INTRODUCTION. Council on Tall Buildings. and Urban Habitat

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2 INTRODUCTION 2

3 PingAn Financial Centre 118-storey super-high-rise building 600m in height with offices from 10/F to 112/F and observation deck/f&b outlets from 115/F- 118/F scheduled for completion by Figure 1 - Elevation of PAFC 3

4 PingAn Financial Centre 49 pieces of 0.8MVA -2.0MVA cast resin dry type transformers overall demand of 55 MVA Total 80 lifts including 45 double deck lifts for population of over 17,000 people Secure and reliable power supply, flexible and expedient elevator services and customer oriented sustainable design play an important role to: sustain operation of PAFC in good condition meet the needs of Class A tenancy at all times. Figure 1 - Elevation of PAFC 4

5 MAIN POWER SYSTEM 5

6 Multiple HV Infeed Power to the PAFC from different substations with 10kV feeders Duty-standby Feeders Total of 9 nos. of 10kV feeders Dual HV Risers - Running in two independent HV risers rising through the core of the building. Dual Tenant Risers - Dual LV busduct risers system feeding from different transformers sources. Segregation of Services Dry and wet trades will be segregated from each other. Service Strategy 6

7 Above-ground Transformer Siting the transformer substations on above ground mechanical floors. a 4500kg service lift tailor-made for vertical transportation of the transformers and their associated switchgear. Substation 7

8 9 nos dedicated 10kV electricity feeders to be supplied from different substations in Shenzhen region. Out of the 9 feeders, 6 of them will be duty feeders while the other 3 will be standby feeders. Transferred to a standby feeder by means of changeover switchgear. N+1 Power Supply 8

9 Emergency Power Supply Emergency generators are generally located at basement floors. 6 nos. 2000kW diesel generators will be provided to back up the landlord essential/life safety loads. 0.4kV LV generators will serve low zone. 10kV HV generators will serve mid zone and high zones. 10/0.4 kv step down transformers will be provided on high level mechanical floors to step down the voltage to 400V and distribute the emergency power to LV switchboards via automatic changeover switches. 9

10 VERTICAL TRANSPORTATION SYSTEM 10

11 Structure of Lift System 7 lift zones for the office floors. dedicated lift zone for the observation deck/f&b floor on the top floors. 900kg to 4500kg and 1.75m/s to 10m/s. 11

12 45 double-deck lifts provided for office floors:- Local Passenger Lifts 33 lifts of 1600kg/1600kg, 3.5-7m/s. Shuttle Passenger Lifts 12 lifts of 1800kg/1800kg, 7-9m/s. Lower car deck will serve even floors and upper car deck the odd floors. Double-deck Lifts 12

13 Strong wind effects during typhoon seasons create a complex oscillation and torsional movement of the building i.e. building sway. Barely perceptible to occupants but servely affect the roping systems of the lifts, When building sway is detected, the speed of the lifts will slow down progressively and ultimately stop and park at non-resonance floors if the sway is severe. Building Sway 13

14 Crowd Sensor Control Passengers arriving and leaving the sky-lobbies are closely monitored by the call destination control system and crowd detectors in lobbies. When more people arriving than people leaving, the departure trips will be prioritized compared to trips which bring people to skylobbies. Transportation of passengers to the sky-lobbies will be reduced until the lobbies are no longer overcrowded. CROWD SENSOR CALL DESTINATION CONTROL SYSTEM OVERCROWD IN SKYLOBBY NO NORMAL LIFT OPERATION YES HARMONIZE PERFORMANCE OF LIFTS ARRIVING AND DEPARTING SKYLOBBY 14

15 Sky-lobby Approach For Office Two sky-lobbies between Zone 3 / 4 and Zone 5 / 6. The 1st sky-lobby and 2nd skylobby will be both served by six 1800kg/1800kg high speed doubledeck shuttle lifts. Both of the shuttle lifts will terminate at B1/L1 as terminal floors for transportation of passengers directly to/from skylobbies. Super Double Deck Lift will be adopted to tackle the difference in floor-to-floor height of the terminal floors and the sky-lobbies. 15

16 Evacuation Mode Operation The two sky-lobbies located near to the refuge floors. Three shuttle passenger lifts for each of the sky-lobbies are assigned as evacuation lifts to assist evacuation. During emergencies, the assigned shuttle lifts will be switched to evacuation mode and manually controlled by fire wardens. The lower deck of the shuttle lifts could then be parked on the refuge floors and transport the occupants from refuge floors to ground floor directly. Dedicated VRV cooling system to ensure that the lift machine will not be overheated during emergencies. 16

17 CUSTOMER ORIENTED SUSTAINABILITY STRATEGIES 17

18 Customer Oriented Sustainability COS strategies aim at providing: comfortable, safe, trouble free and Strategies reliable operation to all occupants for years to come Targeted Customer Future Customer Requirement Base Building Design 18

19 Approach The maximum working pressure of the tenant airside terminal unit is limited to 160m head. The maximum working pressure of heat exchanger is limited to 250m head. Avoid further adding hydraulic zone, top office zone 6 and 7 is designed at 270m (equivalent to 400 psi) head. Hydraulic Zoning Figure 8 - Simplified chilled water schematic 19

20 Objective To utilize commercial available equipment and minimize pump power Approach Larger chilled water delta-t as 7C to 8C for each zone The CHWS is designed at 5.6C with 7C delta-t Top office zone CHWS is limited to 8.5C Heat exchanger with less than 1C temperature rise Result Estimated Annual energy saving of around 5% (all air-side and water-side equipment compared to the 5C delta-t system.) Hydraulic Zoning Figure 8 - Simplified chilled water schematic 20

21 Air-Cooled Chiller System & Tenant Emergency cooling for mission critical equipment Air-cooled chiller with generator back-up at intermediate mechanical floors plant room space at Basement 2 for anchor tenants dedicated generators Genset System 21

22 Three-pipe Reverse Return Objectives To minimize CHW supply interruption to other tenant during tapping of additional CHW for cooling-load For cooling-load-intensive floors, such as trading floor or IT server floor Approach Each tee-off is achieved by shutting down one of the three main risers at a time Figure 9 - Three-pipe reverse return system with standby pipe 22

23 All-air VAV System Objective Flexibility of different ceiling design and internal layout Approach Supply air plenum can be relocated easily to suit the new layout and by VAV re-zoning Objective Two AHUs resilience Approach Main supply air duct connected in a ring duct design 23

24 Building Energy And Energy Cost Objective Reduce Building Energy Cost Approach Utilize ice storage system (40,000 RTH) as per 60% discount for the off-peak electricity tariff policy in Shenzhen Result ice storage system operation cost saving estimated up to 15% compared to the chiller plant without ice storage system 24

25 Building Energy And Energy Cost Other Energy saving designs highlight High efficiency chillers with COP >= 5.6, Variable speed drives, CO2 sensor for optimizing fresh air control, High efficiency motors, High efficacy luminaries, Regenerative power from high speed lifts 25

26 Conclusion Power power supply strategies to enhance supply reliability and contain voltage drop; N+1 normal supply to minimize down time; centralized generator back-up for building and tenant s critical services to enhance supply availability; paralleled gensets to improve supply resilience; sky-lobby approach to improve building core efficiency. Elevator system high-speed double-deck lifts to optimize lift provisions; predictive lift control system to maximize passenger handling capacity; crowd sensor controls to avoid overcrowding in sky-lobbies during exceptional circumstances; building sway control to safeguard lift operation during typhoon seasons; evacuation lift provision to assist evacuation of occupants when required 26

27 Customer oriented sustainability Conclusion strategically planned hydraulic zoning to facilitate tenants selection of terminal units ; air-cooled chiller and tenant genset systems to support tenants mission critical equipment; 3-pipe reverse return chilled water riser system to minimize interruption of chilled water supply to tenants; all air VAV system to facilitate tenants fit-out design; installations such as ice storage system and high efficiency chillers etc to minimize building energy and energy cost. 27

28 Thank You Speaker: Tony Lau, Technical Director, JRP Limited 28