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Computer Simulations of Airflow and Radon Transport in Four Large Buildings.


pdf icon Computer Simulations of Airflow and Radon Transport in Four Large Buildings. (2571 K)
Fang, J. B.; Persily, A. K.

NISTIR 5611; 46 p. April 1995.

Sponsor:

Environmental Protection Agency, Washington, DC

Available from:

National Technical Information Service
Order number: PB95-220422

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 airflow and radon transport in four large buildings were performed using the multi-zone airflow and pollutant transport model CONTAM88. These buildings include a twelve-story multi-family 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 mechanically-ventilated school building. Interzone airflow rates and radon concentrations are predicted in these buildings as a function of wind speed and direction, indoor-outdoor temperature difference, and ventilation system operation. Ventilation system factors that are studied include the operation of exhaust fans in the apartment building and variations in the percent outdoor air intake in the office buildings. Simulations in the office buildings are also made with the ventilation systems off and with variations in the balance of the supply and return airflow rates.