Abstract
Convergent calculation is possible using Microsoft Excel. It has advanced program functions. Then I have developed a new program technique that is called 'Objectinized Cells Method'. System simulation of the air conditioning unit is enabled by this new method. Furthermore, I developed non-steady thermal load calculation technique within the spread sheet. Non-steady heat conduction equation is solved by the finite volume method. The air conditioner and thermal load calculations are analyzed at the same time. The temperature and humidity of the chamber, and the air conditioner's blast temperature is obtained by result of calculation. Calculation is executed every 2 minutes. These principal parts are calculated within the spread sheet, and macro are only used rarely.
