Internal heat integrated distillation columns (iHIDiCs)—New systematic design methodology

2009 ◽  
Vol 87 (12) ◽  
pp. 1658-1666 ◽  
Author(s):  
Mamdouh A. Gadalla
Keyword(s):  
Design Methodology ◽  
Internal Heat ◽  
Systematic Design ◽  
Distillation Columns

On the Maximum Value of the Maximum Degree of Kinematic Chains

1987 ◽  
Vol 109 (4) ◽  
pp. 487-490 ◽  
Author(s):  
Hong-Sen Yan ◽  
Frank Harary
Keyword(s):  
Graph Theory ◽  
Maximum Degree ◽  
Design Methodology ◽  
Creative Design ◽  
Systematic Design ◽  
Kinematic Chains ◽  
Maximum Value ◽  
Mathematical Expressions

One of the major steps in the development of a systematic design methodology for the creative design of vehicle mechanisms is to obtain all possible link assortments, and then to generate the catalogs of kinematic chains. If the generalized mathematical expressions for the maximum value M of the maximum number of joints incident to a link of kinematic chains with N links and J joints can be derived, the process of solving link assortments can be more systematic. Using elementary concepts of graph theory, we derived explicit relationships for M for two regions of the J-N plane.

A Systematic Design Methodology for Class-AB-Style Ring Amplifiers

2018 ◽  
Vol 65 (9) ◽  
pp. 1169-1173 ◽  
Author(s):  
Karim M. Megawer ◽  
Faisal A. Hussien ◽  
Mohamed M. Aboudina ◽  
Ahmed N. Mohieldin
Keyword(s):  
Design Methodology ◽  
Systematic Design ◽  
Class Ab

scholarly journals CONCEPTUALIZE–DESIGN ENHANCEMENT OF SYSTEMATIC DESIGN ENGINEERING METHOD

2013 ◽  
Author(s):  
W. Ernst Eder
Keyword(s):  
Life Cycle ◽  
Engineering Design ◽  
Design Methodology ◽  
Engineering Method ◽  
Design Engineering ◽  
Systematic Design ◽  
Transformation System ◽  
Levels Of Abstraction ◽  
Case Examples ◽  
Decomposition Of Functions

The engineering design methodology of Pahl and Beitz is good in the detailed stages, but needs enhancement in the early stages of conceptualizing and embodiment-in-principle. The concept of ‘functions’ has been enhanced by Hubka and colleagues. A ‘functional basis’ (Hirtz et al) has improved the definitions of ‘flows’ and ‘functions’, their work does not go far enough to provide a basis for conceptualizing. ‘Affordances’ (Maier and Fadel) are covered by full use of systematic conceptualizing of design engineering solutions. The Pahl-Beitz model and method of ‘decomposition of functions’, ‘physics’, and components is contrasted with the Hubka models of a transformation system, TrfS, its constituents, structures, properties life cycle, etc., and their use as method for design engineering by searching for alternative embodiments at each of these levels of abstraction. These steps are illustrated in (to date) 21 case examples published between 1976 and 2012, several of them in the CEEA conferences and their predecessors.

Design Methodology for the Support Beams of Internal Beds in Vertical Vessels

2010 ◽  
Author(s):  
Devki Nandan Garg
Keyword(s):  
Design Methodology ◽  
Pressure Vessels ◽  
Cross Sectional ◽  
Vertical Pressure ◽  
Distillation Columns ◽  
The Common ◽  
Vessel Walls ◽  
User Friendly

In the Petro-Chemical and other industries, vertical pressure vessels frequently have internal beds which are supported by the vessel walls. Hydrocracking and hydrotreating reactors, packed, tray and distillation columns and filters to name a few, are the common examples of such vessels. Each such bed is generally supported by a set of support beams, sectional bed supports (gratings) and a segmented circumferential ring; the ring supporting the peripheral edges of the gratings. The design details of these beds vary considerably. This paper covers a simple and user friendly procedure for the design of bed support beams, regardless of the complexities of the design details and can be applied in all the design situations. From practical stand point even number of beams are used for each bed which are symmetrically placed with respect to the vessel cross sectional centerline. It is also desirable that such beams be equally spaced to enable standard width grating (grid) sections. The spacing of beams, especially in complex hydrocracker reactor beds with high design pressures (3,000 psi) and design temperatures (900°F) is dictated by the size and weight of the largest beams and bed (grid) sections, which are installed through the top reactor man way openings.

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