Darmawan, Steven and Tanujaya, Harto (2021) Investigation of Flow of the Disc-and-Doughnut Baffles and 40% Cut Segmental Baffles. International Journal of Heat and Technology, 39 (5). pp. 1541-1548.
Preview |
Other (Artikel)
INVEST~1.PDF Download (1MB) | Preview |
Preview |
Other (Turnitin)
TURNIT~1.PDF Download (2MB) | Preview |
Abstract
Heat exchanger is usually used in manufacturing process. At present, many researchers
have efforts to increase the performance of the heat exchanger with less of the cost. This
research discussed about the performance of heat exchanger using 40% cut segmental
baffles compared with modified double segmental baffles disc-and-doughnut type. In this
study, the investigation of the computational results consisted of heat flux, velocity profile
along the heat exchanger, pressure distribution and, theoretical heat transfer coefficient and
heat exchanger effectiveness. The model was calculated using finite difference method
forward modeling with Multiphysics Software and focuses on the performance evaluation
of the small shell-and-tube heat exchanger (STHE) – laboratory type. The tubes are
composed of 14 tubes with 0.583 m length, triangular 30°rotated pitch. The pipe radius of
shell and tube are 0.055 m and 0.00635 m, respectively. The baffle radius of disc and
doughnut are 0.055 m and 0.025 m, respectively, and the baffle radius of 40% cut
segmental baffles are 0.055 m. Both types of the baffle have a distance of 0.116 m which
is evenly distributed along the shell. The generalized minimal residual (GMRES) method
for the fluid flow case used as an iterative method for solving some of the complex linear
equations shows good performance as in reliability and validity. For the 40% cut segmental
baffles, fluid flow makes a zigzag pattern, an Eddy or swirling of a fluid, and there was
some back mixing of fluid stream which caused several dead zones along the shell. The
occurrence of the dead zones caused the heat transfer to be ineffective and gave lower value
compared to the double segmental disc-and-doughnut baffles. The 40% cut segmental
baffles was also seen to have a higher pressure at the outlet region than the double
segmental disc-and-doughnut baffles. The disc-and-doughnut baffles leads to a turbulent
fluid flow which causes an increase in heat transfer characteristics and also lower pressure
drop than the 40% cut segmental baffles. Based on the theoretical, both types of disc-and-
doughnut baffles and the 40% cut segmental baffles of heat exchanger investigated have
highest effectiveness at the lowest mass flow rate of the hot fluids (tub
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | heat exchanger, STHE, segmental baffles, disc-and-doughnut, effectiveness |
| Subjects: | Artikel |
| Divisions: | Fakultas Teknik > Teknik Mesin |
| Depositing User: | Puskom untar untar |
| Date Deposited: | 10 Apr 2023 00:42 |
| Last Modified: | 10 Apr 2023 00:42 |
| URI: | http://untar.idwordpres.com/id/eprint/39280 |
Actions (login required)
 |
View Item |