Cooling analysis of self Activating Bi-Metallic Valve using Thermo –Structural Coupled FEA
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2013, Vol 3, Issue 6
Abstract
To replace electronically actuated valves or to provide second layer of safety in case of electronic alfunction a totally mechanically actuated valve & warning system is designed. The process for which valve optimization is carried out is the process of nitrousoxide generation from ammonium nitrate. The main challenge in the process was maintaining temperatures below 200◦C as above this temp ammonium nitrate becomes explosive & safety risks are involved. The secondary objective was to maintain this temperature above 170◦C as below this temperature reaction does not proceed. All these objectives are fulfilled by employing a bimetallic valve .The primary purpose of the self actuation is achieved by selecting proper dimensions of the valve & designing warning system in which desirable deflection of the bimetallic strip is achieved. But main problem arises during cooling as there is the possibility of the bimetallic strip of may lead to highcrushing stresses. The main requirement while carrying out cooling is that the bimetallic strip should again rest on the flow casing as previous i.e. it should close valve again while cooling & not crush on the flow casing or deflects beyond flow casing.
Authors and Affiliations
Swati Paithankar
Keywords
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