Air intake and exhaust volume of civil air defense power station

What is exhaust stack & air intake design?

Exhaust Stack and Air Intake Design Strategies........................................................................... air enters a building through its air intake to provide ventilation air to building occupants. Likewise, building ex-haust systems remove air from a building and expel the contaminants to the atmosphere.

What is the difference between relief airflow and intake airflow?

Relief airflow removes air from the building (again, either centrally or locally) to balance intake airflow and maintain proper building pressure. Intake airflow describes the rate at which the air handler brings air into the building.

How dilution can a stack exhaust provide?

The dilution a stack exhaust can provide is limited by the disper-sion capability of the atmosphere. Before discharging out the stack, exhaust contamination can be reduced by filters, collectors, and scrubbers to maintain acceptable air quality.

Can large buildings affect stack exhaust dilution?

Large buildings, structures, and terrain close to the emitting build-ing can adversely affect stack exhaust dilution, because the emitting building can be within the recirculation flow zones downwind of these nearby flow obstacles (Wilson et al. 1998a).

How is airflow modulated in a VAV box?

Airflow from each VAV box is modulated based on the dry-bulb temperature detected by the thermostat in each occupied space. Local exhaust fans and exfiltration remove a percentage of air from occupied spaces; the rest (including “infiltrated” air) returns to the air handler, usually by way of a ceiling-plenum return.

Does air supply mode affect the ventilation performance of a generator hall?

The air distribution and ventilation performance of the generator hall are influenced by the air supply mode [ 21 ]. To investigate the ventilation performance under various schemes, the velocity nonuniformity coefficient, temperature nonuniformity coefficient, and energy efficiency coefficient were selected as the evaluation indices in this study.