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Joint Crediting Mechanism Approved Methodology BD_AM003“Energy efficiency improvement through the introduction of energy efficient air jet looms
in textile industry”
A. Title of the methodology
Energy efficiency improvement through the introduction of energy efficient air jet looms intextile industry, Version 01.0

B. Terms and definitions
Terms

Definitions

Air Jet Loom

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

Energy Saving Coefficient

The energy efficiency improvement achieved by the air jet(ESC)

looms introduced by the project. This parameter is
pre-determined based on the weaving speed and the power
consumption by the loom motor of the project air jet loom
and the reference rapier loom.

Shedding

The process forming "the shed" by dividing the warp ends
into two sheets, providing a path for the weft. The shed isformed raising and/or lowering frames. Among the threemain types of shedding mechanisms, Cam, Dobby, andJacquard, the methodology is applicable when Cam and/orDobby shedding is applied.

C. Summary of the methodology
Items
GHGemission

measures

Summaryreduction The methodology is applicable to the project which newly
installs energy efficient air jet loom(s) or replaces existingloom(s) by energy efficient air jet loom(s) at a textile factory.
GHG emission reductions will be achieved through electricity
savings per unit of final product.

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Calculationofreference Reference emissions are calculated by multiplying the projectemissionselectricity consumption by the loom motor(s) of the project airloom(s), the default energy saving coefficient (ESC) provided
by the methodology, and the CO2 emission factor for electricityconsumed.

Calculationofproject Project emissions are calculated by multiplying the sum of theemissions

electricity consumption by the loom motor(s) of the project air
jet loom(s) and air compressor(s), and CO2 emission factor forelectricity consumption.

Monitoring parametersTotal amount of electricity consumed by the loom motor(s)of the project air jet loom(s).

Total amount of electricity consumed by the aircompressor(s) of the project air jet loom(s).

D. Eligibility criteria

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

The air jet loom(s) are introduced at a textile factory. The air jet looms
introduced as part of the project are equipped with energy saving technologies
such as an optimized shape reed’s tunnel of nozzles and a pressure sensor tomeasure air pressure of nozzles for optimization of compressed air
consumption of weft insertion.

Criterion 2

Periodical checks of the project air jet loom(s) are conducted at least once
every calendar year.

Criterion 3

Shedding mechanism of the project air jet loom(s) is either Cam or Dobby
shedding.

Criterion 4

The effective reed width of the project air jet loom(s) is less than or equal to190 cm.

E. Emission Sources and GHG types
Reference emissions
Emission sources

GHG types

Electricity consumption by the reference rapier loom(s)Project emissions

2CO2

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Emission sources

GHG types

Electricity consumption by the loom motor(s) of the project air jet CO2loom(s)Electricity consumption by the air compressor(s) of the project air jet CO2loom(s)F. Establishment and calculation of reference emissions
F.1. Establishment of reference emissions
Reference emissions are calculated with the following parameters:
Total amount of electricity consumed by the loom motor(s) of the project air jet loom(s)[MWh/p];Default energy saving coefficient (ESC) provided by the methodology, that is determinedbased on the energy savings of the project air jet loom(s) compared to the reference rapierloom(s) [fraction]; and

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

Net emission reductions are achieved by adopting a conservative energy saving coefficient(ESC) as the methodology default value. ESC is determined as function of the loom motor'spower consumption and the weaving speed. Among various combinations of the weaving
speed and the loom motor power available for the type of fabric woven in the country, a set of
the weaving speed and the loom motor power, which lead to the most conservative ESC, areselected and used to determine the default ESC in the methodology for the project inBangladesh.
F.2. Calculation of reference emissions

RE p = å ECPJLM , p ´ ESC ´ EFelec
Where:
REp:

Reference emissions during the period p [tCO2/p]

ΣECPJLM,p:

Total electricity consumption by the motor(s) of the project air jet loom(s)during the period p [MWh/p]

ESC:

Energy saving coefficient [fraction]

EFelec:CO2 emission factor for electricity consumed by the project [tCO2/MWh]3

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G. Calculation of project emissions

PE p = (å EC PJLM , p + å EC PJAC , p )´ EFelec
Where:
PEp:

Project emissions during the period p [tCO2/p]

ΣECPJLM,p:

Total electricity consumption by the motor(s) of the project air jet loom(s)during the period p [MWh/p]ΣECPJAC,p:Total electricity consumption by the air compressor(s) of the project air jetloom(s) during the period p [MWh/p]

EFelec:CO2 emission factor for electricity consumed by the project [tCO2/MWh]

H. Calculation of emissions reductions

ERp = RE p - PE p
Where:
ERp:Emission reductions during the period p [tCO2/p]

REp:Reference emissions during the period p [tCO2/p]

PEp: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.
Parameter
ESC

Description of data

SourceEnergy saving coefficient (dimensionless)

Methodology default

Default value: 2.93
EFelecCO2 emission factor for electricity consumed [Grid electricity]by the project

The most recent publishedvalue by National CDM

Whentheproject

consumes

onlygrid Committee or any otherelectricity or captive electricity, the project relevant authority such as4

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participant applies either the grid emission JCM secretariat at the timeemission of validation

factor [EFelec,grid] or the captive
factor [EFelec,cap] respectively.

When the project consumes both grid and [Captive electricity withcaptive electricity, the project participant diesel fuel]applies the lower value of the grid or the CDM approved small scale
methodology: AMS-I.A.

captive emission factors.

[EFelec,grid]: For grid electricity, the most recent [Captive electricity withemission

factor[tCO2/MWh]ofavailable

grid natural gas]

Bangladesh
atthetimeof 2006 IPCC Guidelines on
National GHG Inventories

validation.

for the source of EF of[EFelec,cap]:

For[tCO2/MWh]*captive0.8 natural gas.

electricity,

may be applied when the CDM Methodological tool

captive generator consumes diesel fuel.

In "Determining the baseline

case of captive electricity with natural gas as efficiency of thermal or
fuel,

theemission

factorof

0.46 electric energy generation**

systems version02.0" for the[tCO2/MWh] is applied.

default efficiency for*The most recent value available from CDM off-grid power plants.
approved small scale methodology AMS-I.A
at the time of validation is applied.
**Calculated as follows:

EFelec ,cap =EFNG

h cap´ 3.6(GJ / MWh )Where:
EFNG: 0.0543tCO2/GJ, lower value of effective
CO2 emission factor for natural gas.
ηcap: 42%, default efficiency for off-grid gas
turbine system.
History of the document
Version01.0

Date
16 October 2017

Contents revisedElectronic decision by the Joint Committee
Initial approval.

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