KR102114174B1 - Heat pump based automatic control geothermal system and the control method thereof - Google Patents

Abstract

The present invention relates to a heat pump-based automatic control geothermal system and a control method thereof, a heat pump unit 100 for circulating a refrigerant that exchanges heat with geothermal circulating water and load circulating water along the refrigerant side piping 101, Geothermal pump unit 200 and load-side heat exchanger 302 to allow the geothermal circulation water exchanged in the geothermal side heat exchanger 202 and 102 to circulate through the underground heat exchanger HE along the geothermal side pipe 201 ( In the geothermal system including a load circulation pump unit 300 to allow the load circulation water heat-exchanged in 103 to circulate along the load-side pipe 301, the heat pump unit 100 stores various data necessary for automatic control. Using the storage unit 121, the refrigerant, the geothermal circulation water and the temperature and flow rate of the load circulation water to calculate the expected load and the residual capacity of the underground heat exchanger (HE) subheat pump (130), the A main heat pump 120 including a geothermal pump unit 200 or a module unit 122 performing an operation for controlling the operation of the load circulation pump unit 300; And at least one sub-heat pump 130 operated by the control of the main heat pump 120. Automatic heat control by the main heat pump 120, characterized in that it can be automatically controlled by the main heat pump 120 It's about the system. Accordingly, the burden of installation, maintenance, repair, and repair due to wiring work can be eliminated, and energy efficiency of the geothermal system can be increased.

Description

Heat pump based automatic control geothermal system and the control method thereof

The present invention relates to a geothermal system using geothermal heat as a heat source and a control method thereof. Specifically, the main heat pump of the heat pump unit controls the operation of the sub-heat pump as well as the geothermal pump and load circulation pump, and is connected to a separate automatic control panel or the like. The present invention relates to a geothermal system capable of automatic control and a control method without wiring.

The geothermal system, which is a cooling and heating system that uses geothermal heat as a heat source, is composed of loads such as AHU and FCU in buildings requiring heating and cooling, heat pumps, geothermal pumps, load pumps, and underground heat exchange units embedded in the ground. The underground heat circulating water that receives the underground heat exchanges heat with the refrigerant in the heat pump, and the load circulating water transferred to the pipe connected to the load exchanges heat with the refrigerant to cool and heat the load.

Meanwhile, the conventional geothermal system is composed of one or more heat pumps, an automatic control panel, a power supply panel, and various sensors. The automatic control panel was wired to the power supply panel, various sensors and heat pumps. Specifically, the heat pump was connected to the power supply panel in a wired manner to receive power for driving, and was connected to the automatic control panel in a wired manner to operate under the control of the automatic control panel. As the heat pump was connected to the automatic control panel and the power supply panel by wire, respectively, there was a lot of inconvenience in the wiring work, and there were additional difficulties such as maintenance, maintenance, management, and organization according to the wiring.

In addition, the conventional geothermal system relies on simple start-up and stop by the sequential start of the heat pump without predicting the residual capacity of the underground heat exchanger and the load capacity on the load side. There was an additional limit to this lowering.

KR 10-1843088 B1

In order to solve the above-mentioned problems, the present invention provides a geothermal system and a control method for reducing the burden of a separate installation of an automatic control panel or a wiring operation to connect to the heat pump by controlling itself. have.

In addition, it aims to increase the energy efficiency of the geothermal system by predicting geothermal heat and load and controlling it to produce high performance while using less energy.

In order to achieve the above object, the present invention, the heat pump-based automatic control geothermal system and its control method is a heat pump unit for circulating the refrigerant to exchange heat with the geothermal circulation water and load circulation water along the refrigerant pipe (101) Geothermal heat exchanger heat exchanged in the geothermal heat exchanger 202, 102, and geothermal pump unit 200 to circulate through the geothermal heat exchanger HE along the geothermal heat pipe 201, and load side heat exchange In the geothermal system including a load circulation pump unit 300 to allow the load circulation water exchanged in the groups 302 and 103 to circulate along the load-side pipe 301, the heat pump unit 100 is required for automatic control. Subheat pump by calculating the expected load and the residual capacity of the underground heat exchanger (HE) using the storage unit (121) for storing various data and the temperature and flow rate of the refrigerant, the geothermal circulation water and the load circulation water 130, the main heat pump 120 including a module unit 122 for performing an operation for controlling the operation of the geothermal pump unit 200 or the load circulation pump unit 300; And at least one sub-heat pump 130 operated by the control of the main heat pump 120. Automatic heat control by the main heat pump 120, characterized in that it can be automatically controlled by the main heat pump 120 Is achieved by the system.

In addition, the main heat pump 120 is in communication with the sensor unit 400, the sensor unit 400 includes a flow meter 410 for measuring the flow rate and a thermometer 420 for measuring the temperature, the thermometer ( 420) is an external air sensor 421 for measuring the temperature of the outside air, a temperature sensor unit 420-1 installed on the geothermal side pipe 201 to measure the temperature of the geothermal circulation water before and after heat exchange with the refrigerant. (420-2), the temperature sensor unit (420-3) (420-4) installed in the refrigerant-side piping (101) to measure the temperature of the refrigerant before and after heat exchange with the geothermal circulation water, the refrigerant side It is installed in the pipe 101 and is installed in the temperature sensor unit 420-4, 420-5 and the load-side pipe 301 to measure the temperature of the refrigerant before and after heat exchange with the load circulating water and the refrigerant. Temperature sensor unit (420-6) (420-7) for measuring the temperature of the load circulating water before and after heat exchange; And, geothermal heat installed in the geothermal side piping 210 to measure the flow rate of the geothermal circulation water Circulating water flow sensor (410-1), a refrigerant flow sensor (410-5) installed in the refrigerant-side piping (110) to measure the flow rate of the refrigerant, and installed in the load-side piping (310) of the load circulating water It includes a load circulation water flow sensor for measuring the flow rate (410-7), the storage unit 121 may be stored in the flow rate or temperature value measured by the sensor unit 400.

In addition, the module unit 122 includes a load measurement module 122-1 and a geothermal measurement module 122-2, wherein the load measurement module 122-1 determines a predicted temperature range of the load circulation water. Calculation, and the geothermal measurement module 122-2 may calculate a predicted temperature range of the geothermal circulation water.

In addition, the load measurement module (122-1) includes a load prediction module (122-11) and a load temperature calculation module (122-12), the load prediction module (122-11) is a condition value or storage of the building The estimated load is calculated using the value stored in the unit 121, and the load temperature calculation module 122-12 uses the expected load calculated by the load prediction module 122-11 to cycle the load. The predicted temperature range of the number can be calculated.

In addition, the geothermal measurement module 122-2 includes a geothermal prediction module 122-21 and a geothermal temperature calculation module 122-22, wherein the geothermal prediction module 122-21 is the underground heat exchanger (HE ) Or the value stored in the storage unit 121 to calculate the predicted residual capacity of the underground heat exchanger (HE), and the geothermal temperature calculation module (122-22) is the geothermal measurement module The predicted temperature range of the geothermal cycle water may be calculated using the estimated residual capacity calculated by (122-2).

In addition, the module unit 122 includes an efficiency measurement module 122-3, wherein the efficiency measurement module 122-3 includes the load measurement module 122-1 and the geothermal measurement module 122-2. Efficiency according to each temperature range calculated by using the temperature range of the geothermal circulation water and the load circulation water calculated by can be calculated.

In addition, the module unit 122 includes a control module 122-4, wherein the control module 122-4 uses the efficiency calculated by the efficiency measurement module 122-3 to the ideal condition. The temperature or flow rate of the refrigerant in the heat pump unit 100 and the flow rate of the geothermal pump unit 200 and the load circulation pump unit 300 may be controlled.

In order to achieve the above object, the heat pump-based automatic control geothermal system, the heat pump unit 100 is composed of a main heat pump 120 and a sub-heat pump 130, the main heat pump 120 is It is composed of a storage unit 121, a module unit 122, a pump unit 123, and a communication unit 124. The module unit 122 includes a load measurement module 122-1 and a geothermal measurement module 122-2. , Consisting of an efficiency measurement module (122-3) and a control module (122-4), the sensor unit 400 communicating with the main heat pump 120 measures the temperature of the outside air, geothermal circulation water and load circulation water And (S100),

The module unit 122 predicts the expected load and the residual capacity of the underground heat exchanger (HE) using the temperature of the outside air, the geothermal circulation water, and the load circulation water sensed through the sensor unit (S200), The module unit 122 calculates the predicted temperature range of the geothermal circulation water and the load circulation water using the predicted expected load and the residual capacity of the underground heat exchanger (S300) (S300), and the module unit ( 122) calculates the efficiency according to the load set temperature using the calculated temperature range (S400), and the module unit 122 is a geothermal pump unit 200, a load circulation pump unit 300 according to the calculated efficiency ) And the heat pump 100 can be achieved by a method of controlling the operation (S500).

According to the present invention, the main heat pump of the heat pump unit can control itself, thereby easing the burden of installation, maintenance, repair, and repair due to the separate installation of the automatic control panel or the wiring operation to connect to it.

In addition, the energy efficiency of the geothermal system may increase as the main heat pump automatically controls the estimated load and the residual capacity of the underground heat exchanger.

In addition, as the remaining capacity of the expected load and the underground heat exchanger is calculated using the temperature of the outside air, the temperature of the load circulation water and the temperature and flow rate of the geothermal circulation water, the state information of the load and the underground heat exchanger can be utilized in real time. Therefore, there is an advantage that more accurate prediction is possible.

In addition, by using the load measurement module and the geothermal measurement module, the predicted load of the load circulating water and the geothermal circulation water and the residual capacity of the underground heat exchanger are predicted to calculate the predicted temperature range for operation, thereby achieving realistic performance efficiency. Driving conditions can be efficiently derived.

Furthermore, as the temperature of the load circulation water and the geothermal circulation water are considered as well as the conditions of the building, the error range of the expected load can be reduced.

In addition, it is possible to reduce the error range of the estimated residual capacity of the underground heat exchanger by further considering the conditions of the underground heat exchanger as well as the temperature of the load circulation water and the geothermal circulation water.

In addition, the efficiency measurement module can propose selection conditions for ideal driving by calculating the efficiency according to the temperature set by the user.

Depending on the embodiment, the user may increase the energy efficiency by operating the geothermal system in consideration of the expected power consumption according to the efficiency.

In addition, as the control module controls the sub-heat pump, the geothermal pump unit, or the load circulation pump unit under ideal conditions selected by the user using the calculated efficiency, energy efficiency can be automatically increased.

1 schematically shows a heat pump-based geothermal system according to an embodiment of the present invention.
2 shows a heat pump unit and other configurations according to an embodiment of the present invention.
3 is a block diagram of a main heat pump according to an embodiment of the present invention.
4 is a configuration diagram of a module unit according to an embodiment of the present invention.
5 is an operation flowchart of a module unit according to an embodiment of the present invention.
6 shows a table of test results of heating and cooling performance according to an embodiment of the present invention.
7A is a graph of an experiment result of cooling performance according to an embodiment of the present invention.
Figure 7b is a graph of the heating performance test results according to an embodiment of the present invention.

The embodiments described below are provided so that those skilled in the art can easily understand the technical idea of the present invention, and the present invention is not limited thereto. In addition, matters expressed in the accompanying drawings may be different from those actually implemented in schematic drawings to easily describe embodiments of the present invention.

When an element is referred to as being connected to or connected to another element, it should be understood that other elements may exist in the middle, although they may be directly connected or connected to the other element.

And the term “connection” includes direct and indirect connection between one member and another member, and may refer to all physical connections such as adhesion, attachment, fastening, bonding, and bonding.

In addition, expressions such as'first, second', etc. are expressions used only for distinguishing a plurality of components, and do not limit the order or other features between components.

Singular expressions include plural expressions unless the context clearly indicates otherwise. The terms “comprises” or “haves” are intended to mean the presence of features, numbers, steps, actions, components, parts or combinations thereof described in the specification, one or more other features or numbers, It can be interpreted that steps, operations, components, parts or combinations thereof can be added.

1 is a view schematically showing a heat pump-based geothermal system according to an embodiment of the present invention, and FIG. 2 is a view showing a heat pump unit and other configurations according to an embodiment of the present invention, and FIG. 3 Is a configuration diagram of a main heat pump according to an embodiment of the present invention, FIG. 4 is a configuration diagram of a module unit according to an embodiment of the present invention, and FIG. 5 is an operation flowchart of a module unit according to an embodiment of the present invention , FIG. 6 is a table of test results of cooling and heating performance according to an embodiment of the present invention, FIG. 7A is a graph of test results of cooling performance according to an embodiment of the present invention, and FIG. 7B is heating performance according to an embodiment of the present invention It is a graph of the experimental results.

Hereinafter, an automatic control geothermal system based on a heat pump will be described with reference to FIGS. 1 to 4.

The heat pump-based automatic control geothermal system is composed of a refrigerant circulation unit (A), a geothermal circulation unit (B), and a load unit (C).

The geothermal circulation unit (B) is composed of a geothermal pump unit 200, a geothermal side pipe 201, an underground heat exchanger (HE), and a geothermal side heat exchanger 202. The geothermal pump unit 200, the underground heat exchanger HE, and the geothermal heat exchanger 202 are connected to the geothermal side pipe 201, and the geothermal circulation water is provided inside the geothermal side pipe 201. The geothermal circulation water circulates along the geothermal side pipe 201 by the geothermal pump unit 200, and exchanges heat with the refrigerant in the geothermal heat exchanger (HE) and the refrigerant in the geothermal heat exchanger (202) (102). When heating in the load (C), the geothermal circulation water absorbs heat from the underground heat exchanger (HE) and releases heat from the geothermal side heat exchanger (202) (102). On the contrary, when cooling is performed in the load part C, the geothermal circulation water discharges heat from the underground heat exchanger HE and absorbs heat from the geothermal side heat exchanger 202, 102.

The refrigerant circulation part (A) is composed of a heat pump part (100), a refrigerant side pipe (101), a geothermal side heat exchanger (102), and a load side heat exchanger (103). The heat pump unit 100, the geothermal side heat exchanger 102, and the load side heat exchanger 103 are connected to the refrigerant side piping 101, and a refrigerant is provided inside the refrigerant side piping 101. The refrigerant is circulated along the refrigerant-side piping 101 by the heat pump unit 100, and is exchanged with the geothermal circulation water in the geothermal heat exchangers 102 and 202, and is loaded in the load-side heat exchangers 103 and 302. Heat exchange with circulating water.

The load part C is composed of a load circulation pump part 300, a load side pipe 301, a load side heat exchanger 302, and a load L. The load circulation pump unit 300, the load-side heat exchanger 302, and the load L are connected to a load-side pipe 301, and load-circulating water is provided inside the load-side pipe 301. The load circulating water is circulated along the load side pipe 301 by the load circulation pump unit 300, and heat exchanges with the refrigerant in the load side heat exchangers 302 and 103, and heat exchanges in the load L. The sensor unit 400 shown in FIG. 1 will be described together in FIG. 2.

2 is a configuration diagram of a heat pump unit 100, a geothermal pump unit 200, a load circulation pump unit 300, and a sensor unit 400 according to an embodiment of the present invention.

The heat pump unit 100 is composed of a main heat pump 120 and a sub-heat pump 130. The main heat pump 120 may communicate with the sub-heat pump 130, the geothermal pump unit 200, the load circulation pump 300, and the sensor unit 400. The sub-heat pump 130 is operated under the control of the main heat pump 120. Accordingly, the burden of installation, maintenance, repair, and repair of wiring is alleviated, and there is an advantage in that a test operation can be immediately performed after installation of the heat pump and completion of piping work.

The sensor unit 400 in communication with the main heat pump 120 is composed of a flow meter 410, a thermometer 420, and a pressure gauge 430.

The flow meter 410 is installed in the refrigerant side piping 101, the geothermal side piping 201, and the load side piping 301 to measure the flow rate of the refrigerant, geothermal circulation water, and load circulation water. The measured flow rate can be used to calculate the residual capacity and expected load of the underground heat exchanger (HE) along with the temperature measured by the thermometer (420).

Thermometer 420 is installed on the inside and outside of the load (L), the refrigerant side piping 101, the geothermal side piping 201 and the load side piping 301 is installed load (L), refrigerant, geothermal circulation water and load circulation water Measure the temperature. The measured temperature can be used to calculate the residual capacity and expected load of the underground heat exchanger (HE).

The pressure gauge 430 is installed in the refrigerant side piping 101, the geothermal side piping 201, and the load side piping 301 to measure the pressure of the refrigerant, geothermal circulation water, and load circulation water. The measured pressure can be used to determine whether the pipe is abnormal.

In one embodiment, when the pressure gauge 430 detects an abnormality in the piping, the abnormality information is transmitted to the main heat pump 120 so that the user can check in real time based on the input/output unit 125 to be described later. Can be implemented.

The input/output unit 125 may receive a user input through wired or wireless communication, and display the driving status of the main heat pump 120. The input/output unit 125 may receive a user's input wirelessly through the communication unit 124 and display the driving status of the main heat pump 120. For example, the user communicates with the communication unit 124 using a smartphone (not shown) or the like to check the operation status of the main heat pump 120, or set temperature of the load circulation water or heat pump unit 100. You can set operating conditions such as operating time.

In addition, when abnormal information is transmitted from the pressure gauge 430, the module unit 122 of the main heat pump 120 is a sub-heat pump 130, a geothermal pump unit 200 or a load circulation pump corresponding to the piping. The operation of the unit 300 can be automatically stopped immediately.

Flowmeters 410-1 to 410-7, thermometers 420-1 to 420-7 and 421, and pressure gauges 430-1 to 430-7 are installed in the piping before and after heat exchange, as shown in FIG. , It can measure the flow temperature and pressure of the geothermal circulation water and load circulation water.

3 is a block diagram of a main heat pump according to an embodiment of the present invention. The main heat pump 120 is composed of a storage unit 121, a module unit 122, a pump unit 123, a communication unit 124, and an input/output unit 125. The storage unit 121 includes the building conditions such as values sensed through the sensor unit 400, power consumption of the geothermal system, temperature, pressure and flow rate of the geothermal circulating water, refrigerant and load circulating water, insulation properties of the building, and arrangement. Various types of information about the conditions of the underground heat exchanger (HE), such as the type of pipe installed in the ground, the thermal conductivity, and the number, are stored.

The module unit 122 predicts loads and geothermal heat using various information stored in the storage unit 121, calculates appropriate operating conditions of the geothermal system, and controls the conditions to operate the geothermal system. The module unit 122 controls the geothermal system by transmitting and receiving data to and from the storage unit 121, the pump unit 123, and the communication unit 124. The module unit 122 will be described in detail in FIG. 4.

The pump unit 123 circulates the refrigerant to exchange heat.

The communication unit 124 allows components connected to the main heat pump 120 to communicate with the main heat pump 120. The sub-heat pump 130, the geothermal pump unit 200, the load circulation pump unit 300, and the sensor unit 400 communicating with the main heat pump 120 described above may communicate through wireless as well as wired. Wireless communication may use standards such as radio communication or Wi-fi. As the main heat pump 120 communicates wirelessly with other components, the amount of wiring work is drastically reduced in the machine room where the main heat pump 120 is installed. Accordingly, the workload and cost for installation, maintenance, repair and repair of the wiring is greatly reduced. In addition, as the sensor unit 400 and the main heat pump 120 are directly connected wirelessly, the entire geothermal system can be monitored and controlled through the input/output unit 125 of the main heat pump 120. In addition, as the main heat pump 120 is capable of wireless communication, it is possible to grasp the monitored situation outside the machine room through wireless communication such as the Internet. For example, in a situation where the main heat pump 120 and a smart phone (not shown) are connected using the Internet, the user can monitor the geothermal system outside the machine room through the smart phone. Additionally, the situation monitored by the main heat pump 120 (ex: whether to drive, whether to breakdown, energy consumption) may be periodically messaging to the smartphone. Accordingly, the user can easily grasp the operation status of the geothermal system without visiting the machine room.

4 is a detailed configuration diagram of a module unit according to an embodiment of the present invention. The module unit 122 is composed of a load measurement module 122-1, a geothermal measurement module 122-2, an efficiency measurement module 122-3, and a control module 122-4.

The load measurement module 122-1 finally calculates the temperature range of the expected load circulation water, and the load measurement module 122-1 includes the load prediction module 122-11 and the load temperature calculation module 122-12. It consists of. The load prediction module 122-11 predicts the amount of heat required to maintain the temperature set by the user, and the load temperature calculation module 122-12 predicts the temperature range of the load circulation water required according to the required amount of heat.

The geothermal measurement module 122-2 finally calculates the temperature range of the expected geothermal circulation water. The geothermal measurement module 122-2 includes the geothermal prediction module 122-21 and the geothermal temperature calculation module 122-22. It consists of. The geothermal prediction module 122-21 predicts the amount of heat exchangeable through the temperature of the geothermal heat, and the geothermal temperature calculation module 122-22 predicts the temperature range of the geothermal circulating water reachable through heat exchange with the geothermal heat.

In another embodiment, the load measurement module 122-1 and the geothermal measurement module 122-2 are data stored in the storage unit 121, such as previous year data, building conditions, or underground heat exchanger (HE) conditions. It is also possible to predict the temperature of the load circulation water and the geothermal circulation water.

The module unit 122 may perform a simulation using the conditions of the building and the conditions of the underground heat exchanger (HE) to reduce the error range of the expected load and the expected residual capacity of the underground heat exchanger.

The efficiency measurement module 122-3 uses the temperature range predicted from the load measurement module 122-1 and the geothermal measurement module 122-2 and the estimated power consumption of the heat pump unit 120 to achieve efficiency according to each situation. Predict. The temperature of the load circulating water and the geothermal circulating water, the power consumption of the heat pump unit, and the efficiency thereof will be described in FIGS. 6A, 6B, and 7.

The efficiency measurement module 123-3 is the user's ideal for'adjusting the set temperature' or'applying efficiency' based on the temperature range predicted from the load measurement module 122-1 and the geothermal measurement module 122-2. Can be proposed as a selection condition. The control module 122-4 controls the pump unit 123, the sub-heat pump 130, the geothermal pump unit 200, and the load circulation pump unit 300 to control the above configurations to operate under specific conditions. The control module 122-4 may use the data received from the efficiency measurement module 122-3 to control the above configurations to operate under specific conditions, such as the highest efficiency or lowest power consumption, or a temperature set by the user. . The control module 122-4 operates the load measurement module 122-1, the geothermal measurement module 122-2, and the efficiency measurement module 122-3 in real time, so that the current geothermal system is operated in an optimized state. Can be controlled. Accordingly, the heat pump-based automatic control geothermal system can be operated while maintaining high energy efficiency.

For example, when the user selects the'set temperature adjustment' suggested by the efficiency measurement module 123-3, the control module 122-4 controls the pump unit 123 and the sub-heat pump 130 according to the adjusted set temperature. ), the geothermal pump unit 200 and the load circulation pump unit 300 can be controlled to operate, and when the user selects the'efficiency priority applied' proposed by the efficiency measurement module 123-3, the control module (122-4) can be controlled to operate under ideal conditions based on the initially selected set temperature.

5 is an operation flowchart of a module unit according to an embodiment of the present invention. The module unit 122 measures the temperature of the outside air, the geothermal circulation water, and the load circulation water through the sensor unit 400 (operation S100). The load prediction module 122-11 and the geothermal prediction module 122-21 predict the expected load amount and the residual capacity of the underground heat exchanger HE using the measured temperature and the set temperature of the load (operation S200). The load temperature calculation module 122-12 and the geothermal temperature calculation module 122-22 load cycle using the load amount and residual capacity predicted by the load prediction module 122-11 and the geothermal prediction module 122-21. The temperature range of the water and the geothermal circulation water is predicted (operation S300). The efficiency measurement module 122-3 uses the temperature range of the load circulation water and the geothermal circulation water predicted by the load temperature calculation module 122-12 and the geothermal temperature calculation module 122-22 to set each The efficiency according to the temperature is predicted (operation S400). The control module 122-4 controls the geothermal pump unit 200, the load circulation pump unit 300, and the heat pump unit 100 to operate according to the set temperature (operation S500). During operation, the module unit 122 checks whether the geothermal circulation water and the load circulation water are operating within a predicted temperature range (operation S600). If the geothermal circulating water and the load circulating water are not operating within the predicted temperature range ('No' in operation S600), the module unit 122 measures the temperature of the outside air, the geothermal circulating water and the load circulating water again (operation S100) ). Thereafter, the module unit 122 repeats the operation according to the flow described above. When the geothermal circulation water and the load circulation water are operating within a predicted temperature range ('Yes' in operation S600), the module unit 122 continues to operate.

6 is a result table of the operation test of the geothermal system according to an embodiment of the present invention. 6 shows heating and cooling heat consumed according to the temperature of the load circulation water and the geothermal circulation water during the heating and cooling operation of the geothermal system, power consumption and performance coefficient (COP). Such data can be stored in the storage unit 121 and used to calculate the condition that the module unit 122 has optimum efficiency.

7A is a graph showing a result of an experiment of cooling operation of a geothermal system according to an embodiment of the present invention.

Referring to the graph on the upper left, the flow rate of the load circulation water is 0.57 l/s, the temperature before heat exchange is 10 degrees, and the temperature after heat exchange rises from 6.5 degrees to 7 degrees as the temperature of the load circulation water rises. As the temperature of the load circulating water increases, the cooling capacity decreases, and the heat discharge amount of the load circulating water decreases.

Referring to the graph on the upper right, as the temperature of the load circulation water rises, power consumption consumed by the heat pump unit 100 increases, and the cooling performance coefficient (COP) decreases.

The graph at the bottom shows the relationship between power consumption and cooling performance coefficient (COP) according to the flow rate.

7B is a graph showing the results of a heating operation test of a geothermal system according to an embodiment of the present invention.

Referring to the graph on the upper left, the flow rate of the load circulating water is 0.57 l/s, the temperature before heat exchange is 45 degrees, and the temperature after heat exchange increases from 48 degrees to 49.5 degrees as the temperature of the load circulation water increases. As the temperature of the load circulating water increases, the heating capacity increases, and the heat absorption of the load circulating water also increases.

Referring to the graph on the upper right, as the temperature of the load circulation water increases, power consumption consumed by the heat pump unit 100 rises slightly, and the heating performance coefficient (COP) also increases.

The graph at the bottom shows the relationship between power consumption and heating performance coefficient (COP) according to the flow rate.

100: heat pump unit
120: main heat pump 130: sub-heat pump
121: storage
122: module unit
123: pump unit
124: Communication Department
200: geothermal pump unit 300: load circulation pump unit

Claims (8)

Geothermal circulation water heat exchanged in the heat pump unit 100 and the geothermal heat exchanger 202, 102 to circulate the refrigerant exchanging heat with the geothermal circulation water and the load circulation water along the refrigerant side piping 101. Geothermal pump unit 200 to be circulated through the underground heat exchanger (HE) along the (201), and the load to be circulated in the load circulation heat exchanged in the load-side heat exchanger 302, 103 along the load-side pipe 301 In the geothermal system including a circulation pump unit 300,
The heat pump unit 100 is a storage unit 121 for storing various data necessary for automatic control, and the expected load and the underground heat exchanger using temperature and flow rates of the refrigerant, the geothermal circulation water and the load circulation water It includes a module unit 122 for calculating the residual capacity of (HE) to perform the operation for controlling the operation of the sub-heat pump 130, the geothermal pump unit 200 or the load circulation pump unit 300, , The module unit 122 includes a load measurement module 122-1 and a geothermal measurement module 122-2, wherein the load measurement module 122-1 calculates a predicted temperature range of the load circulation water And, the geothermal measurement module 122-2 includes a main heat pump 120 for calculating a predicted temperature range of the geothermal circulation water; And
Including at least one sub-heat pump 130 operated by the control of the main heat pump 120, it is possible to automatically control by the main heat pump 120, including,
The main heat pump 120 is in communication with the sensor unit 400, the sensor unit 400 includes a flow meter 410 for measuring the flow rate and a thermometer 420 for measuring the temperature, the thermometer 420 Is an outside air sensor 421 for measuring the temperature of the outside air, a temperature sensor unit 420-1 and 420 installed in the geothermal side pipe 201 to measure the temperature of the geothermal circulation water before and after heat exchange with the refrigerant. -2), the temperature sensor unit 420-3 and 420-4 installed in the refrigerant-side piping 101 to measure the temperature of the refrigerant before and after heat exchange with the geothermal circulation water, and the refrigerant-side piping ( 101) is installed in the temperature sensor unit (420-4) (420-5) for measuring the temperature of the refrigerant before and after heat exchange with the load circulating water and the heat exchange with the refrigerant installed in the load-side piping (301) Temperature sensor unit (420-6) (420-7) for measuring the temperature of the load circulation water before and after; and,
Geothermal circulation water flow sensor (410-1) installed in the geothermal side piping (201) to measure the flow rate of the geothermal circulation water, refrigerant flow sensor installed in the refrigerant side piping (101) to measure the flow rate of the refrigerant (410-5) and a load circulation water flow sensor (410-7) installed in the load-side piping (301) to measure the flow rate of the load circulation water,
The storage unit 121 is a heat pump automatic control geothermal system, characterized in that the flow rate or temperature value measured by the sensor unit 400 is stored.
delete delete According to claim 1,
The load measurement module 122-1 includes a load prediction module 122-11 and a load temperature calculation module 122-12, wherein the load prediction module 122-11 is a building condition value or storage unit ( 121) calculates the expected load using the value stored in the load temperature, and the load temperature calculation module 122-12 uses the expected load calculated by the load prediction module 122-11 Automatic heat pump control geothermal system, characterized in that for calculating the predicted temperature range.
According to claim 1,
The geothermal measurement module 122-2 includes a geothermal prediction module 122-21 and a geothermal temperature calculation module 122-22, wherein the geothermal prediction module 122-21 includes a geothermal heat exchanger HE. Calculate the predicted residual capacity of the underground heat exchanger (HE) using conditions or by using values stored in the storage unit 121, and the geothermal temperature calculation modules 122-22 are the geothermal measurement modules 122 -2) heat pump automatic control geothermal system, characterized by calculating the predicted temperature range of the geothermal circulating water using the estimated residual capacity calculated by.
According to claim 1,
The module unit 122 includes an efficiency measurement module 122-3, wherein the efficiency measurement module 122-3 is provided by the load measurement module 122-1 and the geothermal measurement module 122-2. Heat pump automatic control geothermal system, characterized in that for calculating the efficiency according to each temperature range calculated using the temperature range of the calculated geothermal circulation water and the load circulation water.
The method of claim 6,
The module unit 122 includes a control module 122-4, wherein the control module 122-4 uses the efficiency calculated by the efficiency measurement module 122-3 to ideally heat the pump. Heat pump automatic control geothermal system, characterized in that the temperature or flow rate of the refrigerant of the unit 100 and the flow rate of the geothermal pump unit 200 and the load circulation pump unit 300 are controlled.
In the control method of a heat pump-based automatic control geothermal system,
Heat pump unit 100 is composed of a main heat pump 120 and a sub-heat pump 130, the main heat pump 120 is a storage unit 121, the module unit 122, the pump unit 123, It consists of a communication unit 124, the module unit 122 is a load measurement module (122-1), geothermal measurement module (122-2), efficiency measurement module (122-3) and control module (122-4) It is configured, the sensor unit 400 communicating with the main heat pump 120 measures the temperature of the outside air, geothermal circulation water and load circulation water (S100),
The module unit 122 predicts the expected load and the residual capacity of the underground heat exchanger (HE) using the temperature of the outside air, the geothermal circulation water, and the load circulation water sensed through the sensor unit (S200),
The module unit 122 calculates the predicted temperature range of the geothermal circulation water and the load circulation water using the predicted expected load and the residual capacity of the underground heat exchanger (HE) (S300),
The module unit 122 calculates the efficiency according to the load set temperature using the calculated temperature range (S400),
Method for controlling the module unit 122 to operate (S500) the geothermal pump unit 200, the load circulation pump unit 300 and the heat pump unit 100 according to the calculated efficiency.

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