ecoana 0.0.1

ECO-ANA: Techno-Economic Analysis Tool for Chemical Processes

[ECO-ANA: Techno-Economic Analysis Tool for Chemical Processes]

SUMMARY

ECO-ANA(Process Economic-Analyzer) is designed to support early-stage techno-economic analysis (TEA) of chemical processes accounting for cost estimation model uncertainty.
This was developed by LSPE, the Laboratory for Sustainable Process Engineering from Chungnam national university.
LSPE@CNU: https://sites.google.com/view/rohgroup

INSTALLATION

Install the package from PyPI:

pip install ecoana

MODULES

1. ecoana.eqpcomo()
eqpcomo() is a Python module for chemical process equipment cost estimation. This module provides a unified interface to estimate equipment purchase costs using several well-known correlations from chemical engineering literature. Each model contains equipment-specific correlations, capacity ranges, and material factors based on the original literature sources.

   The library currently implements equipment cost estimation models from:

   Turton model: Richard A. Turton (2018), “Analysis, Synthesis, and Design of Chemical processes” (5th ed.)
   Seider model: Warren D. Seider (2016), “Product and Process Design Principles: Synthesis, Analysis and Evaluation” (4th ed.)
   Smith model: Robin Smith (2016), “Chemical Process Design and Integration” (2nd ed.)
   Peters model: Max. S. Peters (2003), “Plant Design and Economics for Chemical Engineers” (5th ed.)
   Towler model: Gavin Towler (2007), “Chemical Engineering Design –Principles, Practice and Economics of plant” (1st ed.)
   Guthrie model: L. T. Biegler (1997) "Systematic Methods of Chemical Process Design" (1st ed.)

• Function Interface
  Main features:

  eqpcomo(model="model name", equipment="equipment name", eqptype="equipment type name", par_1=par_1_value, par_2=par_2_value,...)
  

  
  Table of parameters to `eqpcomo()` function:

  Parameter	Description
  model	Cost estimation model (Turton, Seider, Smith, Towler, Peters, Guthrie)
  equipment	Equipment name
  eqptype	Equipment type
  material	Construction material
  T_K	Design temperature (K)
  P_bar	Design pressure (bar)
  vol_cum	Volume (m³)
  area_sqm	Heat transfer area (m²)
  power_kW	Equipment power (kW)
  massflow_kgph	Mass flow rate (kg/h)
  volflow_cumph	Volumetric flow rate (m³/h)
  diameter_m	Diameter (m)
  height_m	Height (m)
  thickness_m	Wall thickness (m)

  
  

• Basic Usage
  Example: Estimating the cost of a centrifugal compressor using the Smith model.

  from ecoana import eqpcomo
  
  cost = eqpcomo(
       model="Smith",
       equipment="Compressor",
       eqptype="Centrifugal",
       T_K=400,
       P_bar=10,
       material='Carbon steel',
       power_kW=1000
  )
  print(cost)
  

  Output: The eqpcomo() returns a tuple containing two values.

  (212390.5, '2000 year basis')
  

  Each equipment cost estimation models are based on correlations derived from price data for different years.
  Therefore, the function returns the basis year together with the cost estimate so that users can adjust the cost using an appropriate Capital Cost Index (e.g., CEPCI) if needed.
  
  

• Error Messages
  The required parameters for function can be differ depending on selected cost estimation model or equipment type.
  
  Therefore, the eqpcomo() includes built-in input validation and guidance through error messages.
  
  If required parameters are missing or invalid, the function returns a error message indicating:
  

  • which input parameter is missing
  • whether the selected model or equipment type is unsupported
  • the list of available options for the given model
  
  Example 1:
  If the essential parameters required for cost estimation is not input into the function,

  eqpcomo(model="Turton", equipment="Vaporizer")
  

  Error: Missing required input variables for the selected model and equipment. Missing variables: ['eqptype', 'vol_cum', 'P_bar', 'material']
  

  
  Example 2:
  If the model does not support the equipment cost estimation formula for the equipment specifiaction (e.g., material, equipment, eqptype) input by the user.

  eqpcomo(model="Turton", equipment="Membrane")
  

  Error: The selected equipment 'Membrane' is not available in the equipment cost estimation model. Available equipment options: ['Blender', 'Centrifuge', 'Compressor', 'Conveyor', 'Crystallizer-batch evaporative', 'Dryer', 'Dust collector', 'Evaporator', 'Fans', 'Furnace', 'Filters', 'Mixer', 'Heater', 'Packing', 'Vessel/Tower', 'Pumps', 'Reactor', 'Storage tank', 'Screens', 'Trays', 'Turbines', 'Vaporizer', 'Heat exchanger (shell and tube)', 'Heat exchanger (others)']
  

  
  

• Automatic Parameter Estimation
  The eqpcomo() can automatically estimate some parameters when they are not explicitly provided, as long as enough related equipment data is available.
  

Estimated parameter	Description	Required input parameters for estimation	Applied condition
vol_cum	Vessel volume	diameter_m, height_m	When equipment="Vessel/Tower" and vol_cum is not provided
thickness_m	Vessel wall thickness	diameter_m, P_bar, T_K, material	When equipment="Vessel/Tower" and thickness_m is not provided
pumphead_m	Pump head	power_kW, volflow_cumph, massflow_kgph	Available through helper logic when pump head needs to be inferred

AUTHOR

Haeun Choi
E-mail: [e-mail]

ACKNOWLEDGEMENT

This work is supported by the Development of next-generation biorefinery platform technologies for leading bio-based chemicals industry project (2022M3J5A1056072), by Development of platform technologies of microbial cell factories for the next-generation biorefineries project (2022M3J5A1056117), and by the Education and Research Center for Eco-Friendly Next-Generation Batteries (RS-2024-00447869) from National Research Foundation supported by the Korean Ministry of Science and ICT.