą funkcijų ir galintis tarnauti kaip šviesą skleidžianti dekoratyvus objektas. Naujos šviesos... [toliau žr. visą tekstą] / Bachelor work thesis - lighting interior objects, that can be used as lamps in interior. Lighting objects in a group of "Mystery", consists of three, consistent with each other in harmony, a light- emitting objects that are placed in the interior on the floor, it is convenient to carry, composed individually, so the user is given the freedom to modify and create your own interior. Lamps made from leather, so it is not only aesthetically, but also organic. Creative search for a prototype and starting point – calla lilies flower ring. Vegetative motif was chosen because the bionic forms plastic gives some life to static purified, modern, laconic forms minimalistic interior. The analysis and collection of material associated with the topic, much attention was devoted to modern artificial lighting, light sources and lighting systems of modern attitudes and state of the art. Analyzed as other light sources and improved the course of history, an overview of the basic requirements for residential lighting, lighting is important for humans. Structured material can be any theme to the conclusion that we live in artificial light, the most recent technological era. Changing the lighting concept and strategy of changing the concept of the light source itself, so it can be considered such a thing and has several functions and can serve as a decorative object emit. New light extraction technology provides the designer much freedom of choice of materials, light... [to full text]

Thesis (M.E.)--University of Canterbury, 2009. / Typescript (photocopy). "September 2009." Includes bibliographical references (leaves [53]-58). Also available via the World Wide Web.

Thesis (M.S.)--Tennessee Technological University, 2009. / Title from title page screen (viewed on July 16, 2010). Bibliography: leaves 106-109.

Orientador: Jayme de Oliveira Campos / Banca: Eugênio Foresti / Paulo Milton Barbosa Landim / Título do folheto: O pneu chorão / Sandra Aymone 24 p. / Resumo: Alguns resíduos sólidos domiciliares podem conter substâncias químicas com características tóxicas, como os metais pesados presentes em diversos materiais provenientes de resíduos industriais pós-consumo. Como exemplo, pode-se citar as lâmpadas fluorescentes, as pilhas e as baterias, que, por possuírem metais pesados em suas composições geram um alto grau de toxicidade, bioacumulação e persistência no meio ambiente, causando preocupações ambientais e prejuízos para a saúde humana. Outro resíduo industrial pós-consumo que atualmente causa enorme prejuízo ambiental, se disposto inadequadamente, são os pneus inservíveis: ainda hoje muitas carcaças de pneus inservíveis são depositadas em cursos d'água, voçorocas ou nos terrenos baldios das cidades, fator que gera, além de outros problemas, a proliferação de larvas e mosquitos. Esta pesquisa se propôs a esclarecer qual o destino final fornecido à estes resíduos industriais pós-consumo (pilhas, baterias, lâmpadas fluorescentes e pneus inservíveis) na cidade de Rio Claro/SP. Foi adotada a metodologia de aplicação de questionários em residências previamente selecionadas e em estabelecimentos que comercializam os produtos citados e, de posse dos resultados finais, elaborou-se um modelo de gestão para a correta destinação dos produtos enfocados. / Abstract: Some solid domestic wastes may contain toxic chemicals, as the heavy metals present in several materials deriving from post-consumption industrial wastes. For instance, it can be mentioned the domestic batteries, the fluorescent lamps, which, because of the heavy metals in their composition, produce a high level of toxicity, bio-accumulation and persistence in the environment, causing prejudicial effects to the human health and the environemnt. Another post-consumption industrial waste that currently cause an enormous environmental damage, if disposed inadequately, are the worn out tires: currently, several frame-works of worm out tires are deposited in streams and rivers and erosion sites, that cause, amoung other problems, the proliferation of larvae and mosquitoes. This research purposed to clear what the final destination of the mentioned post-consumption industrial wastes (batteries, fluoescent lamps, worm out tires) in Rio Claro city, São Paulo State, Brazil. The application of questionnaires methodology in previously selected residences and stores which sell the above mentioned products was adopted and, considering the final results, a pattern of management for the correct destination of the reported products was archieved. / Mestre