Plates design analysis

The relative merits of the plate column and packed column for a specified purpose are properly determined only by comparison of the actual cost figures resulting fi om a detailed design analysis for each type. Most conditions being equal, packed columns in the smaller sizes (diameters up to approximately 2-3 ft) are on the average less expensive. In the larger sizes, plate columns tend to be the more economical. 

Cooper, J.S. Design analysis of PEMFC bipolar plates considering stack manufacturing and environment impact. J. Power Sources 2004, 129 (2), 152-169. 

Design analysis is required to convert applied loads and other external constraints into stress and strain distributions within the product, and to calculate associated deformations. The nature and complexity of these calculations is influenced strongly by the geometric shape of the component. It is most convenient if the component approximates to some simple idealized form, such as a plate or shell (for example a body panel), a beam or tube (for example a chassis member or bumper), or a combination of ideahzed forms (for example a box structure). In these cases, standard design formulae can be provided into which appropriate parameters can be substituted for a particular application. 

It would be more acceptable for the design analysis to be based on methods developed specifically for the materials, but this action will require the designer of metals to accept new ideas. Obviously, this acceptance becomes easier to the degree that the newer methods are presented as far as possible in the form of limitations or modifications to the existing methods discussed in this book. Table 8.5 provides examples of formulas for flat plates. 

The strut design uses new, hybrid finite elements for the plane stress and plate bending analysis of layered structures. 

An additional passive reactor shutdown system based on the gravity driven operation of control rods actuated by a decrease in the magnetic flux in the magnetic control plate due to increased surrounding temperature, resulting in the release of control rods. The basic design analysis has been completed. Tests to confirm the function are planned. 

Under the sponsorship of the Pressure Vessel Research Committee, an extensive limit design analysis of perforated cylindrical shells with uniform patterns of openings was completed. This limit design analysis was used to determine the upper and lower bounds of limit pressure. A 2 1 ratio of stress held was considered and the shell plate curvature was not included. From this analysis, the basic lower bound equation was developed into... 

Boddu, R. and P. Majumdar. Gas flow analysis of bi-polar plates designs for fuel cells. Proceedings of the 4th International Conference on Fuel Cell Science, Engineering and Technology, Irvine, California, June 19-21,2006. 

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