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What is CATT3 and How to Use It
CATT3 stands for Computer-Aided Thermodynamic Tables 3, a software that allows you to access electronic thermodynamic tables of water, air, gases, refrigerants and psychrometry. It is a useful tool for students and professionals who need to solve problems related to power plant engineering, thermodynamics, heating ventilating and air conditioning, industrial plant engineering, and many other topics.
In this article, we will explain what CATT3 is, how it works, and how to use it effectively. We will also provide some examples of how CATT3 can help you with your calculations and analysis.
What is CATT3
CATT3 is a software that was developed by Dr. Michael J. Moran and Dr. Howard N. Shapiro, authors of the textbook Fundamentals of Engineering Thermodynamics. It is based on their book's appendices, which contain extensive thermodynamic tables for various substances and properties.
CATT3 allows you to access these tables electronically, without having to flip through pages or interpolate values manually. You can enter the substance and the property you want to find, and CATT3 will display the corresponding value or values in a table or a graph. You can also perform calculations using CATT3's built-in functions, such as entropy generation, heat transfer, work, efficiency, etc.
CATT3 covers a wide range of substances and properties, including:
Water and steam (saturated, superheated, compressed liquid)
Air (ideal gas)
Gases (ideal gas mixtures, real gases)
Refrigerants (R-12, R-22, R-134a)
Psychrometry (moist air)
CATT3 also has some features that make it more user-friendly and convenient, such as:
A graphical user interface (GUI) that is easy to navigate
A help menu that provides instructions and examples
A unit conversion tool that allows you to switch between SI and English units
A data export option that lets you save your results in a text file
How to Use CATT3
To use CATT3 effectively, you need to follow these steps:
Download and install CATT3 on your computer. You can find the download link in the description of this video[^1^] or this video[^2^]. The installation process is simple and straightforward.
Open CATT3 and select the substance you want to work with from the drop-down menu. You can also change the units if you prefer.
Select the property or properties you want to find from the list of options. You can choose one or two independent properties (such as pressure and temperature) or one dependent property (such as enthalpy or entropy).
Enter the value or values of the independent properties in the input boxes. You can use either exact values or ranges.
Click on the \"Calculate\" button to display the results in a table or a graph. You can scroll through the table or zoom in/out of the graph as needed.
If you want to perform calculations using CATT3's functions, click on the \"Function\" button and select the function you want to use from the list. You can then enter the required inputs and click on the \"Calculate\" button again.
If you want to export your results to a text file, click on the \"Export\" button and choose a location and a name for your file.
Examples of Using CATT3
To illustrate how CATT3 can help you with your problems, here are some examples of using CATT3 for different purposes:
Example 1: Finding Properties of Water
Suppose you want to find the specific volume, internal energy, enthalpy and entropy of saturated water at 100 kPa. To do this using CATT3, you would:
Select \"Water\" from the substance menu. 061ffe29dd