An Experimental Determination of Heat Transfer and Flow Friction Characteristics of Perforated Material for Compact Heat Exchanger Surfaces
Abstract
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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