By:Ojo Kurdi

Saziana SamatMohd Azam Mohd Adnan

Et al.

� Air compressor tank is the important equipment

� The thickness of the PMAC should be optimized to get the best performanceThe torsional stiffness is one of the most important properties

� Finite element method software was used to simulate the stress analysis of PMAC with various thickness and various shapes

� Brabin et al. [1] used finite element method to analyze and obtain elastic stress distribution at cylinder - to cylinder junction in pressurized shell structures

� Tandon et al. [2] also used finite element method to study the changes of natural frequencies of vessel due to cracks

� Anbazaghan et al. [3] developed finite element based wind and seismic design procedures for horizontal pressure vessels

� Kargarnovin et.al.[5] also designed thick-walled cylindrical vessels under internal pressure based on elasto-plastic approach

� Frantziskonis et al.[6] made a guidelines for the pressure and efficient sizing of pressure vessels for compressed air energy storage

� There are three models of PMAC that were analyzed and simulated: cylindrical pressure vessels with ellipsoidal heads, cylindrical pressure vessels with flat heads and spherical shapes

� The wall thickness is determined by consideration of the thin wall pressure vessels theory which is between 2 mm and 9 mm

� The design parameter of vessel is defined by ASME Code VIII division 1 with the following parameters:

� Internal temperature is 50°C, internal pressure is 24.131 Mpa,

� External design temperature is 50°C, external design pressure is 0.101325 Mpa,

� Maximum diameter is 150 mm and vessel length, tangent to tangent is 450 mm.

� The element shape is tetrahedral and element type is 3D stress

� Boundary condition is fixed at certain reference point in the vessels

Figure 1. PMAC Models

Figure 2. Von Misses Stress of cylindrical vessel with ellipsoidal heads for 9 mm wall thickness

Figure 3. Von Misses stress of three vessel models in various thickness compared to ultimate tensile strength

� Optimization of the wall thickness of PMAC has been done by using finite element method

� The results show that the optimum wall thickness of cylindrical vessel with ellipsoidal and of spherical vessel is 8 mm and 9 mm, respectively

� The results will be validated by experiment method which is the main objective of our future direction

� The authors would like to thank the UniversitiSelangor (UNISEL) that has give of sponsorship through UNISEL BESTARI GRANT (GPB-UNISEL-13/ST-0001)

� Our gratitude also goes to the CSM Laboratory and Vibration Laboratory, Faculty of Mechanical Engineering, UniversitiTeknologi Malaysia for providing facility and software package

� [1] T. Aseer Brabin, T. Christopher, B. Nageswara Rao, Finite element analysis of cylindrical pressure vessels having a misalignment in a circumferential joint, International Journal of Pressure Vessels and Piping 87 (2010) 197 - 201.

� [2] A. Choubey, D.K. Sehgal, N. Tandon, Finite element analysis of vessels to study changes in natural frequencies due to cracks, International Journal of Pressure Vessels and Piping 83 (2006) 181–187.

� [3] A. M. Senthil Anbazaghan, M. Dev Anand, G. Anis Milton, Development of Finite Element Based Wind and Design Procedures for Horizontal Pressure Vessel, Procedia Engineering 38 (2012) 3998 - 4004.

� [4] M.H. Kargarnovin, A. Rezai Zarei, H. Darijani, Wall thickness optimization of thick-walled spherical vessel using thermo-elasto-plastic concept, International Journal of Pressure Vessels and Piping 82 (2005) 379–385.

� [5] H. Darijani, M.H. Kargarnovin, R. Naghdabadi, Design of thick-walled cylindrical vessels under internal pressure based on elasto-plastic approach, Materials and Design 30 (2009) 3537–3544.

� [6] J.J. Proczka, K. Muralidharan, D. Villela, J.H. Simmons, G. Frantziskonis, Guidelines for the pressure and efficient sizing of pressure vessels for compressed air energy storage, Energy Conversion and Management 65 (2013) 597–605..