Abstract: A cooling liquid circulation unit circulates cooling liquid in an immersion tank for immersing and cooling electronic devices in the cooling liquid and includes a flow rate adjustment part provided in a cooling liquid circulation path for circulating the cooling liquid in the immersion tank, a heat exchanger for exchanging heat between the cooling liquid and a cooling medium, the heat exchanger being provided in the cooling liquid circulation path, and a cooling liquid circulation unit controller that includes a mode selection part for selecting any one of a plurality of cooling modes, a calculation part for calculating a necessary cooling amount based on parameters related to operation states of the electronic devices, and a cooling condition setting part for setting a target value of parameters related to the flow rate of the cooling liquid based on the selected cooling mode and the necessary cooling amount.

Abstract: A container-type data center includes a container body, a liquid tank rack which is accommodated in the container body and stores a cooling liquid therein, a board which is disposed inside the liquid tank rack to be immersed in the cooling liquid and on which a plurality of electronic components are mounted, a heat exchanger which is accommodated in the container body and cools the cooling liquid guided from the inside of the liquid tank rack and returns the cooling liquid to the liquid tank rack, and a drain pan which is accommodated in the container body and receives the cooling liquid leaking from the liquid tank rack on the lower side of the liquid tank rack.

Abstract: A liquid coolant circulation system that circulates a liquid coolant to an immersion tank for cooling a plurality of electronic devices by immersing the plurality of electronic devices in the liquid coolant, includes: a first flow rate adjustment unit provided in a liquid coolant circulation path for circulating the liquid coolant to the immersion tank; a heat exchanger provided in the liquid coolant circulation path and exchanging heat between the liquid coolant and a cooling medium; a cooling unit that supplies the cooling medium to the heat exchanger; and a system control device that controls the first flow rate adjustment unit and the cooling unit. The cooling unit includes: a cooling part for cooling the cooling medium; and a second flow rate adjustment unit that adjusts a flow rate of the cooling medium.

Abstract: An immersion cooling device includes a container which stores therein a cooling liquid, a substrate which is disposed so as to be immersed in the cooling liquid in the container and to which a plurality of electronic components are mounted, and nozzles which eject the cooling liquid such that the cooling liquid flows from one end of the substrate to the other end of the substrate, over the surface on which the electronic components are provided. A plurality of nozzles are provided so that a plurality of cooling liquid currents flowing from the one end to the other end of the substrate are formed in parallel.

Abstract: An internal combustion engine includes: an engine body (10) having at least one cylinder; and an air-supply manifold (4) including an adjustment pipe (12). The length of the adjustment pipe is set so that a first pressure wave (14A) propagating from the air-supply manifold toward the adjustment pipe and a second pressure wave (14B) propagating from the adjustment pipe toward the air-supply manifold have opposite phases from each other at the cylinder.

Abstract: Provided are a combined machining apparatus and a combined machining method capable of performing machining with higher accuracy and at a high speed. The apparatus has a stage unit; a mechanical machining unit including a mechanical machining head having a tool configured to machine a workpiece; a laser machining unit including a laser machining head configured to emit laser for machining the workpiece; a moving unit; and a control unit that controls the operation of each unit, in which the laser machining head has a laser turning unit that turns laser relative to the workpiece, and a condensing optical system that focuses the laser turned by the laser turning unit, and a position at which the workpiece is irradiated with the laser is rotated by the laser turning unit.

Abstract: An internal combustion engine includes: an engine body (10) having at least one cylinder; and an air-supply manifold (4) including an adjustment pipe (12). The length of the adjustment pipe is set so that a first pressure wave (14A) propagating from the air-supply manifold toward the adjustment pipe and a second pressure wave (14B) propagating from the adjustment pipe toward the air-supply manifold have opposite phases from each other at the cylinder.

Abstract: Provided are a combined machining apparatus and a combined machining method capable of performing machining with higher accuracy and at a high speed. The apparatus has a stage unit; a mechanical machining unit including a mechanical machining head having a tool configured to machine a workpiece; a laser machining unit including a laser machining head configured to emit laser for machining the workpiece; a moving unit; and a control unit that controls the operation of each unit, in which the laser machining head has a laser turning unit that turns laser relative to the workpiece, and a condensing optical system that focuses the laser turned by the laser turning unit, and a position at which the workpiece is irradiated with the laser is rotated by the laser turning unit.

Abstract: A ship powered by an internal combustion engine (1) and an electric motor (2) connected to a propeller (3) powered by surplus electric power obtained by a thermal discharge recovery system has a controller including a feedback control section for controlling a base amount of fuel injected to the internal combustion engine (1) based on the difference between the target number of rotation of the propeller given by the operator and the real number of rotation, and a feed-forward control section having a means (25) for calculating an overall power output and a means (26) for calculating a correction in the amount of fuel injected to the internal combustion engine based on the overall power output and the number of rotation of the propeller. The base amount of fuel is corrected by subtracting the correction obtained by the feed-forward section from the base amount of fuel calculated by the feedback control section whereby preventing a rapid change in the speed of the ship due to rapid change in ship loads.

Abstract: A ship powered by an internal combustion engine (1) and an electric motor (2) connected to a propeller (3) powered by surplus electric power obtained by a thermal discharge recovery system has a controller including a feedback control section for controlling a base amount of fuel injected to the internal combustion engine (1) based on the difference between the target number of rotation of the propeller given by the operator and the real number of rotation, and a feed-forward control section having a means (25) for calculating an overall power output and a means (26) for calculating a correction in the amount of fuel injected to the internal combustion engine based on the overall power output and the number of rotation of the propeller. The base amount of fuel is corrected by subtracting the correction obtained by the feed-forward section from the base amount of fuel calculated by the feedback control section whereby preventing a rapid change in the speed of the ship due to rapid change in ship loads.

Abstract: A diesel engine fuel soundness control system includes: a density measuring instrument 11 that measures a density of a fuel F of a diesel engine (D/E) in real time; a micro carbon residue (MCR) measuring instrument 12 that measures an MCR in the fuel F of the diesel engine (D/E) in real time; and a control device (CPU) 13 that changes an operation mode of the diesel engine when values of the density and the micro carbon residue (MCR) of the fuel F are obtained and an obtained result is out of a range of soundness of a density-to-MCR characteristic map obtained in advance.