KR20160065502A - Geothermal heat exchange system using heat storage-tank of vertical pipe - Google Patents

Abstract

The present invention relates to a geothermal heat exchange system using a heat storage tank of a center vertical pipe. Specifically, the heat storage tank of the vertical pipe is installed into a bored inside of each cast in place pile (CIP) after the multiple CIPs are bored in the ground at the depth of 8-10 m under the ground surface. Heat exchange is performed by aluminum pipe inlet pipe of a spiral coil shape mounted on the heat storage tank of the vertical pipe. So, construction costs and manufacturing costs can be reduced in comparison with a pipe-shaped geothermal heat exchange system heat-exchanging by boring the ground at the depth of 150 m under the ground and can reduce noise caused by construction. The geothermal heat exchange system can obtain same heating effect as that of the pipe-shaped geothermal heat exchange system. The heat storage tank of the vertical pipe is formed as a mixing tank in which water is mixed with 10-30% of ethanol to prevent the mixing tank from being frozen and to improve conductivity in accordance with geothermal heat exchange. Vinyl and a reflection insulation material are bonded to both sides of the heat storage tank of the vertical pipe, which is exposed to the outside of the ground surface, so a fixed temperature can be maintained as the inside of the heat storage tank of the vertical pipe keeps warm. As a heating cable is mounted on a PVC pipe connected to an aluminum pipe discharge pipe, the geothermal heat exchange system is instantaneously heated by the heating pipe used as an auxiliary heating unit when the temperature of the geothermal heat exchange system is below a reference temperature so that the temperature of 1 to 2 degrees can be improved. The geothermal heat exchange system can perform heating and can reduce material costs by using the heat storage tank formed of steel to substitute the steel heat storage tank for reinforcing bars in existing construction in which the reinforcing bar is embedded into the bored ground and concrete is placed thereon. The geothermal heat exchange system can be applied to an urban small building, a sub-urban housing, a redevelopment house, and a vinyl greenhouse, so an application object can be widen.

Description

Technical Field [0001] The present invention relates to a geothermal heat exchange system using a central water tube,

In the present invention, a plurality of CIPs (cast inplace piles) are drilled at a depth of 8 to 10 m on the ground surface, and then a vertical pipe heat storage tank is installed in each of the CIP punched holes. An aluminum pipe in the form of a helical coil mounted in the vertical pipe heat storage tank By exchanging heat through the pipe, it is possible to reduce the construction and material cost, to reduce the noise caused by construction, and to replace the existing geothermal heat exchange system by drilling down to 150m below the existing ground, The same heating effect as that of the system can be obtained and the vertical tube heat storage tank is formed of the mixed water tank in which 10 to 30% of ethanol is mixed with water, thereby preventing the mixed water tank from freezing and improving the conductivity according to the geothermal exchange, By attaching the reflective insulation material and vinyl on both sides of the vertical pipe heat storage tank exposed to the outside of the ground, It is able to maintain a constant temperature and it is heated instantaneously by the heating cable which is used as auxiliary means of heating when the temperature is below the reference temperature by attaching the heating cable to the PVC pipe connected to the aluminum pipe discharge pipe, In addition, it is possible to solve the material cost reduction and heating at the same time by using the steel heat storage tank as a substitute for reinforcing steel in the existing building construction where piles are built by piercing down the ground and placing reinforcing bars and piling concrete. It is applicable to houses, redevelopment houses, and vinyl houses. Therefore, it is applicable to a geothermal exchange system using a wide range of centralized water straight pipe heat storage tanks.

Generally, geothermal energy refers to the heat energy stored in the rocks or rocks constituting the surface or in the fluid filling the cracks. Geothermal heat at a specific depth from the bottom of the earth maintains a constant temperature throughout the year. In places where the groundwater is abundant, the water temperature of the groundwater is utilized to cool and heat the building. In the case of lack of groundwater, pure soil and geothermal heat It is used for the heating and cooling of the building.

However, the heat exchange structure of the open geothermal system that performs the heating using the geothermal energy of the ground water has developed a geothermal or groundwater well with a depth of 300m to 500m, and an underwater motor pump is installed therein, Groundwater with a temperature of around 15 ° C is sent throughout the year, and groundwater, which has been heat-exchanged with the heat pump, is recovered back to the geothermal reservoir.

The conventional heat exchange structure of the geothermal system is disadvantageous in that the heat recovery efficiency of the geothermal heat is gradually reduced due to the groundwater being circulated while being continuously circulated through the geothermal heat pump and the heat pump,

For example, in summer, the groundwater in a state in which the temperature is raised by the heat pump is continuously returned to the inside of the trench, so that the temperature inside the trench is gradually increased. As a result, The thermal efficiency of the pump is lowered. In winter, the groundwater in a state where the temperature is lowered by the heat pump is continuously recovered to the inside of the trench, so that the temperature inside the trench is gradually lowered. As a result, the temperature of the groundwater undergoing thermal recovery is gradually lowered. Drop it.

Another problem of the heat exchange structure of such a geothermal system is that heat exchange is actively performed between the recovered ground water and the ground water to be supplied, thereby greatly reducing thermal efficiency.

In addition, the geothermal heating / cooling system is known as the most efficient and environmentally friendly method among the heating / cooling systems and is recognized as the most economical and effective method for reducing the emission of carbon dioxide causing global warming.

Geothermal heat is affected by the change of surface temperature up to about 10m underground, but when it goes down below it, it is hardly affected by surface temperature and maintains constant temperature throughout the year. The geothermal heating and cooling system utilizes infinite geothermal energy to supply energy for cooling and heating, and can be classified into a closed type and an open type depending on a heat source fluid transmission method that is introduced into the heat pump.

A closed geothermal system utilizes geothermal heat in a state where an underground heat exchanger composed of plastic pipe (HDPE) is buried in the ground to recover and dissipate heat. Unlike an open groundwater heat pump system, The circulating fluid is circulated through a closed heat exchanger buried in the ground and the heat is recovered from the ground or the heat is released to the ground. In the closed geothermal system, after the underground heat exchanger is installed in the ground, it is necessary to grouting the space of the underground heat exchanger and the perforation hole to prevent the inflow of surface water and the pollution of the underground environment. Such a closed geothermal system can be applied in an environment where groundwater can not be obtained, and has an advantage that it can be used without any environmental limitation due to the use of groundwater.

However, the closed geothermal system has disadvantages due to the activation of the supply despite the above advantages. For example, since the geothermal exchanger must be buried in the ground, the initial investment cost is large. In the narrow region, the ground for heat and air- A problem that must be ensured has arisen.

An open geothermal system is advantageous in that it can be used for drainage or other purposes by collecting and using lake, river and ground water. The initial installation cost is lower than that of the closed type and the system efficiency is high. However, since it has sufficient water resources, . The most stable and efficient system among the open geothermal systems is a well geothermal system that can prevent various pollutions of ground water and collapse of water wells by using only the thermal energy of water, , It is possible to supply stable and reliable thermal energy by using the ground water.

However, open geothermal systems are expensive to set up because they require large equipment as well as a lot of material cost to install.

Also, in the case of the geothermal geothermal system, large-scale equipment is needed to construct the geothermal exchange system, which requires heat exchange by drilling down to 150m below the ground, and noise is generated due to construction. There is a problem that it is difficult to apply.

Accordingly, a plurality of CIPs (cast inplace piles) are drilled at a depth of 8 to 10 m from the ground surface, and then a vertical pipe heat storage tank is installed in each CIP perforated pipe, and a spiral coil type aluminum pipe inlet pipe , It is possible to reduce the construction cost and material cost, reduce the noise caused by the installation, and reduce the noise level of the geothermal heat exchanger system It is possible to obtain the same heating effect and the vertical tube heat storage tank is formed of the mixed water tank in which 10 to 30% of ethanol is mixed with water, so that the mixed water tank can be prevented from freezing and the conductivity according to the geothermal heat exchange can be improved, Since the reflective thermal insulation material and vinyl are adhered to both sides of the exposed vertical pipe heat storage tank, Center of keeping the Figure is also a situation where the development of a geothermal exchange system using a vertical pipe heat storage tank is urgently required.

KR 10-2012-0018338 (Feb 23, 2012)

Accordingly, the present invention has been conceived to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for pouring a plurality of CIPs (cast inplace piles) down to 8 to 10 meters below the ground surface, By replacing the existing heat exchanger by drilling down to 150m from the ground by exchanging heat through the aluminum pipe inlet pipe in the form of helical coil mounted in the heat storage tank, it is possible to save the construction and material cost, And to provide a geothermal exchange system using the centralized water straight pipe heat storage tank which can achieve the same heating effect as the geothermal exchange system of the present invention.

It is another object of the present invention to provide a water purifier for preventing the freezing of the mixed water tank and improving the conductivity according to the geothermal heat exchange by forming the water vertical pipe heat storage tank into a mixed water tank containing 10 to 30% The present invention provides a geothermal exchange system using the geothermal heat exchanger.

Another object of the present invention is to provide a geothermal heat pipe which can maintain a constant temperature by keeping the inside of the vertical pipe heat storage tank by attaching the reflective heat insulator and the vinyl to both sides of the vertical pipe heat storage tank exposed to the outside of the ground, Exchange system.

Another object of the present invention is to provide a method of heating a PVC pipe connected to an aluminum pipe discharging pipe by heating cables by heating cables by a heating cable used as a heating auxiliary means when the temperature is below the reference temperature, The present invention provides a geothermal heat exchanging system using a central water tube.

Another object of the present invention is to provide a method for reducing the cost of materials and a method for simultaneously heating the steel by using a steel thermal storage tank as a substitute for reinforcing steel in the construction of existing buildings in which piles are pierced under the ground, And to provide a geothermal exchange system using an intraluminal heat storage tank.

It is another object of the present invention to provide a geothermal heat exchanging system using a centralized water straight tube storage tank that can be applied to a power house, a redevelopment house, and a vinyl house in addition to an urban small building.

According to another aspect of the present invention, there is provided a geothermal heat exchange system using a centralized water straight pipe heat storage tank, the method comprising the steps of: sucking thermal energy of ground water to heat exchange; A heat pump device for recovering the heat to the inside of the heat storage tank; A connection pipe connected to the heat pump device for allowing the heat-exchanged groundwater introduced through the heat pump device to flow into the inlet pipe inside the vertical pipe heat storage tank; A drain pipe connected to the inlet pipe and connected to a lower portion of the inlet pipe for allowing heat-exchanged groundwater to flow into the interior of the vertical pipe heat storage tank, and groundwater passing through the inside of the spiral coil, A cube-shaped steel bag backrest installed on the bottom of the ground where the inlet pipe and the discharge pipe are installed and the CIP (cast inplace pile) is pierced; A steel back tube vertically erected vertically in the direction of the paper from both sides of the steel back tube base and a steel back tube lid covering the steel back tube in which the inlet pipe and the discharge pipe are inserted is formed, A plurality of vertical tube heat storage tanks for forming the plurality of vertical tube heaters; A connection pipe connected to the discharge pipe for discharging the ground water whose temperature has risen through the discharge pipe of the vertical pipe heat storage tank; CIP perforation and grouting to prevent the temperature inside the vertical pipe heat storage tank from being affected by filling the space between the vertical pipe heat storage tank and the CIP perforated hole with cement; .

In the present invention, a reflective heat insulating material and vinyl which are attached to both side surfaces of a vertical pipe heat storage tank exposed to the outside of the ground to maintain a constant temperature through keeping warm inside the vertical pipe heat storage tank; Further comprising:

In the present invention, the groundwater, which is installed on one side of the connection pipe for the discharge pipe connected to the discharge pipe, passes through the vertical pipe heat storage tank is used as a heating auxiliary means when the reference temperature is not reached, Heating cable; Further comprising:

In the present invention, the material of the inlet pipe and the discharge pipe is aluminum, and the connecting pipe for the inlet pipe and the connecting pipe for the discharge pipe include aluminum or PVC.

In the present invention, the water tube is formed of a mixed water tank in which 10 to 30% of ethanol is mixed with water, and the mixed water tank is not frozen due to the mixing of 10 to 30% of ethanol, Is improved.

The geothermal exchange system using the centralized water straight pipe heat storage tank according to the present invention has the following effects.

First, according to the present invention, a plurality of CIPs (cast inplace piles) are punched down to a floor of 8 to 10 m from the ground, and then a vertical pipe heat storage tank is installed in each CIP pierced hole, and a spiral coil type aluminum By exchanging heat through the pipe inlet pipe, it is possible to reduce the construction and material cost, reduce the noise caused by the construction, The same heating effect as that of the geothermal exchange system can be obtained.

Secondly, since the water tube of the present invention is formed of the mixed water tank in which 10 to 30% of ethanol is mixed with water, the mixed water tank is prevented from freezing and the conductivity according to the geothermal heat exchange can be improved.

Third, the present invention can maintain a constant temperature by keeping the inside of the vertical pipe heat storage tank by attaching the reflective heat insulating material and vinyl on both sides of the vertical pipe heat storage tank exposed to the outside of the ground.

Fourth, according to the present invention, a heating cable is attached to a PVC pipe connected to an aluminum pipe discharge pipe, so that the heating cable can be instantaneously heated by a heating cable used as a heating auxiliary means under a reference temperature to improve the temperature by 1 to 2 degrees.

Fifth, according to the present invention, since a steel thermal storage tank is used as a substitute for reinforcing steel in a conventional building construction in which a pile is drilled down to a floor, concrete is poured, and a pile is poured, the material cost can be reduced and heating can be solved at the same time.

Sixth, since the present invention can be applied to power house, redevelopment house, and vinyl house in addition to an urban small building, its application is wide.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view for explaining a geothermal exchange system using a centralized water straight pipe heat storage tank according to an embodiment of the present invention; FIG.
2 is a cross-sectional view of a central-diagram water straight-tube heat storage tank according to an embodiment of the present invention.
3 is a plan view of a central-diagram water straight-tube heat storage tank according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, when it is determined that a detailed description of related art or configuration may unnecessarily obscure the gist of the present invention, The description below will be omitted, and the following terms are defined in consideration of the functions of the present invention, and this may vary depending on the intention or custom of the user, the operator, and the like. Therefore, the definition is based on the geothermal heat exchanging And should be based on the description throughout the present description of the system.

FIG. 1 is a view for explaining a geothermal exchange system using a centralized water straight tube heat storage tank according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a centralized water straight tube heat storage tank according to an embodiment of the present invention. And FIG. 3 is a plan view of a central-diagram water straight pipe heat storage tank according to an embodiment of the present invention.

The geothermal exchange system using the centralized water straight tube heat storage tank includes a heat pump apparatus A, a connection pipe 10 for a lead-in pipe, a straight pipe heat storage tank 20, a lead-in pipe 21, (50), CIP perforation and grouting (60), center pipe (23), steel back lid (24), discharge pipe (25), connecting pipe for discharge pipe A ground 70, a geothermal exchange system B, and the like.

As shown in FIG. 1, the geothermal exchange system (B) using the centralized water straight pipe heat storage tank sucks heat energy of ground water to perform heat exchange, and the heat exchanged ground water is supplied to the inside of the vertical pipe heat storage tank A heat pump apparatus (A) A connection pipe 10 connected to the heat pump device for allowing the heat-exchanged groundwater introduced through the heat pump device to flow into the inlet pipe inside the vertical pipe heat storage tank; An inlet pipe 21 connected to the inlet pipe and connected to the lower portion of the inlet pipe for allowing heat-exchanged groundwater to flow into the interior of the vertical pipe heat storage tank, A discharge pipe 25 for discharging a groundwater to the outside of the vertical pipe heat storage tank, and a U-shaped stainless steel pipe support base installed at the bottom of the ground in which the inlet pipe and the discharge pipe are inserted and a CIP (cast inplace pile) A steel back tube 23 vertically erected in the direction of the ground at both sides of the U-shaped steel bag back support, a steel back wall having a through hole into which the inlet pipe and the discharge pipe are inserted, A plurality of vertical tube heat storage tanks (20) composed of a white tube lid (24) and forming therein a mixing water tank (26); A connection pipe 30 connected to the discharge pipe for discharging the ground water whose temperature has risen through the discharge pipe of the vertical pipe heat storage tank; CIP punching and grouting (60) filling the space between the vertical pipe heat storage tank and the CIP perforated hole with cement so as not to affect the temperature inside the vertical pipe heat storage tank; Respectively.

The function of the technical means constituting the geothermal exchange system using the above described central-diagram water straight pipe heat storage tank will be described as follows.

The heat pump apparatus A sucks the heat energy of the ground water to perform heat exchange and returns the heat exchanged groundwater to the inside of the vertical pipe heat storage tank 20 through the connection pipe 10 for the inlet pipe.

The connecting pipe 10 for the inlet pipe is connected to the heat pump device A and heat exchanged groundwater passing through the heat pump device A flows into the inlet pipe 21 inside the vertical pipe heat storage tank 20 To be introduced.

A plurality of the straight pipe heat storage tanks 20 are provided and the inside of the straight pipe heat storage tanks 20 forms a mixed water tank, which is connected to the connecting pipe 10 for the inlet pipe. The heat-exchanged groundwater flows into the vertical pipe heat storage tank 20 A discharge pipe 25 connected to a lower portion of the inlet pipe 21 and discharging groundwater passing through the inside of the spiral coil to the outside of the vertical pipe heat storage tank 20, A C-shaped steel bag back support 22 mounted on the bottom of the central pouring base 70 which is inserted into the inlet pipe 21 and the discharge pipe 25 and which has a CIP (cast inplace pile) A steel back tube 23 vertically erected vertically in the direction of the paper from both sides of the U-shaped steel back support base 22; a steel back tube 23 having a through hole into which the inlet pipe 21 and the discharge pipe 25 are inserted And a steel back lid 24 covering the back pipe 23.

Here, the material of the inlet pipe 21 and the discharge pipe 25 is aluminum, and the material of the connecting pipe 10 for the inlet pipe and the connecting pipe 30 for the discharge pipe is aluminum or PVC, The steel back tube 23, and the steel back tube lid 24 are joined in the same manner as welding.

In addition, the inside of the vertical tube heat storage tank 20 is formed of a mixed water tank 26 in which 10 to 30% of ethanol is mixed with water, and the mixed water tank is not frozen due to the mixing of 10 to 30% Conductivity is improved.

The connection pipe 30 for the discharge pipe is connected to the discharge pipe 25 so that the ground water whose temperature is raised through the discharge pipe 25 of the vertical pipe heat storage tank 20 is discharged.

The CIP perforation and grouting 60 is to fill the space between the vertical pipe heat storage tank 20 and the CIP perforated hole with cement so as not to affect the temperature inside the vertical pipe heat storage tank 20. [

Here, the CIP (cast inplace pile) method is a method in which a hole formed by an opening or boring machine is treated with a stabilizing liquid or a casing and concrete is poured into the hole to form a hot wall in the ground, and each main heat must be continuously punched , Concrete is placed in the main heat after inserting reinforcing bars or H beams, so that it has more flexural rigidity than steel sheet pile or horizontal sheet pile and is advantageous not only in earth pressure and water pressure but also in equipment which can be completed easily in a short time. It is often used.

The reflective thermal insulation material and the vinyl 40 are attached to both sides of the vertical pipe heat storage tank 20 exposed to the outside of the ground so that a constant temperature can be maintained by keeping the inside of the vertical pipe storage tank 20 warm.

The heating cable 50 is mounted on one side of the discharge pipe connection pipe 30 connected to the discharge pipe 25 and groundwater passing through the vertical pipe heat storage tank 20 is used as a heating auxiliary means when the reference temperature is not reached, So that the temperature can be improved by 1 to 2 degrees.

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. It is not.

The geothermal exchange system using the centralized water straight pipe heat storage tank as described above can be applied to a power house, a redevelopment house, and a vinyl house in addition to an urban small building.

A: Heat pump device 10: Connecting pipe for inlet pipe
20: vertical pipe heat storage tank 21: inlet pipe
22: Steel bag backrest 23: Steel white bag
24: steel back lid 25: discharge pipe
26: mixing tank 30: connecting pipe for discharge pipe
40: Reflective insulation and vinyl 50: Heating cable
60: CIP perforation and grouting 70:
B: Geothermal exchange system

Claims (5)

In a geothermal exchange system using a centralized water straight pipe heat storage tank,
A heat pump device for sucking heat energy from the groundwater to perform heat exchange and recovering the heat-exchanged groundwater to the inside of the vertical pipe heat storage tank through a connecting pipe for the inlet pipe;
A connection pipe connected to the heat pump device for allowing the heat-exchanged groundwater introduced through the heat pump device to flow into the inlet pipe inside the vertical pipe heat storage tank;
A drain pipe connected to the inlet pipe and connected to the lower portion of the inlet pipe for allowing the heat exchanged ground water to flow into the interior of the vertical pipe heat storage tank and a groundwater passing through the inside of the spiral coil, A cube-shaped steel bag backrest installed on the bottom of the ground where the inlet pipe and the discharge pipe are installed and the CIP (cast inplace pile) is pierced; A steel back tube vertically erected vertically in the direction of the paper from both sides of the steel back tube base and a steel back tube lid covering the steel back tube in which the inlet pipe and the discharge pipe are inserted is formed, A plurality of vertical tube heat storage tanks for forming the plurality of vertical tube heaters;
A connection pipe connected to the discharge pipe for discharging the ground water whose temperature has risen through the discharge pipe of the vertical pipe heat storage tank;
CIP perforation and grouting to prevent the temperature inside the vertical pipe heat storage tank from being affected by filling the space between the vertical pipe heat storage tank and the CIP perforated hole with cement; Wherein the geothermal heat exchanger system is a geothermal heat exchanger system using a centralized water straight pipe heat storage tank. The method according to claim 1,
A reflective thermal insulator and vinyl which are attached to both sides of the vertical pipe heat storage tank exposed to the outside of the ground to maintain a constant temperature through the inside of the vertical pipe heat storage tank; Wherein the geothermal heat exchanger is a geothermal heat exchanger. The method according to claim 1,
A heating cable mounted on one side of a connection pipe for the discharge pipe connected to the discharge pipe and used as a heating auxiliary means when the ground water passing through the vertical pipe heat storage tank is below a reference temperature and can be instantaneously heated to improve the temperature by 1 to 2 °; Wherein the geothermal heat exchanger is a geothermal heat exchanger. The method according to claim 1,
Wherein the material of the inlet pipe and the discharge pipe is aluminum and the material of the connecting pipe for the inlet pipe and the connecting pipe for the discharge pipe is aluminum or PVC. The method according to claim 1,
The water in the vertical tube heat storage tank is formed of a mixed water tank in which 10 to 30% of ethanol is mixed with water, and the mixing water tank is not frozen due to the mixing of 10 to 30% of ethanol, thereby improving conductivity due to geothermal exchange. A geothermal heat exchanger system using a centralized water straight tube heat storage tank.

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