GreenHEART: Green Hydrogen Energy and Renewable Technologies

GreenHEART: Green Hydrogen Energy and Renewable Technologies

CI Tests

Hybrid project power-to-x component-level system performance and financial modeling for control and design optimization. GreenHEART currently includes renewable energy, hydrogen, ammonia, and steel. Other elements such as desalination systems, pipelines, compressors, and storage systems can also be included as needed.

Software requirements

• Python version 3.9, 3.10, 3.11 64-bit
• Other versions may still work, but have not been extensively tested at this time

Installing from Package Repositories

1. GreenHEART is available as a PyPi package:

   pip install greenheart

Installing from Source

1. Using Git, navigate to a local target directory and clone repository:

   git clone https://github.com/NREL/GreenHEART.git

2. Navigate to GreenHEART

   cd GreenHEART

3. Create a new virtual environment and change to it. Using Conda and naming it 'greenheart':

   conda create --name greenheart python=3.9 -y
   conda activate greenheart

4. Install GreenHEART and its dependencies:

   conda install -y -c conda-forge coin-or-cbc=2.10.8 glpk
   pip install electrolyzer@git+https://github.com/jaredthomas68/electrolyzer.git@smoothing
   pip install ProFAST@git+https://github.com/NREL/ProFAST.git

   Note if you are on Windows, you will have to manually install Cbc: https://github.com/coin-or/Cbc.

   • If you want to just use GreenHEART:

     pip install .  

   • If you want to work with the examples:

     pip install ".[examples]"

   • If you also want development dependencies for running tests and building docs:

     pip install -e ".[develop]"

   • In one step, all dependencies can be installed as:

     pip install -e ".[all]

5. The functions which download resource data require an NREL API key. Obtain a key from:

   https://developer.nrel.gov/signup/

6. To set up the NREL_API_KEY and NREL_API_EMAIL required for resource downloads, you can create Environment Variables called NREL_API_KEY and NREL_API_EMAIL. Otherwise, you can keep the key in a new file called ".env" in the root directory of this project.

   Create a file ".env" that contains the single line:

   NREL_API_KEY=key
   NREL_API_EMAIL=your.name@email.com

7. Verify setup by running tests:

   pytest

8. To set up NREL_API_KEY for resource downloads, first refer to section 7 and 8 above. But for the .env file method, the file should go in the working directory of your Python project, e.g. directory from where you run python.

Parallel processing for GreenHEART finite differences and design of experiments

GreenHEART is set up to run in parallel using MPI and PETSc for finite differencing and for design of experiments runs through OpenMDAO. To use this capability you will need to follow the addtional installation instruction below:

conda install -c conda-forge mpi4py petsc4py

For more details on implementation and installation, reference the documentation for OpenMDAO.

To to check that your installation is working, do the following:

cd tests/greenheart/
mpirun -n 2 pytest test_openmdao_mpi.py

Getting Started

The Examples contain Jupyter notebooks and sample YAML files for common usage scenarios in GreenHEART. These are actively maintained and updated to demonstrate GreenHEART's capabilities. For full details on simulation options and other features, documentation is forthcoming.

Contributing

Interested in improving GreenHEART? Please see the Contributing section for more information.