FR2819651A1 - Equipment for producing solar electricity, comprises emitting, regulating and receiving electrodes housed under vacuum in a glass bulb which is located within a conical solar concentrator - Google Patents

Abstract

A central receiving electrode (4) with cooling space (15) is supplied with electrons by a concentric emitting electrode (3) with an oxide inner surface and black outer surface. The current is regulated by an intermediate spiral electrode (5) and all three electrodes are contained within an evacuated glass bulb (1). The glass bulb is heated by solar energy derived from a conical concentrator which partially encloses it

Description

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- The present invention relates to a system for producing an electric current, based on a concentration of solar radiation, acting on a set of electrodes placed in a glass envelope, in which an air vacuum is created. Figure (1/2)
The electrodes are emitting for one, in the form of a cylinder (3/1) which is brought to an optimal temperature (1000 to 3000 Kelvin) depending on the pure metal used. It will be placed in a solar concentration (2/1 or 2/2) or in a form of mixed concentration. The electrode (4/1) receives and collects the flow of electrons emitted by the electrode (3/1).

 Between these two electrodes is housed an electrode (5/1) in the form of a metallic spiral which is used to regulate the flow of electrons.

 These different electrodes (3/1), (4/1), and (5/1) are connected to positive electrical voltages for (4/1), negative for (3/1), and adjustable negative for (5 / 1).

 The optimum temperature rise of the electrode (3/1) by the concentration of the sun's rays allows it to become an emitter of electrons which are attracted by the electrode (4/1). The intermediate electrode (5/1) is used to regulate the flow of these electrons.

 A current flows through the field of the electrodes (3/1) (5/1) and is collected on the electrode (4/1).

 The solar energy released by concentration on the electrode (3/1) is thus transformed into an electric current.

 All of these electrodes (20/2) housed in a glass envelope, are placed in a concentration medium (18/2) or (19/2) cone at 90 'or half-sphere.

 A support (16/2) of the reflector and electrode assembly is fitted to a mechanically driven system in order to maintain the assembly (20/2) in the extension of the solar radiation.

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 The accompanying drawings illustrate the invention. The figure (1/1) represents in section, all of the electrodes placed in a glass envelope. The electrode (3/1) made of pure metal and of cylindrical shape is coated on the outside with a layer of black metal oxide in order to favor the reception of the solar concentration. In its inner part is applied a layer of emissive oxide. This electrode (3/1) is held in a glass envelope (1/1) by supports (6/1) and (7/1) 'made of thermal and electrical insulating material of the mica type.

 Heated to an optimal temperature, this electrode (3/1) becomes an electron emitter.

 Inside the cylinder (3/1) is housed another metal cylinder (4/1) closed in its upper part and welded, at its base (14/1) to a cylindrical tube (13/1) open in its upper part. Between the cylinders (3/1) and (4/1) is maintained a vacuum (15/1) which allows a circulation of electrically nonconductive fluid which allows cooling.

1 L'entrée et la sortie du fluide se font par les embouchures (8/1) et (9/1). The electrode (4/1) receives the flow of electrons.

1 The fluid enters and exits through the mouths (8/1) and (9/1).

 The electrodes (3/1) and (4/1) are connected to positive voltages for the first, and negative for the second by contact rods (10/1) and (12/1).

 Between the electrodes (3/1) and (4/1) there is inserted an electrode in the form of a metallic spiral (5/1) connected to a contact rod (11/1) to which an adjustable negative voltage is applied.

 All. of these electrodes (3/1) (4/1) and (5/1) is placed in a glass envelope (1/1) in which an air vacuum is created. The electric current flowing through the electrodes (3/1), (5/1) and (4/1) depends on the voltage applied to the terminals (10/1) (12/1) and (11/1), and the temperature of the emissive electrode (3/1).

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 - In all cases, the parameters of these elements allow the restitution in electric current of the solar energy deployed on the emissive electrode (3/1).

 The set of electrodes (20/2) enclosed in the glass envelope represented by the figure (2/2) is placed in a medium of concentration figure (2/1) and (2/2).

 The support (16/2) is intended to be mechanically driven in order to maintain the assembly (20 /) in the extension of the solar radiation.

Claims (4)

1) Apparatus producing electric current characterized by a solar concentration by cone at 90 (18/2) or half-sphere (19/2) acting on a cylindrical electron-emitting electrode made of pure metal, (3il) coated with black metal oxide on its outer part and emissive oxide on its inner part, brought to an optimal temperature by solar radiation 2) Apparatus according to claim 1, characterized in that it comprises a receiving electrode (4/1) of the electrons emitted by the emitting electrode (3/1) and an electrode (5/1) serving to regulate the flow d electrons, which we place in a glass envelope (1/1) in which we create a vacuum (2/1).  3) Apparatus according to claim 2, characterized in that the receptive electrode (4/1) consists of a cylinder closed at its upper part in which a tube (13/1) is placed open in its upper part, and closed by welding (14/1) on the cylinder (4/1) in its lower part. The space (15/1) between the cylinder (4/1) and the tube (13/1) allowing the circulation of a fluid through the inlets and outlets (8/1) and (9/1), which serves to cool the receiving electrode (4/1).  4) Apparatus according to claims 1 to 3, characterized by the transformation of solar heat energy, concentrated on a set of electrodes under vacuum, into electric current corresponding to the energy deployed on the emissive electrode (3/1), and that the assembly is placed on a support (16/1) adapted to maintain it in the extension of the solar radiation.