Thesis (M. Eng. Sc.)--University of Adelaide, Dept. of Chemical Engineering, 1986. / Includes bibliographical references (leaves 276-279).

Thesis (doctoral)--Helsinki University of Technology, 2002. / Includes bibliographical references. Also available on the World Wide Web.

Thesis (M.Sc.)--University of Hong Kong, 2002. / Includes bibliographical references. Also available in print.

Thesis (M.Sc.)--Aberdeen University, 2009. / Title from web page (viewed on July 29, 2009). Includes bibliographical references.

Thesis (Ph. D.)--University of Texas at Austin, 2006. / Vita. Includes bibliographical references.

Resumo: Neste estudo são apresentados os resultados de um trabalho realizado em uma bancada de testes, onde se constatou a diferença de potência elétrica de acionamento e do coeficiente de performance no funcionamento de dois diferentes tipos de compressores: um hermético a pistão e outro rotativo do tipo scroll, operando com inversor de frequência. No estudo variou-se a vazão do fluido refrigerante, e consequentemente o efeito frigorífico, por dois procedimentos distintos: restrição da passagem do refrigerante através de uma válvula de estrangulamento, mantendo-se a rotação do compressor a pistão constante, e por meio de variação de rotação do compressor scroll com aplicação de um inversor de frequência, mantendo-se a válvula de estrangulamento em uma posição fixa. Observou-se também a influência do inversor de frequência no controle da vazão de ar do sistema através de um conjunto motor-ventilador axial. Esse controle ora era realizado por uma válvula de controle "DAMPER", ora por meio da rotação do motor através do emprego do inversor de frequência, com o qual foi possível economizar até 87 % de potência elétrica requerida pelo ventilador. O estudo ainda demonstrou que existe uma faixa de trabalho na qual o inversor de frequência é capaz de economizar até 56 % da potência exigida pelo compressor para uma mesma carga térmica em relação ao compressor desprovido do inversor de frequência, no qual o controle da vazão de refrigerante ocorre através da válvula de estrangulamento. Conclui-se que a utilização do inversor de frequência, em sistemas onde a carga térmica requerida (efeito refrigerante) varia, pode resultar em uma significante economia de energia. / Abstract: This study presents the results of a work carried out on a test bench, where it was verified the difference of the electrical startup power and the performance coefficient of two different types of compressors, namely: a hermetic piston type compressor and a rotating scroll type compressor operating with a frequency inverter. In this study, the refrigerant flow rate was varied and, consequently, the cooling capacity obtained by two distinct procedures: one, by the restriction of the refrigerating flow while maintaining rotation of the piston compressor constant and the other, by varying the scroll compressor rotation through a frequency inverter while keeping the restrictive valve in a fixed position. Is showed also, the influence of frequency inverter in order to control the air flow rate system by employed with fan engine and afterwards compare with method which air flow rate is controlled by DAMPER valve, where until 87 % to fan actuation power was saved. Besides, the study demonstrated that there is a range where the frequency inverter is capable of savings up to 56% of the compressor demanding power for a defined cooling capacity in relation to a compressor without the frequency inverter, in which the refrigerating flow rate control occurs through the restrictive valve. Therefore, it is conclusive that the use of frequency inverters in systems where the required cooling capacity varies, it can result in an appreciated economy of energy. / Orientador: Pedro Magalhães Sobrinho / Coorientador: Teófilo Miguel de Souza / Banca: Agnelo Marotta Cassula / Banca: José Rui Camargo / Mestre

No description available.

Aim diploma thesis is design and dimensioning central air - conditioning system of offices in industrial object. To air - conditioning was choose 2nd floor office building. Introduction is devoted short entrance to the areas air - conditioning and survey used air - conditioner systems inclusive basic types and possibility using single air - conditioning system practically. Follows computational part, in which is effected heat loss calculation, summer heat gains air - conditioned object and psychrometr calculation summer and winter operationing air - conditioning system. After calculation needed parameters is effected design distribution air, machine - room air conditioning, dimensioning air channels and ventilators, design incoming and off-take anemostats and their regulations. Next part includes calculation power consumption during the operationing designed air - conditioning system.

RIEGER, L.: Air conditioning of offices in administrative building The main contents of the thesis completed in the master's programme of the field M-TEP is to make a design of air-conditioning system of the offices on one floor of the office building, using dispositions according to the provided documentation. The theoretical part which deals with air-conditioning systems, devices and their constituent parts is followed by calculation chapters in which object properties are defined as heat loss, heat gain and the need for ventilation air. A proposal of air-conditioning system comprising psychrometric calculations, dimensioning of air distribution sizing, design of machine room and air-conditioner itself follows. The computational solution is supplemented by drawing documentation and specification of materials.

Thesis: B.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1980 / Bibliography: leaf 38. / by Eugenie Hainsworth. / B.S. / B.S. Massachusetts Institute of Technology, Department of Mechanical Engineering