Welcome to the Smart Thermodynamic Table: Infra-Red Band Radiation page, part of the 'Utility Applets' library of TEST, The Expert System for Thermodynamics. TEST is a network of HTML pages with embedded Java Applets that helps users solve thermodynamic problems and perform parametric studies visually without any programming.

The Infra-Red Band Radiation Applet currently handles CO2, CO, H2O and a blackbody.

To determine radiation from a particular band, you choose the species first, then choose a particular band from all the available bands, enter the path-length, temperature, total and partial pressures, and click the 'Calculate' button.

The examples below contain images of the Infra-Red Band Radiation daemon in action. Once you get a rough idea about how it works, you can start using the real thing by following these instructions.

There are two ways of doing anything, the quick way and the right way.

If you are in a hurry, do the following: (a) Browse the examples below (takes only a minute), and (b) Launch the customized Java applet (called a daemon) by clicking the appropriate link at the top of this page. If you have a modern browser (Netscape 4.5 or better, Microsoft IE 4.0 or better), the daemon will appear in about 10-50 seconds (1 second if you are running from a locally installed TEST) and you can start exploring.

To fully exploit TEST follow thest steps: (a) Start the Introduction/Turorial for the Expert System by clicking the link at the top of this page. (b) Explore a few daemons as explained in the tutorial. (c) Browse a few topics of your choice from the Slide Show. (d) Once you understand the algorithm TEST applies for locating the right daemon for a given problem, you can use the TEST-Map to quickly launch a desired daemon. Of course, all these may take better part of an hour - but, trust me, you will not regret it.

 

Example-1:Find the emission from a 100 cm long column of CO2, at a temperature of 2000 deg Farhenheit, and 100 kPa pressure for the 4.3 micron band.  Solution:To bring up the appropriate daemon click the 'Smart Infra-Red Band Radiation Applet' link at the top.  As the daemon gets loaded, you may see its shadow for about 5-15 seconds.    Fig. 1. Image of the Infra-Red Band Radiation Daemon producing solution to Example 1. Check the WaveLength checkbox. Choose CO2 as the species. Select (click on) 4.3 micron from the list. Input the temperature, pathlength, total and partial pressure in the given units. In this case the partial and total pressure are both 100 kPa. Click the 'calculate' button. The band intensity is 4511 W/m2.sr.

 

Example-2:Find the tatal radiation from the gas column of Ex. 1. Solution: Simply choose the '0-inf: total' band from the band list. 'Calculate' to produce the desired answer.  Fig. 2. Image of the Infra-Red Band Radiation Daemon producing solution to Example 2.

These examples are only meant to give the reader the flavor of a daemon (applet). Many more examples of solved problems, grouped into fifteen different chapters, can be found under TEST Home Page> TEST> Problems page. Before you start using this particular applet, it is strongly recommended that you take a look at the 'Slide Show' to get a feel for the breadth of thermodynamic topics TEST covers. Besides more examples and a visual tour, you will also find a visual manual for the daemons explaining different buttons and widgets found in the daemons. You will see how a wide range of thermodynamic problems can be visually solved and parametrically studied without the need for a single line of programming.