Switched linear control for refrigerant superheat recovery in vapor compression systems

Herschel C. Pangborn, Andrew G. Alleyne

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Extended durations of liquid refrigerant ingestion by the compressor of a vapor compression system (VCS) can lead to damage or failure of this component. While this can be prevented by inserting an accumulator between the evaporator and compressor, this addition of hardware may be undesirable for applications in which the weight or size of the thermal management system is critical. As an alternative, this paper proposes a switched Linear Quadratic Gaussian (LQG) design to quickly recover the presence of a superheated phase at the exit of the evaporator using feedback control. Stability analysis of the closed-loop switched system is presented, and application of the control approach in both simulation and on an experimental VCS testbed demonstrate the success of the control design.

Original languageEnglish (US)
Pages (from-to)142-156
Number of pages15
JournalControl Engineering Practice
StatePublished - Dec 1 2016

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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