pvtlib is a Python library that provides various tools in the categories of thermodynamics, fluid mechanics, metering and various process equipment. The library includes functions for calculating flow rates, gas properties, and other related calculations.
Installation
You can install the library using pip:
pip install pvtlib
Usage
Here is an example of how to use the library:
from pvtlib.metering import differential_pressure_flowmeters
# Example usage of the calculate_flow_venturi function
result = differential_pressure_flowmeters.calculate_flow_venturi(D=0.1, d=0.05, dP=200, rho1=1000)
print(result)
More examples are provided in the examples folder: https://github.com/equinor/pvtlib/tree/main/examples
Features
- Thermodynamics: Thermodynamic functions
- Fluid Mechanics: Fluid mechanic functions
- Metering: Metering functions
- aga8: Equations for calculating gas properties (GERG-2008 and DETAIL) using the Rust port (https://crates.io/crates/aga8) of NIST's AGA8 code (https://github.com/usnistgov/AGA8). Note: AGA8 is only valid for single-phase gas conditions. It does not check for phase state and will produce erroneous results in the two-phase or liquid region.
- Unit converters: Functions to convert between different units of measure
- Equipment:
- Compressors: Compressor performance calculations (e.g. polytropic exponent, polytropic head and efficiency)
- Separators: Separator/scrubber sizing functions (e.g. K-value calculations)
- Valves: Valve flow calculations (e.g. Kv/Cv flow factor)
Handling of invalid input
This library is used for analyzing large amounts of data, as well as in live applications. In these applications it is desired that the functions return "nan" (using numpy nan) when invalid input are provided, or in case of certain errors (such as "divide by zero" errors).
Running Tests
Tests are located in the tests/ folder and use pytest. Install it before running:
pip install pytest
Then run the tests from the project root:
pytest
License
This project is licensed under the MIT License - see the LICENSE file for details.
Contact
For any questions or suggestions, feel free to open an issue or contact the author at chaagen2013@gmail.com.
Release files for pvtlib 1.15.1
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| pvtlib-1.15.1.tar.gz | 69.9 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| pvtlib-1.15.1-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 121.4 kB
Release files / pvtlib-1.15.1.tar.gz
| Download URL | pvtlib-1.15.1.tar.gz |
|---|---|
| Size | 69.9 kB |
| Tags | Source |
|
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Release files / pvtlib-1.15.1-py3-none-any.whl
| Download URL | pvtlib-1.15.1-py3-none-any.whl |
|---|---|
| Size | 51.5 kB |
| Tags | Python 3 |
|
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