
ABSIM makes it possible to investigate various cycle configurations with different working fluids, to calculate their operating parameters, to predict their performance and to compare them with each other on a uniform basis. « lessĪBSIM (an acronym for ABsorption SIMulation) is a user-oriented computer code designed for the simulation of absorption systems at steady state, in both flexible and modular form. The other package incorporates a general front-end, called IISIBat, that is a general simulation tool front-end. One package closely resembles the DOS version and includes TRNSHELL for Windows and PRESIM for Windows. Several organizations worked on this conversion that has resulted in two distinct Windows packages. Therefore, the next logical step in increased usability was to port the current TRNSYS package to the Windows operating system. Most TRNSYS users operate on PC computers with the Windows operating system. The increase in usability leads to a decrease in the time necessary to prepare more » the simulation. PRESIM, which allows the graphical creation of a simulation system, and TRNSED, which allows the easy sharing of simulations.

These programs include TRNSHELL, which encapsulates TRNSYS functions. This package represents a significant step forward in usability due to several graphical utility programs for DOS. Each physical component in the system, such as a pump or solar collector, is represented by a different FORTRAN subroutine. TRNSYS, commercially available since 1975, is a computer program used primarily to simulate thermal energy systems.
