C249 – API MPMS 2004: Calculation of Ctl
Description
This calculates the temperature correction factor.
References
API MPMS Chapter 11.1 – Temperature and Pressure Volume Correction Factors for Generalized Crude Oils, Refined Products, and Lubricating Oils (ASTM D 1250-04; IP 200/04) (First edition 2004, Addendum 1 2007)
Kelton calculation reference C249
This calculation is used by:
F060/K214 – API Density Referral 2004
Options
Thermal Expansion Coefficient
- User Entered
Select this option if you know the thermal expansion factor at 60°F of the hydrocarbon you are performing calculations on.
- Calculated
Select this option if you do not know the thermal expansion factor at 60°F of the hydrocarbon you are performing calculations on.
Commodity Group
- Crude Oil
Select this option if you have little information on the commodity and it has a density between 610.6 and 1163.5 kgm-3
- Fuel Oils
Select this option if your commodity is a fuel oil and it has a density between 838.3127 and 1163.5 kgm-3
- Jet Fuels
Select this option if your commodity is a fuel oil and it has a density between 787.5195 and 838.3127 kgm-3
- Transition Zone
Select this option if your commodity is in the transition zone between a jet fuel and gasoline and it has a density between 770.3520 and 787.5195 kgm-3
- Gasoline
Select this option if your commodity is in the transition zone between a jet fuel and gasoline and it has a density between 610.6 and 770.3520 kgm-3
- Lubricating Oil
Select this option if your commodity is a lubricating oil and it has a density between 800.9 and 1163.5 kgm-3
Constants
Constants as defined by API
| Commodity group | K0 | K1 | K2 |
| Crude oil | 341.0957 | 0 | 0 |
| Fuel oils | 103.8720 | 0.2701 | 0 |
| Jet fuels | 330.301 | 0 | 0 |
| Transition Zone | 1489.067 | 0 | -0.0018684 |
| Gasolines | 192.4571 | 0.2438 | 0 |
| Lubricating oil | 0 | 0.34878 | 0 |
Calculation
Temperature correction factor
The temperature correction factor, Ctl, is calculated by:
| Where | ||
|---|---|---|
| α60 | = | Thermal expansion factor at 60°F |
| δ60 | = | Temperature shift value |
| ΔT | = | Difference between the base temperature and the alternate temperature |