An Experimental Determination of Heat Transfer and Flow Friction Characteristics of Perforated Material for Compact Heat Exchanger Surfaces
Bannon, John M.
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The transient testing technique for the determination of heat transfer characteristics of a porous medium has been known since 1929. It requires a good deal of care and one of the important restrictions is a step change in temperature must be applied to the medium at the beginning of a test run. This thesis involves the design, test and evaluation of an experimental set-up that utilizes an "integral heater" to accomplish the step change in temperature. In addition, there is presented heat transfer and flow friction characteristics for a 20° skew matrix constructed from perforated nickel material. This data is compared to a 20° skew matrix made from stainless steel material that has been previously reported by C. P. Howard. Also, data is presented for two "parallel plate" matrices, one constructed from brass sheet, the other from perforated nickel material. A comparison of their relative performances is made.
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