Sage Simulation Model for Technology Demonstration Convertor by a Step-by-Step Approach

The development of a Stirling model using the 1-D Sage design code was completed using a step-by-step approach. This is a method of gradually increasing the complexity of the Sage model while observing the energy balance and energy losses at each step of the development. This step-by-step model development and energy-flow analysis can clarify where the losses occur, their impact, and suggest possible opportunities for design improvement. Starting with the simplest Technology Demonstration Convertor (TDC) Stirling model, the energy flows and losses are shown at each step. In one of the steps, sub-cases were developed to investigate the sensitivity of the model to certain parameters. These sub-cases are helpful in clarifying the characteristics of the specific model and contribute to the accuracy of the simulation results. Finally, the model predictions were compared with TDC data, and then calibration parameters were adjusted to improve agreement with the data.