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Introduction to EES (Engineering Equation Solver)
Introduction
EES is a powerful tool for solving engineering problems and is relatively easy to learn. It
is particularly useful in solving thermodynamic and heat transfer problems since it offers
several built-in libraries comprising of thermodynamic and thermophysical properties,
hence there is no need to look these values up in tables. Moreover, algebraic mistakes are
not a concern and the use of EES is time efficient in solving complicated engineering
problems. One major advantage to EES is that it can solve a system of simultaneous
equations, which is not easy to do using Excel. This includes a system with a transcendental
equation (i.e. one in which the dependent variable cannot be isolated).
This introduction is to help you get started with EES. If additional help is required, you can
refer to the Help Window within the software or the PDF manual available on line. To aide
in your introduction of the software an example problem from your textbook (Moran and
Shapiro) is solved using EES. The solution of the problem and description of specific
functions in EES are based on the PC version of EES, however there is little difference in
the Mac version. There are additional example problems listed under the Examples menu
in EES. When you are working on your homework sets, it may be useful to search for
similar problems in this menu.
Availability
EES is available on all IT lab computers. A free version is also available to all ME students
and other majors taking ME courses and can be downloaded directly from the following
website:
http://www.menet.umn.edu/dist/
When visiting this site, click on the ees folder. A user name and password will be required
to download the software. This information has been distributed in class and cannot be
placed on the course website. If you have misplaced or did not receive this information
please contact your course instructor or teaching assistant. The EES.DFT file is also
available on the server in case you need a new copy. All students who are new to EES must
download the EES.DFT file and copy it into the same directory/folder as the other EES
program. Free additions to EES are available if you visit the F-Chart Software website at
http://www.fchart.com.
Windows Installation
To install EES for Windows 95, 98, NT, 2000 or XP, you must run the file Setup_ees.exe.
Either double-click on the file or from the Windows Run Command using Browse until
you get to the directory where you stored the new EES setup program and run Setup_ees.
The file will install EES into the directory C:\EES32 or the directory you choose using the
Browse command. If you install into a directory other than your existing EES directory,
you must copy the file EES.DFT into your new EES directory.

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The latest EES manual is also on the menet server as a PDF file. The new version of EES
has a direct link to the manual, hence it is convenient to place the EES manual (EES
manual.pdf) in the EES directory.
Installing on a Mac
Download the EES_PPC.sea file into your EES folder, double click on the file and then
click the Extract button. The folder that EES is installed into must contain the file EES.DFT
for EES to run. The manual (EES Manual.sea.bin) is on the menet server. The expanded
manual must be placed in the same folder as the other EES files.
Getting Started
Begin by opening the EES program. Upon doing so, an empty Equations Window will
appear. If you see update information in Equations Window or the Equations Window does
not appear, obtain a new Equations Window by selecting New under the File menu. The
Equations Window is the window in which you write and edit equations. There are
additional windows available under Windows such as Formatted Equations Window and
Solution Window. The Formatted Equations Window is advantageous since it displays the
formatted equations form the Equations Window. When entering complicated equations,
this window can be useful to double check if any errors have been made. The Solution
Window appears automatically upon solution of the equations within the Equations
Window when the system of equations is solved via the Calculate command. Moreover,
the Solution window also indicates if any potential unit problems exist in the solution. The
Options menu consists of several commands that allow you to check your variables
(Variable Info), obtain commands for various built-in functions (Function Info) and
constants (Constants), declare a unit system (Unit System), and to set personal preferences
(Preferences). The Calculate menu involves the solution of the equations entered in the
Equations Window. Under this menu you can check the number of variables and number
of equations involved in the solution using the Check/Format command. Also, the set of
equations in the Equations Window can be solved using the Solve command. The Plots
menu involves the generation, modification, and type selection of plots. Similarly, the
Tables menu deals with generation and modification of tables by use of Parametric Tables
and Lookup Tables. The Plots and Tables menus will be described in further detail in the
solution of the example problem.

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Introduction to EES (Engineering Equation Solver) Introduction EES is a powerful tool for solving engineering problems and is relatively easy to learn. It is particularly useful in solving thermodynamic and heat transfer problems since it offers several built-in libraries comprising of thermodynamic and thermophysical properties, hence there is no need to look these values up in tables. Moreover, algebraic mistakes are not a concern and the use of EES is time efficient in solving complicated engineering problems. One major advantage to EES is that it can solve a system of simultaneous equations, which is not easy to do using Excel. This includes a system with a transcendental equation (i.e. one in which the dependent variable cannot be isolated). This introduction is to help you get started with EES. If additional help is required, you can refer to the Help Window within the software or the PDF manual available on line. To aide in your introduction of the software an example problem from your textbook (Moran and Shapiro) is solved using EES. The solution of the problem and description of specific functions in EES are based on the PC version of EES, however there is little difference in the Mac version. There are additional example problems listed under the Examples menu in EES. When you are working on your homework sets, it may be useful to search for similar problems in this menu. Availability EES is available on all IT lab computers. A free version is also available to ...
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