Instrument air, dried, 8 bar(a)

Utility dataset: dry instrument air at 8 bar(a) (-40 degC pressure dew point), per kg: compressor power from the isothermal work and an ASSUMED efficiency, heatless dryer purge, heat to cooling water, condensate to treatment.

Calculation maturity: not assessedDesign maturity: Concept (research)Not independently reviewedUtilitiesReport a problem with this process
Research outputNot engineering advice and not an approved design: do not use it for construction, operation or safety decisions. What this means

Utility dataset: dry instrument air at 8 bar(a) (-40 degC pressure dew point), per kg: compressor power from the isothermal work and an ASSUMED efficiency, heatless dryer purge, heat to cooling water, condensate to treatment.

Capacity
per unit of the utility delivered (the dataset's basis); no plant size

What goes in and out

In

  • AirFeedstockambient air, free

Out

Utilities: Electricity, Cooling water

Show in the process graph

Life cycle assessment

No footprint assessed yet; the process is part of the life-cycle inventory below.

In the open LCI database (cheme-as-code-atlas-preview-c3ab348) as Instrument air, dried, 8 bar(a).

Download it for Brightway, openLCA and other tools.

In the LCI database: system model, datasets and KPIs against the benchmarks

In the LCI database

System model
attributional, cut-off (methodology 1.1.0)
Allocation
mass (single-output, from default) · product:instrument-air 100 %
Allocation findings
none
Change report
Not available: this build has no change report against an earlier release.
Dataset pages
Instrument air, dried, 8 bar(a)

KPI benchmark positions: not available (no benchmarked KPI for this process's datasets).

Maturity and review

Design maturity Concept (claimed): An idea or first flowsheet; numbers are rough. No independent engineering review yet. Automated checks passing is not a review.

Calculation maturity, from the checked evidenceNot assessed

The process has no maturity report (cheme maturity, checks/maturity.json), so no calculation maturity is established.

No level shownThe design maturity (Concept) is the manifest's claim, not evidence. A level appears here once the process's repository holds a current report from cheme maturity --write.

Artifact completeness

Which deliverables exist. They never raise a calculation maturity level: a drawing from unchecked numbers is still unchecked.

Not reported without a maturity report.

Independent review

Not independently reviewed

No independent engineering review yet. Automated checks passing is not a review.

Set by people only. Reaching a calculation maturity level or passing automated checks is not an independent review or an approval.

Where the evidence comes from
Report
processes/utility-instrument-air/checks/maturity.json (not in the library)
Method
How ChemE-as-Code checks the levels (requirement by requirement)

Open items

0 open items · 0 closed

New action itemNew engineering holdNew technical queryNew design changeAll issues

Sources

Library version
c3ab348 (process last changed in c3ab348)
Data
Catalog record (JSON) · CC-BY-4.0
Files
View the files on GitHub · change history and authors

References

  • Wagner, W. and Pruss, A. (2002) The IAPWS formulation 1995 for the thermodynamic properties of ordinary water substance for general and scientific use, J. Phys. Chem. Ref. Data 31:387
  • Bell, I. H., Wronski, J., Quoilin, S. and Lemort, V. (2014) Pure and pseudo-pure fluid thermophysical property evaluation and the open-source thermophysical property library CoolProp, Ind. Eng. Chem. Res. 53:2498
  • Prohaska, T. et al. (2022) Standard atomic weights of the elements 2021 (IUPAC Technical Report), Pure Appl. Chem. 94:573
  • Herrmann, S., Kretzschmar, H.-J. and Gatley, D. P. (2009) Thermodynamic properties of real moist air, dry air, steam, water, and ice (ASHRAE RP-1485), HVAC&R Research 15:961

How to cite

For the data, cite the Process Atlas paper; for the platform that builds and checks it, the ChemE-as-Code paper.

Schweidtmann, A. M. & Weber, J. M. (2026, in preparation). Process Atlas: an open, git-native, reproducible library and life cycle inventory of chemical processes (working title).

For this process: "Instrument air, dried, 8 bar(a)", ChemE-as-Code process library, version c3ab348.

BibTeX
@unpublished{schweidtmann_process_atlas,
  author = {Schweidtmann, Artur M. and Weber, Jana M.},
  title = {{Process Atlas: an open, git-native, reproducible library and life cycle inventory of chemical processes (working title)}},
  year = {2026},
  url = {https://atlas.cheme-as-code.org},
  note = {in preparation}
}

Schweidtmann, A. M. (2026, in preparation). ChemE-as-Code: An Open-Source Platform for AI-Accelerated Chemical Process Engineering (working title).

BibTeX
@unpublished{schweidtmann_cheme_as_code,
  author = {Schweidtmann, Artur M.},
  title = {{ChemE-as-Code: An Open-Source Platform for AI-Accelerated Chemical Process Engineering (working title)}},
  year = {2026},
  url = {https://cheme-as-code.org},
  note = {in preparation}
}