Identification and prevention of hazards caused by thermal expansions in vertical piping systems of air conditioning engineering for tall buildings;

Considerations about some common problems in installation and debugging of air conditioning engineering

Discussion on supervision work points in central air conditioning engineering

Problems concerning quality supervising of air-conditioning engineering;

Study on Energy Efficiency Ratio about Air-Conditioning Engineering of Commercial Building;

Pipe system installation and conjunction construction of air-conditioning engineering

Application of network chart optimization to construction of air conditioning projects;

Air duct made of polymer foaming board has been widely used in air-condition engineering as its advantages such as stable capability,non-combustible,smokeless,non-toxic,non-irritant,damp proof,sound insulation,heat preservation,good obturation capability,light and convenience to be made and installed.

On the basis of practical engineerings, this paper discusses a few typical problems of water system in the air conditioning system in Henan,which are the selection and layout of water pump,constant water flow systems used the module chiller and so on.

Lists some items of “Code for construction and acceptance of ventilation and air conditioning work”GB50243-97, analyses the meeting problems case by case when putting the code into practice, and gives corresponding suggestions to revise the code partially.