Psychrometric Chart

Thermodynamic properties and physical properties of humid air is a popular interest among almost everyone because, everyone faces the high humid, or low humid situations in their day-to-day lives. This is where psychrometrics comes in to the discussion. Psychrometrics is concerned about the gas-vapour mixtures' thermodynamic and physical properties. Among all of the gas-vapour mixtures, air-water-vapour mixture's thermodynamic properties is one of the highly debated psychrometric concerns. This excel addin will easily pave the way to quick calculations in psychrometric properties with an added bonus of psychrometric process calculations and unit conversion.

Developed by Suneth Warnakulasuriya

Features

1. Calculate wetbulb, dewpoint, specific enthalpy, humidity ratio and many more parameters of humid air for a given pressure and dry bulb temperature and another variable of interest.
2. Calculate the resultant point psychrometric properties of air process for a given sensible heat ratio (SHR) and initial point and the change in enthalpy.

2. Calculate the resultant point psychrometric properties of air adiabatic process with given initial point and an effectiveness for the process.
3. Calculate resultant point psychrometric properties of adiabatic air mixing process.
4. Calculate SHR for a process.
5. Unit conversion
6. Percentage Mean Vote (PMV) and Percentage of People Dissatisfied (PPD) calculation
7. All the above functions can be used in either imperial or metric unit systems of users choice.

Please use the following link to download latest psychrometric chart

• Psychrometric Chart

Further information on installation and guide on how to use this excel addin are described in following links.

• Installation

Installation of this excel adding is startight forward. Download the excel addin setup via above link. You might encounter a warning from the internet browser that, it is identified as harmful executable file. Ignore it, This is only a setup to install an ".xlam" file which is a macro enabled library file for excel. You don't have to worry about anything. Download the setup and follow instructions on it. Make sure to uninstall it from "Program and Features" section in control panel or "Uninstall" in the "Psychrometric Chart" start menu program group.

• Psychrometric Chart Capabilities
• Unit Conversion
• Frequently Asked Questions (FAQs)