KR102662170B1 - Regenerative heat pump system comprising geothermal exchanger - Google Patents

Abstract

The present invention provides a regenerative heat pump system including an underground heat exchanger. One aspect of a regenerative heat pump system including a ground heat exchanger according to an embodiment of the present invention includes a first load that operates selectively; a heat battery storing heat exchange fluid for heat exchange with the first load; at least one underground heat exchanger in which the heat exchange fluid stored in the heat battery circulates between the heat batteries and exchanges heat with the ground; The heat battery includes: a first area where the heat exchange fluid is stored; and a second area storing the heat exchange fluid that is selectively mixed with the heat exchange fluid stored in the first area. Includes.

Description

Regenerative heat pump system including a ground heat exchanger {REGENERATIVE HEAT PUMP SYSTEM COMPRISING GEOTHERMAL EXCHANGER}

The present invention relates to a regenerative heat pump system including an underground heat exchanger.

An underground heat exchanger is one in which a heat exchange fluid such as groundwater buried in the ground and flowing inside exchanges heat with the ground. A heat storage type heat pump system including an underground heat exchanger that utilizes energy from the ground has been proposed. Referring to the prior patent document (Korean Patent Registration No. 1415972), conventionally, in a state where the energy received from the geothermal supply unit 80 is stored in the first and second heat storage units 30 and 40, the first and second heat storage units 30 and 40 Depending on the temperature of the second heat storage units 30 and 40, energy is transferred from the first and second heat storage units 30 and 40 to the buffer tank 10 through the geothermal heat pump 20, or the heat storage tank ( 60) or is delivered to the geothermal supply unit 80.

As such, conventionally, the energy received from the geothermal supply unit 80 is simply stored in the first and second heat storage units 30 and 40. Additionally, in the related art, heat is exchanged while the heat source always passes through the first and second heat storage units 30 and 40 connected in series. Therefore, conventionally, the energy stored in the first and second heat storage units 30 and 40 cannot be utilized more actively and efficiently.

Republic of Korea Patent Publication No. 1299519 (Name: Geothermal complex system for hot water supply only) Republic of Korea Patent Publication No. 2044681 (Name: Storage heat pump system including underground heat exchanger) Republic of Korea Patent Publication No. 2118321 (Name: Storage heat pump system including underground heat exchanger) Republic of Korea Patent Publication No. 2138712 (Name: Absence of heat axial heat)

The present invention is intended to solve the problems of the prior art as described above, and the purpose of the present invention is to provide a heat storage type heat pump including an underground heat exchanger configured to more actively and efficiently utilize the excess energy accumulated in the heat battery. To provide a system.

One aspect of a regenerative heat pump system including a ground heat exchanger according to an embodiment of the present invention for achieving the above-described object includes: a first load that operates selectively; a heat battery storing heat exchange fluid for heat exchange with the first load; at least one underground heat exchanger in which the heat exchange fluid stored in the heat battery circulates between the heat batteries and exchanges heat with the ground; The heat battery includes: a first area where the heat exchange fluid is stored; and a second area storing the heat exchange fluid that is selectively mixed with the heat exchange fluid stored in the first area. Includes.

In one aspect of the embodiment of the present invention, the heat exchange fluid stored in the first area exchanges heat with the first load while circulating between the first load and the first area when the first load operates, or the heat exchange fluid stored in the first area circulates between the first load and the first area. Before the first load operates, heat is exchanged with the ground while circulating between the first area and the underground heat exchanger, and then when the first load operates, heat is exchanged with the first load while circulating between the first load and the first area. Alternatively, when the first load operates, heat is exchanged with the first load while circulating between the first load, the second region, and the first region to be mixed with the heat exchange fluid stored in the second region.

In one aspect of an embodiment of the present invention, the heat exchange fluid stored in the first area is stored in the first load and the first area when the first load operates when the temperature is higher than the preset first load lower limit temperature. heat is exchanged with the first load while circulating between the two, and if the temperature is less than the first load lower limit temperature, the temperature increases while passing through the underground heat exchanger before the first load operates to the first load lower limit temperature. Heat is exchanged with the ground until the above temperature is reached.

In one aspect of an embodiment of the present invention, the heat exchange fluid stored in the first area circulates between the first load and the first area and exchanges heat with the first load to increase its temperature to the first load lower limit temperature. When the temperature exceeds the preset first load upper limit temperature, the first load circulates between the first load, the second region, and the first region to be mixed with the heat exchange fluid stored in the second region. heat is exchanged with

One aspect of the embodiment of the present invention further includes a second load that operates selectively regardless of the operation of the first load, wherein the first load is the heat exchange fluid stored in the first area or the second load. Heat is exchanged with the heat exchange fluid stored in the first region mixed with the heat exchange fluid stored in, and the second load exchanges heat only with the heat exchange fluid stored in the second region.

In one aspect of the embodiment of the present invention, the heat exchange fluid stored in the second area is, when the first load operates, the heat exchange fluid stored in the first load according to the temperature of the heat exchange fluid stored in the first area. is mixed with and circulates between the first load, the second area, and the first area to exchange heat with the first load, or when the second load operates, the second load circulates between the second load and the second area. When heat is exchanged with a load or when the first and second loads are operating, a portion of the heat exchange fluid is mixed with the heat exchange fluid circulating between the first load and the first region. It circulates and exchanges heat with the first load, and the remainder exchanges heat with the second load while circulating between the second load and the second area.

In one aspect of the embodiment of the present invention, the heat exchange fluid stored in the second region is used only when the temperature of the heat exchange fluid stored in the first region increases and reaches a temperature equal to or higher than the preset first load upper limit temperature. When the first load operates, it is mixed with the heat exchange fluid stored in the first area and circulates between the first load, the second area, and the first area to exchange heat with the first load, and the second load whose temperature is preset When the load is below the upper limit temperature, when the second load operates, heat is exchanged with the second load while circulating between the second load and the second area, and the temperature of the heat exchange fluid stored in the first area increases. When the first and second loads are operated only when the temperature reaches a temperature equal to or higher than the set first load upper limit temperature and the temperature is equal to or higher than the preset second load upper limit temperature, a portion of the heat exchange fluid stored in the first area and It is mixed and circulates between the first load, the second area, and the first area to exchange heat with the first load, and the remainder circulates between the second load and the second area to exchange heat with the second load.

In one aspect of the embodiment of the present invention, the heat battery includes: a battery housing defined inside such that the first and second regions are partitioned from each other; an axial heat dissipation member disposed in the first area and in which the axial heat dissipation fluid sealed therein exchanges heat with the heat exchange fluid stored in the first area; a first inlet pipe for the first load through which the heat exchange fluid is introduced from the first load to the first area; a second inlet pipe for the first load through which the heat exchange fluid is introduced from the first load to the second area; a first load discharge pipe through which the heat exchange fluid is discharged from the first area to the first load; an outlet pipe for an underground heat exchanger through which the heat exchange fluid is withdrawn from the first area to the underground heat exchanger; a supply pipe through which the heat exchange fluid stored in the second area is supplied to the first area; and an opening/closing valve that selectively opens and closes the supply pipe. Includes.

In one aspect of the embodiment of the present invention, the outlet pipe for the underground heat exchanger is branched from one side of the outlet pipe for the first load.

In one aspect of the embodiment of the present invention, the outlet pipe for the second load is disposed to penetrate the first area, and the supply pipe is branched from one side of the outlet pipe for the second load and extends into the first area. do.

In one aspect of the embodiment of the present invention, the opening/closing valve opens the supply pipe only when the inside of the first area is at negative pressure and the inside of the second area is at positive pressure.

Another aspect of a regenerative heat pump system including an underground heat exchanger according to an embodiment of the present invention includes first and second loads operating independently of each other; A first area where the heat exchange fluid for heat exchange with the first load is stored, and a second area for storing the heat exchange fluid for heat exchange with the first load by being mixed with the heat exchange fluid stored in the first area or for heat exchange with the second load. Heat battery containing area; at least one underground heat exchanger in which the heat exchange fluid stored in the heat battery circulates between the heat batteries and exchanges heat with the ground; a first pump that pumps the heat exchange fluid to circulate between the first load and the first zone or to circulate between the first load, the second zone, and the first zone; a second pump that circulates between the first load, the first area, and the underground heat exchanger; a third pump that pumps the heat exchange fluid so that it circulates between the second load and the second area; and the heat exchange fluid circulates between the first load and the first zone, or the heat exchange fluid circulating between the first load and the first zone selectively passes through the underground heat exchanger, or the first load, the second zone, and A control valve that controls circulation between the first areas; Includes.

In another aspect of an embodiment of the present invention, the first and second pumps operate alternatively, and the third pump operates independently of the first and second pumps.

In another aspect of an embodiment of the present invention, the heat exchange fluid pumped by the first pump circulates between the first load and the first area or circulates between the first load and the second area according to control by the control valve. The heat exchange fluid that circulates between the zone and the first zone and is pumped by the second pump circulates between the first load, the first zone, and the underground heat exchanger according to control by the control valve, The heat exchange fluid pumped by the third pump circulates between the second load and the second region regardless of control by the control valve.

In another aspect of the embodiment of the present invention, when the temperature of the heat exchange fluid stored in the first area is higher than the preset first load lower limit temperature, when the first load operates, the first pump operates, and the control The valve controls the heat exchange fluid pumped by the first pump to circulate between the first load and the first region, and when the temperature of the heat exchange fluid stored in the first region is less than the first load lower limit temperature. In this case, the second pump operates before the first load operates, and the control valve increases until the temperature of the heat exchange fluid stored in the first area reaches a temperature equal to or higher than the first load lower limit temperature. The heat exchange fluid pumped by the second pump is controlled to pass through the underground heat exchanger.

In another aspect of the embodiment of the present invention, the heat exchange fluid stored in the first area circulates between the first load and the first area and exchanges heat with the first load, thereby increasing the temperature and exceeding the lower limit temperature of the first load. When the temperature reaches a temperature exceeding the preset first load upper limit temperature, the first pump continues to operate, and the control valve controls the heat exchange fluid pumped by the first pump to the first load, the first load, and the second load. It is controlled to circulate between the second area and the first area to mix with the heat exchange fluid stored in the second area.

In another aspect of the embodiment of the present invention, the heat battery includes a battery housing defined inside such that the first and second regions are partitioned from each other; an axial heat dissipation member disposed in the first area and in which the axial heat dissipation fluid sealed therein exchanges heat with the heat exchange fluid stored in the first area; a first inlet pipe for the first load through which the heat exchange fluid is introduced from the first load to the first area; a second inlet pipe for the first load through which the heat exchange fluid is introduced from the first load to the second area; a first load discharge pipe through which the heat exchange fluid is discharged from the first area to the first load; an outlet pipe for an underground heat exchanger through which the heat exchange fluid is withdrawn from the first area to the underground heat exchanger; a second load inlet pipe through which the heat exchange fluid is introduced from the second load to the second area; a second load discharge pipe through which the heat exchange fluid is discharged from the second area to the second load; a supply pipe through which the heat exchange fluid stored in the second area is supplied to the first area; and an opening/closing valve that selectively opens and closes the supply pipe. Includes.

In another aspect of the embodiment of the present invention, both ends of the second inlet pipe for the first load are connected to one side of the first inlet pipe for the first load and the inlet pipe for the second load, respectively.

In another aspect of the embodiment of the present invention, the outlet pipe for the underground heat exchanger is branched from one side of the outlet pipe for the first load.

In another aspect of the embodiment of the present invention, the outlet pipe for the second load is disposed to penetrate the first area, and the supply pipe is branched from one side of the outlet pipe for the second load and extends into the first area. do.

In another aspect of the embodiment of the present invention, the opening/closing valve opens the supply pipe only when the inside of the first area is at negative pressure and the inside of the second area is at positive pressure.

In aspects of the embodiment of the present invention, an axial heat dissipation member is disposed in the first region, in which a axial heat dissipation fluid sealed therein exchanges heat with the heat exchange fluid.

In the regenerative heat pump system including an underground heat exchanger according to an embodiment of the present invention, energy accumulated in the heat battery is selectively transferred to the first and second loads. In particular, in an embodiment of the present invention, the interior of the heat battery is divided into first and second regions where heat exchange fluid is stored, respectively, and the temperature of the heat exchange fluid stored in the first and second regions and the first and second loads In preparation for the required optimal temperature, the heat exchange fluids stored in the first and second areas are independently heat exchanged with the first and second loads, or the heat exchange fluids stored in the first and second areas are mixed or independently used with the first load or the second load. Heat is exchanged with the second load. Therefore, according to the embodiment of the present invention, it is possible to expect the effect of utilizing the excess energy accumulated in the heat battery more actively and efficiently.

1 is a configuration diagram showing a regenerative heat pump system including an underground heat exchanger according to an embodiment of the present invention.
2 to 5 are fluid flow diagrams showing the flow of fluid in a regenerative heat pump system including an underground heat exchanger according to an embodiment of the present invention.

Hereinafter, the configuration of a regenerative heat pump system including an underground heat exchanger according to an embodiment of the present invention will be described in more detail with reference to the attached drawings.

Figure 1 is a configuration diagram showing a regenerative heat pump system including an underground heat exchanger according to an embodiment of the present invention.

Referring to FIG. 1, the regenerative heat pump system 1 (hereinafter referred to as 'heat pump system') including an underground heat exchanger according to this embodiment includes first and second loads 110 and 120, heat It includes a battery 200, an underground heat exchanger 300, first to third pumps (P1) (P2) (P3), and a control valve (V). In particular, in this embodiment, the heat exchange fluid is partitioned and stored in the heat battery 200, and heat is selectively exchanged with the first and second loads 110 and 120 according to its temperature.

More specifically, the first and second loads 110 and 120 operate independently of each other, and heat is generated during their operation. In particular, in this embodiment, heat generated during the operation of the first and second loads 110 and 120 is heat exchanged with the heat battery 200 through the heat exchange fluid. In addition, the first and second loads 110 and 120 may be distinguished by having different temperatures of the heat exchange fluid with which they are heat-exchanged to ensure normal operation or operational efficiency. For example, when the first and second loads 110 and 120 are air conditioners and fan coils, the first load 110 determines the efficiency of the refrigeration cycle, especially the optimal suction temperature of the compressor. Considering that the temperature of the heat exchange fluid that exchanges heat with the condenser is excessively low or high, the refrigeration cycle may operate abnormally or its efficiency may be reduced. On the other hand, a fan coil that performs air conditioning simply by heat conduction with air is more advantageous in cooling mode when the temperature of the heat exchange fluid with which it exchanges heat is lower, and in heating mode, the temperature of the heat exchange fluid with which it heat exchanges is higher. The more it is, the more advantageous it will be.

Hereinafter, when the first and second loads 110 and 120 are operated in cooling mode in consideration of the temperature to ensure normal operation or operational efficiency of the first and second loads 110 and 120. Explain. Therefore, when the first load 110 operates in a cooling mode, the temperature of the heat exchange fluid that exchanges heat with the first load 110 is equal to or higher than the preset first load lower limit temperature (Td1) and the first load 110 is operated in a cooling mode. It is explained that normal operation or operational efficiency of the first load 110 can be secured in a temperature range below the upper limit temperature Tu1. And when the second load 120 operates in a cooling mode, the temperature of the heat exchange fluid that exchanges heat with the second load 120 is within a temperature range below the preset second load upper limit temperature Tu2. It is explained that normal operation or operational efficiency of the second load 120 can be secured. For example, the first load lower limit temperature (Td1) can be set to 7 degrees Celsius, and the first load upper limit temperature (Tu1) and the second load upper limit temperature (Tu2) can each be set to 15 degrees Celsius. there is.

In addition, the heat battery 200 stores a heat exchange fluid that exchanges heat with the first and second loads 110 and 120, and may be buried in the ground, for example. In particular, in this embodiment, the heat battery 200 includes first and second areas 200A and 200B. In the first area 200A, a heat exchange fluid that exchanges heat with the first load 110 is stored, and in the second area 200B, a heat exchange fluid that exchanges heat with the second load 120 or is stored in the first area 200A ) The heat exchange fluid that is mixed with the heat exchange fluid stored in and exchanges heat with the first load 110 is stored. The specific configuration of the heat battery 200 will be described later.

Next, the underground heat exchanger 300 is buried in the ground, and includes at least one unit in which the heat exchange fluid stored in the heat battery 200 circulates between the heat battery 200 and exchanges heat with the ground. do. For example, the underground heat exchanger 300 may be buried in a hole drilled in the excavated ground, and the heat battery 200 is placed in the ground above the hole in which the underground heat exchanger 300 is buried. ) is landfilled, so separate construction work for landfill of the heat battery 200 can be eliminated.

The first to third pumps P1, P2, and P3 pump the heat exchange fluid so that it circulates in the heat pump system 1. That is, the first pump (P1) circulates the heat exchange fluid between the first load 110 and the first area 200A or the first load 110, the second area 200B, and the first area 200A. It is pumped to circulate between areas 200A. And the second pump (P2) pumps the heat exchange fluid to circulate between the first load (110), the first area (200A) and the underground heat exchanger (300), and the third pump (P3) pumps the heat exchange fluid. is pumped to circulate between the second load 120 and the second area 200B.

In this embodiment, the first and second pumps (P1) (P2) operate alternatively, and the third pump (P3) operates independently of the first and second pumps (P1) (P2). It works. However, the third pump (P3) operates only when the temperature of the heat exchange fluid stored in the second area (200B) is below the second load upper limit temperature (Tu2) to The heat exchange fluid circulating between the two areas 200B is pumped.

Meanwhile, the control valve (V) controls circulation of the heat exchange fluid in the heat pump system (1). More specifically, the control valve (V) circulates the heat exchange fluid between the first load 110 and the first area 200A or between the first load 110 and the first area 200A. The heat exchange fluid circulating is controlled to selectively pass through the underground heat exchanger 300 or circulate between the first load 110, the second area 200B, and the first area 200A. Control of the circulation of the heat exchange fluid in the heat pump system 1 according to the control valve V is determined by determining whether the first and second loads 110 and 120 are operating and the first and second loads 110 and 120. This is done according to the temperature of the heat exchange fluid stored in the second area (200A) (200B), especially the first area (200A).

More specifically, when the temperature of the heat exchange fluid stored in the first area 200A is higher than the preset first load lower limit temperature Td1, when the first load 110 operates, the first pump ( P1) operates to pump the heat exchange fluid to circulate in the heat pump system (1). At this time, the control valve (V) controls the heat exchange fluid pumped by the first pump (P1) to circulate between the first load (110) and the first area (200A).

On the other hand, when the temperature of the heat exchange fluid stored in the first area (200A) is less than the first load lower limit temperature (Td1), the temperature of the heat exchange fluid stored in the first area (200A) is lower than the first load lower limit temperature (Td1). Let it increase above the lower limit temperature (Td1). However, the heat exchange fluid stored in the first and second areas 200A and 200B is relatively inexpensive, considering the characteristics of the first and second loads 110 and 120 that operate mainly during the day. The temperature can be reduced in advance by using electric power or renewable energy. When water is used as the heat exchange fluid, the temperature of the heat exchange fluid stored in the first and second areas 200A and 200B can be reduced in advance by about 5 degrees Celsius.

Meanwhile, as described above, when the first load 110 exchanges heat with the heat exchange fluid below the first load lower limit temperature Td1, it may be disadvantageous to ensure normal operation or operating efficiency. Therefore, in this embodiment, the second pump (P2) operates before the first load 110 operates, and the control valve (V) operates on the second pump (P2). The heat exchange fluid pressured is controlled to pass through the underground heat exchanger (300).

However, since the ground in which the ground heat exchanger 300 is buried is generally maintained at around 15 degrees Celsius, the temperature of the heat exchange fluid passing through the ground heat exchanger 300 will increase. And the control valve (V) increases the temperature of the heat exchange fluid stored in the first area (200A) until it reaches a temperature above the first load lower limit temperature (Td1), for example, 7 degrees Celsius. 2The heat exchange fluid pumped by the pump (P2) passes through the underground heat exchanger 300 and substantially circulates between the first load 110, the first area 200A, and the underground heat exchanger 300. Control it to do so.

Meanwhile, when the heat exchange fluid stored in the first area 200A circulates between the first load 110 and the first area 200A and exchanges heat with the first load 110, its temperature increases. . In this embodiment, when the temperature of the heat exchange fluid stored in the first area 200A reaches a temperature exceeding the first load upper limit temperature Tu1, the first pump P1 continues to operate. , the control valve (V) circulates the heat exchange fluid pumped by the first pump (P1) between the first load (110), the second area (200B), and the first area (200A). The heat exchange fluid circulating between the first load 110 and the first area 200A is controlled to be mixed with the heat exchange fluid stored in the second area 200B. However, since the heat exchange fluid stored in the second area (200B) is partitioned from the heat exchange fluid stored in the first area (200A), its temperature is increased by heat exchange with the first load (110). Compared to the heat exchange fluid stored in the first area 200A, the temperature is maintained at a relatively low temperature, that is, 5 degrees Celsius. Therefore, in this embodiment, the heat exchange fluid stored in the first region 200A is mixed with the heat exchange fluid stored in the second region 200B, that is, the first load 110 and the first region The temperature of the heat exchange fluid circulating between 200A is lowered below the first load upper limit temperature Tu1. However, the heat exchange fluid circulating between the first load 110 and the first area 200A is mixed with the heat exchange fluid stored in the second area 200B. This is achieved only when the temperature of the heat exchange fluid stored in is less than the second load upper limit temperature Tu2.

Meanwhile, the heat battery 200 includes a battery housing 210, a axial heat dissipation member 220, a first lead-in pipe 231 for the first load, a second lead-in pipe 232 for the first load, and a first load. It includes an outlet pipe 240 for an underground heat exchanger, an outlet pipe 250 for an underground heat exchanger, an inlet pipe 260 for a second load, an outlet pipe 270 for a second load, a supply pipe 280, and an opening/closing valve 290.

More specifically, the battery housing 210 is a place where the heat exchange fluid is stored, and inside the battery housing 210, the first and second regions 200A and 200B are partitioned from each other. ) is defined. The heat exchange fluid is stored in the first and second areas 200A and 200B, respectively. However, in this embodiment, the heat exchange fluid stored in the first area 200A is selectively mixed with the heat exchange fluid stored in the second area 200B.

The axial heat dissipation member 220 is disposed in the first area 200A in which the axial heat dissipation fluid sealed therein exchanges heat with the heat exchange fluid stored in the first area 200A. For example, a phase change material (PCM) that absorbs or releases heat while changing phase depending on the external temperature may be used as the axial heat dissipation fluid sealed inside the heat axial heat dissipation member 220.

The first inlet pipe 231 for the first load is where the heat exchange fluid is introduced from the first load 110 to the first area 200A, and the second inlet pipe 232 for the first load is is a place where the heat exchange fluid is introduced from the first load 110 to the second area 200B. And the first load discharge pipe 240 and the underground heat exchanger discharge pipe 250 allow the heat exchange fluid to flow from the first area 200A to the first load 110 or the underground heat exchanger 300. This is where it is withdrawn.

The inlet pipe 260 for the second load and the outlet pipe 270 for the second load allow the heat exchange fluid to be introduced from the second load 120 to the second area 200B or to the second area 200B. ) is where the heat exchange fluid is withdrawn from the second load 120. Additionally, the supply pipe 280 is where the heat exchange fluid stored in the second area 200B is supplied to the first area 200A.

In particular, in this embodiment, both ends of the second inlet pipe 232 for the first load are on one side of the first inlet pipe 231 for the first load and the inlet pipe 260 for the second load, respectively. connected. That is, the heat exchange fluid flowing from the first load 110 to the second area 200B is the first inlet pipe 231 for the first load, the second inlet pipe 232 for the first load, and The inlet pipe 260 for the second load flows sequentially.

And the outlet pipe 250 for the underground heat exchanger is branched from one side of the outlet pipe 240 for the first load. Accordingly, the heat exchange fluid drawn from the first area 200A to the underground heat exchanger 300 sequentially flows through the first load outlet pipe 240 and the underground heat exchanger outlet pipe 250.

Meanwhile, the second load discharge pipe 270 is disposed through the first area 200A, and the supply pipe 280 is branched from one side of the second load discharge pipe 270 to It extends to the first area (200A). Accordingly, the heat exchange fluid stored inside the second area 200B flows through the second load discharge pipe 270 and is drawn out to the second load 120 or the second load discharge pipe 270. ) and can be supplied to the first area (200A) by flowing through the supply pipe 280.

The opening/closing valve 290 selectively opens and closes the supply pipe 280. Therefore, substantially, the heat exchange fluid stored inside the second area 200B flows through the supply pipe 280 and is selectively supplied to the first area 200A.

Additionally, the opening/closing valve 290 opens the supply pipe 280 only when the inside of the first area 200A is at negative pressure and the inside of the second area 200B is at positive pressure. In other words, the opening/closing valve 290 allows the heat exchange fluid pumped by the first pump (P1) to be moved to the first load 110, the second area 200B, and the first load 110 by the control valve V. The supply pipe 280 is opened by the opening/closing valve 290 only when it is controlled to circulate in area 1 (200A).

Hereinafter, the operation of a regenerative heat pump system including a ground heat exchanger according to an embodiment of the present invention will be described in more detail with reference to the attached drawings.

2 to 5 are fluid flow diagrams showing the flow of fluid in a regenerative heat pump system including an underground heat exchanger according to an embodiment of the present invention.

First, referring to FIG. 2, when the temperature of the heat exchange fluid stored in the first area 200A is above the preset first load lower limit temperature Td1, that is, 7 degrees Celsius, when the first load 110 operates, , the first pump (P1) operates. And the control valve V controls the heat exchange fluid stored in the first area 200A to circulate between the first load 110 and the first area 200A. Therefore, heat exchange occurs between the first load 110 and the first area 200A via the heat exchange fluid, so that heat generated during the operation of the first load 110 is transferred to the heat battery 200. It is delivered.

Meanwhile, when the temperature of the heat exchange fluid stored in the first area (200A) is less than the first load lower limit temperature (Td1), that is, 5 degrees Celsius, during heat exchange of the first load (110), the first load (110) This may result in abnormal operation of load 110 or a decrease in its operating efficiency. Therefore, referring to FIG. 3, in this case, the heat exchange fluid stored in the first area 200A passes through the underground heat exchanger 300 and is transferred to the ground at a relatively low temperature, for example, around 15 degrees Celsius. and heat exchange so that the temperature is reduced in advance.

That is, in a state where the heat exchange fluid stored in the first load 110 is controlled by the control valve (V) to pass through the underground heat exchanger 300, the first load 110 is operated before the first load 110 operates. 2Pump (P2) operates. Therefore, substantially, the heat exchange fluid pumped by the second pump (P2) circulates between the first load 110, the first area 200A, and the underground heat exchanger 300 and exchanges heat with the ground. The temperature increases. And when the temperature of the heat exchange fluid stored in the first area 200A increases and reaches a temperature above the first load lower limit temperature Td1, for example, 7 degrees Celsius, which is the first load lower limit temperature Td1, As shown in 2, in a state where the heat exchange fluid is controlled to circulate between the first load 110 and the first area 200A by the control valve V, the first pump P1 It works.

Next, referring to FIG. 4, the temperature of the heat exchange fluid stored in the first area (200A) increases due to heat exchange between the first load 110 and the first area (200A), thereby increasing the preset first load. When the temperature reaches the upper limit temperature Tu1 or higher, the heat exchange fluid pumped by the first pump P1 is mixed with the heat exchange fluid stored in the second region 200B, which has a relatively low temperature. That is, in a state where the heat exchange fluid is controlled to circulate between the first load 110, the second area 200B, and the first area 200A by the control valve V, the first pump P1 ) works. Of course, this only occurs when the temperature of the heat exchange fluid stored in the second area 200B is less than the preset second load upper limit temperature Tu2.

Meanwhile, regardless of whether the first load 110 operates and the temperature of the heat exchange fluid stored in the first area 200A, when the second load 120 operates, the second load 120 is operated through the heat exchange fluid. As heat exchange occurs between the load 120 and the second area 200B, heat generated during the operation of the second load 120 is transferred to the heat battery 200. Referring to FIG. 5 , when the third pump P3 operates for this purpose, the heat exchange fluid pumped by it circulates between the second load 120 and the second area 200B. In Figure 5, the circulation of the heat exchange fluid between the first load 110 and the first area 200A and the circulation of the heat exchange fluid between the second load 120 and the second area 200B are shown in Figure 5. This is shown to be done, as shown in Figures 3 and 4. The circulation of the heat exchange fluid between the second load 120 and the second area 200B is between the first load 110, the first area 200A and the underground heat exchanger 300 or the first load 110. This may occur simultaneously with the circulation of the heat exchange fluid between the load 110, the second area 200B, and the first area 200A.

Within the scope of the basic technical idea of the present invention, many other modifications are possible for those skilled in the art, and the scope of the present invention should be interpreted based on the appended claims. will be.

110, 120: load 200: heat battery
200A, 200B: Area 210: Battery housing
220: Axial heat dissipation member 231: First lead pipe for first load
232: Second inlet pipe for first load 240: Output pipe for first load
250: Outlet pipe for underground heat exchanger 260: Inlet pipe for second load
270: lead-out pipe for second load 280: supply pipe
290: Open/close valve 300: Underground heat exchanger
P1, P2, P3: pump V: control valve

Claims (22)

First and second loads 110 and 120 operating independently of each other;
A heat battery 200 that stores heat exchange fluid for heat exchange with the first load 110;
At least one underground heat exchanger (300) in which the heat exchange fluid stored in the heat battery (200) circulates between the heat batteries (200) and exchanges heat with the ground; Includes rules,
The heat battery 200,
A first area (200A) where the heat exchange fluid is stored; and
a second area (200B) storing the heat exchange fluid that is selectively mixed with the heat exchange fluid stored in the first area (200A); Including,
The first load 110 is the heat exchange fluid stored in the first area 200A or the heat exchange fluid stored in the second area 200B, depending on the temperature of the heat exchange fluid stored in the first area 200A. exchanges heat with the heat exchange fluid stored in the first area (200A) mixed with,
The second load 120 is connected to the heat exchange fluid stored in the second region 200B regardless of whether the first load 110 is operating and the temperature of the heat exchange fluid stored in the first region 200A. A regenerative heat pump system that includes an underground heat exchanger that only exchanges heat.
According to claim 1,
The heat exchange fluid stored in the first area (200A) is,
When the first load 110 operates, heat is exchanged with the first load 110 while circulating between the first load 110 and the first area 200A, or
Before the first load 110 operates, heat is exchanged with the ground while circulating between the first area 200A and the underground heat exchanger 300, and when the first load 110 operates, the first load 110 Heat is exchanged with the first load 110 while circulating between (110) and the first area (200A),
When the first load 110 operates, it circulates between the first load 110, the second area 200B, and the first area 200A to be mixed with the heat exchange fluid stored in the second area 200B. A regenerative heat pump system including an underground heat exchanger that exchanges heat with the first load (110) while doing so.
According to claim 1,
The heat exchange fluid stored in the first area (200A) is,
When the temperature is above the preset first load lower limit temperature (Td1), when the first load 110 operates, the first load 110 circulates between the first load 110 and the first area 200A. Heat exchanged with (110),
If the temperature is less than the first load lower limit temperature (Td1), the temperature increases while passing through the underground heat exchanger 300 before the first load 110 operates, and the first load lower limit temperature (Td1) ) A regenerative heat pump system that includes a ground heat exchanger, which exchanges heat with the ground until a temperature above that is reached.
According to claim 3,
The heat exchange fluid stored in the first area 200A circulates between the first load 110 and the first area 200A, exchanges heat with the first load 110, and increases its temperature, thereby increasing the temperature of the first load 110 and the first area 200A. When the temperature exceeds the load lower limit temperature (Td1) and the preset first load upper limit temperature (Tu1) is reached, the first load (110) is mixed with the heat exchange fluid stored in the second region (200B), A regenerative heat pump system including an underground heat exchanger that circulates between the second area (200B) and the first area (200A) and exchanges heat with the first load (110).
delete According to claim 1,
The heat exchange fluid stored in the second area 200B is,
When the first load 110 operates, it is mixed with the heat exchange fluid stored in the first load 110 according to the temperature of the heat exchange fluid stored in the first area 200A, thereby forming the first load 110, Heat is exchanged with the first load 110 while circulating between the second area 200B and the first area 200A,
When the second load 120 operates, heat is exchanged with the second load 120 while circulating between the second load 120 and the second area 200B, or
When the first and second loads 110 and 120 operate, a portion of them is mixed with the heat exchange fluid circulating between the first load 110 and the first area 200A and is mixed with the first load 110 and the first area 200A. ), heat is exchanged with the first load 110 while circulating between the second area (200B) and the first area (200A), and the remainder is circulated between the second load (120) and the second area (200B) A heat storage type heat pump system including an underground heat exchanger that exchanges heat with the second load (120) while doing so.
According to claim 1,
The heat exchange fluid stored in the second area 200B is,
When the first load 110 operates only when the temperature of the heat exchange fluid stored in the first area 200A increases and reaches a temperature equal to or higher than the preset first load upper limit temperature Tu1, the first area 200A It is mixed with the heat exchange fluid stored in (200A) and circulates between the first load (110), the second area (200B) and the first area (200A) to exchange heat with the first load (110),
When the temperature is less than the preset second load upper limit temperature Tu2, when the second load 120 operates, the second load 120 circulates between the second load 120 and the second area 200B. Heat exchanges with (120),
Only when the temperature of the heat exchange fluid stored in the first area 200A increases and reaches a temperature equal to or higher than the preset first load upper limit temperature Tu1 and the temperature is less than the preset second load upper limit temperature Tu2, When the first and second loads 110 and 120 operate, a portion of them is mixed with the heat exchange fluid stored in the first area 200A to form the first load 110, the second area 200B and Heat is exchanged with the first load 110 while circulating between the first area 200A, and the remaining heat is exchanged with the second load 120 while circulating between the second load 120 and the second area 200B. A regenerative heat pump system comprising an underground heat exchanger.
The method according to any one of claims 1 to 4, 6 and 7,
The heat battery 200,
a battery housing 210 defined inside such that the first and second areas 200A and 200B are separated from each other;
An axial heat dissipation member 220 disposed in the first area (200A) and in which the axial heat dissipation fluid sealed therein exchanges heat with the heat exchange fluid stored in the first area (200A);
A first inlet pipe 231 for the first load through which the heat exchange fluid is introduced from the first load 110 to the first area 200A;
A second inlet pipe 232 for the first load through which the heat exchange fluid is introduced from the first load 110 to the second area 200B;
A first load discharge pipe 240 through which the heat exchange fluid is discharged from the first area 200A to the first load 110;
An underground heat exchanger outlet pipe 250 through which the heat exchange fluid is delivered from the first area 200A to the underground heat exchanger 300;
a second load discharge pipe 270 through which the heat exchange fluid is discharged from the second area 200B to the second load 120;
a supply pipe 280 through which the heat exchange fluid stored in the second area 200B is supplied to the first area 200A; and
An opening/closing valve 290 that selectively opens and closes the supply pipe 280; A regenerative heat pump system including an underground heat exchanger.
According to claim 8,
The outlet pipe (250) for the underground heat exchanger is branched from one side of the outlet tube (240) for the first load.
According to claim 8,
The second load discharge pipe 270 is disposed through the first area 200A,
The supply pipe (280) is branched from one side of the second load discharge pipe (270) and extends to the first area (200A). A regenerative heat pump system including an underground heat exchanger.
According to claim 10,
The opening/closing valve 290 opens the supply pipe 280 only when the inside of the first area 200A is at negative pressure and the inside of the second area 200B is at positive pressure, and the heat storage type heat exchanger includes an underground heat exchanger. pump system.
First and second loads 110 and 120 operating independently of each other;
The first area 200A, where the heat exchange fluid for heat exchange with the first load 110 is stored, and the heat exchange fluid for heat exchange with the second load 120, or mixed with the heat exchange fluid stored in the first area 200A, A heat battery 200 including a second area 200B in which the heat exchange fluid that is heat exchanged with the load 110 is stored;
At least one underground heat exchanger (300) in which the heat exchange fluid stored in the heat battery (200) circulates between the heat batteries (200) and exchanges heat with the ground;
A device that pumps the heat exchange fluid so that it circulates between the first load 110 and the first area 200A or circulates between the first load 110, the second area 200B, and the first area 200A. 1 pump (P1);
A second pump (P2) that pumps the first load 110, the first area 200A, and the underground heat exchanger 300 to circulate;
A third pump (P3) that pumps the heat exchange fluid so that it circulates between the second load (120) and the second area (200B); and
The heat exchange fluid circulates between the first load 110 and the first area 200A, or the heat exchange fluid circulating between the first load 110 and the first area 200A is used in the underground heat exchanger 300. ) A control valve (V) that controls to selectively pass through or circulate between the first load (110), the second area (200B) and the first area (200A); Including,
When the first load 110 operates, one of the first and second pumps (P1) and (P2) operates according to the temperature of the heat exchange fluid stored in the first area (200A) and the control valve ( The heat exchange fluid circulates between the first load 110 and the first area 200A or the heat exchange fluid circulates between the first load 110 and the first area 200A according to control by V). Via the underground heat exchanger 300,
When the second load 120 operates, the first and second pumps P1 and P2 are operated according to whether the first load 110 is operating and the temperature of the heat exchange fluid stored in the first area 200A. ) The third pump (P3) operates regardless of the operation of the heat exchange fluid to circulate between the second load (120) and the second area (200B). A regenerative heat pump system including an underground heat exchanger.
According to claim 12,
The first and second pumps (P1) (P2) operate alternatively,
The third pump (P3) operates independently of the first and second pumps (P1) and (P2). A regenerative heat pump system including an underground heat exchanger.
delete According to claim 12,
When the temperature of the heat exchange fluid stored in the first area 200A is higher than the preset first load lower limit temperature Td1, when the first load 110 operates, the first pump P1 operates. , the control valve (V) controls the heat exchange fluid pumped by the first pump (P1) to circulate between the first load (110) and the first area (200A),
When the temperature of the heat exchange fluid stored in the first area 200A is less than the first load lower limit temperature Td1, the second pump P2 operates before the first load 110 operates, The control valve (V) increases the temperature of the heat exchange fluid stored in the first area (200A) by the second pump (P2) until it reaches a temperature equal to or higher than the first load lower limit temperature (Td1). A regenerative heat pump system including an underground heat exchanger that controls the pumped heat exchange fluid to pass through the underground heat exchanger (300).
According to claim 12,
The heat exchange fluid stored in the first area (200A) circulates between the first load (110) and the first area (200A) and exchanges heat with the first load (110), thereby increasing the temperature of the first load (110). When a temperature exceeding the first load upper limit temperature (Tu1), which is preset as a temperature exceeding the lower limit temperature (Td1), is reached, the first pump (P1) continues to operate, and the control valve (V) operates The heat exchange fluid pumped by the pump P1 circulates between the first load 110, the second area 200B, and the first area 200A to exchange the heat exchange fluid stored in the second area 200B. A regenerative heat pump system including an underground heat exchanger with controlled mixing.
The method according to any one of claims 12, 13, 15 and 16,
The heat battery 200,
a battery housing 210 defined inside such that the first and second areas 200A and 200B are separated from each other;
An axial heat dissipation member 220 disposed in the first area 200A and in which the axial heat dissipation fluid sealed therein exchanges heat with the heat exchange fluid stored in the first area 200A;
A first inlet pipe 231 for the first load through which the heat exchange fluid is introduced from the first load 110 to the first area 200A;
A second inlet pipe 232 for the first load through which the heat exchange fluid is introduced from the first load 110 to the second area 200B;
A first load discharge pipe 240 through which the heat exchange fluid is discharged from the first area 200A to the first load 110;
An underground heat exchanger outlet pipe 250 through which the heat exchange fluid is delivered from the first area 200A to the underground heat exchanger 300;
a second load inlet pipe 260 through which the heat exchange fluid is introduced from the second load 120 to the second area 200B;
a second load discharge pipe 270 through which the heat exchange fluid is discharged from the second area 200B to the second load 120;
a supply pipe 280 through which the heat exchange fluid stored in the second area 200B is supplied to the first area 200A; and
An opening/closing valve 290 that selectively opens and closes the supply pipe 280; A regenerative heat pump system including an underground heat exchanger.
According to claim 17,
Both ends of the second inlet pipe 232 for the first load include an underground heat exchanger, respectively connected to one side of the first inlet pipe 231 for the first load and the inlet pipe 260 for the second load. A regenerative heat pump system.
According to claim 17,
The outlet pipe (250) for the underground heat exchanger is branched from one side of the outlet tube (240) for the first load.
According to claim 17,
The second load discharge pipe 270 is disposed through the first area 200A,
The supply pipe (280) is branched from one side of the second load discharge pipe (270) and extends to the first area (200A). A regenerative heat pump system including an underground heat exchanger.
According to claim 20,
The opening/closing valve 290 opens the supply pipe 280 only when the inside of the first area 200A is at negative pressure and the inside of the second area 200B is at positive pressure, and the heat storage type heat exchanger includes an underground heat exchanger. pump system.
According to any one of claims 1 to 4 and claims 6, 7, 12, 13, 15, and 16,
A heat storage type heat pump system including an underground heat exchanger, in which a storage heat dissipation member 220 in which a storage heat dissipation fluid sealed therein exchanges heat with the heat exchange fluid is disposed in the first area 200A.

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