Provided is a methanol-fueled ship that can reduce the weight of a hull while maintaining the volume of a fuel tank. A methanol-fueled ship 1 comprises: a pair of partition wall steel plates 2 disposed so as to form a prescribed gap with respect to hull partition walls (bulkheads 17); a pair of side wall steel plates 3 disposed so as to form a prescribed gap with respect to hull side walls 18; demarcating steel plates 4 that demarcate, to the front and rear, a part of a longitudinal structures (top side 12a, hopper 12b, double bottom 12c, etc.) of the hull; and a top part steel plate 5 disposed so as to form a prescribed gap with respect to an upper deck 11. The methanol-fueled ship 1 uses an internal space, which is formed by the partition wall steel plates 2, the side wall steel plates 3, and the longitudinal structures (here, the top side 12a, the hopper 12b, and the double bottom 12c) as a fuel tank 20.
Provided are: an oil supply device for a marine contra-rotating propeller device; and a marine contra-rotating propeller device whereby it is possible to supply lubricating oil to a contra-rotating bearing by using a simple structure, reduce manufacturing costs, and suppress scattering of the lubricating oil. A marine contra-rotating propeller device 1 comprises an inner propeller shaft 2. The inner propeller shaft 2 is provided with a hollow portion 23 formed in the axial direction from the front end to a position adjacent to a gap 11 formed by a front-side contra-rotating seal device 51 and a front-side contra-rotating bearing 41, and a plurality of oil supply ports 24 formed so as to communicate the gap 11 and the hollow portion 23. The lubricating oil is supplied to a bearing system including a contra-rotating bearing 4 through the hollow portion 23 and the plurality of oil supply ports 24.
F16H 57/04 - Features relating to lubrication or cooling
B63H 5/10 - Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller of coaxial type, e.g. of counter-rotative type
B63H 23/34 - Propeller shaftsPaddle-wheel shaftsAttachment of propellers on shafts
F16N 7/38 - Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pumpCentral lubrication systems
F16N 11/08 - Arrangements for supplying grease from a stationary reservoir or the equivalent in or on the machine or member to be lubricatedGrease cups with mechanical drive, other than directly by springs or weights
Provided is a bulk carrier in which the space on the upper deck can be utilized for various purposes. A bulk carrier 1 comprises, as illustrated in Fig. 1, for example: a hold 2 that accommodates a bulk cargo; living quarters 3 installed on the upper deck 11; a deck crane 4 installed on the upper deck 11; and a funnel 5 that ejects exhaust gas. The bulk carrier 1 further includes a multi-purpose space 7 that is installed on the upper deck 11 between a hatch cover (fifth hatch cover 25a) of the hold 4 (fifth hold 25) and the living quarters 3, the multi-purpose space 7 being utilizable for multiple purposes.
Provided is an ammonia-fueled ship in which diffusion of leaked ammonia gas can be suppressed. An ammonia-fueled ship 1 includes an ammonia-fueled engine 4 that uses ammonia as fuel, a generator 5 that uses ammonia as fuel, and an engine room 9 in which the ammonia-fueled engine 4 and the generator 5 are installed. The engine room 9 has a plurality of areas partitioned on the basis of the risk of ammonia gas leakage. For example, the engine room 9 is partitioned into a first area 91 containing the generator 5 and a second area 92 containing the ammonia-fueled engine 4.
B63B 11/04 - Constructional features of bunkers or ballast tanks, e.g. with elastic walls
B63H 21/38 - Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
F02B 43/10 - Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
F02M 25/00 - Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
5.
AMMONIA WATER STORAGE SYSTEM AND AMMONIA-FUELED SHIP
The present invention provides an ammonia water storage system and an ammonia-fueled ship that can reduce influence of ammonia leakage on the human body and the environment. An ammonia water storage system 1 according to the present embodiment comprises: an ammonia water storage tank 2 which stores ammonia gas or ammonia water generated on a ship in the form of ammonia water; a recovery line 3 that conveys the ammonia gas or the ammonia water to the ammonia water storage tank 2; a water supply line 4 that supplies seawater to the ammonia water storage tank 2; a discharge line 5 that discharges the ammonia water stored in the ammonia water storage tank 2 to the outside of the ship; a concentration meter 6 that measures the concentration of the ammonia water stored in the ammonia water storage tank 2; and a control device 7 that controls the supply of the seawater to the ammonia water storage tank 2 on the basis of a measured value of the concentration meter 6.
B63B 83/40 - Rebuilding or retrofitting vessels, e.g. retrofitting ballast water treatment systems for reducing risks of pollution or contaminationRebuilding or retrofitting vessels, e.g. retrofitting ballast water treatment systems for improving safety
B63B 13/00 - Conduits for emptying or ballastingSelf-bailing equipmentScuppers
B63H 21/38 - Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
The objective of the present invention is to provide an ammonia-fueled ship that can reduce odor in areas of high human traffic. An ammonia-fueled ship 1 comprises an ammonia fuel tank 2 storing ammonia which is fuel, a re-liquefaction device 2 that re-liquefies vaporized gas generated from the ammonia fuel tank 2, an ammonia-fueled engine 4 that uses the ammonia as fuel, a fuel supply device 5 that supplies the ammonia from the ammonia fuel tank 2 to the ammonia-fueled engine 4, a bunker station 6 that supplies the ammonia to the ammonia fuel tank 2, an accommodation space 7 that provides working sections and living sections for crews, and an engine room 8 where the ammonia-fueled engine 4 is installed. An airlock space 13 is provided between a stairwell 72 and a corridor 74. Additionally, an airlock space 14 is provided between an elevator trunk 12 and an interior floor 81.
patents