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Lecture 1

Lecture 1. Design Basics. What does it take?. Creativity Design will be rewarding The old saying “Many ways to skin a cat” Which begs the question “Why would you want too?” Targets Constraints. Constraints. Economic Physical Laws Government Regulations Time. The Design Process.

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Lecture 1

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  1. Lecture 1 Design Basics

  2. What does it take? • Creativity • Design will be rewarding • The old saying “Many ways to skin a cat” • Which begs the question • “Why would you want too?” • Targets • Constraints

  3. Constraints • Economic • Physical Laws • Government Regulations • Time

  4. The Design Process Objective (Design Specification) Collection of Data, physical properties, design methods Generation of possible designs Selection and Evaluation Final Design

  5. Recycle of un-reacted materials Flow Material Storage Feed Preparation Product Separation Reaction By-products Product Purification Product Storage Sales Wastes Anatomy of a Chemical Process

  6. Project Binder • General Correspondence • Communications between design team • Equipment vendors • Stake holders • Calculation Sheets • Design Calculations • Costing • Computer printouts • Drawings • PFD • P&ID • Plot/Site Plans • Design Sketches • Specification Sheets • Unit Operations design details • Tender Documents • Purchase Orders • Quotations • Invoices

  7. Process Manual • Process Overview • Operating Manuals • Operating Procedures • Hazop

  8. Codes and Standards • Why? • Governing Bodies • API • ANSI • ASTM • ASME • ISO • GPSA

  9. Information Flow Unit Operation Inlet Outlet Input Information Calculation Method Output Information

  10. Degrees of Freedom • If Nd = 0 : Then there is only one solution, the problem is not a true design problem as there is no room for optimization. • If Nd < 0 : Then the problem is over-specified and only a trivial solution is possible. • If Nd > 0 : Then the problem has an infinite number of possible solutions however the designer must assign values to Nd variables to solve the problem. The values assigned must come from research, codes, standards, rules of thumb and design experience.

  11. Assignment 1 • 100 scfm of Atmospheric air must be heated up to 80oC for use in a downstream process. • What are our design options? • Use HYSYS to evaluate the possible options • Which would you choose and why

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