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Case Study - Performance verifications in Singapore
• The information submitted in the Singapore annual performance verification is of high level
nature, and is suitable for high level benchmarking: comparing Energy Efficiency Index [EEI
– kWh/sqm/year] after normalising for different building activities and area breakdown.
• For the Three Yearly Audit, the information submitted is significantly more detailed than
the annual submission, on top of the high level benchmark, such as EEI, objective plant
efficiencies are also to be recorded and reported.
• Other than high level EUI type targets, Hong Kong can also consider efficiency based targets
that directly assess the operating performance of cooling equipment.
Efficiency
Unit
Chiller(s) efficiency
kW/RT
Chilled water pump(s) efficiency
kW/RT
Condenser water pump(s)*
kW/RT
Cooling tower(s) efficiency*
kW/RT
Overall chiller plant efficiency
kW/RT
* Not applicable to air-cooled chilled water plant
Summary of Chilled Water Plant Performance
Implementation step
• Stage 1 – Upon project completion
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9
Checking of documentary evidence, site testing and verification
• Stage 2 – 1 year after Occupation Permit (OP)
9
9
Verification of proposed energy model (i.e. how much energy can be saved)
9
9
12-month of actual operational data is required
Stage 1
Stage 2
*Only for GM
Platinum and
Gold
PLUS
projects
Has the project met all Green Mark
requirements for its target rating?
Validation of energy savings based on
actual building operation and 12-month
energy consumption
Is the committed energy savings achieved?
Green Mark rating is awarded
Developers should rectify all non-
compliances in 3 months
Carry out another validation exercise over
the next 12 months
Is it the first submission?
Owners should state the non-compliance
reasons:
Green Mark rating is not
awarded
YES
YES
YES
NO
NO
NO