Welcome to the Smart Thermodynamic
Table: R-11
software module, part of the 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 Smart Thermodynamic Table is more than a visual
thermodynamic state calculator for refrigerant-11. In this R-11 table
a state is visually presented (see the examples below) as a collection
of variables (such as p, T, v, h, s etc.). Known variables are entered
in any order and in any units (see Fig. 3) and a click on the Calculate
button evaluates the states partially or fully (including phase composition)
if sufficient information is entered. The calculated states are auto-saved
and can be plotted on a p-V,
T-s or
other thermodynamic diagrams by choosing a plot-type from the diagram selector
(see Fig. 2).
While evaluating two related states (say, two
isentropic states), algebraic expressions involving state variables can
be used. For instance, to evaluate State-2,
isentropic to State-1,
one can enter s2
as =s1.
Once a series of states are evaluated, updating all calculations for a
change in any input variable is a snap. Simply change the value and click
on the Super-Calculate
(see Fig. 4) button. In addition to update all calculations, a printer-friendly
output is generated on the Output window of the daemon (see Fig. 2).
Because all the State variables are exposed,
changing one or more input variables and evaluating their effects is really
a matter of two clicks (Calculate
and Super-Calculate)
, making TEST an exciting visual design tool for the What-If
people.
A more comprehensive introduction can be found
in the Tutorial page and is highly recommended for all users.
The examples below contain images of the R-11 table in action. Once you get a rough idea about how the smart table
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 from a TEST-CD) and you
can start exploring.
To fully exploit TEST follow these steps: (a)
Browse the Slide Show (at least the first 20-30 slides); (b) Start the
Tutorial and get a hands-on training on your favorite daemon (do not forget
to read both the Theory and Practice pages). (c) Explore a few daemons
systematically as explained in the tutorial. (e) Once you understand the
TEST algorithm, you can use the TEST-Map to quick-start a desired daemon.
(f) If you like using the software, please register (from the Home page)
as a courtesy. (g) For better speed and service, acquire a TEST-CD or a
site license. Of course, all these may take better part of an hour - but,
trust me, you will not regret it.