ENGINEERINGa Sustainable
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1947 saw the foundation of theEngineering Society of HongKong. The Society flourished andas a result the Hong KongInstitution of Engineers (the HKIE),was incorporated by Governmentunder Ordinance in 1975. TheHKIE is now the only professionalengineering body in Hong Kongwith membership over 20,000 ofwhich nearly 10,000 are in thegrade of Corporate Membership.
The Institution sets standards forthe training and admission ofengineers under 18 Disciplines. Itis committed to promote ethicsfor professional engineers and hasstrict rules governing its members'conduct. As a learned society, theInstitution enables members tokeep abreast of the latestdevelopments in engineering andto engage in continuingprofessional development, andthese activities are mainlyorganised by 16 Divisions.
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The Institution has been devotedto community and social services.The HKIE nominates members toserve on various external boardsand committees of GovernmentDepartments and highereducation institutions. It alsoprovides constructive commentsand professional views onGovernment's consultationpapers. The profession also hasone seat representing theE n g i n e e r i n g F u n c t i o n a lConstituency in the LegislativeCouncil through which views ofthe profession can be expressedto the Government.
The HKIE has established closerelationship with engineeringinstitutions throughout the world.It has signed agreements forco-operation and agreementsfor the mutual recognition ofqualifications with the Mainlandand overseas engineeringinstitutions. It is also members ofsome international engineeringfederations.
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The notion of sustainability arouses growing concern in the whole world. The fact is that we live underthe same sky and breathe the same air. We all have the responsibility to cherish and conserve ourenvironment while continuing our social development, for the benefits of us as well as our futuregenerations.
In recent decades, the Hong Kong engineering profession has strived to attain a balance betweendevelopment and environmental protection. Their success has been remarkable, which was depicted ina series of the HKIE Road Shows staged at some major shopping centres in March and April 2006.
To show our dedication to sustainability, we have made use of the materials presented in the HKIERoad Shows to publish this booklet, with a view to further disseminating the message to the community.It is not a simple cut-and-paste exercise. Hours of editing and production works have been spent on it.Moreover, we are pleased to have received very positive responses from our sponsors and their enthusiasmtowards the publication of the booklet is highly appreciated. I hope you will enjoy reading this interestingand meaningful booklet.
Ir WONG Kwok LaiPresidentThe Hong Kong Institution of Engineers
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• Our professional engineers,with advanced scientificknowledge and specialisedtechnical skills, endeavour toshape Hong Kong as aprosperous international cityby building world-classinfrastructure.
• We are dedicated to makinga safe, green and pleasantliving environment for HongKong.
• We will work hand in handwith all sectors of thecommunity to achieve asustainable future for HongKong.
������ ���Engineers' Commitment to Sustainable Development
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Sustainable Development is"development that meetsthe needs of the presentwithout compromising theability of future generationsto meet their own needs".
This means:• finding ways to increase
prosperity and improve thequality of life while reducingoverall pollution and waste;
• meeting our own needs andaspirations without doingdamage to the prospects offuture generations; and
• reducing the environmentburden we put on ourneighbours and helping topreserve common resources.
./0�� 1What is Sustainable Development?
£½¾¿ÀÀÁ¾ÃĤÅÆÇ~Renewable Energy andRecycled Materialsfor a Sustainable Future
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Renewable EnergyRenewable energy is "clean energy that is derived from natural processesthat are replenished constantly". Unlike fossil fuels such as coal, oil and natural gas,renewable energy does not cause global warming. It can be harnessed from energy sourcessuch as the wind, sun, ocean waves, geothermal energy, and running water.
Recycled MaterialsRecycling construction and demolition materials helps to reduce negative impacts toour environment, including global warming, production of atmosphericpollutants and hindrance of economic development resulting from wastageof natural resources. More importantly, it forms an essential part of sustainable development.
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Solar power has beenharnessed in Hong Kong formore than 20 years forwater heating and electricity.
Sheung Shui Slaughterhouse hasbeen designed by engineers tomeet strict hygiene standards ofthe European Community andthe US Depar tment o fAgriculture, by which 450 solarpanels are installed to pre-heatwater supplying the daily use of630 cubic metres of hot water.
The Geotechnical EngineeringOffice of the Civil Engineeringand Development Departmentmaintains 86 solar-powered raingauges in Hong Kong. And thevegetation on a roadside slope iswatered automatically by a solar-powered water pump. ����Water Tank
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Wind energy is environmentally friendly as it producespower without generating emissions.
Hong Kong's first commercial-scale windpower station was commissioned in Tai Lingon Lamma Island in February 2006. Theproject, undertaken by The Hongkong ElectricCo Ltd, is expected to generate aboutone million units of electricity andsupplant the need to burn 350tonnes of coal annually. The 24-storeyhigh wind turbine can generate electricitywhen the wind blows at 3 to 25 metres persecond. It has been estimated that it will be
in operation 89% of the time. The exhibition area inside thewind power station also provides a wealth of information on
renewable energy.'()*+,-�./012)3+,-Lamma Winds –– The FirstWind Power Station in Hong Kong
ST)UV6WXRecycling Construction and Demolition Materials
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3R Model (Reduce, Reuse andRecycle) is widely promoted as astrategic waste management to ensuresustainable development in future.
About 12 million tonnes of constructionand demolition materials are generatedevery year and recycling of these materialsis crucial to sustainable development ofHong Kong. Recycling construction anddemolition materials (C&DM) helps to cut
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down on the waste of natural resourcesand reduces the need for quarrying andon the other hand, to protect ourenvironment and conserve natural resourcesfor future generations.
Recycled aggregates are good constructionmaterials with physical properties compatiblewith virgin aggregates. They are applicablefor various construction applications.
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Use of BiogasBiogas generated duringsludge digestion is tappedfor various uses in variousconfigurations at sewage treatmentworks (STW) operated by theDrainage Services Department atShek Wu Hui, Sha Tin and Tai Po.More than 7.8 million cubicmetres of biogas is generatedannually at these three sewagetreatment facilities.
At Shek Wu Hui STW, biogas isused to enhance the sludge mixing
and digestion process, as wellas for water boilers
t o m a i n t a i nt h e o p t i m u mtemperature forsludge digestion,w i th su rp lus
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flared off through waste gasburners. Biogas will be furtherutilised through the installation ofCombined Heat and Power (CHP)generating set for delivery ofboth electricity and thermalenergies for plant uses.
At Sha T in STW, b iogasgenerates electricity for airblowers, dewatering machines andpumps, with exhaust gas used forheating water to maintain thetemperature of the sludgedigesters.
At Tai Po STW, biogas is harnessedfor water boilers and air blowers.Feasible ways of maximising theutilisation of biogas in Tai Po STWare under study.
N������Shatin Sewage TShatin Sewage Treatment Wreatment WorksN������Shatin Sewage Treatment Works
Use of Landfill GasProduced with thebiodegradation of wasteat landfills, landfill gas is apotential health hazard if notproperly controlled, but it is aviable alternative energysource which can help reduceour dependency on fossil fuelssuch as coal, oil and natural gas.
At Ta Kwu Ling landfill in theNorth East New Territories (NENT),landfill gas is harnessed asheating fuel for industryafter the treatment process
comprising compression,
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removal of carbon dioxide, waterand trace components andodourisation. 3,300 cubicmetres of landfill gas isextracted every hour fromNENT landfill and is usedf o r e l e c t r i c i t ygeneration and totreat hazardousleachate (a high-strengthwastewater).
Starting from 2006, the HongKong and China Gas CompanyLimited has been using landfillgas from Ta Kwu Ling as analternative heating fuel toproduce towngas, after thetreatment process comprisingcompression, removal of carbondioxide, water and tracecomponents and odourisation.
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����'�|}�Ngong Ping Tertiary Sewage Treatment Works
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To protect the water quality of the water gathering ground for Shek PikReservoir and other receiving water bodies on Lantau Island, the DrainageServices Department built Hong Kong's first tertiary sewagetreatment plant in Ngong Ping.
This plant adopts the Sequencing BatchReactor (SBR), dual media filterand disinfection processes toreduce organic pollutants, suspendedsolids, nutrients and pathogenicorganisms in sewage to a very low level.
The tertiary treated effluent becomesreclaimed water after chlorination,which will be used for flushing in publictoilets in Ngong Ping and for rearing fishand controlled irrigation within NgongPing Sewage Treatment Works.
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�yz¿À§¨ÁÂÃÄ�¿ÀFÅ©ÆÇ8�¨ÈÉ�ÊË�FUsing different media in the dualmedia filter for further removal ofthe remaining pollutants
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The high quality of the treated effluent fromNgong Ping Sewage Treatment Works providesa good opportunity for conducting a pilot trialon effluent reuse. Reclaimed water is used forflushing in the public toilets in Ngong Ping, theCable Car Terminal and the associated touristfacilities.
The benefits of reclaimed water,include:• save water;• better quality water for irrigation;• better use of treated effluent; and• protect our environment.
Reclaimed water is widely used in othercountries for irrigation, landscaping, cooling,road cleaning, car washing and firefighting.
ÌRS�Í«�ÎÏ�ÐÑÒÓÑÂÔReclaimed water is used for flushing in public toilets
�¨�Õ§ÖÂRS�Ò×ØÙÚÕÛÂReclaimed water is used in a fish pond insidethe plant for rearing aquarium fish
/Ü�Ý6¦ÂRS��ÞßJapan is the leader in urban water reuse
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,ȨNÉÊËĹºÌÍWorld-classInfrastructurefor ContinuingProsperity
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Our engineers aim to make Hong Kong a safe, green and prosperousinternational city by constructing world-class infrastructure.
Hong Kong engineers have demonstrated their capability to design,construct and operate infrastructure that makes the maximumuse of materials, while minimising damage to theenvironment.
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ÑÒÓ�ÉÔHong Kong Wetland Park
g���à�á�â0ã�ÐäHong Kong Wetland Park in Tin Shui Wai in the New Territories
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�è{éêmëWater CooledAir-conditioning Plant
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The Wetland Park and Visitor Centre of AFDis the first pilot project of theArchitectural Services Departmentto use recycled aggregates inconcrete, among many environmentalobjectives consistent with the theme of theproject. This is also the first building inHong Kong with an extensive useof concrete incorporated recycledaggregates AC system.
A geothermal heat pump air-conditioning system (GHPAC)exchanges heat with the ground.It makes use of the ground as a source ofheat when heating is needed and rejectsheat into the ground when cooling isrequired. The ground thus serves as a largeheat sink. 25% energy-savings areachieved through the use of GHPAC,compared with a conventional coolingtower.
Natural lighting is by means of skylight(north light) at Central Atrium and externaltoilets. Artificial lighting is minimised toreduce power consumption.
Low capacity, 6-litre water closetsare used to reduce water consumption inthe toilets, while rainwater is used for
flushing toilets in the satellite building. Waterconsumption is further reduced by recyclinglake water for the water features at the park.
Other energy saving installations such asphotovoltaic panels for oscillating fans in BirdHides, T5 fluorescent tubes with electronicballasts, occupancy sensors for Office lightings,CO2 sensors for fresh air supply, temperaturesensors in Galleries and Atrium for switchingto natural ventilation mode, wind sensors fortoilet ventilation, photo cells for artificial lightingin Atrium, rain sensors for automatic irrigationsystem, VVVF drive for lift installation and variablespeed drive condensing water pumps, etc.
ã�Ðä¨�&ìíîCentral Atrium in Hong Kong Wetland Park
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��ïð�����ñò� Ä`óôõ�����&ö�÷ÊY÷ø¸ùúûThe Stonecutters Island STW is The Stonecutters Island STW is the most compact and efthe most compact and efficient CEPT plant in the worldficient CEPT plant in the world�ïð�����ñò� Ä`óôõ�����&ö�÷ÊY÷ø¸ùúûThe Stonecutters Island STW is the most compact and efficient CEPT plant in the world
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�$�ÒÕÖ×sØHarbour Area Treatment Scheme Stage I
��L�����à]����Lµ������©���� !The Sludge Treatment Facilities have a totareatment Facilities have a total production capacity of 900 tol production capacity of 900 tonnes of sludge cake at 35% drynnnes of sludge cake at 35% dryness per dayess per day�L�����à]����Lµ������©���� !The Sludge Treatment Facilities have a total production capacity of 900 tonnes of sludge cake at 35% dryness per day
The Harbour Area Treatment Scheme (HATS)Stage I is responsible for cleaning up sewagegenerated every day by 3.5 million peopleon both sides of Victoria Harbour. A 23.6-kilometre network of deep tunnels,which is the shortest route to convey sewagein order to minimise nuisance to the publicduring construction, transports sewage fromKowloon and the northeast part of HongKong Island to Stonecutters Island SewageTreatment Works (STW) for treatment. Thetreated effluent is discharged into thewestern approaches of Victoria Harbourvia outfall. This world-class infrastructureprevents 600 tonnes of pollutants,enough to fill 40 containers, from beingdumped into Victoria Harbour everyday.
Since mid December 2001, over 70% ofsewage generated by the people of HongKong is now receiving high qualitychemically enhanced primary treatment (CEPT)or biological (secondary) treatment beforedisposal, compared with only one-thirdbefore.
Sewage is chemically treated at StonecuttersIsland STW, which removes 80% ofthe suspended solids and 70%Biochemical Oxygen Demand inthe sewage. A centralised treatmentplant not only lowers its operating costsbut also stays out of sight of thegeneral public. "ð6÷´���#�
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Q$%&Environmental Awards
Hong Kong-Shenzhen WesternCorridor (HK-SWC) is a 5.5-kilometre long dual 3-lanecarriageway (Hong Kong sectionis 3.5 kilometres whereas theShenzhen section is 2.0 kilometres)linking Dongjiaotou at Shekou withDeep Bay Link in the northwesternpart of the Hong Kong NewTerritories to Yuen Long Highway.
EnvironmentConsiderationsSince HK-SWC spans over theextensive inter-tidal mudflats in DeepBay, several mitigation measureshave been implemented to protectthe ecological environment in DeepBay after extensive consultation withgreen groups:
'H�()�*+,-.Deep Bay Coastline - Inter-tidalMudflats Area
/0}Temporary Access Bridge
1234Closed Grab
�á5C½L£Installation of Cofferdamand Silt Curtain
67�89��Dredging at Mai Po
:;<=��»�67>áMai Po Gei Wais after Enhancement Works
¤?@A6Ecological Compensation Area
B�CDBlack-faced Spoonbill
��ÎÏEF�GHBirds Resting in the Vicinity ofthe Works Site
½L£Silt Curtain
• temporary access bridgeis constructed to minimise theimpacts on inter-tidal mudflats;
• provision of waterquality impact mitigationmeasures including installationof cofferdam, silt curtain andusing closed grab for dredging;
• dredging at Mai Poimproves the water exchangecapacity in Gei Wais and thusenhances the feeding groundfor birds; and
• provision of ecologicalcompensation area is alsocarried out.
Several awards in environmentalaspect have been awarded to theProject attr ibuted to theContractor's sincere cooperation.
While the existing 3 boundarycrossings are near saturation, HK-SWC serves as a measure ofalleviation, as well as to enhancetrade and economic developmentbetween Hong Kong and SouthernChina and strengthen the positionof Hong Kong as the hub of thePearl River Delta area.
���[��
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���T7�Road T7 in Ma On Shan
IJ�{½KLNoise Semi-enclosure
Road T7, which opened in August 2004, is a 3.2 km dual 2-lane carriageway linking Ma On Shan Road and SaiSha Road. It provides a direct route for traffic to bypass the busy town centre and shorten the travelling timebetween Shatin and Ma On Shan. The 63,000 square metres of noise barriers were the largestever to have been erected at a single project in Hong Kong. About 565,000 cubic metres of C&D materialswere generated in the project with a large proportion of them were reused as filling material for the project.2.3 kilometres of noise semi-enclosures and 1.7 kilometres of vertical and cantilevernoise barriers were erected to reduce traffic noise nuisance to
nearby residents. Two underpasses tohouse the slip roads connecting Road T7 wereadopted to minimise environmental impactscaused. A touch of vivid green livened upthe surroundings with trees plantedbeside the road, and slopes coveredin a blanket of shrubs and trees.
<¤�_vnoosZXrw�>?:lËqmn�n+qRq\{�$w_>}G¥¦ð_B]²_&<¤�_LM:l§Wߨ�ì¨+©G×�>eàQõg²³B¥¦ð+{�§uªN«_ä�ÛN�BBB�de�>?��9¬�:6|ì�¿�&¡y[\húDpD�oooc�P+&Ù��>óì�<®� �v¡y[\ìð?Ö�&«_¯5AÚNÉÜÙ�� �Ë��[GÚaÉÜÙ���Ëåã�Ë��>'ýý�×°±���ê�+��&Nl}G<¤�_+¶_�ú�Þß�ËTX>Ý'�õ+�V��ý�¿ý&����t����������t���[���J$��67&
;M��NOUnderpass Portal
PQK��F9Low Noise Road Surface
;M��Underpass
RS{½KTUCantilevered Noise Barrier
VW{½KTUVertical Noise Barrier
���[��
�8��f�=W
orld-class Infrastructure for Continuing Prosperity
���T7�Road T7 in Ma On Shan
�XAY��Z[��Q\]ô��
Landscaping Works atCheung Muk Tau Interchange
�Ï^_`abcsd��)` Formed Roadside SlopeNear Heng On Estatein Ma On Shan
csd�` Formed Slopes
��)ef�gARoadside Trees
hÏIJ�{½KL` ef�gA�i�jATrees/Shrubs Planted on SlopesAdjacent to Noise Semi-enclosure
Slopes across Hong Kong are being turned into visually pleasing elements of the cityscape by planting suitable vegetation.Our engineers build Hong Kong into a world-class city by making our slopes safe and green. Slopes are madegreen and safe by using environmentally-friendly solutions and creative ideas that blend well with the naturalsurroundings.
�![J$��Safe and Green Slopes��wVab÷t� !��)B.�"$À>²×5A*³´¾&[\l^_#$��ª©J$>µ��´Ù?Ú]Ûã�>¯����¶B�Ì·¾+´¸>ñ÷æçB¹ùÀ+ab%&'67( )s&
g�klmno�Ì÷p]ô� Íq�Champion of the "Best LandscapeChampion of the "Best Landscaped Slope" is located at Lung Td Slope" is located at Lung Tak Court, Stanleyg�klmno�Ì÷p]ô� Íq�Champion of the "Best Landscaped Slope" is located at Lung Tak Court, Stanley
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orld-class Infrastructure for Continuing Prosperity
ΩÄÏ�ÐÑÄÒÓÔÕEco-friendlyBuildings forBetter Living
rÅ�s´%���tQuality Building Award 2004Þº�:�No. 1 Peking Road
• qí×o�»�®<¼F\½ýEFg/Double skin ventilated façde and externalshading device to reduce solar gain
• ;¾5JEFòQ�\HèEFòUse of solar energy through photovoltaic panelsat the rooftop
�*+T³TX¡¿ó,,��ý-.�Q>·!���:ÞÑÒ+Ù«�V&
¢£+Ù!;?|òÀ�²�Þz@>Áv·Ü>·!�wèÂ+Ù«��ô>����Ä+a&[\l£?Ù«�+/ÕåTXå0¡L�|w[Ì�{�>ñÙ«���òÊg²èç>9§1 267:3&
Sustainable Building Constructionis defined as the creation and responsiblemanagement of a healthy built environmentbased on resource efficient andecological principles.
Engineers of our construction industry arestriving for this aim by being innovative, anddelivering buildings and structures that providegreater satisfaction and value to the users.They have developed tools and strategies forthe design, construction andoperation of buildings, which optimise theconsumption of materials & energy andminimise environmental loadings.
]uvwx.rÅ�sry%���tSustainable BuildingConstruction –Certificate of Merits2004¼Ú�ÅChater House
• ÆÇÈÉÊËÇÌÌfgý¦�[§uBÙ«i�HardiWall system reducesconstruction time andwaste
Q$z{wx.��|}~â0�sFQ\���÷��_�z{wxEnvironmental-friendlyResidential Building – 1st UrbanResidential Property Certificatedwith Top Level HK-BEAM RatingÍÎ!The Orchards
• MÍZ-ÏHfgBEFò?@ÐÑi��;��� ÒHarness natural resources byrainwater recycling systems and solarsystems and solar powered lighting
�ú�wx.rÅ�sry%���tEnergy-efficient Building – Certificateof Merits 2004áâ Óì¨âtTwo IFC
• qí�»½ýEFg/Double skin façade to reduce solar gain
]uv�sSustainable Building³�[\TÜ�<EMSD New Headquarters
• ÝiCÙ«�ÔÜRetrofit of disusedbuilding
• Z-HèfgGrey water recycling
• @�×oNatural ventilation
• ' úò�Renewable energy
• ��@�AÅfgð��}1B(Individual light-zones control via the useof motion sensor and computer system
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�8����=Eco-friendly Buildings for Better Living
ÑÒT³)67456¡:Þ@Õ*Öb+æ�Ù«�@×6|>&.LØ78å,-.B�*+23{T³)&ÙÚPÛ�Ù«��²ÞúÜÝt>Þß/ÕåTXå0¡B9}+¿�@Aðàá&©�ͧ?â>���JOA�BBBÞ6ãBaBlx;�ÅåxyåO�ì¨Bª�¬�ä�g��Ù«�VÙÚ¶�æ�Ù«�@×&
HK-BEAM is Hong Kong's voluntary green building labeling scheme to promotemore healthy, efficient and environmentally sustainable buildings.Premises are assessed to the highest standards across their whole life cycle ofplanning, design, construction, operation and management. Over52,000 homes and 70 office towers, shopping malls, community and mixed-use buildings have so far achieved the HK-BEAM green building label.
JKT³45Green Building Assessment
[\lå�ÑÒT³67456B:;Ø9<q=>�ýý�Ù«��´j+�VBj���&
[\l'"W|æ²ÞÙ«�+:;Ø>¿¬cdQt+Jëj�B�V���56bÙ!�>�BËç+()j�B�V���¯ðB&è�&
v²ÞÙ«úÜÝtì>;$Bñ�é'��²�• >?78?[y¡67�• �L��Z?�[T³)@U�M?�• �L%&Z��[»�'(�¤[• ��A0¡[¥�_B�CD§
����������Hong Kong Building EnvironmentalAssessment Method (HK-BEAM)
������ !"Life Cycle Costing
å�:;Ø45&.ýý�!"#$$��V3�¬ê^+Ëç��&×Wå�úÜÝtj�ië¶>[\l'�ì»Ù«�íÜ��õ+¶�j�&
©�î�Ù«��BÅ�Ìò�ï2+ð;fg>J¸ý¦úhÙ«���+±n��[V6��+ñ�&
Life Cycle Assessment is used to minimiseenvironmental harm that causes long-termeffects such as global warming, whilethrough Life Cycle Costing, engineers producean expenditure profile over a building's lift span.Appropriate selection of building materials andadoption of energy efficient systems can help to minimise"embodied energy" which measures the amount ofenergy needed to produce building materials and reduce recurrentenergy use.
Engineers have adopted HK-BEAM and Life Cycle Costing tominimise the adverse environmental and costing impacts of buildings.
Engineers look at the whole life cycle of buildings so that they canbalance initial costs and environmental impacts in the short term (design& construction) with ongoing costs and environmental impacts in the longterm (operational life & demolition).
4���� ¡¢£¤�Concept of Life Cycle Assessment and Costing
Across the whole life cycle of their buildings, the property owners andusers can:• enjoy a healthy living and working environment;• reduce energy, water and building material use;• cause less pollution to the air, water and land; and• save money in operation and maintenance.
Q\��²/Environmental +
Cost Impacts
¨���Embodied
Energy
Q\��²/Environmental +
Cost Impacts
¨���Embodied
Energy
Q\��²/Environmental +
Cost Impacts
¨���Embodied
EnergyQ\��²/
Environmental +Cost Impacts
Q\��²/Environmental +
Cost Impacts
¨���Embodied
Energy
�;��Recurrent Energy
in System, etc
�9J+Y�hRaw MaterialAcquisition
��¤�Y��Product Manufacture and Transportation
�SY��Construction
and Fitting Out �;C$ØOperation and Maintenance
��C7�Renovation and
Demolition
��:���EGrave (i.e. Death)
��:�¾¤ECradle (i.e. Birth)
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�*+E45Sustainability Assessment
]uv+�&�������&������ N]uv+��¡¢£¤2¥�¦�����»c§¨�©2ÃÄ�&�&©¯ª«���C�s�� �¬�fN�¢£SPeARTM (Sustainable Project Appraisal Routine) as a decision-support methodology to facilitate the incorporationof sustainability issues into a decision-making process.
T¥
Envir
onment ¦
§Societal
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Natural Resource
ª«
Economic
��� ���������
®��r¯¥°Evaluate Site Options
�� � �����������
®±]uvK��²Ò³³Evaluate Against Objectives
���� ���������
®���sF���Evaluate Building Designs
����� ���������������
®´:����]uvK�+�Monitor Progress TowardsSustainability
ð|ØÙ�ñòäQRyz§�¿ª��ð��*+E45&[\l×Wªy©N+'()*ÙÚ6|�ëòQR+'()*.�ÙÚ>eå�FGå01��67B��,�ó@ÙÚÙ«�v/ÕåTXB0¡·��+'()*&
Many factors are considered in assessing the sustainability of a building development. Schemes are in place to help engineersto evaluate the sustainability of housing developments. Social and economic indicators as well as environmental and naturalresources indicators are considered in design, construction and operation stages of the buildings.
��Environment
��Energy
�sF9Construction Material
¤F©µôBiodiversity
¶ô·�Cultural Heritage
��Water
8FWaste
¸¹QKOutdoor Noise
ºÙC»¼Landscape and Visual
½¨QKIndoor Noise
¸¹éuÅ¢Outdoor Air Quality
¾u¿Microclimate
é¨éuÅ¢Indoor Air Quality
ZÀ���rÁTransportationAlternatives
ÂÃ&ÄHealth Care Centre
EÅÆÇ��Leisure & RecreationalServices
ÈMÉʦCarpark Provision
zËQ\Living Condition
ÌÍ&ÄElderly Care Centre
¸ùÎÏEconomic Return
zËÐÑ�3Housing Affordability
¤�²/Life Cycle Costing
/�Ò�ÓÔLocal Employment
ÐÕZÀ��Public Transport System
ÐÕéÖOpen Space
×Ø&ÄChild Care Centre
�� !Natural Resource
"#Societal
$%Economic
�#$%&'()*��+,-./Indicators for Sustainable Housing Development
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�*+T³HIH/ÕSustainable Buildings – Design
001�2�34)Energy-efficient andEnvironmental-responsive Design
qíôõ�»�®C¼F\Jï ýýö/[��(<*-òïkDouble skin façade and external shadingdevice to reduce solar gain
Ù,���+,ÚÛü�EFòPhotovoltaic Cell SystemUtilisation of solar energy
Ü��¼F\.1uÝF1÷ø�ùúBLight Shelves / ShadingShading device configured to allow betterdaylight distribution into rooms
e?¹ÝÚÛ�ôõ�»ûí�uJ�o;×>ÌÍ�"1À�ýö/[+ïkActive Façade SystemUtilisation of clear glass to achieve maximumtransparency and solar control
ÞôËßòüæç'ý�r/B¼F�ïLandscape RoofVegetation for better natural evaporativeand solar insulation
àá�Ål�þfK�eý¦�Ý�]�+®»��OrientationBuilding is orientated to maximiseharbour view with minimal east andwest facing façades
Ëßàâü�!;ïk�²@�×oSky CourtUtilisation of stack effect tofacilitate air movement
Ü��CãÙäåæ�ïò¼F�C'�Ý�]�l�J+5�Horizontal Sunbreakers withInternal Preforated BlindMost effective shading device forwest / east facing façade whilemaintaining maximum view
Sustainable Building design can contributeto less demand on the earth's natural resources.Engineers bring the concepts of low energyconsumption and advanced technologiesinto building design. They design sustainablebuildings to meet the occupants' health andcomfort needs and reduce environmental impactby optimising the following environmental issues:• natural ventilation and
microclimate;• natural daylighting and visual
comfort;• solar control; and• energy efficient system.
JKT³/Õòý¦� 0@���+a&[\lÝ �J}K�LMNO�ù²Ù«56W\ì&º£+56.���ÄA¨ÑÒ��©a+9§>ý¦��V+��>�¡f+èç{�Þß�• P�ï�åQ&R�• P�²Ç%STU!E�• ��VWX��¤[• ��¾¿§
556��Indoor Environment
çèÀ)��é�À)�3Cross Ventilation Design Enhances Air Circulation
¦êÁÙé�»¼ëìíNatural Daylight Enhances Visual Comfort
57��Outdoor Environment
PzÀ)Oé�;p�ëìíLow Level Opening Enhances Pedestrian Wind Comfort
é&îä��ïðéuèÀMassing Opening to Enhance Wind Penetration
¬H®¯°A±'²³´µ¯Applications of Computational Fluid Dynamics in Airflow Simulation
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.àá�*+T³²×�§>Ù«�+�TXE?+�àá+�b>����[ØÙ��&
[ \ � Ð � � % �Ä>v[ ®Ù!�ÄB»���¶PñØÙW\*?��>*Ìïî&��{�J¸�LT³hUB÷yñY>á£TX Z>9§�L567�<=&
ñ��sòóôÊ����/0�õ�öYAB�ÖÂ÷øùúûNew construction technology minimise in-sitetemporary works and timber use and eliminatescaffolding
üýþlôÊçQ\��Off-site construction tubular columnreduces environmental impact
Buildability is an important element in the overall requirementsof sustainable building construction, enabling thebuilding to be constructed with ease.
Engineering methods such as pre-fabrication and offsiteconstruction of modules, walls and tubular columns, enableeasier and efficient construction. These strategies help toreduce construction waste, time taken to build,improve construction quality and minimise theimpact to the environment.
�*+T³HIHTXSustainable Buildings – Construction
��õ&�ëG�sModular Construction
üý�sëGPre-fabrication ofBuilding Module
��õ&�ëG�sModular Construction
�*+T³HIH0¡Sustainable Buildings – OperationÙ«�.¯ðì¾Ê�[+ò����>9§hú�[+ú8�>��Vhú=+��&[\l�÷L�:���õý¦����>Þß�
• ²?[�T³9}¾¿� ���Ù«Êòå¾��B�äfg�
• ²?P\op]^¾¿^_op>����ß_�IHè>¾á�������+�V����B
• T³_9¾¿À?�W��>��EFò�oò>BZ-ÏH �&
Operation of building consumes enormous energy andmaterial, and produces domestic waste which impacts theenvironment. Engineers have considered measures to reducesuch environmental impact, which include:
• adopting Intelligent Building Management tomonitor and supervise all building energy, fire and safetyservices;
• using Automatic Refuse Collection Systemto collect refuse by concealed pressurisation system,eliminating environmental impact to surroundingcommunal areas; and
• harnessing renewable energy such as solar andwind rainwater recycling by building integrated systems.
�89:Energy Management
;<:Waste Management
������Use of Renewable Energy
��wxç�Intelligent Building Management
8F¦eÎ�ÚÛAutomatic Refuse Collection System
�Û8F��Traditional Waste Management
���Ù��ÚÛPhotovoltaic (PV) System
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�8����=Eco-friendly Buildings for Better Living
`abcEy�deîEMSD Headquarters in Kowloon Bay
4=��+>?�@ABCDBuilding IntegratedPhotovoltaic System
³�[\T+Ü�<¡�*+T³23B>?�W,�+�C&x�<»7JÙ«���A?VW���â�<¯^p���ð©�ôû!ûÙ¬j&
�í�+��¡��fghij[ãk>ev;¾5C���Çl�¾¿>�B(Bñ�F1?ø&��¡��ÜfgÝ'�V6W?m¶n��¾¿>�Å®»ª?êç,56>�LM<!�;+P�ï��V�[y+�í&¹®>��¡��W��0¡&
The new headquarters of the Electrical and Mechanical ServicesDepartment is an example of sustainable buildingdevelopment and use of renewable resources. It wasconverted from an existing facility - the Hong Kong Air CargoTerminal II Building in Kowloon Bay. Suitable modifications weremade to the structure.
The seven-storey building uses infra-red reduction glass andoverhang, as well as photovoltaic system on the roof tocontrol and use the sun's rays. New technology was deployed torecycle grey water for flushing, while existing façadeopenings in the building were used for natural ventilation tothe workshop floors. Moreover, renewable energy is used forthe operation of the building.
��m�â0w�é��-Ex-HACT II Building
mÉ·¯City Remains
��m�â0w�é��-¨Ex-HACT II Building - Inside View
��ÁÙ�çSunpipes
¦êÀ)Q\��É�wzNatural Cross Ventilation to Workshop Floors
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nooqZv��¤!�Q+��ñ��+Ü���äBÑÒú8�V++�*&
[\l56Jï+��¥�op578�qr>�Ù«�+'()*¡��+�+>¬¾á�.Ó³B��[ðBú8�V+ä/¡9j+�&
The SARS epidemic at Amoy Gardens in2003 underlines the importance of ahealthy living environment.
Engineers devise effective measuresto safeguard the health andhygiene requirements,which are important to thesustainability of buildings. Itis also important to ensurethat the potential hazardis removed and theworking and livingcondition is safe.
EEFGHIJKLM NOPQRSTUVWX YZ[\Ventilation Study of SARS Isolation Wards
$½�óMock-up Test Chamber
CD4)System Design
56X ]^Indoor Air Quality
78stHealthy Building
,���è·e3õ $Computational Fluid Dynamics Study
��PQ���������p�Water Treatment for Cooling Towerto Prevent Legionnaires' Disease
�¤���ÚÛ��Healthy Drainage Design
���$½¨éuÅ¢Design and Monitoring of
Indoor Air Quality
�����©�������ë²�� !�"#$%#�&'()*+(,©�Â-��òó./�0�ú�12¦3�4©�5�¥{��¦Â�678K9:�;iO<ó=�½>?��ñ�À)ÚÛ£In 2003, a team of professional engineers, the SARS-Busters, produced virtualdesign of new air-conditioning system, employed in a SARS isolation ward,as an initiative to contribute their expertise for an effective contingencymeasure.
Ö×Acknowledgements¥��=³´LM��>ñ���ò ���>!¹"½&We would like to acknowledge the support and contribution of the following organisations in providing valuable input for the booklet.
#N�$%�&)'NIn alphabetical order
�:@���TAgriculture, Fisheries and Conservation Department
Ù«TArchitectural Services Department
òäTBuildings Department
QR[\SRTCivil Engineering and Development Department
Central Waterfront Property Project Co Ltd
®TDrainage Services Department
³�[\TElectrical and Mechanical Services Department
�V��TEnvironmental Protection Department
ÓÙ«J~��Gammon Construction Ltd
(1è�Glorious Sun Holdings Ltd
_)THighways Department
�ØÙ«J~��Hip Hing Construction Ltd
��C è�J~��Hongkong Land Ltd
4òTHousing Department
*+ô[\,-Ove Arup & Partners Hong Kong Ltd
./=٫lJ~��Rocco Design Ltd
����٫mPThe HK-BEAM Society
���}J~��The Hongkong Electric Co Ltd
���m³0[\fThe University of Hong Kong – Department of Mechanical Engineering
Ö×Acknowledgements¥��=³´¶(B·¸>ñ���ò ���>!¹"½&We would like to thank the following organisations for their sponsorship and enthusiasm towards theproduction of the booklet.
#N�$%�&)'NIn alphabetical order
ìí�_J~��CLP Power Hong Kong Ltd
1�³IJardine Engineering Corporation
23٫�\[�J~��Leighton Contractors (Asia) Ltd
���[�mÙ5B )m4The Hong Kong Polytechnic University - Faculty of Constructionand Land Use
���[�m[\m4The Hong Kong Polytechnic University - Faculty of Engineering
���m[\m4The University of Hong Kong - Faculty of Engineering
ABB (Hong Kong) Ltd
5! 6,-J~��Atkins China Ltd
�7٫J~��Barbican Construction Co Ltd
8¥9�����J~��BMW Concessionaries (HK) Ltd
12[\J~��Excel Engineering Co Ltd
��Ò;:;m4<=>iDIVE (Haking Wong)
*+ô[\,-Ove Arup & Partners Hong Kong Ltd
Ü?��J~��Shinryo (Hong Kong) Ltd
��ì%�m[\m4The Chinese University of Hong Kong - Faculty of Engineering
��ìí !J~��The Hong Kong and China Gas Co Ltd
���[�m٫B4 hmfThe Hong Kong Polytechnic University - Department of Building& Real Estate
���[�m�C6ìmfThe Hong Kong Polytechnic University - Department of Computing
���[�mQ F[B ��@mfThe Hong Kong Polytechnic University - Department of LandSurveying and Geo-Informatics
A¯B[\,-J~��W T Chan & Associates Ltd
���J~��WSP Hong Kong Ltd
������
���������� �����������������
�������DEPARTMENT OF BUILDING & REAL ESTATE
SHINRYO (HONG KONG) LIMITED�������
������
���������� �����������������
����� ���DEPARTMENT OF LAND SURVEYING & GEO-INFORMATICS
â0´õ��õ@Faculty of Engineering
The University of Hong KongAYm�
Jardine Engineering Corporation
������
���������� �����������������
����FACULTY OF ENGINEERING
������
���������� �����������������
�������FACULTY OF CONSTRUCTION AND LAND USE
BC�s:"ðE�DÐELeighton Contractors (Asia) Ltd
��������1� ��9��9/F Island Beverley, No 1 Great George Street, Causeway Bay, Hong Kong
�� Tel +852 2895 4446 �� Fax +852 2577 [email protected]
www.hkie.org.hk
ISBN-13: 978-962-76192-4-6ISBN-10: 962-76192-4-8
����������� !"#$%&The booklet is printed with soy ink on recycled paper.
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