Singapore’s Green Building
EnergyEfficiency Standards

Evolution of BCA Green Mark Standard
200520072008

2010

2012

2015

Version 1.0

Version 2.0

Version 3.0

Version 4.0

Version 4.1

GM NRB: 2015

Other GreenIEQ Features
4%[PERCENTAGE]

Smart &Healthy
Building
21%

Environmental
Protection
22%

Water GM NRB V4.1
Efficiency(2012)
9%

EnergyEfficiency
61%

Advanced
Green
Efforts
15%

Climatic
Responsive
Design22%

GM NRB: 2015Building
GM ENRB: 2017Energy
Resource
Performanc
Stewardship
e21%
21%

BCA Green Mark for Existing Non-Residential
Buildings 2017 (GM ENRB: 2017)• Launched for piloting in September 2017 Energy monitoring- Sub-metering- Energy dashboard/ portal

 Demand Control
 Integration & Analytics- System integration & optimisation- Demand response- Preventive maintenance Occupant Comfort-Post Occupancy Evaluation
Thermal comfort withelevated air speed
IAQ audit

 Indoor Air Quality-IAQ trending & monitoring
IAQ display
Demand control ventilation
Local exhaust & air purging
systemOutdoor airflow monitoring
systemMERV 14 filters for outdoor
air filtration

3GM ENRB: 2017 – Section 2 Building EnergyPerformance
Air-Conditioning System Efficiency
Encourages measurement of air distribution system efficiency

High potential savings inair distribution system

Building Cooling Load (RT)Green Mark Rating< 500≥ 500

Minimum Efficiency (kW/RT)
Certified

0.85

0.75

Gold0.80 (v3)  0.75

0.70

GoldPlus

0.75 (v3)  0.7

0.68

Platinum

0.70 (v3)  0.68

0.65

Baseline for Air Distribution Efficiency(voluntary basis): 0.28 kW/RT

Total air con system score = score water + score air4

GM ENRB: 2017 – Section 1 Sustainable
Management
Performance-based Procurement forRetrofits and MaintenanceEncourages Energy Performance Contract (EPC) by EPC firms
accredited by the Singapore Green Building Council (SGBC)For EE Retrofits•

Centralised chilled water system•

Air distribution system

For Maintenance (min. 3 years)•

Centralised chilled water system•

Air distribution system

5

GM ENRB: 2017 – Measurement & Verification(M&V) for VRF Systems
Poor Installation Lead to Poor Performance & Breakdown of Aircon
Poor Location of Outdoorab.

 Poor heat exchange due to recirculating of the hot air discharged
 Increase in high pressure & energy consumption
 Poor performance & drop in efficiency
 Shorten life span of equipment.
Enclosed
Hot air recirculated due to theenclosed high wall

EnclosedHigh ambient
temp ≈46 oC.
Enclosed
Install cowl & Raise Units forbetter Air Circulationc

Poor Location of Indoor Unitsd

 Short-cycling of cold air lead topoor performance

67

Energy Management - VRV System Efficiency• An efficiency report based on all the VRV systems in a building can be generated.
• Most of the building system efficiency measured does not have a good result

Before tuning

AVE COP 3.72

≈37% Improve!

After tuning

AVE COP 5.12Zero Energy Building – Challenges
Climate : Hot & Humid
Land area: Scarce

Singapore’s context:
High Rise High Density Urban Tropics

Renewable Energy Options: Limited
Physical : High-rise & Dense
Roof Space: Small

BUILDINGS
Behaviour: Reliance on air-conditioners

LIFESTYLE Energy consumption: High

Solar is the ONLY
Renewable Energy8PE-ZE-SLEB Definition and Targets
Positive Energy

Energy Efficiency &Renewable Energy

Super Low Energy• Highest Energy Efficiency• Consumption Includes Plug Load• On-site and Off-Site Renewable Energy

Key Characteristics

Applicability

Zero Energy• Low Rise (1-3 storey)• School, IHL• Mid Rise (4-7 storey)• School, IHL, Office•

RE > EC••••

RE : Renewable energy
EC : Energy consumption

EEI: < 100 kWh/m2.yr
EC = RE•• High Rise (>=8 storey)• Office, Retail, Hotel

EEI: < 100 kWh/m2.yr

EEI is 60% less than 2005 building codelevel9

ZEB @ BCA Academy
More than 30 technologies
testbeddedCurrent EUI(Air-con Area):
82 kWh/m2.yr

Successful demonstration of solar PV for
existing office building

8 years of energy surplus10ZEB@BCAA Inspires More ZEB Developments

MOE School
BCAA Campus Devt
ZEB Plus (Low-rise)
ZEB 2.0 (Mid-rise)
SLEB (High-rise)

NUS Net Zero Building

BCAA ZEBHeartQuarter GUI
SAS Zero Net Energy Campus
SLA St John Island

SIT New Campus @ Punggol

PE-ZE-SLEB Technology Roadmap• Defines Singapore’s PE-ZE-SLEB• Comprehensive technology review
solar renewable technologies)(incl.

• Policy Recommendations & future
research & development anddemonstration (RD&D) pathway

12End of Presentation

Mr Toh Eng ShyanDirector
Green Mark Department (Existing Building)
Building and Construction Authority
Singapore