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Reports of MOEJ/GEC JCM Feasibility Study: FY2013

Title of Study JCM Feasibility Study
Energy saving glass windows for buildings
FYFY 2013
Main Implementing EntityAsahi Glass Co., Ltd.
Study PartnersMONRE,MOIT,MOC, FIA, ECC Ho chi Minh, ECC Hanoi and VGA
Location of Project/ActivityHo Chi Minh City and Hanoi, Vietnam
Category of Project/ActivityEnergy Efficiency Improvement
Study Report

Note: JCM proposed methodology, and calculation sheet are the result of the study. They have neither been officially approved, nor are guaranteed to be officially approved under the JCM.
Description of Project/ActivityThe proposed JCM FS aim to improve air conditioning load of buildings by installing Energy saving glass windows to new buildings and stock buildings in Vietnam. One of key technologies is double glazing window with low emissive special metal film.
JCM MethodologyEligibility Criteria
  1. A type of energy-saving glass as listed below is introduced through the project implementation.
    [Essential technology] Low-e Pair Glass, High performance heat ray reflecting multi-layered glass, Heat ray reflecting multi-layered glass, Heat ray absorbing multi-layered glass, Heat ray reflecting glass and Heat-ray absorbing glass.
  2. The applied building is an office building that meets the following condition.
    Newly built: buildings with less than 2,500㎡ in total floor area
    Renovated: buildings of all sizes
  3. The applied building has air conditioning equipment with cooling and heating operation.
  4. It is possible to obtain the amount of energy consumption of the air conditioning system and the lighting equipment after the project activity.
  5. The window area of the building that has applied energy-saving window glass can be verified with architectural diagram, etc.
Default Values
  • Electricity consumption per unit window area that is reduced by implementing energy-saving windows
    • Saved energy of the air conditioning system and the lighting equipment per unit window area is set as a default value for reference emissions calculation.
    • In obtaining a default value, a simulation tool “EnergyPlus” was used for calculation with settings of building models and operational conditions. In order to set a conservative default value, standard building models and operational conditions were set for the calculation.
  • CO2 emission factor of power (grid electricity)
    • Research on the emission factor in the same way as CDM and set as a default value
    • In obtaining this default value, the calculation method is assumed to be the same as the one for CDM and it is considered that the value does not have to be more conservative.
Calculation of Reference EmissionsTo be calculated based on monitored values and default values.
To be calculated based on project emissions(tCO2e/y), area of energy saving windows (㎡), Saved energy of the air conditioning system and and the lighting equipment per unit window area(kWh/㎡/y), CO2 emission factor of power (grid electricity) (tCO2/kWh)
Monitoring Method
  • Area of energy saving windows (㎡):to be calculated based on the building architectural diagram, etc.
  • Project electricity consumption of the air conditioning system and the lighting equipment (kWh/y): to be calculated based on electricity bills from the electric power company, etc.
GHG Emission Reductions
  • Reference emissions
    REy=PEy+μ*α*EFelectricity
    ReyReference emissions in year y (tCO2e/y)
    PEyProject emissions in year y (tCO2e/y)
    ΜArea of energy saving windows (㎡)
    ΑSaved energy of the air conditioning system and the and the lighting equipment in the building with energy saving windows per unit window area(kWh/㎡/y)
    EFelectricityGHG emission factor of power (tCO2/kWh)
    * Further notes: two variations of α are to be set based on the Köppen climate classification; humid moderate climate with dry winter (CW) for Hanoi and tropical savanna climate (Aw) for Ho Chi Minh.
    In this methodology, the following values are to be used.
ParameterValueUnitExplanation
(Hanoi)339Monitored value from architectural diagrams of the targeted building
(Ho Chi Minh)350Monitored value from architectural diagrams of the targeted building
(Hanoi)56.2kWh/㎡/yDefault value by simulation
(Ho Chi Minh)100.1kWh/㎡/yDefault value by simulation
EFelectricity0.5408t-CO2/MWhData published by Ministry of Natural Resources and Environment (2011)
  • Project emissions
    Project emissions are calculated on the basis of monitored electricity consumption of the air conditioning system and the lighting equipment in the building.
    PEy=PECy*EFelectricity
    PECyProject electricity consumption (kWh/y)
    EFelectricityGHG emission factor of power (tCO2/kWh)
    ParameterValueUnitExplanation
    ECy(Hanoi)77,697kWh/yCalculated based on a simulation model
    ECy (Ho Chi Minh)112,115kWh/yCalculated based on a simulation model
    EFelectricity0.5408t-CO2/MWhData published by Ministry of Natural Resources and Environment (2011)
  • CO2 Emission reductions
    Result of the calculation, emission reductions in the office building in Hanoi became 10.30t-CO2 / year, and emission reductions in the office building in Ho Chi Minh became 18.95t-CO2 / year.
    ERy=REy – PEy
    ERyEmission reduction in year y (tCO2e/y)
    REyReference emissions in year y (tCO2e/y)
    PEyProject emission in year y (tCO2e/y)
ParameterValueUnitExplanation
ERy(Hanoi)
10.30
t-CO2/yThe formula is as described above
ERy (Ho Chi Minh)
18.95
t-CO2/yThe formula is as described above
REy(Hanoi)
52.32
t-CO2/yThe formula is as described above
REy (Ho Chi Minh)
79.58
t-CO2/yThe formula is as described above
PEy(Hanoi)
42.02
t-CO2/yThe formula is as described above
PEy (Ho Chi Minh)
60.63
t-CO2/yThe formula is as described above
Environmental ImpactsProject activities pose no specific concerns related to new environmental impact.
Project PlanGiven below is a construction timetable for the Hanoi Energy Conservation Training Center.
1) Start of land reclamation: 2013
2) Building construction: 2013-June 2015
3) Construction of building interior: June 2015-June 2016
Promotion of Japanese TechnologiesCurrent glass manufacturers in Vietnam are unable to produce energy-saving glass meeting the requirements of these regulations (mainly double-glazed low-E glass). For this reason, conceivable contributions to the host country include technical support for local manufacturers.
Sustainable Development in Host CountryThe adoption of energy-saving glass hinges on efforts to promote awareness in the host country. Potential ways to do this include seminars, trade shows, and other events. To install energy saving glass will save energy and mitigate the tight energy condition. It will contribute to realize sustainable development in host country.

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