Late News Poster Session: Energy
Program Organizers: MS&T Administration, MS&T PCC
Tuesday 12:00 PM
October 19, 2021
Room: Exhibit Hall B
Location: Greater Columbus Convention Center
P2-9: Computational Fluid Dynamics Modeling of Enhanced Convective Heat Transfer Using Twisted Tape Insert: Kshitija Kshitjia1; Tejesh Dube1; Jian Zhang1; Jing Zhang1; 1Indiana University – Purdue University Indianapolis
In this graduate student project, a Computational Fluid Dynamics (CFD) based model was developed to simulate the heat transfer process in an enhanced forced convection heat transfer device using twisted tape inserts with wing cut. Using the CFD model, we determined an optimal design by placing twisted tape inserts with wing cuts of different twist ratios in the path of the fluid. Both the experiment and model show increased thermal performance factor and heat transfer efficiency. The model can be used as a design tool to further optimize the devices’ performance in the future.
Poster
P2-10: Correlation between Shear Strength and PU Foam Density with Respect to Aging Time in District Heating Pipe: Hyung-Gyu Kim1; Jaehoon Park1; Jooyong Kim2; Hae-Yong Lee2; Jonghun Yoon1; 1Hanyang University; 2Korea District Heating Corporation (KDHC)/Frontier Research & Training Institute
The shear strength of 0.12MPa or more and the shear strength in aged condition shall be minimum 45% of the shear strength in unaged condition, in order to determine whether the aged DH(District Heating) pipe can be used continuously based on EN253. However, in general DH pipes, it is inevitable to have an uneven distribution of shear strength because PU(Polyurethane) foam cannot be uniformly foamed during production. It was experimentally confirmed that different shear strengths were measured according to the longitudinal direction in the DH pipe, and the correlation between density and shear strength was derived by measuring the density at each location. In addition, there was little change in density after accelerated aging by applying a high temperature condition, and it was possible to predict the initial shear strength by measuring the density. This research is expected that the accuracy of the residual life prediction can be improved.