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Energy evaluation of an evaporative cooling system using water driven ejector Ciênc. Tecnol. Aliment.
Oliveira,Cíntia Carla Melgaço de; Gutierrez,Mirko Chavez; Silveira Junior,Vivaldo.
The search for efficient and accessible cooling systems has increased worldwide. This study aims to build and evaluate an evaporative cooling system using a water driven ejector, allowing it to be installed in places with plenty of water. The system was investigated varying the flow rate and temperature of the circulating water, temperature of the replacement water, and coefficient of performance. The best vacuum obtained was 8.5 kPa at nominal operating conditions of 4.1 ± 0.1 m³/h and 5 ± 0.5 ºC for the circulating water reaching the temperature of 9.7 ± 0.5 ºC. The pulse-like disturbance generated by replacing the cooling water at different periods of times did not result in significant affect vacuum destabilization and the temperature rise in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Thermal storage; Evaporative cooling; Ejector.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612014000200029
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MODELING AND TESTING OF AN ICE BANK FOR MILK COOLING AFTER MILKING REA
Jordan,Rodrigo A.; Cortez,Luís A. B.; Silveira Jr.,Vivaldo; Cavalcanti- Mata,Mário E. R. M.; Oliveira,Fellipe D. de.
ABSTRACT Based on mass and energy balance equations and data collected in specialized bibliographies, it was proposed a methodology for modeling of an ice bank for thermal storage of energy at low temperature to be used in milk cooling. The data obtained by the equations arrangement were used in the design and installation of a real system, which was tested to collect data and to compare it with the estimated. The data obtained in terms of prediction of ice formation, temperature of the ice bank, water and capacity of the selected refrigeration system prove the adequacy of the equations arrangement, showing that it can be used as a tool for sizing solid ice bank in smooth pipe coils, with good approximation.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Milk cooling; Modeling; Thermal storage.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000400510
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