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Reports of MRV Demonstration Studies: FY2012

Title of Study MRV Demonstration Study using a model project
Waste Heat Recovery System with Cogeneration
FYFY 2012
Main Implementing EntitySmart Energy Co., Ltd.
Study PartnersDistrict Cooling System and Power Plant Co., Ltd. (DCAP)
Location of Project/ActivityThailand (Bangkok)
Category of Project/ActivityWaste Heat Utilisation
Study Report

Note: Preliminary drafts of MRV 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/BOCM.
Description of Project/ActivityDCAP plant is providing electricity, chilled water to Bangkok Suvanabhumi International Airport and its adjacent facilities by utilizing waste heat from gas turbine and steam absorption chillers to reduce CO2 emissions. The plant generates an electricity from gas-turbine and high-temperature waste heat from gas turbine utilized to steam turbine for generating an electricity. Residual steam used to generate chilled water with absorption chillers.
Eligibility Criteria
  1. This methodology is applicable for the project using waste heat, discharge to the atmosphere following its primary usage in absence of the project activity. (Common to all calculation methods)
  2. Electric chillers replaced with this project shall be without malfunction. After the project implementation the electric chillers are either to be disposed, used for chilled water’s demand control and or used for back-up purposes. (Renovation project with calculation method 1, 2, 3 & 4)
  3. Absorption shall use steam and has a better performance than double-effect. (Common to all calculation methods)
  4. Heat source shall use either gas-turbine or gas-engine. (Common to all calculation methods)
  5. If the project uses ex-ante chiller's operational record to derive PCF, the record shall be furnished longer than 3 months. (Renovation project with methods 1 & 2)
  6. The project shall identify rated electricity consumption of gas turbine and/or waste heat recovery steam turbine. (Renovation project with method 2 & 4)
  7. The project shall continuously record and monitor production amount of chilled water, and chilled water's inlet/outlet temperature. (Common to all calculation methods)
  8. Project's emission factor for electricity shall be smaller than grid electricity’s emission factor. (Renovation project with all methods)
  9. Project's emission factors for heat and electricity shall be smaller than grid electricity’s emission factor. (Greenfield project)
  10. Absorption chiller shall be inspected periodically by vendor or equivalent. (Common to all methods)
Reference Scenario and Project/Activity BoundaryReference scenario for renovation project is to supply chilled water with an electric chillers powered by grid-electricity. For green-field project an electric-chillers powered by gas-turbine/gas-engine to supply electricity and chilled water. Project’s boundary includes gas-turbine, waste-heat recovery steam turbine and chillers but excludes demand side cooling facilities.
Calculation Method OptionsCalculation method should be chosen by either the project is greenfield or renovation project. For renovation project, the option split by either the project has a historical operation record of electric chiller, and further split whether direct measurement of replaced equipments would be performed. Greenfield project does not have any option. In total, 5 calculation options are available.
Default Values set in MethodologyFor renovation project without data of rated capacity of electric chillers, PCF shall be determined as 0.504kWh/USRT or COP 7.00 as a default value. The value is 20% higher than the Ministry of Energy of Thailand's minimum COP standard in 2009, 0.620kWh/USRT. The value is also 7% higher than the representing value of an actual installation in/around 2010 by considering project's additionality to BAU cases. For green-field project, a default value of system efficiency is set at 51.9% which are derived from Thailand's Small Power Producer's average energy efficiency in cogeneration facility including chilled water production.
Monitoring MethodContinuous hourly monitoring is performed for key parameters which includes, production amount of chilled water, average temperature of inlet and outlet of chilled water. Amount of power generation, amount of electricity sold to the grid, amount of gas consumption are measured automatically, and then accumulated with monthly basis by DCS. (Common to all calculation options) Amount of electricity consumptions of gas turbine and a waste heat recovery steam turbine shall be recorded monthly and measured value are accumulated monthly
Result of Monitoring ActivityThe study conducted monitoring for 6 chillers (4 Absorption, 2 Electric) among 17 (11 and 6 respectively) chillers of DCAP. The study made a further analysis on DCAP’s operational record in September 2012 and prepared as a monitoring record for verification by third party. Hourly data is recorded and accumulated monthly basis. Amount of power generation, amount of electricity sold to the grid, and amount of gas consumption are measured automatically and accumulated with monthly basis. Amount of electricity consumption of gas turbine and a waste heat recovery steam turbine are recorded hourly and accumulated monthly basis.
GHG Emissions and its ReductionsAnnual GHG emission amount is estimated to be 371,873tCO2, based on the monitoring data for the 6 chillers. GHG emission reduction amount is 55,886tCO2 with an option 1 of methodology while 47,364tCO2 with an option 4.
Method and Result of VerificationBureau Veritas Thailand (BVT) is appointed as a verifier and performed monitoring data verification. Throughout this study, BVT commented that BOCM/JCM needs to define it's own assurance level and to develop document templates to make verification effectively and efficiently. BOCM/JCM also needs to clarify project's additionality and eligibility conditions to claim its credit's legitimacy in contrast to CDM.
Environmental ImpactsThe DCAP facility has been operating as a vital utility supply facility of Suvanmabhum airport since its commission.. The facility meets relevant Thailand's environmental standards in operation. Adjacent land area is left for future expansion of the airport. Taking these things considered, the facility has minimum environmental impacts.
Promotion of Japanese TechnologyAbsorption chillers and gas turbine with waste heat recovery facility should be packaged in order to introduce to market, The package could be attractive to utility supplier particularly which locate along side of gas pipeline developed by PTT in/around.
Sustainable Development in Host CountryTo harmonize economic development with emission reductions and energy efficiency is one of the targets in the 5-year national policy of Thailand. This type of project could contribute to reduction of GHG emissions through energy efficient utility supply to the major industrial/commercial buildings which are developed in economic growth in Thailand.

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