FIELD-STUDY ON THE INDOOR THERMAL ENVIRONMENT AND CARBON-MONOXIDE LEVELS IN A LARGE UNDERGROUND CAR PARK

Results of an indoor environment survey in, a large underground car pa rk in Hong Kong are reported in this paper. Field measurements were di vided into three parts: (1) assessment of the thermal environment; (2) measurement of the carbon monoxide concentration; and (3) a survey on , thermal comfort. The indoor air temperature, relative humidity, inst antaneous air speeds, turbulence intensity, and carbon monoxide concen tration at different locations in the car park. were measured. Design and operation of the installed ventilation systems were studied and th e number of cars staying at the car park was investigated. Correlation relationships between the mean carbon monoxide and the mean. air spee d, the turbulence intensity, and the number of cars entering or leavin g the car park were derived. Field studies of this kind are very impor tant for providing ventilation system design data.