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Joint Crediting Mechanism Approved Methodology ID_AM014“Installation of Tribrid Systems to mobile communication’s Base Transceiver Stations”
A. Title of the methodology
Installation of Tribrid Systems to mobile communication’s Base Transceiver Stations Ver 01.0

B. Terms and definitions
Terms

Definitions

Base Transceiver Station (BTS)

A facility equipped with antenna and other communicationequipment for sending and receiving radio signals to mobile
devices and converting them to digital signals. A typical BTS
in Indonesia comprises of a transceiver, rectifier, diesel
generator, and a lead-acid battery as a standby power supply
to prevent momentary and/or temporary power failure.

Tribrid System

Tribrid System is a combined system of solar PV, batteries,and electric power control system. Tribrid System controls
charge-discharge of battery, and improves the operational
efficiency of diesel generators with its electric power controlsystem. As a result, it reduces consumption of grid electricity
and/or captive electricity.

C. Summary of the methodology
Items
GHG

emissionmeasures

Summary
reduction By installation of Tribrid system(s) to mobile communication’s
Base Transceiver Stations, the project achieves energy saving
through displacement of grid and/or captive electricity by solar
power, and optimization of the efficiency of diesel generator
reducing its total operation time.

Calculationemissions

ofreference Reference emissions are calculated on the basis of monitored
electricity consumption at the project BTS. The reference gridelectricity and/or diesel consumption are calculated based on

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hours for which electricity is available from grid, and efficiency
of diesel generator. Then, emissions from grid electricity and/ordiesel consumption are calculated multiplying by CO2 emission
factor of grid electricity and/or diesel.
Calculation

ofproject Project emissions are calculated on the basis of monitored gridemissions

electricity consumption and/or diesel consumption at the project
BTS after implementation of the project, and CO2 emission
factor of grid electricity and/or diesel.

Monitoring parameters-The amount of grid electricity consumed at BTSi
-The quantity of diesel consumed at BTSi
-The amount of electricity generated by the project diesel
generator at BTSi
-The amount of electricity generated by the project solar PVsystems at BTSi
-Hours for which electricity is available from grid at BTSi
-Hours of operation of BTSi

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

The project installs Tribrid system(s) to new and/or existing BTS.

Criterion 2

The project BTS is located at the telecom tower sites equipped with diesel
generator.

Criterion 3

The PV modules have obtained a certification of design qualifications (IEC61215, IEC 61646, or IEC62108), and safety qualification (IEC 61730-1, andIEC 61730-2) at the time of validation based on the latest version ofinternational or national standard.

Criterion 4

The battery installed by the project is Li-ion battery.

Criterion 5

In the case of replacing existing Lead-Acid battery with the project Li-ionbattery, lead contained in existing Lead-Acid battery is not released to theenvironment.

E. Emission Sources and GHG types
Reference emissions

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Emission sources

GHG types

Emissions from grid electricity and/or captive electricity

CO2

Project emissions
Emission sources

GHG types

Emissions from grid electricity and/or captive electricity

CO2

F. Establishment and calculation of reference emissions
F.1. Establishment of reference emissions
Reference emissions are calculated on the basis of monitored electricity consumption at theproject BTS. The reference grid electricity and/or diesel consumption that are calculated basedon hours for which electricity is available from grid, and efficiency of diesel generator. Then,emissions from grid electricity and/or diesel consumption are calculated multiplying by CO2emission factor of grid electricity and/or diesel.
Reference emissions are calculated using design efficiency of new diesel generator to beinstalled at the project BTS when it’s installed to the project BTS. If new diesel generator is notinstalled by the project, the design value of efficiency of the diesel generator operated at theproject BTS at the time of validation is applied for the calculation of reference emissions. If
more than one diesel generators are equipped at the project BTS, the most efficient value among
the design efficiency of the equipped diesel generators is adopted for the calculation of thereference emissions.
Ensuring net emission reductions
Net emission reductions are ensured by adopting a design efficiency of the project dieselgenerator. If a new diesel generator replaces the existing one, the design efficiency of the newdiesel generator is applied. It is also ensured by calculating fuel consumption by dieselgenerator based on the assumption that diesel generator operates steadily with design efficiency
in reference scenario although actual fuel consumption is used for the project scenario.
F.2. Calculation of reference emissionsܴ‫ܧ‬௣ = ෍ ቆ‫ܥܧ‬௜,௣ ×and௜߬௜,௣× ‫ܨܧ‬௚௥௜ௗ + ߮௜ × ൫ܶ௜,௣ − ߬௜,௣ ൯ × ߩௗ௜௘௦௘௟ × 10ି଺ × ܰ‫ܸܥ‬ௗ௜௘௦௘௟ × ‫ܨܧ‬ௗ௜௘௦௘௟ × 10ିଷ ቇܶ௜,௣‫ܥܧ‬௜,௣ = ‫ܥܧ‬௜,௚௥௜ௗ,௣ + ‫ܥܧ‬௜,ௗ௜௘௦௘௟,௣ + ‫ܥܧ‬௜,௦௢௟௔௥,௣Where3

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REp= Reference emissions during the period p (tCO2/p)ECi,p= Total electricity consumption at BTSi during the period p (MWh/p)‫ܥܧ‬௜,௚௥௜ௗ,௣‫ܥܧ‬௜,ௗ௜௘௦௘௟,௣‫ܥܧ‬௜,௦௢௟௔௥,௣ܶ௜,௣

=The amount of grid electricity consumed at BTSi during the period p(MWh/p)=The amount of electricity generated by the project diesel generator at BTSi
during the period p (MWh/p)=The amount of electricity generated by the project solar PV system at BTSi
during the period p (MWh/p)=

Hours for which electricity is available from grid at BTSi during the periodp (h/p)= Total hours of operation of BTSi during the period p (h/p)= Grid CO2 emission factor (tCO2/MWh)EFgrid=Design efficiency of diesel generator operated at the project BTS at thetime of validation at 25% load to be installed at BTSi (L/h)ߩௗ௜௘௦௘௟NCVdiesel= Net calorific value of diesel (TJ/Gg)

EFdiesel= Diesel CO2 emission factor (kgCO2/TJ)= Weighted average density of diesel (kg/L)

G. Calculation of project emissionsܲ‫ܧ‬௣ = ෍൫‫ܥܧ‬୧,୥୰୧ୢ,௣ × ‫ܨܧ‬௚௥௜ௗ + ‫ܥܨ‬௜,ௗ௜௘௦௘௟,௣ × ߩௗ௜௘௦௘௟ × 10ି଺ × ܰ‫ܸܥ‬ௗ௜௘௦௘௟ × ‫ܨܧ‬ௗ௜௘௦௘௟ × 10ିଷ ൯௜WherePEp=

ECi,grid,p=EFgrid=

Project emissions during the period p (tCO2/p)
The amount of grid electricity consumed at BTSi during the period p(MWh/p)
Grid CO2 emission factor (tCO2/MWh)

FCi,diesel,p =The quantity of diesel consumed at BTSi during the period p (L/p)ߩௗ௜௘௦௘௟=Weighted average density of diesel (kg/L)

NCVdiesel =Net calorific value of diesel (TJ/Gg)

EFdiesel=Diesel CO2 emission factor (kgCO2/TJ)

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H. Calculation of emissions reductions
ER ୮ = RE୮ − PE୮

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

Description of data

SourceDesign efficiency of diesel generator

Specification of generator.

operated at the project BTS at the time ofManufacturer’s data.

validation at 25% load to be installed at

If more than one diesel

BTSi (L/h)

generators are equipped at theIf new diesel generator is not installed byproject BTS, the most efficientthe project, the design value of the diesel

value among the design

generator operated at BTS at the time ofefficiency of the equipped

validation is applied for the calculation ofdiesel generators is adopted

reference emissions. The design efficiency

for the calculation of theof the diesel generator at 25% value isreference emissions.

applied.
As a load factor of diesel generator at BTS
site, 25% load which is set for mini-gridwith 24 hour services in CDM approved
small scale methodology AMS-I.F. isadopted. According to the AMS-I.F.,
mini-grid is defined as small-scale powersystem with a total capacity not exceeding
15MW. For diesel generator operation atBTS connected to unreliable grid withavailable electricity less than 24 hours,
adopting efficiency of diesel generator (L/h)

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at 25% load to ensure conservativeness.
EFgridGrid CO2 emission factor (tCO2/MWh)

The most recent value
available at the time ofvalidation is applied and fixed
for the monitoring period
thereafter. The data is sourced
from “Emission Factors ofElectricity InterconnectionSystems”, National
Committee on Clean
Development Mechanism
Indonesian DNA for CDM
unless otherwise instructed bythe Joint Committee.

ߩௗ௜௘௦௘௟Weighted average density of diesel (kg/L)a) Values provided by the fuelsupplier in invoices, orb) Regional or national default
value.

NCVdiesel

Net calorific value of diesel (TJ/Gg)

IPCC default values provided
in table 1.2 of Ch.1 Vol.2 of2006 IPCC Guidelines on
National GHG Inventories.
Lower value is applied.

EFdiesel

Diesel CO2 emission factor (kgCO2/TJ)

IPCC default values provided
in table 1.4 of Ch.1 Vol.2 of2006 IPCC Guidelines on
National GHG Inventories.
Lower value is applied.

History of the document
Version01.0

Date04 December 2017

Contents revised
JC7, Annex 4
Initial approval.

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