Abstract: A hydrogen gas production apparatus 1 includes: a vaporizer 5 configured to generate ammonia gas by heating liquid ammonia; a main thermal decomposition device 6 configured to decompose the ammonia gas generated in the vaporizer 5, into nitrogen gas and hydrogen gas, by heating the ammonia gas by causing a fuel gas to burn; a cooler 7 configured to cool a decomposition gas including the nitrogen gas and the hydrogen gas generated through the decomposition in the main thermal decomposition device 6; and a separator 8 configured to separate hydrogen gas from the decomposition gas having been cooled.

Abstract: A member covered with a hard coating according to the present invention has a hard coating which has excellent erosion resistance, a hardness (H) of 20 GPa or more as measured using a nano indenter and a ratio of the hardness (H) to a Young's modulus (E) (i.e., H/E) of 0.06 or more, and comprises Ti and/or Cr, Al and N, wherein the total amount of Ti and Cr relative to the total amount of elements other than non-metal elements in the coating is 0.1 to 0.6 inclusive in terms of atomic ratio and the amount of Al relative to the total amount of the elements other than the non-metal elements in the coating is 0.4 to 0.7 inclusive in terms of atomic ratio.

Abstract: A member covered with a hard coating according to the present invention has a hard coating which has excellent erosion resistance, a hardness (H) of 20 GPa or more as measured using a nano indenter and a ratio of the hardness (H) to a Young's modulus (E) (i.e., H/E) of 0.06 or more, and comprises Ti and/or Cr, Al and N, wherein the total amount of Ti and Cr relative to the total amount of elements other than non-metal elements in the coating is 0.1 to 0.6 inclusive in terms of atomic ratio and the amount of Al relative to the total amount of the elements other than the non-metal elements in the coating is 0.4 to 0.7 inclusive in terms of atomic ratio.

Abstract: Disclosed are an oil state monitoring method and an oil state monitoring device which monitor the state of degradation of oil used in machinery or equipment. In monitoring the oil state by the oil state monitoring method and by the oil state monitoring device, oil used in machinery or equipment is filtered when the degradation state of the aforementioned oil is to be monitored. By means of filtration, the oil content is removed from the filter which captured contaminants that were present in oil prior to filtration. Light is projected onto the filter from which oil was removed. The projected light detects the color components of the transmitted light which penetrated the aforementioned filter.

Abstract: Disclosed are an oil state monitoring method and an oil state monitoring device which monitor the state of degradation of oil used in machinery or equipment. In monitoring the oil state by the oil state monitoring method and by the oil state monitoring device, oil used in machinery or equipment is filtered when the degradation state of the aforementioned oil is to be monitored. By means of filtration, the oil content is removed from the filter which captured contaminants that were present in oil prior to filtration. Light is projected onto the filter from which oil was removed. The projected light detects the color components of the transmitted light which penetrated the aforementioned filter.

Abstract: A path (24) is formed in an intake tube (6), which supplies external air to a reciprocating engine (4). External air flowing from an inlet port to an outlet port of the path (24). A gaseous fuel path (26) is connected to the path (24) at an intermediate location thereof. A gaseous fuel, lighter than air, is supplied through the gaseous fuel path (26) into the path (24). A plurality of nets (8) are disposed in an area of the path (24) between the outlet port and the gaseous fuel path (26). The nets (28) are spaced along the length of the path (24) with the outer peripheral surface of each net (28) being in contact with the inner surface of the path (24).

Abstract: A path (24) is formed in an intake tube (6), which supplies external air to a reciprocating engine (4). External air flowing from an inlet port to an outlet port of the path (24). A gaseous fuel path (26) is connected to the path (24) at an intermediate location thereof. A gaseous fuel, lighter than air, is supplied through the gaseous fuel path (26) into the path (24). A plurality of nets (8) are disposed in an area of the path (24) between the outlet port and the gaseous fuel path (26). The nets (28) are spaced along the length of the path (24) with the outer peripheral surface of each net (28) being in contact with the inner surface of the path (24).

Abstract: A path (24) is formed in an intake tube (6), which supplies external air to a reciprocating engine (4). External air flowing from an inlet port to an outlet port of the path (24). A gaseous fuel path (26) is connected to the path (24) at an intermediate location thereof. A gaseous fuel, lighter than air, is supplied through the gaseous fuel path (26) into the path (24). A plurality of nets (8) are disposed in an area of the path (24) between the outlet port and the gaseous fuel path (26). The nets (28) are spaced along the length of the path (24) with the outer peripheral surface of each net (28) being in contact with the inner surface of the path (24).

Abstract: A path (24) is formed in an intake tube (6), which supplies external air to a reciprocating engine (4). External air flowing from an inlet port to an outlet port of the path (24). A gaseous fuel path (26) is connected to the path (24) at an intermediate location thereof. A gaseous fuel, lighter than air, is supplied through the gaseous fuel path (26) into the path (24). A plurality of nets (8) are disposed in an area of the path (24) between the outlet port and the gaseous fuel path (26). The nets (28) are spaced along the length of the path (24) with the outer peripheral surface of each net (28) being in contact with the inner surface of the path (24).