---
code_id: 19120
site_ownership_code: "LBNL"
open_source: false
landing_page: "https://ipo.lbl.gov/marketplace"
project_type: "CS"
software_type: "S"
official_use_only: {}
developers:
- email: "LPan@lbl.gov"
  orcid: ""
  first_name: "Lehua"
  last_name: "Pan"
  middle_name: ""
  affiliations:
  - "Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)"
- email: "CADoughty@lbl.gov"
  orcid: ""
  first_name: "Christine"
  last_name: "Doughty"
  middle_name: "A"
  affiliations:
  - "Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)"
- email: "NSpycher@lbl.gov"
  orcid: ""
  first_name: "Nicholas"
  last_name: "Spycher"
  middle_name: ""
  affiliations:
  - "Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)"
- email: "K_Pruess@lbl.gov"
  orcid: ""
  first_name: "Karsten"
  last_name: "Pruess"
  middle_name: ""
  affiliations:
  - "Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)"
contributors: []
sponsoring_organizations:
- organization_name: "USDOE"
  funding_identifiers: []
  primary_award: "AC02-05CH11231  "
  DOE: true
contributing_organizations: []
research_organizations:
- organization_name: "Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United\
    \ States)"
  DOE: true
related_identifiers: []
release_date: "2015-04-21"
software_title: "\tECO2N V2.0"
acronym: "ECO2N V2.0"
doi: "https://doi.org/10.11578/dc.20180927.3"
description: "ECO2N V2.0 is a fluid property module for the TOUGH2 simulator (Version\
  \ 2.1) that was designed for applications to geologic sequestration of CO2 in saline\
  \ aquifers and enhanced geothermal reservoirs. ECO2N V2.0 is an enhanced version\
  \ of the previous ECO2N V1.0 module (Pruess, 2005). It expands the temperature range\
  \ up to about 300oC whereas V1.0 can only be used for temperatures below about 110oC.\
  \ V2.0 includes a comprehensive description of the thermodynamic and thermophysical\
  \ properties of H2O - NaCl - CO2 mixtures, that reproduces fluid properties largely\
  \ within experimental error for the temperature, pressure and salinity conditions\
  \ 10 °C < T < 300 °C, P < 600 bar, and salinity up to halite saturation. This includes\
  \ density, viscosity, and specific enthalpy of fluid phases as functions of temperature,\
  \ pressure, and composition, as well as partitioning of mass components H2O, NaCl\
  \ and CO2 among the different phases. In particular, V2.0 accounts for the effects\
  \ of water on the thermophysical properties of the CO2-rich phase, which was ignored\
  \ in V1.0, using a model consistent with the solubility models developed by Spycher\
  \ and Pruess (2005, 2010). In terms of solubility models, V2.0 uses the same model\
  \ for partitioning of mass components among the different phases (Spycher and Pruess,\
  \ 2005) as V1.0 for the low temperature range (<99oC) but uses a new model (Spycher\
  \ and Pruess, 2010) for the high temperature range (>109oC). In the transition range\
  \ (99-109oC), a smooth interpolation is applied to estimate the partitioning as\
  \ a function of the temperature. Flow processes can be modeled isothermally or non-isothermally,\
  \ and phase conditions represented may include a single (aqueous or CO2-rich) phase,\
  \ as well as two-phase (brine-CO2) mixtures. Fluid phases may appear or disappear\
  \ in the course of a simulation, and solid salt may precipitate or dissolve. Note\
  \ that the model cannot be applied to subcritical conditions that involves both\
  \ liquid and gaseous CO2 unless thermol process is ignored (i.e.,isothermal run).\
  \ For those cases, a user may use the fluid property module ECO2M (Pruess, 2011)\
  \ instead."
programming_languages: []
country_of_origin: "United States"
project_keywords: []
licenses:
- "Other"
proprietary_url: "https://ipo.lbl.gov/marketplace"
recipient_org: "LBNL"
site_accession_number: "2015-046"
file_name: "Source Code.zip"
date_record_added: "2018-09-27"
date_record_updated: "2019-09-24"
is_file_certified: false
is_limited: false
links:
- rel: "citation"
  href: "https://www.osti.gov/doecode/biblio/19120"