JCM_TH_AM004_ver01.0
Sectoral scope: 03
Joint Crediting Mechanism Approved Methodology TH_AM004“Installation of energy saving air jet loom at textile factory”
A. Title of the methodology
Installation of energy saving air jet loom at textile factory, Version 01.0

B. Terms and definitions
Terms

Definitions

Air jet loom

A loom which uses a jet of air to propel the weft yarn throughthe shed

Specific electricity consumption Amount of electricity to generate one unit of compressed airof the air compressors
Specific air consumption of the Amount of compressed air to weave one unit of fabric
air jet loom

C. Summary of the methodology
Items
GHG

emissionmeasures

Summary
reduction Replacement of existing air jet looms at textile factory with theones equipped with energy saving technology reduces
compressed air consumption and leads to reducing electricity
consumption by the compressor, and consequently GHG
emission reductions.

Calculation

ofemissions

reference Reference emissions are calculated with amount of fabricproduced in the project, the specific air consumption of theproject air jet loom, reduction rate of air consumption, thespecific electricity consumption of the air compressors and CO2
emission factor for electricity consumed.

Calculationemissions

ofproject Project emissions are calculated with amount of fabric producedin the project, the specific air consumption of the project air jetloom, the specific electricity consumption of the air compressors
and CO2 emission factor for electricity consumed.

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JCM_TH_AM004_ver01.0
Sectoral scope: 03Monitoring parameters

Amount of fabric woven in the project

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

The project replaces existing air jet looms at a weaving factory with air jet looms
equipped with energy saving technologies such as an optimized shape reed’stunnel of nozzles and a pressure sensor to measure air pressure of nozzles for
optimization of compressed air consumption of welt insertion.

Criterion 2

The air jet looms which are installed by the project reduce the specific air
consumption by at least 15% compared with the reference air jet looms in linewith the description in Section I of this methodology.

E. Emission Sources and GHG types
Reference emissions
Emission sources

GHG types

Electricity consumption by air compressors to generate compressed air CO2
for the reference air jet looms
Project emissions
Emission sources

GHG types

Electricity consumption by air compressors to generate compressed air CO2
for the project air jet looms

F. Establishment and calculation of reference emissions
F.1. Establishment of reference emissions
Reference emissions are calculated with the following parameters:


Amount of fabric produced in the project at each project factory [m/p], which is expressedas the amount of fabric produced as per the project air jet loom type which is determinedby, for example, a model of the project air jet loom by the manufacturer during themonitoring period;

Specific air consumption as per the project air jet loom type at each project factory[Nm3/m], which is expressed as amount of compressed air to weave one unit of fabric;2

JCM_TH_AM004_ver01.0
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Reduction rate of specific air consumption at each project factory [%], which is expressedas the average of reduction rates of specific air consumptions by the project air jet loom tospecific air consumptions by the reference air jet loom as per fabric type;Specific electricity consumption of the air compressors at each project factory [kWh/Nm3],
which is expressed as amount of electricity to generate one unit of compressed air; and

CO2 emission factor for electricity consumed [tCO2/kWh].

Net emission reductions are achieved by setting specific air consumption as per the project air
jet loom type at each project factory at a minimum value in line with the description in Section Iof this methodology.
Specific electricity consumption of the compressor(s) is recalculated in line with Section I
below if any of the existing compressors is replaced with a new one, or the configuration ofcompressors connected to supply compressed air to the project air jet looms is changed at thetime of or after registration of the project.
F.2. Calculation of reference emissionsܴ‫ܧ‬௣ = ෍ ൭ܵ‫ܥܧ‬௝ × ෍(ܵ‫ܥܣ‬௉௃,௜,௝ × ‫ܲܣ‬௉௃,௜,௝,௣ ) ÷ ൬1 −௝௜ܴܴ௜,௝
൰ × ‫ܨܧ‬௘௟௘௖,௝ ൱
100Where:
ܴ‫ܧ‬௣ܵ‫ܥܧ‬௝ܵ‫ܥܣ‬௉௃,௜,௝ܴܴ௜,௝‫ܲܣ‬௉௃,௜,௝,௣‫ܨܧ‬௘௟௘௖,௝
i: Reference emissions during the period p [tCO2/p]: Specific electricity consumption of the air compressors at the project
factory j [kWh/Nm3]: Specific air consumption of the project air jet loom type i at the project
factory j [Nm3/m]: Reduction rate of specific air consumption of the project air jet loom type iat the project factory j [%]: Amount of fabric woven by the project air jet loom type i at the project
factory j during the period p [m/p]: CO2 emission factor for consumed electricity at the project factory j[tCO2/kWh]: Identification number of the project air jet loom type, differentiated3

JCM_TH_AM004_ver01.0Sectoral scope: 03
according to, for example, models
j: Identification number of the project factory

G. Calculation of project emissionsܲ‫ܧ‬௣ = ෍ ൭ܵ‫ܥܧ‬௝ × ෍(ܵ‫ܥܣ‬௉௃,௜,௝ × ‫ܲܣ‬௉௃,௜,௝,௣ ) × ‫ܨܧ‬௘௟௘௖,௝ ൱௝Where:௜ܲ‫ܧ‬௣: Project emissions during the period p [tCO2/p]ܵ‫ܥܣ‬௉௃,௜,௝

: Specific air consumption of the project air jet loom type i at the projectܵ‫ܥܧ‬௝

‫ܲܣ‬௉௃,௜,௝,௣

: Specific electricity consumption of the air compressors at the project factory j[kWh/Nm3]
factory j [Nm3/m]: Amount of fabric woven at the project air jet loom type i at the project factoryj during the period p [m/p]‫ܨܧ‬௘௟௘௖,௝

: CO2 emission factor for consumed electricity at the project factory ji: Identification number of the project air jet loom type, differentiated according[tCO2/kWh]to, for example, models

j: Identification number of the project factory

H. Calculation of emissions reductions

Where:‫ܴܧ‬௣

ܴ‫ܧ‬௣
ܲ‫ܧ‬௣

‫ܴܧ‬௣ = ܴ‫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]4

JCM_TH_AM004_ver01.0
Sectoral scope: 03I. Data and parameters fixed ex ante
The source of each data and parameter fixed ex ante is listed as below.
Parameterܵ‫ܥܧ‬௝

Description of dataSource

Specific electricity consumption of the air

Performance curve of
3compressors at the project factory j [kWh/Nm ]the air compressors fromtheir manufacturers

The default value is fixed ex ante for each project by
the project participant.
ܵ‫ܥܧ‬௝ is calculated from the linear function of shaft

power [kW] and generated compressed air [Nm3/h] ofthe compressors which are used to supply compressed
air to the project air jet looms at the project factory j,
assuming that the compressor is operating at thehighest efficiency, determined from the performance
curve of the compressors.
In case that multiple air compressors are used at theproject factory, the most conservative value (i.e. thehighest efficiency) is selected as the default value
regardless of the capacity or the model of thecompressors.
In case that any of the existing compressors isreplaced with a new compressor, or the configurationof compressors connected to supply compressed air tothe project air jet looms of the project is changed
after registration, ܵ‫ܥܧ‬௝ for the corresponding factory

is recalculated in the same manner described above.
ܵ‫ܥܣ‬௉௃,௜,௝

Specific air consumption of the project air jet loom
3

type i at the project factory j [Nm /m]Experimental data fromthe manufacture of theproject air jet looms

The default value is fixed as the minimum value of
air consumption by the project air jet loom type,5

JCM_TH_AM004_ver01.0
Sectoral scope: 03
based on the data collected for the all fabric types
woven at the project site as per the factory byexperimental data from the manufacture of the project
air jet looms (e.g.. consumption of compressed air
and amount of fabric woven).
In the case that only one fabric type is woven at theproject factory, multiple data (at least two) of thecorresponding fabric type are collected.
In determining the default value, the fabric typewoven at the project factory is categorized preceding
the installation of the project air jet loom. Fabric typeis defined by the value calculated by weft density
multiplied by fabric width. The choice of fabric typeis explained by, for example, the most recent fabricproduction inventory or production plan of thefactory before the start date of project operation. The
fabric is regarded as the same type if the variation of
the value calculated as indicated above within one
category of fabric type does not differ by more thanplus or minus 5% in the value of fabric type. In caseseveral fabric types are within the 5% range, choose
the closest one to the fabric type woven by theproject.
ܴܴ௜,௝Reduction rate of specific air consumption of theBased on project andproject air jet loom type i at the project factory j [%]reference specific air
consumption collected

The value is fixed as an average of reduction rate ofspecific air consumption for each fabric type woven
as per project air-jet loom type in the project factory.
Reduction rate of specific air consumption iscalculated for each project as per a project air jetloom type at the project factory in the following
manner:6

as per the projectJCM_TH_AM004_ver01.0
Sectoral scope: 03- The reference air jet looms are defined as one of thefollowing whichever is produced at a later date:1) the previous model of air jet looms produced by
the same manufacture of the project air jet loom by
one generation (e.g. a substantial model change
which leads to reduction of air consumption)2) existing air jet looms in the project factory- Collect dataset of specific air consumption byreference air jet looms (ܵ‫ܥܣ‬ோா )1) for the previous model of air jet looms, in a samemanner as to that of the project air jet looms in linewith this Section2) for the existing air jet looms, in a same manner asto that of the project air jet looms in line with thisSection except data of consumption of compressed airand amount of fabric woven. These data are directly
measured with measuring equipment at the existing
air jet looms in a same manner as to that of theproject air jet looms.
- Compare the specific air consumption of reference
air jet looms to that of project air jet looms as per thefabric type and calculate the reduction rate as
following manner:
Calculate reduction rates of specific air consumption
comparing that of the project air jet loom and thereference air jet loom according to the categories offabric type established above and average the derivedvalues. Reduction rate of specific air consumption of
the project air jet loom type i at the project factory j isexpressed by the following formula, where i, j and k
are suffixes denoting air jet loom type, factory andfabric type.

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JCM_TH_AM004_ver01.0
Sectoral scope: 03௠ܵ‫ܥܣ‬௉௃,௜,௝,௞
1ܴܴ௜,௝ = ෍ ቈ(1 −) × 100቉݉ܵ‫ܥܣ‬ோா,௝,௞௞ୀଵ‫ܨܧ‬௘௟௘௖,௝

CO2 emission factor for consumed electricity in the [Grid electricity]
project factory j [tCO2/kWh]

The most recent value
available at the time of

When only grid electricity or captive electricity is validation is applied andconsumed in the project factory, the project fixed for the monitoring
participant

applies

theCO2emission

factor period thereafter. The

respectively.

data is sourced from
“Grid Emission Factor

When both grid electricity and captive electricity may (GEF)

ofThailand”,

be consumed in the project factory, the project endorsed by Thailand
participant applies the CO2 emission factor with Greenhouse
lower value.

GasManagementOrganization[CO2 emission factor]

unlessotherwise instructed by

For grid electricity: The most recent value available the Joint Committee.
from the source stated in this table at the time ofvalidation[Captive electricity]
For the option a)

For captive electricity, it is determined based on theSpecificationoffollowing options:captive

powergeneration

systema) Calculated from its power generation efficiency

provided(ηelec [%]) obtained from manufacturer’s specification

manufacturer (ηelec [%]).

The power generation efficiency based on lower

CO2 emission factor ofheating value (LHV) of the captive power generation

the fossil fuel type usedsystem from the manufacturer’s specification isin the captive power

applied;generation‫ܨܧ‬௘௟௘௖ = 3.6 ×100× ‫ܨܧ‬௙௨௘௟ߟ௘௟௘௖

bythethesystem(EFfuel [tCO2/GJ])
For the option b)b) Calculated from measured data

Generated and supplied

The power generation efficiency calculated fromelectricity by the captive

monitored data of the amount of fuel input for power

power8generation

JCM_TH_AM004_ver01.0
Sectoral scope: 03
generation (‫ܥܨ‬௉௃,௣ ) and the amount of electricitygenerated (‫ܩܧ‬௉௃,௣ ) during the monitoring period p is[MWh/p]).

applied. The measurement is conducted with theFuel amount consumed

monitoring equipment to which calibration certificate

by the captive poweris issued by an entity accredited undergeneration

national/international standards;(FCPJ,p‫ܨܧ‬௘௟௘௖ = ‫ܥܨ‬௉௃,௣ × ܰ‫ܸܥ‬௙௨௘௟ × ‫ܨܧ‬௙௨௘௟ ×

Where:

1‫ܩܧ‬௉௃,௣

system(EGPJ,psystem[massweight/p]).
Netcalorific(NCVfuelvalue[GJ/massorandCO2ܰ‫ܸܥ‬௙௨௘௟ : Net calorific value of consumed fuel weight])[GJ/mass or weight]

oremission factor of thefuel (EFfuel [tCO2/GJ]) in
Note:order of preference:

In case the captive electricity generation system

1) values provided bymeets all of the following conditions, the value in thethe fuel supplier;following table may be applied to ‫ܨܧ‬௘௟௘௖ depending2) measurement by theon the consumed fuel type.

project participants;

・ The system is non-renewable generation system

3) regional or national・ Electricity generation capacity of the system isdefault values;

less than or equal to 15 MW

4) IPCC default values
provided in tables 1.2fuel type‫ܨܧ‬௘௟௘௖Dieselfuel

Natural gas

0.8 *10.46 *2

and 1.4 of Ch.1 Vol.2 of2006 IPCC Guidelines
on National GHG
Inventories. Lower*1 The most recent value at the time of validation isvalue is applied.

applied.
*2 The value is calculated with the equation in the[Captive electricity withoption a) above. The lower value of default effective

diesel fuel]CO2 emission factor for natural gas (0.0543tCO2/GJ),

CDM approved small

and the most efficient value of default efficiency forscale methodology:off-grid gas turbine systems (42%) are applied.

AMS-I.A.
[Captive electricity withnatural gas]
2006 IPCC Guidelines
on National GHG

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JCM_TH_AM004_ver01.0
Sectoral scope: 03
Inventories for thesource of EF of naturalgas.
CDM Methodologicaltool "Determining thebaseline efficiency ofthermal or electricenergy generation
systems version02.0" forthe default efficiency foroff-grid power plants.

History of the document
Version01.0

Date
21 August 2017

Contents revised
JC3, Annex 9
Initial approval.

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