Building Services Installation for a Green Building v1

1 Ir WONG Chi Hung Electrical and Mechanical Services Department , Energy Efficiency OfficeBuilding Services Installation for a Green Building08 December Consumption in Hong Kong (Period : 1991 2010) Consumption in Hong Kong Energy Services Installation Lighting Installation Air-conditioning Installation Electrical Installation Lift & Escalator UsContentsEnergy Consumption in Hong Kong43%21%66%Increase percentage (max.)38%236,270 91,140 The smallest value54%286,910 150,859 The highest value54%276,950 150,859 201053%283,540 149,366 200952%285,430 147,345 200851%286,910 147,072 200752%281,880 145,204 200651%281,179 144,171 2005 40%249,616 99,810 199338%246,562 94,152 199239%236,270 91,140 1991 Electricity Vs Energy percentageTotal energy consumption(TJ)Electricity consumption (TJ)YearEngery Consumption in Hong Kong (TJ)50,000100,000150,000200,000250,00030 0,0001991 1993 1995 1997 1999 2001 2003 2005 2007 2009 YearTerajoules (TJ)0%10%20%30%40%50%60%Percentage (%)Total energy consumptionElectricity consumption (TJ)Electricity Vs Energy percentagePeriod : 1991 2010 Note.

2 1 kWh Electricity Consumption in Hong Kong Total electricity consumption in HK Billion kWh about90%electricity consumed in buildings Electricity consumed in buildingscontribute about60%HK Greenhouse gases emissionSource from Hong Kong energy end-use data (EMSD)Note : 1 kWh In Year 2010 Electricity Consumption in Hong Kong29%13%6%6%4%4%5%2%31%Space ConditioningLightingRefrigerationIndustr ial Process/EquipmentOffice EquipmentCookingHot waterRailOthersHong Kong Energy End-Use Data (Year 2010)EMSD developed a comprehensive set of 5 BECs since 1998 Building Energy Codes code of Practice for Energy Efficiency of Air Conditioning Installation Lighting Installation Electrical Installation Lifts & Escalators Installation PrescriptivePrescriptiveapproach on MINIMUM Energy Performance Standards, Simple & Easy to followNote.

3 EMSD s Building Energy Codes documents are available for download developed a comprehensive set of 5 BECs since 1998 Building Energy Codes Performance-based Building Energy code PerformancePerformanceapproach requiring Total Building Energy computationBuilding Energy Codes Participation rate of the private sector in the HKEERSB has been low only 31% of the registered buildings being non-government buildings Mandatory Implementation of Building Energy Codes under Building Energy Efficiency Ordinance (BEEO) commenced on 21/09/2012 Building Services Installationfor a Green BuildingBuilding Services Installation Lighting Installation Air-conditioning Installation Electrical Installation Lift & Escalator Installation [Comply with the Performance Based Building Energy code (2007 edition) issued by the EMSD]Lighting InstallationInstall lighting with energy efficient lamp ( compact fluorescent lamp or LED) instead of incandescent light bulb-electricity saving : 70% to 80%-longer service life : 6,000 to 8,000 hours (average for CFL)-increase luminous efficacy-electricity saving.

4 30% to 40%Lighting InstallationInstall T5 lighting instead of T8 lightingLighting Kowloon Bay Sport centreInstall T5 lightings instead of high intensity discharge lamp for high bay lightings-increase luminous efficacy : ~ 60%-electricity saving : 30~40%BeforeAfterInstall lighting with more efficient type such as reflective fixture type instead of diffuser typewith Reflective fixturewith Diffuser-increase light intensity : 30%-reduce number of required light fittings-electricity saving : 30% to 40%Lighting InstallationInstall LED type lighting instead of Incandescent lamp and spot lightingLighting Installation -flexible and colourful in design-longer service life : approx. 50,000 hours-electricity saving : more than 70%Lighting Installation - electricity saving 70%Install LED type Exit lighting instead of traditional fluorescent type Exit lighting18/F19/FIndoor temperature : 24 COutdoor temperature : 32 CReturn Air Extract Indoor cool air outSupply Air Draw outdoor fresh air in17 InstallationSupply Air and Return Air of an central air-conditioning systemExhaust airFresh airThermal WheelFan coil Return AirSupplyAirInstall heat reclaim device (Thermal Wheel) Reduce the cooling request Electricity saving.

5 30% Air-Conditioning InstallationAir-Conditioning InstallationHeat reclaim deviceAir cooled A/C System Water cooled A/C systemFresh Water Cooling Tower SchemeAir-Conditioning InstallationInstall water-cooled instead of air-cooled A/C system- consume 20% - 30% less electricityAir-Conditioning InstallationInstall Variable Speed Drive (VSD) control instead of constant speed control- Electricity saving by 20%Air-Conditioning InstallationLeast energy is used by one chiller operating at 90% capacity as compared with that used by two chillers each operating at 45% smaller size machines for light load operate more efficiency when they are loaded closely to their full rating than they are only lightly LabelEnergy Label-Choose energy efficient air conditioners.

6 -Air conditioners with Grade 1 energy label are most energy InstallationConditioning InstallationAir-conditioning Installation 73% visible light transmitted73% visible light transmitted 94% infrared rejected94% infrared rejected 99% ultraviolet ray rejected99% ultraviolet ray rejectedInstall solar control window film-electricity saving : up to 30%Install occupancy sensor control to turn off the lighting and air-conditioning system when there is nobody around- Electricity saving up to 20%Electrical InstallationUltra-soundInfra-red12 Infra-red sensor Less power long service life High response rate Better use in a short distance rangeUltra-sound sensor : Accurate detection within range Less affected by external surroundingUnstable in detection?

7 Unstable in detection?Low response rate?Low response rate?Occupancy SensorsElectrical Installation - Electricity saving : 10 ~15%Install lighting system control, such as individual or zone control switch/light sensor, to turn off the lightings by the window (manually or automatically) at bright sunshiny daysElectrical InstallationInstall Energy Saving Unit for the lighting controlElectrical Installation - Electricity saving : up to 40%Vertical and Horizontal Axis Vertical and Horizontal Axis Wind TurbinesWind TurbinesInstall small wind turbine (Renewable Energy System)Electrical Installation - A sustainable energy resourceVertical axisHorizontal axisCondition to be required : Sufficient wind speed on R/F of Building to operate a wind turbine in most of the day To be installed at R/F of buildingPVPVP anelsPanelsInstall PhotoVoltaics (PV) Panels (Renewable Energy Installations)Electrical InstallationConvert solar radiation into electricity using semiconductors that exhibit the photovoltaic effectA sustainable energy resourceSolar Water Heating UnitSolar Water Heating UnitElectrical InstallationSolar water heating system (Renewable Energy Installations)- Heat water using solar energy - A sustainable energy resourceInstall lift with following features a)with light-weighted decorationsb)with variable voltage variable frequency (VVVF) drivec)

8 With facilities auto off at idling conditiond)under Building Management System ControlLift & Escalator Installation - Electricity saving : up to 30%Note : Saving depends on usage patternLift & Escalator InstallationLift & Escalator Installation Around 10 to 40% energy saving for lift motor depending on lift traffic patternInstall electricity regeneration device which will have electricity generated during the lift going down with heavy loads & up with light loadsNotes : 1. Saving depends on usage pattern2. Check with the lift manufacturers on availability and requirements for such technologyEscalatorTST Middle Road MTR passageTime SquareCentral MarketLift & Escalator InstallationLift & Escalator InstallationLift & Escalator InstallationInstall variable voltage variable frequency (VVVF) drive system- Electricity saving : 14% to 50%Note : Saving depends on usage patternLift & Escalator InstallationLift & Escalator InstallationInstall Service-on-Demand Escalator with on-off or 2-speed controlsUsing optical sensors to start and stop.

9 Or to change speed control on the escalatorsSaving in motor power depends very much on usage pattern-Electricity saving : 10 to 15%Notes : Escalator COP safety requirements shall be ensure adequate distance for safety provisionsEnergyland - How You can Help Sustainable Technology Net WebsitesEMSD Hotlines : 2808 3465 EMSD Contact UsThank You !Energy Saving Begin with Us