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 HOYA Corporation
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 Highversion number

Efficiency Inverter Type Centrifugal Chiller,
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 edition

1JCM_VN_F_PM_ver01.0

A. Title of the methodology
Energy Saving by Introduction of High Efficiency Inverter Type Centrifugal Chiller, Version
01.0

B. Terms and definitions
Terms

Definitions

Inverter type centrifugal chiller

An inverter type centrifugal chiller is a chiller whichcontains inverter, an apparatus to control the speed of thecompressor motor in order to maintain the ambient
temperature, and includes a centrifugal compressor.

Cooling capacity

The capability of individual chiller to remove heat. In thismethodology, “cooling capacity” is used to represent a
cooling capacity per one chiller unit and not for a systemwith multiple chiller units.

Periodical check

A periodical investigation of chiller done by manufacturer
or agent who is authorized by the manufacturer, in order tomaintain chiller performance.

C. Summary of the methodology
Items
GHG

emission

Summary
reduction High efficiency centrifugal chiller with inverter technology ismeasures

introduced to save energy, which leads to GHG emission
reductions.

Calculationofreference Reference emissions are GHG emissions from using reference

emissionschiller, calculated with power consumption of project chiller,
ratio of COPs (Coefficient Of Performance) of reference/projectchillers and CO2 emission factor for electricity consumed.

Calculationofproject Project emissions are GHG emissions from using project chiller,

emissionscalculated with power consumption of project chiller and CO2
emission factor for electricity consumed.

Monitoring parameters

Power consumption of project chiller2

JCM_VN_F_PM_ver01.0



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

Project chiller is an inverter type centrifugal chiller with a capacity which isless than or equals to 1,500 USRt.
*1 USRt = 12,000 BTU/hr = 3.52 kW

Criterion 2

COP for project chiller i calculated under the standardizing temperature
conditions* (COPPJ,tc,i) is more than the threshold COP values set in the tables
below. (“x” in the table represents cooling capacity per unit.)
Cooling capacity perunit (USRt)300≤x<450450≤x<550550≤x<825825≤x≤1,500Threshold COP value

5.59

5.69

5.85

6.06

COPPJ,tc,i is calculated by altering the temperature conditions of COP ofproject chiller i (COPPJ,i) from the project specific conditions to thestandardizing conditions. COPPJ,i is derived from specifications prepared forthe quotation or factory acceptance test data by manufacturer.
[equation to calculate COPPJ,tc,i]
𝐂𝐎𝐏𝐏𝐉,𝐭𝐜,𝐢 = 𝐂𝐎𝐏𝐏𝐉,𝐢 × [(𝐓𝐜𝐨𝐨𝐥𝐢𝐧𝐠−𝐨𝐮𝐭,𝐢 − 𝐓𝐜𝐡𝐢𝐥𝐥𝐞𝐝−𝐨𝐮𝐭,𝐢 + 𝐓𝐃𝐜𝐡𝐢𝐥𝐥𝐞𝐝+ 𝐓𝐃𝐜𝐨𝐨𝐥𝐢𝐧𝐠 ) ÷ (𝟑𝟕 − 𝟕 + 𝐓𝐃𝐜𝐡𝐢𝐥𝐥𝐞𝐝 + 𝐓𝐃𝐜𝐨𝐨𝐥𝐢𝐧𝐠 )]COPPJ,tc,i: COP of project chiller i calculated under the standardizing
temperature conditions* [-]COPPJ,i: COP of project chiller i under the project specificconditions [-]Tcooling−out,i: Output cooling water temperature of project chiller i set
under the project specific conditions [degree Celsius]

Tchilled−out,i: Output chilled water temperature of project chiller i set
under the project specific conditions [degree Celsius]

TDcooling: Temperature difference between condensing temperatureof refrigerant and output cooling water temperature,
1.5 degree Celsius set as a default value [degree Celsius]3

JCM_VN_F_PM_ver01.0

TDchilled: Temperature difference between evaporating temperatureof refrigerant and output chilled water temperature,
1.5 degree Celsius set as a default value [degree Celsius]

Criterion 3*The standardizing temperature conditions to calculate COPPJ,tc,i
Chilled water:
output7 degrees Celsius
input
12 degrees Celsius
Cooling water:
output 37 degrees Celsius
input
32 degrees Celsius
Periodical check is planned more than one (1) time annually.

Criterion 4Ozone Depletion Potential (ODP) of the refrigerant used for project chiller iszero.

Criterion 5

A plan for prevention of releasing refrigerant used for project chiller isprepared. In the case of replacing the existing chiller with the project chiller, aplan for prevention of releasing refrigerant used in the existing chiller to theair (e.g. re-use of the equipment) is prepared. Execution of this plan ischecked 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.

E. Emission Sources and GHG types
Reference emissions
Emission sources

GHG types

Power consumption by reference chiller

CO2Project emissions
Emission sources

GHG types

Power consumption by project chiller

CO2F. Establishment and calculation of reference emissions
F.1. Establishment of reference emissions
Reference emissions are calculated by multiplying power consumption of project chiller, ratioof COPs for reference/project chillers, and CO2 emission factor for electricity consumed.
The COP of reference chiller is conservatively set as a default value in the following manner toensure the net emission reductions.
4

JCM_VN_F_PM_ver01.0

1. The reference COP value varies by its cooling capacity.
2. The maximum values of COP in each cooling capacity range set for this methodology aredefined as COPRE,i as described in Section I.
F.2. Calculation of reference emissions

𝑹𝑬𝒑 = ∑{𝑬𝑪𝑷𝑱,𝒊,𝒑 × (𝑪𝑶𝑷𝑷𝑱,𝒕𝒄,𝒊 ÷ 𝑪𝑶𝑷𝑹𝑬,𝒊 ) × 𝑬𝑭𝒆𝒍𝒆𝒄 }𝒊

𝑪𝑶𝑷𝑷𝑱,𝒕𝒄,𝒊 = 𝑪𝑶𝑷𝑷𝑱,𝒊 × [(𝑻𝒄𝒐𝒐𝒍𝒊𝒏𝒈−𝒐𝒖𝒕,𝒊 − 𝑻𝒄𝒉𝒊𝒍𝒍𝒆𝒅−𝒐𝒖𝒕,𝒊 + 𝑻𝑫𝒄𝒉𝒊𝒍𝒍𝒆𝒅 + 𝑻𝑫𝒄𝒐𝒐𝒍𝒊𝒏𝒈 )÷ (𝟑𝟕 − 𝟕 + 𝑻𝑫𝒄𝒉𝒊𝒍𝒍𝒆𝒅 + 𝑻𝑫𝒄𝒐𝒐𝒍𝒊𝒏𝒈 )]Where𝑅𝐸𝑝

Reference emissions during the period p [tCO2/p]

𝐸𝐶𝑃𝐽,𝑖,𝑝Power consumption of project chiller i during the period p [MWh/p]

𝐶𝑂𝑃𝑃𝐽,𝑡𝑐,𝑖

COP of project chiller i calculated under the standardizing temperatureconditions [-]𝐶𝑂𝑃𝑅𝐸,𝑖

COP of reference chiller i under the standardizing temperature conditions [-]𝐸𝐹𝑒𝑙𝑒𝑐CO2 emission factor for consumed electricity [tCO2/MWh]

𝐶𝑂𝑃𝑃𝐽,𝑖

COP of project chiller i under the project specific conditions [-]𝑇𝑐𝑜𝑜𝑙𝑖𝑛𝑔−𝑜𝑢𝑡,𝑖Output cooling water temperature of project chiller i set under the project
specific conditions [degree Celsius]

𝑇𝑐ℎ𝑖𝑙𝑙𝑒𝑑−𝑜𝑢𝑡,𝑖Output chilled water temperature of project chiller i set under the project
specific conditions [degree Celsius]

𝑇𝐷𝑐ℎ𝑖𝑙𝑙𝑒𝑑

Temperature difference between condensing temperature of refrigerant andoutput cooling water temperature, 1.5 degree Celsius set as a default value[degree Celsius]

𝑇𝐷𝑐𝑜𝑜𝑙𝑖𝑛𝑔

Temperature difference between evaporating temperature of refrigerant andoutput chilled water temperature, 1.5 degree Celsius set as a default value[degree Celsius]i

Identification number of project chiller

G. Calculation of project emissions

5

JCM_VN_F_PM_ver01.0

𝐏𝐄𝐩 = ∑(𝐄𝐂𝐏𝐉,𝐢,𝐩 × 𝐄𝐅𝐞𝐥𝐞𝐜 )𝐢Where𝑃𝐸𝑝

Project emissions during the period p [tCO2/p]

𝐸𝐶𝑃𝐽,𝑖,𝑝Power consumption of project chiller i during the period p [MWh/p]

𝐸𝐹𝑒𝑙𝑒𝑐CO2 emission factor for consumed electricity [tCO2/MWh]

H. Calculation of emissions reductions
𝐄𝐑 𝐩 = 𝐑𝐄𝐩 − 𝐏𝐄𝐩
Where𝐸𝑅𝑝

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 data

SourceCO2 emission factor for consumed electricity.

[Grid electricity]
Ministry

When projectchillers consumeof

Naturalonly grid Resources and Environment

electricity or captive electricity, the project ofVietnam(MONRE),

participant applies the CO2 emission factor Vietnamese DNA for CDM
respectively.

unless otherwise instructedby the Joint Committee.

When project chillers may consume both gridelectricity and captive electricity, the project [Captive electricity]
participant applies the CO2 emission factor with For the option a)lower value.

Specification of the captivepower
6generation

systemJCM_VN_F_PM_ver01.0[CO2 emission factor]

provided by the manufacturer

For grid electricity: The most recent value (ηelec,CG [%]).
available from the source stated in this table at CO2 emission factor of thethe time of validation

fossil fuel type used in thecaptive

For captive electricity, it is determined based on

powergeneration

system (EFfuel,CG [tCO2/GJ])

the following options:
For the option b)a) Calculated from its power generation

Generated

efficiency (ηelec,CG [%]) obtained fromelectricity by the captive

manufacturer’s specification

power

The power generation efficiency based on lower(EGPJ,CG,p [MWh/p]).

heating value (LHV) of the captive power

Fuel amount consumed bygeneration system from the manufacturer’s

the captive power generation

specification is applied;system (FCPJ,CG,p [mass orEFelec = 3.6 ×100
ηelec,CG× EFfuel,CGandsupplied

generation

systemvolume/p]).
Netcalorific(NCVfuel,CGvalue[GJ/massorb) Calculated from measured datavolume]) and CO2 emission

The power generation efficiency calculated fromfactor (EFfuel,CG [tCO2/GJ]) ofmonitored data of the amount of fuel input for

the fuel consumed by thepower generation (FCPJ,CG,p) and the amount of

captive

powergenerationelectricity generated (EGPJ,CG,p) during thesystem

inordermonitoring period p is applied. The measurement

preference:is conducted with the monitoring equipment to1) values provided by thewhich calibration certificate is issued by an entity

fuel supplier;accredited under national/international standards;

2) measurement by theEFelec = FCPJ,CG,p × NCVfuel,CG × EFfuel,CG

project participants;

13) regional or national

×EGPJ,CG,pof

default values;

Where:

4) IPCC default values

NCVfuel,CG: Net calorific value of fuel consumed

provided in tables 1.2 and 1.4

by the captive power generation system [GJ/massof Ch.1 Vol.2 of 2006 IPCC

or volume]

Guidelines on National GHG
Inventories. Lower value isNote:applied.

In case the captive electricity generation system
7

JCM_VN_F_PM_ver01.0

meets all of the following conditions, the value in[Captive electricity withthe following table may be applied to EFelec

diesel fuel]depending on the consumed fuel type.

CDM approved small scale
methodology: AMS-I.A.

The system is non-renewable generation
system[Captive electricity withElectricity generation capacity of the systemnatural gas]is less than or equal to 15 MW

2006 IPCC Guidelines onNational GHG Inventories

Dieselfuel type

fuelEFelec

Natural gas

0.8 *10.46 *2

for the source of EF ofnatural gas.
CDM Methodological tool
"Determining the baseline*1 The most recent value at the time of validation
is applied.
*2 The value is calculated with the equation in
the option a) above. The lower value of default
effective CO2 emission factor for natural gas

efficiency of thermal orelectric energy generation
systems version02.0" for thedefault efficiency for off-grid
power plants.

(0.0543 tCO2/GJ), and the most efficient value ofdefault efficiency for off-grid gas turbine systems(42%) are applied.
COPRE,i

COP of reference chiller i under the standardizing

Specifications of project

temperature conditions

chiller i prepared for thequotation or factory

The COP of the reference chiller i is selected

acceptance test data by

from the default COP value in the following tablemanufacturer.

in line with cooling capacity of the project chiller
i. (“x” in the table represents cooling capacity per

The default COP values areunit.)

derived from the result ofsurvey on COP of chillers

Coolingcapacity perunit (USRt)

300≤x<
450

450≤x<
550

550≤x<
825

825<x≤
1,500

COPRE,i

5.59

5.69

5.85

6.06

from manufacturers that havehigh market share. The
survey should prove the useof clear methodology. Thedefault COP values should be8JCM_VN_F_PM_ver01.0

revised if necessary from
*1 USRt = 12,000 BTU/hr = 3.52 kW

survey result which is
conducted by JC or project
participants.

COPPJ,iThe COP of project chiller i under the project Specifications
specific conditions.

ofproject

chiller i prepared for thequotation

oracceptance

test

factory
databymanufacturer
Tcooling−out,i Output cooling water temperature of project Specifications
chiller i set under the project specific conditions.

ofprojectchiller i prepared for thequotation

oracceptance

test

factory
databymanufacturer
Tchilled−out,i Output chilled water temperature of project Specifications
chiller i set under the project specific conditions.

project

chiller i prepared for thequotationor

acceptancetest

manufacturer

9offactory
databy