KR20130058148A - Heating and cooling system using space in abandoned mine - Google Patents

Abstract

PURPOSE: A cooling and heating system using a vacant place of a closed mine is provided to implement cooling and heating according to season using the homeothermy of mine drainage filling in the closed mine. CONSTITUTION: A cooling and heating system using a vacant place of a closed mine comprises closed type pipelines(21,22,23) and a heat pump(30). The closed type pipe lines are arranged through an area filled with mine drainage in the closed mine to allow heat exchange between mine drainage and heat transfer fluid which flows inside the closed type pipe lines. The heat pump is connected to both ends of the pipe lines and implements cooling or heating using the heat of the heat transfer fluid. [Reference numerals] (10) Heat exchange; (AA) Low temperature; (BB) High temperature

Description

Heating and Cooling System Using Space in Abandoned Mine

The present invention relates to a cooling and heating system using geothermal heat, and more particularly to a cooling and heating system utilizing a closed mine mining space for cooling and heating facilities around the abandoned mine using the heat of mine drainage filled in the mining space of the abandoned mine.

Recently, as the high oil price era enters with climate change, interest in renewable energy is increasing. Accordingly, development and distribution of renewable energy is expanding, and geothermal heating and cooling systems are in the spotlight.

Unlike other renewables such as solar or wind energy, geothermal energy has the advantage that it is not affected by climatic conditions. In addition, geothermal energy installations do not require large-scale sites, so they are easy to install and do not pollute the environment in the vicinity. The use of geothermal energy in homes, residential areas, swimming pools, aquaculture and other industrial facilities is expected to increase rapidly.

On the other hand, there are many types of geothermal sources in mines, but there are few research or development cases compared to other geothermal sources. The development of mines creates shafts, dead mines, underground mining cavities, and open-pit mining, depending on the type of development.

When the mine development is completed and the abandoned mine, groundwater or rainfall flows into the mining cavities and mines due to the interruption of the pumping work, and the mine drainage is leaked to the surface due to on-site hydraulic characteristics. Since the mine drainage of these mining cavities is placed in the underground space, it maintains a constant temperature regardless of the season. In other words, the mine drainage in the abandoned mine has a geothermal energy furnace, but studies and attempts to extract and use the mine are very insufficient in Korea.

An object of the present invention is to provide a cooling and heating system utilizing a closed mine mine space for economically heating and cooling facilities around the abandoned mine by utilizing mine drainage in the abandoned mine as a heat source.

The closed air-conditioning system according to the present invention for achieving the above object is to be installed in the abandoned mine to perform cooling and heating by using the mine drainage filled in the mine, the mining space as a heat source, the mine drainage and heat transfer fluid mutual heat exchange It is arranged to pass through the region filled with mine drainage in the abandoned mine, the closed pipeline in which the heat transfer fluid flows along the inside, and connected to both ends of the pipeline, respectively, using the heat retained by the heat transfer fluid It is provided with a heat pump for cooling or heating.

Open air-conditioning system according to the present invention for achieving the above object is to be installed in the abandoned mine to perform the cooling and heating by using the mine drainage, the mine drainage filled in the mine, mining space as a heat source, in order to pump the mine drainage in the abandoned mine An open pipeline having an inlet line having one end installed in the abandoned mine, an outlet line having one end installed in the abandoned mine for discharging the mine drainage back to the abandoned mine, and the mine drainage introduced through the inflow line; A heat exchanger for heat exchange between the heat transfer fluid and a heat pump for cooling or heating using heat retained by the heat transfer fluid heat exchanged in the heat exchanger.

In addition, in the open air conditioning system, the mine drainage is directly introduced into the heat pump without a heat exchanger to perform cooling and heating.

According to an embodiment of the present invention, the inflow line and the discharge line may be separately installed in separate mining spaces separated from each other in the abandoned mine.

In addition, the temperature of the mine drainage is in the range of 10 to 20 ° C.

In the present invention, by utilizing the fact that the mine drainage filled in the abandoned mine maintains a constant temperature, it is possible to perform the cooling and heating according to the season using this heat, there is an advantage that it is very economical energy utilization is possible.

In addition, there is an advantage that the mine is installed in the abandoned mine, so that a pipeline for suctioning and discharging the mine drainage can be easily installed.

1 is a schematic configuration diagram of a closed air-conditioning system using a mining space of the abandoned mine.
2 is a schematic configuration diagram of an open air conditioning system using a mining space of a closed mine.
Figure 3 is a schematic diagram of another embodiment of the open air conditioning system shown in FIG.
4 is a schematic diagram for explaining the principle of the heat pump.

Hereinafter, with reference to the accompanying drawings, it will be described in more detail with respect to the heating and cooling system (hereinafter referred to as 'cooling and heating system') using the mining space mined in accordance with an embodiment of the present invention.

The heating and cooling system according to the present invention can be classified into two types, a closed type and an open type. First, with reference to FIG. 1, a closed type is demonstrated. 1 is a schematic configuration diagram of a closed air-conditioning system using a mining space of the abandoned mine.

The closed air conditioning system shown in FIG. 1 is installed in the mining space 10 of the abandoned mine. That is, in order to perform cooling and heating using the mine drainage filled in the mine or the mining space of the abandoned mine as a heat source, the air conditioning system according to the present invention includes a closed pipeline (21, 22, 23) and the heat pump (30). .

Both ends of the pipeline are connected to the heat pump 30, which will be described later, to be separated from the mine drainage in the mining space (10). More specifically, the closed pipeline includes an inlet line 22 through which heat transfer fluid is transferred from the heat pump 30 toward the mining space 10, and extends from the inlet line 22 to heat transfer in the mining space 10. It consists of a heat exchange line (23) for heat exchange between the fluid and the mine drainage and a discharge line (21) extending from the heat exchange line (23) to transfer the heat transfer fluid back to the heat pump (30).

  As shown in FIG. 1, the heat exchange line 23 expands the contact area in the mining space 10 to sufficiently exchange heat between the mine drainage and the heat transfer fluid.

For example, in winter, the temperature of the mine drainage is higher than the atmospheric temperature, so that the relatively low heat transfer fluid enters the mining space 10 through the pipelines 21, 22, and 23, and exchanges heat with the mine drainage. Heated to the same or slightly lower temperature is discharged to the heat pump (30). Conversely, in summer, the heat transfer fluid, which is relatively hot, is heat-exchanged with the mine drainage, cooled to the same or slightly higher temperature than the mine drainage, and discharged by a heat pump.

The heat pump 30 performs heating or cooling using heat of a heat transfer fluid heated or cooled through heat exchange with a mine drainage. The heat pump 30 is a well-known apparatus and has various forms. A schematic configuration of a representative type heat pump is shown in FIG. 4.

Referring to FIG. 4, the heat pump 30 is largely composed of an evaporator, a compressor, a condenser, and an expansion valve. In the evaporator, a low-temperature, low-pressure refrigerant (mixed state of liquid and steam) absorbs heat from the heat transfer fluid, and then, in the compressor, the refrigerant transferred from the evaporator is compressed to form high-temperature and high-pressure steam. The high temperature, high pressure steam discharged from the compressor releases heat from the condenser to be used for heating and is transferred to the expansion valve as a high pressure liquid. In the expansion valve, the liquid refrigerant expands and is discharged in low temperature, low pressure steam and liquid state, and then flows back into the evaporator to form a cycle.

The heat pump absorbs heat from a low temperature heat source (mine drainage) and transmits it to a high temperature heat receiving body (indoor space, hot water, etc.). Power is required to operate the compressor, but it is used in cooling and heating systems because it supplies more thermal energy than the power used. And the case described above was a process of heating, the heat pump can be cooled by circulating the heat transfer fluid in the reverse direction to form a cycle.

In the present invention, the mine drainage is different depending on the depth of the mining space, but maintains the temperature range of about 10 ~ 20 ℃, COP 6.5 is about 30 ~ 40 ℃ using this heat in the heat pump 30 Heating water can be supplied to the abandoned mine area.

In order to supply heating water having the above-described temperature, the method using the mine drainage and the heat pump as in the present invention can reduce energy by 70% or more compared with the conventional method of heating by using natural gas, Carbon dioxide emissions can also be reduced by 20-40%.

Unlike the air-conditioning system using the closed pipeline of the above-described configuration, it is also possible to configure the air-conditioning system using an open pipeline for directly introducing and discharging the mine drainage.

A cooling and heating system of this type is shown in FIGS. 2 and 3.

FIG. 2 is a schematic configuration diagram of an open air conditioning system using a mining space of a closed mine, and FIG. 3 is a schematic configuration diagram of another embodiment of the open air conditioning system shown in FIG.

2 and 3, a heating and cooling system having an open pipeline includes an inlet line 41 and an outlet line 42. One end of the inflow line 41 is disposed in the mining spaces 10 and 12 filled with the mine drainage, and the mine drainage flows directly into the inflow line 41 through a pump or the like and is transferred to the heat exchanger 43.

In the heat exchanger 43, heat exchange is performed between the heat transfer fluid and the mine drainage, which form a cycle in the heat pump 30. If the heat exchange takes place for a sufficient time, the mine drainage is discharged back to the mining space (10, 11) through the discharge line (42).

The mining space (10, 11, 12) is a kind of heat storage tank and always maintains a constant temperature, so the temperature does not change due to heat exchange between the mine drainage and the heat transfer fluid.

As described above, in the case of the open heat exchanger, heat transfer efficiency is increased because the mine drainage is directly introduced into the heat exchanger to perform heat exchange.

2 and 3 are different from each other, in the case of the embodiment shown in FIG. 2, the mining space for introducing the mine drainage and the mining space for discharging are separated from each other. That is, in FIG. 2, both the inlet and the outlet are made in a single mining space, whereas in FIG. 3, the inlet and the outlet are made separately in a plurality of mining spaces.

Importantly, when draining the mine drainage after heat exchange, it is deeper than the depth at which the mine drainage is introduced. Because the temperature in the basement increases to the bottom (approximately 2-3 ° C per 100m), it is advantageous that the discharged mine drainage is discharged to a deep depth in order to be heated to the average temperature again.

2 and 3, the configuration of the heat pump 30 is the same as the embodiment described with reference to FIG. 1, and thus description thereof will be omitted.

As described above, in the present invention, by using heat of an open or closed pipeline and a heat exchanger, the heat of the mine drainage is supplied to the heat pump, thereby economically heating and cooling the abandoned mine area.

The tunnel or mining space of the abandoned mine is filled with mine drainage by sewage or rainfall, and is located in the basement and maintains constant temperature, so it is a very suitable condition for heating and cooling using a heat pump. In addition, since the tunnel leading to the mining space is already formed, it is easy to install the pipeline, so there is an advantage in economical installation.

Therefore, it is expected that economical energy use is possible in the abandoned mine area by using the heating and cooling system according to the present invention.

Claims (5)

It is installed in the abandoned mine in order to perform cooling and heating using the mine drainage filled in the mine of mine, the mining space as a heat source,
A closed pipeline in which the mine drainage and the heat transfer fluid pass through a region filled with the mine drainage in the abandoned mine, and the heat transfer fluid flows along the inside thereof;
And a heat pump connected to both ends of the pipeline and configured to perform cooling or heating using heat retained by the heat transfer fluid. It is installed in the abandoned mine in order to perform cooling and heating using the mine drainage filled in the mine of mine, the mining space as a heat source,
An open pipeline having an inflow line having one end installed in the abandoned mine for pumping in and drawing out the mine drainage in the abandoned mine, and an exhaust line having one end installed in the abandoned mine for discharging the mine drainage back to the abandoned mine;
A heat exchanger for exchanging heat between the mine drainage and the heat transfer fluid introduced through the inlet line;
And a heat pump for cooling or heating by using the heat retained by the heat transfer fluid heat-exchanged in the heat exchanger. It is installed in the abandoned mine in order to perform cooling and heating using the mine drainage filled in the mine of mine, the mining space as a heat source,
An open pipeline having an inflow line having one end installed in the abandoned mine for pumping in and drawing out the mine drainage in the abandoned mine, and an exhaust line having one end installed in the abandoned mine for discharging the mine drainage back to the abandoned mine;
And a heat pump for cooling or heating by using the heat retained by the mine drainage introduced through the inflow line. The method according to claim 2 or 3,
The mining space in the abandoned mine in which the inflow line is installed, and the mining space in the abandoned mine in which the discharge line is installed are separate spaces separated from each other. 4. The method according to any one of claims 1 to 3,
The temperature of the mine drainage is a heating and cooling system utilizing the mining space of the mining mine, characterized in that the range of 10 ~ 20 ℃.

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