Building Services Installation for a Green Building...

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


Performance-based Building Energy Code

•• PerformancePerformance approach requiring Total Building Energy computation


• 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


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%


Install LED type lighting instead of Incandescent lamp and spot lighting


- flexible and colourful in design- longer service life : approx. 50,000 hours- electricity saving : more than 70%


- 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


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


Install Variable Speed Drive (VSD) control instead of constant speed control

- Electricity saving by 20%


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


- 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


Install Energy Saving Unit for the lighting control


- Electricity saving : up to 40%

Vertical and Horizontal Axis Vertical and Horizontal Axis Wind TurbinesWind Turbines

Install small wind turbine (Renewable Energy System)


- 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)


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


Install variable voltage variable frequency (VVVF) drive system

- Electricity saving : ～14% to 50%

Note : Saving depends on usage pattern


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

Building Services Installation for a Green Building...

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