JCM_TH_AM013_ver01.0
Sectoral scope: 03
Joint Crediting Mechanism Approved Methodology TH_AM013“Energy Saving by Introduction of High Efficiency Screw Chiller for freezing andrefrigeration”

A. Title of the methodology
Energy Saving by Introduction of High Efficiency Screw Chiller for freezing and refrigeration,
Ver.01.0

B. Terms and definitions
Terms
Screw chiller

Definitions
Screw chiller is a cooling and refrigeration machineutilizing a vapor compression refrigeration cycle equippedwith screw type compressor, a condenser, an expansion
valve and an evaporator in one unit.
Assembly of compressor, condenser, expansion valve andevaporator with interconnections, is defined as one module.
As for products of screw chiller, there are the type of single
module and multiple modules in one unit.
This methodology is applicable to a unit of multiple
modules as well as the one of single module.

Cooling capacity

Cooling capacity is the capability of individual chiller toremove heat. In this methodology, “cooling capacity” isused to represent a cooling capacity per one individual
chiller unit and not to represent package units which consistof multiple screw chillers.

Periodical checkPeriodical check is a periodical investigation of screwchiller(s) done by manufacturer or agent who is authorized
by the manufacturer, in order to maintain screw chiller(s)performance.

C. Summary of the methodology1

JCM_TH_AM013_ver01.0
Sectoral scope: 03
Items
GHG

emission

Summary
reduction This methodology applies to the project that aims for saving

measuresCalculationenergy by introducing high efficiency chiller(s).
ofreference Reference emissions are GHG emissions from the usage ofemissions

reference chiller unit, calculated by using data of power
consumption of project screw chiller(s), ratio of COPs
(Coefficient of Performance) of reference/project screw chiller
and CO2 emission factor for consumed electricity.

Calculationofproject Project emissions are GHG emissions from the usage of screw

emissionschiller(s), calculated with power consumption of screwchiller(s) and CO2 emission factor for consumed electricity.

Monitoring parameters⚫

Power consumption of project screw chiller⚫

Amount of fuel consumed and amount of electricity
generated by captive power, where applicable.

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

The project installs brine screw chiller(s) for freezing and refrigeration.
Cooling capacity of a screw chiller per one module is less than or equals to1,000 kW.

Criteria 2

COP for project screw chiller(s) calculated under the standardizing temperature
conditions (COPPJ,tc,i) is more than COP of the reference screw chiller, with thecooling capacity range same as the project screw chiller.
[equation to calculate COPPJ,tc,i]
𝐂𝐎𝐏𝐏𝐉,𝐭𝐜,𝐢 = 𝐂𝐎𝐏𝐏𝐉,𝐢 × [(𝐓𝐂𝐜𝐨𝐨𝐥𝐢𝐧𝐠−𝐨𝐮𝐭,𝐢 − 𝐓𝐂𝐜𝐡𝐢𝐥𝐥𝐞𝐝−𝐨𝐮𝐭,𝐢 + 𝐓𝐃𝐜𝐡𝐢𝐥𝐥𝐞𝐝+ 𝐓𝐃𝐜𝐨𝐨𝐥𝐢𝐧𝐠 ) ÷ (𝟑𝟕 − 𝟕 + 𝐓𝐃𝐜𝐡𝐢𝐥𝐥𝐞𝐝 + 𝐓𝐃𝐜𝐨𝐨𝐥𝐢𝐧𝐠 )]COPPJ,tc,i: COP of project screw chiller i calculated under thestandardizing temperature conditions* [-]COPPJ,i: COP of project screw chiller i under the catalog
conditions of the project screw chiller [-]TCcooling−out,i: Output cooling water temperature of project screw
chiller i set under the catalog conditions of the projectscrew chiller [degree Celsius]

TCchilled−out,i: Output chilled water temperature of project screw
chiller i set under the catalog conditions of the project2

JCM_TH_AM013_ver01.0Sectoral scope: 03
screw chiller [degree Celsius]
TDcooling: Temperature

difference

betweencondensing

temperature of refrigerant and output cooling watertemperature, 1.5 degree Celsius set as a default value[degree Celsius]
TDchilled: Temperature

difference

betweenevaporating

temperature of refrigerant and output chilled watertemperature, 1.5 degree Celsius set as a default value[degree Celsius]
The standardizing temperature conditions at which COP for project screw
chiller(s) calculated in this methodology are shown below:
Chilled water:

Cooling waterCriterion 3:output

7 degrees Celsius

input

12 degrees Celsius

output37 degrees Celsius

input

32 degrees Celsius

Ozone Depletion Potential (ODP) of the refrigerant used for screw chiller(s) iszero.

Criterion 4

A plan for prevention of releasing refrigerant used for project screw chiller isprepared. In the case of replacing the existing chiller with the project screw
chiller(s), a plan for prevention of releasing refrigerant used in the existing
chiller to the air (e.g. re-use of the equipment) is prepared. Execution of thisplan is checked at the time of verification, in order to confirm that refrigerant
used for the existing one replaced by the project is prevented from being
released to the air.

Criterion 5

Periodical check at least once a year is planned.

E. Emission Sources and GHG types
Reference emissions
Emission sources

GHG types

Power consumption by reference screw chiller(s)CO2Project emissions
Emission sources

GHG types

Power consumption by project screw chiller(s)3CO2

JCM_TH_AM013_ver01.0
Sectoral scope: 03

F. Establishment and calculation of reference emissions
F.1. Establishment of reference emissions
Reference emissions are calculated by multiplying power consumption of project screwchiller(s), ratio of COPs for reference/project screw chiller, and CO2 emission factor forconsumed electricity.
Two types of cooling systems are identified as possible systems for freezing and refrigerationin Thailand to supply cold water for production process: ice storage system with reciprocation
type compressor, and brine/water chiller with screw type compressor.
Considering the efficiency and current implementation situation, this methodology sets thecooling system with screw type compressor as the reference chiller available to brine/waterchilling.
This methodology ensures net emission reductions through the following manners:⚫

Reference COP is set to be the highest COP value (for each of two cooling capacityranges) among the marketed reference chilling system in Thailand.

F.2. Calculation of reference emissions
𝑹𝑬𝒑 = ∑{𝑬𝑪𝑷𝑱,𝒊,𝒑 × (𝑪𝑶𝑷𝑷𝑱,𝒕𝒄,𝒊 ÷ 𝑪𝑶𝑷𝑹𝑬,𝒊 ) × 𝑬𝑭𝒆𝒍𝒆𝒄 }𝒊

𝑅𝐸𝑝 : Reference emissions during the period p [tCO2/p]
𝐸𝐶𝑃𝐽,𝑖,𝑝 : Power consumption of project screw chiller i during the period p[MWh/p]
𝐶𝑂𝑃𝑃𝐽,𝑡𝑐,𝑖 : COP of project screw chiller i calculated under the standardizingtemperature conditions [-]𝐶𝑂𝑃𝑅𝐸,𝑖 : COP of reference screw chiller i under the standardizing
temperature conditions [-]𝐸𝐹𝑒𝑙𝑒𝑐 : CO2 emission factor for consumed electricity [tCO2/MWh]

G. Calculation of project emissions

𝑷𝑬𝒑 = ∑(𝑬𝑪𝑷𝑱,𝒊,𝒑 × 𝑬𝑭𝒆𝒍𝒆𝒄 )𝒊4

JCM_TH_AM013_ver01.0
Sectoral scope: 03
𝑃𝐸𝑝 : Project emissions during the period p [tCO2/p]
𝐸𝐶𝑃𝐽,𝑝 : Power consumption of project screw chiller i during the periodp [MWh/p]
𝐸𝐹𝑒𝑙𝑒𝑐 : CO2 emission factor for consumed electricity [tCO2/MWh]

H. Calculation of emissions reductions
𝑬𝑹𝒑 = 𝑹𝑬𝒑 − 𝑷𝑬𝒑
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
𝐸𝐹𝑒𝑙𝑒𝑐Description of dataSource

CO2 emission factor for consumed electricity Case 1)[tCO2/MWh].

[Grid electricity]

When the project screw chiller consumes only 1) The most recent value
grid electricity, 2) captive electricity or 3) electricity available at the time of
directly

suppliedfromothersources(e.g. validation is applied andindependent power producer (IPP), small power fixed for the monitoringproducer (SPP) and very small power producer period thereafter. The data(VSPP)) to the project site, the project participant isapplies the CO2 emission factor respectively.

sourcedfrom“GridEmission Factor (GEF) of

When the project screw chiller may consume Thailand”,

endorsedbyelectricity supplied from more than 1 electric Thailand Greenhouse Gas
source, the project participant applies the CO2 Management Organization
emission factor with the lowest value.

(TGO) unless otherwise
instructed by the Joint[CO2 emission factor]

Committee.

Case 1) Grid electricity
The most recent value available from the source Case2)
stated in this table at the time of validation[Captive electricity]
For Option a)

Case 2) Captive electricity including
5Specification of the captiveJCM_TH_AM013_ver01.0
Sectoral scope: 03
cogeneration system

power generation system

𝐸𝐹𝑒𝑙𝑒𝑐 is determined based on the following

provided

options:

manufacturer ( 𝜂𝑒𝑙𝑒𝑐 [%]).

a) Calculated from its power generation

CO2 emission factor of theefficiency (𝜂𝑒𝑙𝑒𝑐 [%]) obtained fromfossil fuel type used in themanufacturer’s specification.

captive power generation

The power generation efficiency based on lowerbythesystem (𝐸𝐹𝑓𝑢𝑒𝑙 [tCO2/GJ])

heating value (LHV) of the captive power
For Option b)
Generated and supplied
specification is applied;electricity by the captive
100
power generation system
𝐸𝐹𝑔𝑒𝑛 = 3.6 ×× 𝐸𝐹𝑓𝑢𝑒𝑙𝜂𝑒𝑙𝑒𝑐(𝐸𝐺𝑃𝐽,𝑝 [MWh/p]).
Fuel amount consumed bythecaptivepowerb) Calculated from measured datageneration system ( 𝐹𝐶𝑃𝐽,𝑝The power generation efficiency calculated from [mass or volume/p]).
monitored data of the amount of fuel input for Net
calorific
value
generation system from the manufacturer’spower generation ( 𝐹𝐶𝑃𝐽,𝑝 ) and the amount of ( 𝑁𝐶𝑉𝑓𝑢𝑒𝑙[GJ/massorelectricity generated (𝐸𝐺𝑃𝐽,𝑝 ) during the period p is volume]) and CO2 emission
applied. The measurement is conducted with the factor of the fuel ( 𝐸𝐹𝑓𝑢𝑒𝑙monitoring

equipment

towhichcalibration [tCO2/GJ]) in order ofcertificate is issued by an entity accredited under preference:national/international standards;

1) values provided by the𝐸𝐹𝑒𝑙𝑒𝑐 = 𝐹𝐶𝑃𝐽,𝑝 × 𝑁𝐶𝑉𝑓𝑢𝑒𝑙 × 𝐸𝐹𝑓𝑢𝑒𝑙 ×

1
𝐸𝐺𝑃𝐽,𝑝Where:

fuel supplier;2) measurement by the
project participants;

𝑁𝐶𝑉𝑓𝑢𝑒𝑙 : Net calorific value of consumed
fuel [GJ/mass or volume]3) regional or national
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 inIPCC

the following table may be applied to 𝐸𝐹𝑒𝑙𝑒𝑐

National GHG Inventories.

depending on the consumed fuel type.

Lower value is applied.

⚫
⚫

Guidelineson

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

Electricity generation capacity of the systemdiesel fuel]is less than or equal to 15 MW

CDM approved small scale6

JCM_TH_AM013_ver01.0
Sectoral scope: 03
methodology: AMS-I.A.
fuel type

Diesel fuelNatural gas

𝐸𝐹𝑒𝑙𝑒𝑐

0.8 *10.46 *2[Captive electricity with

*1 The most recent value at the time of validation

natural gas]

is applied.

2006 IPCC Guidelines on*2 The value is calculated with the equation in the National GHG Inventories
option a) above. The lower value of default for the source of EF ofeffective CO2 emission factor for natural gas natural gas.
(0.0543tCO2/GJ), and the most efficient value of CDM Methodological tool
default efficiency for off-grid gas turbine systems "Determining the baseline(42%) are applied.

efficiency of thermal orelectric energy generation

Case 3) Electricity directly supplied from othersystems version 02.0" forsources including cogeneration system

the default efficiency for

𝐸𝐹𝑒𝑙𝑒𝑐 is determined based on the following

off-grid power plants.

options:a) The value provided by the electricity supplierwith the evidence;b) The value calculated in the same manner for theoption a) of 2) captive electricity as instructedabove;

𝐶𝑂𝑃𝑅𝐸,𝑖Case 3)[Electricity
directly
supplied from other sources
includingcogenerationsystem]
For Option a)c) The value calculated in the same manner for theTheevidence

option b) of 2) captive electricity as instructed

information relevant to theabove;

value of emission factor

When the project screw chiller may consume(e.g.

electricity supplied from more than 1 electric

generation, type of powersource, the project participant applies the CO2plant, type of fossil fuel,emission factor with the lowest value.

period of time).

dataofstating

power

COP of the reference screw chiller i under the The default COP value isstandardizing temperature conditions

derived from the result of

The COP of the reference screw chiller i is selected survey on COP of chillers.
from the default COP values in the following tables The survey should provein line with cooling capacity of the project screw theuseofclear

chiller i. (“x” in the table represents cooling methodology. The 𝐶𝑂𝑃𝑅𝐸,𝑖capacity per unit.)

shouldnecessary

berevisedfrom

ifsurvey

result which is conducted7

JCM_TH_AM013_ver01.0
Sectoral scope: 03

𝐶𝑂𝑃𝑃𝐽,𝑖

Coolingcapacity perunit (kW)x≤520

520<x≤1,000

COPRE,i

4.97

5.02

by

JCorproject

participants.

COP of the project screw chiller i under the catalog Specifications of project
conditions of the project screw chiller

screw chiller i prepared forthe quotation or factory
acceptance test data bymanufacturer

History of the document
Version01.0

Date20 September 2021

Contents revisedElectronic decision by the Joint Committee
Initial approval.

8