Product Information

CO₂Tab™ Product Information

Introduction

CO₂Tab is an important productivity tool for those who are engaged in the ever widening variety of applications of carbon dioxide such as: closed-loop refrigeration, frozen food processing, food preservation and storage, beverage carbonation, brewery operations, supercritical fluid extraction, precision cleaning with carbon dioxide, pipeline engineering, enhanced oil recovery, slurry transport, inerting, gas processing, CO₂ scrubbing, or research activities for effective CO2 sequestration methods to control the greenhouse gases.

CO₂Tab, designed as an add-in package to popular spreadsheet applications, allows users the convenient access, without leaving the spreadsheet computation environment, to a variety of property values. CO₂Tab contains a comprehensive set of thermodynamic and transport properties applicable over a wide range of conditions, with selected derivative and dimensionless properties.

CO₂Tab also includes functions for obtaining the temperature or pressure along the sublimation line and the melting line. CO₂Tab also allows the calculation of the solubility of CO₂ in water, which is an important parameter in atmospheric chemistry, the beverage industry, etc.

CO₂Tab uses fundamental equations to calculate all properties with no interpolation or curve fits to raw data. CO₂Tab uses the international standard formulation for the thermodynamic and transport properties of carbon dioxide. The references used in CO₂Tab are:

Note: CO₂Tab includes properties for the sublimation and melting line.

Range

Most thermo-physical property functions of CO₂ in CO₂Tab, with the exception of solubility functions, are applicable to conditions within the following wide ranges:

• Pressure (P, bar): 0 <= P <= 8,000
• Temperature (T, °C): -73.15 <= T <= 826.85

 

Solubility functions of CO₂ in H₂O are valid within the following ranges of conditions:

• Pressure (P, bar):  P <= 10
• Temperature (T, °C): 0 <= T <= 160

 

Worksheet Functions

The CO₂Tab add-in package is based on a set of 29 core functions that together calculate over 46 thermodynamic and transport properties of carbon dioxide. You can use these functions directly in your spreadsheet or you can use CO₂Tab easy-to-use dialog boxes to automatically generate the appropriate function call with the correct arguments.

CO₂Tab functions are divided into the following categories:

1. Functions for saturated vapor, liquid or two-phase properties
   (2 functions)
2. Functions for superheated vapor or subcooled liquid properties
   (9 functions)
3. Melting and Sublimation Line Functions
   (4 functions)
4. Solubility in Water
   (2 functions)
5. Functions for constant carbon dioxide properties
   (12 functions)

List of Supported Properties

Thermodynamic and Transport Properties

• Temperature, T
• Pressure, P
• Volume, V
• Density, D
• Compressibility factor, Z
• Helmoltz free energy, A
• Entropy, S
• Internal energy, U
• Enthalpy, H
• Gibbs free energy, G
• Heat capacity at constant volume, CV
• Heat capacity at constant pressure, CP
• Speed of sound, W
• Coefficient of thermal expansion, ALPHA = r (V/T)P
• Isothermal compressibility, KAPPA = -r (V/P)T
• DPDT, (P/T)V
• DVDT, (V/T)P
• DVDP, (V/P)T
• Viscosity (dynamic), MU
• Thermal conductivity, KT
• Surface tension, ST
• Prandtl number, PR
• Static dielectric constant, DC
• Isothermal Joule-Thomson coefficient, IJT
• Joule-Thomson coefficient, JT
• Quality, Q: Vapor fraction

 

Solubility in Water Properties

• Liquid mole fraction of CO2 (Molar solubility), XCO2
• Vapor mole fraction of CO2, YCO2
• Liquid mass fraction of CO2 (Mass solubility), XWCO2
• Vapor mass fraction of CO2, YWCO2

System Requirements

CO₂Tab V1.0 requires Microsoft Excel 97/2000/XP for Windows 95/98/NT4/2000/XP; 800 kilobytes of hard-disk space and a minimum of 8 MB of RAM.