JPS613952A - Heat accumulating device operated by photo-energy preserving compound - Google Patents

Abstract

PURPOSE:To permit efficient heat accumulation by a method wherein the photo- enengy preserving compound is exposed to the projection of solar light energy in a heat accumulating pool having concentration difference greenhouse effect. CONSTITUTION:A heat accumulating pool 1 is provided with a constant concentration solution layer 2 of the photo-energy preserving compound (norbornadien, for example) and a non-convection layer 3, formed above the solution of said compound, and a heat exchanger 9 is communicated with the constant concentration solution layer 2 through a catalyst column 8 while the flow path of the constant concentration solution is provided with a circulating pump device 6. The photo-energy preserving compound is exposed to the projection of solar light energy in the heat accumulating pool having concentration difference greenhouse effect, therefore, the density of heat, retrieved by the photo-energy preserving compound, is improved from the density of reaction heat of exothermal internal isomerization reaction of said compound alone into the summarized density of said reaction heat and the retrieved heat commensurate to the temperature increase in the heat accumulating pool 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heat storage device using a light energy storage compound, and more particularly to a heat storage device using a light energy storage compound using a heat storage pool having a non-convection layer.

BACKGROUND OF THE INVENTION In recent years, research and development on the direct use of solar heat and solar thermal power generation for the purpose of energy conservation have been widely conducted, and in particular, interest in solar energy storage to cope with fluctuations in solar radiation has increased. One possible method is to convert solar energy into -H electrical energy and then store it in a storage battery, but this method requires a fairly large storage battery, self-discharge of the storage battery is unavoidable, and When energy is used as another form of energy, there are drawbacks such as unavoidable duplication of conversion losses.

It is also possible to store solar energy in a heat storage body with a large heat capacity, but this also has drawbacks such as the size of the heat storage body becoming large and heat loss during long-term heat storage being unavoidable. be.

As a solution to the above-mentioned drawbacks of the prior art, the present inventors focused on light energy M-storage compounds that undergo internal isomerization reactions. An example of this compound is the article 1 of the magazine "Energy" June 1986 issue, pages 91-93.
Norbornagene is described in No. 59-37315 and other documents. Norbornagene absorbs large and S light energy and undergoes a valence isomerization reaction to become its valence isomer, γ-dolycyclane. Quadricyclane is a stable iris that can store heat semi-permanently. Not only is it possible to do this, but it can also be preheated by contact with a very small amount of a catalyst such as silver, and then returned to norbornadiene. That is, norbornadiene is a light energy storage compound capable of stably repeating heat storage and heat release through a reversible valence isomerization reaction with quadricyclane. Furthermore, according to the above-mentioned magazine "Energy" article, norbornagen is 92 c
It has the ability to store energy at a rate of al/g. Nordernasien,! The general formula of L bis derivatives is (1)
The general formula of quadricyclane and its derivatives is expressed as (
2) It is shown in the formula.

R,R.

[In the formula, RI + R2+ Ra'+ Ra + R5
and R6 represent a hydrogen atom, a lower alkyl group or an aryl group, and R7 and R8 represent a hydrogen atom, a group -CN or a group -COOR9 (wherein R9 represents a lower 7'alkyl group). ] [Type 1 Oki R,l + R'l!
+R2+R4, R5, R, +R1 and R8 have the same - meaning as the corresponding symbols in (1). ] In addition to norbornagene, acetylin is a light energy storage compound. Several types of compounds are known, such as Go.

When these compounds are exposed to sunlight energy, they undergo energy-endoring reversible internal isomerization reactions such as the valence isomerization reactions described above.

The high-strain compounds such as the above-mentioned valence isomers store light energy, and when the high-strain compounds come into contact with strain relief catalysts such as silver, phthalocyanine metal complexes, and porphyrin metal complexes, an exothermic reaction occurs and the original light energy is stored. The stored energy is released when returning to the sapphire compound. Therefore, in principle, by recovering the energy stored in the high strain compound through the exothermic reaction, it can be used as a heat source for heating or for a Freon turbine for power generation. Conceivable.

However, if we try to put this principle into practical use, for example, 50% of norbornadiene as a light energy storage compound.
When considering an aqueous solution, the density of recovered heat is expected to be approximately 46 cal/g, according to the above magazine "Energy" article.
This compares to approximately 8,500 ca, j/g or more of imported oil for power generation. ζThermal density is too low. For technology development?
Even if the recovery heat density of the upper part of the heat exchanger is slightly improved in the future, it is expected that equipment such as a light energy storage compound aqueous solution tank and a heat exchanger will become larger in order to put it into practical use as a heat extractor. - Problem to be solved by the invention Therefore, the problem to be solved by the present invention is that when heat is recovered from a highly strained compound in which a light energy storage compound is internally isomerized by sunlight irradiation, It grows at a point where the density of heat is low.

In order to solve the above problems, we have developed a light energy system according to the present invention.
A heat storage device in a storage system includes a heat storage pool having a layer of a constant concentration aqueous solution of a light energy storage compound and a non-convection layer formed above the aqueous solution, and a layer of the constant concentration aqueous solution connected to the layer through a catalyst column. A means is used consisting of a combination of a heat exchanger and a circulation pump device arranged in the flow path of the constant concentration aqueous solution.

The non-convection layer of the heat storage pool mentioned above is the lower part! It has a structure of high concentration and low density at the top, and even when it is irradiated with solar energy, it does not cause convection due to the difference in density above and below, and is radiated from the lower solution with higher concentration. The heat rays are reflected by the lower concentration of the upper molten ridge. This phenomenon is...
This is known as the concentration difference greenhouse effect or the salt field effect.

When solar energy is irradiated onto a heat storage pool formed by forming a constant concentration aqueous solution layer of a light energy storage compound under this non-convection layer, the violet I-rays that reach the bottom layer of the heat storage pool
As the internal isomerization reaction progresses in the constant concentration aqueous solution layer of the optical energy storage compound, the constant concentration aqueous solution layer is heated and its temperature increases by visible light or the like. Furthermore, since the heat rays emitted from the constant concentration aqueous solution layer whose temperature has increased are reflected from the non-convection layer, the constant concentration aqueous solution layer of the optical energy storage compound is efficiently heated. Generally, the higher the temperature of the solvent, the easier it is for the solute to dissolve, so that a concentration gradient and a temperature gradient between the upper and lower layers of the heat storage pool are maintained at the same time.

Therefore, the light energy storage compound aqueous solution sent to the heat exchanger via the catalyst column by the circulation pump is not only the recovered heat from the high strain compound due to the exothermic internal isomerization reaction, but also the heat recovered from the concentration difference chamber. Recovered heat commensurate with the temperature rise caused by the effect is also given to the heat medium such as Freon. That is, according to the present invention, the density of the heat recovered from the light energy storage compound is determined from the density of only the reaction heat of the exothermic internal isomerization reaction of the high strain compound 9, and the density of the heat of reaction and the concentration difference greenhouse effect. The density is improved to the sum of the recovered heat commensurate with the temperature rise due to

An embodiment of the present invention will be described with reference to FIG. The heat storage pool 1 has a constant concentration aqueous solution layer 2 of a light energy storage compound formed at the bottom and a non-convection layer 3 above it. As described above, the non-convection N2 has a configuration in which the lower part thereof is high concentration and high density and the upper part thereof is low concentration and low density. A circulation pump 6 is connected to one end 4 of the constant concentration aqueous solution layer 2 via a valve 5 . This circulation pump 6 has the one end 4
The aqueous solution sucked in from the aqueous solution layer is passed through a catalyst column 8 comprising a catalyst 7 and a heat exchanger 9 to the other end 10 of the constant concentration aqueous solution layer 2.
A constant concentration aqueous solution of a light energy storage compound is circulated between the heat storage pool 1 and the heat exchanger 9 as shown by arrow A.

The heat exchanger 9 has a heat-medium pump 11 and a valve 12 for the heat medium, such as Freon, to increase the concentration of the aqueous solution of the light energy storage compound while it travels from its population 9a to its outlet 9b. Heat is recovered into a heat medium such as Freon.

Separation/addition tank 13 shown in dotted line in Figure 1 as required.
is placed between the circulation pump 6 and the catalyst column 7, and in this tank 13, the highly strained compounds after absorbing heat are separated and extracted, and the light energy storage compound before absorbing heat is added to remove the highly strained compounds from the apparatus of the present invention. It is also possible to add the accumulated or separately accumulated heat-absorbed highly strained compound to this tank 13 to recover the separately accumulated heat.

To explain the action of the illustrated embodiment, the present inventor has discovered that the temperature of the constant concentration aqueous solution layer 2 of the light energy storage compound at the bottom of the thermal storage boot with the non-convection layer 3 reaches 50°C even near Tokyo. This was discovered through experiments. When the temperature of the aqueous solution from 50° C. can be lowered to 20° C. by the heat exchanger 9, the density of sensible heat recovered from the aqueous solution is 30 cal/g. At this time, assuming that the density of the heat recovered by the exothermic internal isomerization reaction from the highly strained compound after endothermic absorption contained in the 50% aqueous solution of the light energy storage compound is 46 cal/g as described above, this light The heat density recovered from a 50% aqueous solution of energy storage compound is improved by about 65% from 46 cal/g to 76 cal/g.

DETAILED DESCRIPTION OF THE INVENTION As described in detail, the heat storage device using a light energy storage compound according to the present invention exposes the light energy storage compound to solar energy irradiation in a heat storage pool having a concentration differential greenhouse effect, so that the light energy storage compound is recovered by the light energy storage compound. The heat density of the light energy storage compound is improved from the density of the reaction heat of the exothermic internal isomerization reaction of the light energy storage compound to the density of the sum of the reaction heat and the recovered heat commensurate with the temperature rise in the heat storage pool. It has a remarkable effect.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a heat storage device using a light energy storage compound of the present invention. 1. Heat storage pool, 2. Constant concentration aqueous solution layer, 3.
・Non-convection layer, 4... One end, 5.12... Valve, 6...
・Circulation pump, 7...Catalyst, 8...Catalyst column, 9
...Heat exchanger, lO...Other end, 11...Heat medium pump.

Claims (1)

[Claims] A heat storage pool having a constant concentration aqueous solution layer of a light energy storage compound and a non-convection layer formed above the aqueous solution, a heat exchanger communicating with the constant concentration aqueous solution layer via a catalyst column, and the constant concentration aqueous solution. A heat storage device using a light energy storage compound, comprising a circulation pump device provided in a flow path.