Testing and selection of VAV terminal units;

Describes an air conditioning system with chilled water storage, in which fan coil units and water source heat pumps are integrated as the terminal unit.

The cooling sources,and the under-floor air distribution systems with fan-powered terminal units applied in the typical office floor including the layout of the air conditioning system,the arrangement of different zones and the distribution of terminal units,etc.

This paper mainly introduces the characteristic of VAV system and types of its terminal equipment,and methods of calculating the minimum air volume.

Designers should emphasize the noise impact of all the devices on indoor acoustical environment while designing VAV systems from determination of the type and operating point of the fan in an air conditioning unit to selection and installation of VAV terminal devices,supply air diffusers and duct components.

This paper discusses some problems of VAV system, including conception, development and its advantages, several control strategies of VAV system,outdoor air control, terminal devices selections and VAV applied areas.