REFRIG-12: A graphics-augmented interactive program for designing vapor-compression refrigeration/heat pump cycles

REFRIG-12 is an interactive program that serves as a tool for designing and analyzing thermodynamic vapor compression refrigeration/heatpump cycles. Graphic and alphanumeric responses to design decisions are displayed simultaneously on separate monitors. Temperature-Entropy property coordinates are used to describe the thermodynamic processes Freon-12 undergoes as it passes through the various mechanical components which ultimately produce the cycle. The processes are displayed graphically as the user makes the decisions to design a refrigeration cycle. When a design has been completed, REFRIG-12 offers the user an opportunity to make changes. The effects of design changes become graphically discernible through successive overlays on the graphics monitor. DOTPLOT can be executed to produce a hard copy of the graphics monitor display. Summaries of the cycle performance, pertinent energy transfers, and other engineering consequences of the design specifications can also be presented - at user option - on both the CRT and the printer. REFRIG-12 is organized so that a relatively small main program controls 25 subroutines. Each subroutine has stand alone characteristics and may be used with programs having other primary purposes. The subroutines can be conveniently merged (or chained) into system memory as needed.