Transferencia de calor em um regenerador rotativo com perda de carga estabelecida nos dutos da matriz / Heat transfer in a rotary regenerator with fixed pressure drop

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Heat transfer from a rotary regenerator subject to constant pressure drop constraints was examined. The optimal porosity and the corresponding maximum heat transfer were obtained considering smooth and equilateral triangular matrix ducts. The fluid flow and the heat transfer coefficient were obtained from correlations taking into account the matrix ducts entrance region. These results were used as inputs to a numerical solution employed to evaluate the regenerator thermal performance. The influence of flow partial blockage, caused by part of the equipment structure, and the effects of seal leakage on the heat transfer were also investigated. A scale analysis was conducted and equations to assess the optimal porosity and the maximum heat transfer were obtained. Based on this analysis, dimensionless parameters were introduced and it was verified that the scale analysis properly predicts the order of magnitude of the optimal porosity and the maximum heat transfer. Finally, a dimensionless formulation was suggested and the influence of matrix rotational speed was analyzed

ASSUNTO(S)

permutadores termicos energy transfer calor - transmissão heat transfer heat exchangers energia - transferência

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