NIST Time|NIST Home|About NIST|Contact NIST

HomeAll Years:AuthorKeywordTitle2005-2010:AuthorKeywordTitle

Airflow and Radon Transport Modeling in Four Large Buildings.


pdf icon Airflow and Radon Transport Modeling in Four Large Buildings. (1609 K)
Fang, J. B.; Persily, A. K.

CH-95-16-3;

ASHRAE Transactions, Vol. 101, No. 1, 1995.

Sponsor:

Environmental Protection Agency, Washington, DC

Keywords:

air flow; building technology; contaminant dispersal; indoor air quality; mechanical ventilation; modeling; multi-family residential; multi-zone; office buildings; radon; ventilation

Abstract:

Computer simulations of multizone airflow and contaminant transport were performed in four large buildings using the program CONTAM88. This paper describes the physical characteristics of the buildings and their idealizations as multizone building airflow systems. These buildings include a twelve-story multifamily residential building, a five-story mechanically ventilated office building with an atrium, a seven-story mechanically ventilated office building with an underground parking garage, and a one-story school building. The air change rates and interzonal airflows of these buildings are predicted for a range of wind speeds, indoor-outdoor temperature differences, and percentages of outdoor air intake in the supply air. Simulations of radon transport were also performed in the buildings to investigate the effects of indoor-outdoor temperature difference and wind speed on indoor radon concentrations.