Share

A momentum-zonal model for predicting zone airflow and temperature distributions to enhance building load and energy simulations.

Author(s) : GRIFFITH B., CHEN Q.

Type of article: Article

Summary

Building load and energy simulation programmes based on the complete-mixing air model fail to consider the impact of nonuniform air temperature distributions. A momentum zonal model based on the Eüler equation has been developed to enhance building load and energy simulations by predicting indoor airflows and temperatures. This article shows some validation exercises by comparing model results to measurements and computational fluid dynamics. The model was found to predict thermal stratification conditions reasonably well and to err on the side of complete mixing. The model has been coupled to the heat balance model and tested on load calculations. Results for cooling and heating loads are compared with the traditional complete-mixing model with minor effects on total load but important differences in air system flow rate and control options. Total computation times for load calculations were two orders of magnitude higher using the momentum zonal model compared with traditional complete mixing.

Details

  • Original title: A momentum-zonal model for predicting zone airflow and temperature distributions to enhance building load and energy simulations.
  • Record ID : 2004-2395
  • Languages: English
  • Source: HVAC&R Research - vol. 9 - n. 3
  • Publication date: 2003/07
  • Document available for consultation in the library of the IIR headquarters only.

Links


See other articles in this issue (6)
See the source

Indexing