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Modification and Validation of a Universal Thermodynamic Chiller Model Used to Evaluate the Performance of Water-Cooled Centrifugal Chillers
Abstract
This paper presents modifications made to the
procedure used to develop a universal
thermodynamic model of chillers (Gordon and Ng,
1995). The modifications were necessary to capture
physical phenomena involved when water is the
coolant fluid at the condenser. The model was
developed as a tool for analyzing chiller
performance. It was designed to predict the
coefficient of performance (COP) and the total
electrical energy consumed by the compressor. The
input parameters included time-series values of
condenser temperatures, evaporator temperatures,
and evaporator loads. The modifications were
validated with data from monitoring two chillers
operating at two institutional campuses: one a South
Texas high school, and the other, a Northwest
Arkansas university. The results showed that the
average steady-state measured and predicted
parameters differed by no more than 2 percent. This
paper presents a literature review, model
development, experimental set-ups. results, and
summary and conclusions.
Citation
Figueroa, I. E.; Cathey, M.; Medina, M. A.; Nutter, D. W. (1998). Modification and Validation of a Universal Thermodynamic Chiller Model Used to Evaluate the Performance of Water-Cooled Centrifugal Chillers. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from https : / /hdl .handle .net /1969 .1 /6716.