Guests at the stunning new, design led Hilton Manchester Deansgate Hotel will not only enjoy stylish, contemporary décor; they will also benefit from the unrivalled comfort associated with state of the art Daikin water-cooled VRV-WII air conditioning.
Due for completion shortly, the hotel forms part of a visually striking 171 metre high residential development complex, known as the Beetham Tower which is said to be the tallest UK residential building outside London. The hotel takes up the 5th to 23rd floors of the 43 storey tower, the remainder being given over to 220 luxury apartments and an innovative 24th floor Sky Bar.
Installed by Daikin D1 installers, Booth Imperial Ltd, Bolton, air conditioning for the hotel’s 285 bedrooms, reception, restaurants and meeting rooms etc is provided by 25 Daikin water-cooled heat recovery VRV-WII condensing units, supplying a total of 328 Daikin indoor fan coil units. A further three air-cooled VRVII systems serve the landlord’s ground floor reception facilities for the apartment accommodation.
Each of the hotel’s guest accommodation floors is served by a heat recovery type RWEYQ condensing unit (nominal capacity 26.70kW and 31.50kW cooling and heating respectively), housed in a service cupboard and linked to 15 fan coil units located in bulkheads above the bedroom doors. The condensing units for the public areas are located in a podium plant room. Each unit is connected by a two-pipe flow and return water circuit to LPHW boiler plant and an air-cooled heat rejection chiller at rooftop level. Mains water at between 20 and 35°C is supplied to the circuit via a pressurisation unit. The chiller cuts in when the temperature exceeds 35°C and shuts down when it reduces to 32°C.
During the heating cycle, heat is absorbed from the water circuit and transmitted via a plate heat exchanger within the condensing unit casing to the refrigeration circuit and then to the indoor fan coil units. Conversely, during cooling, heat is rejected to the water circuit and exhausted to atmosphere by the chiller, which cools the water to within the design temperature parameters. Heat recovery is achieved by utilising heat absorbed from the water circuit for indoor units in heating mode and rejecting heat to the water circuit from indoor units in cooling mode.
Daikin water-cooled VRV-WII air conditioning was selected for this project because a conventional chiller/LPHW based 4-pipe fan coil system would not meet Part L Carbon emission requirements and a major redesign of the building would (at the time) have been necessary to overcome this problem. Also, the VRV-WII system provides the client the added benefit of the Enhanced Capital Allowance and its attendant savings in capital outlay.
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