scholarly journals Entropic analysis of a double helical tube heat exchanger including circular depressions on both inner and outer tube

2021 ◽  
pp. 101053
Author(s):  
Yan Cao ◽  
Hamdi Ayed ◽  
Hamed Sadighi Dizaji ◽  
Mehran Hashemian ◽  
Makatar Wae-hayee
Keyword(s):  
Heat Exchanger ◽  
Outer Tube ◽  
Tube Heat Exchanger ◽  
Helical Tube

Helical tube-in-tube heat exchanger with corrugated inner tube and corrugated outer tube; experimental and numerical study

2021 ◽  
Vol 170 ◽  
pp. 107139
Author(s):  
Yan Cao ◽  
Hamdi Ayed ◽  
Ali E. Anqi ◽  
Omid Tutunchian ◽  
Hamed Sadighi Dizaji ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Numerical Study ◽  
Outer Tube ◽  
Tube Heat Exchanger ◽  
Helical Tube

scholarly journals Serangan Korosi Sumuran pada Tube Heat Exchanger di Kilang Pengolahan Minyak

2019 ◽  
Vol 8 (3) ◽  
pp. 107-114
Author(s):  
Hadi Sunandrio ◽  
Sutarjo
Keyword(s):  
Heat Exchanger ◽  
Pitting Corrosion ◽  
Visual Inspection ◽  
Outer Tube ◽  
Oil Refinery ◽  
Composition Analysis ◽  
Heat Exchanger Tube ◽  
Corrosion Attack ◽  
Tube Heat Exchanger ◽  
Exchanger Tube

Alat penukar panas (Heat Exchanger) adalah suatu alat yang berfungsi untuk menaikkan temperatur. Apabila salah satu komponen dari Heat Exchangertersebut mengalami kerusakan, maka temperatur yang diinginkan tidak akan tercapai. Salah satu dari tube heat exchanger yang ada di Kilang Pengolahan Minyak mengalami kerusakan berupa putus akibat terkorosi. Setelah dilakukan pemeriksaan dan pengujian yang meliputi : pemeriksaan visual, metalografi, uji kekerasan, analisa komposisi kimia, dan analisa EDAX. Maka diketahui bahwatube Heat Exchanger telah mengalami serangan korosi sumuran (pitting corrosion) pada permukaan dalam dan luar tube. Terjadinya serangan korosi sumuran, karena pada permukaan dalam dan luar tube terlapisi oleh deposit yang cukup tebal dan mengandung unsur-unsur Sulphur (S) dan Chlor (Cl) yang dapat memicu timbulnya serangan korosi sumuran (pitting corrosion), hingga tube mengalami penipisan di mana-mana dan putus.Kata kunci : Alat penukar panas, Tube, Endapan, Korosi sumuran, putus.AbstractHeat exchangers is a tool that serves to raise the temperature. If one component of the Heat Exchanger is damaged, then the desired temperature will not be reached. One of the tube heat exchanger that is in Oil Refinery suffered damage in the form of broken due to corroded. After examination and testing that includes visual inspection, metallography, hardness testing, chemical composition analysis, and analysis of EDAX. It is known that the tube Heat Exchanger has suffered attacks pitting corrosion on the surface of the inner and outer tube. Pitting corrosion attack, because the surface of inner and outer tube coated by a deposit that is thick and contains elements of Sulphur (S) and Chlor (Cl) which can lead to pitting corrosion attack, to experience thinning tube where everywhere and brokenKeyword : Heat exchanger, Tube, Deposit, Pitting corrosion, Broken.

1989 Max Jakob Memorial Award Lecture: Some Optimizing Examples in Forced Convective Heat Transfer

1990 ◽  
Vol 112 (2) ◽  
pp. 268-273 ◽  
Author(s):  
Y. Mori
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Chemical Vapor ◽  
Outlet Temperature ◽  
Tube Heat Exchanger ◽  
Helical Tube ◽  
Memorial Award ◽  
The Individual

Three examples are selected as representative cases concerning the basic convective heat transfer in the heat exchanger field, each of which has a specified parameter for optimizing the individual specific condition. First, the chemical vapor deposition of a silicone layer for SiH4 on the hot bottom wall of a horizontal rectangular furnace duct is discussed, assuming that a spatially uniform thickness of the layer is the optimal one. Second, the compact heat exchanger is studied with the insertion of a twisted strip in each channel so that the outlet temperature of the heated gas becomes uniform by changing the twist pitch appropriate to each channel. Third, a shell and helical tube heat exchanger is discussed for controlling flow-induced tube vibration by inserting separating plates between the tube arrays and optimizing the interval of the plates.

Experimental study of heat transfer enhancement in a helical tube heat exchanger by alumina nanofluid as current flow

2019 ◽  
Vol 55 (9) ◽  
pp. 2679-2688 ◽  
Author(s):  
Hadi Barzegari ◽  
Akram Tavakoli ◽  
Davood Jalali Vahid ◽  
Ensie Bekhradinassab
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Heat Exchanger ◽  
Heat Transfer Enhancement ◽  
Current Flow ◽  
Transfer Enhancement ◽  
Tube Heat Exchanger ◽  
Helical Tube ◽  
Alumina Nanofluid

Condensation and pressure drop characteristics of R600a in a helical tube-in-tube heat exchanger at different inclination angles

2015 ◽  
Vol 90 ◽  
pp. 571-578 ◽  
Author(s):  
M. Mozafari ◽  
M.A. Akhavan-Behabadi ◽  
H. Qobadi-Arfaee ◽  
M. Fakoor-Pakdaman
Keyword(s):  
Heat Exchanger ◽  
Pressure Drop ◽  
Tube Heat Exchanger ◽  
Helical Tube ◽  
Inclination Angles

Effect of helical diameter on the performance of shell and helical tube heat exchanger: An experimental approach

2019 ◽  
Vol 44 ◽  
pp. 691-701 ◽  
Author(s):  
M. Rahimi ◽  
M.J. Hosseini ◽  
M. Gorzin
Keyword(s):  
Heat Exchanger ◽  
Experimental Approach ◽  
Tube Heat Exchanger ◽  
Helical Tube

Numerical investigation and optimization of heat transfer and exergy loss in shell and helical tube heat exchanger

2017 ◽  
Vol 121 ◽  
pp. 294-301 ◽  
Author(s):  
Mir Majid Etghani ◽  
Seyed Amir Hosseini Baboli
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Numerical Investigation ◽  
Exergy Loss ◽  
Tube Heat Exchanger ◽  
Helical Tube
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