Abstract: A compression device is equipped with a compressor (102) and a heat energy recovery unit (200) that recovers heat energy from a compressed gas. The heat energy recovery unit (200) is equipped with: a heat exchanger (202) that has an inflow port (202a), and that heats an operating medium by means of the heat from the compressed gas; an expansion device (210); a power recovery unit (212); a condenser (214); and a pump (222). The heat exchanger (202) is arranged closer to the compressor (102) than the expansion device (210), and is oriented such that the inflow port (202a) faces the compressor (102).

Abstract: A heat energy recovery system includes an evaporator, a superheater, an expander, a power recovery device, a condenser, a pump, and a controller. The controller includes: an engine load calculation section; a maximum rotation speed determination section for determining a maximum rotation speed of the pump which is obtained when a pinch temperature reaches a target pinch temperature, based on a relational expression representing a relationship between the engine load and the maximum rotation speed, and an engine load; and a rotation speed regulation section for regulating the rotation speed of the pump in such a way as to allow the degree of superheat of the working medium flowing into the expander to be equal to or greater than a reference value, and to allow the rotation speed to be equal to or less than a maximum rotation speed determined by the maximum rotation speed determination section.

Abstract: A thermal energy recovery device capable of suppressing a rapid increase of thermal stress generated in an evaporator when the operation is started and a start-up method thereof are provided. The thermal energy recovery device includes an evaporator, a preheater, an energy recovery unit, a circulating flow path, a pump, a heating medium flow path for supplying a heating medium to the evaporator and the preheater, a flow adjustment unit provided in a portion on the upstream side than the evaporator within the heating medium flow path, and a control unit. The control unit controls the flow adjustment unit so that the inflow amount of the heating medium in a gas-phase to the evaporator gradually increases, in a state that the pump is stopped, until the temperature of the evaporator becomes a specified value.

Abstract: Disclosed is a heat energy recovery system including: a heat energy recovery circuit that causes a working medium to circulate by means of a circulation pump to exchange heat with supercharged air from a supercharger via a first heater and exchange heat with steam from an exhaust-gas economizer via a second heater, in order to integrally drive a turbine and a generator; and a controller that performs stop control to stop the circulation pump based on the flow state of the steam in a first steam flow path that causes the steam to flow from the exhaust-gas economizer to a soot blower.

Abstract: Provided is a heat-collecting-type power generation system capable of maintaining a stable power generation efficiency even if supplied heat varies. The system includes an evaporator that heats and vaporizes a working medium; a displacement-type expander driven by the vaporized working medium; a power generator driven together with the expander; a condenser that cools and condenses the gas-phase working medium sent from the expander; and a circulation pump that draws the condensed liquid-phase working medium, raises pressure and transports the same to the evaporator, wherein the expander includes a plurality of expansion parts that expand the working medium stepwise, and internal volume ratios of the expansion parts are adjusted in a design phase, so that if at least one of a suction pressure and a discharge pressure of the expander varies, an overall thermal insulation efficiency is 70 percent or more, in a range of the variation.

Abstract: An energy recovery device includes a plurality of heat exchangers connected in parallel with each other into which a plurality of heat sources flow, an expander for expanding a working medium, a dynamic power recovery unit, a condenser, a pump for sending the working medium which has flown out from the condenser to the plurality of heat exchangers, and a regulator for regulating inflow rates of the working medium flowing into the plurality of heat exchangers. The regulator regulates the inflow rates of the liquid phase working medium flowing into the plurality of respective heat exchangers such that a difference of temperatures or a difference of degrees of superheat of the gas phase working medium which has flown out from the plurality of respective heat exchangers falls within a certain range. Thereby, heat energy can be efficiently recovered from the plurality of heat sources having temperatures different from each other.

Abstract: A compressing device of the present invention comprises a compressor, a heat exchanger, an expander, a power recovery unit, a condenser, a pump, a bypass flow passage for bypassing the expander, and a bypass valve. When a bypass condition for allowing a working medium to circulate through the bypass flow passage is satisfied, the bypass valve is caused to be opened, thereby allowing the working medium to circulate between the heat exchanger and the condenser through the bypass flow passage. As a result, a compressed gas discharged from the compressor is cooled by the working medium in the heat exchanger. This configuration makes it possible to cool the compressed gas by the working medium in the heat exchanger regardless of operation conditions of the expander.

Abstract: A rotary machine drive system includes: a first heat source heat exchanger that receives a first heating medium and gasifies a liquid working medium; a first expander that is connected to a rotation shaft and rotates the rotation shaft by expanding the working medium that has been gasified by the first heat source heat exchanger; a rotary machine that has a rotor part provided to the rotation shaft; a second heat source heat exchanger that receives a second heating medium and gasifies a liquid working medium; a second expander that is connected to the rotation shaft and rotates the rotation shaft by expanding the second heating medium; and a condenser that condenses the working medium that has been used in the first expander and the working medium that has been used in the second expander.

Abstract: A heat energy recovery device 1, which recovers heat energy of a heat medium by utilizing a Rankine cycle of a working medium, comprises a first heater 2, a second heater 3, an expander 4, an oil separation unit 12, a condenser 6, a working medium pump 7, and an oil-leading passage 10. When the height of a liquid level in the oil separation unit 12 is less than a lower limit value, a control unit 16 first performs a speed reduction control of the working medium pump 7 to reduce an inflow rate of a working medium into the second heater 3, and after a fixed period of time, performs an opening control for opening an on-off unit 11. By the opening of the on-off valve 11, oil L1 in the second heater 3 is led out to the oil separation unit 12 through the oil-leading passage 10.

Abstract: A thermal energy recovery device of the present invention includes a heater that evaporates a working medium by a heat medium, an expander into which the working medium flowing out from the heater flows, a power generator that recovers expansion energy of the working medium expanded in the expander, a condenser of a condensing unit that condenses the working medium flowing out from the expander, and a pump that feeds the working medium condensed in the condenser to the heater. A connection portion between the condenser and the pump has a connection end portion connected to an inflow port of the pump, a bent portion bent upward from the connection end portion, and a standing portion extending upward from the bent portion so that the working medium in a gas phase is suppressed from coming into the pump even in an environment where vibration is generated.

Abstract: A thermal energy recovery device includes a heater that evaporates a working medium by heat of a heat medium, an expander into which the working medium flowing out from the heater flows, a driving machine connected to the expander, a condenser that condenses the working medium flowing out from the expander by a cooling medium, a reservoir unit that reserves the working medium condensed in the condenser, a pump that feeds the working medium flowing out from the reservoir unit to the heater, a circulation flow passage of the working medium that connects the heater, the expander, the condenser, the reservoir unit, and the pump in this order, and a pump control unit that controls drive of the pump, and the pump control unit drives the pump after the heat medium is supplied to the heater and the cooling medium is supplied to the condenser.

Abstract: A waste heat recovery device including: a heater which evaporates an working medium by exchanging heat between supercharging air supplied to an engine and the working medium; a heat exchanger which heats the working medium by exchanging heat between the working medium which has flowed out from the heater and a heating medium; and an expander into which the working medium which has flowed out from the heat exchanger flows; a motive power recovery device; a condenser which condenses the working medium; and a pump which sends the working medium to a heater.

Abstract: A waste heat recovery system includes: a heater which evaporates a working medium by exchanging heat between supercharged air supplied to an engine and the working medium; an expander which expands the working medium which has flowed out from the heater; a power recovery device connected to the expander; a condenser which condenses the working medium which has flowed out from the expander; a cooling medium supply pipe for supplying a cooling medium to an air cooler which cools the supercharged air which has flowed out from the heater; a cooling medium pump which is provided in the cooling medium supply pipe and which sends the cooling medium to the air cooler; and a branch pipe which bifurcates a part of the cooling medium flowing in the cooling medium supply pipe, to the condenser, in such a manner that the working medium is cooled by the cooling medium.

Abstract: A power generation apparatus includes a housing that contains a driving unit of the expander within a space enclosed by a partition wall, and a magnetic coupling that is divided between the inside and outside of the housing through the partition wall and that transmits the rotational driving force of the expander to the exterior of the housing. The magnetic coupling includes driving-side magnets and slave-side magnets, and first and second magnetic path formation members respectively magnetically connect the driving-side magnets and also the slave-side magnets.

Abstract: A rotary machine drive system includes: a first heat source heat exchanger that receives a first heating medium and gasifies a liquid working medium; a first expander that is connected to a rotation shaft and rotates the rotation shaft by expanding the working medium that has been gasified by the first heat source heat exchanger; a rotary machine that has a rotor part provided to the rotation shaft; a second heat source heat exchanger that receives a second heating medium and gasifies a liquid working medium; a second expander that is connected to the rotation shaft and rotates the rotation shaft by expanding the second heating medium; and a condenser that condenses the working medium that has been used in the first expander and the working medium that has been used in the second expander.

Abstract: Provided is a power generating apparatus capable of using power generated by a heat engine in combination with power of a driving source provided separately from the heat engine. In order to prevent a problem caused when activating and stopping the apparatus, the apparatus of the present invention includes a rotary machine driving source which generates a rotational driving force for a rotary machine and a heat engine which drives the rotary machine in cooperation with the rotary machine driving source, wherein the heat engine includes an expander which expands an evaporated working medium so as to generate a rotational driving force, the expander is provided with a bypass pipe which causes a working medium inlet of the expander to communicate with a working medium outlet thereof, and the bypass pipe is provided with an on-off valve which opens and closes the bypass pipe.

Abstract: A power generation apparatus includes an expander and a power transmission shaft that extracts a rotational driving force generated by the expander to the exterior of a housing of the expander. The housing of the expander contains a driving unit of the expander within a space enclosed by a partition wall of the housing. The power transmission shaft includes a magnetic coupling, divided between the interior and exterior of the housing of the expander through the partition wall. The rotational driving force extracted via the magnetic coupling is used as auxiliary power that supplements the power of a driving source provided separately from the expander when driving a rotating machine using the power of the driving source. A clutch mechanism and a speed variator are provided in a power transmission path that transmits the rotational driving force extracted by the power transmission shaft to the driving source.

Abstract: For a power generation apparatus to efficiently extract rotational driving force generated by an expander to the exterior of a housing that contains the expander while preventing a working medium from leaking, the power generation apparatus according to the present invention includes a housing that contains a driving unit of the expander within a space enclosed by a partition wall, and a magnetic coupling that is divided between the inside and outside of the housing through the partition wall and that transmits the rotational driving force of the expander to the exterior of the housing.

Abstract: A kneading screw is disclosed which comprises a screw body, the screw body comprising a feed section and a kneading section, the feed section comprising screw segments for feeding a to-be-kneaded material to a downstream side and the kneading section comprising kneading segments for kneading the material. The screw body is provided within the kneading section with a multi-stage portion which gradually changes axially in rotating outside diameter. It is preferable that the multi-stage portion be constituted by kneading segments of plural kneading discs different in rotating outside diameter. With such a construction, it is possible to avoid stress concentration on an axial part of the kneading screw and thereby prevent breaking of a spline shaft and abnormal wear of kneading flights.

Abstract: A kneading screw is disclosed which comprises a screw body, the screw body comprising a feed section and a kneading section, the feed section comprising screw segments for feeding a to-be-kneaded material to a downstream side and the kneading section comprising kneading segments for kneading the material. The screw body is provided within the kneading section with a multi-stage portion which gradually changes axially in rotating outside diameter. It is preferable that the multi-stage portion be constituted by kneading segments of plural kneading discs different in rotating outside diameter. With such a construction, it is possible to avoid stress concentration on an axial part of the kneading screw and thereby prevent breaking of a spline shaft and abnormal wear of kneading flights.