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Dynamic model of a centrifugal chiller system: model development, numerical study, and validation.

Author(s) : BENDAPUDI S., BRAUN J. E., GROLL E. A.

Summary

The paper presents the development of a centrifugal chiller system model, using the finite-volume approach for shell-and-tube heat exchangers and aspects such as mesh dependence, integration order, and step size. Sufficient and necessary mesh sizes for accurate steady-state prediction are determined for the heat exchangers. Execution speeds with integration algorithms of the first, second, and fourth order are compared for equivalent accuracy. The model is based on first principles, allowing it to be used over a wide range of operating conditions and transients. The model is validated using data from a 90-ton R134a centrifugal chiller.

Details

  • Original title: Dynamic model of a centrifugal chiller system: model development, numerical study, and validation.
  • Record ID : 2006-2555
  • Languages: English
  • Source: ASHRAE Transactions. 2005 Winter Meeting. Volume 111, part 1 + CD-ROM.
  • Publication date: 2005

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