JPS60255A - Collection and reservation of solar heat energy - Google Patents

Abstract

PURPOSE:To collect the solar light energy as strain energy or the solar light energy of long wave length zone as sensitive heat energy and reserve it as heat to utilize it by utilizing the substance of isomerization reaction or the colored solution thereof as heat medium. CONSTITUTION:The heat medium of isomerized norbornadiene collects and accumulates the solar energy as strain energy or sensitive heat energy when it receives the solar light in a collector 1, and norbornadiene is changed into quadricyclen to reserve it in a reserving tank 2. The reserved heat medium is circulated through flow paths 11a, 11b, 11c, on the other hand, water is sent into a heat exchanger 4 for sensitive heat from the flow path 12a. According to this method, the water absorbs the sensitive energy and is heated, further, enters into a catalyst heat exchanger 3 for reverse reaction through the flow path 12b and is heated by discharged heat energy, discharged when quadricyclen returns norbornadiene by the reverse reaction, thereafter, is supplied to an utilizing side.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solar energy collection and storage method using an isomerization reactant.

Isomerization reaction substances such as norbornagene and anthracene undergo an isomerization reaction due to sunlight energy, store the sunlight energy as strain energy internally, return to the original molecular structure by a reverse reaction, and at the same time release the above strain energy. It is known that it has the property of emitting heat energy. For example, in the case of norbornadiene, the storage capacity is quite large, 240 Kcal/Kg, so a large amount of heat can be stored with a small amount of isomerization reactant, and in order to cause the above-mentioned reverse reaction, heating or Since it requires a catalyst such as Rh (NBD)2C12, Hg, etc., it is known that it is difficult to cause a reverse reaction under normal conditions and is advantageous for long-term heat storage.

However, in the isomerization reaction of the above-mentioned isomerization reaction substance, only light in a limited wavelength range of 0.5μ from the ultraviolet range of sunlight contributes. For example, in the case of norbornagen,
Only light in the wavelength range of 0.3μ or less is useful.

Therefore, the solar energy that can be used for the isomerization reaction of the isomerization reactant is based on light with a wavelength of 0.5 μ or less, and is only about 15% of the total solar energy.

As a result of various studies on a more efficient method of collecting solar energy using an isomerization reaction material, the present inventors have determined that the above-mentioned isomerization reaction material itself or the material dissolved in an organic solvent solution can be colored with a dye. We discovered that solar energy can be collected and stored more efficiently by doing this.

The present invention was made based on the above knowledge, and the isomerization reaction is caused by the energy of great sunlight, the solar energy is stored internally as strain energy, and the original molecular structure is returned to the original molecular structure by a reverse reaction, and at that time, the above strain is The isomerization of solar energy is carried out by using a colored solution obtained by dissolving a dye in an isomerization reaction substance that has the property of releasing energy as thermal energy or in an organic solvent solution in which the substance is dissolved as a heating medium. The present invention provides a method for collecting and storing solar energy, which is characterized by storing strain energy in a reactant and collecting and storing solar energy in a long wavelength range that cannot be absorbed by an isomerization reactant as sensible heat energy.

Hereinafter, the solar energy collection and storage method of the present invention having the above characteristics will be described in detail.

The isomerization reaction substance used in the present invention is not limited as long as it has the above-mentioned properties, but preferred specific examples include anthracene and norbornadiene.

Depending on the type, the isomerization reaction substance used in the present invention may be liquid due to the influence of contained impurities, etc.
When using a liquid substance for carrying out the present invention, an organic solvent is not necessary. However, below is an example of a case where an isomerization reaction substance that requires an organic solvent is used as the above-mentioned isomerization reaction substance. explain.

The isomerization reaction material is dissolved in an organic solvent to prepare an organic solvent solution of the isomerization reaction material. As this organic solvent, an inert solvent such as toluene is used, and it is preferable to adjust the concentration of the isomerization reaction substance to about 50% by weight or more. This is because a higher concentration is desirable. However, since the molten charcoal varies depending on the purity of the isomerization reaction substance, etc., it is necessary to prepare the charcoal in such a way that it does not interfere with its use as a heating medium.

A dye is dissolved in the organic solvent solution of the isomerization reaction material prepared as described above, and the solution is used as a colored solution.

The dye is not limited as long as it is soluble in the organic solvent and can sufficiently absorb sunlight in the long wavelength range that cannot be absorbed by the isomerization reaction substance, but preferred specific examples include Oil Peac'ock. B1ue+ (■SILAD CHEMICAL), Oil Fast Green (@SILAD CHEMICAL), Oil Orange ss (@SILAD CHEMICAL), Oil Redsst extra (@
Silad Chemistry), etc.

The amount of the dye used is preferably about 0.05 to 2% by weight based on the isomerization reaction material, and preferably about 0.05 to 1% by weight based on the organic solvent solution. This is because if the concentration is less than the above, the amount of sensible heat energy collected will decrease, and if the concentration exceeds the above, the efficiency of the isomerization reaction of the isomerization reaction substance will deteriorate, and the amount of strain energy stored will decrease.

Note that the order of dissolving the isomerization reaction substance and the dye may be reversed to the above, or both may be melted simultaneously. Also,
When using a liquid isomerization reaction substance, the amount of dye added may be determined according to the amount used above, and an organic solvent may also be used as necessary depending on the state of the liquid.

Therefore, the method for collecting and storing solar energy of the present invention collects and stores solar energy using the colored solution obtained as described above as a heating medium. Since it consists of a solution, when exposed to sunlight, the isomerization reactant undergoes an isomerization reaction, for example, norbornagene becomes quadricyclene, anthracene becomes dianthracene, and the energy of sunlight is stored in the isomerization reactant, and At the same time, since the heating medium is colored with the above-mentioned dye, it can collect and store solar energy in the long wavelength range that cannot be absorbed by the isomerization reaction material as sensible heat energy.

Next, the solar energy collection and storage method of the present invention will be described based on a preferred embodiment thereof, together with its heat dissipation method, with reference to the drawings.

FIG. 1 is a flow sheet showing an outline of an apparatus for carrying out the solar energy collection method of the present invention, in which 1 is a collector, 2 is a storage tank for a heat medium, 3 is a catalytic heat exchanger for reverse reaction, 4 is a heat exchanger for sensible heat; between the collector 1 and the storage tank 2, a circulation path for a heat medium is formed by channels 10a and 10b; and the reverse reaction catalyst heat exchanger 3, flow paths 11a, llb and I
A circulation path is formed by the lc so that the heat medium stored in the storage tank 2 can be taken out and circulated. Further, a bypass flow path lid connecting the flow paths 11b and llc is provided so that the heat medium can be circulated without passing through the reverse reaction catalyst heat exchanger 3 if necessary.

In addition, 12a is a heating medium (for example, water or air) that extracts energy from the heating medium by heat exchange with the heating medium in the sensible heat exchanger 4 and the reverse reaction catalytic heat exchanger 3. A flow path 12b is a flow path for sending the medium heated in the sensible heat exchanger 4 to the reverse reaction catalyst heat exchanger 3, and a flow path 12c is a flow path for sending the medium heated in the reverse reaction catalyst heat exchanger 3. This is a channel that supplies a medium (in the above case, hot water or hot air) to the user side.

In addition, when the isomerization reaction material that has undergone an isomerization reaction due to solar energy and undergoes a structural change passes through the reverse reaction catalytic heat exchanger 3, the isomerization reaction material is converted back to its original state through a reverse reaction using a catalyst. This is to allow the thermal energy generated by the reverse reaction to be exchanged with the medium.

Next, the effects of the above-mentioned apparatus will be explained in the case where water is heated using norbornadiene as the isomerization reactant.

When the heat medium (colored solution) receives sunlight in the collector 1, it collects the solar energy as strain energy and sensible heat energy as described above, and stores it in the storage tank 2 in the form of norbornagene changed to quadricyclene. be done.

Thus, the stored heat medium is transferred to the flow paths 11a, llb, 1
1c is circulated, and water is sent from the flow path 12a to the sensible heat exchanger 4. In the sensible heat heat exchanger 4, the water becomes sensible in the heat medium due to heat exchange between the heat medium and the water. It absorbs thermal energy and is heated, and then enters the reverse reaction catalyst heat exchanger 3 through the flow path 12b, where the thermal energy released when the quadricyclene in the heating medium returns to norbornadiene through the reverse reaction. is further heated by heat exchange, and the flow path 1
Water from 2a becomes hot water and is supplied to the user side from flow path 12c.

In addition, if the heating medium has a sufficient amount of sensible heat energy and the amount of heat exchange required by the medium to be heated is low, the heating medium is passed through the bypass flow path lid as appropriate to release the catalyst heat for the reverse reaction. Heat exchange in the exchanger 3 can be omitted, and in this case, switching to the bypass flow path lid can be automatically performed by temperature sensing.

As described above, the solar energy collection and storage method of the present invention uses a colored solution obtained by coloring an isomerization reaction substance or an organic solvent solution containing the substance with a dye as a heat medium, thereby converting solar energy into the isomerization process. In addition to storing strain energy within the reactant, it is also able to collect and store solar energy in the long wavelength range that cannot be absorbed by the isomerization reactant as sensible heat energy, so only the isomerization reaction of the isomerization reactant is possible. This method has extremely high heat collection and storage efficiency compared to conventional methods that collect solar energy as sensible heat energy.

Examples of the present invention are shown below.

Example: Using the colored solution obtained from Ill as a heating medium,
When heat was collected using the apparatus shown in FIG. 1, the following results (amount of heat collected) were obtained.

・Preparation of coloring solution 100g of norbornadiene is dissolved in 100g of toluene, and Oil FastGree is added to this as a dye.
A colored solution was obtained by dissolving 0.1 gi of n (@Silado Chemical).

Heat Collection Wind The control shows the amount of heat collected when a solution prepared by dissolving norbornagene and not colored with a dye is used as the heat medium in the above-mentioned colored solution manufactured by m.

From the above results, it can be seen that by using a heating medium in which the isomerization reaction material is colored with a dye, the amount of heat collected can be increased approximately three times as compared to when a non-colored heating medium is used. I understand.

[Brief explanation of the drawing]

FIG. 1 is a flow sheet outlining an example of an apparatus used to carry out the present invention. 1... Collector 2... Heat storage tank 3... Catalyst heat exchanger for reverse reaction 4... Heat exchanger for sensible heat

Claims (1)

[Claims] An isomerization reaction that causes an isomerization reaction using sunlight energy, stores the sunlight energy internally as strain energy, returns to the original molecular structure by a reverse reaction, and at the same time releases the strain energy as heat energy. By using a colored solution obtained by dissolving a dye in the substance itself or in an organic solvent solution in which the substance is dissolved as a heating medium, sunlight energy is stored as strain energy in the isomerization reaction substance, and isomerization is A solar energy heat collection and storage method characterized by collecting and storing sunlight energy in a long wavelength range that cannot be absorbed by chemical reaction substances as sensible heat energy.