KR101357110B1 - Regenerator structure for solar heat - Google Patents

Abstract

A hollow cylindrical type with a molded body and the heat storage tank, the storage tank and the storage tank is installed inside the main body of the internal space of the main body of the first and second chambers by a partition baffle and said heat storage tank installed in the main body to connect the solar panels a heat exchanger for collecting the hot water in the heat storage tank is supplied to the first chamber of the main body line and the heat storage, the hot water stored in the first chamber of the heat exchanger tube -exchange water exchange with the heat storage, wherein the baffle is installed at the top center of the first the difference in density in the chamber 1 is raised to a high temperature can be formed on the circumferential surface of the second chamber through a nozzle to discharge a high-temperature and sy pongwan, installed at one side of the baffle at the bottom of the second chamber is stored in the hot water the first chamber and discharged into a low-temperature pongwan sy, said second chamber connected to the main body of the heat storage tank installed in the density difference from the second chamber to said elevated temperature water is supplied to the absorption chiller refrigerant is used as a heat source plays an ever hot water supply pipe and said first chamber connected to the main body of the heat storage tank installed in the refrigerant in the absorption chiller used to play the hot water as a heat source to a hot water supply water exchange with the first chamber, including the water exchange tube characterized by a configuration as solar powered absorption type cooling and heating system provides a solar heat storage tank structure.

Description

Regenerator structure for solar heat in solar powered absorption cooling and heating systems

The present invention relates to a solar heat storage tank structure of a solar drive absorption cooling and heating system, and more particularly, to a solar heat storage tank structure of a solar drive absorption cooling and heating system that is optimized for the structure of the solar heat storage tank to enable efficient operation of the entire system. It is about.

For heating and cooling systems linked to solar collectors, Westinghouse Electric Co. of the United States in 1974 installed an absorption air-conditioning system in conjunction with solar collectors in Atlanta Georgia, using a 10,000 ft ² flat panel collector to produce 82 to 93 hot water. 10,000 Btu / day was obtained and 100ton absorption air conditioner was operated. The COP of this absorption air conditioner was about 0.6, and because of the low collector efficiency and the COP, about 20% of the solar heat is used for cooling.

 Solar-powered cooling technology has already been widely researched and commercialized in IEA participating countries, and in particular, research on solar-powered cooling systems has been carried out in Task 25 (Solar Assisted Air-Conditioning of Buildings) as part of IEA, Solar Heating & Cooling Programming. Through four subtasks, design tools and simulation programs for solar cooling systems were developed and demonstration projects were carried out in 11 countries including Austria, France and Germany. In particular, France and Germany have been successfully proved the performance of the absorption type cooling system using a vacuum tube solar collector. In 2004, the IEA "Solar Assisted Air-Conditioning in Buildings" handbook was published to introduce the performance and market economics of solar-powered air conditioning systems.

Absorption air conditioners have completed the development of high efficiency triple-use systems in Kawasaki, Japan, and are preparing to commercialize COP 1.6 products. In connection with this, high efficiency heat pipes, heat exchangers, high temperature regenerators, new cycles, and high temperature corrosion control technologies have been developed. In 2004, Japan Sanyo presented the world's highest level of COP 1.35 (in terms of low calorific value, also known as COP 1.5) in double-use.

In the case of China, products developed by independent technologies have been leading the market for a long time, and the company that occupies the top market in the Chinese market is 遠大 (Broad). Is 1.23, and the company is aggressively advancing into the US and European markets and recently introducing products to the Korean market. Shuangliang, a proprietary technology company competing with him, and Daisan Sanyo, a joint venture with Sanyo, Japan, are bringing COP 1.22 to the market.

In Korea, solar-driven cooling technology is a technology that can equalize loads by adding cooling functions to solar annual loads (hot water supply and heating), which is desperately needed in domestic conditions. Technology is urgent.

The expected capacity of solar-powered absorption air conditioners is 10,20,30 RT, which is relatively small. Currently, the products for these capacities have design and manufacturing technology, but the installation space and price competitiveness problem according to the device size It is not produced due to the problem of finding demand. In addition, many studies such as standardization of components and standardization of circuits of interconnection systems are needed for improving efficiency in solar-driven absorption air conditioners linked to solar heat, but research and development are still poor.

 In addition, when solar energy is sent to an absorption air conditioner regenerator when the solar collector and the absorption air conditioner are connected, there is a need for a circuit and a structure capable of efficiently accumulating and using solar energy having high variability depending on the amount of solar radiation, but there is no such technology development.

In the case of absorption chillers, the heat source required is relatively high, which is a technical challenge in the solar sector. In particular, the heat storage tank requires a different approach from the existing method in the structure and control method of the solar heat storage tank due to the system operating at a temperature (about 90 ° C) that is much higher than the existing general heat use range of 50 to 60 ° C. However, the technology for this part is also insufficient.

Therefore, the technical problem to be achieved by the present invention is to provide a solar heat storage tank structure of the solar drive absorption cooling, heating system to optimize the structure of the solar heat storage tank to enable efficient operation of the entire system.

The present invention for achieving the above object is in the solar heat storage tank structure of the solar-driven absorption-type cold, heating system to use the solar heat collected in the solar heat collecting plate as a heat source for regenerating the refrigerant of the absorption chiller, the hollow cylindrical type A heat storage tank body formed in the shape, a baffle installed inside the heat storage tank body and partitioning the internal space of the heat storage tank body into first and second chambers, and connected to the heat storage tank body, and heat exchanged with heat collected in the solar heat collecting plate. A heat storage supply pipe for supplying water to the first chamber of the heat storage tank body, a heat storage return pipe for returning hot water stored in the first chamber to the heat exchanger, and a density difference in the first chamber at a center of the upper end of the baffle. The rising hot water is discharged to the second chamber through the nozzle formed on the circumferential surface. A high temperature cyphon tube, a low temperature cyphon tube installed at one side of the bottom of the baffle and discharging hot water stored in the second chamber to the first chamber, and connected to a second chamber of the heat storage tank main body, are connected to the second chamber. Hot water supplied to the absorption chiller is supplied to the absorption chiller to be used as a heat source for regenerating the refrigerant to the absorption chiller and the first chamber of the heat storage tank body is installed, the high temperature used as a heat source for regenerating the refrigerant in the absorption chiller It characterized in that it comprises a hot water return pipe for returning the water to the first chamber.

A space for heating hot water in a solar heat storage tank is divided into first and second chambers, and only the hot water stored in the partitioned first chamber is heated to be used as a heat source for regenerating a refrigerant of an absorption type refrigerator. Compared with this, not only can shorten the time due to hot water heating but also increase the use efficiency of the heat source, thereby implementing the effect of efficient operation of the low body system.

1 is a solar thermal cooling, heating system according to the present invention.
Figure 2 is a view showing in detail the structure of the solar heat storage tank in the solar drive absorption cooling, heating system shown in FIG.
3A to 3C are views sequentially showing a heating situation of the heat storage tank body;

The present invention relates to the efficient use of solar heat storage tanks in absorption-cold, heater-linked solar cooling, heating systems.

In particular, in the case of a conventional solar cooling and heating system, in the case of heat storage, the entire heat storage tank is heated by connecting a solar circuit and a heat storage tank, which takes a long heating time. It is difficult to heat up to the effective temperature (90 ℃ in total), although the heat storage tank is a heat storage, but the utility of the energy is low. In order to solve this problem, some companies design the heat storage tank rather small in the initial design, but this is also the original technology because the heat storage is not enough and the system is overheated when the solar radiation is high and the load is low. It is hard to see. At night time, the heat storage tank needs to be heated again the next day due to heat loss of the heat storage tank itself. Therefore, it is unreasonable that it takes much time to supply hot water. Therefore, in the present invention, the same structure as the present invention was designed to efficiently use solar energy.

In the schematic structure of the present invention, the heat storage tank is provided with a baffle. The upper and lower chambers are separated by the baffle surface, and the lower chamber is primarily connected to pipes for solar heat storage so that solar heat energy is accumulated. It is a chamber. On the baffle surface, a cyphon tube for natural circulation is installed, and a high temperature cyphon tube and a low temperature cyphon tube are respectively installed. The high temperature cyphon tube is a long length of the cyphon tube extending up to the heat storage tank to induce hot water, and the low temperature cyphon tube is a short cyphon tube for low temperature inflow. These cyphon tubes are configured to circulate the hot water in the lower chamber by the top of the heat storage tank and the natural circulation principle, and another feature is nozzles at regular intervals on the side of the high temperature cyphon pipe to induce the stratification according to the temperature of the heat storage tank. This is installed, the end of the short cyphonic tube has a structure in which a nozzle for adjusting the circulation flow rate is installed.

That is, the driving mechanism of the solar heat storage tank having such a structure is the first step. First, energy collected in the solar heat collector is introduced into an independent chamber at the bottom of the heat storage tank to heat the lower chamber. At this time, compared to the existing system according to the size of the lower chamber, the existing system heats the entire heat storage tank, so that much time is required, but this system is heated several times faster. The lower chamber, which is initially heated by the solar cycle, has high temperature water, and thus, a difference in density from the upper low temperature water occurs.

In the second stage, a high temperature low density water is led to the upper part of the heat storage tank through a cyphon tube connected to the fleece, and a density circulation occurs in which the high density water at the lower part moves to the lower chamber, so that the top layer of the heat storage tank is rapidly heated to a high temperature.

The third and final stage is a mechanism of heating the heat storage tank gradually from top to bottom as the circulation continues and the density circulation is made by a mechanism that gradually heats up to the bottom of the heat storage tank.

Hereinafter, the solar heat storage tank structure of the solar-driven absorption cooling and heating system according to the present invention will be described in detail with reference to one embodiment.

1 is a schematic diagram of a solar cooling and heating system according to the present invention.

As shown in FIG. 1, the solar heat collector 100, the heat exchanger 200, the solar heat storage tank 300, the absorption refrigerator 400, and a cooling tower are configured. The absorption chiller system uses the principle that water (refrigerant) in the evaporator is evaporated under vacuum pressure of 6.5 mmH 2 O (saturation temperature 5 ° C.) and the evaporated refrigerant vapor is absorbed by the LiBr aqueous solution in the absorber. In this process, as much heat as the latent heat of evaporation of the refrigerant is taken out of the cold water, the temperature of the cold water is reduced to enable cooling. Such solar-driven absorption type cooling and heating systems typically use medium temperature water (about 90 ° C.) (high temperature water) produced by heat-exchanging solar heat collected in a solar heat collecting plate 100 to a heat exchanger 200 of the absorption chiller 300. Medium temperature water (high temperature water) is mainly used to transfer the refrigerant to the regenerator. Recently, some companies have been developing single- and dual-effect hybrid absorption refrigeration systems by connecting solar thermal systems to direct-type dual-effect absorption refrigeration systems. In any case, an important factor in the solar-driven absorption cooling and heating system is hot water supplied from the solar heat storage tank 300 to the absorption refrigerator 400. How fast hot water is produced and sent is one of the important technical factors of solar cooling and heating system. This temperature varies the efficiency of the overall system and significantly changes the performance of the freezer.

Therefore, the present invention is to optimize the structure of the solar heat storage tank 300 in the solar drive absorption type cooling, heating system to enable efficient operation of the entire system. In other words, the present invention has a technical gist of the invention in view of the high efficiency structure of the solar heat storage tank linked solar heat storage system.

2 is a view showing the structure of the solar heat storage tank in the solar-driven absorption cooling and heating system shown in FIG.

As shown in FIG. 2, the solar heat storage tank 300 of the solar-driven absorption-type cooling and heating system of the present invention uses heat collected in the solar heat collecting plate 100 as a heat source for regenerating a refrigerant of the absorption refrigerator 400. The heat storage tank main body 10, the baffle 12, the high temperature cyphon tube 18, and the low temperature cyphon tube 22 are comprised largely.

The heat storage tank body 10 is a hollow cylindrical type, the first and second chambers 14 and 16 are partitioned up and down, respectively, with the baffles 12 interposed therebetween.

Hot water is stored in the first and second chambers 14 and 16.

The heat storage tank body 10 is provided with a heat storage supply pipe 24, a heat storage return pipe 26, a hot water supply pipe 28 and a hot water supply return pipe 30, respectively.

The heat storage supply pipe 24 and the heat storage return pipe 26 circulate the hot water generated through the heat exchange process with solar heat to the second chamber 14 of the heat storage tank body 10 so that the first heat storage tank body 10 is first. It is a means for heating the hot water stored in the chamber 14 to a high temperature.

The heat storage supply pipe 24 and the heat storage return pipe 26 are connected to the solar heat collecting plate 100 and the heat exchanger 200, and the heat storage is performed using the solar heat collected by the solar heat collecting plate 100 as an energy source. The hot water circulating through the supply pipe 24 and the heat storage return pipe 26 is heat-exchanged with hot water.

That is, the hot water heat exchanged through the heat exchanger 200 is supplied to the first chamber 14 through the heat storage supply pipe 24, wherein the supplied hot water is stored in the first chamber 14. In the process of heating the hot water, the hot water having a high temperature due to the difference in density due to the convection phenomenon rises through the hot siphon tube 18 of the baffle 12 and opens the nozzle 20 formed in the hot siphon tube 18. Through the second chamber 16 is discharged. The hot water stored in the second chamber 16 has a temperature lower than that of the hot water discharged through the nozzle 20 of the high temperature cyphonic tube 18 and thus the low temperature cyphonic tube 22 of the baffle 12. After descending and being discharged to the first chamber 14, the heat exchanger pipe 26 is heat-exchanged with the hot water through the heat exchanger 200 of the solar heat collecting plate 100 again to undergo a circulation process. .

The hot water supply pipe 28 is configured to be connected to the second chamber 16 of the heat storage tank body 10 and the hot water discharged to the second chamber 16 through the nozzle 20 of the high temperature cyphonic pipe 18. By using the difference in density ascending to the upper side of the second chamber 16 is supplied to the absorption chiller 400 is used as a heat source for regenerating the refrigerant.

The hot water supply and return pipe 30 is connected to the first chamber 14 of the heat storage tank body 10 and used as a heat source for regeneration of the refrigerant in the absorption chiller 300, and then the high temperature water whose temperature has fallen again. Return to the first chamber (14).

The baffle 12 is installed in the internal space of the heat storage tank main body 10 to partition the internal space of the heat storage tank main body 10 into the first and second chambers 14 and 16.

The high temperature cyphonic pipe 18 is connected to the vertical center of the upper end of the baffle 12 is installed in a vertical state, when the hot water supplied to the second chamber 16 rises due to the density difference due to convection phenomenon, This will guide you.

At least one nozzle 20 is formed in the high-temperature cyphonic pipe 18 at a predetermined vertically spaced apart state, and the nozzle 20 receives the high-temperature water guided through the high-temperature cyphonic pipe 18. 16).

The low-temperature cyphon pipe 22 is installed in a vertical position on the lower end side of the baffle 12, when the relatively low temperature hot water stored in the second chamber 16 descends due to a difference in density. This guides the discharge to the second chamber 14.

The solar heat storage tank 300 having the above structure raises the hot water heated in the state where only the hot water stored in the first chamber 14 partitioned by the baffle 12 is heated using the density difference according to the convection phenomenon. In the process of heating the hot water stored in the second chamber 16 by discharging it into the second chamber 16 through the nozzle 20 of the high-temperature cyphonic pipe 18, it rises again using the density difference according to the convection phenomenon. By using the hot water supply pipe 28 as a heat source for regenerating the refrigerant of the absorption type refrigerator 400, the heating time can be shortened as well as the efficiency of using the heat source can be shortened as compared with the conventional solar heat storage tank. The detailed description thereof will be described in more detail in the following description.

Hereinafter, the operation of the solar heat storage tank structure of the solar-driven absorption cooling and heating system according to the present invention will be described with reference to FIGS. 1 to 3C.

First, the hot water heat-exchanged through the heat exchanger 200 of the solar heat collecting plate 100 is supplied to the first chamber 14 of the heat storage tank body 10 through the heat storage supply pipe 24 and stored in the first chamber 14. In this case, the present invention heats only the hot water stored in the first chamber 14 partitioned by the baffle 12, as shown in FIG. 3A. Can improve.

Next, in the process of heating the hot water of the first chamber 14 by the hot water supplied from the heat storage supply pipe 24, the hot hot water rises as shown in FIG. 4B and is installed in the baffle 12. After ascending through the high temperature cyphonic tube 18, the second chamber 16 is discharged to the second chamber 16 through the nozzle 20 formed on the uppermost layer of the high temperature cyphonic tube 18.

The hot water discharged into the second chamber 16 regenerates the refrigerant of the absorption type refrigerator 400 through the hot water supply pipe 28 installed at the upper end of the heat storage tank body 10 through the difference in density of the upper part through convection. After being used as a heat source to be, it is returned to the first chamber 14 through the hot water supply and return pipe (30).

On the other hand, the hot water of the second chamber 16 is gradually heated in the process of discharging the hot water of the first chamber 14 to the second chamber 16 through the high-temperature cyphon tube 18 as described above, As shown in FIG. 4C, the hot water is discharged to the entire nozzle 20 of the high temperature cyphonic pipe 18 and gradually heated to the middle layer of the second chamber 16.

10: heat storage tank body 12: baffle
14: first chamber 16: second chamber
18: high temperature cyphonic tube 20: nozzle
22: low temperature cyphonic pipe 24: heat storage supply pipe
26: heat storage return pipe 28: hot water supply pipe
30: hot water supply pipe 100: solar heat collector
200: heat exchanger 300: solar heat storage tank
400: Absorption Chiller

Claims (1)

In the solar heat storage tank structure of the solar-driven absorption cooling and heating system to use the solar heat collected in the solar heat collecting plate 100 as a heat source for regenerating the refrigerant of the absorption chiller 400,
A heat storage tank body 10 formed in a cylindrical type with an empty inside;
A baffle (12) installed in the heat storage tank body (10) and partitioning the internal space of the heat storage tank body (10) into first and second chambers (14, 16);
It is connected to each of the first chamber 14 of the heat storage tank body 10 and connected to the solar heat collecting plate 100 and the heat exchanger 200, the hot water is heat-exchanged with the heat collected in the solar heat collecting plate 100 A heat storage supply pipe 24 and a heat storage return pipe 26 for supplying the first chamber 14 of the heat storage tank body 10 or returning hot water stored in the first chamber 14 to the heat exchanger 200;
The high temperature is installed in the center of the upper end of the baffle 12 and discharged to the second chamber 16 through the nozzle 20 formed on the circumferential surface of the hot water rising by the difference in density in the first chamber 14 A cyphon tube 18;
A low temperature cyphon pipe 22 installed at one side of the bottom of the baffle 12 and discharging hot water stored in the second chamber 16 to the first chamber 14;
It is connected to the second chamber 16 of the heat storage tank main body 10 and supplies the hot water, which rises due to a difference in density from the second chamber 16, to the absorption chiller 400 to be used as a heat source for regenerating refrigerant. Hot water supply pipe (28);
The hot water supply and return pipe 30 connected to the first chamber 14 of the heat storage tank body 10 and returning the hot water used as a heat source for regenerating the refrigerant in the absorption chiller 400 to the first chamber 14. Solar heat storage tank structure of the solar-powered absorption cold, heating system, characterized in that the configuration, including.

Images