Seminar 74 -- Numerical Challenges in Modeling of Vapor Compression Systems and Components PDF

This product is a zip file that contains files that consist of PowerPoint slides synchronized with the audio-recording of the speaker, PDF files of the slides, and audio only (mp3 format) as noted.

This seminar will explore the numerical and computational challenges, and the accompanying solutions, associated with modeling vapor compression systems and their components with an emphasis on compressor modeling. Speakers will explain the challenges resulting from the stiffness of the non-linear Ordinary Differential Equations (ODE’s) that govern the behavior ofpositive-displacement compressors. Additionally, an assessment of the most efficient compressor modeling platform will be presented. Finally, a study of the challenges associated with modeling the system dynamics of a complete vapor compression cycle will be presented.

1. Discussion of the Numerical Methods Used in Positive Displacement Comprehensive Mechanistic Models: Case Study Using the Z-Compressor
   Craig Bradshaw, Ph.D., Member1, Davide Ziviani, Ph.D., Member2 and Eckhard Groll, Dr.Ing., Fellow ASHRAE2, (1)Oklahoma State University, Stillwater, OK, (2)Purdue University, West Lafayette, IN
2. Quantitative and Qualitative Evaluation of Various Positive-Displacement Compressor Modeling Platforms
   Mohsin Tanveer, Student Member and Craig Bradshaw, Ph.D., Member, Oklahoma State University, Stillwater, OK
3. Challenges of Charge-Sensitive Dynamic Modeling and Control Scheme Implementations for Heat Pump Applications
   Tyler Shelly, Student Member, Davide Ziviani, Ph.D., Member, Justin Weibel, Ph.D. and Eckhard Groll, Dr.Ing., Fellow ASHRAE, Purdue University, West Lafayette, IN