gmv4 for power breakfast (9dec2010)

8/7/2019 GMv4 for Power Breakfast (9Dec2010)

1/19

Update on Green Mark v4.0for new commercial buildings

Steven KangCertified Energy Manager,

Certified Green Mark Professional

LEED Accredited Professional


2/19

Green Mark Rating System

2 Confidential and Proprietary Property of Trane

or ew u ngsNRNB V4.0

Effective 1-Dec-2010


3/19

Building control legislation on environmental

sustainability Mandatory to attain GM certification for

All new building with GFA equal or greater than 2000

m2 and Existing buildings with GFA equal or greater than 2000

m2 undergoing major retrofitting works


Major retrofitting worksdefined as works involving majoroverhauling of air conditioning system and significantmodifications to building faade along with other buildingservices.

Legislation


4/19

Overall frameworkNon residential Bldg. Part 1: Energy Related section



5/19

Overall frameworkNon residential Bldg. Part 2-5: Other green requirements



6/19

Green Mark RatingNon residential Bldg


Out of a possible 190 pts


7/19

PrerequisitesFor air-conditioned bldg

1. ETTV

2. Building Energy Efficiency Index (EEI)

3. Air conditioning system Efficiency


4. Water cooled chiller plant energy efficiency monitoring

Permanent monitoring system to accuracy of +/- 5%


8/19

GMv4.0 Versus GMv3.0

Summary of key differences

Pre-requisites for min chiller plant & unitary systemefficiency.

Pre-requisite for accurate M&V for water cooled chiller plantperformance.

Heat balance for water cooled chiller plant (1 point)

Reference building ACMV performance will be referenced to


(SS553 + SS530) instead (CP13 + SS530) making theReference Building ACMV system more efficient.

Maximum cap of 50pts for Energy & other greenrequirements is removed.

Full details of GMv4.0 are available athttp://www.bca.gov.sg/EnvSusLegislation/others/GM_Certification_

Std2010.pdf


9/19

NRB 1-1 ETTV Baseline: ETTV= 50 W/m2

Pre-requisite requirements

Gold plus: ETTV


10/19

NRB 1-2 Air conditioning system efficiency

1-2) Cooling plant system efficiency(Max 20pts)

1-2a) Water-cooledchiller plant

1-2b) Air-cooled chiller plant/Unitary air conditioner


Certified 0.80

Gold 0.80

Goldplus

0.70

Platinum 0.70

< >=

Certified 0.70

Gold 0.70

Goldplus

0.65

Platinum 0.65

< >=

Certified 0.90

Gold 0.90

Goldplus

0.85

Platinum 0.78

Certified 0.80

Gold

Goldplus

Platinum

Not

applicable

12pts for baseline of0.80KW/RT

0.45pts for every %improvement overbaseline

Max: 20 pts

(= 0.66KW/RT)



Max: 20 pts

(= 0.56KW/RT)



Max: 20 pts

(= 0.75KW/RT)



Max: 20 pts

(= 0.75KW/RT)


11/19


1-2C Airside energy efficiency(Max 6pts)

Constant volume Variable volume

Baseline


1.7 KW / m3/s0.47 W/CMH

2.4 KW / m3/s

0.67 W/CMH

0.2 pts for every %improvement over the

baseline

Max 6 pts

=0.33 W/CMH

0.2 pts for every %improvement over thebaseline

Max 6 pts

=0.47 W/CMH


12/19

NRB 1-2d Permanent water cooled chiller plant M&V

Pre-requisite for all water cooled chiller plant.

Overall KW/RT measurement accuracy of +/-5% per Ashare 22 &

AHRI550. Temperature sensor accuracy of +/- 0.05C

Install 2 spare thermo-wells on each side of the temperaturesensor for verification of the KW/RT measurement accuracy.



ow meter s a e nsta e on t e an oop an s abe ultrasonic or full bore electromagnetic type. An additional 1%to be included in the computation of measurement error for flowmeter.

Location and installation of measuring devices to meet

manufacturer's recommendation. Data acquisition system to have a resolution of 16bit.

All data logging with capability to trend at 1 minute samplinginterval.


13/19


NRB 1-2e Heat balance for w/c chiller plant1 point for completing the verification of chilled water plant instrument usingthe heat balance substantiating test in accordance to AHRI550/590. The

heat balance shall be conducted over the entire normal operating hours withmore than 80% of the computed heat balance within +/- 5% over a one (1)

week period.


- s or c er p an

1 point for use of variable speed controls for chilled water plant equipmentsuch as chilled water pumps and cooling tower fans to ensure better part load

plant efficiency.

NRB 1-2g CO2 controlled ventilation

1 point for use of controls to regulate outdoor airflow rate to maintain indoorCO2 concentration of


14/19

Other Air-conditioning related items

NRB 1-10C Use of energy efficient features.Examples:Heat recovery systemHeat pumpsSun pipesLift with gearless driveRe-generative liftLight shelves etc

3 points for every 1% energy savings over thetotal building energy consumption.Max: 7.5pts


NRB 3-6 Refrigerantsa) 1 point for using refrigerants with Ozone Depletion Potential (ODP) =0 OR Global

Warming Potential (GWP)


15/19

Pre-requisite for Gold Plus and Platinum


GM reference building

Building energy consumptionwith all the minimumrequirement of SS530 and

SS553

Proposed building

Building energy consumptionwith all the GREEN featuresapplied.


16/19

Reference building ACMV performanceMinimum Chiller Plant Performance (CP13+SS530) Minimum Chiller Plant Performance (SS553+SS530)

Type Condition Min eff Units Remarks Type Condition Min eff Units Remarks

Chillers Full load @ ARI

std condn

6.1 COP Chillers Full load @

ARI std condn

6.1 COP

0.58 Kwi / RT 0.58 Kwi / RT

Part load - No requirement for part load

performance

Part load - No requirement for part load performance

- -

CHWP Full load 30 KWc / Kwi CHWP Full load 349 KW/cms

(SS553 + SS530)

Reference building

GMv3 (CP13 + SS530)

Reference building

56% more


. w . w

Part load - No requirement for part loadperformance

Part load - Motors exceeding 15KW must modulate to50% of design flow @ no more than 30%

of design KWi

CWP Full load 40 KWct / Kwi CWP Full load 301 KW/cms

0.09 Kwi / RT 0.057 Kwi / RT


performance

Part load - Motors exceeding 15KW must modulate to

50% of design flow @ no more than 30%

of design KWiCT Full load 3.23 L/S / Kwi CT Full load 3.23 L/S / Kwi

0.06 Kwi / RT 0.06 Kwi / RT


performance

Part load - No requirement for part load performance

0.85 Kwi / RT 0.75 Kwi / RT

4.16 COP 4.71 COP

Chilled water plant minimum

system efficiency

Chilled water plant minimum

system efficiency

11.8% moreefficient

efficient

37% moreefficient


17/19

Type Condition Min Eff Units Remarks Type Condition Min Eff Units Remarks

Constant volume

system

Full load 0.47 W / CMH Constant

volume system

Full load 0.47 W / CMH Allowable nameplate motor KW

GreenMark v3

Reference building (SS553)

GreenMark v3

Reference building (CP13)

Reference building ACMV performance


Variable volume

s stem

Full load 0.74 W/ CMH Variable

volume s stem

Full load 0.67 W/ CMH Allowable nameplate motor KW

Part load - No requirement for part

load performance

Part load - Motor >= 11kw must able to

modulate to 50% design flow at less

than 30% of design KW

For VAVsystem, 9.5%more eff thanCP13


18/19

Simple Guide to Green Mark success

Ask for 0.60 kW/RT or better for chiller plant.

Ask for performance guarantee backed by clear

financial penalties in event of performanceshortfall.

Ask for accurate Measurement & Verification


system of at least +-5% accuracy in accordanceto international standards of ARI-550 & ASHRAEguides 14P & 22.

Ask for online internet access to monitor theplant performance.

Ask for track record.


19/19

Thank you for your attention.Thank you for your attention.

gmv4 for power breakfast (9dec2010)

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