E-CodeRadiation exchange, 3-surface enclosure — a TI-84 Plus CE program
RADENC is a TI-BASIC program for the TI-84 Plus CE. Gray diffuse enclosure with a re-radiating third surface: radiosities from a 3x3 matrix solve, net heat rates, re-radiating temperature.
What it asks for and what it shows
It asks for 7 values at its prompts. In the example below it shows Q1 W, Q2 W, T3 K, J1, J2, ENERGY BAL OK.
Example run
One of its oracle test cases: “gray triangular duct”. The inputs are typed in order, and the results are the values the case expects on the screen.
| Step | Value |
|---|---|
| You enter | |
| Input 1 | 800 |
| Input 2 | 400 |
| Input 3 | 0.8 |
| Input 4 | 0.6 |
| Input 5 | 1 |
| Input 6 | 1 |
| Input 7 | 0.5 |
| The screen shows | |
Q1 W= | 9677.439008 |
Q2 W= | -9677.439008 |
T3 K= | 709.3276115 |
J1= | 20806.49387 |
J2= | 7903.241857 |
| Text | ENERGY BAL OK |
How it's checked
5 test cases, each checked against an independent method. Replayed key by key on a virtual TI-84 Plus CE, they make 30 checks.
How E-Code checks every program
Run it or put it on your calculator
- Open the library in the TI-84 Plus CE calculator and pick “Radiation exchange, 3-surface enclosure” (RADENC).
- Put it on your own calculator with a computer and a USB cable, or type it in by hand.
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All TI-84 Plus CE engineering programs · All TI-84 Plus CE programs