A software package for steady-state simulation of drying processes is described. A brief review of the simulator structure, along with an outline of its operation is presented. User input to the simulator consists of three parts; the flowsheet description-ie, the process units and the streams connecting them; the design problem data-ie, the feed stream data, the specifications of unit design variables and major economic figures concerning cost; the convergence algorithm specifications-ie, the tear streams and an initial guess for their values. This information is passed to the simulator by means of an appropriate user interface developed in object-oriented Pascal code on an Apple Macintosh computer. This part of the program is then introduced into the execution part of the simulator, performing all the necessary flowsheet computations. A case study is also presented for the design of a dehydration plant for vegetable drying.