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ITS » Paper and Presentation » Rekayasa Konversi Energi - S2 Posted by dee@its.ac.id at 29/01/2015 23:35:28 • 1353 Views
NUMERICAL STUDY CHARACTERISTICS OF FLOW AND HEAT TRANSFER CROSS-FLOW STAGGERED TUBE ARRANGEMENT USING VARIATIONS TRANVERSE DAN LONGITUDINAL FITCH
Author : YUSUF ( 2110202201 )
ABSTRAK
Karakteristik aliran dan perpindahan panas fluida terhadap silinder sirkular
dengan pola tertentu sering digunakan dalam berbagai cabang teknologi modern
saat ini. Aplikasi praktisnya banyak digunakan pada dunia industri seperti
menentukan desain susunan tube atau pipa pada sistem alat penukar panas heat
exchangers refrigeration dan air conditioner cooling towerchemical process
electronic cooling struktur pelindung jaringan kabel dsb. Besarnya nilai heat
transfer saat aliran fluida melintasi silinder sirkular yang ditunjukkan dengan
parameter Nusselt number baik itu Nusselt number lokal Nu1060 maupun Nusselt
number rata-rata.
Perpindahan panas forced convection pada silinder sirkular tipe staggered
menggunakan 3 variasi bilangan Reynolds ReD yaitu 80 200 5000 sedangkan
transverse pitch 15D 2D dan longitudinal pitch 15D 2D. Temperatur inlet
fluida masuk shell 350 oK dan temperatur tube 300 oK dimodelkan dengan
Gambit 2.4.6 dan disimulasikan menggunakan Fluent 6.3.26 dengan model
turbulen k- SST 2D steady-Flow untuk memperoleh data yang berhubungan
dengan profile kecepatan dan distribusi temperatur.
Dari hasil simulasi ini didapatkan visualisasi kontur kecepatan temperatur
dan distribusi Nusselt number. Terjadi peningkatan perpindahan panas dengan
menurunnya tranverse picth ST dan longitudinal pitch SL. Pada ReD 200
terjadi penurunan nilai Nusselt number rata-rata di row ketiga dan keempat
sedangkan pada ReD 5000 nilai Nusselt number rata-rata pada row kedua ketiga
dan keempat terus mengalami peningkatan.
ABSTRACT
The characteristic of fluid flow and heat transfer on a circular cylinder
with particular pattern is frequently used in various branches of modern
technology today. The practical application is extensively used in the world of
industry such as to determine tube structure design on system of heat exchangers
refrigeration air conditioner cooling tower chemical process electronic cooling
protector structure of cable network etc. The amount of heat transfer when fluid
cureent passes through circular cylinder is expressed by Nusselt number
parameter eiter local Nusselt number Nu1060 or average Nusselt number.
Forced convection heat transfer on the circular cylinder with a staggeredtype
of using 3 Reynolds number ReD varied as the value of 80 200 5000
while the tranverse pitch 1.5D 2D and longitudinal pitch 1.5D 2D. The fluid
inlet temperature entering shell is 350 oK and the tube temperature is 300 oK
which is modeled whith Gambit 2.4.6 and simulated using Fluent 6.3.26 whith
turbulent model k- SST 2D steady-flow to obtain data related to the velocity
profile and temperature distribution.
From the simulation results obtained visualization contour of velocity
temperature and Nusselt number distribution. An increase in heat transfer with
decreasing tranverse pitch ST and longitudinal pitch SL. At ReD 200 a decline
in the value of the average Nusselt number in the third row and fourth grades
while at ReD 5000 the average Nusselt number in the second row third and fourth
constantly increasing.
Keywords:
Perpindahan Panas; Silinder Sirkular; tranverse; longitudinal; Staggered
dan Tube Bank.
Subject
: Transmisi panas
Contributor
Prof. DR. Eng. Ir. Prabowo, M. Eng
Date Create
: 01/03/2014
Type
: Text
Format
: pdf
Language
: Indonesian
Identifier
: ITS-paper-21103140000954
Collection ID
: 21103140000954
Call Number
: RTM 621.402 2 Yus s
Source Paper and Presentationof Mechanical Engineering, RTM 621.402 2 Yus s, 2015
Coverage ITS Community
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