JP5658201B2 - Power generation device using liquid air and liquid hydrogen - Google Patents

Description

  The present invention relates to a power generation apparatus using liquid air and liquid hydrogen.

  Conventionally, air is cooled and liquefied, stored at normal pressure, and when necessary, liquid air is heated to take out high-pressure air and drive the generator turbine and its generator to generate electricity. A power generation system is known (Patent Document 1).

JP-A-4-127850

  However, in Rankine cycle cold power generation, in order to surely liquefy and regenerate the vaporized air of the working fluid exhausted from the turbine for power generation with the liquid air of the refrigerant fluid, the cold energy tends to be insufficient.

  Therefore, an object of the present invention is to provide a power generation device that can reliably liquefy and regenerate the vaporized air of the working fluid exhausted at high speed from the power generation turbine by using liquid hydrogen as the refrigerant fluid.

Among the present inventions, the invention described in claim 1 is a Rankine cycle power generation system using cold energy, and is installed in a heating expansion chamber by using a high -temperature pump of working fluid with ultra-low temperature liquid air injected into the cold storage tank A. The vaporized air that is pumped to the heat exchange flow path of the metal heat storage element that has generated thermal energy by energizing the generated electrical energy, and heated and expanded, drives the power generation turbine and its generator at high speed, and the cold storage tank B Heat exchange with a heat exchanger that generates cryogenic cold energy by pumping the cryogenic liquid hydrogen injected into the heat pump into the heat exchange tube of the heat exchanger installed in the cooling condensing chamber using a high-pressure pump of refrigerant fluid Then, the low-temperature vaporized air exhausted from the power generation turbine is cooled and liquefied to ultra-low temperature liquid air, and the liquid air is sent back to the liquefied layer of the cold storage tank A by a pump. The ultra-low temperature vaporized hydrogen heated in the heat exchange tube by heat exchange with the low-temperature vaporized air is pumped to the expansion valve and liquefied in the vaporization layer of the cold storage tank B by the expansion pressure reduction / cooling action of the expansion valve It is characterized by a cycle in which low-temperature liquid hydrogen is sent back to the liquefied layer.

  The power generator according to claim 1 can reliably liquefy and regenerate the vaporized air of the working fluid exhausted at high speed.

It is explanatory drawing which shows the structure of a power generator. It is explanatory drawing which shows the structure of a electric power generating apparatus and each apparatus. It is explanatory drawing which shows.

  Hereinafter, an embodiment of power generation using liquid air and liquid hydrogen in the power generation apparatus of the present invention will be described in detail.

  In operating this power generator, the power supplied to the electrical circuit of each switch is started with the output from the battery (2) until the output from the generator (1) is generated. It is.

First, when liquid air of minus 190 ° C. is injected from the injection valve (5) of the cold storage tank A (6) equipped with the refrigerator A (3), the pressure regulating valve (4), and the injection valve (5). Then, switch (8) of refrigerator A is turned ON.
Next, the switch (28) of the metal heat storage body is turned on to generate heat energy by energizing the metal heat storage body (10) installed in the heating expansion chamber (9), and then the high pressure of the working fluid. Turn on pump switch (11). Then, liquid air of minus 190 ° C. is pumped to the heat exchange path (13) of the metal heat storage body (10) by the high pressure pump (12) of the working fluid. As a result, the vaporized air heated and expanded to 20 ° C. and 39 kg / cm ² drives the power generation turbine (14) and the generator (1) at high speed.

  Next, liquid hydrogen of minus 253 ° C. from the injection valve (17) of the cold storage tank B (19) equipped with the refrigerator B (15), the pressure regulating valve (16), the injection valve (17), and the expansion valve (18). Is turned on, the switch (20) of the refrigerator B is turned ON.

  After that, the switch (21) of the refrigerant fluid high-pressure pump is turned on, and the liquid hydrogen at minus 253 ° C. is supplied to the heat exchanger (24) installed in the cooling condensation chamber (23) by the refrigerant fluid high-pressure pump (22). Pump to heat exchange tube (25). As a result, the minus 80 ° C vaporized air exhausted from the power generation turbine (14) is cooled and liquefied to minus 190 ° C liquid air by heat exchange with the heat exchanger (24) that generates cryogenic energy. To do.

Then, the pump switch (26) is turned on, and the pump (27) sends liquid air back to the liquefied layer of the cold tank A (6), and the vaporized air of minus 80 ° C. exhausted from the power generation turbine (14). In the heat exchange with the heat exchange tube (25), hydrogen of minus 210 ° C. heated and vaporized is pumped to the expansion valve (18), and the expansion valve (18) is expanded, decompressed and cooled, A power generation apparatus using liquid air and liquid hydrogen is configured by a cycle in which liquid hydrogen of minus 253 ° C. liquefied in the vaporized layer of the cold storage tank B (19) is sent back to the liquefied layer.
For example, when the output from the generator (1) is 600 kW, the total output supplied from the inverter (29) to each switch is within 300 kW, and electricity necessary for the operation of this power generator is provided.

In the Rankine cycle power generation system using cold energy, the power generation device using liquid air and liquid hydrogen configured as described above is heated by a high-pressure pump of working fluid with ultra-low temperature liquid air injected into the cold storage tank A. Vaporized air that has been heated and expanded through heat exchange passages in a metal heat storage element that generates thermal energy by energizing electrical energy installed in the expansion chamber drives the generator turbine and its generator at high speed. , A cryogenic liquid hydrogen injected into the cold storage tank B is pumped by a refrigerant fluid high pressure pump to a heat exchange tube of a heat exchanger installed in the cooling condensing chamber to generate a cryogenic cooling energy A cycle in which low-temperature vaporized air exhausted from the turbine for power generation is cooled and liquefied into ultra-low-temperature liquid air and sent back to the liquefied layer of the cold storage tank A by a pump, By heat exchange with low-temperature vaporized air exhausted from the electric turbine, ultra-low-temperature vaporized hydrogen that has been heated in the heat exchange tube is pumped to the expansion valve, and the expansion tank is decompressed and cooled to vaporize the cold storage tank B By featuring a cycle in which cryogenic liquid hydrogen liquefied in the layer is sent back to the liquefied layer, the vaporized air of the working fluid exhausted at high speed can be reliably liquefied and regenerated.

  1 .... Generator, 2 .... Battery, 3 .... Refrigerator A, 4 .... Pressure regulating valve, 5 .... Injection valve, 6 .... Cold storage tank A, 8 .... Switch (refrigerator A), 9.・ Expansion chamber, 10 ・ ・ Metal regenerator, 11 ・ ・ Switch (high pressure pump for working fluid), 12 ・ ・ High pressure pump, 13 ・ ・ Heat exchange channel, 14 ・ ・ Generator turbine, 15 ・ ・ Refrigeration Machine B, 16 ... Pressure regulating valve, 17 ... Injection valve, 18 ... Expansion valve, 19 ... Cold tank B, 20 ... Switch (refrigerator B), 21 ... Switch (high pressure pump for refrigerant fluid) , 22 .. High pressure pump, 23 .. Cooling condensing chamber, 24 .. Heat exchanger, 25 .. Heat exchange tube, 26 .. Switch (pump), 27 .. Pump, 28 .. Switch (metal heat storage body) .

Claims (1)

In a Rankine cycle power generation system that uses cold energy, a metal heat storage system that generates heat energy by energizing electrical energy installed in a heating expansion chamber using ultra-low-temperature liquid air injected into the cold storage tank A with a high-pressure pump of working fluid The vaporized air that has been pumped to the heat exchange flow path of the body, heated and expanded, drives the generator turbine and its generator at high speed, and the cryogenic liquid hydrogen injected into the cold storage tank B is supplied by a high-pressure pump of refrigerant fluid. Then, the low-temperature vaporized air exhausted from the turbine for power generation is sent to the ultra-low temperature by heat exchange with the heat exchanger that generates cryogenic cold energy by pumping it to the heat exchange tube of the heat exchanger installed in the cooling condensation chamber. Heat exchange is achieved by heat exchange between the cycle that cools and liquefies to liquid air and sends the liquid air back to the liquefied layer of the cold storage tank A by a pump and the low-temperature vaporized air exhausted from the turbine for power generation. Features a cycle in which ultra-low-temperature vaporized hydrogen heated in the chamber is pumped to the expansion valve, and cryogenic liquid hydrogen liquefied in the vaporized layer of the cold storage tank B is sent back to the liquefied layer by the expansion decompression / cooling action of the expansion valve A power generation device using liquid air and liquid hydrogen.

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