Ihi Corporation

Hirohisa Wakisaka

Toshio Takahashi

Seiichiro Yoshinaga

Kouichi Machida

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.

Waste heat power generation device

A waste heat power generator (G, G) that includes an evaporator () to produce steam of a working medium, a power-generating device to generate electric power while expanding the steam, a condenser () to condense the steam which has passed through the power-generating device (), and a pump () to send the condensed working medium to the evaporator (). The waste heat power generator (G, G) may further include a valve device () to selectively supply a cooling medium used to cool the power-generating device () to the power-generating device (), and a controller () to control the valve device () based on the temperature of the power-generating device ().

Waste heat power generator

The waste heat power generator (G) includes: an evaporator () configured to produce steam of a working medium; a power-generating device () configured to generate electric power while expanding the steam; a condenser () configured to condense the steam which has passed through the power-generating device (); and a pump () configured to send the condensed working medium to the evaporator (). A bottom portion (BT) of the power-generating device () is provided with a discharge port () configured to discharge the working medium liquefied inside the power-generating device (), to the outside thereof. A discharge pipe () is provided in which one end thereof is connected to the discharge port () and the other end thereof is disposed in a channel for the working medium between the condenser () and the pump ().

This waste heat power generator (G) includes: an evaporator () to recover heat energy and to produce a vapor of a working medium; a power-generating device () to generate electric power while expanding the vapor; a condenser () to condense the vapor which has passed through the power-generating device; a pump () to send the working medium which has been condensed at the condenser to the evaporator; and a grease supply device () to supply the power-generating device with a grease used to lubricate bearings provided in the power-generating device.

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.

Heat insulating structure for expansion turbine, and method of manufacturing the same

A braking mechanism is provided that is suitable for an expansion turbine that rotates at high speed. Upper end salient polesandare formed in two opposite places on the outer peripheral upper end of a rotating shaft, and lower end salient polesandare formed in two opposite places on the outer peripheral lower end of the rotating shaftsuch that they are staggered in the vertical direction with respect to the upper end salient polesand. A casingis provided in a location facing an outer periphery of the rotating shaft, and an excitation coilis provided on the casingfor forming a magnetic path between the upper end salient polesandand the lower end salient polesand. By rotation of the rotating shaft, and by the magnetic path formed by the excitation coil, eddy currents are generated in the casing

Expansion turbine

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.

Expansion turbine having a variable nozzle mechanism

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.

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Chigasaki, Japan

Hirohisa Wakisaka