JPS6287762A - Cooler collecting solar heat - Google Patents

Abstract

PURPOSE:To provide an inexpensive and high-performance cooler collecting solar heat by a method wherein a vacuum layer is provided so as to be neighbored to an adsorbent arranged in a sealed vessel while a water retaining section for preventing the flow-down of medium liquid, condensed and liquefied by cooling, when the heat collecting cooler is installed in a inclined posture, is provided so as to be neighbored to the vacuum layer. CONSTITUTION:A transparent body 1, permeating solar light and restraining convection, is consisting of the glass 1A of low iron content and a fluorine plastic series acid and weather resistant film 1B. A heat collecting body 2 absorbs the solar light and transfers the heat of the solar light to an adsorbent layer 3. Tubes 2A or water paths are provided i the heat collecting body 2 and are sued to collect solar heat when the adsorbent layer 3 is cooled at night and room cooling is not necessitated during daytime. The adsorbent layer 3 is provided with metallic performed plates 4 for transferring heat from the heat collecting body 2 and supporting an external pressure accompanied by evacuation. The heat collecting body 2 and the adsorbent layer 3 are provided with a pipeline (for water or air) for cooling or heat collecting and a heat pipe. A water retaining section 7 keeps refrigerant (water) so as not to flow down it when the cooler is inclined. The water retaining section 7 is constituted of glass wool in this embodiment. A cooling plate 8 cools and condensates the vapor of refrigerant upon reproducing it and evaporates the liquid of refrigerant upon cooling a room.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an intermittent-operating sealed adsorption solar heat collector cooler, and more specifically, the present invention relates to an intermittent-operating sealed adsorption solar collector cooler, and more specifically, to improving cooling and heating conversion performance, improving installation ease,
This invention relates to a solar heat collector cooler whose internal structure has been optimized to increase the effective heat collection area and reduce manufacturing costs by simplifying the configuration.

[Conventional technology]

Conventionally, intermittent-operating closed adsorption solar heat collection cooling systems that use water as a medium and phosphor gel or zeolite as an adsorbent have attracted attention because of their relatively simple structure and high theoretical conversion efficiency. For example, as shown in FIG.
2, the evaporation/condensation section 53 is connected to the piping 54, and the heat collection/regeneration/adsorption section 51 and the evaporation/condensation section 53 are arranged at an angle, or as shown in FIG. It is known that the adsorption section 51 and the evaporation/condensation section 53 are arranged in one exterior housing.

[The problem that the invention attempts to solve]

However, since all of the above methods require connecting two vacuum vessels, the cost is high, the pressure loss associated with vapor movement is large, and the evaporation/condensation area cannot be large enough, so the conversion efficiency (coefficient of performance) is low. This has the disadvantage that it is much lower than the theoretical value, and since the solar radiation from the evaporation/condensation portion cannot be used, there is a disadvantage that the cooling output per installation area is small.

Therefore, the present invention has a technical problem of solving the drawbacks of the prior art and providing a solar heat collector cooler that is cheaper and has higher performance than the conventional solar cooling system that combines a solar heat collector and an absorption refrigerator. do.

[Means for solving problems]

The present inventor has made extensive studies to solve the above problems, and as a result, has arrived at the present invention.

That is, the solar heat collector cooler according to the present invention is covered with a transparent body that transmits sunlight and suppresses convective heat loss, the surface of which is painted black or selectively absorbed, and is housed in an evacuated airtight container. By placing an adsorbent that has adsorbed a medium on a part of the tank, and regenerating it by heating it from the outside surface using solar heat during the day, the generated medium vapor is cooled by using a cooling pipe from outside.
By condensing and liquefying and accumulating in another part of the same sealed container, and cooling the above adsorbent from the outside after the nighttime sunlight has disappeared, the medium liquid is evaporated, cold heat is obtained, and the above-mentioned adsorbent is cooled as necessary. In an intermittent-operating sealed adsorption type solar heat collecting cooler that can collect solar heat using a cooling pipe, a vacuum layer is provided adjacent to the adsorbent disposed in the sealed container, and the vacuum layer It is characterized by providing a water retaining part adjacent to the medium liquid condensed and liquefied by cooling so that the liquid does not flow down even if the heat collecting cooler is installed at an angle.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic sectional view of main parts showing one embodiment of the present invention;
The figure is a schematic perspective view of the main parts same as the above, FIGS. 3 to 7 are schematic cross-sectional views of the main parts showing other embodiments of the present invention, and FIG. 8 is a cutaway front view of the main parts of the embodiment shown in FIG. 7. , FIG. 9 is a temperature-moisture content diagram illustrating the operating state of the solar heat collecting cooler according to the present invention.

In FIGS. 1 and 2, reference numeral 1 denotes a transmitting body that transmits sunlight and suppresses convection, and is composed of a low-iron glass IA and a fluororesin acid-resistant weather-resistant film IB. The glass IA is preferably an ordinary glass having a thickness of 1 to 5 mm, and the film IB preferably has a thickness of 5 to 30 mm. Note that the film IB does not necessarily need to be provided, and in that case, the transparent body I is composed only of the glass IA (see FIGS. 3, 5, and 6).

2 is a heat collector, which plays the role of absorbing sunlight and transmitting the heat to the adsorbent layer 3. The heat collector 2 is preferably a seam-welded stainless steel plate, but its shape, material, etc. are not particularly limited. The shape of the heat collector 2 is shown in FIGS. 5 and 6.
As shown in the figure, it may simply be a plate made of stainless steel, or as shown in Figures 1 to 3, the tube 2A may be provided between two stainless steel sheets at a predetermined interval. Furthermore, as shown in FIG. 4, a stainless steel sheet may be provided on the tube 2A. Although the surface of the heat collector 2 may be painted black, it is preferable to use a selective plate film.

The tube 2A provided in the heat collector 2 is a water channel,
It is used to cool the adsorbent layer 3 at night and to collect solar heat during the daytime during the non-cooling period.

As the adsorbent 11!3, a medium such as silica gel or zeolite that adsorbs water or fluorocarbon is used, and in this embodiment, silica gel is used. The amount of granular silica gel used in the adsorbent layer 3 is not particularly limited, but
Preferably 9 to 10 to 25 per 1 m” of effective heat collecting area,
More preferably, it is 15 to 20 to 9.

The adsorbent layer 3 is provided with a metal perforated folded plate 4 to support heat transfer from the heat collector 2 and external pressure caused by vacuum.

The material of the perforated folded plate 4 is not particularly limited;
tzs (SLIS 304. SO33f6, etc.) is preferably used, and its shape is a lattice as shown in Fig. 2.
It is preferable to have a large number of holes on each side.

The heat collector 2 and the adsorbent layer 3 are provided with piping (for water and air) and heat pipes for cooling or heat collection.

5 is a stainless steel porous plate, 6 is a vacuum support, and the vacuum support 6 has heat insulation properties and pressure resistance (approx.
It only needs to have good air permeability, and for example, ceramic is preferable.

Reference numeral 7 denotes a water retaining part that retains water so that the refrigerant (water) does not flow down even when the water is tilted.
It consists of .

8 is a cooling plate that cools and condenses refrigerant vapor during regeneration and evaporates refrigerant liquid during cold g. Reference numeral 9 denotes a metal (for example, stainless steel) bellows that absorbs expansion and contraction of the closed container and reduces heat conduction. 10 is a heat insulating material (for example, expanded polystyrene, etc.), and 11 is an exterior casing.

In the above embodiments, the water retaining portion was formed into a layered structure using glass wool (see FIGS. 1 to 3), but the structure is not limited to this, and structures such as those shown in FIGS. 4 to 6 may also be used. It's okay. That is, Fig. 4 shows a case in which a weir plate is provided on the cooling plate B to form a water retention groove, Fig. 5 shows a case in which a pipe (tube) is used to form a water retention groove, and Fig. 6 shows a case in which a water retention groove is formed by using a pipe (tube). This figure shows a case where glass wool is interposed in the water retention groove shown in the figure.

In the above embodiments, the closed container is box-shaped, but if the container is in the form of a vacuum glass tube, there is a gap between the transparent body 1 and the heat collector 2, as shown in FIGS. 7 and 8. The structure is the same as the embodiment described above except that it is vacuum insulated and the above-mentioned parts are arranged concentrically. Note that in FIGS. 7 and 8, parts with the same reference numerals as in FIGS. 1 to 6 have the same names and are made of the same material, so their explanations will be omitted.

Next, an example of the operation of the heat collecting cooler shown in FIGS. 1 and 2 will be explained.

Adsorbent F! J3 was filled with 18 to 9 granular silica gel per 1 m'' of effective heat collection area, and after being thoroughly exhausted, a heat collection cooler in which 2.0 kg of distilled water (water content 11%) was injected as a refrigerant was exposed to direct sunlight in the summer. Install the cooling plate 8 tilted under the light.
When cooling water at 30°C is passed through the silica gel, as shown in Figure 9, the silica gel is first preheated by sensible heat from point A to point B.
When the water vapor pressure in the closed container reaches the saturated water vapor pressure corresponding to the temperature of the cooling plate, it is regenerated along the condensation temperature line in the figure.

During the day (afternoon), the silica gel reaches a zero point of approximately 2% water content and 117°C. During this time, the water condensed on the cooling plate 8 is retained in the water retaining portion 7.

After the sunlight has disappeared, when cooling water at 30°C is passed through the water channel of the heat collector 2, the silica gel is cooled from point 0 to point D, and adsorption begins.
The water in the water storage area evaporates and cools the cold water in the cooling plate, and by the morning the water content returns to 11%. During this time, approximately 1200 8℃ of cold water is generated per 1500 t of heat collecting area.
You will get kcal.

The above also applies to the vacuum glass tube type shown in FIGS. 7 and 8.

〔Effect of the invention〕

According to the present invention, it is possible to provide a system that is cheaper and has higher performance than the conventional solar cooling system that combines a solar heat collector and an absorption refrigerator.

Also, unlike conventional heat collection coolers, there is only one vacuum container, the entire surface can be effectively used as a heat collection surface, it can be installed at any angle, and the steam path is the shortest. What you can do, heat transfer area (evaporation/condensation area)
What is the effect of being able to achieve high performance at low cost by increasing the ?

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view of main parts showing one embodiment of the present invention;
The figure is a schematic perspective view of the main parts same as above, FIGS. 3 to 7 are schematic cross-sectional views of the main parts showing the embodiment of the pond of the present invention, and FIG. 8 is a cutaway front view of the main parts of the embodiment shown in FIG. 7. , FIG. 9 is a silica gel temperature-water content diagram illustrating the operating state of the solar heat collecting cooler according to the present invention, and FIGS. 10 and 11 are schematic explanatory diagrams showing conventional examples. In the figure, 1 is a permeable body, 2 is a heat collector, 3 is an adsorbent layer, 6 is a vacuum support, and 7 is a water retaining part. Patent Applicant 1) Shun Naka Yashiro Rihito Patent Attorney Nobuaki Sakaguchi 1 Figure 3 Figure 4 Room 2
Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] Covered with a transparent material that transmits sunlight and suppresses convective heat loss,
An adsorbent adsorbing the medium is placed in a part of the airtight container whose surface is painted black or treated with selective absorption, and which is evacuated.The adsorbent is heated and regenerated from the outer surface by solar heat during the day, and the generated medium is By cooling the steam using a cooling pipe from the outside, it condenses and liquefies in another part of the same sealed container.
By allowing the adsorbent to stagnate and cooling the adsorbent from the outside after the nighttime sunlight has disappeared, the medium liquid can be evaporated to obtain cold heat, and if necessary, solar heat can be collected using the cooling pipe. In an intermittent-operating closed adsorption type solar heat collecting cooler, a vacuum layer is provided adjacent to the adsorbent placed in the closed container, and the medium liquid condensed and liquefied by cooling is placed adjacent to the vacuum layer. A solar heat collection cooler characterized by providing a water retention part to prevent liquid from flowing down even if the heat collection cooler is installed at an angle.