queen elizabeth ii courts of law brisbane...dec 02, 2014 · queen elizabeth ii courts of law...

Queen Elizabeth II Courts of LawBrisbaneAIRAH Site Visit December 2, 2014

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Client Queensland GovernmentDepartment of Justice and Attorney General

Architect Architectus + Guymer BaileyManaging contractor Lend LeaseProject value $570 millionConstruction value $325 millionProject program June 2007 – June 2012

Aurecon scope – Engineering Consultancy Services• Mechanical Electrical

• Structural Fire

• Fire Engineering Civil

• Acoustics Facades

Project summary

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"…it is the most important public building to be erected in Brisbane for a century…"

Chief Justice Paul de Jersey

• Gross floor area: 64,000m² • Air conditioned area: 40,000m²• 19 levels• 42 courts• 800 staff• 64 custodial cells • 4 totally separate circulation systems (judges, custodial, jury, and

public)• ESD: equivalent to 5 star Greenstar (no public building tool during

design)

Building summary

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Queen Elizabeth II Courts of Law

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Custody and carparks (Basements)

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Entry and administration (Ground to L2)


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Court Levels (L3 to L10)



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Plant level (L11)

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Plant level (L11)

Library (L12)

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Plant level (L11)

Library (L12)

Chambers (L13 to L16)

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The ‘simple daylight filled’ solution

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Mechanical Services:• Chilled water plant• Air conditioning• Mechanical ventilation• Data centre cooling• Domestic hot water• Smoke control ventilation• BMS

Mechanical services contract value: AU$35 million

Mechanical services summary

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• Mechanical services contractor: Siganto and Stacey• BMS: Schneider Electrical• Chillers: Carrier• Cooling towers: BAC Pritchard• Water treatment: Hydrochem• Air handling units: Air Design• Fans: Fantech• CRAC units: Stulz• VAV boxes: Holyaoke• Circular floor grilles: Trox• Linear bar floor grilles: Holyoake• Ceiling induction diffusers: Dadanco

Mechanical services summary

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• 5,565kW capacity• 1,500m³ thermal energy

storage• Carrier 23XRV water cooled

variable speed tri-screw chillers

• BAC cooling towers• Variable speed

primary/variable speed secondary chilled water pumping system

Chilled water plantSummary

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Chilled water plantBMS graphic

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• Chilled water: - 6 / 14C- 166 L/s

• Condenser water: - 29.5 / 37.5C- 199 L/s

Chilled water plantPlant room

Chillers

Primary and condenser water pumps

Secondary chilled water pumps

TES heat exchanger

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• Underground stratified chilled water tank

• 1,500 m³ volume• 6,000kWh thermal storage• 100 l/s water flow• 300kW electrical demand

reduction

Thermal energy storage

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Thermal Energy Storage CFD analysis

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Thermal Energy Storage Actual temperature profile from BMS

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1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

6 7 8 9 10 11 12

Sensor Height

Temperature Deg C

10am

4am

1pm

2am

3pm

12am

6pm

9pm

11pm

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Court room air conditioningTypical court room

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• Supply air: 19°C• Return air: 28°C• CO2 controlled outside air• On-floor AHU provides

sensible coolingDOAS provides 18°C pre-conditioned and dehumidified outside air

• Ceiling: 4,200mm

Typical courtroom design loads:• Area: 180m²• Population: 73 people (2.5 m²/p)• Supply air: 1,900L/s (10.5 L/s/m²)• Outside air: 820L/s (11.25 L/s/p)• Equipment load: 3,800W (21 W/m²)• Lighting: 2,520W (14 W/m²)• Task lighting 470W (3 W/m²)

• Very high design loads, unlikely to be often realised• Allowance for future virtual ‘eCourt’ equipment loads• Typically not more than 30 people in a court

Court room air conditioning Displacement Ventilation

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• Fan speed: 70%• Room temperature: 22 – 23°C• Supply air temperature: 20 – 21°C• Return air temperature: 24°C• CO2 concentration: 500 – 600 ppm• Outside air: 30% of supply air • Relative humidity: 50% - 60%

Note limited stratification due to high design heat loads and which are typically not realised

Court room air conditioningDisplacement Ventilation - Typical operating values

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Design target at Judges location: PMV <0.5

IES and CFD modelling

Comfort factors• Temperature• Radiant temperature• Humidity• Air movement• Personal preference• Clothing

Court room air conditioningComfort design

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• Design based on ASHRAE ASHRAE ‘UFAD Design Guide’

• Validated using CFD modelling

• CFD extensively used to validate design and to study grille layout options

Court room air conditioningAdvanced analysis

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Court room air conditioningBanco Court

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Court room air conditioningCourt of Appeal

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Court room air conditioningRaised plenum floor

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• 800mmm floor void for all services to be reticulated services

• Installed on levels ground to level10

• 600x600 grid system• Prototype floor section

fabricated to validate construction and coordination

• Pressure testing of floor plenum

Court room air conditioningRaised plenum floor

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Court room air conditioningInfloor ductwork

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Displacement and mixing airflow Trox FBA grille

Floor grillesCircular Trox floor grilles

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• AirDesign ModuThermmodular double skin air handling units

• Variable speed direct drive Ziehl plug fans

• Plenum pressure loss• Tonal noise issues• Supply air duct connection

on underside of AHU

AHU design

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• Supplies preconditioned/dehumidified air to DV/UFAD systems

• Run-around coils to reduce sub-cooling/reheat for humidity control

Outside air preconditioningDedicated Outside Air System (DOAS)

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Outside air preconditioningDedicated Outside Air System (DOAS)

Sub‐Cool / Reheat Run around coil

Cooling 514 kWr 381 kWr

Chiller ‐ electrical power 86 kW 64 kW

Reheat – electrical power 98 kW 0

Fan power 8 kW 10 kW

Total electrical power 197 kW 79 kW

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• Supply air: 18°C• Return air: 26°C• CO2 controlled outside air• Trox circular floor grilles –

set to vertical mode• Typical ceiling: 2,700 to

3,000mm ceilings

Ground, L1, L2 - Administration Levels Under Floor Air Distribution

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• Low temperature VAV (overhead)

• Supply air: 11°C• Return air: 24°C• CO2 controlled outside air• Ceiling mounted swirl

diffusers• Typical ceiling: 2,850mm

Chambers and Library Floors - Levels 12 to 16Low temperature VAV

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• 1000mm cavity• Internal glazing: double

glazed IGU (SHGC=0.4, U=1.7)

• External glazing: 16mm with 50mm gaps

• Automatic external blinds for solar control

• Manually operated internal blinds for glare reduction

Dynamically adaptable double skin facade

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• Fire engineered solution• Smoke exhaust to maintain

smoke layer on public floors • Smoke spill to provide

sandwich pressurisation to office floors

• Fire stair pressurisation

Smoke spill and exhaust

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Car park ventilation – CO controlled

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Building energy consumptionComprehensive Energy Metering System

Jul‐12 Aug‐12 Sep‐12 Oct‐12 Nov‐12 Dec‐12 Jan‐13 Feb‐13 Mar‐13 Apr‐13 May‐13 Jun‐13 Total

Power 0 86,115 118,745 125,369 140,570 137,585 143,815 129,054 143,070 135,669 130,676 78,732 1,369,400 21%

Lights 190,222 130,326 152,404 154,091 127,928 110,738 102,740 107,618 105,533 123,231 107,992 65,125 1,477,948 23%

HVAC 103,442 137,502 149,072 150,997 190,981 232,193 264,315 202,373 248,019 359,683 166,521 91,031 2,296,129 35%

Lifts 6,888 7,296 9,796 9,949 9,982 9,066 8,729 9,210 9,983 9,150 10,190 5,475 105,714 2%

Fire 467 2,014 4,730 5,056 4,913 5,095 5,100 4,605 5,135 5,023 4,307 2,179 48,624 1%

Hydraulic 864 1,433 1,372 1,636 1,884 2,966 3,041 2,636 2,467 2,426 2,917 1,111 24,753 0%

UPS 90,519 84,774 113,815 114,844 100,358 95,604 93,972 92,922 96,631 92,882 99,179 55,756 1,131,256 17%

Tenancy 1,024 623 1,308 1,573 6,432 11,548 12,323 11,591 11,826 11,100 11,988 6,440 87,776 1%

Total W/m² 11 12 15 15 16 17 17 15 17 20 15 8 179

TOTAL 393,427 450,081 551,241 563,517 583,048 604,795 634,034 560,011 622,664 739,166 533,770 305,849 6,541,600

queen elizabeth ii courts of law brisbane...dec 02, 2014 · queen elizabeth ii courts of law...

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