JPS6243077A - Power generating system - Google Patents

Abstract

PURPOSE:To make energy consumption efficient by storing surplus electric power by converting electric energy into chemical energy and generating electric power when it is in short supply. CONSTITUTION:An oxygen ion conductive solid electrolyte 2 is accommodated in a reaction container 1, and electrodes 3, 3 are arranged on both sides of the solid electrolyte 2. When electric power is in surplus supply in the night for example, surplus electric power 4 is stored in such a way that electric energy is converted into chemical energy by performing chemical reaction of carbon dioxide to carbon monoxide with the surplus electric power and storing the carbon monoxide. When electric power is in short supply in the day time, chemical energy is converted into electric energy by using carbon monoxide stored as fuel of fuel cell to obtain electric power. Thereby, energy consumption is made efficient.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention I relates to a power generation system that converts electrical energy into chemical energy and stores electricity.

(Conventional technology) In conventional power generation systems, electricity generated at nuclear power plants or thermal power plants is sent to consumers and consumed there.Due to the characteristics of electricity, production and consumption occur at the same time. Since it is difficult to greatly change the R capacity of the power generation equipment, the current situation is that electricity production is carried out according to the maximum demand.For example, even in the daily cycle, the electricity demand is Even though there is much electricity during the day and less at night, the production plan must be adjusted to the maximum demand during the day.As a result, a considerable amount of electricity will be left over at night.Therefore, IM l is Efforts are being made to encourage its use by making it cheaper, and to physically store electricity through the construction of pumped-storage power plants.

Problems to be Solved by the Invention) The present invention has been made in consideration of the above circumstances, and provides a new power generation system that can store surplus power and generate power when there is a high demand for power, thereby reducing energy consumption. This is an attempt to improve efficiency.

(Means for solving problems) The power generation system of the present invention houses a solid electrolyte.

Using a reactor, carbon dioxide is converted to carbon monoxide when there is a surplus of electricity, and carbon monoxide is used as fuel when there is a shortage of electricity.74
At the same time, carbon monoxide and carbon dioxide are stored and recycled.

(Function) According to such a power generation system, when there is a surplus of power, such as at night, the surplus power is used to perform a chemical reaction from carbon dioxide to carbon monoxide, and this -carbon oxide is stored, thereby generating electrical energy. can be converted into chemical energy and stored as electricity. On the other hand, when there is a power shortage, such as during the daytime, chemical energy can be converted into electrical energy and generated by the action of a fuel cell that uses stored carbon monoxide as fuel. Therefore, energy consumption can be made more efficient.

(Example) Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2.

1 and 2, a reactor 1 houses an oxygen ion conductive solid electrolyte 2. As shown in FIGS.

N electrodes 3.3 are attached to both sides of the solid electrolyte 2, respectively.

When there is surplus power, such as at night, surplus power 4 is applied between the electrodes 3 and 3 as shown in FIG. supplying stored carbon dioxide. This carbon dioxide is electrolyzed and becomes 1/20 of CO.
2. Howl. The generated oxygen passes through the solid electrolyte 2 as ions and is separated to the other side of the solid electrolyte 12. Also,
Carbon monoxide converted from carbon dioxide is discharged from one side of the solid electrolyte 2 to the outside of the reactor 1 and stored in a gas holder (not shown) or a container filled with a carbon monoxide adsorbent (such as zeolite). .

On the other hand, when there is a power shortage such as during the day, a load 5 is connected between the electrodes 3 and 3 as shown in FIG. 2, and carbon monoxide is supplied from a storage container to one side of the solid electrolyte 2. Oxygen (or air) is supplied to the other side of the solid electrolyte "Ii2. Oxygen moves in the solid electrolyte 2 as ions, reacts with carbon monoxide on one side of the solid electrolyte 2, and is converted to carbon dioxide. At this time, power generation is performed as a fuel cell.The carbon dioxide is discharged from one side of the solid electrolyte 2 to the outside of the reactor 1 and stored.

In this way, conversion between electrical energy and chemical energy becomes easy, and efficiency in energy consumption can be achieved.

Actually, chemical reaction and power generation tests were conducted using the apparatus shown in FIGS. 1 and 2. In this test, zirconium oxide containing 8 mol % of yttrium oxide as a solid solution was molded into a 30 square square piece with a thickness of 1 inch and was used as the solid electrolyte 2, and the inside of the reactor 1 was maintained at 1000°C.

First, the chemical reaction starts with a carbon dioxide flow rate of 30 d/min.
The air flow rate was 30 d/min, and 1. O
The test was carried out by applying a voltage of V. As a result, it was detected that the carbon dioxide flowing out from reactor 1 on the carbon dioxide side contained 20% carbon monoxide, indicating that a conversion reaction from carbon dioxide to carbon monoxide was occurring. .

Next, in the power generation test, the carbon monoxide flow rate was set at 10 ai'/min.
The test was carried out by setting the air flow rate to 30 m/min, connecting the electrodes 3 and 3 with lead wires, and checking the electromotive force (voltage) and current. As a result, the electromotive force was 1.03V and the current was 500mA, confirming that power was being generated as a function of the fuel cell.

Furthermore, it was confirmed that the gas discharged from the reactor 1 on the -carbon oxide side was carbon dioxide.

(Effects) As detailed above, the power generation system of the present invention utilizes the conversion of electrical energy and chemical energy to store electricity when there is a surplus of electricity and to generate electricity when there is a shortage of electricity, thereby improving the efficiency of energy consumption. It is achievable.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing the operation of the power generation system in an embodiment of the present invention when there is a surplus of power, and FIG. 2 is an explanatory diagram showing the operation of the power generation system when there is a power shortage. 1... Reactor, 2... Solid electrolyte, 3... M pole,
4... Surplus power, 5... Load. Applicant Sub-Agent Patent Attorney Takehiko Suzue (See Figure 2)

Claims (1)

[Claims] Using a reactor containing a solid electrolyte, it converts carbon dioxide into carbon monoxide when there is a surplus of electricity, and when there is a shortage of electricity, it uses carbon monoxide as fuel to generate electricity and generate carbon dioxide.
A power generation system characterized by storing and recycling each of the carbon monoxide and carbon dioxide.