This paper analyses the problems about the control of the mechanical smoke extraction system,and discusses the problem about smoke fire dampers and smoke exhausting fans.

Comparison of different methods of ventilation and smoke exhaust in underground parkings;

Analysis on ventilation and smoke exhaust for civil air defense underground garages;

Discusses on ventilation and smoke exhaust system design for basement of highrise civil buildings;

In the article we not only analysed the theory of flue gas condensation, but also studied the theory that the various parts of flue gas was absorbed and purified in the course of the flue-gas condensation.

Aimed at the fact that the wall temperature of heat exchanger is lower than the dew point of flue gas, the thermal energy utilization system for flue gas of positive draft gas boiler is proposed.

The discussion on the problems of ventilation and exhaust smoke in high-rise building underground garage;

Study on utilizing the remains of heat of the exhaust smoke from boilers used in ships;

Obtains the relationship curves of smoke temperature with the height of model atrium by smoke tests under natural ventilation,supply air in upper zone,exhaust smoke in lower zone and combined with upper supply and lower exhaust conditions.

Exhaust ventilation and smoke extraction design for underground garages;

Design of ventilating and smoke extraction system in underground garage of Huli water amusement park;

Design of ventilation and smoke extraction system for civil air defense underground garages;