JCM_VN_AM013_ver01.0
Sectoral scope: 03
Joint Crediting Mechanism Approved Methodology VN_AM013“Energy saving by introduction of high-efficiency double suction volute pumps in watersupply system”

A. Title of the methodology
Energy saving by introduction of high-efficiency double suction volute pumps in water supply
system, Version 01.0

B. Terms and definitions
Terms

Definitions

Double suction volute pump

A pump with a double-suction impeller which has a double
suction flow path in upstream and a double volute flow pathin downstream.

Pump efficiency

Ratio of water horsepower output from the pump to the shaft
horsepower input for the pump, which is expressed inpercentage (%) and is calculated by dividing water
horsepower output (kW) by shaft horsepower input (kW).

C. Summary of the methodology
Items
GHG

emissionmeasures

Summary
reduction High-efficiency double suction volute pump is introduced inwater supply system to save energy, which leads to GHG
emission reductions.

Calculation

ofemissions

reference Reference

emissions

areGHGemissions

frompower

consumption by reference pumps, calculated with the monitored
power consumption of project pumps, ratio of pump efficiencyof reference/project pumps and CO2 emission factor forconsumed electricity.

Calculation
emissionsofproject Project emissions are GHG emissions from power consumption
by project pumps, calculated with the monitored power1

JCM_VN_AM013_ver01.0
Sectoral scope: 03
consumption of project pumps and CO2 emission factor for
consumed electricity.
Monitoring parametersElectricity consumption of project pumps

The amount of fuel consumption and the amount ofelectricity generated by captive power, where applicable

D. Eligibility criteria
This methodology is applicable to projects that satisfy all of the following criteria.
Criterion 1

Double suction volute pump(s) with efficiency of more than 80% at a condition
for operational use is installed for water supply system at a water treatment plant.

Criterion 2

Project pump uses environmental friendly paints such as paints with 0.1% or lesslead, cadmium and tar during the production process.

E. Emission Sources and GHG types
Reference emissions
Emission sources

GHG types

Electricity consumption by reference pumps

CO2

Project emissions
Emission sources

GHG types

Electricity consumption by project pumps

CO2F. Establishment and calculation of reference emissions
F.1. Establishment of reference emissions
Reference emissions are calculated with the monitored power consumption of project pumps,
ratio of pump efficiency of reference/project pumps and CO2 emission factor for consumed
electricity.
The pump efficiency of reference pump is conservatively set as a default value in the following
manner to ensure the net emission reductions.
Pump efficiencies for high-efficiency double suction volute pump are determined in theJapanese Industrial Standard JIS B 8322 “Double suction volute pumps” based on the collected2

JCM_VN_AM013_ver01.0
Sectoral scope: 03
data of high-efficiency double suction volute pumps actually marketed in Japan. Application of
those pump efficiencies as default values for reference pumps in consideration of pumpefficiency commonly observed in Viet Nam ensures conservativeness and the net emission
reductions in this methodology.
F.2. Calculation of reference emissionsࡾࡱ ࢖ = ෍൛ࡱ࡯ࡼࡶ,࢏,࢖ × ൫ࣁࡼࡶ,࢏ ÷ ࣁࡾࡱ,࢏ ൯ൟ × ࡱࡲࢋ࢒ࢋࢉ࢏Whereܴ‫ܧ‬௣‫ܥܧ‬௉௃,௜,௣

ߟ௉௃,௜

ߟோா,௜‫ܨܧ‬௘௟௘௖iReference emissions during the period p [tCO2/p]
Power consumption of project pump i during the period p [MWh/p]
Pump efficiency of project pump i at a condition for operational use [%]Pump efficiency of reference pump i [%]CO2 emission factor for consumed electricity [tCO2/MWh]
Identification number of pump [-]G. Calculation of project emissions

Whereܲ‫ܧ‬௣‫ܥܧ‬௉௃,௜,௣‫ܨܧ‬௘௟௘௖iࡼࡱ࢖ = ෍൫ࡱ࡯ࡼࡶ,࢏,࢖ × ࡱࡲࢋ࢒ࢋࢉ ൯࢏

Project emissions during the period p [tCO2/p]
Power consumption of project pump i during the period p [MWh/p]
CO2 emission factor for consumed electricity [tCO2/MWh]
Identification number of pump [-]H. Calculation of emissions reductions

3

JCM_VN_AM013_ver01.0
Sectoral scope: 03۳‫܀ = ܘ ܀‬۳‫ ܘ‬− ‫۾‬۳‫ܘ‬Where‫ܴܧ‬௣ܴ‫ܧ‬௣ܲ‫ܧ‬௣Emission reductions during the period p [tCO2/p]
Reference emissions during the period p [tCO2/p]
Project emissions during the period p [tCO2/p]

I. Data and parameters fixed ex ante
The source of each data and parameter fixed ex ante is listed as below.
Parameterߟ௉௃,௜Description of data

SourcePump efficiency of project pump i at a condition for Specifications of project
operational use [%]pump i prepared for thequotation or factory
acceptance test data bymanufacturer.

ߟோா,௜Pump efficiency of reference pump i [%]Specifications of project
pump i prepared for theߟோா,௜ is selected from the default values in the quotation or factory

following table in line with the capacity of project acceptance test data bypump i. (“x” in the table denotes capacity per unit.)

manufacturer.

Capacity

The default values ߟோா,௜

x≤2

2<x≤3

3<x≤4

4<x≤5

(m3/min)ߟோா,௜Capacity

are

70.5

73.0

74.0

74.5

Capacity

5<x≤66<x≤88<x≤10 10<x≤1575.075.5

76.0

76.5

Capacity

fromtheIndustrialJISB

8322“Double suction volutepumps”.

Revisionof

defaultvalues

ߟோா,௜

should be considered if
15<x≤20 20<x≤30 30<x≤40(m3/min)ߟோா,௜JapaneseStandard(m3/min)ߟோா,௜

derived

77.0

78.0

78.5

40<x≤50 50<x≤60 60<x≤70

4

JIS B 8322 is revised.

JCM_VN_AM013_ver01.0
Sectoral scope: 03(m3/min)ߟோா,௜‫ܨܧ‬௘௟௘௖

79.0

79.5

80.0

CO2 emission factor of consumed electricity.

[Grid electricity]
MinistryofNatural

When project pumps consume only grid electricity Resources

andor captive electricity, the project participant applies Environment of Vietnam
the CO2 emission factor respectively.

(MONRE),

Vietnamese

DNA for CDM unless
When project pumps may consume both grid otherwise instructed byelectricity and captive electricity, the project the Joint Committee.
participant applies the CO2 emission factor withlower value.

[Captive electricity]
For the option a)[CO2 emission factor]

Specificationof

theFor grid electricity: The most recent value available captive power generationfrom the source stated in this table at the time of system provided by thevalidation

manufacturer(ηelec,CG[%]).
For captive electricity, it is determined based on theCO2 emission factor of

following options:the fossil fuel type used inthecaptivepowera) Calculated from its power generation efficiency

generation

system(ηelec,CG [%]) obtained from manufacturer’s(EFfuel,CG [tCO2/GJ])

specification
The power generation efficiency based on lower

For the option b)

heating value (LHV) of the captive power

Generated and supplied

generation system from the manufacturer’s

electricity by the captive

specification is applied;

power generation system

EFୣ୪ୣୡ = 3.6 ×100

ηୣ୪ୣୡ,େୋ× EF୤୳ୣ୪,େୋ

(EGPJ,CG,p [MWh/p]).
Fuel amount consumed bythecaptiveb) Calculated from measured datageneration

The power generation efficiency calculated from

(FCPJ,CG,pmonitored data of the amount of fuel input forvolume/p]).

power generation (FCPJ,CG,p) and the amount ofNet

5powersystem[masscalorificorvalueJCM_VN_AM013_ver01.0
Sectoral scope: 03
electricity generated (EGPJ,CG,p) during the(NCVfuel,CG [GJ/mass ormonitoring period p is applied. The measurement isvolume])conducted with the monitoring equipment to whichemission factor (EFfuel,CGcalibration certificate is issued by an entity[tCO2/GJ]) of the fuelaccredited under national/international standards;

consumed by the captiveEFୣ୪ୣୡ = FC୔୎,େୋ,୮ × NCV୤୳ୣ୪,େୋ × EF୤୳ୣ୪,େୋ

power generation system

×

Where:

1

EG୔୎,େୋ,୮

and

CO2

in order of preference:
1) values provided by thefuel supplier;

NCVfuel,CG: Net calorific value of fuel consumed by2) measurement by thethe captive power generation system [GJ/mass orproject participants;

volume]3) regional or nationaldefault values;

Note:4) IPCC default values

In case the captive electricity generation systemprovided in tables 1.2 andmeets all of the following conditions, the value in

1.4 of Ch.1 Vol.2 of 2006

the following table may be applied to EFelec

IPCC Guidelines on

depending on the consumed fuel type.

National GHG
Inventories. Lower valueThe system is non-renewable generation

is applied.

systemElectricity generation capacity of the system is[Captive electricity withless than or equal to 15 MW

diesel fuel]CDM approved small

fuel typeEFୣ୪ୣୡDiesel

Natural gas

fuel
0.8 *1scale methodology:
AMS-I.A.

0.46 *2[Captive electricity with

*1 The most recent value at the time of validation isapplied.
*2 The value is calculated with the equation in theoption a) above. The lower value of default
effective CO2 emission factor for natural gas(0.0543 tCO2/GJ), and the most efficient value ofdefault efficiency for off-grid gas turbine systems(42%) are applied.

natural gas]
2006 IPCC Guidelines on
National GHG Inventories
for the source of EF ofnatural gas.
CDMtoolMethodological"Determining

baseline

efficiency

theofthermal or electric energy6JCM_VN_AM013_ver01.0
Sectoral scope: 03
generation
version02.0"
default

systemsfor

theefficiency

foroff-grid power plants.

History of the document
Version01.0

Date29 August 2018

Contents revised
Decision by the Joint Committee
Initial approval.

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