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Power generation device

A technology for power generation devices and generators, which is applied to safety devices, steam engine devices, engine components, etc., can solve problems such as the decline in power generation, and achieve the effect of suppressing fluctuations in power generation.

Inactive Publication Date: 2014-06-18
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the power generator of the power generation device of the above-mentioned prior art, if the temperature of the heat source of the evaporator or the condenser (hereinafter referred to as "surrounding temperature") changes, the enthalpy of the working medium flowing into the expander is different from that of the heat source from the expander. The difference in enthalpy of the outflowing working medium becomes smaller, and the power generation decreases

Method used

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no. 1 approach ）

[0031] while referring to Figure 1 to Figure 5 A power generator according to a first embodiment of the present invention will be described.

[0032] Such as figure 1 As shown, the power generation device includes an evaporator 11 for heating and evaporating the working medium, an expander 12 driven by the working medium discharged from the evaporator 11, and a device for cooling and condensing the working medium discharged from the expander 12. The condenser 13, the circulation pump 14 that sends the working medium discharged from the condenser 13 to the evaporator 11, the circulation channel 15 that forms a closed circuit for circulating the working medium by connecting these devices 11 to 14 to each other, 12 A generator 16 that obtains power to generate electricity, a suction-side detection mechanism 21 and 22 that can detect a value used in the calculation of the state quantity (enthalpy) of the working medium flowing into the expander 12, and controls the rotational sp...

no. 2 approach ）

[0067] while referring to Figure 6 ~ Figure 8 A second embodiment of the present invention will be described. In addition, in this second embodiment, only the parts different from those of the first embodiment will be described, and the description of the same structure, operations, and effects as those of the first embodiment will be omitted.

[0068] The power generator of the present embodiment includes a discharge-side pressure sensor 23 and a condenser-side temperature sensor 24 instead of the suction-side pressure sensor 21 and the evaporator-side temperature sensor 22 of the first embodiment.

[0069] The discharge side pressure sensor 23 is provided between the expander 12 and the condenser 13 in the circulation flow path 15 , and detects the pressure of the working medium discharged from the expander 12 . The condenser side temperature sensor 24 is provided in the supply flow path 18 and detects the temperature of the cooling medium supplied to the condenser 13 . T...

no. 3 approach ）

[0079] while referring to Figure 9 and Figure 10 A second embodiment of the present invention will be described. In addition, also in this third embodiment, only the parts different from those of the first embodiment will be described, and the description of the same configuration, operations, and effects as those of the first embodiment will be omitted.

[0080] The power generator of the present embodiment includes a discharge-side pressure sensor 23 and a condenser-side temperature sensor 24 in addition to the suction-side pressure sensor 21 and the evaporator-side temperature sensor 22 of the first embodiment. In addition, the discharge-side pressure sensor 23 and the condenser-side temperature sensor 24 are the same as those described in the second embodiment.

[0081]In the present embodiment, the upper limit correction unit 35 corrects the upper limit based on both the values ​​detected by the suction side detection mechanisms 21 and 22 and the values ​​detected by ...

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Abstract

The invention provides a power generation device. The power generation device comprises an evaporator (11) which evaporates an action medium, an expansion machine (12) which is rotationally driven by the expansion energy of the action medium, a condenser (13) which condenses the action medium, a circulating pump (14) which conveys the action medium to the evaporator (11), a generator (16), suction side detection mechanisms (21 and 22) which can detect used values in the calculation of the state quantity of the action medium flowing into the expansion machine (12), a control part (31) which controls the rotation speed of the expansion machine (12) according to electric power requirements of a device (40) supplied with electric power generated by the generator (16) within the upper limit value, an upper limit value correction part (35), which corrects the upper limit value and keeps the upper limit value to rise within the maximum value along decrease of the values detected by the suction side detection mechanisms (21 and 22). Through the structure, the electric energy production of the generator can be changed to meet the electric power requirements of a device connected with the generator.

Description

technical field [0001] The present invention relates to a power generation device utilizing a Rankine cycle. Background technique [0002] Conventionally, there is known a power generation device that recovers exhaust heat from various facilities such as factories, and generates power using energy of the recovered exhaust heat. Japanese Unexamined Patent Publication No. 60-144594 discloses a binary power generation device among such power generation devices, that is, a power generation device utilizing a Rankine cycle in which a working medium with a low boiling point is circulated for driving an expander. This power generation device includes an evaporator for evaporating a working medium, an expander including a rotor rotationally driven by the expansion energy of the working medium evaporated by the evaporator, a condenser for condensing the working medium discharged from the expander, and A circulation pump that sends the working medium condensed by the evaporator to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K25/10F01C20/08
CPCY02E20/14
Inventor 壶井升
Owner KOBE STEEL LTD