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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Concept Development of a New System for Drying Dishware : Degree project for Bachelor of Science in Innovation and Design Engineering / Konceptutveckling av ett nytt system för torkning av disk : Examensarbete inom högskoleingenjörsprogrammet innovationsteknik och design

Bergman, Ossian January 2020 (has links)
The Drying of dishware inside a dishwasher is the phase in the washing cycle that uses the most energy and is therefore the phase with most room for improvement as regards on energy usage. When drying the dishware through closed air circulation, it is the temperature of the final rinse that determines the heat available during the drying process. If heat from the final rinse is to be used more efficiently, how could such a concept of drying be developed? The project was directed as a process for product development. To gain a better understanding of the problem, the project started with a pre study which include the issues: how does drying with air work, how is drying done in today’s dishwashers, how does other industries solve this problem? The pre study is later summarized in a requirement specification, that describes what demands and wishes there are for the concept. To easier understand the big complex problem, it was branched out into smaller sub problems, with the goal of coming up with ideas for each sub problem, and later combine them into concepts using a morphological matrix. With the requirement specification as a starting point, ideas were generated for each sub problem, with the creative methods brainstorming, brainwriting and SCAMPER. The chosen solution consists of a tray combined with a system of air circulation. The tray is drawn up under the upper basket from the side of the dishwasher. It then collects the water dripping down from the dishes above, preventing the water from dripping onto the lower basket, and therefore leaving less water on the dishes below. Thereafter the tray is retracted when the water is done dripping, and the water runs off the tray, along the wall. The air circulation is then activated and directed from the top towards the bottom. This removes the leeward between the dishware and the basket that otherwise appears because the air reaches the basket first. The air circulation system is designed with the risk of flooding in mind. That resulted in a drainage system that traps all the water that manages to get inside the system and drains it back into the washing space. Further, ribs were integrated into the inlet to prevent the water from spraying straight into the system. The ribs also help spread the air where it is needed. / Torkning av disk inuti en diskmaskin är den fas som kräver mest energi, vilket innebär att torkningen är den del som innehar störst rum för förbättringar med hänsyn till energianvändning. Vid torkning av disk med en stängd luftcirkulation är det temperaturen på den sista sköljningen som avgör hur mycket värme som finns tillgängligt under torkningen. Därav gäller det att använda den effektivt, så hur kan ett koncept se ut för att använda värmen effektivare? Projektet har utförts efter en process för produktutveckling. Projektet inleddes med en förstudie för att få en bättre förståelse över problemet, som bland annat innefattar frågorna: hur torkning med luft fungerar, hur ser torkningen ut i diskmaskiner idag, hur har problemet med torkning lösts inom andra områden? Förstudien sammanfattades i en kravspecifikation som beskriver vilka krav och önskemål som finns för slutkonceptet. För att enklare förstå det problemet grenades det ut i flera delproblem, med syftet att hitta lösningar för varje delproblem och sedan koppla ihop dem till koncept genom en morfologisk matris. Med kravspecifikationen som startpunkt genererades olika lösningsalternativ fram för varje delproblem, med kreativa metoderna brainstorming, brain-writing och SCAMPER. Det valda konceptet består av en gardinlösning tillsammans med ett luftcirkulationssystem. Gardinlösningen skjuts in under övrekorgen, från sidan av diskmaskinen. Gardinen samlar där upp det vatten som rinner av den övre korgen för att hindra det från att droppa på den undre korgen. Gardinen förs ner igen när vattnet droppat klart, och det som fångats rinner av gardinen, längs väggen. Luftcirkulationen aktiveras sedan och är riktad från taket mot botten. Detta tar bort den läsida mellan korg och disklast som annars uppstår till följd av att luften når korgen först. Luftcirkulationen designades med risken för översvämning i tanken. Det ledde till ett dräneringssystem som fångar vattnet som lyckats ta sig in i systemet och leder det tillbaka in i diskutrymmet. Ytterligare monterades ribbor som förhindrar vattnet från att spruta rakt in i systemet. Ribborna hjälper också till att sprida luften dit där den behövs.
2

"Tem lamentos desses negros que foram enforcados aqui": estudo arqueológico da Praça Cipriano Barcelos (Pelotas, RS) / "There are laments of these black people who were hanged here": archaeological study of Cipriano Barcelos Square (Pelotas, RS)

Maciel, Letícia Nörnberg 31 August 2017 (has links)
Submitted by Kenia Bernini (kenia.bernini@ufpel.edu.br) on 2018-03-05T14:15:07Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Letícia_Nörnberg_Maciel_Dissertação.pdf: 5765694 bytes, checksum: 9c26fd5eaa8d86de5dfe9e67865066cd (MD5) / Approved for entry into archive by Aline Batista (alinehb.ufpel@gmail.com) on 2018-03-05T21:43:32Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Letícia_Nörnberg_Maciel_Dissertação.pdf: 5765694 bytes, checksum: 9c26fd5eaa8d86de5dfe9e67865066cd (MD5) / Approved for entry into archive by Aline Batista (alinehb.ufpel@gmail.com) on 2018-03-05T21:44:55Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Letícia_Nörnberg_Maciel_Dissertação.pdf: 5765694 bytes, checksum: 9c26fd5eaa8d86de5dfe9e67865066cd (MD5) / Made available in DSpace on 2018-03-05T21:45:12Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Letícia_Nörnberg_Maciel_Dissertação.pdf: 5765694 bytes, checksum: 9c26fd5eaa8d86de5dfe9e67865066cd (MD5) Previous issue date: 2017-08-31 / Sem bolsa / A presente dissertação discorre sobre a formação e usos da Praça Cipriano Barcelos, localizada no bairro Centro do município de Pelotas (RS). O objetivo geral foi compreender os usos atrelados à praça em questão ao longo dos dois últimos séculos por grupos social e economicamente marginalizados como escravos, ex-escravos, lavadeiras, operários, dentre outros, bem como as mudanças de ordem física que a praça sofreu nesse período. Os resultados aqui apresentados foram obtidos através de análises arqueológicas de louças e cerâmicas exumadas da praça em questão no ano de 2014, tendo sido também utilizadas fontes documentais históricas, como jornais dos séculos XIX e XX e atas da Câmara de Vereadores de Pelotas do século XIX / The present dissertation discusses the formation and uses of Cipriano Barcelos square, located in the central district of the city of Pelotas (RS). The general objective was to understand the uses linked to the square in question over the last two centuries by socially and economically marginalized groups such as slaves, ex-slaves, washerwomen, workers, among others, as well as the physical changes that the square suffered in that period. The results presented here were obtained through archaeological analyzes of ceramics and exhumed ceramics from the square in question in the year 2014, and historical documentary sources were used, such as 19th and 20th century newspapers and minutes of the 19th century Pelotas Council

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