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Simulation and electricity savings estimation of air-cooled centrifugal chiller system with mist pre-cooling
- Source :
-
Applied Energy . Apr2010, Vol. 87 Issue 4, p1198-1206. 9p. - Publication Year :
- 2010
-
Abstract
- Abstract: This paper analyses how to apply mist pre-cooling coupled with condensing temperature control to enhance the coefficient of performance (COP) of an air-cooled chiller system and hence achieve electricity savings. A modified DOE-2.1E chiller model was developed to predict the change of chiller COP due to various set points of condensing temperature and pre-cooling of air stream entering the condenser. The model was calibrated by using manufacturer’s data and used to estimate the annual electricity consumption of a chiller system serving an office building under four operating schemes: traditional head pressure control (HPC); HPC with a fixed mist generation rate; condensing temperature control (CTC) with a fixed mist generation rate; CTC with an optimal mist generation rate. It was estimated that using optimal mist control with CTC could achieve a 19.84% reduction in the annual electricity consumption of the system. Considerations when using mist pre-cooling to maximize electricity savings have been discussed. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 03062619
- Volume :
- 87
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Applied Energy
- Publication Type :
- Academic Journal
- Accession number :
- 47362079
- Full Text :
- https://doi.org/10.1016/j.apenergy.2009.08.023