Metadata-Version: 2.1
Name: solarenergy
Version: 0.0.3
Summary: A Python module do simple modelling in the field of solar energy
Home-page: https://github.com/MarcvdSluys/SolarEnergy
Author: Marc van der Sluys
License: GPLv3+
Keywords: solar energy,solar,energy,sun
Platform: UNKNOWN
Classifier: Development Status :: 4 - Beta
Classifier: Intended Audience :: Developers
Classifier: Intended Audience :: Education
Classifier: Intended Audience :: Science/Research
Classifier: License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)
Classifier: Natural Language :: English
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python :: 3
Classifier: Topic :: Scientific/Engineering
Classifier: Topic :: Scientific/Engineering :: Astronomy
Classifier: Topic :: Scientific/Engineering :: Physics
Description-Content-Type: text/markdown
Requires-Dist: sys
Requires-Dist: datetime
Requires-Dist: pytz
Requires-Dist: numpy
Requires-Dist: soltrack

# SolarEnergy #

A Python module do simple modelling in the field of solar energy.  The code is being developped by Marc van
der Sluys of the department of Sustainable energy of the HAN University of Applied Sciences in Arnhem, the
Netherlands.


## Installation ##

This package can be installed using `pip install solarenergy`.  This should automatically install the dependency
packages `sys`, `datetime`, `pytz`, `numpy` and `soltrack` if they haven't been installed already.
If you are installing by hand, ensure that these packages are installed as well.


## Example use ##

```python
import solarenergy as se
import numpy as np

r2d = 180/np.pi  # Multiplication factor to convert radians to degrees
d2r = 1/r2d      # Multiplication factor to convert degrees to radians

# Location of my solar panels:
geoLon =  5*d2r  # Geographic longitude (>0 for eastern hemisphere; ° -> rad)
geoLat = 52*d2r  # Geographic latitude  (>0 for northern hemisphere; ° -> rad)

# Orientation of my solar panels:
spAz   = -2*d2r    # Azimuth ('wind direction') of my panels are facing.  Note: South=0, W=90° (pi/2 rad) in the northern hemisphere!  (rad)
spIncl = 28*d2r    # Inclination of my panels w.r.t. the horizontal  (rad)

# An hour past noon local time on 1 March 2020:
myTZ  = 'Europe/Amsterdam'
year  = 2020
month = 3
day   = 1
hour  = 13

# Compute Sun position (uses SolTrack behind the scenes):
sunAz,sunAlt,sunDist = se.computeSunPos(geoLon,geoLat, year,month,day, hour, timezone=myTZ)

AM        = se.airmass(sunAlt)                            # Air mass for this Sun altitude
extFac    = se.extintionFactor(AM)                        # Extinction factor at sea level for this airmass
cosTheta  = se.angleSunPanels(spAz,spIncl, sunAz,sunAlt)  # cos of the angle with which Sun hits my panels

solConst  = 1361.5 / sunDist**2                           # Solar constant, scaled with solar distance
DNI       = solConst / extFac                             # DNI for a clear sky
dirRad    = DNI * cosTheta                                # Insolation of direct sunlight on my panels


# Print input and output:
print("Location:           %0.3lf E, %0.3lf N"  % (geoLon*r2d, geoLat*r2d))
print("Date:               %4d-%2.2d-%2.2d"     % (year, month, day))
print("Time:               %2d:00"              % (hour))
print()

print("Sun azimuth:        %7.3lf°"   % (sunAz*r2d))
print("Sun altitude:       %7.3lf°"   % (sunAlt*r2d))
print("Sun distance:       %7.4lf AU" % (sunDist))
print()

print("Air mass:           %7.3lf"         % (AM))
print("Extinction factor:  %7.3lf"         % (extFac))
print("Sun-panels angle:   %7.1lf°"        % (np.arccos(cosTheta)*r2d))
print()

print("Solar constant:     %7.1lf W/m²"    % (solConst))
print("DNI:                %7.1lf W/m²"    % (DNI))
print("Direct insolation:  %7.1lf W/m²"    % (dirRad))
print()
```

## SolarEnergy pages ##

* [Pypi](https://pypi.org/project/solarenergy/): SolarEnergy Python package
* [GitHub](https://github.com/MarcvdSluys/SolarEnergy): SolarEnergy source code


## Author and licence ##

* Author: Marc van der Sluys
* Contact: http://han.vandersluys.nl/en/
* Licence: [GPLv3+](https://www.gnu.org/licenses/gpl.html)


## References ##

* This Python code is adapted from the Fortran implementation in
  [libTheSky](http://libthesky.sourceforge.net/), which contains many references.
* [Celestial mechanics in a nutshell (CMiaNS)](https://cmians.sourceforge.io/)


