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KR-102962815-B1 - Hybrid heating and cooling system for agriculture using new and renewable energy

KR102962815B1KR 102962815 B1KR102962815 B1KR 102962815B1KR-102962815-B1

Abstract

The present invention relates to an agricultural heating and cooling system, and more specifically, to an agricultural hybrid heating and cooling system utilizing new and renewable energy that provides the effect of minimizing water resource waste and minimizing the decrease in heating and cooling efficiency due to seasonal temperatures and daily temperature fluctuations.

Inventors

  • 이관형
  • 이상복
  • 이가형

Assignees

  • 블라젠 주식회사

Dates

Publication Date
20260508
Application Date
20250331

Claims (5)

  1. In an agricultural heating and cooling system comprising a heat pump unit (200) configured to include an evaporator (210), a condenser (220), a four-way valve (230), a compressor (240), and an expansion valve (250), It is configured to include an underground pipe (110) buried below the surface of the earth, and A geothermal source unit (100) that obtains thermal energy from a geothermal source through the circulation of a heat transfer fluid in the underground pipe (110) according to indoor heating and cooling settings; A heat pump unit (200) that receives thermal energy from a geothermal source to an evaporator (210) through the circulation of a heat medium fluid with the underground pipe (110) of the geothermal source unit (100) according to indoor heating and cooling settings, and heats and cools the first thermal storage tank (310A) by transferring thermal energy to a condenser (220) through heat exchange, thereby controlling the temperature of the liquid stored in the first thermal storage tank (310A); It is configured to include a first thermal storage tank (310A) for storing liquid for irrigation, fertilization, or nutrient solution, and A thermal storage tank unit (300) configured to receive thermal energy through the circulation of a heat medium fluid with the condenser (220) of the heat pump unit (200) according to indoor heating and cooling settings, thereby controlling the temperature of the liquid stored in the first thermal storage tank (310A), and supplying the temperature-controlled liquid to either a fan coil unit (400) or a water pipe; A fan coil unit (400) that cools and heats the indoor atmosphere by releasing thermal energy into the air from a temperature-controlled liquid supplied from the thermal storage unit (300) according to the indoor cooling and heating settings; A controller (50) that controls the ON/OFF of one or more selected from a heat pump unit (200) or a fan coil (410) according to an indoor heating and cooling setting, controls the ON/OFF of one or more selected pumps among a first heat medium circulation pump (120), a first heat medium supply pump (130), a first water supply pump (312a), and a second heat medium circulation pump (340), or controls the opening and closing of one or more selected valves among a first heat medium recovery valve (140), a first water supply valve (313a), a first water recovery valve (319a), a first water supply valve (314a), a recovery line valve (80), and a supply line valve (90); It is configured to include a server (10) that controls the above controller (50), The above controller (50) is, A sensing DB acquisition unit (51) that acquires temperature information from one or more of the above geothermal source unit (100), the above thermal storage tank unit (300), and the above fan coil unit (400) to generate a sensing DB, and A detection DB processing unit (52) that transmits the detection DB generated from the detection DB acquisition unit (51) to the first determination unit (56), and A control DB receiving unit (53) that receives the control DB generated from the first determination unit (56), and A control processing unit (54) that controls the ON/OFF of pumps and valves of one or more units among the geothermal source unit (100), the heat pump unit (200), the thermal storage tank unit (300), and the fan coil unit (400) based on the control DB received from the control DB receiving unit (53), and controls the circulation (flow) of the heat transfer fluid and the cooling and heating fluid, and A first setting unit (55) configured to receive a reference value for starting heat storage from the user, and A first determination unit (56) configured to receive a detection DB and, based on the received detection DB, calculate the absolute value of the temperature difference between one or more heat sources, such as a geothermal source unit (100) or a thermal storage tank unit (300), and a fan coil unit (400), and, if the absolute value of the temperature difference between the heat source and the fan coil unit (400) is greater than or equal to a reference value input to the first setting unit (55), generate a control DB to start heat storage from the fan coil unit (400) to the heat source, and if the absolute value of the temperature difference between the heat source and the fan coil unit (400) is less than the reference value input to the first setting unit (55), generate a control DB to stop heat storage from the fan coil unit (400) to the heat source. A hybrid heating and cooling system for agriculture utilizing renewable energy, characterized by being configured to receive a priority from the user for the priority of the heat source to start heat storage when the temperature of the first sensor (160) of the geothermal source unit (100) and the temperature of the second sensor (31) of the heat storage tank unit (300) are the same, and including a priority rule setting unit (57) that controls the first determination unit (56) to generate a control DB for starting and stopping heat storage in the heat source in order of the set priority.
  2. In Article 1, The above geothermal source unit (100) is, A first heat medium circulation pump (120) that circulates the heat medium fluid within the above underground pipe (110), and A first supply line (190) that supplies heat transfer fluid in the above underground pipe (110) to the above fan coil unit (400), and A first heat medium supply pump (130) that discharges the heat medium oil in the underground pipe (110) toward the fan coil unit (400) through the first supply line (190), and A first recovery line (180) that receives the heat transfer fluid circulated and discharged from the above fan coil unit (400) into the above underground pipe (110), and A hybrid heating and cooling system for agriculture utilizing renewable energy, characterized by comprising a first heat medium recovery valve (140) that opens and closes the supply of heat medium oil to the first recovery line (180).
  3. In Article 1, The above thermal storage tank unit (300) is, A second heat medium circulation line (350) that transmits thermal energy generated from the condenser (220) to the first thermal storage tank (310A) through the circulation of the heat medium oil, and A second heat medium circulation pump (340) that circulates the heat medium fluid within the second heat medium circulation line (350), and A second supply line (390) that supplies liquid stored in the first thermal storage tank (310A) to the fan coil unit (400), and A first water supply valve (313a) that opens and closes the supply of liquid to the second supply line (390), and A first irrigation supply line (315a) that supplies liquid stored in the first thermal storage tank (310A) to the irrigation pipe, and A first water supply valve (314a) that opens and closes the supply of liquid to the first water supply line (315a) above, and A first irrigation supply pump (312a) that discharges liquid stored in the first thermal storage tank (310A) toward the fan coil unit (400) through the second supply line (390) or discharges liquid stored in the first thermal storage tank (310A) toward the first irrigation supply line (315a) through the first irrigation supply line (315a), and A second recovery line (380) that receives the liquid circulated and discharged from the above fan coil unit (400) to the first thermal storage tank (310A), and A hybrid agricultural heating and cooling system utilizing renewable energy, characterized by comprising a first water recovery valve (319a) that opens and closes the supply of liquid to the second recovery line (380).
  4. In Article 1, The above fan coil unit (400) is, It is configured to include at least one fan coil (410) that cools and heats indoor air by releasing thermal energy into the air through the circulation of a heat medium oil supplied from a first supply line (190) or a liquid supplied from a second supply line (390), and A third supply line (490) that supplies at least one selected of a heat transfer fluid supplied from a first supply line (190) or a liquid supplied from a second supply line (390) to a fan coil (410), and A supply line valve (90) that opens and closes the supply of heat transfer fluid from the first supply line (190) and the supply of liquid from the second supply line (390) to supply at least one selected of the heat transfer fluid supplied from the first supply line (190) or the liquid supplied from the second supply line (390) to the fan coil (410), and A third recovery line (480) that discharges the heat transfer fluid or liquid circulated from the above fan coil (410) toward the first recovery line (180) or the second recovery line (380), and A hybrid heating and cooling system for agriculture utilizing renewable energy, characterized by comprising a recovery line valve (80) that opens and closes the discharge of heat transfer fluid from the first recovery line (180) and the discharge of liquid from the second recovery line (380) so as to discharge heat transfer fluid circulated from the fan coil (410) to the first recovery line (180) or discharge liquid circulated from the fan coil (410) to the second recovery line (380).
  5. In Article 1, The above-mentioned agricultural hybrid heating and cooling system utilizing new and renewable energy is, A hybrid heating and cooling system for agriculture utilizing renewable energy, further comprising a user terminal (60) configured to generate a control signal to control one or more of the geothermal source unit (100), heat pump unit (200), thermal storage tank unit (300), and fan coil unit (400) under the control of a user and transmit it to a server.

Description

Hybrid heating and cooling system for agriculture using new and renewable energy The present invention relates to an agricultural heating and cooling system, and more specifically, to an agricultural hybrid heating and cooling system utilizing new and renewable energy that provides the effect of minimizing water resource waste and minimizing the decrease in heating and cooling efficiency due to seasonal temperatures and daily temperature fluctuations. Since the growing environment in agriculture is determined by natural weather conditions, crop yields fluctuate significantly depending on the weather throughout the year. Instead of relying solely on these highly variable natural conditions, various forms of facility cultivation are being employed to achieve high yields or to generate high added value through crop scarcity by growing crops during seasons when production is impossible due to local natural conditions. A representative example of facility cultivation is the use of vinyl greenhouses, which enables agriculture even during periods when cultivation is difficult by artificially creating consistent growing conditions. Facilities farming is the cultivation of crops by artificially controlling the growing environment using artificial facilities such as glass greenhouses or vinyl greenhouses. It is also called facility horticulture because it generally involves the cultivation of horticultural crops such as vegetables, fruit trees, and flowers. Here, a facility refers to a simple structure made by covering a frame of various forms with materials such as glass or plastic. Facility farming is used as a method to increase yields by rapidly cultivating vegetables, fruits, and flowers, and is designed to maintain the internal temperature at room temperature during the winter using a separate heating system. When such a heating system is used, the temperature of the ground and the space are regulated together to provide the temperature and humidity necessary for crop growth, thereby promoting growth and enabling high productivity. Modern facility farming utilizes various auxiliary devices to artificially control cultivation conditions such as temperature, light, and moisture, maintaining an environment suitable for crop growth and offering the advantage of year-round production. Today, systems utilizing computers to precisely control the cultivation environment have been established, contributing to increased farm income by enabling the planned production and shipment of crops. However, even when crops are grown in artificial facilities such as glass greenhouses or vinyl greenhouses, cultivation generally does not proceed smoothly because sunlight is strong and temperatures are high in the summer, while temperatures are low in the winter. Therefore, various heating and cooling systems have been developed to minimize the impact of temperature in facility agriculture, and 'Reference 1' is an example of such technology. 'Reference 1' relates to a greenhouse heating and cooling system using a heat pump, comprising a heat pump, a storage tank equipped with a temperature sensor connected to the heat pump by a pipe, an auxiliary boiler connected by a pipe with a pump installed on the other side of the storage tank, a greenhouse heating and cooling device connected by a pipe with a pump installed on the storage tank, or a mixing tank connected by a pipe with a pump installed on the other side of the storage tank and equipped with a temperature sensor, a recovery tank connected by a pipe with a pump installed on the mixing tank, a water curtain device connected to the recovery tank, and recovery pipes installed on both sides of the water curtain device inside the greenhouse. Recently, heat pump cooling and heating systems have been used as heating devices for greenhouses. A heat pump cooling and heating system is a general term for cooling and heating systems using gas engine-driven (GHP; Gas Heat Pump), electric compression (EHP; Electric Heat Pump), or geothermal source (GSHPs; Ground Source Heat Pumps). These GHPs, EHPs, and GSHPs are all devices that provide cooling and heating through the circulation of a refrigerant in a heat pump cycle. Typically, the term "heat pump unit (GHP, EHP, or GSHPs)" refers to a device that performs both cooling and heating simultaneously as a single unit depending on the season by reversing the direction of refrigerant flow for cooling and heating. However, it refers to the remaining part excluding the indoor unit, which performs both cooling and heating together with a gas circulation indoor unit (an indoor unit that condenses or evaporates the refrigerant) while equipped with a compressor, heat exchanger, expansion valve, and 4-way valve in the refrigerant path. As is widely known, heat pump heating and cooling systems are used by connecting multiple indoor units (heating and cooling air conditioning units) to a single outdoor heat source, or by connecting multiple outdoor heat sour