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Joint Crediting Mechanism Approved Methodology KH_AM001“Installation of LED street lighting system with wireless network control”
A. Title of the methodology
Installation of LED street lighting system with wireless network control, Version 01.0

B. Terms and definitions
Terms

Definitions

Wireless network control

Operation of a network of equipment without any kind ofcables where data are exchanged through the use of radio
wave. It consists of nodes that collect information fromindividual equipment and gateways that act as the central
collecting points and communicate data with a widernetwork.

LED lamp

A lighting device utilizing light-emitting diode (LED), which
is a semiconductor device that emits visible light when an
electric current passes through it.

HID lamp

An electric discharge lamp in which the light-producing arc
is stabilized by wall temperature and the arc has a bulb wallloading in excess of 3 watts per square centimetre.
HID lamps include groups of lamps known as high pressure
mercury, metal halide and high pressure sodium lamps.
[Source: International Electrotechnical Vocabulary (IEV)
845-07-19]

Luminaire efficiency

Luminaire efficiency is the capacity of light flux per watt.

C. Summary of the methodology
ItemsGHGemission

measures

Summary
reduction The street lighting system that introduces LED lamps andlighting control devices with utilization of wireless network is
installed on streets to save electricity consumption.

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Calculation

ofreference Reference emissions are calculated as emissions fromemissions

consumption of grid electricity by lighting system utilizing HID
lamps for providing the same service level as in the project.

Calculationofproject Project emissions are calculated as the emissions fromemissions

consumption of grid electricity by LED street lighting systemwith wireless network control installed under the project.

Monitoring parameters

1. Total operating hours of project lighting system i during theperiod p (hrs/p)
2. Total amount of electricity consumed in the project lighting
system i during the period p (Wh/p)

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

The project installs LED street lighting system utilizing wireless network
control, which is connected to an electricity grid system.

Criterion 2

All lighting equipment in one lighting system has the same specifications.

Criterion 3

Wireless network technology enables controlling of the volume of lighting.

E. Emission Sources and GHG types
Reference emissions
Emission sources

GHG types

Grid electricity consumption by the HID street lighting system.

CO2

Project emissions
Emission sources

GHG types

Grid electricity consumption by the LED street lighting system with CO2
wireless network control.

F. Establishment and calculation of reference emissions
F.1. Establishment of reference emissions
Reference emissions are calculated on the basis of the rated power consumption of project street
lighting systems, ratio of luminaire efficiency of project/reference lighting, operating hours of2

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reference lighting systems and CO2 emission factor of the electricity systems to which thelighting systems are connected.
In order to ensure net emission reductions, a conservative default value is established forluminaire efficiency of reference lighting system taking into account the highest luminaire
efficiency out of high pressure sodium lamps used on major arterial roads of Japan.

F.2. Calculation of reference emissions
Reference emissions are calculated in line with the following equation. The operating hours are
assumed to be the same as the project.
ܴ‫ܧ‬௣ = ∑௜ ܲ௜ × ൫ࣁ௉௃,௜ ÷ ࣁோா ൯ × ܱܲ௜,௣ × ‫ܨܧ‬௚௥௜ௗ × 10ି଺
REp

Reference emissions during the period p (tCO2/p)

Pi

Rated power consumption of a lighting equipment used in the project(1)

lighting system i (W)ηPJ,iLuminaire efficiency of a lighting equipment used in the project lighting
system i (lm/W)

ηRE

Luminaire efficiency of the reference lighting system (lm/W)POi,pTotal operating hours of project lighting system i during the period p(hrs/p)

EFgridGrid emission factor of Cambodian grid (tCO2/MWh)i

Identification number of the lighting system

G. Calculation of project emissions
Project emissions are calculated in line with the following equation.
ܲ‫ܧ‬௣ = ∑௜ ܲ‫ܥܧ‬௜,௣ × ‫ܨܧ‬௚௥௜ௗ × 10ି଺PEp(2)

Project emissions during the period p (tCO2/p)3

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PECi,pTotal amount of electricity consumed in the project lighting system iduring the period p (Wh/p)

EFgridGrid emission factor of Cambodian grid (tCO2/MWh)

iIdentification number of the lighting system

H. Calculation of emissions reductions

ER p = RE p - PE p(3)ERpEmissions reduction 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
Pi

Description of data

SourceRated power consumption of a lighting Information by manufacturer
equipment used in the project lightingsystem i (W)ηPJ,iLuminaireefficiency ofa

lighting Information by manufacturer

equipment used in the project lighting
system i (lm/W).

ηRE

Luminaire efficiency of the reference The rated lamp efficiency islighting system (lm/W).

based on the specifications

A default value (62 lm/W) based on the of HPS NH220 and is
HPS lamp with the highest efficiency adjusted by the loss bymeeting

Japan's

highway

lighting equipment based on thestandards for major arterial roads (HPS evaluation by NH220's
NH220).

manufacturer and the power
factor based on Japan
Industrial Standard (JIS C8109).

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EFgridGrid emission factor of Cambodian grid

The most recent published(tCO2/MWh)value by the Ministry ofEnvironment of Cambodia
at the time of validation.

History of the document
Version01.0

Date
26 April 2016

Contents revised
JC2, Annex 7
Initial approval.

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