ModNN

ModNN is a Modularized Physics-Informed Neural Network for building energy modeling.

It incorporates with physics-informed model structure, loss function, and model constraints.

🚀 Installation

You can install the package using pip:

pip install modnn

🧠 Example

Please find the online Jupyter notebook for a step-by-step instruction: https://colab.research.google.com/drive/1A2jt1q53RtxGuaoym6N1PmlKELDPpYFX?usp=sharing

⚡ Quick start

Your CSV needs a datetime index and the columns temp_room, temp_amb, solar, occ and phvac.

from modnn import get_config, Mod

args = get_config({"datapath": "your_data.csv"})
model = Mod(args)
model.data_ready()       # or model.data_ready(df) with a pandas DataFrame
model.train()
model.load()
model.test()

or from the command line: python -m modnn.run your_data.csv

Scalers, checkpoints, trained models, results and figures are written to ./modnn_output (change with "output_dir"). The GPU is used when available, otherwise the CPU.

🧩 Model options

"ambient" and "solar" constrain the envelope module and need architecture="v3" with ext_mdl="RNN". For example, a model whose responses to HVAC, occupancy, weather and sun all follow physics:

args = get_config({"datapath": "your_data.csv", "ext_input": "delta",
                   "constraints": ["hvac", "internal", "ambient", "solar"]})

🧠 Update log

🧠 [2.0.0] 2025 May 9

To further improve physical consistency,

I replaced heat transfer module by set of energy balance equations,

Start from version 2.0.0

🧠 [2.0.1] 2025 May 10

Add another parameter: "envelop_mdl",

Allow user to use the new physics based module or previous data driven module.

🧠 [2.0.2] 2025 May 10

Fix bug due to parameter: "envelop_mdl",

Vectorize calculation,speed improved by ~6 times.

🧠 [3.0.0] 2025 June 11

Update datadriven modnn RC based envelop_mdl really hard to tune on new dataset

🧠 [3.0.1] 2025 June 11

Add a step function for one step ahead prediction

🧠 [3.0.2] 2025 June 11

Fix bug for step function

🧠 [3.0.3] 2025 June 11

Fix bug for step function

🧠 [3.0.4] 2025 Sept 10

Didn't work on it for 3 months, just update the latest version Will use it for BESTOpt building dynamic model

🧠 [3.0.5] 2025 Sept 15

3.0.4 CAN-NOT work at all, I mistakenly comment one line and add a new line of code

🧠 [3.0.6] 2025 Sept 15

Fix temperature unit conversion issue

🧠 [3.0.7] 2025 Sept 15

Fix step model zone module dimension issue

🧠 [3.1.0] 2026 Sept 25

New options: "architecture" (v1/v3) and "ext_input" (state/delta); physical constraints applied through model.apply_constraints()

Easier to use: from modnn import get_config, Mod, python -m modnn.run your_data.csv, outputs in ./modnn_output (previously ../), device defaults to "cuda" with CPU fallback, clear errors for a missing data file or column, scipy added to requirements

🧠 [3.2.0] 2026 Sept 25

Choose which responses are physically constrained with "constraints": any of "hvac", "internal", "ambient", "solar"

Presets removed

🧪 Requirements

Python 3.7+

PyTorch

NumPy

Pandas

Matplotlib

Seaborn

scikit-learn

tqdm

📬 License

MIT License

🙋‍♂️ Author

Zixin Jiang: zjiang19@syr.edu