Data

Tools

Indexes

Applications

Experiments

Open Source Science

bifacialvf

Bifacial PV View Factor model for system performance calculation

https://github.com/NREL/bifacialvf

Science Score: 36.0%

This score indicates how likely this project is to be science-related based on various indicators:

  • ○
    CITATION.cff file
  • ✓
    codemeta.json file
    Found codemeta.json file
  • ○
    .zenodo.json file
  • ✓
    DOI references
    Found 4 DOI reference(s) in README
  • ✓
    Academic publication links
    Links to: zenodo.org
  • ○
    Committers with academic emails
  • ○
    Institutional organization owner
  • ○
    JOSS paper metadata
  • ○
    Scientific vocabulary similarity
    Low similarity (18.7%) to scientific vocabulary

Keywords from Contributors

photovoltaics bifacial radiance renewable-energy renewables interactive projection embedded genomics observability
Last synced: 10 months ago · JSON representation

Repository

Bifacial PV View Factor model for system performance calculation

Basic Info
Statistics
  • Stars: 31
  • Watchers: 7
  • Forks: 26
  • Open Issues: 18
  • Releases: 10
Created over 8 years ago · Last pushed almost 2 years ago
Metadata Files
Readme License

README.md

logo

Bifacial PV View Factor model

License Build Status DOI

keywords: python, configuration factor model, electrical model mismatch for bifacial modules.

Introduction

bifacialvf is a self-contained view factor (or configuration factor) model which replicates a 5-row PV system of infinite extent perpendicular to the module rows. The function returns the irradiance profile along the middle (interior) row by default, but user interface options include 'first', 'interior', 'last', and 'single'. Single-axis tracking is supported, and hourly output files based on TMY inputs are saved. Spatial nonuniformity is reported, with multiple rear-facing irradiances collected on the back of each module row.

Bilinear interpolation code add-on to bifacialvf (description below) to pre-generate IV arrays and bifacial coefficients, and to examine the energy production with back side irradiance mismatch for either a portrait or landscape module.
Included are IV curves and bifacial info for a Yingli (standard) module.

Pre-requisites

This software is written for Python 2 or 3. NREL recommends Anaconda Python.

Install using pip

bifacialvf is at the Python Package Index (PyPI). Use pip to install the latest release in your conda environment or virtualenv:

(myenv)$ pip install bifacialvf

Install development mode from GitHub

For those interested in contributing to bifacialvf:

  1. Clone the bifacialvf repository: $ git clone https://github.com/NREL/bifacialvf.git bifacialvf-main
  2. Navigate to the repository directory where setup.py is located: $ cd bifacialvf-main
  3. Install via pip in development mode: $ pip install -e .

Usage

For usage examples, see the Jupyter notebooks in \docs\

License

bifacialvf open source code is copyrighted by the Alliance for Sustainable Energy and licensed with BSD-3-Clause terms, found here.

Citing bifacialVF

If you use bifacial_radiance in a published work, please cite:

Marion, B., MacAlpine, S., Deline, C., Asgharzadeh, A., Toor, F., Riley, D., … Hansen, C. (2017). A Practical Irradiance Model for Bifacial PV Modules: Preprint. In 44th IEEE Photovoltaic Specialists Conference. Washington, DC. https://www.nrel.gov/docs/fy17osti/67847.pdf. NREL/CP-5J00-67847

Please also cite the DOI corresponding to the specific version of bifacialVF that you used. bifacialvf DOIs are listed at Zenodo.org. 

Silvana Ovaitt, Chris Deline, Mark Mikofski, & Nick DiOrio. (2022). NREL/bifacialvf: v0.1.8 Release (v0.1.8). Zenodo. https://doi.org/10.5281/zenodo.6369162

Bilinear Interpolation based on the publications:

De Soto, W., Klein, S. A., & Beckman, W. A. (2006). Improvement and validation of a model for photovoltaic array performance. Solar Energy, 80(1), 78–88. https://doi.org/10.1016/j.solener.2005.06.010

Marion, B., Rummel, S., & Anderberg, A. (2004). Current--voltage curve translation by bilinear interpolation. Progress in Photovoltaics: Research and Applications, 12(8), 593–607.

bifacialvf: Original code by Bill Marion, Python translation by Silvana Ayala, Updates by Chris Deline & team Original bilinear interpolation code by Sara MacAlpine, Python translation & Updates by Silvana Ayala PVMismatch add-on: PVmismatch code from PVMismatch, by Sunpower

Owner

  • Name: National Renewable Energy Laboratory
  • Login: NREL
  • Kind: organization
  • Location: Golden, CO

GitHub Events

Total
  • Issues event: 1
  • Watch event: 1
  • Issue comment event: 2
  • Pull request event: 1
  • Fork event: 9
Last Year
  • Issues event: 1
  • Watch event: 1
  • Issue comment event: 2
  • Pull request event: 1
  • Fork event: 9

Committers

Last synced: 11 months ago

All Time
  • Total Commits: 177
  • Total Committers: 6
  • Avg Commits per committer: 29.5
  • Development Distribution Score (DDS): 0.537
Past Year
  • Commits: 13
  • Committers: 3
  • Avg Commits per committer: 4.333
  • Development Distribution Score (DDS): 0.231
Top Committers
Name Email Commits
cdeline c****e@n****v 82
Silvana Ayala s****a@n****v 70
Mark Mikofski b****o@y****m 16
dependabot[bot] 4****] 5
Ayala s****a@n****v 3
Nick DiOrio n****o@g****m 1
Committer Domains (Top 20 + Academic)
nrel.gov: 3

Issues and Pull Requests

Last synced: 10 months ago

All Time
  • Total issues: 32
  • Total pull requests: 30
  • Average time to close issues: 5 months
  • Average time to close pull requests: 4 months
  • Total issue authors: 13
  • Total pull request authors: 8
  • Average comments per issue: 2.09
  • Average comments per pull request: 1.2
  • Merged pull requests: 24
  • Bot issues: 0
  • Bot pull requests: 6
Past Year
  • Issues: 2
  • Pull requests: 3
  • Average time to close issues: N/A
  • Average time to close pull requests: 3 days
  • Issue authors: 2
  • Pull request authors: 3
  • Average comments per issue: 0.5
  • Average comments per pull request: 1.67
  • Merged pull requests: 1
  • Bot issues: 0
  • Bot pull requests: 0
View more stats
Top Authors
Issue Authors
  • cdeline (11)
  • shirubana (8)
  • mikofski (2)
  • bmcote (1)
  • RanYaBif (1)
  • nicorie (1)
  • snowskysun (1)
  • ozalzi (1)
  • ManonPetit (1)
  • Nitzan-hez (1)
  • kandersolar (1)
  • etoni044 (1)
  • tcapelle (1)
Pull Request Authors
  • cdeline (11)
  • mikofski (7)
  • dependabot[bot] (7)
  • shirubana (3)
  • mjprilliman (2)
  • tcapelle (1)
  • kandersolar (1)
  • nickdiorio (1)
Top Labels
Issue Labels
v0.1.8 (8) bug (3) enhancement (2)
Pull Request Labels
dependencies (7)

Packages

  • Total packages: 2
  • Total downloads:
    • pypi 504 last-month
  • Total dependent packages: 0
    (may contain duplicates)
  • Total dependent repositories: 1
    (may contain duplicates)
  • Total versions: 9
  • Total maintainers: 1
proxy.golang.org: github.com/nrel/bifacialvf
  • Versions: 3
  • Dependent Packages: 0
  • Dependent Repositories: 0
Rankings
Dependent packages count: 7.0%
Average: 8.2%
Dependent repos count: 9.3%
Last synced: 10 months ago
pypi.org: bifacialvf

Bifacial PV system evaluation using view factor method

  • Versions: 6
  • Dependent Packages: 0
  • Dependent Repositories: 1
  • Downloads: 504 Last month
Rankings
Dependent packages count: 7.3%
Forks count: 9.1%
Stargazers count: 12.5%
Average: 13.3%
Downloads: 15.5%
Dependent repos count: 22.1%
Maintainers (1)
cdeline
Last synced: 10 months ago

Dependencies

requirements.txt pypi
  • cycler ==0.10.0
  • kiwisolver ==1.2.0
  • matplotlib ==3.2.1
  • numpy ==1.21.0
  • pandas ==0.25.2
  • pvlib ==0.7.0
  • pvmismatch ==4.1
  • py ==1.10.0
  • pyparsing ==2.4.7
  • pytest ==5.4.1
  • pytest-cov ==2.8.1
  • python-dateutil ==2.8.0
  • pytz ==2019.1
  • six ==1.14.0
  • tqdm ==4.45.0
setup.py pypi
  • numpy *
  • pvlib *
  • pvmismatch *
  • tqdm *
.github/workflows/pytest.yaml actions
  • actions/checkout v2 composite
  • actions/setup-python v2 composite