Abstract: A suction pipe 200 of a centrifugal compressor 20, the centrifugal compressor 20 having a suction port 22 that is open to direct the working fluid to an impeller 21, the suction pipe 200 including a first opening portion 31 to be directly or indirectly connected to the suction port 22 and a second opening portion 32 positioned upstream from the first opening portion 31 in the flow direction of the working fluid. The second opening portion 32 is positioned below the first opening portion 31 in the vertical direction. The first opening portion 31 and the second opening portion 32 are open toward the same direction.

Abstract: A rotary machine 100 includes a bearing 10, a rotary shaft 20, a turbine wheel 30, a turbine nozzle 31, and a first cavity 40. The bearing 10 has a first end face 10a and a second end face 10b each positioned in the axial direction of the rotary shaft 20. The distance from the first end face 10a to the turbine wheel 30 is shorter than the distance from the second end face 10b to the turbine wheel 30. The first cavity 40 is positioned, in the axial direction of the rotary shaft 20, between a back surface 31b of the turbine nozzle 31 and the second end face 10b of the bearing 10 or between the back surface 31b of the turbine nozzle 31 and a space 11 that the second end face 10b of the bearing 10 faces. The first cavity 40 is present in the zone overlapping with the turbine nozzle 31 in a radial direction of the rotary shaft 20.

Abstract: A first thrust bearing includes a first electromagnet and a first member. A second thrust bearing includes a second electromagnet and a second member. A magnetic force generated by the first electromagnet and the second electromagnet, and dynamic gas pressure generated by the first member and the second member due to rotation of a rotating shaft support an axial load of the rotating shaft.

Abstract: A Rankine cycle apparatus includes: a sensor; a pump; an evaporator; an expander; a condenser; and a fluid circuit through which a working fluid flows. The fluid circuit includes a circulation circuit in which the pump, the evaporator, the expander, and the condenser are provided in this order. The sensor is configured to detect one of (I) a pressure of the working fluid, (II) a temperature of the working fluid, and (III) a temperature of a coding medium to be heat-exchanged with the working fluid in the condenser. First control is started if a detected value of the sensor is less than a first threshold value, the first control is control to cause the pump to circulate the working fluid through the evaporator and/or a heater.

Abstract: A gas turbine rotor includes a first rotor and a second rotor. The first rotor includes a compressor impeller, a turbine wheel, and a shaft. The turbine wheel has a common rotational axis with the compressor impeller. The shaft connects the compressor impeller to the turbine wheel. The second rotor is an electric generator rotor and defines an inner hollow space. The shaft includes an insertable portion disposed in the inner hollow space of the second rotor.

Abstract: A Rankine cycle apparatus includes a pump, an evaporator, an expander, a condenser, and an internal heat exchanger. The internal heat exchanger allows heat exchange to take place between a working fluid discharged from the expander and a working fluid discharged from the pump. A temperature of the working fluid at an inlet of the expander is set so that a temperature of the working fluid at an outlet of the expander be higher than a saturation temperature on a high-pressure side of the cycle.

Abstract: A gas turbine apparatus includes a first compressor, a combustor, and a first turbine. The first compressor compresses a working fluid. The combustor injects a fuel into the working fluid discharged from the first compressor and combusts the fuel. The first turbine expands combustion gas produced in the combustor. A bleeding cycle apparatus includes a second compressor and an expansion mechanism. The second compressor compresses the working fluid, extracted from the gas turbine apparatus, whose pressure has been raised by the first compressor. The expansion mechanism expands the working fluid discharged from the second compressor. A first heat exchanger performs a heat exchange between the working fluid compressed by the first compressor and to be expanded by the first turbine and the working fluid compressed by the second compressor and to be expanded by the expansion mechanism.

Abstract: A Rankine cycle apparatus includes a pump, an evaporator, an expander, a condenser, and an internal heat exchanger. The internal heat exchanger allows heat exchange to take place between a working fluid discharged from the expander and a working fluid discharged from the pump. A temperature of the working fluid at an inlet of the expander is set so that a temperature of the working fluid at an outlet of the expander be higher than a saturation temperature on a high-pressure side of the cycle.

Abstract: A flow distributor changes a ratio between a flow rate of a working fluid flowing from an inlet to a first outlet and a flow rate of the working fluid flowing from the inlet to a second outlet. Into the inlet, the working fluid that is boosted by a first compressor and that is extracted from a gas turbine apparatus flows. A second compressor compresses the working fluid flowing from the first outlet. A first cooler cools the working fluid discharged from the second compressor. The first cooler cools the working fluid flowing from the second outlet to bypass the second compressor. A second expansion turbine expands the working fluid flowing from the first cooler.

Abstract: A first thrust bearing includes a first electromagnet and a first member. A second thrust bearing includes a second electromagnet and a second member. A magnetic force generated by the first electromagnet and the second electromagnet, and dynamic gas pressure generated by the first member and the second member due to rotation of a rotating shaft support an axial load of the rotating shaft.

Abstract: A gas turbine rotor includes a first rotor and a second rotor. The first rotor includes a compressor impeller, a turbine wheel, and a shaft. The turbine wheel has a common rotational axis with the compressor impellor. The shaft connects the compressor impeller to the turbine wheel. The second rotor is an electric generator rotor and defines an inner hollow space. The shaft includes an insertable portion disposed in the inner hollow space of the second rotor.

Abstract: A fin satisfies 0°<?2<tan?1[(L±?)/{(S1?D1)/2?L/tan?1}], where S1 is a distance between an upstream end and a downstream end of a first inclined portion, D1 is a distance between an upstream end and a downstream end of a flat portion, ?1 is an angle between a reference plane and the first inclined portion in the flow direction, ?2 is an angle between the reference plane and the second inclined portion in the flow direction, ? is a distance between the reference plane and the flat portion, and L is a distance between the reference planes of the fins adjacent to each other. ?2 gradually decreases as a measurement direction of the angle is shifted from the row direction to the air flow direction and is minimum when the measurement direction is orientated in the air flow direction.

Abstract: A CHP system includes a combustor (heat source), a Rankine cycle apparatus, and a second heat exchanger. The Rankine cycle apparatus includes, as an evaporator, a first heat exchanger that absorbs thermal energy produced in the combustor. The second heat exchanger is located farther from the combustor than is the evaporator, is in direct contact with the evaporator or in indirect contact with the evaporator via a thermally-conductive member, absorbs thermal energy produced in the combustor, and transfers the thermal energy to a heat medium.

Abstract: A Rankine cycle apparatus (1A) of the present disclosure includes a main circuit (10), a heat exchange portion (HX), a bypass flow path (20), a flow rate-adjusting mechanism (3), and a pair of temperature sensors (7A). The main circuit (10) is formed by an expander (11), a condenser (13), a pump (14), and an evaporator (15) that are circularly connected in this order. The heat exchange portion (HX) is located in the main circuit (10) at a position between an outlet of the expander (11) and an inlet of the pump (14). The bypass flow path (20) branches from the main circuit (10) at a position between an outlet of the evaporator (15) and an inlet of the expander (11), and joins to the main circuit (10) at a position between the outlet of the expander (11) and an inlet of the heat exchange portion (HX). The flow rate-adjusting mechanism (3) adjusts the flow rate of the working fluid in the bypass flow path (20).

Abstract: A Rankine cycle apparatus includes a pump, an evaporator, an expander, and a condenser. The evaporator has a plurality of heat transfer tubes arranged in rows in a flow direction of a high-temperature fluid to be heat-exchanged with a working fluid. The heat transfer tube located in a most upstream row in the flow direction of the high-temperature fluid is defined as a most upstream heat transfer tube. For example, the most upstream heat transfer tube forms an inlet of the evaporator so that the working fluid flows into the evaporator through the inlet and first passes through the most upstream heat transfer tube.

Abstract: A refrigeration cycle apparatus (50) includes: a main refrigerant circuit (21) having a compressor (1), a radiator (2), a first expansion mechanism (5), a second expansion mechanism (6), and an evaporator (4); an injection passage (22) for supplying an intermediate-pressure refrigerant to an injection port 1c of the compressor 1; and a water circuit (30) through which water to be heated in the radiator (2) flows. The refrigeration cycle apparatus (50) includes a sub heat exchanger (3) for cooling the water in the water circuit (30) by exchanging heat between the refrigerant in the injection passage (22) and the water to be heated in the radiator (2).

Abstract: A heat pump hot-water supply system includes a heat pump hot-water supply device, an electricity storage device, and a control device. The control device determines an operating time zone of the heat pump hot-water supply device based on power conversion efficiency of the electricity storage device, coefficients of performance of the heat pump hot-water supply device of a current day and a next day, and an electricity rate structure of a commercial power system.

Abstract: A grid-connected power supply system includes a power generation apparatus configured to generate power by using natural energy and connected in parallel to a commercial power grid; a electricity storage device; and a control device configured. The control device predicts an amount of power to be generated on a subsequent day by the power generation apparatus and a power demand of the loads and charges the electricity storage device with power in a time zone in which an electricity rate of the commercial power grid is relatively low if a predicted value of the amount of power to be generated is lower than a predicted value of the power demand, or does not charge the electricity storage device with power during the time zone if the predicted value of the amount of power to be generated is not lower than the predicted value of the power demand.

Abstract: An electricity generation unit 1A includes a combustor 11, a heater 13, and a Rankine cycle circuit 20. The combustor 11 combusts a solid fuel. A combustion gas generated in the combustor 11 passes through a flue 12. The heater 13 contains a heat storage material, and heats the heat storage material by allowing heat exchange to take place between the combustion gas in the flue 12 and the heat storage material. The Rankine cycle circuit 20 has an evaporator 21 that evaporates a working fluid in the Rankine cycle by allowing heat exchange to take place between the heat storage material heated in the heater 13 and the working fluid. With this configuration, stable operation of an electricity generation unit using a combustion gas of a solid fuel is achieved.

Abstract: A heat pump hot-water supply system includes a heat pump hot-water supply device, a storage tank for storing hot water obtained by operating the heat pump hot-water supply device, and a control device for controlling starting/stopping of the heat pump hot-water supply device. The control device estimates an outside air temperature of a place where the heat pump hot-water supply device is installed and determines an operating time zone of the heat pump hot-water supply device based on an estimated value of the outside air temperature.