Building Energy Code (BEC) and Energy Audit Code (EAC) (2012 Edition) for Buildings Energy Efficiency Ordinance (Chapter 610)

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1 Building Energy Code (BEC) and Energy Audit Code (EAC) (2012 Edition) for Buildings Energy Efficiency Ordinance (Chapter 610) 1

Allowable Lighting Power Density Lighting

Efficiency Power Distribution Loss Power

Installation Coeff of Performance System

Insulation Energy Efficient Control Design

2 Overview of BEC Key Energy Efficiency Requirements Lighting Installation Max Allowable Lighting Power Density Lighting Control Electrical Installation Motor Efficiency Power Distribution Loss Power Quality Energy Metering Air-conditioning Installation Coeff of Performance System Fan Power Piping Frictional Loss Thermal Insulation Energy Efficient Control Design conditions Energy Metering Lift and escalator installation Electrical Power Power Quality Energy Metering Lift Decoration Load Lift ventilation 2

lighting Not of fixed type, connected via flexible cable with plug

3 BEC Lighting Installations Not regarded as installations to which the BEEO applies Exterior to a building façade lighting, outdoor lighting Not of fixed type, connected via flexible cable with plug Integral to equipment or instrumentation (separate switch) Signage 3

4 BEC Lighting Installations Max Allowable Lighting Power Density (W/m 2 ) Space with fixed lighting installation at or exceeding 100W LPD = Total wattage of fixed lighting installation Internal floor area of that space Type of Space LPD (W/m 2 ) 4 Entrance Lobby 15 Workshop 14 Public Circulation Area 15 Lift Lobby 12 Corridor 10 Car Park 6 Toilet / Washroom / Shower Room 13 Office 15 Conference / Seminar Room 16 Staircase 8 Plant Room / Machine Room / Switch Room 12

5 BEC Lighting Installations Lighting control Lighting to which the BEEO is applicable and lighting to which the BEEO is not applicable : separate switch Min No. of Lighting Control Points for Office Space Space Area A (m 2 ) N (N : integer) 15 x (N -1) < A 15 x N 0 < N x (N-6) < A 30 x (N 5) 10 < N x (N -12) < A 50 x (N-11) N > 20 Area (m 2 ) > 0-15 > > > > > > > > > N

6 BEC Air-conditioning Installations Not regarded as installations to which the BEEO applies Equipment on high voltage (e.g. chiller) 6

7 Full Load 7 BEC Air-conditioning Installations Part Load Air distribution system fan for conditioned space CAV 1.6 W / L/s (supply system air flow); VAV 2.1 W / L/s (supply system air Sum of fan motor power of supply air fan & return air fan (excluding fan power for fresh air only or for exhaust only) Exception : System power < 5 kw; Fan motor power < 1 kw (e.g. FCU) VAV fan (supply or return) with motor output power 5 kw at 50% design flow, motor demands 55% input power Air distribution ductwork leakage limit Ductwork designed for > 750 Pa : min 25% leak-tested (DW143) and meet corresponding leakage limits

8 BEC Air-conditioning Installations Variable speed pump with motor output power 5 kw At 50% flow, motor demands 55% input power Piping system frictional loss Piping Φ > 50 mm : frictional loss 400 Pa/m & flow velocity 3 m/s Piping Φ 50 mm : flow velocity 1.2 m/s 8

BEC Air-conditioning Installations Min Coefficient of Performance (COP) of Chiller Air-cooled Compressor Scroll Screw Centrifugal Capacity Range (kw) All Ratings Min COP 2.7 2.9 2.

9 BEC Air-conditioning Installations Min Coefficient of Performance (COP) of Chiller Air-cooled Compressor Scroll Screw Centrifugal Capacity Range (kw) All Ratings Min COP Water-cooled Compressor Scroll Screw Centrifugal Capacity Range (kw) Below 500 kw kw Above 1000 kw Below 500 kw kw Above 1000 kw Below 500 kw kw Min COP Above 1000 kw 9

10 BEC Air-conditioning Installations Min COP of Unitary Air-conditioner Type of Cooling Air-cooled Watercooled Capacity range (kw) 7.5 kw & below, of types outside the scope of Energy Efficiency (Labelling of Products) Ordinance Above 7.5 kw & below 40 kw kw Above 200 kw All Ratings Min COP 2.4 for split type 2.1 for non-split type for VRF 2.9 for VRF 3 Unitary air-conditioner of type under scope of Energy Efficiency (Labelling of Products) Ordinance (Cap. 598) Fulfilling Energy Efficiency Grade 2 or Grade 1 10

11 BEC Air-conditioning Installations Thermal insulation Min Thickness for Chilled Water Pipework Ambient Outdoor Unconditioned Space Thermal conductivity (W/m- o C) Surface coefficient h (W/m 2-0 C) Pipe outer diameter d o Conditioned Space any value Insulation thickness (mm) 21.3 mm mm mm mm mm mm mm mm mm mm

12 BEC Air-conditioning Installations Thermal Insulation Min Thickness for Ductwork & Refrigerant Pipe Thermal conductivity (W/m- o C) Surface coefficient h (W/m 2-0 C) Ambient Outdoor Unconditioned Space Temperature difference between air inside duct/casing and surrounding Conditioned Space any value Ductwork & Casing Insulation thickness (mm) 15 0 C C Pipe outer diameter d 0 (mm) Refrigerant Pipework Insulation thickness (mm) * 15 mm mm mm * for line temp at 0 0 C

13 BEC Air-conditioning Installations System Control Off-hours control during periods of non-use Each system to have auto control to reduce energy through control setback or equipment shutdown Exception : system 10 kw cooling/heating capacity may be controlled by readily accessible manual off-hour control Each zone controlled by separate temperature control Zone normally not on separate floors Each air-conditioned system provided with automatic temperature control 13 Design conditions Outdoor and Indoor, for Load Calculation

BEC Air-conditioning Installations Energy Metering

cooling/heating capacity Continuous monitoring facilities

cooling/heating power (kw) & energy (kwh) COP

14 BEC Air-conditioning Installations Energy Metering Chiller, heat pump or unitary air-conditioner 350 kw cooling/heating capacity Continuous monitoring facilities to measure input of power (kw) & energy (kwh) output of cooling/heating power (kw) & energy (kwh) COP Chilled/heated water plant 350 kw cooling/heating capacity Continuous monitoring facilities to measure input of power (kw) & energy (kwh) output of cooling/heating power (kw) & energy (kwh) COP 14

15 BEC Electrical Installations Not regarded as installations to which the BEEO applies - Operating on high voltage or extra low voltage Owned by electricity supplier & installed in consumer substation 15

16 16 BEC Electrical Installations Power Distribution Loss Max Allowable Circuit Copper Loss Circuit type Connection Copper Main circuit Feeder Sub-main circuit 100m in non-residential building Sub-main circuit > 100 m in non-residential building Sub-main circuit in residential building Final circuit > 32 A Distribution transformer to LV Sw/Bd LV Sw/Bd direct to equipment LV Sw/Bd to local DB Local DB to equipment / outlet points 0.5 % (unless Tx Rm & Main Sw Rm directly beside, above or below each other) Neutral conductor rating phase conductor rating 2.5 % 1.5 % 2.5 % [subject to sum of losses in sub-main and final circuits (> 32A) 2.5%] 2.5 % 1 copper loss of total active power (1 or 3-phase) at designed circuit current

BEC Electrical Installations Min Allowable Motor Efficiency 17 Nominal Full-Load (Single-Speed Three-phase Totally Enclosed) Motor Rated Output (P) Min Rated Efficiency (%) 2-pole 4-pole 0.

17 BEC Electrical Installations Min Allowable Motor Efficiency 17 Nominal Full-Load (Single-Speed Three-phase Totally Enclosed) Motor Rated Output (P) Min Rated Efficiency (%) 2-pole 4-pole 0.75 kw P < 1.1 kw 77.4% 79.6% 1.1 kw P < 1.5 kw 79.6% 81.4% 1.5 kw P < 2.2 kw 81.3% 82.8% 2.2 kw P < 3 kw 83.2% 84.3% 3 kw P < 4 kw 84.6% 85.5% 4 kw P < 5.5 kw 85.8% 86.6% 5.5 kw P < 7.5 kw 87% 87.7% 7.5 kw P < 11 kw 88.1% 88.7% 11 kw P < 15 kw 89.4% 89.8% 15 kw P < 18.5 kw 90.3% 90.6% 18.5 kw P < 22 kw 90.9% 91.2% 22 kw P < 30 kw 91.3% 91.6% 30 kw P < 37 kw 92% 92.3% 37 kw P < 45 kw 92.5% 92.7% : : : P 200 kw 95 % 95.1 %

BEC Electrical Installations Motor sizing for motor > 5 kw output power rating Ratio of motor output power to anticipated system load 125% (unless

18 BEC Electrical Installations Motor sizing for motor > 5 kw output power rating Ratio of motor output power to anticipated system load 125% (unless requiring a special high starting torque) Balancing of Single-phase Loads 3-phase 4-wire circuits 400A, having 1-phase loads max unbalanced single-phase loads 10% 18

19 BEC Electrical Installations Min Allowable Total Power Factor (TPF) Circuit design TPF (at design circuit current) 0.85 for circuit 400A, or 3-phase circuit connecting to meter of electricity supplier Max Allowable Total Harmonic Distortion (THD) Harmonic current for circuit 400A, or 3-phase circuit connecting to meter of electricity supplier Designed Circuit Current (I, in A) THD in % of Fundamental Current I 40A 20.0 % 40A I 400A 15.0 % 400A I 800A 12.0 % 800A I 2000A 8.0 % I 2000A 5.0 % 19

BEC Electrical Installations In fulfilling above TPF or THD requirement, a correction device or a connection point for the device should be incorporated at the source motor control centre or local

400A measuring voltage (phase-to-phase & phase-to-neutral), current (phases & neutral), energy consumption, max demand, TPF, THD Feeder & Sub-main circuit Circuit exceeding 200A & below 400A

20 BEC Electrical Installations In fulfilling above TPF or THD requirement, a correction device or a connection point for the device should be incorporated at the source motor control centre or local distribution board in case a connection point, it should constitute a spare way solely for supplying power to the connection device 20 Metering & Monitoring Facilities Main circuit at or above 400A measuring voltage (phase-to-phase & phase-to-neutral), current (phases & neutral), energy consumption, max demand, TPF, THD Feeder & Sub-main circuit Circuit exceeding 200A & below 400A measuring current (phases & neutral), energy consumption Circuit at or above 400A measuring voltage (phase-to-phase & phase-to-neutral), current (phases & neutral), energy consumption, max demand, TPF, THD

BEC Lift & Escalator Installations 21 Not

loaded freight lift Lift in a performance

21 BEC Lift & Escalator Installations 21 Not regarded as installations to which the BEEO applies Mechanized vehicle parking system Service lift, stairlift Industrial truck loaded freight lift Lift in a performance stage Powered lifting platform Non-traction / Non-hydraulic driven

BEC Lift & Escalator Installations Max Allowable Electrical Power running active electrical power Traction drive lift Power of motor drive, at rated load rated speed

22 BEC Lift & Escalator Installations Max Allowable Electrical Power running active electrical power Traction drive lift Power of motor drive, at rated load rated speed upward Hydraulic lift Power of hydraulic oil pump motor, at rated load rated speed upward Escalator / Passenger conveyor - Power of steps driving motor, no-load at rated speed 22

23 BEC Lift & Escalator Installations Rated Load L (kg) Max Allowable Electrical Power of Traction Drive Lift (kw) Rated Speed Vc (m/s) 1.5 Vc < 2 2 Vc < Vc < 3 3 Vc < Vc < 4 L < L < L < L < L < L < Max Allowable Electrical Power of Escalator (W) Non- Public Service Escalator, at Rated Speed Vr (m/s) No Load Nominal Width 800 mm 1000 mm R < R < R < R < R 8 230R R R R R R

24 BEC Lift & Escalator Installations Max Allowable Lift Decoration Load Max Lift Decoration Load Lift Rated Load L (kg) L < 1800 L 1800 Allowable Decoration Load D (kg) D = 0.5 x L, or 600 whichever is smaller D = 0.38 x L x L 2, or 1250 whichever is smaller Lift Parking Mode Lift bank : at least 1 lift to run at parking mode (during low traffic) and not respond to passenger call until return to normal operation mode 24

25 BEC Lift & Escalator Installations Lift Ventilation and Air-conditioning Ventilation Lift car after idling for 2 minutes : ventilation to be shut off automatically, until lift activated again by passenger call If air-conditioned Lift after idling for 10 minutes : air-conditioning to be shut off automatically until lift activated again by passenger call, and resume operation no earlier than 5 minutes after the shut-off Exception : observation lift in unconditioned space 25

26 BEC Lift & Escalator Installations Min Allowable Total Power Factor (TPF) TPF of motor drive 0.85 (at the isolator connecting to building s electrical supply circuit) Lift at rated load rated speed upward Escalator / passenger conveyor at brake load rated speed (for equipment with a rise equipment travelling upward) Max Allowable Total Harmonic Distortion (THD) Circuit Fundamental Current of Motor Drive I (A) THD (%) of Motor Drive in Each Phase (at isolator connecting to building s electrical supply circuit) Lift (rated load, rated speed up) I < 40A 40% Escalator and Passenger Conveyor (no load, rated speed) 35% (direct from feeder) 40A I < 80A 35% 35% 80A I < 400A 22.5% 22.5% 400A I < 800A 15% Not applicable 40% (not direct from feeder) 26 # See remarks in next slide

27 BEC Lift & Escalator Installations # Remarks (to last slide) In fulfilling TPF & THD requirements, corresponding correction device can be installed at the source motor control centre Circuit fulfilling TPF & THD requirement not further governed by TPF & THD requirement under Electrical Installations Metering & Monitoring Facilities (for each Lift, Escalator & Passenger Conveyor) Metering devices or the provision for measurement should be provided Measuring voltage (phase-to-phase & phase-to-neutral), current (phases & neutral), power, energy consumption, max demand, TPF, THD Provision for measurement Electrical cubicle or junction box through which the electrical supply circuit passes Right beside the control panel of the motor drive Facilitate the ready connection and subsequent removal of the metering devices for measurement not entailing a stoppage or disruption to operation 27

28 BEC Other Requirements Performance-based approach Alternative BEC compliance approach Focusing on total building energy using simulation software Design energy should not exceed energy budget Relaxing certain prescriptive requirements such as LPD, COP Trade-off items of same ownership Requirements for Major Retrofitting Works Examples (for Works Area of 500 m 2 ) Replacement of luminaries with total circuit wattage < 3kW - does not have to meet LPD requirements Replacement of AHUs with cooling capacity < 60kW does not have to meet various requirements 28

EAC Requirements Objective Systematic review Energy consuming equipment / systems 1 2 3 4

/ systems Identification of EMO (Energy Management Opportunity) Cost benefit analysis of

Implement energy saving measures 5 6 Recommendations Compiling energy audit report /

29 EAC Requirements Objective Systematic review Energy consuming equipment / systems Key Steps Collection of information of the building Review of energy consuming equipment / systems Identification of EMO (Energy Management Opportunity) Cost benefit analysis of EMO Information for decision making accounting for environmental & economic benefits Implement energy saving measures 5 6 Recommendations Compiling energy audit report / Energy Audit Form Energy audit for the building, after commencement, is to complete in 6 months 29

30 EAC Requirements Energy audit report Energy utilization index (EUI) (MJ/m 2 /annum) Energy audit form (exhibit at building main entrance) Energy management opportunities (EMO) Implementation not mandatory Executive summary 30

BEC & EAC Way Forward ENB public consultation on climate change end 2010 SDC public engagement on energy

is an effective tool to improve energy saving The BEC systematic review & enhancement to align with

energy audit What gets measured gets managed Energy audit provides baseline for comparison & data to

31 BEC & EAC Way Forward ENB public consultation on climate change end 2010 SDC public engagement on energy saving in buildings Aug 2011 SDC report Mar 2012 The BEEO is welcomed by general public, and energy audit is an effective tool to improve energy saving The BEC systematic review & enhancement to align with technology advancement to tighten energy efficiency standards Facilitation of behaviour change through energy audit What gets measured gets managed Energy audit provides baseline for comparison & data to establish benchmark EMSD planning to tighten the BEC requirements, aligning with international practices & technologies 31

Energy Efficiency Office 能源效益事務處 Enquiry : 37576156 Email :

hk Address : 3 Kai Shing Street, Kowloon Website : http://www.

32 Information in this PowerPoint are extracted from the BEC /

32 Energy Efficiency Office 能源效益事務處 Enquiry : mbec@emsd.gov.hk Address : 3 Kai Shing Street, Kowloon Website : Thank You! 多謝! 32 Information in this PowerPoint are extracted from the BEC / EAC. The extract is for purpose of this presentation only, which serves to provide an overview but not the full details of the BEC / EAC requirements.

Building Energy Code (BEC) and Energy Audit Code (EAC) (2012 Edition) BEC Lighting Installations. Lighting Installations

Building Energy Code (BEC) and Energy Audit Code (EAC) (2012 Edition) for Buildings Energy Efficiency Ordinance (Chapter 610) Briefing Session 29 February 2012 Overview of BEC Key Energy Efficiency Requirements