STUDI EKSPERIMENTAL PENGARUH VARIASI KETEBALAN TURBULATOR (TIPE STRAIGHT TAPE STRIP) TERHADAP KARAKTERISTIK PERPINDAHAN PANAS ALIRAN SILANG SUSUNAN SILINDER STAGGERED
Abstract: The purpose of this
research is to conduct experimental studies on the influence of variations in
the thickness of the straight tape strip type turbulator to the average convection heat
transfer coefficient, the
average Nusselt numbers,
pressure drop and the formulation
of empirical Nusselt number average on the composition of the staggered
cylinders in cross flow.The material usedis φ7/8 inches copper pipe and ± 60oC
hot air flow. Turbulator material is mica sheet with a length of 150 mm and width 5
mm, turbulator variation
thickness are 3.3, 2.6,
1.9, 1.2, 0.5
mm and without a turbulator.
Turbulator installation done symmetrically at an angle of 70o to the
direction of flow. Tests using Multi PurposeAir Duct with air flow velocity variations
of 1.0, 1.5, 2.0 and 2.5 m/s. The
results showed that
the thickening turbulator
will increase the
value of convection heat transfer
coefficient and average pressure drop. In variations of 3.3 mm thickness
showed turbulator heat
transfer coefficient of
convection largest average for
all variations of Reynolds number in the amount of 64,947.06 W/m2.K,
66,973.51, 75,156.10, and 303,222.49 W/m2K. And
the largest pressure
drop of every variations of
Reynolds number were 11.36, 22.72, 42.19
and 63.29 Pa. The experiments
resulted formulation of
empirical average Nusselt
number 69.4 4.1Pr Re 12.5 = Nu .
Keywords: Turbulator, Straight-
Tape Strip, Staggered Tube, Cross Flow, Nusselt Number, Pressure drop
Penulis: Syamsul Hadi,
Danardono
Kode Jurnal: jptmesindd090026
