JP2527832B2 - Solar energy concentrator / heat collector - Google Patents

Description

TECHNICAL FIELD The present invention relates to a solar energy collecting / collecting device for effectively collecting sunlight in a system utilizing the light / heat energy of the sun. Is.

(Prior art) A fixed type that is not a sun-tracking type is desired for consumer use in a light collecting / collecting device, and it is easy to use a sloped roof surface as a reflector and the reflected light is overlapped with the direct light on the collecting / collecting surface. Or let
The heat collecting surface was attached to the wall surface, etc., and in order to reduce the structure protrusion, a device such as a frame housing having a short depth reflection bottom surface in accordance with summer sunlight reflection was attached.

(Problems to be solved by the invention) However, for example, in the former example in which a heat collector is placed near the roof ridge and is facing south, the sloped roof surface is an upward slope when viewed from the direction of the sunlight path, so the collection of reflected light The incidence rate on the light / heat collecting surface remained low, and the reflectance of the reflector (roof surface) could not be kept high due to the exposure of the outside air, and the light collecting performance was insufficient.

Also, in the frame type with a short reflection floor by directly attaching a light collector / heat collector to the wall surface, etc., it is gathered for a short reflection floor at a high sun altitude in summer, but at a low sun altitude in winter. light·
The amount of light flux reflected on the heat collecting surface was insufficient, and the heat collecting performance was also insufficient.

In addition, if the heat collection temperature is set high for winter heating, the absorbed energy flow density F _abs is not high, so the flow rate must be extremely narrowed, and the decrease in the flow velocity in the pipe and the long pipe lead to a significant heat loss from the pipe. Also, long pipes exposed to the outside were often caused by freezing damage in the early morning of the severe winter when the heating was most needed.

In addition, in the summer when the altitude of the sun is high and heating is not required, there is no choice but to be accompanied by economic and procedural disadvantages such as the need for a device to dissipate excess heat.

From these facts, the fact is that the heating system cannot endure the load of a large-area heat collector or the like and has not been put into practical use.

The present invention is intended to eliminate these conventional drawbacks, and significantly enhances the amount of heat collection, particularly efficiently and easily collects the solar energy flow that is fading in the winter period, and
It is designed to be economically and conservatively applicable to hot water supply.

(Means for Solving the Problem) The present invention is directed to a light-transmitting plate that transmits sunlight, a heat collector having a heat collector that receives sunlight that passes through the light-transmitting plate, and a reflector that reflects the heat. In a frame type solar energy concentrating and heat collecting device consisting of an upward fixed reflector plate that can emit light,
The reflecting floor has a downward slope angle of half or less of the sun altitude angle at noon near winter in the traveling direction of the sunlight, and the reflected light sufficiently irradiates the light collecting / collecting body, and the reflecting floor surface and the transparent plate. The problem is solved by facing the light collecting / collecting body at a spread angle with an open surface.

The present invention relates to a light transmissive plate that transmits sunlight, a light collector / collector having a light collector / heat collector that transmits sunlight through the light transmissive plate, and the light collector / collector. In a frame-type solar energy collector / collector consisting of an upward fixed reflective floor capable of irradiating reflected light, the reflective floor is a downward slope angle of half or less of the solar altitude angle at noon near winter in the traveling direction of sunlight. Have a
At the north end of the reflecting floor, the south surface of the light collecting / collecting body has a tilt angle in the direction of the sun toward the sun within a range of less than twice the downward inclination angle of the reflecting floor from the vertical surface, and direct light and reflection The incidence rates of both light fluxes on the light collecting / collecting body are kept substantially the same,
In addition, there is a solar energy collecting / collecting device in which the reflecting floor has a reflecting area capable of sufficiently irradiating the condensing / collecting body with the reflected light on the entire reflecting floor at noon near winter. .

Still another object of the present invention is that the fixed reflection floor faces the light-transmitting plate and the light-collecting / collecting body at an open spread angle, and the solar altitude becomes high. Part of the solar light flux transmitted through the plate is reflected by the reflective floor,
The incident angle of the re-reflected light, which is reflected on the rear surface of the transparent plate and then enters the light collecting / collecting body, is wider than the incident angle on the rear surface of the transparent plate. It is characterized in that the reflectivity at the back surface is improved by increasing only twice the divergence angle so that effective addition of the re-reflected light to the condenser / collector can be performed. Solar energy collection
To provide a heat collecting device.

(Operation) In the solar energy collecting / collecting device of the present invention, direct sunlight reaches through the light transmitting body 1 such as glass and reaches the collecting / collecting body 3 directly. Adjacent to the reflected light reaching the light collecting / collecting body after being reflected by the downward gradient reflecting floor, and further adjacent to this, what is reflected by the downward gradient reflecting floor is effective on the rear surface 1'of the light-transmitting body. The re-reflected components that are re-reflected and reach the light collecting / collecting body 3 are effectively summed, so that the amount of collected heat is significantly improved and can be economically used.

(Embodiment) An embodiment of the present invention will be described with reference to FIGS. 1 to 12. In FIG. 1, a transparent plate 1 that transmits sunlight and a condenser / heat collector 3 that transmits the transparent plate and receives sunlight. And an upward fixed reflection floor 2 capable of irradiating the light collecting / collecting body with reflected light, and a solar energy collecting body comprising the light collecting / collecting body 3 facing the reflection floor to the north end at the north end thereof. In the heat collecting device, the translucent plate 1 is installed so as to cover and seal the fixed reflective floor and the light collecting / collecting body, and the fixed reflective floor 2 collects together with the translucent plate 1. It faces the light / heat collector 3 with an open spread angle, and the reflective floor has a downward slope angle less than half of the solar altitude angle at noon near winter in the traveling direction of sunlight, and is further designed. Combine the entire surface of the reflective floor at noon near the winter of the point with the area where the reflected light can sufficiently irradiate the light collecting / collecting body. It has not.

In this case, the fixed reflection floor 2 is the sunlight transmissive plate 1.
Along with the light collecting / collecting body 3, the light collecting / collecting body 3 has an inclination angle within 2 times the reflection floor inclination angle from the vertical to the south side ( It is effective to make the heat collecting surface and the normal line have a tilt angle in the direction of the sun.

In the figure, 4 is a frame chamber, 5 is a water supply pump, 6 and 6'are headers, 7 is a drainage channel, and 8 is a building.

Looking at the optical path S of the reflection reaching, it is assumed that the incident angle to the reflecting floor surface at the zenith angle Z of the sun (the complement of the sun altitude angle) in FIG. (Z
+ Δ), the reflection angle is the same, but for the vertical line (Z
+ 2δ).

Now, suppose that the light collecting / collecting body is tilted to the south side by ν angle from the vertical line and is facing south, and the incident rate of reflected light on the collecting / collecting body μ _R (the angle between the ray and the normal of the surface is cos θ
Is expressed as μ _R = cos θ = sin (Z + 2δ−ν), which is 2δ from sin (Z−ν) when the reflection floor is horizontal.
The incident rate is improved by that much.

Further, when the reflecting floor and the light collecting / collecting body are at a right angle, δ = ν, and μ _R = sin (Z + δ), that is, the incident rate μ _S of the direct light reaches.

Next, in the optical path S ₁ of the re-reflected light shown in FIG. 3, when the inclination angle of the translucent glass surface is ψ, the incident angle of the sunlight reflected on the reflective floor surface to the glass back surface is (Z + 2δ + ψ). Therefore, it is larger than (Z + ψ) in the case of the horizontal reflection floor by 2δ.

The incident angle of sunlight on the transparent glass surface is (Z-ψ)
Therefore, the incident angle on the rear surface of the glass is always larger than the incident angle on the front surface by 2 (δ + ψ). For this reason, for example, in FIG. 4, δ9 ° and ψ13 ° are taken at noon on January 22. The incident angle to the surface is 42 °, and the transmittance τ = 87%, which is a good translucent material. The incident angle of the reflected light on the back surface is 2 (δ +
ψ) is added to reach 86 °, and the back surface reflectance reaches 76%.

That is, at this time, the shielding translucent glass plate becomes a good translucent body against the sunlight from the outside, and acts as a good reflector against the re-reflected light once entering the frame.

In addition to this, the re-reflected light path reflected on the back surface of the translucent glass is reflected at an angle of (Z + 2δ + 2ψ) with respect to the vertical perpendicular, and the incidence rate on the light collecting / collecting body with the inclination angle ν is sin
It increases with (Z + 2δ + 2ψ + ν).

As described above, the re-reflected reflected light and the incident light reflectivity of the re-reflected reflected light and the glass surface, which is the translucent body, are configured to have a wide spread angle with respect to the light collecting / collecting body. The synergistic effect of improvement works to increase the absorbed energy flow of the light collector / collector.

As described above, assuming that the light collecting / collecting body is at a right angle to the reflecting floor surface, the incidence rate μ of the direct light and the reflected light to the light collecting / collecting body is both sin (Z + δ), Let τ be the transmittance of the translucent body
When the reflectance of the reflective floor is represented by R, the design method is designed so that the reflected light from the entire surface of the reflective floor is exactly incident on the light collector / collector at winter noon. If the energy flow density on the surface of the plane when the line is oriented toward the sun is F _N , the total energy flow density F _SR of the reflected light of the direct light is F _SR = [τ (1 + R) sin (Z + δ) ] × F _N = Φ × F _N [W /
m ² ] This Φ should also be called the energy acquisition coefficient, and the total incident energy flow of direct and reflected light to the condenser / heat collector in this frame is the same area of the same area of non-concentration without the light-transmitting plate. It shows how many times the inflowing energy flow when the normal is directed to the sun.

The inclination angle ψ of the light-transmitting transparent plate 1 is ψ = 90 °-(Z + 2δ) from the design condition that the reflected light of the entire surface of the reflecting floor 2 is incident on the light collecting / collecting body 3 at noon near winter in no time. ) Is established, the solar zenith angle Z at noon near the winter of the region is known. Therefore, if the downward slope reflection floor angle δ is given, ψ is calculated, and from the relationship between Z and ψ to the translucent plate 1. The incident angle θ _I (= Z−ψ) of sunlight is obtained, the transmittance τ is obtained from the glass characteristic curve in FIG. 4, and the incident angle to the reflecting floor surface is (Z + δ).
Then, the reflectance R is obtained from the figure.

If it is assumed that τ and R do not change even if δ is changed, Φ, that is, F _SR should be maximized at (Z + δ) → 90 °. However, in reality, when this state is approached, the condition that the reflected light from the entire surface of the reflective floor illuminates the light collector / collector sufficiently is maintained, so the reflective floor extends infinitely and The glass surface of is parallel to the sunlight and its incident angle is 90 °,
From FIG. 4, the transmittance τ is 0 and sunlight does not enter the frame.

Therefore, τ, R, etc. must be treated as changing, taking into consideration the relationship between sunlight-shielding transparent glass plates, etc. Calculating the Φ values for various δ in the Tokyo area, at noon near the winter, as shown in FIG. 7, δ = 9 °, ψ = 13
The maximum value of Φ = 1.50 is obtained at °.

Thus, from the latitude of the installation location of this device, the solar altitude angle at noon near the winter solstice can be obtained, and the total energy flow of the direct luminous flux and the reflected luminous flux incident on the heat collector should be maximized. A desired form can be specified.

If δ is further increased, as shown in FIG. 7, the reduction rate of the optical efficiency is large, and the facility cost is disadvantageously increased because the reflective floor and the area of the transparent glass for shielding are unnecessarily extended.

Therefore, from these facts, it is desirable that the slope angle of the downward slope reflective floor be less than half the solar altitude angle at noon near the design point in the winter.

When δ is made slightly smaller than the maximum value of Φ, the optical efficiency gradually decreases, but the burden of equipment cost is lightened, and a practical compromise can be found.

Figure 8 shows the energy flow density of each direct light at noon of the year.
The above totals are also shown in Fig. 11 for the purpose of comparison, comparing the performance of a general flat plate collector with a mounting angle of 55 ° and the same horizontal reflector floor frame type with no downward slope. As can be seen from the figure, the downward slope reflection floor 2 and the light-shielding transparent glass plate 1 face the light collecting / collecting body at an open spread angle (δ + ψ), which leads to a period during which the winter solstice hits a severe winter season. The glass backside reflection that effectively shields the re-reflected light effectively alives the year's maximum energy flow density, and as a result, a much higher energy flow density can be obtained compared to the general flat plate type. It has come to be seen that it can be put to practical use.

On the other hand, when the sun's altitude becomes higher (Z is smaller), as shown in Fig. 1, the part adjacent to the re-reflected part and hitting the back surface of the glass is again reflected by the reflecting floor before being collected and collected. The amount of multiple reflections (re-reflected reflections) that appears on the surface appears, but at that time, Z is small and therefore the incident angle is small, so the reflectance on the back surface of the glass is reduced and the light flux after the re-reflected light is reduced. Almost dissipated into the atmosphere again,
Since the incident rate of the reflected light flux on the heat collecting / collecting body also decreases, the overall energy flow density decreases as shown in Fig. 11 when the heating is not required. It is possible to obtain energy acquisition along the demand curve of real life without need.

In addition, since the uniform direct light, reflected light, and re-reflected light are superposed on the light collecting surface, the combined light also becomes a relatively uniform light collecting surface, which is convenient for various uses.

The above is the case where the heat collector is attached to the reflecting floor at a right angle, and the inclination angle with respect to the vertical perpendicular is equal to the inclination angle δ of the descending slope reflecting floor, but in addition to this, for example, as shown in FIG. Increasing the angle to 45 ° improves the incidence rate of direct rays as shown in the figure when Z is as small as 15 ° in summer, but the reflected light cannot enter the heat collecting surface and the net absorption is overall. This is the case when the energy flow density F _abs is reduced. Therefore, it is not a good idea to make the tilt angle excessive.

Fig. 6 shows the results of examinations by mounting the collector on the downward slope reflection floor angle δ by changing the inclination angle ν of the heat collector. Ν = δ even in two periods when the solar altitude is significantly different
The peak value is obtained at, and as shown in the figure, the collector tilt angle ν
Is preferably in the range of ν = 0 to ν = 2δ in the vertical plane,
In this embodiment, ν = δ is set, but if it is desired to increase summer acquisition, it is close to ν = 2δ, and in the opposite case, it is close to ν = 0.

The down-gradient reflective floor itself is not limited to a single-gradient single reflective floor, and various modifications can be applied. For example, although not shown in the drawing, by forming the reflecting floor as a pillar surface with a parabolic conductor, the reflected light can be well concentrated on the heat collecting / collecting body at the time and time of design.

However, when it goes beyond the design point, the situation changes and becomes inefficient.

In particular, when such a curved surface is adopted, not only the cost and cost problem but also the downward slope angle of the reflecting floor of the heat collector is difficult to be taken, and in some cases the upward slope may occur, and the summer zenith angle Z is small. Reduce the incidence rate of the season. Also, since the irradiation of the reflected light to the heat collector is for a large area, optical rigor is not required, and the reflective floor can be replaced by a block-like collection of different reflective planes, but the above problems are avoided. I can't.

In addition, as a convenient means when the solar zenith angle decreases in the summer and the incidence rate of direct / reflected light decreases, and re-reflected light also weakens and the expected thinness occurs, one or more slope angles on the reflecting floor surface. It is also possible to displace a movable reflector (not shown) capable of changing the temperature so that the reflected light can be effectively delivered to the heat collector at this time.

Next, the frame-type light collecting / collecting mechanism of the present invention may be a roof-embedded type, but in that case, in order to prevent accidental breakage of the covering roof glass, etc., the reflective floor is waterproofed and placed, and It is absolutely necessary to provide a drainage ditch as shown in FIG. 1 at the end of the slope and guide it to the outside so that it can become a second roof in case of emergency.

In Fig. 9, a frame type collector / collector with a downward gradient of a reflective floor and a horizontal reflective floor with a non-downward gradient is drawn for comparison. Comparing the received light intensity at winter midday, which is the lowest, as shown in the figure, the horizontal floor is 33.7% more than that of the downward slope reflective floor.
There are also many. In other words, since it receives much light and the heat collecting surface has the same area, the horizontal floor type should have a higher heat collecting rate by the same proportion if the light collecting and heat collecting efficiencies are equal, but the actual result is Appears with the opposite result.

One of the reasons is that the incidence of reflected light, re-reflected light, and multi-reflected light on the light collector / collector is significantly improved due to the existence of the downward-gradient reflecting floor angle δ. .

Another reason is that the downward-gradient reflecting floor and the shielding glass surface are combined and face each other at the spreading angle open to the light collecting / collecting body.

The angle of incidence of the re-reflected light on the back surface of the shielding glass is larger by 2δ than that of the horizontal type, and therefore the reflectance of the glass surface is significantly improved.

Figure 10 compares the re-reflectance on February 7 for each sample in the sense of a sample. As can be seen, at noon the down-slope reflective floor is about 2.6 times the horizontal type. The effect is particularly great in the winter when re-reflected light enters.

Fig. 11 shows the comparison of the energy flow at noon of the year due to the direct light from the above. The horizontal axis shows the moon, and the vertical axis shows the net absorbed energy flow density per unit area of the front surface of the collector / collector.
It has the F _abs [W / m ² ].

In addition to the light collector / collector A according to the embodiment of the present invention, a horizontal reflective floor frame type collector B of the same shape and a flat plate collector C, which is commonly used and is arranged independently, are suitable for collecting heat in winter. A tilted mounting angle of 55 ° is included for comparison.

This heat collector C is arranged for the winter season,
Unavoidable to fall near the summer solstice occurs has, F _abs stops below 1000W / m ² even during winter peak. The horizontal floor collector B has seen its peak at the winter solstice, and it has been over 1500W / m ² for more than a month. On the other hand, the depression near the summer solstice was also severe, and it is even lower than that of the 55 ° flat plate type.

Contrary to this, in the downward gradient reflective floor frame type light collector / collector A of the embodiment of the present invention, the value is higher than both of the above two examples over the years.

In particular, it is of great practical significance that a net absorbed energy flow density of 1500 W / m ² or more can be secured over a wide winter period (6 months) from autumn to spring. Of these, the most noticeable is the fact that the net absorbed energy flow density reaches a peak from late January to the end of February, which is the midwinter, reaching approximately 1650 W / m ² , which makes it useful for both heating and hot water in winter. It supports the fact that it can be transformed.

In addition, regarding the obtained curve, it is natural that the content of the absorbed energy flow in the winter solstice is mostly direct and reflected, but at that time, it is higher than that of the horizontal floor collector B. Is largely due to the amount of direct / reflected light and the improvement of the incidence rate.

At the same time, the re-reflecting enthusiastically participated strongly as mentioned above, and the excitement in the two mountains increased. The slight difference in elevation between the two mountains is due to the seasonal factors that improve the atmospheric transmittance of sunlight during the cold season in February.

Near the summer solstice, re-reflected light and multiple-reflected light come in, but because Z is small and the reflectance on the glass surface is low, the dissipation to the outside is large and the incidence rate of direct and reflected light is also small.
Eventually, the sum of these will be a small value, which is the main reason why a large amount of heat is dissipated in the summer. Also, at this time, the most powerful effect is the amount of reflection from the foot of the heat collector, and the improvement of the incidence rate due to the downward gradient reflecting floor is greatly effective. This is higher than the value of the horizontal reflective floor type in the summer, and is the main reason for surpassing the 55 ° mounting flat type.

The heat collecting medium may be liquid (for example, water) or gas (for example, air), and heat is collected by heat transfer from the heat collecting body to the heat medium.

Although the reflective floor is treated as a completely flat surface in the embodiments, it is difficult in practice, and some unevenness of the surface and slight unevenness of the reflective surface cause scattered / diverged light in the reflected light.
Looking at the individual diffused light, it corresponds to the regular reflected light in which the azimuth angle Z of the sun is deviated, and since it is condensed as it is, even if there are some irregularities etc. However, it may even be a little useful for uniform light collection in the light collector / heat collector.

The above is the scattering / diffusing light of the light reflected by the reflective floor, but the light group from the sun's periphery, that is, the light scattered and diffused by the clouds around the sun and reaching the ground is completely similar. Can be explained as a phenomenon.

That is, light from around the sun, for example, near the zenith corresponds to when the Z of the sun becomes smaller, and light from a place at a lower altitude than the sun corresponds to when Z becomes large. The light from around the east and west is collected as it is when the azimuth angle of the sun changes, so it is properly collected in each case. It is natural that it has a light-collecting property, and experiments have shown that it has a light-collecting property comparable to direct light. Even if the direct light falls due to the haze of the sun and thin clouds,
Since most of the fallen light is transformed into scattered light, it means that if the scattered / diffused light can be collected, the fallen amount of the direct light of the sun can be supplemented and covered.

In Japan, it is overwhelmingly accompanied by some clouds even on a sunny day, and it can be said that this is a useful feature in view of the fact that the specific gravity of scattered light is relatively large.

Fig. 12 is an example of installation in the building 8 of a flat roof building, but only the light-transmitting glass plate 1 and the condenser / collector cover 13 are exposed, and the pipes are completely exposed to the outside. Since the piping is only in the frame room and the light is condensed, the length of the tube is short, the heat loss from the piping is extremely limited and it is very useful for heat collection, and it is practical from the viewpoint of freeze prevention, cost and maintenance. Is also advantageous. In addition, the appearance of the building is not impaired, and wind damage such as a typhoon that may be a concern when the flat type is lined up on the roof can be minimized.

As a matter related to the reduction of heat loss, the reflection loss of sunlight on the reflective floor is converted into heat. If the back surface of the reflector of the reflective floor is well insulated, this heat loss is almost transmitted to the air in the frame, the temperature of the air in the frame rises, and heat dissipation from the light collector / collector is suppressed. work. This function tends to be especially promoted in the summer when the sun is high.

(Effects of the Invention) As described above, the present invention provides a significantly higher net absorbed energy flow per unit area in the winter period than in the conventional flat plate collector arrangement, and only direct light is obtained. It also exhibits good light collection performance for scattered and diffused light, and can collect light with a simple and inexpensive structure for large area light collectors and heat collectors, and does not require a heat removal device in summer and is homogeneous. Since it is focused, the practical range of solar energy is wide, and in addition,
It has great practical effects, such as good harmony with the building and easy maintenance.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view in which each direct light flux and optical path are shown together in the main part of the embodiment of the present invention. FIG. 2 is a diagram showing an optical path of reflected light in the device of the present invention. FIG. 3 is a diagram showing the optical path of the re-reflected light in the device of the present invention. FIG. 4 is a view showing an example of the optical characteristics of the light-shielding transparent glass plate and the reflecting floor in the device of the present invention. FIG. 5 is a diagram showing a strong inclined collector and an optical path in the device of the present invention. FIG. 6 is a diagram showing an example of changes in the inclination angle of the heat collector and the direct energy flow density in the device of the present invention. FIG. 7 is a characteristic diagram showing the relationship between the downslope reflective floor angle δ and the acquired energy coefficient Φ at winter midday in the device of the present invention. FIG. 8 is an example diagram of an incident energy flow density curve of each direct light at each noon of each moon of a down-gradient reflective floor frame type in the device of the present invention. FIG. 9 is a diagram comparing the light receiving examples of the gradient reflecting floor type of the present invention and the conventional horizontal reflecting floor type of the same shape. FIG. 10 is a diagram showing an example in which the reflectances of re-reflected light of the downward slope reflective floor type of the present invention and the conventional same-shaped horizontal reflective floor type are compared. FIG. 11 is a diagram showing an example of an incident energy flow density curve of total direct light of various types of devices of the present invention for each month of the year. FIG. 12 is an external appearance diagram in which the present invention is installed in a flat roof building. 1 ... Transparent plate 2 ... Reflecting floor 3 ... Concentrating / collecting body 4 ... Frame chamber 5 ... Pump 6,6 ... Header 7 ... Drainage 8 ... Building 13 ... Concentrating / Heat collector cover

Claims (2)

(57) [Claims] 1. A light-transmitting plate that transmits sunlight, a light-collecting / collecting body having a light-collecting / collecting body that transmits the light-transmitting plate and receives the sun, and the light-collecting / collecting body. In a frame-type solar energy concentrator / collector consisting of an upward fixed reflective floor that can irradiate reflected light, the reflective floor is a downward slope of half or less of the solar altitude angle at noon near winter in the direction of sunlight. Have horns,
At the north end of the reflecting floor, the light collecting / collecting body faces the south with the normal of the surface having a tilt angle in the direction of the sun in the range of not more than twice the downward inclination angle of the reflecting floor from the vertical surface and direct light. The incident rates of both light fluxes of the reflected light and the reflected light on the light collecting / collecting body are kept to be substantially the same, and the reflected light on the entire surface of the reflecting floor at noon near winter is condensed as described above.・ Having a reflection area that can irradiate the heat collector sufficiently, it is proportional to the sum of the transmittance of the translucent plate and the synergistic value of the incident rates of the direct light and the reflected light entering the light collector / collector. An energy concentrating / heat collecting device characterized by increasing the total energy flow density. 2. The fixed reflection floor faces the light collecting plate and the heat collecting body together with the light-transmitting plate at an open spread angle, and a part of the solar light flux transmitted through the light-transmitting plate due to an increase in the altitude of the sun. Is reflected by the reflective floor, reflected again by the rear surface of the transparent plate, and then incident on the rear surface of the transparent plate, which is the angle of incidence of re-reflected light that enters the condenser / heat collector. By increasing the angle of incidence by 2 times the open spread angle, the reflectance at the back surface is improved, and effective addition of re-reflected light to the condenser / collector can be performed. A frame type solar energy collecting / collecting device comprising the transparent plate, the fixed reflecting floor, and the collecting / collecting body.