Open AccessHeat Transfer Analysis on the Tube Type Heat Exchanger with Fin Pitch Variations
Author(s) -
Ahmad Syuhada,
Dedi Afandi,
Sarwo Edhy Sofyan
Publication year - 2020
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/931/1/012017
Subject(s) - concentric tube heat exchanger , plate fin heat exchanger , plate heat exchanger , shell and tube heat exchanger , materials science , heat spreader , heat exchanger , heat transfer coefficient , micro heat exchanger , fin , heat transfer , baffle , convective heat transfer , thermodynamics , dynamic scraped surface heat exchanger , ntu method , annular fin , mechanics , composite material , critical heat flux , physics
A heat exchanger is a device usually used to dissipate the heat generated during the mechanical processes. To improve the performance of the heat exchanger, a lot of research has been conducted including the addition of fins on the outer surface. This experimental study examines the heat transfer process on the outer surface of the heat exchanger. The heat exchanger was made of galvanized pipes with an inner and outer diameter of 20 mm and 22 mm. The heat exchanger has a pass length of 30 cm, the spacing between the tube of 6 cm and a total length of 6 m. The spiral fin made of an aluminum plate is mounted to the outer surface of the tube pipe of the heat exchanger. It has a thickness of 0.3 mm. The fin pitch of the heat exchangers was varied to 3 cm, 5 cm, and 7 cm. The heat exchanger was fed with hot water at a constant temperature of 80 °C and a flow rate of 0.4 L/s. While, the ambient air was blown at the outer surface of the heat exchanger at three different speeds namely 2.4 m/s, 2.8 m/s, and 3.4 m/s. It is found that the highest convective heat transfer rate and convective heat transfer coefficient are yielded by the heat exchanger with a fin pitch of 3 cm namely, 6607.2 W and 235.8 W/m 2 K, respectively.