Designs that are meant to serve as an initial check before choosing to work further on a proposed process or discard it. These designs are based on estimated process methods, use rough cost estimates, and minimize details and calculation time. 

Preliminary Designs

Designs that can be developed if a preliminary design for shows promise in a process. These designs include a cost-and-profit potential found with detailed calculations and analysis, although exclude exact equipment specifications and drafting-room work.

Detailed-Estimate Designs

- Preliminary / quick-estimate designs
- Detailed-estimate designs
- Firm process designs / detailed designs

Calvin College

A term encompassing the engineering behind the development of an industrial plant. There are many aspects to consider in plant design, from comparing different processes that yield the same product to the geographical location of the plant itself.

Plant Design (Chemical Engineering)

Peters, M. S., et al. Plant Design and Economics for Chemical Engineers. 4th ed., McGraw-Hill, 2003. 

Plant Design and Economics for Chemical Engineers: Fourth Edition

A diagram used by chemical engineers to ease understanding in plant processes. This diagram displays the sequence of equipment and unit operations in a plant, and details material quantities and energy transfers.

Flow Diagram

Plant Design Types

By weighing certain variables, one can narrow down differing plant processes that would yield the same product, instead of having to make multiple complete designs and comparing them afterwards.

Comparing Plant Designs

Fogler, H. S. (2016). Elements of chemical reaction engineering. Pearson Education. 

Elements of Chemical Reaction Engineering Fifth Edition 

- Batch (BR)

Continuous-Flow:
- Continuous-Stirred Tank (CSTR)
- Plug-Flow (PFR)
- Fixed Bed / Packed Bed (PBR)

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