Abstract: A method and apparatus are provided for controlling combustion in a pilot ignition gas engine connected to an electric generator of a power generator unit installed near a coal mine. The engine utilizes recovered methane gas and ventilation air methane gas from the coal mine by adjusting methane concentration to produce a lean air-methane gas mixture. Gas engine output torque is controlled to maintain |?Td|?|?Ts|>0, where |?Td| is the absolute value of change rate of load torque Td required to drive the generator in relation to engine rotation speed, and |?Ts| is the absolute value of change rate of output torque Ts in relation to engine rotation speed at an intersection of torque curves. Excess air ratio is controlled to be 2 or larger so that lean mixture burning is performed while avoiding misfiring and knocking by controlling the mixing ratio of recovered methane gas with ventilation air methane.

Abstract: A gas engine electric power generating system in which an electric power generating apparatus including an electric power generator connected with a gas engine of a pilot fuel oil ignition type is installed near a coal mine. Recovered methane gas and ventilated methane gas from the mine are introduced into a cylinder of the gas engine while being adjusted to be introduced as a lean methane/air mixture to operate the engine to produce electric power. A carbon dioxide emission credit reflecting the difference in greenhouse effect index between releasing coal mine methane gas to the atmosphere and releasing the methane gas to the atmosphere as carbon dioxide, is registered on an emission credit market. Also included are the affiliated systems of mutual patronage relation constituted by one or a plurality of the systems and nearby power generating system or systems using coal bed methane or pre-mining gas as fuel.

Abstract: A gas engine electric power generating system in which an electric power generating apparatus including an electric power generator connected with a gas engine of a pilot fuel oil ignition type is installed near a coal mine. Recovered methane gas and ventilated methane gas from the mine are introduced into a cylinder of the gas engine while being adjusted to be introduced as a lean methane/air mixture to operate the engine to produce electric power. A carbon dioxide emission credit reflecting the difference in greenhouse effect index between releasing coal mine methane gas to the atmosphere and releasing the methane gas to the atmosphere as carbon dioxide, is registered on an emission credit market. Also included are the affiliated systems of mutual patronage relation constituted by one or a plurality of the systems and nearby power generating system or systems using coal bed methane or pre-mining gas as fuel.

Abstract: A method and apparatus for controlling combustion in a gas engine connected to an electric generator to compose a power generator unit, the unit being installed near a coal mine site, the gas engine being of a pilot ignition type gas engine which can utilize recovered methane gas and ventilation air methane gas taken out from the coal mine as its fuel by adjusting methane concentration to produce lean air-methane gas mixture are provided.

Abstract: A gas engine electric power generating system in which an electric power generating apparatus including an electric power generator connected with a gas engine of a pilot fuel oil ignition type is installed near a coal mine. Recovered methane gas and ventilated methane gas from the mine are introduced into a cylinder of the gas engine while being adjusted to be introduced as a lean methane/air mixture to operate the engine to produce electric power. A carbon dioxide emission credit reflecting the difference in greenhouse effect index between releasing coal mine methane gas to the atmosphere and releasing the methane gas to the atmosphere as carbon dioxide, is registered on an emission credit market. Also included are the affiliated systems of mutual patronage relation constituted by one or a plurality of the systems and nearby power generating system or systems using coal bed methane or pre-mining gas as fuel.

Abstract: Disclosed is a design aiding computer program which obtains an algebraic expression of an equation with an unknown function, visualizes a partial space (“reasonable area”) in which a boundary condition or so is permitted, and acquires a point in the reasonable area which minimizes an approximate error as a solution of the equation.

Abstract: The object of the present invention is to provide a masking member which has good heat resistance and can be used repeatedly. To attain this object, the present invention provide a masking member made of a polymer alloy including one or more kinds of engineering plastics selected from a group consisting of methylpentene copolymer, polysulphone, polyethersulphone, polyphenylene, sulphide, polyphenylene ether, polyamideimide, polyetherimide, polyether-etherketone; and polyamide and/or polystyrene, and styrenic thermoplastic elastomer wherein said engineering plastics and said polyamide and/or polystyrene are mixed together in a weight ratio between 30:70 to 70:30, and 2 to 20 parts by weight of said styrenic thermoplastic elastomer is added in 100 parts by weight of said engineering plastics and polyamide and/or polystyrene. Said masking member has excellent moldability, a high level of mechanical strength and a good affinity with the coating film.

Abstract: The object of the present invention is to provide a highly fire resistant fiber sheet and a molded fiber sheet thereof. The fibers of the fire resistant sheet of the present invention contain expandable graphite. When said expandable graphite is exposed to high temperatures, it will expand, giving self-extinguishing properties to said fiber sheet. Since said fire resistant molded fiber sheet is highly fire resistant and nontoxic to humans and animals, it is useful for car or building interiors, and the like.

Abstract: The object of the present invention is to provide a masking member to protect a prescribed part of an article from coating, wherein said masking member has excellent heat resistance and moldability. As for the materials comprising said masking member (11,21,31,41,51), a polymer alloy, containing an engineering plastic, a polyamide, and a compatibilizer is used. In said polymer alloy, the weight ratio of said engineering plastic to said polyamide is set to be in the range of between 20:80 and 80:20, with said compatibilizer being added in an amount of between 0.

Abstract: A bondable sheet used as laminating material, and a laminated material using said bondable sheet are provided in the present invention. Said laminated/laminating material may be used for automobile interiors and the like. Said bondable sheet comprises a porous sheet into which a synthetic resin is impregnated and a thermosetting resin powder put on the surface of said porous sheet, and said laminated sheet comprises said bondable sheet and at least another sheet member, such as a core member or surface member, laminated together.

Abstract: The object of the present invention is to manufacture a masking member having a complex shape and being highly accurate. To attain said object, the present invention provides a masking member made of a modified polypropylene in which 5 to 30% by weight of polyethylene and/or ethylene-propylene copolymer is mixed in with polypropylene. In a case where polyethylene and/or ethylene-propylene copolymer is mixed in with polypropylene, the elongation of said polypropylene improves, also improving its moldability.

Abstract: The object of the present invention is to provide an engineering plastic cardboard having excellent heat resistance. Said engineering plastic cardboard (1) consists of a core member (2), and covering member(s) (3) covering one or both side(s) of said core member (2), wherein at least said core member (2) is made of an engineering plastic such as polyphenylene ether, or the like, or a polymer alloy of said engineering plastic and thermoplastic resin such as polypropylene, or the like, or a polymer alloy of said engineering plastic, thermoplastic resin, and a rubber-like material.

Abstract: The object of the present invention is to provide a masking member which does not contract or deform while being used with heat. In order to attain the object of the present invention, a method for the manufacturing of a thermoplastic resin masking member is provided, in which a thermoplastic resin sheet is first stretch-molded making a green masking member, the green masking member then being heat-treated at a temperature above the thermoplastic resin sheet's softening point, to achieve a size and shape suitable for the part to be masked. Under heat treatment, residual stress residing in the molded article is reduced, so that its construction and deformation is eliminated in the next heating step.

Abstract: The object of the present invention is to make the boundary between a coated part and uncoated part a straight line in a case where said uncoated part is protected by a masking member during coating. To attain this object, the present invention provides a masking member (11) consisting of a panel (11A) of a foamed polystyrene having an expansion ratio in the range of between 5 and 100 times, wherein grooves (12) are formed at set positions on one side or either side of said panel (11A), dividing it into a plural number of unit blocks, said masking member consisting of one or more of said unit block(s) is snapped from said panel (11A) through said groove(s) (12), the edge of said masking member along the snapping line being substantially straight.

Abstract: The gas engine electric power generating system in which the electric power generating apparatus composed of an electric power generator connected with a gas engine of a pilot fuel oil ignition type is installed near a coal mine and the recovered methane gas and ventilated methane gas taken out of the mine shaft are introduced into the cylinder of the gas engine while being adjusted to be introduced as a lean methane/air mixture to operate the engine to produce electric power, is established near coal mine in developing country including China, the carbon dioxide emission credit produced by the difference in greenhouse effect index between the case where coal mine methane gas is released to the atmosphere and where said methane gas is utilized by the gas engine electric power generating system to be released to the atmosphere as carbon dioxide, is registered on a emission credit market to be traded with credit surcharge payment obligators(or those who want to purchase the emission credit).

Abstract: The object of the present invention is to provide a masking member which has good heat resistance and can be used repeatedly. To attain this object, the present invention provide a masking member made of a polymer alloy including one or more kinds of engineering plastics selected from a group consisting of methylpentene copolymer, polysulphone, polyethersulphone, polyphenylene, sulphide, polyphenylene ether, polyamideimide, polyetherimide, polyether-etherketone; and polyamide and/or polystyrene, and styrenic thermoplastic elastomer wherein said engineering plastics and said polyamide and/or polystyrene are mixed together in a weight ratio between 30:70 to 70:30, and 2 to 20 parts by weight of said styrenic thermoplastic elastomer is added in 100 parts by weight of said engineering plastics and polyamide and/or polystyrene. Said masking member has excellent moldability, a high level of mechanical strength and a good affinity with the coating film.

Abstract: The object of the invention is to provide an operating method of an internal combustion engine with critical water injection, in which the advantage of critical water is positively utilized to increase engine efficiency and output in addition to the reduction of the emission of nitrogen oxide and CO. It is characterized in that sub- or super-critical water of above 250° C. and above 10 MPa is injected during the compression or combustion stroke of the internal combustion engine by starting the injection before the fuel ignites in the compression stroke, particularly the injection is done so that said critical water interferes with the fuel spray injected into the combustion chamber, and the injection period is in the range of −90° C.˜+30° C. from the top dead center crank position.

Abstract: The present invention provide a feedback combined system of a reciprocating internal combustion engine, in which, in order to increase output and thermal efficiency by increasing fuel supply without increasing the maximum combustion temperature than the conventional level and concurrently reduce emissions such as NOx, a heat exchanger is provided downstream the exhaust turbine connected to the exhaust collector, sub-critical water of pressure of between 18 MPa and 22.1 MPa (critical pressure) and temperature of between 250° C. and 580° C. or super-critical water is generated by the heat exchange of water supplied to the heat exchanger with the exhaust gas, said sub- or super-critical water is injected into the cylinder in the range of 90° before the top dead center and 30° after the top dead center and fuel is injected so that the air excess ratio at the maximum output is 1˜2.5 and the maximum combustion temperature is 1600˜2000° C.

Abstract: In a multi-cylinder reciprocating internal combustion engine, an optimal angle of crank arrangement that reduces vibrating force caused in the engine is obtained.

Abstract: A masking member is provided that can be used repeatedly even for surface treatments at a high temperature. The masking member includes a plastic produced by polymerization using a metallocene compound as a catalyst or a polymer alloy containing such a plastic.