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Reports of MOEJ/GEC JCM Feasibility Study: FY2013

Title of Study JCM Feasibility Study
Improvement of thermal insulation and water cleaning/air purge at power plant
FYFY 2013
Main Implementing EntityKanden Plant Co., Inc.
Study PartnersThe Ulaanbaatar Third Power Plant Co., Ltd., Thermal Power Plant #4 Company, Mongolian Ministry of Energy, and Mongolian Ministry of Environment and Green Development
Location of Project/ActivityMongolia/ Ulaanbaatar
Category of Project/ActivityEnergy Efficiency Improvement
Study Report

Note:JCM Proposed Methodology, spreadsheet and PDD 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/ActivityIt is studied as feasibility study by surveying The Ulaanbaatar Third Power Plant Co., Ltd (hereinafter described as CHP-3) & Thermal Power Plant #4 Company (herein after described as CHP-4). Investigation for energy efficiency improvement by thermal diagnosis of existing thermal insulation materials in major facilities, energy efficiency improvement by condenser tube cleaning, feasibility of MRV, etc. are implemented then feasibility for project is studied.
JCM MethodologyEligibility CriteriaThermal insulation installation by "Overwrapping Insulation Method":
    Criterion 1: Project activity is a thermal insulation installation work to reduce radiation heat quantity from surfaces of existing heat/ power supply facilities of thermal power plants by “Overwrapping Insulation Method”.
    Criterion 2: Project activity is applicable to the objectives of existing heat/ power supply facilities.
    Criterion 3: Installation method for the project is carried out to avoid removal of existing thermal insulation materials (asbestos, etc.). Thermal insulation material used for the project does not contain asbestos.
    Criterion 4: Thermal insulation installation works are complied with the low on occupational safety and health.
    Criterion 5: Thermal i nsulation material used for the project is applicable to the temperature range between -40C and +650C.
    Criterion 6: Thermal conductivity of thermal insulation material used for the project is not more than the values given in the following table.
    Average temperature
    Thermal conductivity
    F
    C
    Btu・in/hr・ft2・F
    W/m・K
    75
    23.9
    0.14
    0.021
    100
    37.8
    0.15
    0.022
    200
    93.3
    0.16
    0.023
    300
    149
    0.18
    0.025
    400
    204
    0.20
    0.029
    500
    260
    0.22
    0.032
    600
    316
    0.25
    0.036
    700
    371
    0.30
    0.043
Condenser cleaning work by “Brush Inset Cleaning Method”:
    Criterion 1: Reference activity is implemented by discharging high pressure water in condenser tube cleaning during shutdown period of the turbine unit.
    Criterion 2:  Project activity is to improve efficiency of condenser tube cleaning work that is to inset a brush to every condenser tube then shove the brush by high pressure water using a cleaning gun.
    Criterion 3: Project participants show reliable and evidenced basis that water consumption (or drainage) of "Brush Inset Cleaning Method (project activity)" is reduced over 50% comparing with "Conventional Method (reference activity)" by one of following measures.
    - Preliminary demonstration activities of "Brush Inset Cleaning Method" at thermal power plants in Mongolia
    - Verified historical data at thermal power plants in Japan
Default ValuesThermal insulation installation by "Overwrapping Insulation Method":
    ▪ Boiler efficiency at the thermal power plant
      The most conservative value (boiler efficiency = 1.0)
    ▪ CO2 emissions factor of coal
      Default value of lignite described in “2006 IPCC Guidelines for National Greenhouse Gas Inventory” (0.101tCO2/GJ)
    ▪ Pump efficiencies for fire-fighting water pump and drainage pump
      The most conservative values (pump efficiency = 0.9)
    ▪ Three-phase induction motor efficiencies of fire-fighting water pump and drainage pump
      The most conservative value (motor efficiency = 1.0)
Condenser tube cleaning by "Brush Inset Cleaning Method":
    ▪ It is calculated from coal consumption per electricity unit
      supplied to the electricity grid at the thermal power plants (g/kWh) and default values of CO2 emissions factor of "Lignite" according to "2006 IPCC Guidelines for National Greenhouse Gas Inventory" (0.101tCO2/GJ)
Calculation of Reference EmissionsThermal insulation installation by "Overwrapping Insulation Method":
    Emissions reduction of radiation heat quantity is calculated as reduction of coal consumptions that corresponds to reduction of boiler fuel in this methodology. I Each of quantification for the 5 facilities except main steam pipe is independently executed because shapes, surface conditions, emissive conditions and environmental conditions of facilities are widely varied.
Condenser tube cleaning by "Brush Inset Cleaning Method":
    Reference emissions and project emissions are quantified as to measure water consumptions per condenser tube for “Brush Inset Cleaning Method” and “Conventional Cleaning Method” during shutdown period of turbine unit then to calculate additional electricity consumption for fire-fighting pump and drainage pump based on the water consumption using estimated formulae.
Monitoring MethodThermal insulation installation by "Overwrapping Insulation Method":
    1) Parameters to be monitored every monitoring period after thermal insulation installation:
    ▪ Insulation installation areas at every heat/ power supply facilities [m2]
    ▪ Total mass flow rate of superheated steam at outlet of main steam pipe after thermal insulation installation [103 ton/y]
    2) Parameters to be monitored only during the first monitoring period after thermal insulation installation. These parameters are defined as fixed values from second monitoring period:
    ▪ Yearly average enthalpy of superheated steam at inlet/ outlet of main steam pipe after thermal insulation installation [kJ/kg]
    ▪ Average surface temperature of each thermal insulation material installed on heat/ power supply facility in sampling measurement by infrared thermographic scanning [K]
    ▪ Average surface temperature of each planned part of heat/ power supply facilities before thermal insulation installation [K]
    ▪ Ambient temperature around each heat/ power supply facilities before thermal insulation installation [K]
    ▪ Emissivity in sampling measurement by infrared thermographic scanning before thermal insulation installation [fraction]
    3) Parameters to be monitored before thermal insulation installation. These parameters are defined as fixed values throughout monitoring period:
    ▪ Yearly average enthalpy of superheated steam at inlet/ outlet of main steam pipe before thermal insulation installation [kJ/kg]
    ▪ Average surface temperature of each thermal insulation material installed on heat/ power supply facility in sampling measurement by infrared thermographic scanning [K]
    ▪ Average surface temperature of each planned part of heat/ power supply facilities after thermal insulation installation [K]
    ▪ Ambient temperature around every heat/ power supply facilities after thermal insulation installation [K]
    ▪ Emissivity in sampling measurement by infrared thermographic scanning before thermal insulation installation [fraction]
Condenser cleaning by "Brush Inset Cleaning Method":
    1) Parameters to be monitored during every shutdown of turbine unit
    ▪ Number of times of condenser tube cleaning work of turbine i in the thermal power plant
    2) Parameters to be monitored during shutdown of turbine unit in the first monitoring period after the start of project
    ▪ Water consumption of fire-fighting water pump per tube per condenser tube cleaning work for turbine i during shutdown of turbine unit in the first monitoring period after the start of project
    3) Parameters to be monitored during shutdown of turbine unit
    ▪ Water consumption of fire-fighting water pump per tube per condenser tube cleaning work for turbine i during shutdown of turbine unit in the first monitoring period before the start of project
GHG Emission ReductionsTotal values during the years of 2016 through 2025 are as follows.
Reference
emissions
(estimated)
Project emissions (estimated)
Emissions reduction (estimated)
Thermal insulation installation
in CHP-3
N/A
N/A
22,600CO2e
Condenser tube Cleaning 
in CHP-3 & CHP-4
50tCO2e
20tCO2e
30tCO2e
Environmental ImpactsThe project activities are aimed for efficiency improvement in thermal power plants and give just benefit as reduction of atmospheric pollution to surrounding or remote area thus negative effects are not occurred. And facility improvement works give inconsiderable influence for environment such as scaffolding works in very limited areas in the thermal power plants thus preventive measures are not required.
Project Plan
  • Initial investment amount: 274 million Japanese Yen
    Overwrapping Insulation Method (ECO-AIM)180 Million Japanese Yen
    Brush Inset Cleaning (Rakuchin Gun Device) Method74 Million Japanese Yen
    Support Cost for MRV Activities20 Million Japanese Yen
  • Annual operation and maintenance amount: 7 million Japanese Yen
    (mainly consumables for “Brush Inset Cleaning Device (Rakuchin Gun Device) ” and support cost for MRV activities)
  • Start of local work: July 2015
  • Work duration (lead time): Approximately 8 months
  • Start of operation: April 2016
Promotion of Japanese Technologies● Thermal insulation installation by "Overwrapping Insulation Method":
    It is offered that thermal insulation installation by "Overwrapping Insulation Method (ECO-AIM)" is expected to apply to other thermal power plants, heat supply companies or common plants out of CHP-3 & CHP-4 by the chief of Mongolia Ministry of Energy.
● Condenser tube cleaning by "Brush Inset Cleaning Method":
    There are needs for introduction of "Brush Inset Cleaning (Rakuchin Gun Device) Method" in Erdenet & Darkhan thermal power plants in case it is verified that cleaning water (drainage) consumption by the method is reduced over 50% against the conventional tube cleaning method and foreign bodies in tubes are completely removed.
Sustainable Development in Host CountryImplementation of thermal insulation installation using a thermal insulation material, 10mm of Pyrogel XT, by "Overwrapping Insulation Method (ECO-AIM)" gives life extension effect to facilities. Persistent use of thermal power plant facilities keeping necessary capacity results saves additional social costs. Thus it contributes sustainable development of Mongolia.
Introduction of condenser tube cleaning by "Brush Inset Cleaning (Rakuchin Gun Device) Method" gives reduction of cleaning water consumption and pump power consumption and also substantial improvement for work environment for condenser tube cleaning.

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