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Joint Crediting Mechanism Approved Methodology CR_AM003“Installation of Electric Heat Pump Type Water Heater for Hot Water Supply Systems”
A. Title of the methodology
Installation of Electric Heat Pump Type Water Heater for Hot Water Supply Systems, Version
1.0

B. Terms and definitions
Terms

Definitions

Electric heat pump type waterheater

Electric heat pump type water heater is a type of heatpumps for supplying hot water in a systemic manner in abuilding. Run by electricity, the electric heat pump in thismethodology is also equipped with power optimizationdevices (e.g. inverters) to minimize the electricity
consumption of compressors by adjusting heating energy
against the demand.

Supply water heater system

Supply water heater system consists of electric heat pump
type water heater and auxiliary boiler which compensates
the lack of heating energy by heating up the water flowing
from electric heat pump type water heater(s) as necessary.
It will intake water supply from tap water and/or well.

C. Summary of the methodology
Items
GHG

emissionmeasuresCalculation
emissions

Summary
reduction Reducing fossil fuel consumption with introducing (an)electric heat pump type water heater(s).

ofreference Calculated by the net supplied heating energy for hot watersupplied for utilization in the project building, efficiencies of
the reference equipment (boiler) and CO2 emission factor offuel.

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Calculationofproject Calculated based on the monitored electricity consumption byemissions

the electric heat pump type water heater(s) and its auxiliaryelectric equipment and fuel consumption by auxiliary boiler ifapplicable.

Monitoring parameters

・ Electricity consumed by the project electric heat pumptype water heater(s)・ Electricity consumed by auxiliary electric equipment of
the electric heat pump type water heater system (e.g.,water pumps)
・ Fuel consumption of project auxiliary boiler whereapplicable
・ Average water temperature flowing from tap water and/or
well to inlet of supply water heater system.
・ Average water temperature flowing from outlet of supply
water heater system to utilization side・ Quantity of water flowing from tap water and/or well toinlet of supply water heater system
・ Electricity imported from the grid, where applicable・ Operating time of captive electricity generator, whereapplicable・ The amount of fuel consumed and/or 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

A project introduces (an) electric heat pump type water heater(s) to supply hotwater utilized in a building. In case (an) project electric heat pump type waterheater(s) replaces existing equipment, the existing one is not (an) heat pump
type water heater(s).

Criterion 2

Ozone Depletion Potential (ODP) of the refrigerant used in project electricheat pump is zero.

Criterion 3

A plan for not releasing refrigerant used for the project electric heat pump
type water heater(s) is prepared.

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E. Emission Sources and GHG types
Reference emissions
Emission sources

GHG types

Fuel consumption by reference equipment (boiler)

CO2

Project emissions
Emission sources

GHG types

Electricity consumption by (an) electric heat pump type water

CO2

heater(s) and its auxiliary electric equipment
Fuel consumption by auxiliary boiler where applicable

CO2

F. Establishment and calculation of reference emissions
F.1. Establishment of reference emissions
Reference emissions are calculated from the net supplied quantity of heating energy by theproject electric heat pump type water heater(s) divided by the efficiency of reference boiler
and multiplied by the emission factor of the fuel.
Net quantity of heating energy supplied is calculated by water quantity supplied to/from thesupply water heater system and temperature difference between the hot water supplied fromthe supply water heater system and feed water supplied to that system and physical property
values of water (density and specific heat of water).
The net emission reductions are ensured by conservatively setting the efficiency of reference
boiler at 92% which is the highest efficiency for a new boiler available from CDM
methodological tool as default value.

F.2. Calculation of reference emissions

RE p = (QPJh , p / h REh ) ´ EF fuelWhereQPJh, p = å mPJ ,i , p ´ (Tave, out ,i , p - Tave,in , i , p ) ´C p ´r ´ 10-3i3

JCM_CR_AM003_ver01.0
Sectoral scope: 03REp

Reference emissions during the period p [tCO2/p]

QPJh,pQuantity of heating energy utilized by the project building during theperiod p [GJ/p]

ηREh

Efficiency of the reference boiler for heating energy generation [-]EFfuelCO2 emission factor for fuel [tCO2/GJ]

mPJ,i,pQuantity of water flowing from tap water and/or well to inlet of supply
water heater system i during the period p [m3 /p]

Tave,out,i,pAveraged water temperature flowing from outlet of supply water heatersystem i to utilization side during the period p [degree Celsius]

Tave,in,i,pAveraged water temperature flowing from tap water and/or well to inlet of
supply water heater system i during the period p [degree Celsius]

CpSpecific heat capacity of water [MJ/tonne- degree Celsius]* The specific heat of water at a standard temperature of 20 ° C is 4.186 M
J / (tonne · K)ρDensity of water [tonne /m3]
* The density of water at a standard temperature of 20 ° C is 0.99822
tonne /m3.

‘i’Identification number of the supply water heater system

G. Calculation of project emissions

PE p = ( å EC PJHP , j , p + å EC PJaux ,k , p ) ´ EFelec + å AC PJB ,l ´ EF fuel ´ NCV fueljkl

PEp

Project emissions during the period p [tCO2/p]

EFelecCO2 emission factor for consumed electricity [tCO2/MWh]

ECPJHP,j,pElectricity consumed by the project electric heat pump type water heater jof the supply water heater system i during the period p [MWh/p]

ECPJaux,k,pElectricity consumed by auxiliary electric equipment k of the supply water
heater system i during the period p (e.g., water pumps) [MWh/p]

ACPJB,l,pFuel consumption of auxiliary boiler l in the project during the period p (ifapplicable) [tonne/p]

EFfuelCO2 emission factor for fuel [tCO2/GJ]

NCVfuelNet calorific value for fuel [GJ/tonne]4

JCM_CR_AM003_ver01.0
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Identification number of the electric heat pump type water heater‘k’

Identification number of the auxiliary electric equipment of supply water
heater system (e.g., water pumps)‘l’Identification number of the auxiliary boiler

H. Calculation of emissions reductions
Emission reductions are calculated as below:

ER p = RE p - PE p
ERpEmission reductions during the period p [tCO2/p]

REpReference 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
ηREhDescription of data

SourceEfficiency of the reference boiler for heating energy

Default value in thegeneration

methodology (fromthe CDM

default value: 92%

methodological tool
"Determining thebaseline efficiency ofthermal or electricenergy generation
systems", ver. 2.0).

EFfuelCO2 emission factor for fuel [tCO2/GJ]

In the order ofNote:
In the case that there is auxiliary boiler(s) in theproject, CO2 emission factor for the fuel consumed by
the auxiliary boiler(s) in the project is applied.

preference:a) values provided by
the fuel supplier;b) measurement by5

JCM_CR_AM003_ver01.0
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the project
participants;c) regional or national
default values;d) IPCC default
values provided intable 1.4 of Ch.1 Vol.2of 2006 IPCC
Guidelines on
National GHG
Inventories. Lower
value is applied.
NCVfuelNet calorific value for fuel [GJ/tonne]

In the order ofNote:preference:In the case that there is auxiliary boiler(s) in thea) values provided byproject, Net calorific value for the fuel consumed by

the fuel supplier;the auxiliary boiler(s) in the project is applied.

b) measurement by

Otherwise Net calorific value of natural gas is applied. the project
participants;c) regional or national
default values;d) IPCC default
values provided intable 1.2 of Ch.1
Vol.2 of 2006 IPCC
Guidelines on
National GHGInventories. Upper
value is applied.
EFelecCO2 emission factor for consumed electricity.

[Grid Electricity]

When project (an) electric heat pump type water
heater(s) consumes only grid electricity or captive The most recent value
available at the timeelectricity, the project participant applies the CO2ofvalidation
isemission factor respectively.
applied and fixed forWhen project (an) electric heat pump type water the monitoring period
heater(s) may consume both grid electricity and thereafter. The data issourced
fromcaptive electricity, the project participant applies the6JCM_CR_AM003_ver01.0
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CO2 emission factor for grid and captive electricity “Factores de emisión
degasesefectoproportionately.
invernadero”, Instituto
Meteorológico
Proportion of captive electricity is derived from Nacional
unlessotherwise
instructed
dividing captive electricity generated by total
bytheJoint
electricity consumed at the project site. The totalCommittee.
electricity consumed is a summation of grid electricity
imported (‫ܫܧ‬௚௥௜ௗ,௣ ) and captive electricity generated [Captive electricity](‫୎୔ܩܧ‬,௣ )* during the monitoring period.
For the option a)* Captive electricity generated can be derived from Specification of themetering electricity generated or multiplying captivepower
generation
systemmonitored operating time (ℎ௚௘௡,௣ ) by rated capacity ofprovided
bythegenerator (ܴ‫ܥ‬௚௘௡ ).
manufacturer(ηelec[%]).
CO2 emission factorof the fossil fuel type
[CO2 emission factor]
used in the captive
For grid electricity: The most recent value available power
generationfrom the source stated in this table at the time of system(EFgen,fuel[tCO2/GJ])
validation
For captive electricity, it is determined based on thefollowing options:a) Calculated from its power generation efficiency(ηelec [%]) obtained from manufacturer’s specification
The power generation efficiency based on lower
heating value (LHV) of the captive power generation
system from the manufacturer’s specification isapplied;‫ܨܧ‬௘௟௘௖ = 3.6 ×

100× ‫ܨܧ‬௚௘௡,௙௨௘௟η௘௟௘௖b) Calculated from measured data
The power generation efficiency calculated frommonitored data of the amount of fuel input for powergeneration ( ‫ܥܨ‬௉௃,௣ ) and the amount of electricity

7For the option b)
Generatedandsupplied electricity by
the captive powergenerationsystem(EGPJ,p [MWh/p]).
Fuelamountconsumed by thecaptivepowergeneration
system(FCPJ,p[massorvolume/p]).
Net calorific value(NCVgen,fuel [GJ/massor volume]) and CO2
emission factor of thefuel(EFgen,fuel[tCO2/GJ]) in order ofpreference:1) values provided by
the fuel supplier;JCM_CR_AM003_ver01.0
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generated (‫ܩܧ‬௉௃,௣ ) during the monitoring period p is 2) measurement by
theprojectapplied. The measurement is conducted with theparticipants;monitoring equipment to which calibration certificate 3) regional or national
is issued by an entity accredited under default values;
4)
IPCC
default
national/international standards;‫ܨܧ‬௘௟௘௖ = ‫ܥܨ‬௉௃,௣ × ܰ‫ܸܥ‬௚௘௡,௙௨௘௟ × ‫ܨܧ‬௚௘௡,௙௨௘௟ ×

Where:1‫ܩܧ‬௉௃,௣

valuesprovided

intables 1.2 and 1.4 of
Ch.1 Vol.2 of 2006ܰ‫ܸܥ‬௚௘௡,௙௨௘௟ : Net calorific value of consumed fuel IPCC Guidelines onNational
GHG[GJ/mass or volume]
Inventories.

Lower

value is applied.

Note:
In case the captive electricity generation system meets
all of the following conditions, the value in the[Captive electricity

following table may be applied to EFୣ୪ୣୡ depending

with diesel fuel]The system is non-renewable generation system

AMS-I.A.

Electricity generation capacity of the system ison the consumed fuel type.

CDM approved small
scale methodology:[Captive electricity

less than or equal to 15 MWwith natural gas]fuel typeEFୣ୪ୣୡ

Dieselfuel

Natural gas

0.8 *10.46 *2

2006 IPCC Guidelines
on National GHG
Inventories for thesource of EF of*1 The most recent value at the time of validation isnatural gas.

applied.

CDM Methodological*2 The value is calculated with the equation in thetool "Determining theoption a) above. The lower value of default effective

baseline efficiency of

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

thermalor

and the most efficient value of default efficiency forenergygeneration

off-grid gas turbine systems (42%) are applied.

systems version02.0"
fortheelectricdefault

efficiency for off-grid
power plants.
Cp

Specific heat capacity of water
4.186MJ/tonne-degree Celsius in case of standard

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water temperature of 20 ° C
ρDensity of water
998.22 kg /m3 in case of standard water temperature of
20 ° C

History of the document
Version01.0

Date
12 March 2018

Contents revisedElectronic decision by the Joint Committee
Initial approval.

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