Patents by Inventor Hirohisa Wakisaka
Hirohisa Wakisaka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9784138Abstract: A waste heat power generation device having: an evaporator that recovers waste heat energy to evaporate a working medium; an expansion turbine generator that generates electric power with the working medium being supplied from the evaporator; a condenser that condenses the working medium discharged from the expansion turbine generator; a pump that feeds the working medium condensed in the condenser toward the evaporator; a measuring device that measures the amount of power generated by the expansion turbine generator per unit time; and a control device that controls the driving of the pump based on the measurement result of the measuring device.Type: GrantFiled: May 12, 2015Date of Patent: October 10, 2017Assignee: IHI CORPORATIONInventors: Toshio Takahashi, Hirohisa Wakisaka, Kouichi Machida
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Patent number: 9677414Abstract: A waste heat power generator (G1, G2) that includes an evaporator (1) to produce steam of a working medium, a power-generating device to generate electric power while expanding the steam, a condenser (3) to condense the steam which has passed through the power-generating device (2), and a pump (5) to send the condensed working medium to the evaporator (1). The waste heat power generator (G1, G2) may further include a valve device (6) to selectively supply a cooling medium used to cool the power-generating device (2) to the power-generating device (2), and a controller (7) to control the valve device (6) based on the temperature of the power-generating device (2).Type: GrantFiled: June 19, 2012Date of Patent: June 13, 2017Assignee: IHI CORPORATIONInventors: Toshio Takahashi, Hirohisa Wakisaka, Kouichi Machida
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Patent number: 9376938Abstract: The waste heat power generator (G) includes: an evaporator (1) configured to produce steam of a working medium; a power-generating device (2, 2a, 2b) configured to generate electric power while expanding the steam; a condenser (3) configured to condense the steam which has passed through the power-generating device (2, 2a, 2b); and a pump (5) configured to send the condensed working medium to the evaporator (1). A bottom portion (BT) of the power-generating device (2, 2a, 2b) is provided with a discharge port (8) configured to discharge the working medium liquefied inside the power-generating device (2, 2a, 2b), to the outside thereof. A discharge pipe (6) is provided in which one end thereof is connected to the discharge port (8) and the other end thereof is disposed in a channel for the working medium between the condenser (3) and the pump (5).Type: GrantFiled: June 21, 2012Date of Patent: June 28, 2016Assignee: IHI CORPORATIONInventors: Toshio Takahashi, Hirohisa Wakisaka, Kouichi Machida
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Patent number: 9219404Abstract: This waste heat power generator (G) includes: an evaporator (1) to recover heat energy and to produce a vapor of a working medium; a power-generating device (2) to generate electric power while expanding the vapor; a condenser (3) to condense the vapor which has passed through the power-generating device; a pump (4) to send the working medium which has been condensed at the condenser to the evaporator; and a grease supply device (5) to supply the power-generating device with a grease used to lubricate bearings provided in the power-generating device.Type: GrantFiled: August 18, 2011Date of Patent: December 22, 2015Assignee: IHI CORPORATIONInventors: Toshio Takahashi, Hirohisa Wakisaka
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Publication number: 20150247427Abstract: A waste heat power generation device having: an evaporator that recovers waste heat energy to evaporate a working medium; an expansion turbine generator that generates electric power with the working medium being supplied from the evaporator; a condenser that condenses the working medium discharged from the expansion turbine generator; a pump that feeds the working medium condensed in the condenser toward the evaporator; a measuring device that measures the amount of power generated by the expansion turbine generator per unit time; and a control device that controls the driving of the pump based on the measurement result of the measuring device.Type: ApplicationFiled: May 12, 2015Publication date: September 3, 2015Applicant: IHI CorporationInventors: Toshio TAKAHASHI, Hirohisa WAKISAKA, Kouichi MACHIDA
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Publication number: 20140110945Abstract: The waste heat power generator (G) includes: an evaporator (1) configured to produce steam of a working medium; a power-generating device (2, 2a, 2b) configured to generate electric power while expanding the steam; a condenser (3) configured to condense the steam which has passed through the power-generating device (2, 2a, 2b); and a pump (5) configured to send the condensed working medium to the evaporator (1). A bottom portion (BT) of the power-generating device (2, 2a, 2b) is provided with a discharge port (8) configured to discharge the working medium liquefied inside the power-generating device (2, 2a, 2b), to the outside thereof. A discharge pipe (6) is provided in which one end thereof is connected to the discharge port (8) and the other end thereof is disposed in a channel for the working medium between the condenser (3) and the pump (5).Type: ApplicationFiled: June 21, 2012Publication date: April 24, 2014Applicant: IHI CorporationInventors: Toshio Takahashi, Hirohisa Wakisaka, Kouichi Machida
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Publication number: 20140110939Abstract: The waste heat power generator (G1, G2) includes: an evaporator (1) configured to produce steam of a working medium; a power-generating device (2) configured to generate electric power while expanding the steam; a condenser (3) configured to condense the steam which has passed through the power-generating device (2); and a pump (5) configured to send the condensed working medium to the evaporator (1). Furthermore, the waste heat power generator (G1, G2) includes: a valve device (6) configured to perform supply or supply stop of a cooling medium used to cool the power-generating device (2), to the power-generating device (2); and a controller (7) configured to control the valve device (6) based on a temperature of the power-generating device (2).Type: ApplicationFiled: June 19, 2012Publication date: April 24, 2014Inventors: Toshio Takahashi, Hirohisa Wakisaka, Kouichi Machida
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Publication number: 20130127179Abstract: This waste heat power generator (G) includes: an evaporator (1) to recover heat energy and to produce a vapor of a working medium; a power-generating device (2) to generate electric power while expanding the vapor; a condenser (3) to condense the vapor which has passed through the power-generating device; a pump (4) to send the working medium which has been condensed at the condenser to the evaporator; and a grease supply device (5) to supply the power-generating device with a grease used to lubricate bearings provided in the power-generating device.Type: ApplicationFiled: August 18, 2011Publication date: May 23, 2013Inventors: Toshio Takahashi, Hirohisa Wakisaka
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Patent number: 8262350Abstract: A heat insulating structure for an expansion turbine includes an adiabatic expansion device including an expander body that includes an outlet passage for refrigerant fluid at a central portion thereof and an introduction chamber for refrigerant fluid communicating with an inlet of the outlet passage on an outer peripheral portion thereof, and a turbine impeller that is rotatably provided at the inlet and braked by a braking device. The adiabatic expansion device adiabatically expands refrigerant fluid by rotating the turbine impeller with refrigerant fluid that flows from the introduction chamber to the outlet passage side. A heat-insulating layer, which surrounds the entire periphery of the outlet passage over the entire length of the introduction chamber, is formed between the introduction chamber and the outlet passage. Accordingly, it is possible to improve turbine efficiency by reducing transfer of heat of refrigerant fluid from the introduction chamber to the outlet passage.Type: GrantFiled: March 25, 2008Date of Patent: September 11, 2012Assignee: IHI CorporationInventors: Seiichiro Yoshinaga, Toshio Takahashi, Hirohisa Wakisaka
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Patent number: 8257026Abstract: A braking mechanism is provided that is suitable for an expansion turbine that rotates at high speed. Upper end salient poles 26a and 26b are formed in two opposite places on the outer peripheral upper end of a rotating shaft 12, and lower end salient poles 28a and 28b are formed in two opposite places on the outer peripheral lower end of the rotating shaft 12 such that they are staggered in the vertical direction with respect to the upper end salient poles 26a and 26b. A casing 22 is provided in a location facing an outer periphery of the rotating shaft 12, and an excitation coil 30 is provided on the casing 22 for forming a magnetic path between the upper end salient poles 26a and 26b and the lower end salient poles 28a and 28b. By rotation of the rotating shaft 12, and by the magnetic path formed by the excitation coil 30, eddy currents are generated in the casing 22.Type: GrantFiled: March 25, 2008Date of Patent: September 4, 2012Assignee: IHI CorporationInventors: Toshio Takahashi, Seiichiro Yoshinaga, Hirohisa Wakisaka
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Patent number: 8231339Abstract: Expansion turbine having a variable nozzle mechanism comprises an adiabatic expansion device located in a vacuum container having a turbine impeller therein which rotates and drives the turbine impeller during adiabatic expansion of very low temperature gas, and varies the throat area of very low temperature gas introduced in the turbine impeller by driving a nozzle member disposed near the outside end of the adiabatic expansion device by a drive force from a driving member located outside the vacuum container; wherein the driving member comprises a cylindrical member disposed coaxially with the turbine impeller, and the nozzle member is provided on the extension of the body of the cylindrical member in the axial direction.Type: GrantFiled: March 28, 2008Date of Patent: July 31, 2012Assignee: IHI CorporationInventors: Seiichiro Yoshinaga, Toshio Takahashi, Hirohisa Wakisaka
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Patent number: 8113769Abstract: Expansion turbine having a variable nozzle mechanism comprises an adiabatic expansion device located in a vacuum container having a turbine impeller therein which rotates and drives the turbine impeller during adiabatic expansion of very low temperature gas, and varies the throat area of very low temperature gas introduced in the turbine impeller by driving a nozzle member disposed near the outside end of the adiabatic expansion device by a drive force from a driving member located outside the vacuum container; a plate member provided detachably in contact with the outside end of the body of the adiabatic expansion device, wherein the support side of the nozzle member is connected to and supported by the plate member, and the drive side of the nozzle member is connected to and supported by the driving member.Type: GrantFiled: March 31, 2008Date of Patent: February 14, 2012Assignee: IHI CorporationInventors: Toshio Takahashi, Seiichiro Yoshinaga, Hirohisa Wakisaka
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Publication number: 20110311350Abstract: A turbo machine includes an impeller that rotates to make gas flow, a driving device that rotationally drives the impeller, a rotary shaft that transmits a rotational driving force of the driving device to the impeller, a bearing that rotatably supports the rotary shaft, and a casing that houses at least the driving device and the rotary shaft. In addition, the casing is provided with a grease flow path to supply grease to the bearing for lubricating the bearing.Type: ApplicationFiled: June 10, 2011Publication date: December 22, 2011Inventors: Toshio TAKAHASHI, Hirohisa WAKISAKA
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Publication number: 20100275616Abstract: A cryogenic refrigerator (10) which generates a cryogenic temperature by compressing and expanding a working gas in a closed loop (11). The cryogenic refrigerator comprises a bypass line (22) allowing a high-pressure portion and a low-pressure portion to communicate with each other, a gas storage tank (24) located midway in the bypass line and having pressure regulation valves (23a, 23b) on the high-pressure side and the low-pressure side, respectively, and a pressure control unit (26) controlling the pressure regulation valves. The pressure control unit (26) controls the pressure regulation valves (23a, 23b) so that the pressure in the gas storage tank (24) is equal to the pressure in the closed loop at room temperature and in a stopped state and so that the pressure in the gas storage tank (24) is between the pressures in the high-pressure portion and in the low-pressure portion and is close to the pressure in the low-pressure portion in an operating state.Type: ApplicationFiled: November 5, 2008Publication date: November 4, 2010Applicant: IHI CORPORATIONInventors: Nobuyoshi Saji, Toshio Takahashi, Seiichiro Yoshinaga, Hirohisa Wakisaka
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Publication number: 20090028693Abstract: A braking mechanism is provided that is suitable for an expansion turbine that rotates at high speed. Upper end salient poles 26a and 26b are formed in two opposite places on the outer peripheral upper end of a rotating shaft 12, and lower end salient poles 28a and 28b are formed in two opposite places on the outer peripheral lower end of the rotating shaft 12 such that they are staggered in the vertical direction with respect to the upper end salient poles 26a and 26b. A casing 22 is provided in a location facing an outer periphery of the rotating shaft 12, and an excitation coil 30 is provided on the casing 22 for forming a magnetic path between the upper end salient poles 26a and 26b and the lower end salient poles 28a and 28b. By rotation of the rotating shaft 12, and by the magnetic path formed by the excitation coil 30, eddy currents are generated in the casing 22.Type: ApplicationFiled: March 25, 2008Publication date: January 29, 2009Inventors: Toshio Takahashi, Seiichiro Yoshinaga, Hirohisa Wakisaka
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Publication number: 20080240911Abstract: A heat insulating structure for an expansion turbine includes an adiabatic expansion device including an expander body that includes an outlet passage for refrigerant fluid at a central portion thereof and an introduction chamber for refrigerant fluid communicating with an inlet of the outlet passage on an outer peripheral portion thereof, and a turbine impeller that is rotatably provided at the inlet and braked by a braking device. The adiabatic expansion device adiabatically expands refrigerant fluid by rotating the turbine impeller with refrigerant fluid that flows from the introduction chamber to the outlet passage side. A heat-insulating layer, which surrounds the entire periphery of the outlet passage over the entire length of the introduction chamber, is formed between the introduction chamber and the outlet passage. Accordingly, it is possible to improve turbine efficiency by reducing transfer of heat of refrigerant fluid from the introduction chamber to the outlet passage.Type: ApplicationFiled: March 25, 2008Publication date: October 2, 2008Inventors: Seiichiro Yoshinaga, Toshio Takahashi, Hirohisa Wakisaka
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Publication number: 20080240907Abstract: Expansion turbine having a variable nozzle mechanism comprises an adiabatic expansion device located in a vacuum container having a turbine impeller threrein which rotates and drives the turbine impeller during adiabatic expansion of very low temperature gas, and varies the throat area of very low temperature gas introduced in the turbine impeller by driving a nozzle member disposed near the outside end of the adiabatic expansion device by a drive force from a driving member located outside the vacuum container; wherein the driving member comprises a cylindrical member disposed coaxially with the turbine impeller, and the nozzle member is provided on the extension of the body of the cylindrical member in the axial direction.Type: ApplicationFiled: March 28, 2008Publication date: October 2, 2008Inventors: Seiichiro YOSHINAGA, Toshio TAKAHASHI, Hirohisa WAKISAKA
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Publication number: 20080240908Abstract: Expansion turbine having a variable nozzle mechanism comprises an adiabatic expansion device located in a vacuum container having a turbine impeller therein which rotates and drives the turbine impeller during adiabatic expansion of very low temperature gas, and varies the throat area of very low temperature gas introduced in the turbine impeller by driving a nozzle member disposed near the outside end of the adiabatic expansion device by a drive force from a driving member located outside the vacuum container; a plate member provided detachably in contact with the outside end of the body of the adiabatic expansion device, wherein the support side of the nozzle member is connected to and supported by the plate member, and the drive side of the nozzle member is connected to and supported by the driving member.Type: ApplicationFiled: March 31, 2008Publication date: October 2, 2008Inventors: Toshio TAKAHASHI, Seiichiro YOSHINAGA, Hirohisa WAKISAKA