Switched linear control for refrigerant superheat recovery in vapor compression systems

Herschel C. Pangborn, Andrew G. Alleyne

Research output: Contribution to journalArticle

Abstract

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
Volume57
DOIs
StatePublished - Dec 1 2016

Fingerprint

Linear Control
Refrigerants
Evaporators
Compressors
Compaction
Recovery
Compression
Vapors
Compressor
Testbeds
Temperature control
Feedback control
Thermal Management
Switched Systems
Hardware
Control Design
Testbed
Feedback Control
Closed-loop System
Stability Analysis

Keywords

  • Superheat recovery
  • Switched linear control
  • Vapor compression system

ASJC Scopus subject areas

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

Cite this

Switched linear control for refrigerant superheat recovery in vapor compression systems. / Pangborn, Herschel C.; Alleyne, Andrew G.

In: Control Engineering Practice, Vol. 57, 01.12.2016, p. 142-156.

Research output: Contribution to journalArticle

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