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Ir WONG Chi Hung Electrical and Mechanical Services Department ,
Energy Efficiency Office
Building Services Installation for a Green Building
08 December 2012
1. Energy Consumption in Hong Kong (Period : 1991 – 2010)
2. Electricity Consumption in Hong Kong 3. Building Energy Codes4. Building Services Installation
Lighting Installation Air-conditioning Installation Electrical Installation Lift & Escalator Installation
5. Related Websites6. Contact Us
Contents
Energy Consumption in Hong Kong
43%21%66%Increase
percentage (max.)
38%236,270 91,140 The smallest value
54%286,910 150,859 The highest value
54%276,950 150,859 2010
53%283,540 149,366 2009
52%285,430 147,345 2008
51%286,910 147,072 2007
52%281,880 145,204 2006
51%281,179 144,171 2005
⁞⁞⁞⁞
⁞⁞⁞⁞
⁞⁞⁞⁞
40%249,616 99,810 1993
38%246,562 94,152 1992
39%236,270 91,140 1991
Electricity Vs Energy
percentage
Total energy consumption
(TJ)
Electricity consumption
(TJ)
Year
Engery Consumption in Hong Kong (TJ)
50,000
100,000
150,000
200,000
250,000
300,000
1991 1993 1995 1997 1999 2001 2003 2005 2007 2009
YearT
eraj
ou
les
(TJ)
0%
10%
20%
30%
40%
50%
60%
Per
cen
tag
e (%
)
Total energy consumption Electricity consumption (TJ) Electricity Vs Energy percentage
Period : 1991 – 2010
Note : 1 kWh ≈ 3.6MJ
Electricity Consumption in Hong Kong
Total electricity consumption in HK 41.9 Billion kWh about 90% electricity consumed in buildings
Electricity consumed in buildingscontribute about 60% HK Greenhouse gases emission
Source from:Hong Kong energy end-use data (EMSD)
Note : 1 kWh ≈ 3.6MJ
In Year 2010
Electricity Consumption in Hong Kong
29%
13%
6%6%4%4%5%
2%
31%
Space Conditioning Lighting RefrigerationIndustrial Process/Equipment Office Equipment CookingHot water Rail Others
Hong 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
PrescriptivePrescriptive approach on MINIMUM Energy Performance Standards, Simple & Easy to follow
Note : EMSD’s Building Energy Codes documents are available for download athttp://www.emsd.gov.hk/emsd/eng/pee/eersb.shtml
EMSD developed a comprehensive set of 5 BECs since 1998
Building Energy Codes
Performance-based Building Energy Code
•• PerformancePerformance approach requiring Total Building Energy computation
Building 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 Building
Building 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 Installation
Install lighting with energy efficient lamp (e.g. 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 : ~ 30% to 40%
Lighting InstallationInstall T5 lighting instead of T8 lighting
Lighting Installation
e.g. Kowloon Bay Sport centre
Install T5 lightings instead of high intensity discharge lamp for high bay lightings- increase luminous efficacy : ~ 60%- electricity saving : 30~40%
Before After
Install lighting with more efficient type such as reflective fixture type instead of diffuser type
with Reflective fixturewith Diffuser
- increase light intensity : ~ 30%- reduce number of required light fittings- electricity saving : ~ 30% to 40%
Lighting Installation
Install LED type lighting instead of Incandescent lamp and spot lighting
Lighting 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’ lighting
18/F
19/F
Indoor temperature : 24ºCOutdoor temperature : 32ºC
Return Air – Extract Indoor cool air out
Supply Air – Draw outdoor fresh air in
17/F
…
…
Air-Conditioning InstallationSupply Air and Return Air of an central air-conditioning system
Exhaust air
Fresh air
Thermal Wheel
Fan coil
Return Air
SupplyAir
Install heat reclaim device (Thermal Wheel)
– Reduce the cooling request– Electricity saving : ~ 30%。
Air-Conditioning Installation
Air-Conditioning Installation
Heat reclaim device
Air cooled A/C System Water cooled A/C system
Fresh Water Cooling Tower SchemeAir-Conditioning InstallationInstall water-cooled instead of air-cooled A/C system- consume 20% - 30% less electricity
Air-Conditioning Installation
Install Variable Speed Drive (VSD) control instead of constant speed control
- Electricity saving by 20%
Air-Conditioning Installation
Least energy is used by one chiller operating at 90% capacity as compared with that used by two chillers each operating at 45% capacity.
Install smaller size machines for light load situation.
Chillers operate more efficiency when they are loaded closely to their full rating than they are only lightly loaded.
Energy LabelEnergy Label
- Choose energy efficient air conditioners.
- Air conditioners with “Grade 1”energy label are most energy efficient.
AirAir--Conditioning InstallationConditioning Installation
Air-conditioning Installation
•• 73% visible light transmitted73% visible light transmitted•• 94% infrared rejected94% infrared rejected•• 99% ultraviolet ray rejected99% ultraviolet ray rejected
Install 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 Installation
Ultra-soundInfra-red
1 2
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 surrounding
Unstable in detection?Unstable in detection?
Low response
rate?
Low response
rate?
Occupancy Sensors
Electrical 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 days
Electrical Installation
Install Energy Saving Unit for the lighting control
Electrical Installation
- Electricity saving : up to 40%
Vertical and Horizontal Axis Vertical and Horizontal Axis Wind TurbinesWind Turbines
Install small wind turbine (Renewable Energy System)
Electrical Installation
- A sustainable energy resource
Vertical axis Horizontal axis
Condition 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 building
PVPV PanelsPanels
Install PhotoVoltaics (PV) Panels (Renewable Energy Installations)
Electrical Installation
Convert solar radiation into electricity using semiconductors that exhibit the photovoltaic effect
A sustainable energy resource
Solar Water Heating UnitSolar Water Heating Unit
Electrical InstallationSolar water heating system –(Renewable Energy Installations)
- Heat water using solar energy - A sustainable energy resource
Install lift with following features –a) with light-weighted decorationsb) with variable voltage variable
frequency (VVVF) drivec) with facilities auto off at idling
conditiond) under Building Management System
Control
Lift & Escalator Installation
- Electricity saving : up to 30% Note : Saving depends on usage pattern
Lift & Escalator InstallationLift & Escalator Installation
– Around 10 to 40% energy saving for lift motor depending on lift traffic pattern
Install electricity regeneration device which will have electricity generated during the lift going down with heavy loads & up with light loads
Notes : 1. Saving depends on usage pattern2. Check with the lift manufacturers on availability
and requirements for such technology
Escalator
TST Middle Road MTR passage
Time Square Central Market
Lift & Escalator Installation
Lift & Escalator InstallationLift & Escalator Installation
Install variable voltage variable frequency (VVVF) drive system
- Electricity saving : ~14% to 50%
Note : Saving depends on usage pattern
Lift & Escalator InstallationLift & Escalator Installation
Install Service-on-Demand Escalator with on-off or 2-speed controls
Using optical sensors to start and stop; or to change speed control on the escalators
Saving in motor power depends very much on usage pattern
- Electricity saving : ~ 10 to 15%Notes : Escalator COP safety requirements shall
be compliedi.e. ensure adequate distance for safety provisions
Energyland能源資訊園地http://www.energyland.emsd.gov.hk
EPD -“How You can Help”環境保護署–同心協力改善環境http://epd.gov.hk/epd/tc_chi/how_help/tips_savearth/save_energy.html
HK Sustainable Technology Net香港可持續科技網http://sustech.emsd.gov.hk
Related Websites
EMSD Hotlines : 2808 3465
EMSD Web-sitewww.emsd.gov.hk or
www.energyland.emsd.gov.hk
Contact Us
Thank You !
Energy Saving Begin with Us