KR101631508B1 - Temperature control system for road using solar heat and geothermal heat pump - Google Patents

Abstract

A road surface temperature control system using a solar and geothermal heat pump is disclosed. According to the present invention, natural energy such as geothermal and solar heat is supplied to the heat pump unit, thereby reducing the energy required to control the temperature of the road surface.

Description

TECHNICAL FIELD [0001] The present invention relates to a temperature control system for a road surface using a solar heat and a geothermal heat pump,

The present invention relates to a road surface temperature control system using a solar thermal and geothermal heat pump, and more particularly, to a solar thermal and geothermal heat pump capable of reducing the energy required to control the temperature of the road surface using natural energy such as geothermal heat and solar heat. The present invention relates to a road surface temperature control system.

Various transportation means are used for the transportation of people and freight, and the transportation of the vehicles is a significant proportion. As a result, the expansion of packed roads continues to the present day to the present.

Generally, the surface layer of the packed road is made of asphalt or concrete having high coefficient of friction with the tire of the vehicle. When snow is piled up on the surface of the road or water such as rainwater is frozen by cold weather, It is often the case that a vehicle equipped with a normal tire can not be operated.

In this case, a method of spraying a chemical material capable of lowering the freezing point of water, such as sodium chloride or calcium chloride, to dissolve frozen water is widely used. However, due to the corrosiveness of the chemical dissolved in water, And there is a problem that contamination of sewage is caused.

Also, there is a method of disposing an electric heating line in the surface layer of the road and removing the ice from the heat generated by applying electric power to the electric heating line, but there is a disadvantage that enormous electric power is used to raise the temperature of the road surface layer cooled in the winter season.

In order to solve such a problem, Korean Patent Registration No. 10-1328067 (hereinafter referred to as "Patent Document 1") and Korean Patent Application Publication No. 10-1334228 (hereinafter referred to as Patent Document 2) The same countermeasures have been proposed.

Patent Document 1 discloses a technique for increasing the temperature of a road surface layer by circulating leachate such as ground water or rock water leached into a tunnel into a road surface layer. Patent Document 2 discloses a technique for circulating the surface layer of a river water near a tunnel to increase the surface layer temperature Thereby removing the ice.

However, in areas with very low temperatures, it is highly likely that river water will not freeze to the surface of the road. Also, leachate may be frozen in the course of circulation through the surface of the road, and there may be local limitations to ensure that there is sufficient leachate to increase the circulation rate to prevent leachate freezing.

On the other hand, when the surface layer of the road is made of asphalt, the temperature of the surface layer may be elevated to a very high level in a period of strong sunlight, such as during the summer season. In this case, the bond strength between the components due to the pitch included in the asphalt is drastically lowered, and the surface layer of the road is easily damaged.

Therefore, in order to solve the above-mentioned problems, there is a need for means for appropriately adjusting the temperature of the road surface as necessary.

Patent Registration No. 10-1328067 (Title of invention: Anti-freezing device for tunnel entrance and exit road and method of construction thereof, registered date: November 5, 2013) Korea Intellectual Property Office Registration No. 10-1334228 (Title: Anti-icing device and method of construction, registration date: Nov. 22, 2013)

Embodiments of the present invention are intended to be able to control the temperature of the surface of a packaged road.

Embodiments of the present invention also seek to minimize the energy used to control the temperature of the road surface.

According to an aspect of the present invention, there is provided a heat pump unit comprising: a heat pump unit having a pair of heat exchangers, a compressor, a four-way valve, and an expansion valve; a heat storage unit having one or more heat storage tanks installed in a basement; And the other end is connected to the heat pump unit, and the third pipe is connected to the heat pump unit by the third pipe and the fourth pipe, and the second pipe is connected to the heat pump unit. A heat exchange unit having at least one heat exchange pipe connected to the heat pump unit, a first three-way valve installed at the first pipe, and a third three-way valve installed at the third pipe, A sixth conduit having both ends thereof connected to a second three-way valve installed in the second conduit and a fourth three-way valve provided in the second conduit, a fifth conduit in which the pump is installed, valve A fifth three-way valve installed at a position between the heat storage tanks and a sixth three-way valve installed at a position between the second three-way valve and the heat storage tank of the second duct, Can be provided.

The road surface temperature control system using the solar and geothermal heat pumps comprises a heat exchange module, external heat supply means for supplying heat to the heat exchange module, Way valve, one end connected to the sixth three-way valve and the other end connected to the heat exchange module, one end connected between the sixth three-way valve and the heat storage tank of the second duct, and the other end connected to the sixth three- And a ninth conduit connected to the seventh three-way valve.

Here, the external heat supply unit may include a heat collecting panel connected to the heat exchange module and collecting solar heat.

On the other hand, the heat exchange pipe can be disposed in the surface layer of the packed road.

According to the embodiment of the present invention, since the surface of the road can be heated or cooled by using the heat pump unit, the temperature of the surface of the road can be appropriately adjusted as needed, such as seasonal conditions.

According to the embodiment of the present invention, by utilizing geothermal and solar heat, it is possible to save energy required to control the temperature of the road surface.

1 is a schematic diagram of a system for controlling a road surface temperature using a solar and geothermal heat pump according to an embodiment of the present invention.
2 is a view for explaining the structure of the heat exchanger shown in Fig. 1
Figs. 3 to 7 are views for explaining the operation of the geothermal heat pump shown in Fig. 1

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a system for controlling a road surface temperature using a solar thermal and geothermal heat pump according to an embodiment of the present invention.

Referring to FIG. 1, a road surface temperature control system 1 using a solar and geothermal heat pump according to an embodiment of the present invention includes a heat pump unit 100, a temperature controller 300, a heat storage 500, External heat supply means are included.

The road surface temperature control system 1 using the solar heat and the geothermal heat pump includes a plurality of pipes L11 to L19 connecting the components to each other to circulate the heating medium, And a plurality of three-way valves TV11 to TV17 for controlling the flow direction and flow direction of the heating medium through the conduits L1 to L19.

The heat pump unit 100 includes a pair of heat exchangers, a compressor, a four-way valve, an expansion valve, and a working fluid flowing in the expansion valve. The pipes L13, L14 to be heated or cooled by the working fluid.

For reference, working fluids such as chlorofluorocarbons (CFCs), hydrofluorocarbons (HCFCs), hydrofluorocarbons (HFCs), and perfluorocarbons (PFCs) used in a typical refrigeration cycle may be used.

Here, the heat pump unit 100 is as described in Korean Patent Application No. 10-2014-0084297 (entitled " Thermo-hygrostat using geothermal waste heat) " filed by the present applicant, Since the structure and operation of the pump unit 100 itself are not essential, detailed description thereof will be omitted in order not to obscure the gist of the present invention.

The temperature control unit 300 includes a heat exchange pipe 310. Both ends of the heat exchange pipe 310 are respectively connected to the third conduit L13 and the fourth conduit L14 connected to the heat pump unit 100. When the heat pump unit 100 is operated, ).

A plurality of heat exchange pipes 310 may be installed as shown in FIG. The structure and operation of the heat exchange pipe 310 will be described below with reference to FIG.

The heat storage part 500 includes at least one heat storage tank 501, and the heat storage tank 501 is buried underground. The heat pump unit 100 and the heat storage tank 501 are connected by a first conduit L11 and a second conduit L12 and one end of the first conduit L11 is connected to the upper side of the heat storage tank 501 One end of the second conduit L12 is connected to the lower side of the heat storage tank 501 and the other end of the second conduit L12 is connected to the heat pump unit 100. [

As shown in the figure, a first pump (P11) is provided in the first conduit (L11) to flow the heating medium from one end to the other end. A first three-way valve TV11 and a fifth three-way valve TV15 are sequentially installed. A second three-way valve TV12 and a sixth three-way valve TV16 are sequentially installed in the second conduit L12 from one end to the other end.

The heat storage tank 501 is buried and buried because it uses geothermal heat. Even if the temperature is changed due to seasonal changes, the heat storage tank 501 is kept at a constant temperature throughout the year or in a small temperature change. So that the temperature can be controlled by the geothermal heat.

For example, at a depth of about 10 m underground, it is known that the annual temperature is maintained within the range of 10 to 12 degrees Celsius. Therefore, when the heat medium in which the road surface temperature control apparatus 1 using the geothermal heat pump is operated is stored in the heat storage tank 501 ), The temperature of the heating medium can be controlled close to the temperature of the ground in the course of flowing or flowing through the heating medium.

Although not shown in detail, a space is formed in the heat storage tank 501 for storing or flowing the heat medium, so that the heat medium flowing into the lower side of the heat storage tank 501 through the first conduit L11 is heat- Is moved upward through the interior of the tank 501, and then flows out through the second conduit L12.

At this time, a porous permeable layer may be formed inside the heat storage tank 501 so that the temperature of the heat medium can be rapidly changed to a temperature equal to or close to that of the ground. The permeable layer may stack a large amount of granular heat storage material so that the heating medium is stored or flowed by the gap formed therebetween. As such a granular heat storage material, a natural material such as gravel or an artificially produced material having a high thermal conductivity and a large specific heat may be used.

As the depth of the heat storage tank 501 is increased or the size of the heat storage tank 501 is increased, the installation cost is increased. However, regardless of the change in the temperature of the ground, Can be increased.

Accordingly, when the heat pump unit 100 is operated to heat or cool the heat exchange pipe 310, a heating medium having a temperature higher than the temperature can be supplied from the heat storage tank 501 during the winter season, It is possible to obtain an effect that the energy required for the operation of the heat pump unit 100 is saved.

For reference, as the heat medium circulating between the heat pump unit 100 and the heat storage tank 501 through the first to the nineteenth conduits L11 to L19, there is used an antifreeze or the like containing ethylene glycol, alcohol, or the like in water This is to prevent the heating medium from freezing during the winter season.

The external heat supply means includes a heat collecting panel 700, pipelines LS11 and LS12 and a pump 14. The heat collecting panel 700 is connected to the heat exchanging module 710 and the heating medium Is circulated. For reference, the heat medium contained in the solar heat collecting part may also be an antifreeze or a heat medium oil containing ethylene glycol, alcohol, or the like in water so as not to freeze in the winter season.

The heat collecting panel 700 collects solar heat to heat the heating medium flowing inside, and the pump P14 circulates the heating medium so that the solar heat collected in the heat collecting panel 700 is transferred to the heat exchanging module 710.

Here, the heat collecting panel 700 assumes the case of utilizing solar heat, and may be replaced with means for converting energy collected by a windmill or aberration into heat or the like.

That is, the heat collecting panel 700 can be replaced with a heat source that is easy to obtain in a region where the road temperature control system 1 using the geothermal heat pump is installed. In addition, it is aimed to make it possible to easily obtain energy from the remote areas of the island or mountains where electricity supply and demand is unstable.

The heat exchange module 710 is for transferring heat from the heat collecting panel 700 to the heat medium circulating through the heat pump unit 100. The heat exchanging module 710 is connected to the seventh duct L17, And the eighth duct (L18) are connected.

That is, one end of the seventh channel L17 is connected to the fifth three-way valve TV15, the other end is connected to the heat exchange module 710, and one end of the eighth channel L18 is connected to the sixth three- And is connected to the valve TV16.

In this embodiment, a seventh three-way valve TV17 provided on the seventh channel L17 and one end connected between the sixth three-way valve TV16 and the heat storage tank 501 of the second conduit L12 And the other end thereof is connected to the seventh three-way valve L17.

A third three-way valve TV13 is provided in the third pipe L13 and a fourth three-way valve TV14 is provided in the fourth pipe L14. Both ends of the third three-way valve TV14 are connected to the first three- A fifth conduit L15 connected to the third three-way valve TV13 and having a third pump P13 at the middle portion thereof and a fifth conduit L15 connected at both ends to the second three-way valve TV12 and the fourth three- The sixth conduit L16 is further included.

Their operation will be described below again.

Fig. 2 is a view for explaining the structure of the heat exchanging part shown in Fig.

Referring to FIG. 2, the heat exchange pipe 310 described above may be disposed in the surface layer 930 of the road 900.

The packed road 900 includes a base layer 910 and a surface layer 930. Herein, the base layer 910 refers to a layer formed on the ground to firmly support the surface layer 930, and the surface layer 930 refers to a portion made of asphalt or concrete and directly in contact with the treads or the like of the vehicle .

Usually, the surface layer 930 is formed by laminating materials such as asphalt a plurality of times. The heat exchange pipe 310 is installed in the process of forming the surface layer 930, and is disposed in the surface layer of the completed road.

At this time, a plurality of heat exchange pipes 310 may be installed, and the number of the heat exchange pipes 310 may be increased or decreased according to the length of the road 900 to control the temperature.

As described above, according to the operation of the road surface temperature control system 1 having the heat storage tank, the heat exchange pipe 310 can heat or cool the surface layer 930.

For example, in the case where the surface layer 930 is formed on the upper surface of the surface layer 930 and the ice is formed by freezing water, the heated heat medium is allowed to flow through the heat exchange pipe 310 so that snow or frozen water is melted can do.

The temperature of the surface layer 930 is maintained as an image so that the snow or moisture that is in contact with the surface layer 930 can be immediately So that the formation of the ice sheet on the road 900 can be prevented.

On the other hand, when the amount of sunshine is very large as in the summer, the surface layer 930 can be heated to a considerably high temperature. At this time, when the surface layer 930 is made of asphalt, the strength may be lowered by the high temperature. When the strength of the surface layer 930 is lowered, when a vehicle or the like having a heavy load passes through the road 900, repeated deformation of the surface layer 930 with lower strength may be caused to shorten the durability of the surface layer 930 have.

Therefore, when the temperature of the surface layer 930 is excessively increased, the road surface temperature control system 1 having the heat storage tank is operated to flow the cooled heat medium through the heat exchange pipe 310 so that the surface layer 930 is heated to a proper temperature The strength of the surface layer 930 can be maintained.

For reference, although not shown, the temperature of the surface layer 930 may be measured by installing a temperature sensor in the surface layer 930 together with the heat exchange pipe 310.

On the other hand, the heat exchange pipe 310 must be flexible so that it can be bent in a proper shape depending on the shape of the road. As described above, since the surface layer 930 expands and contracts according to the temperature, the heat exchange pipe 310 must also have elasticity to expand and contract together with the surface layer 930.

Therefore, the heat exchange pipe 310 can be made of a synthetic resin such as polyethylene having high chemical resistance, weather resistance, flexibility and stretchability, or a metal material such as stainless steel, and can be formed into a corrugated pipe shape.

Hereinafter, the operation of one embodiment of the present invention having the structure as described above with reference to Figs. 1, 3 to 7 will be described.

Referring again to FIG. 1, when the heat pump unit 100 is operated using geothermal heat, the flow of heat medium is indicated by an arrow.

When the compressor of the heat pump unit 100, the first pump P11 and the second pump P12 are operated, the heated heating medium flows out from the heat pump unit 100 along the fourth conduit L14. At this time, the fourth three-way valve TV14 is controlled so that the heating medium does not flow into the sixth conduit L16.

The heated heating medium flowing through the fourth conduit L14 flows to the third conduit L13 after passing through the heat exchange pipe 310 and is returned to the heat pump unit 100 by the operation of the second pump P12 ≪ / RTI > At this time, the third three-way valve TV13 is controlled so that the heating medium does not flow to the fifth conduit L15.

In the process described above, the heating medium introduced into the heat exchange pipe 310 is cooled while heating the surface layer 930 of the road 900, so that the surface layer 930 is heated and the heating medium is relatively cooled.

The cooled heat medium is heated again in the heat pump unit 100 and flows to the heat exchange pipe 310 so that the temperature of the surface layer 930 is raised. The surface layer 930 is provided with a temperature sensor or a freezing state The heat exchange pipe 310 can be heated continuously until the snow or ice on the surface layer 930 is melted and removed.

As the first pump P11 is operated, the heat medium in the heat storage tank 501 flows into the heat pump unit 100 through the first conduit L11 and flows through the heat pump unit 100 The heat transfer medium flows into the heat storage tank 501 through the second conduit L12.

For this purpose, the first three-way valve TV11 and the fifth three-way valve TV15 are controlled so that the heating medium flows only through the first conduit L11, and the second three-way valve TV12 and the sixth three- (TV16) is adjusted so that the heating medium flows only through the second conduit L12.

The heating medium flowing into the heat pump unit 100 through the first conduit L1 has the same or similar temperature as the geothermal heat during its stay in the heat storage tank 501. [

Therefore, it has relatively higher temperature than the surface layer 930, that is, energy due to the geothermal energy. The heat pump unit 100 utilizes the geothermal energy to heat the cooled heat medium flowing through the third conduit L13 and flow out to the fourth conduit L14, Energy can be saved.

In this process, the heating medium flowing through the first conduit L11 is cooled again and flows out through the second conduit L12, and the cooled heating medium flows into the heat storage tank 501. [

The first conduit L11 is connected to the upper side of the heat storage tank and the second conduit L12 is connected to the lower side of the heat storage tank 501 as described above. The cooled heating medium flows into the lower side of the heat storage tank 501. The cooled heating medium is moved from the lower side to the upper side of the heat storage tank 501 and absorbs the surrounding geothermal heat while passing through the permeable layer as described above to raise the temperature.

However, if the heat medium that has been cooled into the heat storage tank 501 flows into the heat storage tank 501 and the heat medium having a temperature raised by the geothermal heat continuously flows for a long time, the temperature of the heat medium may gradually decrease.

To prevent this, the volume of the heat storage tank 501 may be increased, the number of the heat storage tanks 501 included in the heat storage unit 500 may be increased, or external energy may be utilized.

FIG. 3 illustrates a case in which solar heat collected by the above-described heat collecting panel 700 is utilized.

3, the fifth three-way valve TV15 is controlled so that the heat medium flowing out of the heat exchange module 710 flows into the heat pump unit 100 through the first conduit L11, The cooled heat medium flowing out of the heat pump unit 100 is flown into the heat exchange module 710 through the second conduit L12 and the eighth conduit L18.

The solar heat collected by the heat collecting panel 700 is transmitted to the heat exchanging module 710 by the ducts LS11 and LS12 and the pump P14 connected to the heat collecting panel 700, To the pump module (100).

Therefore, the energy required to operate the heat pump unit 100 to heat the heat exchange pipe 310 by the solar heat supplied to the heat pump unit 100 through the heating medium can be reduced.

FIG. 4 illustrates the case where the present embodiment utilizes both solar heat and geothermal heat.

4, the sixth three-way valve TV16 is controlled so that the heating medium flowing through the second conduit L12 flows into the heat exchange module 710, and the seventh three-way valve TV17 is controlled by the heat exchange module 710 are controlled to flow into the heat storage tank 501 through a part of the ninth line L19 and the second line L12.

Accordingly, the solar heat collected by the heat collecting panel 700 is supplied to the heat exchange module 710, and the heat medium whose temperature is raised by the heat is again introduced into the heat pump unit 100 after passing through the heat storage tank 501 .

Therefore, since the heat pump unit 100 utilizes both the geothermal heat and the solar heat, the energy required for the operation can be further reduced.

In this case, the temperature of the heat medium flowing into the heat storage tank 501 from the heat exchange module 710 may be higher than the temperature inside the heat storage tank 501. In this case, when the heat medium passes through the heat storage tank 501 The temperature of the surrounding soil and the above-mentioned heat storage material is increased, and the energy obtained from the solar heat is saved.

That is, since the solar heat can be obtained when the daytime and the weather condition are good, the energy obtained from the solar heat can be accumulated in the heat storage tank 501 against nighttime or bad weather.

When sufficient heat energy is accumulated in the heat storage tank 501, the heat exchange pipe 310 may be heated without operating the heat pump unit 100. This will be described with reference to FIG.

5, the pump P13 installed in the fifth conduit L15 is operated, and the first three-way valve TV11 and the third three-way valve TV13 flow from the heat storage tank 501 And the heat medium is respectively introduced into the heat exchange pipe 310 via the fifth conduit L15. The second three-way valve TV12 and the fourth three-way valve TV14 are respectively controlled so that the heat medium passing through the heat exchange pipe 310 flows into the heat storage tank 501 via the sixth conduit L16.

At this time, the electric power supplied to the heat pump unit 100, the first pump P11 and the second pump P12 is cut off and they are not operated.

The heat energy stored in the heat storage tank 501 can be used to transfer the thermal energy to the heat exchange pipe 310 so that the heat pump unit 100 and the pumps P11 , P12) can be saved.

On the other hand, when the amount of sunshine is sufficient, the solar heat collected by the condensing panel 700 may be transmitted to the heat exchange pipe 310 as shown in FIG.

6, the heating medium flowing out of the heat exchange module 710 by controlling the first three-way valve TV11, the third three-way valve TV13 and the fifth three-way valve TV15, A portion of the first conduit L11, the fifth conduit L15, and the like, and then supplied to the heat exchange pipe 310.

The second three-way valve TV12, the fourth three-way valve TV14 and the sixth three-way valve TV16 are respectively regulated so that the heat medium passing through the heat exchange pipe 310 passes through the sixth conduit L16, A portion of the conduit L12, and the eighth conduit L18 to the heat exchange module 710. [

7 shows a case in which the amount of sunshine is somewhat insufficient to utilize the geothermal heat at the same time, or the energy obtained from the solar heat is accumulated in the heat storage tank 501.

That is, when the first to seventh three-way valves are adjusted so that the heating medium can flow in the illustrated direction and the third pump P13 is operated, the heating medium is circulated through the heat exchange module 710, the heat storage tank 501, The pipe 310 can be circulated.

The heat collecting panel 700 can be configured to utilize natural energy such as a tidal force or a wave power depending on the regional characteristics in which the present embodiment 1 is installed in addition to the aberration and the windmill. As the natural energy is utilized as described above, the energy consumed by the heat pump unit 100 can be saved, and the embodiment (1) can be installed in an area where power supply and demand is unstable.

The operation of the embodiment 1 described above assumes the case where the surface layer 930 of the road 900 is heated by heating the heat exchange pipe 310 and the heat pump unit 100 and the pump P11 To P13), it is possible to cool the surface layer 930 by the heat exchange pipe 310.

That is, when the temperature of the surface layer 930 is excessively raised by sunlight or the like and the strength of the surface layer 930 is likely to be lowered, the temperature of the surface layer 930 is lowered by the heat exchange pipe 310 It is possible to prevent the temperature from exceeding the predetermined temperature. Accordingly, it is possible to minimize the deformation or breakage of the surface layer 930 due to the passage of the vehicle in the summer and the like, so that the service life of the road 900 can be extended.

In addition, when the heat exchange pipe 310 is installed in an agricultural building such as a residential building, a greenhouse or a greenhouse, the energy consumption for cooling and heating using the embodiment (1) Can be performed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed embodiments, Other embodiments may easily be proposed by adding, changing, deleting, adding, or the like of components within the scope of the present invention, but this also falls within the scope of the present invention.

1: Surface temperature control system with heat storage tank
100: Heat pump unit 300: Temperature control unit
310: Heat exchange pipe 500: Heat storage part
501: heat storage tank 700: heat collecting panel
710: Heat exchange module 900: Road
910: Base layer 930: Surface layer
L11 to L19: first to ninth conduits
TV11 to TV17: first to seventeenth three-way valves
P11 to P14: First to fourth pumps

Claims (4)

A heat pump unit having a pair of heat exchangers, a compressor, a four-way valve, and an expansion valve;
A heat storage unit having one or more heat storage tanks installed underground;
A first conduit having one end connected to the upper side of the heat storage tank and the other end connected to the heat pump unit;
A second conduit having one end connected to the lower side of the heat storage tank and the other end connected to the heat pump unit;
A temperature regulator having at least one heat exchange pipe connected to the heat pump unit by a third duct and a fourth duct;
A fifth conduit having both ends connected to a first three-way valve installed in the first conduit and a third three-way valve installed in the third conduit, and a third pump installed in the middle portion;
A sixth conduit connected at both ends to a second three-way valve installed in the second conduit and to a fourth three-way valve installed in the fourth conduit;
A fifth three-way valve installed at a position between the first three-way valve of the first conduit and the heat storage tank;
A sixth three-way valve installed at a position between the second three-way valve of the second conduit and the heat storage tank;
Heat exchange module;
External heat supply means for supplying heat to the heat exchange module;
A seventh conduit having one end connected to the fifth three-way valve and the other end connected to the heat exchange module;
An eighth conduit having one end connected to the sixth tri-directional valve and the other end connected to the heat exchange module;
And a ninth conduit connected at one end between the sixth three-way valve and the heat storage tank of the second conduit and at the other end connected to the seventh three-way valve,
Wherein the external heat supply unit includes a heat collecting panel connected to the heat exchange module and collecting solar heat,
The heat exchange pipe is disposed within the surface layer of the packed road
Surface temperature control system using solar and geothermal heat pumps.
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