Engineering Equation Solver

EES (pronounced 'ease') is an acronym for Engineering Equation Solver. The basic function provided by EES is the solution of a set of algebraic equations. EES can efficiently solve thousands of coupled non-linear algebraic equations. EES can also be used to solve initial value differential equations. EES provides publication-quality plots, linear and non-linear regression, optimization, unit conversion and consistency checking, and uncertainty analyses. Built-in functions are provided for thermodynamic and transport properties of many substances, including steam, air, refrigerants, cryogenic fluids, JANAF table gases, hydrocarbons and psychrometrics. Additional property data can be added. EES also allows user-written functions, procedures, modules, and tabular data.


Use of EES in theEngineering College at UW-Madison

EES is no longer available for download to personal computers. The program can be accessed from computers on the CAE laboratory machines or from XENAPP

The EES manual is named ees_manual.pdf. Click on the link to view or copy it. If you put a copy of the manual in the EES directory, you can access it from the EES Mannual command in the Help menu.

Further Information  

Link to a YouTube channel that provides short tutorials on specific EES topics  

Download the Introduction to EES webinar. (Right click on download to save link to your computer.)  

Download the a webinar that provided instructions for accessing property information in EES.  

Download a document that provides an introduction to EES.  

Download Chapter 1 of the Mastering EES book which provides a detailed introduction to EES.  

Download the EES Workshop files.  

More information on EES and downloadable demonstrations.