fan-coil
3.Calculation and comparison between the fan-coil add new air system and VRV system were proposed in the paper.
8.Takes several energy saving measures for air conditioning system, nick a large capacity centrifugal chillers working with variable frequency nil capacity chillers, variable frequency and variable flow control on secondary pump water systems, cooling tower for four-pipe water system in winter, fan-coil unit for commercial peripheral zones aid all-air systems for interior zones, variable frequency control on supply and exhaust air fain, enthalpy control on fresh air cooling in winter and intermediate season.

