Gas Engine Power Generation for CMM/VAM
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1 Gas Engine Power Generation for CMM/VAM Clean & High Efficiency Gas Engine Power Plant MACH-30G *** Stop the Green House Effect *** Utilization of Coalmine Gas
2 Road map for the presentation Introduction of MITSUBISHI MACH30G GAS ENGINE Utilization of with MACH30G GAS ENGINE
3 MACH-30G 18MACH-30G
4 M(Mitsubishi) A(Advanced Engine of) C(Clean &) H(High Efficiency)
5 Principal Particular Engine Type/ V-type 4cycle Gas Engine (Pilot Ignition with Pre-chamber) No. of Cylinder Cylinder Bore mm 300 Stroke mm 380 Speed rpm 720/750 (Frequency60/50Hz) Gen. Output *1 kw 3650/ / / / 5750 *1 when using Natural Gas or City Gas with Methane Number 65
6 Development of KU engine series 1985 KU30 KU30G (Spark Ignition) KU30A KU KU MARK-30B MACH-30G (Pilot Ignition)
7 KU SERIES SALES RECORD 2units 10MW Turkey IN THE WORLD 5units 20.5MW 1unit 7MW 1unit 4.4MW Cambodia Saudi Arabia Vietnam 2units 7.2MW South Korea 303units 1520MW Japan 1unit 5.6MW Portugal 1units 5.8MW Egypt 4units 19MW Taiwan 11units 82.9MW Senegal 1unit 5MW Sierra Leone 6units 25MW Philippines 2units 10MW Liberia 27units 152.6MW Pakistan 5units 25MW India 8units 41.3MW Indonesia 20units 91.1MW Thailand 2units 6.8MW Palau 1units 4.2MW Solomon Islands
8 EXAMPLE OF MITSUBISHI GAS ENGINE Client Nippon Steel Corporation District Engine Type Chiba, Japan 18MACH-30G Unit 10 Output 57,500kW Delivery 2003,3
9 EXAMPLE OF MITSUBISHI GAS ENGINE Client District Engine Type MHI Energy & Service Kanagawa, Japan 18MACH-30G Unit 2 Output 11,500kW Delivery 2002,10
10 Feature of MACH Gas Engine Lean burn (Base technology Pre-combustion chamber is equipped to main combustion chamber Low NOx emission Pilot ignition Fuel oil Pilot Ignition Valve is used for ignition source instead of Spark Plug Make a stable combustion & Low NOx emission Fuel Gas Supply System Fuel gas is supplied to each cylinder directly through the gas supply valves for them. Higher response against load change
11 Comparison of combustion between diesel engine and gas engine Fuel injection valve Diesel engine Pilot fuel injection valve or spark plug Lean burn gas engine Atomize Air Fuel-air mixture (gas+air) A/F Ratio
12 Comparison between conventional gas engine (spark ignition) and new design (pilot injection) Rich Mixture Gas Gas Lean Mixture Gas Spark plug 0.1J Unstable Combustion Increas e NOx Spark ignition Pilot oil Lean Mixture Gas Decrease NOx Pilot injection Lean Mixture Gas Injector 800J Stable Combustion
13 Present Situation of Coalmine Gas Methane Emission from world Coalmines 22.4 M ton/yr Same Green House Effect as CO 2 of 470 M ton/yr effect of CH 4 is 21 times as CO 2 回収メタン (30%-50%) Coalmine Methane Gas Coal seam 稼行炭層 炭層 炭層 炭鉱メタン放出図 Balling Hole ガス抜きボーリング孔 切羽 Working face Pump 真空ポンプ メタンガス漏出 通気立坑 Ventilation Hole Leakage of methane 通気排気 VAM : Ventilation Air (0.3%~0.7% メタン ) Methane 主扇 ( 通気ファン ) crack クラック
14 2005 (Actual result) 2010 (Target) Production 15 billion m billion m 3 Recovery 2.3 billion m 3 10 billion m 3 Utilization 1 billion m billion m 3 The source:the 11th Five-year Plan for Coal Mine Production Safety Utilization of CMM will lead good effect of not only [Reducing the exhaust energy] but also [Reducing CO2] CH 4 1ton=CO 2 21ton
15 SUBSATATION ELECTRIC POWER GAS ENGINE GENERATION PLANT GRID UTILITIES IN COAL MINE EXCESS ELECTRIC POWER CH4:30%~80% 30 CH4 50% SUBSATATION VENTILATION FAN VACUUME PUMP RECOVERY METHANE GAS HOLDER CONSUMER COAL BED BORING to PULL OUT GAS WORKING COAL BED WORKING FACE
16 Engine Type V-type 4cycle Gas Engine (Pilot Ignition with Pre-chamber) No. of Cylinder Cylinder Bore mm 300 Stroke mm 380 Speed rpm 750 (Frequency50Hz) Gen. Output *1 kw
17 GAS SUPPLY VALVE T/C * CMM MIXER SUB-GOVERNING MAIN GOVERNING GEN. MACH-30G A/C * CMM AIR MIXTURE CH4:Less than0.3vol.(%) INTAKE AIR SYSTEM GAS COMP. FILTER CMM SAFETY CONTROL Engine comb.chamber CMM AIR MIXTURE GAS HOLDER CMM( CH4 :30 50vol.(%)) HIGH OUTPUT SUPER LEAN BURN (CH4:4 5vol.( ))
18 Necessary to reduce Green House Gas further in future Utilization of VAM (Ventilation Air Methane) CMM Methane Turbo Charger VAM Methane % Engine comb.chamber Technical Problem Capability to burn Lean Mixture by mixing VAM MACH-30G has high potential because of technical advantage of Lean Burn
19 Problems with Conventional Engine Low Unstable Calorific Ignition due Value to Low Ign. Energy Solutions of MACH30G Pilot Ignition High Ignition Energy Large Variation of Methane % When mixing VAM Combustion Variation Abnormal Combustion Knock with rich Misfire with Lean Leaner Mixture Combustion Control Lean Burn Technology & Fuel Gas Direct Supply system to cylinder
20 We believe Mitsubishi MACH-30G Gas engine will contribute to stop the Green House Effect utilizing Coal Mine Gas Key Technology Lean Burn Technology Pilot Ignition Combustion Control Fuel Gas Direct Supply System to Cylinder Reducing Exhaust Energy CO2
21 MACH-30G 18MACH-30G Thank you
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