Thesis (M.S.)--University of Wisconsin-Madison. / On cover: Engineering Experiment Station. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (p. 138-140).

Thesis (M.S.)--University of Wisconsin--Madison. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 84-85).

Thesis (M.S.)--University of Wisconsin--Madison, 1980. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 171-175).

Thesis (M.S.)--Brigham Young University. Dept of Mechanical Engineering, 2007. / Includes bibliographical references (p. 112-114).

Thesis (M.S.)--Tennessee Technological University, 2009. / Title from title page screen (viewed on July 20, 2010). Bibliography: leaves 59-62.

Thesis--Wisconsin. / Vita. Includes bibliographical references (leaves 123-124).

Thesis (M.S.)--University of Wisconsin--Madison, 1983. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 73-74).

Thesis (Ph. D)--Ohio State University, 1985. / Includes bibliographical references (leaves 241-246). Available online via OhioLINK's ETD Center.

Sanitary hot water production contributes significantly to the electrical energy consumption in the university campus. An in-depth understanding of the current hot water technology, number of students, capacity of water used per student, time of use of hot water, total volume of hot water consumed and the total energy used on an average weekday in a university residence are very crucial in opting for energy efficient technology like an air source heat pump (ASHP) water heater. The study focused on quantitative and qualitative analysis of data collected for the hot water profiles in one of the university residences (Elitheini 1) from the conduction of experiment and questionnaires. The results revealed that 94% of the 75 students used hot water during the Eskom morning peak and 61% during the Eskom evening peak. In addition, the average daily energy consumption of the 12 kW Calorifier was 139.49 kWh, while the measured volume of hot water usage was 1950 L which is in strong agreement with the total volume (1945 L) of hot water consumption from the questionnaires. The p-value of the average volume of hot water usage measured by experiment and questionnaires was 0.7 and is of no mean significant difference. The monthly energy consumption for the week days was projected to be 2929.31 kWh. By retrofitting of calorifier with an ASHP unit, the energy consumption could reduce to 976.43 kWh based on its consecutive coefficient of performance of 3. Finally, from the energy consumption reduction analysis and the current Eskom tariffs, it can be alluded that the payback period of the proposedASHP unit as a retrofit to the calorifier is going to be less than 2 years and is worthy to invest into such technology under this study due to its favourable payback period and the reliability and lifespan of the ASHP unit.

Orientador: Milton Dias Junior / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica / Made available in DSpace on 2018-08-20T04:13:23Z (GMT). No. of bitstreams: 1 Siqueira_CristianoRoque_M.pdf: 6928797 bytes, checksum: ac276f05e511e74f07cdcb3e64193c84 (MD5) Previous issue date: 2012 / Resumo: Neste trabalho procurou-se avaliar o comportamento vibracional de uma bomba vertical centrífuga durante operação em campo, ou seja, nas instalações do cliente, e comparar os dados obtidos em relação ao critério de aceitação utilizado pelo fabricante através de normas vigentes. Para isto, foi necessário conhecer como é realizado o ensaio de desempenho da bomba, quais os pontos de medições determinados pelas normas, para uma melhor análise foram necessários incluir novos pontos em estudo nesta dissertação. Utilizou-se a análise de vibração em tempo, freqüência, deslocamento e velocidade. Os resultados obtidos através dos ensaios foram processados através da técnica de processamento de sinais, que melhor se adapta a análise investigada. Foram ensaiados, analisados e comentados os resultados experimentais deste trabalho. É da maior importância o estudo na formação de um critério de aceitação amplo da análise de vibração aplicado as bombas verticais centrífugas / Abstract: In this study sought to evaluate the vibrational behavior of a vertical centrifugal pump during operation in the field, that is, the customer premises, and compare the data obtained regarding the acceptance criteria used by the manufacturer using standards norms. For this, it was necessary to know how the test is performed pump performance, which points determined by measurement standards norms, for a better analysis was necessary to include new points studied in this dissertation.We used the analysis of vibration time, frequency, displacement and velocity. The results obtained from the tests were processed through the signal processing technique that best fits the analysis investigated. Were tested, analyzed and commented on the results of this experimental work. It is of utmost importance to study the formation of a broad acceptance criterion of vibration analysis applied vertical centrifugal pumps / Mestrado / Mecanica dos Sólidos e Projeto Mecanico / Mestre em Engenharia Mecânica