Coeficiente de operación de un sistema formado por un refrigerador doméstico acoplado a un acumulador de agua caliente para la recuperación de energía

An experimental apparatus containing a domestic refrigerator coupled to a vertical hot water storage tank was used for energy recovery. The original condenser of the refrigerator was maintained, but modified with a concentric tubes heat exchanger with countercurrent water and refrigerating gas flows. The coefficient of performance for the heat pump is calculated by the ratio of energy in the heat storage and the electric power consumed by the domestic refrigerator compressor. The results show that the increasing of hydrostatic pressure in the storage tank increases the water flow rate and the coefficient of performance. The proposed device also reduces the heat dissipation to the surroundings. This is more important in small confinements found in low-cost houses.

Modelagem do escoamento e da transferência de calor ao longo de tubos capilares não adiabáticos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Análise numérica de condensadores do tipo arame-sobre-tubo usados em refrigeradores domésticos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Modelagem do escoamento transiente ao longo de trocadores de calor tubo capilar-linha de sucção

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Levantamento de coeficientes de desempenho de armazenador térmico associado a refrigerador doméstico modificado

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Portaferramentas para torneamento com refrigeração interna baseada na mudança de fase do fluido

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo das características física do filme diamante CVD para utilização em coletores solares

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Análise de um sistema de cogeração empregando turbina a gás aplicada a uma indústria de malte

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Desenvolvimento e avaliação de uma miniestação ecoeficiente de tratamento de esgoto e reuso de águas, com sistemas registrador queimador, para baixa vazões de biogás e cogeração de energia

Pós-graduação em Engenharia Mecânica - FEG

Análise experimental e desenvolvimento de um modelo numérico simplificado para um trocador de calor compacto para resfriamento de componentes eletrônicos

Pós-graduação em Engenharia Mecânica - FEIS

Análise experimental de um trocador de calor por mudança de fase e desenvolvimento de um modelo numérico simplificado

Pós-graduação em Engenharia Mecânica - FEIS

Avaliação experimental de eficiência térmica de um recuperador de calor e caldeira em um sistema de cogeração

Pós-graduação em Engenharia Mecânica - FEB

Análise crítica de um vaso de pressão do setor sucroalcooleiro

This study aims to evaluate structurally a heat exchanger that has been in operation since the mid-60's and was built COSAN for operation in one of its sugar production plants in São Paulo, this equipment as well as many similar devices are operation in plants throughout Brazil, and thus to be acquired by large corporations as in the case of COSAN, pass the scrutiny of inspection work, and work such as recalculations in the latter case in structural evaluations to verify the possible need for adjustments to project or operation and thus ensure the structural integrity of the equipment. To this were first done field survey using techniques of NDT and NDT's for determining the thickness of the main parts of the equipment, made the revaluation dimensional and existing project and considering the loads operating performing the characterization of the equipment as specified in the standard regulatory number 13 - NR13 and the other for this type of equipment and finally an analysis using a static approach, as an analysis tool using the finite element method

Dimensionamento de trocadores de calor aplicados à refrigeração da água do molde de um processo de lingotamento contínuo

This study aims to determine the most suitable type of heat exchanger to be applied to the water cooling the mold of a continuous casting process. Basically been studied four types of heat exchangers: shell and tube operating in counterflow, shell and tube operating in parallel flow, plate type and operating counterflow and plates operating in parallel flow. Initially is displayed design of heat exchangers for the conditions of the proposed application. With the heat exchangers dimensioned comparisons were made in order to set the heat exchanger more suitable for application. In the study, one comes to the conclusion that the plate type heat exchangers operating shows counterflow major advantage for this application

Comparação da eficiência térmica de trocadores de calor no laboratório de sistemas térmicos da Faculdade de Engenharia

This work aims to verify and compare the efficiency of heat exchangers used in the thermal systems laboratory at Faculdade de Engenharia do Campus de Guaratinguetá - UNESP. Basically, it has been studied two types of heat exchangers: plate type, operating in parallel flow and counter-flow, shell and tube type and also operating in parallel flow and counter flow. Initially it has been presented the didactic equipment and procedures for use of these heat exchangers in the proposed experiments. With the results obtained from the experiments, comparisons were made in order to define the behavior of the heat exchangers regarding some variables. In the study, one comes to the conclusion that the results from shell and tube type of heat exchanger, used in the thermal systems lab, are superior in all conditions analyzed