Predictive and diagnostic methods for centrifugal chillers

Jayaprakash Saththasivam*, Kim Choon Ng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


This paper describes how the performance of chillers can be predicted by the Simple Thermodynamic Model (Gordon-Ng Universal Chiller Model) at steady state conditions that span across assorted coolant temperatures. It focuses on diagnostic capabilities of the simple thermodynamic approach using the published data from a 90-ton centrifugal chiller. Five different types of degrading chiller faults (reduced condenser water flow, condenser fouling, refrigerant overcharge, non-condensable in refrigerant and excessive oil in compressor) were succinctly detected by the model based on physically meaningful parameters of chillers.

Original languageEnglish (US)
Pages (from-to)282-287
Number of pages6
JournalASHRAE Transactions
Volume114 PART 1
StatePublished - 2008
Externally publishedYes

ASJC Scopus subject areas

  • Mechanical Engineering
  • Building and Construction


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