Fast Simulations of Air Conditioning Systems Using Spline-BasedTable Look-Up Method (SBTL) with Analytic Jacobians
Lixiang Li, Jesse Gohl, John J. Batteh, Christopher M. Greiner, Kai Wang · Linköping electronic conference proceedings · 2020
Refrigerant property calculation has a significant impact on the computational performance of vapor compression cycle simulations.In a previous publication, the authors have described the Modelica implementation of a Spline-Based Table Look-Up Method (SBTL) for fast calculation of refrigerant properties.This implementation demonstrated significant improvement in computational speed for a range of complex air conditioning system models.This paper describes further development of the SBTL method to allow the generation of analytic Jacobians.The new implementation with analytic Jacobian capability is tested on a range of air conditioning system models and demonstrates significant further improvement of computational speed when compared to the original SBTL model.