Strength Design of Toroidal Tank for LPG 3kg
| Main Author: | Lubis, Asnawi |
|---|---|
| Format: | Proceeding PeerReviewed application/pdf |
| Terbitan: |
, 2011
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| Subjects: | |
| Online Access: |
http://repository.unila.ac.id/205/1/SNTTMX2011UB_Toroidal.pdf http://repository.unila.ac.id/205/ |
Daftar Isi:
- In order to reduce the consumtion of kerosine in Indonesian household, the goverment of Indonesia initiate a program of kerosine to LPG conversion in 2007. The target of that program is to reduce the kerosine consumtion by 9.9 million kilo liters in 2012. The current design for storage tank is cylindrical shape with semi-elliptical head at both ends. However, from mechanical engineering point of view, the strength of a toroidal shape could be twice the strength of cylindrical shape as used for LPG 3kg nowadays. If the program to be continued beyond the year of 2012, the author would like to propose a change of storage tank to be in toroidal shape.. To choose the best design, the author carried out a finite element parametric study to find the limit pressure. The volume and thickness of the tank was kept constant and the radius of toroidal was varied from 2 to 10 times the cross-section radius. For every change of radius ratio, the radius of cross-section was also changed because the volume was kept constant. It was found that the best design, indicated by the highest limit pressure, was toroidal tank having radius ratio of four. To take the difficulties in manufacturing into account, the ovality was introduced in the parametric studi. The study showed that ovality maximum of 0.4 for in-plane flattening and 0.3 for out-of-plane flattening are still acceptable, indicated by the value of limit pressure above the pressure to yield.