KR101172578B1 - Solar collector type of condensing solar light - Google Patents

Abstract

The present invention relates to a light collecting solar heat collecting apparatus, comprising: a reflecting unit reflecting solar heat; A heat collecting portion having a receiving portion positioned at a focal point of the reflecting portion to collect solar heat and accommodating coiled pipes through which heat medium exchanges heat with the collected solar heat; And a heat collecting tube through which the heat medium of the heat collecting part circulates and flows through the reflecting part.

As a result, a medium and high temperature of 100 ° C. to 1,000 ° C. can be obtained, simultaneously performing cold heating and solar power generation, improving heat collection efficiency, and reducing costs.

Solar, Reflector, Auxiliary Reflector, Collector, Coiled Piping

Description

Condensing Solar Collector {SOLAR COLLECTOR TYPE OF CONDENSING SOLAR LIGHT}

The present invention can be performed at low cost and high efficiency in the local development of homes, hospitals, etc., and relates to a light concentrating solar heat collecting device that is easy to install and manage.

Recently, due to the depletion of fossil energy, instability of energy supply and demand, and global warming due to greenhouse gas emission, there is an urgent need for the development of clean and rich renewable energy including solar energy.

In general, solar heat is attracting attention along with wind power as a renewable energy source because it is an energy source with low energy density but its remaining amount is infinite, and there is no use cost at all. (Germany: 700 trillion won solar power plant in North Africa's Sahara Desert by 2050)

Examples of the method using solar heat include those used for cold heating and those used for power generation.

First of all, in order to use solar heat for heating and cooling in a general household, a collector is required to efficiently absorb and collect solar heat. The collector is largely divided into a flat collector and a parabolic surface having the same horizontal area and absorber area, and are condensed into a collector-type collector that collects sunlight into the absorber.

In the case of cooling and heating using the collector, the hot water collection temperature is 60 ° C. or less, and the cooling temperature is 80 to 100 ° C. when used as an absorption chiller for cooling, and when the Rankine cycle engine is used, a heat collection temperature of 120 to 130 ° C. is required.

In the case of cold heating, a selective collector is collected and treated or a flat plate collector having a honeycomb structure to satisfy the collection temperature conditions. In addition, the air layer between the collection of honeycomb bulbs and the glass cover is vacuumed to prevent convective loss, and at the same time, a plate-type collector using a special vacuum tube collector or a collector-type collector with an absorbing film is selected. The additional auxiliary structure is provided to compensate for the heat collecting efficiency of the flat plate collector because the heat collecting area and the heat loss area are proportional to each other.

However, the flat plate collector has a problem in that the manufacturing is complicated, the manufacturing cost is high, and the price is high.

In addition, since the flat plate collector focused on the research of low-cost, high-efficiency liquid flat plate collectors for solar water heaters and facility-type systems, the development of vacuum collectors and phase change type collectors as well as composite collectors with excellent applicability are currently being conducted. It is in the early stages of development.

Next, a solar power generation system will be described.

The solar power generation system is divided into a centralized system, a distributed system, and a standalone system.

The centralized system obtains high heat by gathering the sunlight reflected from a giant sun tracking reflector called a heliostat at a point in the centrally located tower. It is a method of generating electricity by generating high pressure steam using a heat exchanger or the like obtained in a high temperature furnace. The condensing ratio is around 100 and the steam turbine is operated at about 600 ° C.

A distributed system is a method of generating heat by heating a heat medium flowing in a pipe by distributing a plurality of unit condensing systems using a condenser, such as a line focus type or a plate, to generate heat by driving a heat engine such as a stirling engine.

Stand-alone system is a 5 ~ 25KW class system using the light collecting collector mentioned above, which is used as a small power source independent from the power system.

As a heat engine used in such a power generation system, a large-scale system employs a steam turbine technology for general thermal power generation, and in a small system, a large thermal efficiency and a small sized Stirling engine are used. Condensing collectors, which are the main elements of solar power generation systems, are commercially available in the line focus type, and are also adopted in SEGS of the United States, a representative distributed solar power generation system.

However, since it is manufactured in a large capacity having a large number of reflectors used in the above-described solar thermal power generation system, the production cost is too high, which makes it difficult to apply for small power generation.

In addition, since a plurality of reflectors for solar power generation of the prior art are manufactured, a collector is manufactured so that the heat collecting efficiency is only 85% or less.

In addition, the cold heater, generator, and the like using the solar heat of the prior art has a problem in that the characteristics of the collector is fixed to one of the below medium temperature or high temperature, it is not possible to simultaneously perform the heating and cooling.

Therefore, the present invention for solving the above-mentioned problems of the prior art, the light-collecting solar heat collecting device to operate the absorption type heating and cooling equipment using the medium temperature generated temperature, and to operate the solar power generation equipment using the high temperature generated temperature The purpose is to provide.

In addition, another object of the present invention is to provide a light concentrating solar heat collecting device having improved heat collecting efficiency of a heat collector.

In addition, another object of the present invention is to provide a light-collecting solar heat collector with low manufacturing cost, low installation cost, easy installation, and improved energy efficiency.

The present invention for achieving the above object, and a reflection unit for reflecting the solar heat; A heat collecting portion having a receiving portion positioned at a focal point of the reflecting portion to collect solar heat and accommodating coiled pipes through which heat medium exchanges heat with the collected solar heat; And a heat collecting tube through which the heat medium of the heat collecting part circulates and flows through the reflecting part.

In addition, the present invention and the reflector for reflecting the heat of the sun; A heat collecting part provided in the reflecting part and having an accommodating part accommodating coiled pipes through which heat medium exchanges heat with solar heat; An auxiliary reflector positioned at a focal point of the reflector to reflect the solar heat reflected from the reflector to condense the heat collector; It is also achieved by including a heat collecting tube through which the heat medium of the heat collecting portion circulates through the reflecting portion.

The heat collecting unit may further include a heat insulating cover for shielding the coil pipe.

The receiving portion is characterized in that the cross section is formed concave to the left and right concave.

The coil pipe is characterized in that formed in a cylindrical or conical shape.

In addition, the present invention is characterized in that it further comprises a heat medium flow rate adjusting unit for automatically adjusting the required heat transfer temperature range by adjusting the flow rate of the heat medium.

The reflector is made of a plurality, characterized in that arranged at equal intervals.

In addition, the present invention is a support for supporting the plurality of reflectors; It further comprises a sun tracking unit for inducing the plurality of reflectors toward the sun.

The sun tracking unit tracks the position of the sun using incident light incident from the sun, and adjusts the direction of the reflector so that the reflector faces the sun, or stores the movement path of the sun by time. The reflector is controlled to face the sun by two-axis sun tracking control that selectively or simultaneously applies a program method that adjusts the direction of the reflector toward each time using data.

The present invention to provide a light-concentrating solar heat collecting device that can collect the sunlight at a high light-concentration ratio to obtain a medium-high temperature of 100 ℃ ~ 1,000 ℃.

In addition, the present invention provides a solar heat collecting apparatus for operating the absorption type heating and cooling facilities using the generated temperature of the medium temperature, and to perform the cooling heating and solar power generation at the same time by operating the solar power generation equipment using the high temperature generated temperature. .

In addition, another object of the present invention is to provide a light concentrating solar heat collecting device having improved heat collecting efficiency of a heat collector.

In addition, the present invention provides an integrated reflecting portion and an auxiliary reflecting portion, and by additionally configuring an auxiliary collecting portion, the light collection efficiency of solar heat is effectively improved as compared with the conventional art.

In addition, the present invention provides a light-collecting solar heat collector with low manufacturing costs, low installation costs, easy installation, and improved energy efficiency.

EMBODIMENT OF THE INVENTION Hereinafter, although the Example of this invention is described in detail, this invention is not limited to a following example, unless the summary is exceeded.

1 is a perspective view showing the configuration of a light collecting solar heat collecting apparatus according to a first embodiment of the present invention, Figure 2 is a perspective view showing a heat collecting portion of a light collecting solar heat collecting apparatus according to a first embodiment of the present invention, 3 is a cross-sectional view of a heat collecting part of the light collecting solar heat collecting apparatus according to the first embodiment of the present invention.

1 to 3, the light collecting solar heat collecting apparatus 100 according to the first embodiment of the present invention includes a reflector 10 reflecting solar heat, a heat collecting unit 20 heat-exchanging with solar heat, and The heat medium of the heat collecting portion is composed of a heat collecting pipe 30 which circulates and flows.

The reflector 10 is composed of an integral parabolic reflector having a high reflectance. The reflector 10 is manufactured by cutting, forming, washing, primer coating, drying, silver coating, glass coating, and a super water-repellent coating process in order to have a high reflectance. The molding process was applied to the spinning method.

The reflector 10 manufactured by the above-described manufacturing process showed a reflectance of 98% when the light was collected at a light condensing ratio of 1 / 1,200 to 1/1600, a collecting temperature of 100 ° C to 1,000 ° C, and a diameter of 1.4 to 1.8m. That is, the reflectance was significantly increased by the coating treatment by the above-described treatment process on the aluminum disc.

The heat collecting portion 20 is configured to include a heat insulating cover 21 and a coiled pipe 25 seated inside the heat insulating cover 21.

The insulation cover 21 is made of a cylindrical material as a heat insulating material. The heat insulation cover 21 has an upper portion is shielded, the lower portion is open, the inside has a receiving portion 23 is accommodated in the coiled pipe 25 for circulating the heat medium.

The coiled pipe 25 is a pipe in which a heat medium (or water) is circulated therein, and flows into a coil shape by being introduced into the receiving part 23 after being introduced through the bottom opening of the heat insulating cover 21. To form. At this time, the coiled pipe 25 may be wound in a cylindrical coil shape.

4 is a view illustrating another embodiment of a heat collecting unit according to the first embodiment of the present invention.

Referring to FIG. 4, the accommodating portion 23 ′ of the heat insulating cover 21 ′ is concave in cross section left and right by recessed in the center thereof to reduce the reflection loss of sunlight incident to the accommodating portion 23 ′. By forming the recessed concave tube portion 24, the solar collection efficiency is improved.

At this time, the coil-shaped pipe (25 ') is wound in a coil shape so as to have an inverted conical coil shape, that is, an inverted triangle cross section and is seated on the receiving portion (23') of the heat insulating cover (21 '), thereby providing a heat insulating cover (21'). An incident space 27 is formed between the bottom opening of the bottom and the coiled pipe 25 ', and the sunlight is incident on the incident space 27 to receive the sunlight of the coiled pipe 25'. It can be widened to increase the heat collection efficiency.

The heat collecting parts 20 and 20 'having the above-described structure are integrally formed in a portion that becomes the focus of the reflecting part 10 through the heat collecting pipe 30, and the solar heat collected by the heat collecting parts 20 and 20'. It collects to the heat medium flowing through the coil pipe (25, 25 ').

At this time, the heat insulating cover (21, 21 ') heat-insulates the outside of the coil pipe (25, 25') flowing through the heat medium (or water) heat transfer of the solar heat transmitted to the coil pipe (25, 25 ') Reduce

This improves heat collection efficiency to 90% or more. For reference, the heat collecting efficiency of a conventional collector such as a flat plate was found to be about 85% or less.

Such a heat collecting part 20, 20 'has the structure mentioned above, ie, the structure of the concave pipe part 24, and the arrangement | positioning structure of the heat insulation cover 21, 21' and the coiled piping 25, 25 '. It is also easy to manufacture, simple in structure, and has also provided an effect of reducing costs compared to the prior art by improving thermal efficiency.

On the other hand, the heat collecting pipe 30 extends from the coiled pipes 25 and 25 'to form a heat medium circulation flow path passing through the reflecting portion 10. That is, the heat collecting pipe 30 is an inlet pipe 31 through which the heat medium flows into the coil pipes 25 and 25 ', and a discharge pipe 33 through which the heat medium flowing through the coil pipes 25 and 25' is discharged. Is done. Here, the inflow pipe 31 and the discharge pipe 33 are connected to a facility using hot water to supply cold water to the inflow pipe 31 and supply hot water heated by solar heat through the discharge pipe 33.

Furthermore, the light collecting solar heat collecting apparatus 100 of the present invention provides a flow rate adjusting unit (not shown) to adjust the flow rate of the heat medium circulating through the coil pipes 25 and 25 'to provide a necessary heat transfer temperature range. It can be adjusted automatically.

That is, the flow rate control unit (not shown) adjusts the flow rate of the heat medium circulating through the coil pipes 25 and 25 'so as to adjust the temperature of the heat medium to an appropriate temperature required by the solar facility in the range of 100 ° C to 1,000 ° C. This is possible.

5 is a view showing a state in which a plurality of light collecting solar heat collecting apparatus according to the first embodiment of the present invention is installed.

Referring to FIG. 5, the light collecting solar heat collecting apparatus 100 according to the present invention may further improve the solar heat collecting efficiency by disposing the plurality of reflecting units 10 at equal intervals. The condensing solar collector 100 having such a configuration includes a support 40 for supporting a plurality of reflecting portions 10 and a sun tracking portion 50 for inducing the plurality of reflecting portions 10 to face the sun. It further includes.

The support 40 serves to support the reflector 10, and therein is housed a pipe for supplying hot water to the heat collecting pipe 30.

When the support 40 supports the plurality of reflective parts 10, the connection part 41 is provided on the upper part of the support 10. That is, the plurality of reflecting portions 10 are installed on the upper portion of the support 40 so as to be rotatable at equal angular intervals by the connecting portion 41.

The connection part 41 rotatably supports the reflector 10 to the support 40. In addition, the connection part 41 rotates the reflection part 10 toward the sun according to the control signal of the sun tracking part 50.

The sun tracker 50 controls the reflector 10 to face the sun.

To this end, the sun tracking unit 50 performs two-axis sun tracking control. The two-axis sun tracking control refers to controlling the direction so that the reflector 10 faces the sun by using a method using a sun sensor and a method by a program.

The method of using the solar sensor refers to adjusting the direction of the reflector 10 toward the sun by tracking the position of the sun by using the sunlight incident from the sun.

In the program method, the direction in which the reflector 10 is directed is adjusted for each time using data stored in a movement path of the sun for each time.

The sun tracking unit 50 adjusts the position of the reflector 10 so that the reflector 10 faces the sun by simultaneously applying one or two of the solar sensor method and the program method.

6 is a view showing the operation of the light collecting solar heat collecting apparatus according to the first embodiment of the present invention.

Referring to FIG. 6, the light collecting solar heat collecting apparatus 100 according to the first embodiment of the present invention is installed in conjunction with the heat storage tank 300 and the solar heat utilization facility 400. In the condensing solar collector 100 installed as described above, the heat medium is introduced into the heat collecting unit 20 through the inlet pipe 31. The heat medium flowing into the heat collecting part 20 is heated by the sunlight reflected and collected by the reflecting part 10.

At this time, as shown in Figure 4, if the concave tube portion 24 is formed in the accommodating portion 23 'of the heat insulating cover 21', and the inverted conical coil-shaped pipe 25 'is installed, the light condensing efficiency And the heating efficiency of the heat medium can be improved.

The heat medium heated in the heat collecting unit 20 repeats the circulation of flowing to the heat storage tank 300 through the discharge pipe 33 to exchange heat and then moving back to the heat collecting unit 20.

As described above, energy obtained by condensing solar heat is stored in the heat storage tank 300. The heat energy stored in the heat storage tank 300 is transmitted to and used in solar heat use facilities 400 such as absorption type cold heating facilities, solar power generation facilities, and hot water hot water facilities using low temperature, medium temperature, and high temperature heat.

The condensing solar collector 100 of the present invention condenses solar heat with a high condensing ratio to obtain a medium to high temperature of 100 ℃ ~ 1,000 ℃.

7 is a perspective view illustrating a structure of a light collecting solar heat collecting apparatus according to a second embodiment of the present invention, and FIG. 8 is a cross-sectional view of the light collecting solar heat collecting apparatus according to the second embodiment of the present invention.

7 to 8, the light collecting solar heat collecting apparatus 200 according to the second embodiment of the present invention has the same configuration as the light collecting solar heat collecting apparatus 100 of the first embodiment described above, but has a reflector ( It further comprises an auxiliary reflecting unit 120 for reflecting the solar heat reflected by 10) to focus on the heat collecting unit 110.

Such a condensing solar collector 200 includes a reflecting unit 10 reflecting solar heat, a collecting unit 110 provided at the reflecting unit to heat-exchange with solar heat, and an auxiliary reflecting unit 120 provided at a focus of the reflecting unit. ), The heat medium of the heat collecting portion is composed of a heat collecting pipe 30 through which the circulation flows.

The heat collecting unit 110 is provided at the center of the plate surface of the reflecting unit 10 and accommodates the coiled pipe 115 through which a heat medium that exchanges heat with solar heat flows. That is, the heat collecting unit 110 is configured to include a heat insulation cover 111 and the coiled pipe 115 seated inside the heat insulation cover 111.

The heat insulation cover 111 has an upper portion and a lower portion thereof, and has an accommodating portion 113 in which a coil type pipe 115 for circulating a heat medium is seated.

The coiled pipe 115 is introduced through the bottom opening of the heat insulating cover 111 and then inserted into the receiving portion 113 to form a flow path wound in a coil shape.

The auxiliary reflector 120 is located at the focal point of the reflector 10 and reflects the solar heat reflected from the reflector 10 to condense the heat collector 110. That is, the auxiliary reflecting unit 120 is supported by the auxiliary support 121 penetrating the reflecting unit 10 to become a focal point of the reflecting unit 10, and collects the solar light incident from the reflecting unit 10. Curvature is formed in the bottom surface so as to reflect the coiled pipe 115 of). The auxiliary reflector 120 is also manufactured in the same process as the above-described reflector 10.

9 is a view showing another embodiment of a heat collecting unit according to a second embodiment of the present invention.

Referring to FIG. 9, the accommodating part 113 ′ is formed of the concave tube part 114 as in the accommodating part 25 ′ (see FIG. 4) of the first embodiment described above, thereby reducing the reflection loss of sunlight to reduce heat collection efficiency. It may be configured to improve.

In addition, the coiled pipe 115 'is wound in a coil shape so as to have a conical coil shape, that is, a triangular cross section, and is seated on the receiving portion 113' of the heat insulation cover 111 ', whereby the top surface of the heat insulation cover 111' is formed. An incidence space 117 is formed between the open portion and the coiled pipe 115 ', and sunlight is incident into the incidence space 117 to widen the area receiving sunlight from the coiled pipe 115'. The heat collection efficiency can be improved.

10 is a view showing a state in which a plurality of light collecting solar heat collecting apparatus according to a second embodiment of the present invention is installed.

Referring to FIG. 10, the light concentrating solar heat collecting apparatus 200 according to the second embodiment may also use the connecting portions 41 of the support 40 at equal intervals in order to improve the light collecting efficiency. Can be installed. Furthermore, the sun tracking unit 50 may be provided to control the reflector 10 to face the sun.

In the condensing solar collector of the second embodiment 200, the secondary reflection unit 120 reflects the solar heat reflected by the reflecting unit 10 to condense the condensing unit, thereby achieving high condensing. Therefore, the heat collection efficiency to the heat medium flowing through the coil pipe 115 (see FIG. 8) can be improved.

11 is a view showing an embodiment of the application of the light collecting solar heat collector according to the present invention.

Referring to Figure 11, the hot water heated through the condensing-type solar heat collector (100,200) according to the present invention is used for indoor heating, hot water supply, etc., medium and high temperature hot water can be used for steam turbine power generation, low temperature hot water Can be used for power generation using LTPC engines. In addition, by providing an absorption refrigerator 520 to cool the hot water can be used for cooling the room.

When there is no rainy season or the sun, the boiler 510 may be operated as an auxiliary heat source to supply hot water. The boiler 510 may apply a biomass boiler that uses a fuel such as methane, ethanol and hydrogen by pyrolyzing or fermenting a living organism.

As such, by supplying cooling, heating, and hot water using the condensing solar heat collectors 100 and 200, energy saving and global warming gas may be reduced compared to existing fossil fuels.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined by the appended claims. .

The present invention can be applied to solar power generation systems, such as small, medium-sized solar generators, solar air conditioners.

1 is a perspective view showing the configuration of a light collecting solar heat collecting device according to a first embodiment of the present invention

2 is a perspective view showing a heat collecting part of the light collecting solar heat collecting device according to the first embodiment of the present invention;

Figure 3 is a cross-sectional view of the heat collecting portion of the light collecting solar heat collector according to the first embodiment of the present invention

4 is a view showing another embodiment of a heat collecting unit according to a first embodiment of the present invention;

5 is a view showing a state in which a plurality of concentrating solar heat collector according to a first embodiment of the present invention is installed

6 is a view showing the operation of the light collecting solar heat collector according to the first embodiment of the present invention

7 is a perspective view showing the structure of a light collecting solar heat collecting apparatus according to a second embodiment of the present invention

8 is a cross-sectional view of a light collecting solar heat collecting apparatus according to a second embodiment of the present invention.

10 is a view showing a state in which a plurality of light collecting solar heat collecting apparatus according to a second embodiment of the present invention is installed

11 is a view showing an embodiment of the application of the condensing solar heat collector according to the present invention

DESCRIPTION OF THE RELATED ART [0002]

100, 200: condensing solar collector

10: reflecting portion 20: heat collecting portion

30: heat collecting pipe 40: connection portion

50: solar tracker 60: support

120: secondary reflector

Claims (10)

delete A plurality of reflectors configured of an integral parabolic reflector and reflecting solar heat and disposed at equal intervals; A heat collecting portion provided in the plurality of reflecting portions, the accommodating portion accommodating coiled pipes through which heat medium exchanges heat with solar heat, and an insulating cover for shielding the coiled pipes around the accommodating portion; An auxiliary reflecting unit positioned at each focal point of the plurality of reflecting units to reflect back the solar heat reflected from each of the reflecting units to condense the heat collecting unit; A heat collecting tube through which the heat medium of the heat collecting unit circulates and flows through the plurality of reflecting units, respectively; A heat medium flow rate adjusting unit which automatically adjusts a required heat transfer temperature range by adjusting a flow rate of the heat medium; A support for supporting the plurality of reflectors; Concentrating solar heat collecting device, characterized in that it comprises a solar tracking unit for directing the plurality of reflectors toward the sun. delete 3. The method of claim 2, The receiving portion is a condensing solar collector, characterized in that the cross section is formed concave to the left and right. delete delete delete delete 3. The method of claim 2, The sun tracking unit, The solar sensor method of tracking the position of the sun using incident light incident from the sun to adjust the direction of the reflector so that the reflector faces the sun, or hourly using data storing the sun's movement path by time Condensing solar heat collecting device, characterized in that for controlling the reflector facing the sun by two-axis sun tracking control to selectively or simultaneously apply a program method for adjusting the direction toward the reflector. 3. The method of claim 2, The reflecting unit is a condensing solar heat collecting device, characterized in that manufactured by the spinning method of cutting, forming, washing, primer coating, drying, silver coating, glass coating, super water-repellent coating process of the aluminum raw material.

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