JCM_VN_F_PM_ver01.0

JCM Proposed Methodology Form
Cover sheet of the Proposed Methodology Form
Form for submitting the proposed methodology
Host Country

Socialist Republic of Viet Nam

Name of the methodology proponents Yokohama Water Co., Ltd.
submitting this form
Sectoral scope(s) to which the Proposed 3. Energy demand
Methodology applies
Title of the proposed methodology, and Energy saving by introduction of high-efficiency
version number

double suction volute pumps in water supply
system, Version 01.0

List of documents to be attached to this form

The attached draft JCM-PDD:(please check):

Additional information

Date of completion

07/08/2018

History of the proposed methodology
Version1.0

Date
07/08/2018

Contents revisedFirst edition1

JCM_VN_F_PM_ver01.0

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
TermsDefinitions

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

emission

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

Calculationofreference Reference

emissionsemissions

are

GHG

emissions

from

power

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.

Calculationof

project Project emissions are GHG emissions from power consumption

emissionsby project pumps, calculated with the monitored power
consumption of project pumps and CO2 emission factor forconsumed electricity.

Monitoring parametersElectricity consumption of project pumpsThe amount of fuel consumption and the amount ofelectricity generated by captive power, where applicable2

JCM_VN_F_PM_ver01.0

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

CO2

F. 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 collected
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.

3

JCM_VN_F_PM_ver01.0

F.2. Calculation of reference emissionsࡾࡱ ࢖ = ෍൛ࡱ࡯ࡼࡶ,࢏,࢖ × ൫ࣁࡼࡶ,࢏ ÷ ࣁࡾࡱ,࢏ ൯ൟ × ࡱࡲࢋ࢒ࢋࢉ࢏

Whereܴ‫ܧ‬௣‫ܥܧ‬௉௃,௜,௣

ߟ௉௃,௜

ߟோா,௜

‫ܨܧ‬௘௟௘௖

i

Reference 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

Where‫ܴܧ‬௣ܴ‫ܧ‬௣ܲ‫ܧ‬௣۳‫܀ = ܘ ܀‬۳‫ ܘ‬− ‫۾‬۳‫ܘ‬
Emission reductions during the period p [tCO2/p]
Reference emissions during the period p [tCO2/p]
Project emissions during the period p [tCO2/p]4

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

Pump 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≤22<x≤3

3<x≤4

4<x≤5

(m3/min)ߟோா,௜Capacity

are

70.5

73.0

74.0

74.5

5<x≤6

6<x≤8

8<x≤10 10<x≤15

Capacity

75.0

75.5

76.0

76.5

fromJapaneseStandard(m3/min)ߟோா,௜

derivedtheIndustrialJISB8322“Double suction volutepumps”.

Revisionofdefaultvalues

ߟோா,௜

should be considered if15<x≤20 20<x≤30 30<x≤40

JIS B 8322 is revised.

(m3/min)ߟோா,௜Capacity

77.0

78.0

78.540<x≤50 50<x≤60 60<x≤70

3(m /min)ߟோா,௜‫ܨܧ‬௘௟௘௖

79.0

79.5

80.0

CO2 emission factor of consumed electricity.

[Grid electricity]
Ministry

5ofNatural

JCM_VN_F_PM_ver01.0

When project pumps consume only grid electricity Resourcesandor 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]

Specification

oftheFor 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 bythecaptivepowerb) Calculated from measured datagenerationsystem

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

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 captive[masscalorificandorvalue
CO2

power generation system
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EFୣ୪ୣୡ = FC୔୎,େୋ,୮ × NCV୤୳ୣ୪,େୋ × EF୤୳ୣ୪,େୋ
×

Where:

1EG୔୎,େୋ,୮

in order of preference:
1) values provided by thefuel supplier;2) measurement by theNCVfuel,CG: Net calorific value of fuel consumed byproject participants;

the captive power generation system [GJ/mass or3) regional or nationalvolume]default values;4) IPCC default values

Note:provided in tables 1.2 andIn case the captive electricity generation system

1.4 of Ch.1 Vol.2 of 2006

meets all of the following conditions, the value in

IPCC Guidelines on

the following table may be applied to EFelec

National GHG

depending on the consumed fuel type.

Inventories. Lower value
is applied.

The system is non-renewable generation
system[Captive electricity with

Electricity generation capacity of the system isdiesel fuel]less than or equal to 15 MW

CDM approved small
scale methodology:

fuel typeEFୣ୪ୣୡDiesel

Natural gas

fuel
0.8 *10.46 *2AMS-I.A.
[Captive electricity withnatural gas]

*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 of
default efficiency for off-grid gas turbine systems(42%) are applied.

2006 IPCC Guidelines on
National GHG Inventories
for the source of EF ofnatural gas.
CDM
tool

Methodological"Determining

baseline

efficiencyof

thermal or electric energy
generation
version02.0"
defaultsystemsfor

theefficiency

foroff-grid power plants.

7

the