This study carried out an analytic study of a plate oil cooler made for a 1000cc class gasoline engine. The One-layer model and the Full model of the plate oil cooler were analyzed, and the results were compared. The results showed an average 4.7% error in the heat transfer rate under the conditions of analyses, and revealed overall tendencies that were similar to each other. The difference in pressure drop between the two models appeared to increase in accordance with increase in flow rate, and was attributed to the difference in total pressure and inlet velocity distribution. Internal cross-sections of the two models were compared, and a similar distribution to the overall internal flows was found, except for those of the inlet and outlet. It was thus concluded that a One-layer analysis of the model would allow the tendency of the heat transfer rate to be predicted however, analysis of the Full model would enable closer analyses of the flow and heat transfer characteristics.

heat exchanger, heat transfer rate, oil cooler, internal flow, uniformity.