Development of a modified single-blow method. An Application to parallel plate heat transfer surfaces.

Abstract

An automatic heat transfer measuring system is designed and fabricated to demonstrate the usefulness of the transient heat transfer testing method. New techniques are utilized in both air-heating and air-temperature measuring systems. A computer system is incorporated to calculate the temporally and spatially averaged heat transfer coefficient using the measured disturbance and response of the fluid temperature. The present system was applied to evaluating the heat transfer performance of parallel plate stacks. The test results are compared with the existing theoretical and experimental data. It was confirmed that the present system not only has high accuracy (within 5% ) but also advantages of time and labor saving over conventional steady-state methods.