Cascaded Superheat Control with a Multiple Evaporator Refrigeration System Conference Paper uri icon


  • Variable refrigerant flow (VRF) systems are increasingly being used in commercial buildings in preference to chilled water or ducted air systems. The closely coupled dynamics of VRF systems, however, create a need for effective control strategies to ensure safe and effective operation. Of particular interest is the regulation of evaporator superheat. In this paper a cascaded architecture for controlling superheat is applied to a multiple evaporator system, and compared to traditional PID-controlled evaporators. The effects of the architecture on dynamic coupling are explored, and efficacy is demonstrated with experimental results. 2011 AACC American Automatic Control Council.

name of conference

  • Proceedings of the 2011 American Control Conference

published proceedings


author list (cited authors)

  • Elliott, M. S., Estrada, C., & Rasmussen, B. P.

citation count

  • 6

complete list of authors

  • Elliott, Matthew S||Estrada, Carolyn||Rasmussen, Bryan P

publication date

  • January 2011