It implements a useful collection of psychrometric equations for moisture and humid air calculations, and the generation of beautiful and high customizable psychrometric charts in SVG with matplotlib.

Calculations are made by implementing experimental equations extracted from recognized sources, such as the 2009 ASHRAE Handbook—Fundamentals (SI).

Install

Clone it from Github if you want to run the tests, or simply:

pip install psychrochart

Features

SI units (with temperatures in celsius for better readability).
Easy style customization with a JSON template (colors, line styles and line widths).
Psychrometric charts within temperature and humidity ratio ranges, for any pressure, with:
- Saturation line
- Constant RH lines
- Constant enthalpy lines
- Constant wet-bulb temperature lines
- Constant specific volume lines
- Constant dry-bulb temperature lines (internal orthogonal grid, vertical)
- Constant humidity ratio lines (internal orthogonal grid, horizontal)
Plot legend for each family of lines
Specify labels for each family of lines
Overlay points and zones
Export SVG files
Tested against example tables from http://www.engineeringtoolbox.com
100 % code coverage.

The ranges of temperature, humidity and pressure where this library should provide good results are within the normal environments for people to live in. Don’t expect right results if doing other type of thermodynamic calculations. Over saturated water vapor states are not implemented.

Changelog

v0.1.0: Initial version.
v0.1.1: Minor plotting fixes, set axis position, define P with altitude_m or pressure_kpa, reuse plot removing annotations (chart.remove_annotations). Axes as internal prop, lazy plotting, save to disk helper (chart.save).
v0.1.2: Add agg module to set that matplotlib backend.
v0.1.3: Add custom params for plotting styles, option to exclude first and last tick (constant_{humid/temp}_label_include_limits).
v0.1.4: Customize labels and its locations for families of psychrometric curves.
v0.1.5: Add Arrows, compatibility with the Home Assistant component psychrometrics.
v0.1.6: Some cleaning, better typing, flake8, added tox.ini.
v0.1.7: Methods to clean the plot (.close_fig()) and to remove the legend (.remove_legend()).
v0.1.8: Memleak with savefig.
v0.1.10: Fix plot limits, do not use pyplot, axes are not optional.

Usage

from psychrochart.chart import PsychroChart

# Load default style:
chart_default = PsychroChart()
axes = chart_default.plot()

Tests

To run the tests, clone the repository and run:

py.test --cov=psychrochart -v --cov-report html

to generate the coverage reports.

License

MIT license, so do with it as you like ;-)

Metadata

Release files for psychrochart 0.1.10

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for psychrochart 0.1.10
File	Size	Uploaded
psychrochart-0.1.10.tar.gz	20.9 kB	Jul 29, 2017	Details

Built distribution (wheel)

Table of built distributions (wheels) for psychrochart 0.1.10
File	Interpreter	ABI	Platform	Reset
psychrochart-0.1.10-py2.py3-none-any.whl 24.0 kB Jul 29, 2017	Python 3, Python 2	none	any	Details

Total release size: 44.9 kB

Release files / psychrochart-0.1.10.tar.gz

Download URL	psychrochart-0.1.10.tar.gz
Size	20.9 kB
Tags	Source
SHA-256 checksum How to use checksums	`5c2650d97e7639095f3b89a39323f97ebb514748a37d982ec41d2e89af8767bf`
BLAKE2b-256 checksum How to use checksums	`fac0ebda983eff3413ce850a498168b2e7fbabebf92e201b6092536a04db90bf`
Upload date	Jul 29, 2017
Uploaded using Trusted Publishing? What is trusted publishing?	No

Release files / psychrochart-0.1.10-py2.py3-none-any.whl

Download URL	psychrochart-0.1.10-py2.py3-none-any.whl
Size	24.0 kB
Tags	Python 2 Python 3
SHA-256 checksum How to use checksums	`34a67778a0235e50ef2e4ce6948cbe80e7c47fc64b7571fa67b142427746753f`
BLAKE2b-256 checksum How to use checksums	`34f64ef671e45b7d7bfc08762cfd7813e42e5e8b3d9342dc5aa6bed3bc944e2b`
Upload date	Jul 29, 2017
Uploaded using Trusted Publishing? What is trusted publishing?	No