KR102215977B1 - System and method for distributing heat source with high efficiency using geothermal heat source and solar power generation - Google Patents

Abstract

The present invention relates to a heat source distribution method, which distributes a heat source using a heat source distribution system including n heat pumps, m underground heat exchangers, and a circulation pump controlling a flow rate therebetween. The method comprises: a photovoltaic power generation step of producing electric energy from sunlight; an electrical energy monitoring step of monitoring the flow of the electric energy; a surplus power deriving step of deriving the remaining surplus power after consumption among the produced electric energy based on the monitoring result; an operating efficiency determining step of determining operating efficiency of the heat source distribution system based on the surplus power; and a driving step of driving the heat pump, the underground heat exchanger and the circulation pump based on the operating efficiency of the heat source distribution system. Therefore, energy efficiency can be increased.

Description

High-efficiency heat source distribution system and method using geothermal heat source and solar power generation {SYSTEM AND METHOD FOR DISTRIBUTING HEAT SOURCE WITH HIGH EFFICIENCY USING GEOTHERMAL HEAT SOURCE AND SOLAR POWER GENERATION}

The present invention relates to a heat source distribution system and method thereof, and more particularly, to a heat source distribution system and method for distributing a heat source with high efficiency using a geothermal heat source and solar power.

In general, due to the depletion of chemical fuels and environmental pollution, technology development of new and renewable energy has been actively made in recent years.

Renewable energy converts and uses energy generated by natural phenomena such as solar heat, wind, geothermal heat, and wave power. Among them, solar heat and geothermal heat are the ones that have the least change and can stably obtain energy.

Geothermal heat is used to draw heat from deep underground to the outside. As a representative device using geothermal heat, a geothermal boiler to use geothermal heat for cooling and heating is started, and as a representative device using solar heat, a heat medium is heated by solar heat. Solar boilers have been disclosed.

However, since geothermal boilers and solar boilers heat a heat medium and do not have high thermal efficiency, conventionally, a device that uses geothermal heat and solar energy in combination has been published in Korean Patent Laid-Open No. 10-2017-0105257 (published on September 19, 2017). A heating and cooling hot water boiler system through solar and solar connection control has been disclosed.

The above-described conventional heating/cooling hot water boiler system heats hot water by using both an electric heater rod and geothermal heat generated by electricity generated by solar energy, thereby improving energy efficiency rather than directly heating hot water by solar energy.

However, the conventional heating/cooling hot water boiler system converts solar energy to electric energy and converts electric energy back to thermal energy, so not only the thermal efficiency decreases, but also the electric heater rod cannot be heated when the amount of solar energy generated is small. There was a problem in that energy efficiency was deteriorated because the amount of power was generated.

In addition, in the related art, since geothermal heat is provided by a single heat pump for exchanging geothermal heat, the amount of electric power for operating the heat pump is continuously consumed, thereby reducing energy efficiency.

Korean Patent Laid-Open Publication No. 10-2017-0105257 (Published: 2017.09.19, Name: Air-conditioning and heating hot water boiler system through geothermal and solar power linkage control)

Accordingly, the present invention includes n heat pumps driven by photovoltaic power generation, and by determining the number of operation of the heat pump in proportion to the amount of surplus power consumed or stored in a power storage among the amount of power generated by photovoltaic power generation, An object of the present invention is to provide a high-efficiency heat source distribution system and method using a geothermal heat source and solar power to improve energy efficiency.

In addition, the present invention determines the heat pump to operate in consideration of the operating load according to the operating time of each of the n heat pumps, thereby improving energy efficiency and a high-efficiency heat source distribution system using a geothermal heat source and photovoltaic power generation. I want to provide a way.

In addition, the present invention includes m subterranean heat exchangers, measuring thermal efficiency by sequentially selecting the subterranean heat exchangers at preset cycles, and preferentially selecting and driving the subterranean heat exchanger with high thermal efficiency, thereby improving energy efficiency. It is intended to provide a high-efficiency heat source distribution system and method using a heat source and solar power.

In order to achieve the above object, the heat source distribution system provided by the present invention includes: a solar module for generating electric energy by receiving sunlight; A building energy management server (BEMS) that monitors the flow of electric energy produced by the solar module and generates a control command accordingly; It includes n heat pumps and m underground heat exchangers, and is provided by the underground heat exchanger by driving at least one heat pump and at least one underground heat exchanger according to a control command of the building energy management server (BEMS). A geothermal system for generating thermal energy by converting the temperature of heat; And a heat storage tank for receiving and accumulating remaining heat used as a heat source among the heat energy generated in the geothermal system.

Preferably, the building energy management server (BEMS) may determine the number of operation of the heat pump based on the amount of surplus power remaining after consumption of the electric energy produced by the solar module and transmit it to the geothermal system.

Preferably, the geothermal system comprises n heat pumps driven by electric energy produced by the solar module; M underground heat exchangers buried in the ground to exchange heat with the heat of the ground; Provides a communication interface with the building energy management server (BEMS), but controls the on/off of the heat pumps and the underground heat exchangers based on a control command transmitted from the building energy management server (BEMS), and the geothermal system A control device that converts the data generated in digital to the building energy management server (BEMS); And a circulation pump controlling a flow rate in the geothermal system, but controlling an operating efficiency in proportion to the number of operating units of the heat pump.

Preferably, the control device drives the corresponding heat pump after determining a driving target heat pump among the n heat pumps based on the number of operating heat pumps transmitted from the building energy management server (BEMS), The driving information of each of the heat pumps may be managed, and a driving target heat pump may be determined in consideration of an operating load according to an operating time of each of the heat pumps.

Preferably, the control device may measure thermal efficiency by sequentially selecting the m underground heat exchangers at preset periods, and preferentially select and drive an underground heat exchanger having high thermal efficiency.

Preferably, the geothermal system comprises: a hot water tank for storing hot water at a predetermined temperature; And a first path connected from the heat pump to the hot water tank. Or a three-way valve for determining a movement path of the heat energy recovered from the heat pump by opening any one of the second paths connected from the heat pump to the underground heat exchanger, and the control device recovers from the heat pump In order to reuse the generated heat energy, the three-way valve may be controlled to transfer the heat energy recovered from the heat pump to the hot water tank until the temperature of the hot water reaches the predetermined temperature.

On the other hand, in order to achieve the above object, in the heat source distribution method provided by the present invention, a heat source is generated using a heat source distribution system including n heat pumps, m underground heat exchangers, and a circulation pump that controls the flow rate therebetween. A method of distributing a heat source, comprising: a solar power generation step of generating electric energy from sunlight; An electrical energy monitoring step of monitoring the flow of the electrical energy; A surplus power amount deriving step of deriving an amount of surplus power consumed and remaining out of the produced electrical energy based on the monitoring result; An operation efficiency determination step of determining an operation efficiency of the heat source distribution system based on the amount of excess power; And a driving step of driving the heat pump, the underground heat exchanger, and the circulation pump based on the operating efficiency of the heat source distribution system.

Preferably, the operation efficiency determining step comprises: determining the number of operation of the heat pump based on the amount of power surplus; Determining an operation quantity of the underground heat exchanger based on the operation quantity of the heat pump; And determining the operating efficiency of the circulation pump for controlling the flow rate in the heat source distribution system based on the operating quantity of the heat pump, but determining the operating efficiency of the circulation pump in proportion to the operating quantity of the heat pump. It may include a decision step.

Preferably, the method further comprises a heat pump management step of managing driving information of each of the heat pumps, and the driving step selects a driving target heat pump in consideration of an operating load according to an operating time of each of the heat pumps. You can decide.

Preferably, the method further comprises a thermal efficiency management step of sequentially selecting the m subterranean heat exchangers at each preset period to measure thermal efficiency, and managing the subterranean heat exchangers based on the thermal efficiency, the driving step Among the underground heat exchangers, an underground heat exchanger having high thermal efficiency may be preferentially selected and driven.

The present invention includes n heat pumps driven by photovoltaic power generation, and determines the operating quantity of the heat pump in proportion to the amount of surplus power consumed or stored in a power storage among the power generated by photovoltaic power generation, the There is an effect of improving energy efficiency by determining a heat pump to operate in consideration of an operating load according to an operating time of each of the n heat pumps. In addition, the present invention includes m subterranean heat exchangers, measures thermal efficiency by sequentially selecting the subterranean heat exchangers at preset cycles, and preferentially selects and drives the subterranean heat exchanger with high thermal efficiency, thereby improving energy efficiency. There is this.

1 is a schematic configuration diagram of a high-efficiency heat source distribution system using a geothermal heat source and solar power according to an embodiment of the present invention.
2 is a schematic configuration diagram of a geothermal system included in a high-efficiency heat source distribution system using a geothermal heat source and solar power according to an embodiment of the present invention.
3 is a schematic configuration diagram of a heat pump included in a high-efficiency heat source distribution system using a geothermal heat source and solar power according to an embodiment of the present invention.
4 is a schematic flowchart of a method of distributing a high-efficiency heat source using a geothermal heat source and solar power according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, but will be described in detail so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various forms and is not limited to the embodiments described herein. Meanwhile, in the drawings, parts not related to the description are omitted in order to clearly describe the present invention, and similar reference numerals are attached to similar parts throughout the specification. In addition, even if the detailed description is omitted, descriptions of parts that can be easily understood by those skilled in the art have been omitted.

Throughout the specification and claims, when a certain part includes a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

1 is a schematic configuration diagram of a high-efficiency heat source distribution system using a geothermal heat source and solar power according to an embodiment of the present invention. Referring to FIG. 1, a high-efficiency heat source distribution system using a geothermal heat source and solar power generation according to an embodiment of the present invention includes a solar module 110, an energy storage system (ESS) 130, and a building. It includes an energy management server (Building Energy Management Server, BEMS) 140, a geothermal system 200, and a heat storage tank 150.

The solar module 110 may receive sunlight and generate electricity. That is, the photovoltaic module 110 is implemented as a module in which a plurality of photovoltaic devices are integrated in the form of a plate, so that electric energy may be produced by sunlight incident on the photovoltaic device.

The solar module 110 may generate a higher amount of power than the amount of power required to drive the heat pump unit ('210' in FIG. 2), which will be described later, and may include a plurality.

In addition, the solar module 110 has a built-in position tracking device, and the position may be changed in response to a position change of sunlight. That is, the solar device may be positioned in the direction in which sunlight is incident. In this case, since the location tracking device may be implemented by various known techniques, a detailed description thereof will be omitted.

The grid 120 refers to a power grid that operates by receiving electric energy from a power provider, and operates by receiving electric energy from, for example, a professional power provider (eg, Korea Electric Power) or various power generation devices. It means the power grid. That is, the grid 120 refers to a power network that operates by receiving electric energy from a solar power generation device as illustrated in FIG. 1 or constant power supplied from the professional power provider. In the example of FIG. 1, a solar module The power grid operating by receiving electric energy from (110) is schematically illustrated as one block.

The energy storage system (ESS) 130 converts and stores the electric energy generated by the solar module 110, but the energy storage system (ESS) 130 is generated by the solar module 110 Energy consumed and remaining in the grid 120 can be stored.

The Building Energy Management Server (BEMS) 140 monitors the flow of electric energy produced by the photovoltaic module 110 and generates a control command accordingly. In particular, the building energy management server (BEMS) 140 calculates the amount of surplus power consumed by the grid 120 among the electrical energy produced by the solar module 110 as a result of the monitoring, and based on the surplus power amount, the geothermal system A control command for controlling the operation of 200 may be generated. In this case, the amount of surplus power may be the amount of surplus power remaining after charging in the ESS 130 among the remaining power consumed by the grid 120.

On the other hand, the building energy management server (BEMS) 140 determines the operating efficiency of the heat source distribution system 100 based on the surplus power, and based on it, heat pumps in the geothermal system 200 to be described later (Fig. 2). '211, 213, 215, 217') can be determined. In addition, the control command transmitted to the geothermal system 200 may be a signal for determining the number of operating heat pumps ('211, 213, 215, 217' in FIG. 2).

For example, when the geothermal system 200 includes four heat pumps, the building energy management server (BEMS) 140 reduces the operating efficiency of the heat source distribution system 100 to 25% when the surplus power amount is less than 25 KW. The number of operating heat pumps is determined by one, and the operating efficiency of the heat source distribution system 100 is determined to be 50% when the surplus power is 25 KW or more and less than 50 KW, and the number of heat pumps is determined by two, and the surplus power is When 50KW or more and less than 75KW, the operating efficiency of the heat source distribution system 100 is determined as 75% to determine the number of heat pumps operated by three, and when the surplus power is 75KW or more and 100KW or less, the operation efficiency of the heat source distribution system 100 is 75%. It is determined as %, the number of operating heat pumps is determined as four, and a control command including the information can be transmitted to the geothermal system 200.

On the other hand, the building energy management server (BEMS) 140 may supply power to the heat pump through the solar module 110 or the ESS 130, but if necessary, the heat pump is supplied with constant power to the heat pump. You can also make it work.

The heat storage tank 150 accumulates heat energy generated by the geothermal system 200, but may be used as a heat source among the heat energy and receive and accumulate remaining heat.

The geothermal system 200 generates thermal energy by converting the temperature of heat obtained from the ground under the control of the building energy management server (BEMS) 140. To this end, the geothermal system 200 includes n heat pumps and m underground heat exchangers, and at least one heat pump and at least one underground heat exchanger according to the control command of the building energy management server (BEMS) 140 Heat exchangers can be driven. As a result, heat energy is generated by converting the temperature of heat obtained by the underground heat exchanger by the heat pump. A schematic configuration of such a geothermal system 200 is illustrated in FIG. 2.

2 is a schematic configuration diagram of a geothermal system included in a high-efficiency heat source distribution system using a geothermal heat source and solar power according to an embodiment of the present invention. Referring to FIGS. 1 and 2, one of the present invention The geothermal system 200 according to the embodiment includes a heat pump unit 210, an underground heat exchanger 220, a circulation valve 230, a circulation pump 240, a hot water tank 250, a three-way valve 260, and a control device. (270) may be included.

The heat pump unit 210 includes n heat pumps (heat pump 1 (211), heat pump 2 (213), heat pump 3 (215), …, heat pump n (217))), and on/ It includes valves 212, 214, 216, 218 to control off. At this time, the heat pumps (heat pump 1 (211), heat pump 2 (213), heat pump 3 (215), …, heat pump n (217)) are applied to the electric energy produced by the solar module 110. It is driven by, and transfers a low-temperature heat source to a high temperature by using the heat generation or condensation heat of a refrigerant, or transfers a high-temperature heat source to a low temperature, and may include a configuration of a cooling cycle in which cooling or heating is performed by a heat medium. A schematic configuration diagram of each of the heat pumps (heat pump 1 (211), heat pump 2 (213), heat pump 3 (215), ..., heat pump n (217))) is illustrated in FIG. 3. 3 is a schematic configuration diagram of a heat pump included in a high-efficiency heat source distribution system using a geothermal heat source and solar power according to an embodiment of the present invention, in particular, heat pumps (heat pump 1 211), The configuration of the cooling cycle included in each of the heat pump 2 213, the heat pump 3 215, ..., and the heat pump n 217 is illustrated.

1 to 3, each of the heat pumps (heat pump 1 (211), heat pump 2 (213), heat pump 3 (215), …, heat pump n (217)) evaporates refrigerant) (10), a compressor 20 for compressing the refrigerant evaporated from the evaporator 10, a condenser 30 for condensing the refrigerant compressed by the compressor 20, and an evaporator by expanding the heat medium condensed in the condenser 30 It may be configured to include an expansion valve 40 provided as (10).

Each of the heat pumps (heat pump 1 (211), heat pump 2 (213), heat pump 3 (215), …, heat pump n (217)) having such a configuration converts a low temperature heat source to a high temperature by a refrigerant. It may be converted and provided as a heat storage tank 150, or a high temperature heat source may be changed to a low temperature and provided as a heat storage tank 150.

In addition, each of the heat pumps (heat pump 1 (211), heat pump 2 (213), heat pump 3 (215), …, heat pump n (217)) further includes a four-way valve 50 and a four-way valve ( 50) may be configured to convert the flow of the refrigerant in a direction opposite to that of cooling the flow of the refrigerant to cause condensation of the refrigerant in the evaporator 10 and evaporation of the refrigerant in the condenser 30.

For example, in general, in the cooling cycle, the refrigerant evaporated in the evaporator 10 is compressed in the compressor 20, condensed through the condenser 30, expanded again through the expansion valve 40, and then evaporated to the evaporator 10. However, when the flow of the refrigerant is changed by the four-way valve 50, the refrigerant compressed in the compressor 20 is condensed through the evaporator 10 and expanded through the expansion valve 40, and the condenser ( After evaporating while passing 30), it has a flow provided to the compressor 20 again. That is, the four-way valve 50 selectively changes the flow of the refrigerant so that the condenser 30 and the evaporator 10 selectively evaporate or condense the refrigerant, so that the heat pump can heat or cool the heat medium.

Referring back to FIGS. 1 and 2, the underground heat exchanger 220 is a device that is buried in the ground to exchange heat with the heat of the ground, and the geothermal system 200 may be implemented including a plurality of (eg, m) underground heat exchangers. have.

The underground heat exchanger 220 may be implemented as a tube 221 consisting of a closed circuit through which a heat medium for exchanging heat with the heat of the ground passes through, and the tube 221 is provided so that the part buried in the ground sufficiently heats the heat medium and the heat of the ground. It can also be implemented in a zigzag shape or a spiral shape. In this case, the implementation form of the underground heat exchanger 220 may be implemented in various known forms.

Meanwhile, the heat medium filled in the underground heat exchanger 220 may be a liquid or gas having excellent heat transfer or heat exchange, and the heat medium may be heated or cooled by heat exchange with geothermal heat.

At this time, geothermal heat maintains a constant temperature when it reaches a certain depth. For example, if the temperature of the geothermal heat is 16°C, the temperature of the heat medium is heat-exchanged with the geothermal heat to adjust to a similar temperature. It may have low cooling and heat, and in winter, the temperature of the heating medium may have higher heat than the outside temperature.

The circulation valve 230 is a valve that controls the on/off of the underground heat exchanger 220, and the on/off is controlled by the control device 270 to control the flow of the heat medium into the underground heat exchanger 220. I can.

The circulation pump 240 controls the flow rate of the heat medium flowing in the geothermal system 200, but the operating efficiency is controlled in proportion to the number of operating units of the heat pump. For example, the circulation pump 240 is operated with 25% of the total energy when one of the four heat pumps included in the heat pump unit 210 is operating, and is included in the heat pump unit 210 When two of the four heat pumps are in operation, they may be operated with 50% of the total energy, and the operation efficiency may be determined by the control of the control device 270.

The hot water tank 250 stores hot water at a predetermined temperature. In particular, the hot water tank 250 may store hot water heated to a predetermined temperature (eg, 45° C.) by the heat energy recovered from the heat pump unit 210 during cooling.

The three-way valve 260 determines a movement path of the heat energy transmitted from the heat pump unit 210, but the first path A or the heat pump unit (A) connected to the hot water tank 250 from the heat pump unit 210 Any one of the second paths B connected from 210 to the underground heat exchanger 220 may be opened to determine a moving path of the heat energy recovered from the heat pump unit 210. That is, the three-way valve 260 moves the heat energy transferred from the heat pump unit 210 until the temperature of the hot water tank 250 reaches a predetermined temperature (eg, 45° C.). It is opened to the A) side so that the recovered thermal energy can be reused, and after the temperature of the hot water tank 250 reaches a predetermined temperature (eg, 45° C.), the heat energy transferred from the heat pump unit 210 is The movement path is opened toward the second path (B) so that the recovered heat energy is transferred to the ground. To this end, the three-way valve 260 may determine the movement path under the control of the control device 270.

That is, the control device 270 monitors the hot water temperature of the hot water tank 250, and collects the heat energy recovered from the heat pump unit 210 until the hot water temperature reaches a predetermined temperature (eg, 45° C.). It is possible to control the three-way valve 260 so as to transmit to the 250) side.

The control device 270 provides a communication interface for communication with the building energy management server (BEMS) 140, and based on a control command transmitted from the building energy management server (BEMS) 140, the geothermal system 200 Control the overall operation. In particular, the control device 270 is based on the control command n heat pumps (heat pump 1 (211), heat pump 2 (213), heat pump 3 (215), ..., heat pump n (217)) And a plurality of (e.g., m) underground heat exchangers 220 can be controlled on/off, and data generated by the geothermal system 200 can be digitally converted and transferred to the building energy management server (BEMS) 140. have.

To this end, the control device 270 records the driving history of each of n heat pumps (heat pump 1 (211), heat pump 2 (213), heat pump 3 (215), ..., heat pump n (217))). When a control command including the number of operating heat pumps is received from the building energy management server (BEMS) 140 and the driving information included, the number of operating heat pumps included in the control command and each of the heat pumps are After determining the driving target heat pump based on the driving information, the corresponding heat pump may be driven. In this case, the control device 270 may determine a driving target heat pump in consideration of an operating load according to an operating time of each of the heat pumps.

Alternatively, the control device 270 transmits the driving history information of each of the heat pumps to the building energy management server (BEMS) 140 in real time, so that the building energy management server (BEMS) 140 You can also manage the driving information. In this case, both the number of operating heat pumps and the heat pumps to be driven are determined by the building energy management server (BEMS) 140 and transmitted to the control device 270, and the control device 270 is a building energy management server (BEMS). Based on the information received from 140, only the on/off control of the heat pump will be performed.

Meanwhile, the control device 270 manages the thermal efficiency information of each of the plurality of underground heat exchangers 220, and receives a command for controlling the operation of the underground heat exchanger 220 from the building energy management server (BEMS) 140 If so, it is possible to preferentially select and drive an underground heat exchanger with high thermal efficiency.

To this end, the control device 270 may store the used time for each underground heat exchanger, and predict the thermal efficiency of the underground heat exchanger based on the use time. This is to use the characteristics of geothermal heat, which is less efficient when operating for 3 hours or more, and the control device 270 can predict the usable time of the underground heat exchanger for each month and for each season based on the usage time information.

Meanwhile, the control device 270 transmits the use time information for each underground heat exchanger to the building energy management server (BEMS) 140 in real time, so that the building energy management server (BEMS) 140 uses each of the underground heat exchangers. You can also let them manage time information. In this case, the thermal efficiency information of the underground heat exchanger is managed by the building energy management server (BEMS) 140, and the control device 270 is based on the information transmitted from the building energy management server (BEMS) 140. We will only perform on/off control of the heat exchanger.

Alternatively, the control device 270 may sequentially select a plurality of underground heat exchangers 220 at each preset period and measure thermal efficiency to manage each thermal efficiency. For example, the control device 270 sequentially operates the underground heat exchangers in units of a preset period (eg, 30 minutes), and then measures the temperature change of the heat medium (eg, water) through each of the underground heat exchangers. The thermal efficiency of each heat exchanger can be measured. In this case, the control device 270 determines in advance the minimum amount of heat medium required for detecting temperature changes and flows only the minimum amount to the underground heat exchanger, thereby minimizing the amount of energy required for measuring thermal efficiency. have.

4 is a schematic flowchart of a method of distributing a high-efficiency heat source using a geothermal heat source and solar power according to an embodiment of the present invention. 1, 2, and 4, a heat source distribution method using the heat source distribution system 100 according to an embodiment of the present invention is as follows.

First, in step S110, the solar module 110 generates electric energy from sunlight. That is, in step S110, the photovoltaic module 110 generates electric energy and transmits it to the grid 120.

In step S120, the building energy management server (BEMS) 140 monitors the flow of the electric energy, and in step S130, the building energy management server (BEMS) 140 monitors the generated electric energy based on the monitoring result. Calculate the amount of surplus power remaining after consumption. That is, in steps S120 and S130, the building energy management server (BEMS) 140 is the amount of surplus power consumed in the grid 120 and remaining after being produced in step S110, or ESS ( 130) and derive the remaining power remaining.

In step S140, the building energy management server (BEMS) 140 determines the operating efficiency of the heat source distribution system 100 based on the surplus power amount. At this time, in step S140, the operation quantity of the heat pumps ('211, 213, 215, 217') and the underground heat exchanger 220 in the geothermal system 200 and the circulation pump 240 based on the surplus power amount The operating efficiency of can be determined. That is, in step S140, the operation quantity of the heat pumps ('211, 213, 215, 217') in the geothermal system 200 is determined based on the surplus power amount, and the underground heat exchange is based on the operation quantity of the heat pump. The operating efficiency of the circulation pump 240 for controlling the flow rate in the heat source distribution system 100 may be determined based on the operating quantity of the unit 220 and the operating quantity of the heat pump. Particularly, the operating efficiency of the circulation pump 240 may be determined in proportion to the operating quantity of the heat pump.

For example, in step S140, when the geothermal system 200 includes four heat pumps, the building energy management server (BEMS) 140 is the operating efficiency of the heat source distribution system 100 when the surplus power amount is less than 25 KW. Is determined as 25% to determine the number of operating heat pumps as one, and when the surplus power is 25 KW or more and less than 50 KW, the operating efficiency of the heat source distribution system 100 is determined as 50% to determine the number of heat pumps operating as two, When the surplus power amount is 50 KW or more and less than 75 KW, the operating efficiency of the heat source distribution system 100 is determined as 75% to determine the number of heat pump operation units, and when the surplus power amount is 75 KW or more and 100 KW or less, the heat source distribution system 100 By determining the operating efficiency of 75%, the number of operating heat pumps can be determined by four.

In addition, in step S140, the building energy management server (BEMS) 140 determines the operating quantity of the underground heat exchanger 220 and the operating efficiency of the circulation pump based on the number of operating heat pumps, but the underground heat exchanger ( The number of operating units 220) may be determined in proportion to the number of operating units of the heat pump. For example, in step S140, the building energy management server (BEMS) 140, if the number of operating units of the heat pump is one out of four, the operating efficiency of the circulation pump is 25%, and the number of operating heat pumps In case of 2 out of 4 units, the operation efficiency of the circulation pump is set to 50%, when the number of operating units of the heat pump is 3 out of 4 units, the operational efficiency of the circulation pump is set to 75%. For four out of four, the operating efficiency of the circulation pump can be determined as 100%.

In step S150, based on the information determined in step S140, that is, the operating efficiency of the heat source distribution system 100, the heat pump, the underground heat exchanger, and the circulation pump are driven. That is, in step S150, the building energy management server (BEMS) 140 transmits the determined operation efficiency information to the control device 270, and the control device 270 provides the heat pump and the underground heat exchanger based on the information. And drive the circulation pump.

To this end, the heat source distribution method of the present invention may further include a heat pump management step (not shown) for managing driving information of each of the heat pumps and a thermal efficiency management step (not shown) for managing thermal efficiency of the underground heat exchangers. have.

The heat pump management step (not shown) is to manage driving information including the driving history of each of the heat pumps in the building energy management server (BEMS) 140 or the control device 270, which includes a plurality of heat pumps. When determining the heat pump to be operated, the operating load according to the operating time of each of the heat pumps can be considered, thereby enabling the operation of a high-efficiency heat pump, thereby increasing the operating efficiency of the entire heat source distribution system. It is to be.

That is, in step S150, the driving target heat pump is determined based on the information managed in the heat pump management step when the heat pump is driven, and the driving target heat pump is considered in consideration of the operating load according to the operating time of each of the heat pumps. After determining, by driving the heat pump to be driven, it is possible to increase the operating efficiency of the entire heat source distribution system.

Meanwhile, in the thermal efficiency management step (not shown), the building energy management server (BEMS) 140 or the control device 270 stores time information used for each underground heat exchanger, and based on the use time, the thermal efficiency of the underground heat exchanger This is to predict the usable time of the underground heat exchanger for each month and season based on the usage time by using the characteristics of geothermal heat, which is less efficient when operating for 3 hours or more.

In addition, in the thermal efficiency management step (not shown), the control device 270 may measure thermal efficiency by sequentially selecting m underground heat exchangers every preset period, and manage the underground heat exchangers based on the thermal efficiency. .

By managing the thermal efficiency of the underground heat exchanger in this way, in step S150, when the underground heat exchanger is driven, the underground heat exchanger having high thermal efficiency among a plurality of underground heat exchangers can be preferentially selected and driven. Accordingly, the entire heat source distribution system It is possible to increase the operating efficiency of.

In the above, the embodiments of the present invention have been described, but the scope of the present invention is not limited thereto, and the present invention is easily changed from the embodiment by a person having ordinary knowledge in the technical field to which the present invention belongs, and is recognized as equal. It includes all changes and modifications to the extent that it is made.

100: high-efficiency heat source distribution system 110: solar module
130: energy storage system 140: building energy management server
150: heat storage tank 200: geothermal system
210: heat pump unit 220: underground heat exchanger
230: circulation valve 240: circulation pump
250: hot water tank 260: three-way valve
270: control device

Claims (10)

In the heat source distribution system,
A solar module that receives sunlight and generates electric energy;
A building energy management server (BEMS) that monitors the flow of electric energy produced by the solar module and generates a control command accordingly;
It includes n heat pumps and m underground heat exchangers, and is provided by the underground heat exchanger by driving at least one heat pump and at least one underground heat exchanger according to a control command of the building energy management server (BEMS). A geothermal system for generating thermal energy by converting the temperature of heat; And
Including a heat storage tank for receiving and accumulating the remaining heat used as a heat source among the heat energy generated in the geothermal system,
The building energy management server (BEMS)
After determining the operating efficiency of the heat source distribution system based on the amount of surplus power consumed and remaining from the electric energy produced by the solar module, the number of operating units of the heat pump is determined based on the operating efficiency of the heat source distribution system, and the geothermal heat To the system,
The geothermal system
Determine the number of operating units of the underground heat exchanger in proportion to the number of operating units of the heat pump, determine the driving target heat pump in consideration of the operating load of the heat pump, and consider the thermal efficiency of the underground heat exchanger. A heat source distribution system using a geothermal heat source and photovoltaic power generation, characterized in that the group preferentially selects. delete The method of claim 1, wherein the geothermal system
N heat pumps driven by electric energy produced by the solar module;
M underground heat exchangers buried in the ground to exchange heat with the heat of the ground;
Provides a communication interface with the building energy management server (BEMS), but controls the on/off of the heat pumps and the underground heat exchangers based on a control command transmitted from the building energy management server (BEMS), and the geothermal system A control device that converts the data generated in digital to the building energy management server (BEMS); And
A heat source distribution system using a geothermal heat source and photovoltaic power generation, characterized in that it comprises a circulation pump that controls the flow rate in the geothermal system, and the operation efficiency is controlled in proportion to the number of operating units of the heat pump. The method of claim 3, wherein the control device
Based on the number of operating heat pumps delivered from the building energy management server (BEMS), a heat pump to be driven is determined among the n heat pumps, and then the corresponding heat pump is driven,
Managing driving information of each of the n heat pumps,
A heat source distribution system using a geothermal heat source and photovoltaic power generation, characterized in that determining a driving target heat pump in consideration of an operating load according to an operating time of each of the heat pumps. The method of claim 3, wherein the control device
A heat source distribution system using a geothermal heat source and photovoltaic power generation, characterized in that the m underground heat exchangers are sequentially selected for each preset period to measure thermal efficiency, and an underground heat exchanger having high thermal efficiency is preferentially selected and driven. The method of claim 3, wherein the geothermal system
A hot water tank for storing hot water at a predetermined temperature; And
A first path connected from the heat pump to the hot water tank; Or a three-way valve configured to determine a movement path of the heat energy recovered from the heat pump by opening any one of the second paths connected from the heat pump to the underground heat exchanger,
The control device
In order to reuse the heat energy recovered from the heat pump,
A heat source distribution system using a geothermal heat source and photovoltaic power generation, characterized in that controlling the three-way valve to transfer the heat energy recovered from the heat pump to the hot water tank until the temperature of the hot water reaches the predetermined temperature. In the heat source distribution method for distributing a heat source using a heat source distribution system including n heat pumps, m underground heat exchangers, and a circulation pump controlling a flow rate therebetween,
Solar power generation step of producing electric energy from sunlight;
An electrical energy monitoring step of monitoring the flow of the electrical energy;
A surplus power amount deriving step of deriving an amount of surplus power consumed and remaining out of the produced electrical energy based on the monitoring result;
An operation efficiency determination step of determining an operation efficiency of the heat source distribution system based on the amount of excess power; And
Including a driving step of driving the heat pump, the underground heat exchanger and the circulation pump based on the operating efficiency of the heat source distribution system,
The driving step is
A heat source distribution method, characterized in that the heat pump to be driven is determined in consideration of an operating load of the heat pump, and an underground heat exchanger to be driven is preferentially selected in consideration of thermal efficiency of the underground heat exchanger. The method of claim 7, wherein the operation efficiency determining step
A heat pump operation quantity determining step of determining an operation quantity of the heat pump based on the surplus power quantity;
Determining an operation quantity of the underground heat exchanger based on the operation quantity of the heat pump; And
Determining the operating efficiency of the circulation pump that controls the flow rate in the heat source distribution system based on the operating water amount of the heat pump, but determining the operating efficiency of the circulation pump in proportion to the operating water volume of the heat pump Heat source distribution method comprising the step. The method of claim 7,
Further comprising a heat pump management step of managing driving information of each of the heat pumps,
The driving step is
And driving the driving target heat pump after determining a driving target heat pump in consideration of an operating load according to an operating time of each of the heat pumps. The method of claim 7,
A thermal efficiency management step of sequentially selecting the m subterranean heat exchangers at each preset period to measure thermal efficiency, and managing the subterranean heat exchangers based on the thermal efficiency, further comprising:
The driving step is
A method of distributing a heat source, comprising preferentially selecting and driving an underground heat exchanger having high thermal efficiency among the underground heat exchangers.

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