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Living in SustainabilityLiving in SustainabilityCase Sharing ofCase Sharing of

KwaiKwai ShingShing West EstateWest Estate

William HOChief Manager / Management (Project Management & Kwai Chung)

Franki MOKBuilding Services Engineer, Building Services Management Unit

7 October 2014

CONTENTCONTENT

(1)(1) IntroductionIntroduction

(2)(2) Project BackgroundProject Background

(3)(3) BEAM Plus Credit AnalysisBEAM Plus Credit Analysis

(4)(4) Way ForwardWay Forward

IntroductionIntroductionandand

Project Project BackgroundBackground

4INTRODUCTIONINTRODUCTION

Hong Kong Housing Authority (HA)Hong Kong Housing Authority (HA)

• Statutory body established in 1973 under the Housing Ordinance to develop and implement public housing policies

• Provides homes for over 2 million people• Over 740 000 flats in 205 public rental housing estates • About 1200 existing HA buildings• Around 44% built in 1980s or earlier


Maintenance Strategy:Maintenance Strategy:Maintenance for SustainabilityMaintenance for Sustainability• Sustainability is one of the key

maintenance strategy for PRH estates

• Timely maintenance and proper improvement works

Ensure a safe and pleasant living environment

Sustain lifespan and economic value of the buildings


Estate Maintenance & ImprovementEstate Maintenance & Improvement• Tie in with life cycle of estates and

constantly upgrade facilities to meet residents' needs

Comprehensive Structural Investigation ProgrammeEstate Improvement ProgrammeTotal Maintenance SchemeResponsive In-flat Maintenance SchemeLift Modernisation and New Lift Addition


Estate Management : Green LivingEstate Management : Green Living• Benchmark environmental performance

of existing PRH estates with international standards and scientific building assessment method:ISO 14001 Environmental Management SystemISO 18001 Occupational Health and Safety Management SystemISO 50001 Energy Management SystemGreen Roofs and Vertical GreeningFeasibility Study of Implementing BEAM Plus for Existing Buildings (EB)Pilot Implementation of BEAM Plus for EB


Pilot Implementation of BEAM Plus for EBPilot Implementation of BEAM Plus for EB

• In 2012, feasibility study for implementing BEAM Plus EB at two existing PRH estates was conducted

• In 2013, one of these existing PRH estates, Kwai Shing West Estatewas selected as pilot to obtain BEAM Plus EB certification


• In November 2013, Provisional Assessment submission was made

• In June 2014, Provisional PLATINUM rating under BEAM Plus for EB Version 1.2 was achieved

• First existing building to achieve this rating in EB category

Pilot Implementation of BEAM Plus EBPilot Implementation of BEAM Plus EB

10PROJECT BACKGROUNDPROJECT BACKGROUND

District : Kwai Tsing

Completion Year : 1975 - 1977

Estate Area : 85,000 m2

Domestic Flats : 5,260Population : 14,800 / Elderly : 4,430 (30%)

Ancillary Facilities :

Shopping Centre & MarketMulti-storey Car ParksPublic Transport TerminalCommunity HallPrimary Schools & Kindergarten

Type of Domestic Blocks :

10 Old Slab Blocks(7-25 storeys)

KwaiKwai ShingShing West EstateWest Estate

1111PROJECT BACKGROUNDPROJECT BACKGROUND

12

Challenges of Existing PRH EstatesChallenges of Existing PRH Estates• Building Constraints of Existing Layout & Structures

Existing refuse storage areas are not enclosed and does not fulfill PNAP APP-35 requirements for independent mechanical ventilation.

• Minimal Interruptions and Disturbance to Densely-populated Tenants

Residential flats are excluded from BEAM Plus assessment.

• Cost-effectiveness

PROJECT BACKGROUNDPROJECT BACKGROUND

BEAM Plus BEAM Plus Credit Credit AnalysisAnalysis

14BEAM Plus CREDIT ANALYSISBEAM Plus CREDIT ANALYSIS

• Under BEAM Plus EB Assessment, a weighting over different environmental performance is considered:

Site Aspects (SA)

Materials Aspects (MA)

Energy Use (EU)

Water Use (WU)

Indoor Environmental Quality (IEQ)

Innovations and Additions (IA)

Determination of Overall Grade in BEAM Plus EBDetermination of Overall Grade in BEAM Plus EB

15

3 credits70%70%70%75%Platinum

2 credits60%60%60%65%Gold

1 credit50%50%50%55%Silver

40%40%40%40%Bronze

Unclassified

IAIEQEUSAOverall Achievement

Rating

BEAM Plus CREDIT ANALYSISBEAM Plus CREDIT ANALYSIS

Determination of Overall Grade in BEAM Plus EBDetermination of Overall Grade in BEAM Plus EB

16

84.4 (>75%)Overall Score

5.0100%-5.06 BonusIA

22.325%89%9.811.0IEQ

8.615%57%4.07.0WU

29.930%100%20.020.1EU

4.512%38%3.08.0MA

14.118%78%12.516.0SA

Weighted Achieved Credits

Weighing Factor

% Achieved Credits

Achieved Credits

Applicable Credits

Category

Summary of Credits Achieved in KSW EstateSummary of Credits Achieved in KSW Estate

BEAM Plus CREDIT ANALYSISBEAM Plus CREDIT ANALYSIS

17BEAM Plus CREDIT ANALYSISBEAM Plus CREDIT ANALYSIS

• Improvement measures are grouped into 5 categories:Data and Records Gathering

• Environmental Purchasing Records, Waste RecordsProcedures / Manuals / Guidelines Development

• Tenant Guidelines / HandbooksSite Measurements

• Water Quality SurveyTechnical Studies

• Waste Audit, Energy Audit, Carbon Audit, Water Audit

Building Improvement Works

Improvement Measures for BEAM Plus EBImprovement Measures for BEAM Plus EB

18SITE ASPECTS (SA)SITE ASPECTS (SA)

• SA 1 Site SelectionSite Design

• Variety of building height (7-25 storeys) and mass (middle-rise blocks) harmonise with urban setting

• View corridor : stepped building profile allows view to natural landscape


Provision of Basic Services, Public Transport and Recreational Facilities

Public Transport


• SA 2 Emissions from Site

Level of intruding noise from site

• Complies with criteria recommended in the Hong Kong Planning Standards and Guidelines


• Management and Maintenance PracticesEnvironmental Purchasing Plan and Practices (SA P1 & SA 5)

• Environmental procurement principles, Purchasing records of environmentally friendly materials, products

Health, Safety and Environmental Management (SA 4)

• ISO 14001 Environmental Management System

• ISO 18001 Occupational Health and Safety Management System

Effective Operations and Maintenance Systems (SA 6, SA 7, SA 8 & SA 9)

• Proper O&M programme and procedures• Adequate staffing and resources• Comprehensive tenants’ guidance

ISO 14001 : 2004Certification on

21 Jan 2013

22MATERIALS ASPECTS (MA)MATERIALS ASPECTS (MA)

• Selection of Materials Use of products that avoid use of ozone depleting substances (MA 6b)

• E.g. Roof Insulation Materials, Fire suppression materials

Non-applicable Credits:• No centralised A/C : CFC-refrigerants (MA P1)• Existing building : Building reuse (MA1), standardised

design (MA2), adaptability for deconstruction (MA3)• Waste Management

Provision of Waste Recycling Facilities (MA P2)Waste stream audit (MA 7a)Environmentally responsive waste management system (MA 7b)

23WATER USE (WU)WATER USE (WU)

• Monitoring and ManagementWater Quality Survey (WU P1)

• Water sampling tests conducted for all common areas

Minimum Water Saving Performance (WU P2, WU 1 & WU 6)

• Use of water efficient devices• Building improvement works

Water Conservation Plan (WU P3)• Water sampling tests conducted for all common

areasWater Audit (WU P5)

24WATER USE (WU)WATER USE (WU)

• Replacement of water cisterns and urinal flush value from single flush to dual flush system (WU 6)


DUAL FLUSH URINALS DUAL FLUSH W.C. AUTO-SENSORY WATER TAPS

• Auto-sensory water taps for public toilets (WU 1)

25INDOOR ENVIRONMENTAL QUALITYINDOOR ENVIRONMENTAL QUALITY(IEQ)(IEQ)

Improvement Measures under IEQ• Security (IEQ 1)

Security Measures and Facilities : CCTV System• Hygiene (IEQ 2, 4)

Plumbing and Drainage• Proper system design, operation and maintenance

Waste Disposal Facilities• Modification of existing refuse storage areas

• Indoor Air Quality (IEQ 8c, 12, 13a)Compliance of ventilation requirements in estate management office, toilets & refuse rooms and common area

• Thermal Comfort (IEQ 15a)Thermal simulation for naturally ventilated pubic areas

• Lighting Quality (IEQ 18)Lighting simulation in common or service spaceCompliance with CIBSE guide or HA standard.


Building Improvement Work under IEQWaste Disposal Facilities (IEQ 4)

• Existing refuse storage areas are not enclosed and do not fulfill requirements in PNAP APP-35

• Modification is required


• Addition of independent mechanical air filtration system for all existing refuse storage areas



• Building Amenities

Access for Persons with Disability (IEQ 22)

• Improvement works have been carried out to meet requirements in Design Manual : Barrier Free Access 2008 as far as practicable

Improvement Measures under IEQ

29Improvement of Barrier-free Access

30Improvement of Barrier-free Access

31

1) Aim : Adapts buildings which have no lifts for aging population

Estate Improvement Estate Improvement ProgrammeProgramme

Footing Construction Steel Frame Installation

Addition of New Lift Towers

Cladding Installation

2) Difficulties : No additional loading on existing buildings potential nuisance and disturbance to tenants

3) Solutions : Prefabricated steel structures, Raft footings, Machine-room-less lifts

4) Results : Reduce cost, time, waste, pollution and disturbance

32Estate Improvement Estate Improvement ProgrammeProgrammeAddition of Covered WalkwayAddition of Covered Walkway

33INNOVATIONS AND ADDITIONS (IA)INNOVATIONS AND ADDITIONS (IA)

• Performance Enhancements (IA 2)Implementation of Innovative and Proactive Maintenance Schemes

Responsive In-flat

Maintenance Services

Total Maintenance

Scheme

日常家居維修服務全方位維修計劃

34

Three-pronged approach :

• Proactively identify maintenance problems and repair

• Prompt response to tenants’maintenance requests

• Enhanced promotional and education programmes

Total Maintenance Scheme

35Total Maintenance Scheme

36INNOVATIONS AND ADDITIONS (IA)INNOVATIONS AND ADDITIONS (IA)

Responsive In-flat Maintenance Services (RIMS)• Modelled on TMS, RIMS

aim to provide enhanced and responsive in-flat maintenance services for all public rental housing tenants.

• Inspection ambassadors visit flats and carry out repairs proactively

• Comprehensive maintenance database

• Activities to educate tenants

Request by Users Process of Request

Arrange Inspection Site Inspection

Maintenance Works Works Completion

37

3 credits70%70%70%75%Platinum

2 credits60%60%60%65%Gold

1 credit50%50%50%55%Silver

40%40%40%40%Bronze

Unclassified

IAIEQEUSAOverall Achievement

Rating

ENERGY USE (EU)ENERGY USE (EU)

Determination of Overall Grade in BEAM Plus EB

38

84.4 (>75%)Overall Score

5.0100%-5.06 BonusIA

22.325%89%9.811.0IEQ

8.615%57%4.07.0WU

29.930%100%20.020.1EU

4.512%38%3.08.0MA

14.118%78%12.516.0SA

Weighted Achieved Credits

Weighing Factor

% Achieved Credits

Achieved Credits

Applicable Credits

Category

Summary of Credits Achieved in KSW Estate


39ENERGY USE (EU)ENERGY USE (EU)

1515Reduction of CO2Emission

EU1

Due to the absence of peak electricity demand data

NANAPeak Electricity Demand Reduction

EU2

The carpark area is less than 10% of total CFA

NANA(2)

Ventilation System in Car Park

EU3

The carpark area is less than 10% of total CFA

NANA(2)

Lighting System in Car Park

EU4

Constraints in existing layout and structural provision

NA5 BRenewable Energy system

EU5

RemarksAchieved

Credits

Applicable Credits

Assessment Elements


No bonus credit obtained for energy charge

4 + 1 B4 + 2 BEnergy ManagementEU10

11Testing and commissioning for non-HVAC system

EU8b

No A/C units provision except the small EMO

NANA(1)

Air-conditioning UnitsEU6

Excluding residential buildings

NANA(1)

Metering and Monitoring for Electrical Loads

EU9a

Credits were already obtained in EU1

NANA(2)

Energy Efficient Appliances

EU7

RemarksAchieved

Credits

Applicable Credits

Assessment Elements

41

EU1 Reduction of CO2 Emission• All 15 Credits are obtained as

reduction of annual CO2 emission by 20% achieved:

44.1% annual energy reduction for domestic blocks (91.14% of total CFA)26.7% for carpark (3.80% of total CFA) 92.7% for shopping centre (4.88% of CFA)


42

EU 8b Testing and Commissioning

• 1 Credit for non-HVAC system and equipment

On-going testing, maintenance and necessary adjustment for all building services systems are being carried out.


43

• Credits attainable– 1 credit for Energy Audit (Awarded)– 1 bonus credit for carbon audit (Awarded)– 1 credit for monitoring and targets (Awarded)– 1 credit for energy management plan (Awarded)– 1 credit for energy management manual (Awarded)– 1 bonus credit for separate energy charge (Not

awarded)


EU 10 Energy Management Plan



CHECK METER SYSTEM

• Installation of electricity check meters and provision of measurement facilities such as current transformers (CTs) and voltage leads to monitor electrical energy usage of major electrical loading


• Public lighting replacement using energy efficient product – electronic ballast with registration under EMSD’s Energy Efficiency Labeling Scheme


BULKHEAD LIGHT FITTINGS C/W ELECTRONIC BALLAST

46Trends of Energy Consumption

47

Way ForwardWay Forward

48WAY FORWARDWAY FORWARD

• In June 2014, Provisional PLATINUM rating under BEAM Plus for EB Version 1.2 was achieved

• Final Assessment Submission preparation is on-going

Preparation for Final Assessment SubmissionPreparation for Final Assessment Submission

49Green Living in Kwai Shing West Estate: Green Roof & Vertical Greening

• Increase of Green Ratio to 27% of the site area in the Estate

• To provide vertical greening at low rise structures such as the pump houses and refuse rooms

50

• To arouse tenants’ awareness of energy conservation and environmental sustainability by installation of Environmental Protection Window

• Installation of a used LCD panel at ground floor lift lobby of all domestic blocks to show the periodic consumption of:

- Electricity- Gas- Water

Tenants’ Education :Awareness on Energy Use

51Close Communication with StakeholdersClose Communication with Stakeholders-- Community Engagement WorkshopsCommunity Engagement Workshops

52Community Engagement WorkshopsCommunity Engagement Workshops

53Estate Improvement ProgrammeChildren Play Equipments & Elderly Fitness

Equipments

Replacement of play equipment installed in or before year 2000Provision of mixed elderly & children play equipment in the same playgroundNew elderly equipment : 13 (40%)New children play equipment : 20 (60%)

Existing Playground in KSW Estate

One of the Existing Playgrounds

54

PROPOSED DESIGN

Community Engagement Workshop– Open Space Design

EXISTING CONDITION PROPOSED DESIGN

EXISTING CONDITION

55Improvement of Elevated Walkwaysat Blocks 6 & 9

Art works by children from neighbourhood school

56

To enhance sustainability of public housing in economic, environmental and social aspects.

To improve and monitor sustainability performance and direct it towards sustainability excellence.

OUR SUSTAINABILITY POLICYOUR SUSTAINABILITY POLICY

Thank youThank you

Q & AQ & A

60

• Simulation method – Performance –based Building Energy Code (PBEC) was adopted to calculate the baseline model annual energy

• Zero-credit model is considered to be equal to baseline model annual energy scale up to 150%

CREDIT ANALYSISCREDIT ANALYSIS

Energy Use (EU)Energy Use (EU)

EU1 Reduction of COEU1 Reduction of CO22 EmissionEmission

61

• As stipulated in BEAM Plus manual, this part of the assessment will only be applied to those buildings where electricity charges are based either Bulf Tariff, Large Power Tariff or maximum Demand Tariff. Buildings not using one of these tariffs will not be assessed for peak electricity demand. Hence, the credits under EU2 shall be not applicable (N/A) due to the absence of peak electricity demand data for the whole of KwaiShing West Estate



EU2 Peak Energy Demand ReductionEU2 Peak Energy Demand Reduction

62

• The following documentations have been provided to substantiate our ongoing plan for T&C in a systematic and continuous practices

Maintenance Programme for BS Systems;Energy Management System Manual;Energy Management Process Manual; andAnnual Inspections and Testing Reports.


EU 8b Testing and Commissioning

63

• 1 credit for conducting Category 3 energy audit;• 1 credit for energy monitoring and targeting

system (demonstrated by energy audit reports)• 1 credit for management plan and its resources

allocation to improve the energy performance of the estate

• 1 credit for energy management manual• 1 bonus credit for conducting carbon audit



EU 10 Energy Management PlanEU 10 Energy Management Plan


• Obtained ISO 50001 (EnMS) Certification in June 2013

• Adopt a “Plan-Do-Check-Act” approach for continuous improvement to raise energy consumption efficiency

ISO 50001 Energy Management System (EnMS)

Thank youThank you

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