VRV air conditioning for this project was selected for its ability to sustain long pipe runs, space-saving capabilities, flexibility of installation and economic installation costs compare with a chilled-water system of similar capacity.
The new store has five floors and is an innovative combination of new build and existing Grade 2 listed structures with attractive visual effect.
There are 15 VRV systems comprising a mix of heat-recovery, heat-pump and mini VRV-S types selected according to the cooling and heating requirements of the various floors and areas.
Heat recovery is used for the restaurant, TV/audio, basement and open-floor sales areas. Mini VRV-S systems serve smaller areas such as reception and interview rooms. The two communications rooms have Sky Air Super Inverter systems. All other floors are served by heat-pump systems.
The mini VRV systems have cooling/heating capacities of 11.2/12.5 kW. Heat-recovery and heat-pump systems have cooling/heating capacities of 22.5/55 kW. All the VRV outdoor condensing units are at third- and fourth-floor levels.
Conditioned air is supplied by ceiling cassettes, ceiling ducted and wall-mounted fan-coil units, the last being in the listed buildings — where there are no ceiling voids.
External packaged air-handling units with DX coolers and gas-fired heaters deliver tempered air (25% fresh air and 75% recirculated) to each conditioned area.
The total cooling and heating loads are 250 kW and 75 kW, respectively. Internal design temperatures are 22°C ±2 K in summer and 20°C ±2 K in winter.
Overall control is provided by a Daikin I-manager in the building manager’s office and linked by a Daikin BACnet Gateway to the store’s BMS. Local temperature control is provided by remote, wall-mounted room controllers and temperature sensors in the room return-air grilles.
For more information on this story, click here: April 08, 127
Keywords: air conditioning Daikin VRV
