In order to analysis the reasonable structure of adding hot wind window and it s effect on ventilation cooling system, the network analysis method was adopted to analyze the ventilation cooling system.

Based on the body modal test,natural frequencies and mode shapes of two types of body with / without windscreens are obtained.

The heating and ventilation system of 3600mm eight-cylinder paper machine;

Considering the increased demand of plastic doors and windows at present time, with the experience of five departments design for plastics extrusion, hereafter we worked out the detailed solutions for the department of plastics extrusion, for the reference to the related designers, as designs of heating and ventilation; compressed air system and chilling system.

In this paper, it gives the meteorology parameters of basic wind pressure, heating and ventilation, outdoor air-conditioners and the architectural lightening coefficient in Nanning and Guilin, by calculation and analysis of the climate parameters involved architecture design in Guangxi.

The steam air heater is often used for preventing low-temperature corrosion and ash clogging in the boiler,but different influence upon economic efficiency of unit in operation may be resulted by different parameters of the said steam air heater.

Through analysis of operation parameters concerning the fan and inspection of the secondary air system,it is believed that the main cause was the increase of steam air heater s resistance,making the resistance in secondary air system of the boiler to be increased.

Constructional character and problems in coiled steam air heater of coal-fired boilers is analyzed and a thinking of new type of tube in tube air heater is proposed.