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Reports of MOEJ/GEC JCM Feasibility Study: FY2013

Title of Study JCM Feasibility Study
High-efficiency Rice Husk-based Cogeneration
FYFY 2013
Main Implementing EntityEJ Business Partners Co., Ltd.
Study PartnersPEAR Carbon Offset Initiative Ltd., and Grameen Shakti
Location of Project/ActivityBangladesh, Rajshahi Division
Category of Project/ActivityWaste, Biomass
Study Report

Note: BOCM 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 BOCM.
Description of Project/ActivityThis project aims to install cogeneration facility into rice mills in Bangladesh to replace low-efficient, rice husk fired steam boilers that are currently in use and improve resource saving by effective utilization of rice husks as a valuable biomass resource. In addition, rice husk ash can be produced and sold as silica products
BOCM MethodologyEligibility Criteria
  1. To introduce rice husk cogeneration systems (with optional silica production systems) with higher energy efficiency than existing biomass (rice husk) boilers without cogeneration used in rice mills.
  2. Steam generated by the project is used for parboiling and other purposes in the target rice mill. The electricity generated by the project, is used for the rice mill’s electricity demand and remained portion is sold to grid or other facilities in the vicinity of the rice mill.
  3. Rice husks are sourced from the rice mill and other rice mills. The biomass cogeneration plant is designed based on the available amount of rice husks to be provided by the rice mill and not designed to be co-fired by any fossil fuel.
  4. Diesel generators may be equipped for stand-by purpose for providing electricity to other facilities if any, only during scheduled or unscheduled shutdown of the biomass cogeneration plant.
  5. The turbine generator of cogeneration power plant should be the one which have operational track record higher than 90% of operational availability at least 3 years.
Default ValuesThe grid CO2 emission factor (0.66 tCO2/MWh) uses an official data published by the Department of Environment, Bangladesh. Net calorific value of diesel oil and CO2 emission factor of diesel oil use default values from IPCC guidelines. The CO2 emission factor of rice husk transportation activities adopts the default value from the CDM methodology AM0090.
Calculation of Reference EmissionsThe amount of emission associated with power consumption at the rice mill or plant being supplied electrical power by the project (excluding newly established silica production plants).
With business as usual (BaU) scenario defined as a continuation of the current state, the sharing of power consumption of the facility to be powered from this project between the project and BaU is valid.
Monitoring Method- Total electricity supplied by the project cogeneration plant (Continuous by elec meter)
- Electricity supplied by the project cogeneration plant to the silica plant (Continuous by elec meter)
- Amount of rice husks transported (once a month by the bill) and Road distance between rice husk sources and the site of cogeneration plant (for each action)
- Project diesel consumption for electricity generation (once a month by the bill)
GHG Emission Reductions- The total supply of electrical power from the cogeneration plant = 9,979MWh/y.
- The supply of electrical power from the cogeneration plant to the silica plant = 1,425MWh/y.
- Grid CO2 emission factor = 0.66 tCO2/MWh.
- CO2 emission factor of rice husk transport = 83gCO2/t.km
- Reference emission= (9,979-1,425) *0.66= 5,645tCO2/y.
- Emission amount associated with rice husk transportation = 3,300 t/y 10 km 83 10-6=3tCO2/y.
- The estimated emission reduction = 5,642tCO2/y.
Environmental ImpactsTo comply the all environmental standards on the process of environmental impact assessment.
Project PlanJCM Subsidiary upto 50%: P-IRR10.0%, E-IRR22.4%.
Promotion of Japanese TechnologiesThe Japanese steam turbine generator is competitive in terms of long-term operation and maintenance against other Asian manufacturers.
Sustainable Development in Host CountryCogeneration can contribute to achieve efficient use of valuable biomass resources, improvement of the parboiling process, power shortage, environmental, and safety issues.

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