Open AccessConvective heat transfer of nanofluids TiO2/Thermo Oil XT 32 in concentric tube heat exchanger
Author(s) -
Bekti Suroso,
Samsul Kamal,
Budi Kristiawan,
Herry Irawansyah,
Budi Wibowo,
Mohamad Yani
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/674/1/012063
Subject(s) - nanofluid , materials science , heat transfer coefficient , heat transfer , heat exchanger , volume fraction , convective heat transfer , heat transfer enhancement , concentric tube heat exchanger , thermal conductivity , tube (container) , composite material , shell and tube heat exchanger , thermodynamics , chemical engineering , nanoparticle , nanotechnology , physics , engineering
This research was conducted to examine the heat transfer characteristic of nanofluids TiO 2 /Thermo XT 32 oil on a concentric tube heat exchanger. TiO 2 nanoparticles with nominal diameter of 21 nm were dispersed in Thermo XT 32 oil as base fluid at three different particles concentration of 0.1%, 0.3%, and 0.5%, respectively. A straight horizontal stainless-steel tube of 1.2 m length, 0.012 m inner diameter, and 0.022 m outer diameter were used as a test section. Collecting data by varying the temperature of the heat transfer nanofluids and nanoparticle volume fraction. Nanofluids prepared using the method of two steps without the addition of a surfactant by using a magnetic stirrer for 1 hour then ultrasonic cleaner for 3 hours. The results of research conducted, the coefficient convection heat transfer of nanofluids TiO 2 /Thermo XT 32 oil increases along with the addition of fraction volumes; this is due to the increased thermal conductivity of the fluid as well with the rise of temperature against nanofluids TiO 2 /Thermo oil XT 32. So it is very worthy of nanofluids applied in industries related to heat transfer processes.