KR-20260065462-A - Facility horticulture system utilizing evaporative cooling

Abstract

The facility horticulture system using evaporative cooling according to the present invention has the advantage of maximizing the cooling and heating efficiency of the greenhouse while further improving energy efficiency by performing at least one of a thermal storage cooling and heating mode using a geothermal heat pump and a thermal storage tank, an outdoor air cooling and heating mode using outdoor air, and an evaporative cooling mode using the principle of evaporative cooling of cooling water, or by selecting some of these and performing them in stages, or by selectively combining at least some of these.

Inventors

• 이성주
• 김민수

Assignees

• 에너지팜스 주식회사

Dates

Publication Date

20260508

Application Date

20250124

Claims (14)

1. A geothermal heat pump that generates hot and cold water using an underground heat source; A thermal storage tank for storing hot and cold water generated from the above-mentioned geothermal heat pump; A fan coil unit comprising a coil formed to allow hot and cold water from the thermal storage tank to flow in, provided inside the air conditioning room, and a fan for circulating air in the air conditioning room; A vaporization cooling unit that supplies cooling water supplied from the outside to flow along the surface of the coil to vaporize the cooling water and cool the air in the air conditioning room; An air conditioning supply unit that supplies air conditioning air, heat-exchanged in the above-mentioned fan coil unit, to a greenhouse where a crop cultivation unit is installed; A thermal storage channel for connecting the above geothermal heat pump and the above thermal storage tank to supply hot and cold water generated from the above geothermal heat pump to the above thermal storage tank; A thermal storage circulation path for connecting the thermal storage tank and the geothermal heat pump to circulate hot and cold water from the thermal storage tank to the geothermal heat pump; A hot and cold water supply path for connecting the above thermal storage tank and the above fan coil unit to supply hot and cold water stored in the above thermal storage tank to the above fan coil unit; A hot and cold water recovery path connecting the above fan coil unit and the above thermal storage tank to recover hot and cold water from the above fan coil unit to the above thermal storage tank; A hot and cold water pump installed in the above hot and cold water supply path to regulate the flow rate of hot and cold water supplied to the coil; A cooling water pump provided in the above vaporization cooling unit for controlling the flow rate of cooling water supplied to the surface of the coil; An outdoor temperature sensor for measuring the outdoor temperature of the above greenhouse; An outdoor humidity sensor for measuring the outdoor humidity of the above greenhouse; An indoor temperature sensor for measuring the indoor temperature of the above greenhouse; An indoor humidity sensor for measuring the indoor humidity of the above greenhouse; An outside air damper installed in the air conditioning room so as to be openable and closable to control the inflow of outside air into the air conditioning room; A ventilation damper installed to open and close a ventilation opening connecting the air conditioning room and the greenhouse; A control unit comprising, wherein the operation of the hot and cold water pump, the cooling water pump, the outside air damper, and the ventilation damper is controlled according to values measured by the outdoor temperature sensor, the outdoor humidity sensor, the indoor temperature sensor, and the indoor humidity sensor, to perform at least one of the following modes: a thermal storage cooling and heating mode in which the hot and cold water pump is operated to cool and heat the air using hot and cold water; an evaporative cooling mode in which the cooling water pump is operated to humidify and cool the air using cooling water; and an outside air cooling and heating mode in which the outside air damper is operated to cool and heat the air using outside air. Facility horticulture system utilizing evaporative cooling.
2. In claim 1, The above vaporization cooling unit is, A cooling tank in which cooling water supplied from the outside is temporarily stored, and A cooling water flow path formed to guide the cooling water stored in the cooling water tank to the coil and having the cooling water pump installed therein, and A vaporization tank provided on the upper side of the coil, wherein cooling water supplied from the cooling water path is temporarily stored and the cooling water is discharged to flow along the surface of the coil. Facility horticulture system utilizing evaporative cooling.
3. In claim 1, The above control unit is, If the indoor humidity value measured by the indoor humidity sensor is lower than the preset indoor humidity target range and the indoor temperature value measured by the indoor temperature sensor is higher than the preset indoor temperature target range, it is determined that humidification and cooling are required inside the greenhouse. If the outdoor humidity value measured by the outdoor humidity sensor is greater than or equal to a preset upper limit for outdoor humidity, and the outdoor temperature value measured by the outdoor temperature sensor is greater than or equal to a preset upper limit for outdoor temperature, Controls the operation of the hot and cold water pump, shields the outside air damper, and operates the cooling water pump to heat exchange the cooling water flowing over the surface of the coil in the fan coil unit with the air in the air conditioning room, thereby primarily performing the evaporative cooling mode for a preset time to cool the greenhouse using the air cooled as the cooling water evaporates. If, even after the above-mentioned set time has elapsed, the indoor humidity measurement value does not fall within the indoor humidity target range and the indoor temperature measurement value does not fall within the indoor temperature target range, Controlling to additionally operate the above hot and cold water pump to heat exchange the cold water from the thermal storage tank with the air in the air conditioning room in the above fan coil unit, and to additionally perform the above thermal storage cooling mode, which cools the greenhouse using the air cooled in the fan coil unit. Facility horticulture system utilizing evaporative cooling.
4. In claim 1, The above control unit is, If the indoor humidity value measured by the indoor humidity sensor is lower than the preset indoor humidity target range and the indoor temperature value measured by the indoor temperature sensor is higher than the preset indoor temperature target range, it is determined that humidification and cooling are required inside the greenhouse. If the outdoor humidity value measured by the outdoor humidity sensor is less than or equal to a preset lower limit for outdoor humidity, and the outdoor temperature value measured by the outdoor temperature sensor is greater than or equal to a preset upper limit for outdoor temperature, Controls the operation of the hot and cold water pump, shields the outside air damper, and operates the cooling water pump to heat exchange the cooling water flowing over the surface of the coil in the fan coil unit with the air in the air conditioning room, thereby primarily performing the evaporative cooling mode for a preset time to cool the greenhouse using the air cooled as the cooling water evaporates. If, even after the above-mentioned set time has elapsed, the indoor humidity measurement value does not fall within the indoor humidity target range and the indoor temperature measurement value does not fall within the indoor temperature target range, Controlling to additionally operate the above hot and cold water pump to heat exchange the cold water from the thermal storage tank with the air in the air conditioning room in the above fan coil unit, and to additionally perform the above thermal storage cooling mode, which cools the greenhouse using the air cooled in the fan coil unit. Facility horticulture system utilizing evaporative cooling.
5. In claim 1, The above control unit is, If the indoor humidity value measured by the indoor humidity sensor is lower than the preset indoor humidity target range and the indoor temperature value measured by the indoor temperature sensor is higher than the preset indoor temperature target range, it is determined that humidification and cooling are required inside the greenhouse. If the outdoor humidity value measured by the outdoor humidity sensor is greater than or equal to a preset upper limit for outdoor humidity, and the outdoor temperature value measured by the outdoor temperature sensor is less than or equal to a preset lower limit for outdoor temperature, Controlling the operation of the hot and cold water pump and the cooling water pump, opening the outside air damper and the ventilation damper, and supplying the outside air flowing into the air conditioning room to the greenhouse to cool the greenhouse, thereby controlling the outside air cooling mode to be performed primarily for a preset first setting time, If, even after the first set time has elapsed, the indoor humidity measurement value does not fall within the indoor humidity target range and the indoor temperature measurement value does not fall within the indoor temperature target range, Controlling the above cooling water pump to additionally operate it so that the cooling water flowing over the surface of the coil in the fan coil unit exchanges heat with the air in the air conditioning room, and cools the greenhouse using the air cooled as the cooling water evaporates, thereby additionally performing the above evaporative cooling mode for a preset second setting time. If, even after the second set time has elapsed, the indoor humidity measurement value does not fall within the indoor humidity target range and the indoor temperature measurement value does not fall within the indoor temperature target range, Controlling to additionally operate the above hot and cold water pump to heat exchange the cold water from the thermal storage tank with the air in the air conditioning room in the above fan coil unit, and to additionally perform the above thermal storage cooling mode, which cools the greenhouse using the air cooled in the fan coil unit. Facility horticulture system utilizing evaporative cooling.
6. In claim 1, The above control unit is, If the indoor humidity value measured by the indoor humidity sensor is lower than the preset indoor humidity target range and the indoor temperature value measured by the indoor temperature sensor is higher than the preset indoor temperature target range, it is determined that humidification and cooling are required inside the greenhouse. If the outdoor humidity value measured by the outdoor humidity sensor is less than or equal to a preset lower limit for outdoor humidity, and the outdoor temperature value measured by the outdoor temperature sensor is less than or equal to a preset lower limit for outdoor temperature, Controlling the operation of the hot and cold water pump and the cooling water pump, opening the outside air damper and the ventilation damper, and supplying the outside air flowing into the air conditioning room to the greenhouse to cool the greenhouse, thereby controlling the outside air cooling mode to be performed primarily for a preset first setting time, If, even after the first set time has elapsed, the indoor humidity measurement value does not fall within the indoor humidity target range and the indoor temperature measurement value does not fall within the indoor temperature target range, Controlling the above cooling water pump to additionally operate it so that the cooling water flowing over the surface of the coil in the fan coil unit exchanges heat with the air in the air conditioning room, and cools the greenhouse using the air cooled as the cooling water evaporates, thereby additionally performing the above evaporative cooling mode for a preset second setting time. If, even after the second set time has elapsed, the indoor humidity measurement value does not fall within the indoor humidity target range and the indoor temperature measurement value does not fall within the indoor temperature target range, Controlling to additionally operate the above hot and cold water pump to heat exchange the cold water from the thermal storage tank with the air in the air conditioning room in the above fan coil unit, and to additionally perform the above thermal storage cooling mode, which cools the greenhouse using the air cooled in the fan coil unit. Facility horticulture system utilizing evaporative cooling.
7. In claim 1, The above control unit is, If the indoor humidity value measured by the indoor humidity sensor is within a preset indoor humidity target range and the indoor temperature value measured by the indoor temperature sensor is higher than the preset indoor temperature target range, it is determined that cooling is required inside the greenhouse. If the outdoor temperature value measured by the above outdoor temperature sensor is greater than or equal to a preset outdoor temperature upper limit, The above-mentioned outside air damper is shielded, and The above-mentioned cooling mode, which operates the above-mentioned cooling water pump while controlling the rotational speed of the above-mentioned cooling water pump so that the flow rate of the cooling water supplied to the surface of the coil becomes a preset minimum flow rate, thereby heat-exchanging the cooling water flowing on the surface of the coil in the above-mentioned fan coil unit with the air in the above-mentioned air conditioning room, and cools the above-mentioned greenhouse using the air cooled as the cooling water evaporates; Controlling to operate the hot and cold water pump to perform the thermal storage cooling mode, which involves heat exchange between the cold water from the thermal storage tank and the air in the air conditioning room in the fan coil unit, and cooling the greenhouse using the air cooled in the fan coil unit. Facility horticulture system utilizing evaporative cooling.
8. In claim 1, The above control unit is, If the indoor humidity value measured by the indoor humidity sensor is within a preset indoor humidity target range and the indoor temperature value measured by the indoor temperature sensor is higher than the preset indoor temperature target range, it is determined that cooling is required inside the greenhouse. If the outdoor temperature value measured by the above outdoor temperature sensor is less than or equal to a preset lower outdoor temperature limit, Controlling the operation of the hot and cold water pump and the cooling water pump, opening the outside air damper and the ventilation damper, and supplying the outside air flowing into the air conditioning room to the greenhouse to cool the greenhouse, thereby controlling the outside air cooling mode to be performed primarily for a preset first setting time, If the indoor temperature measurement value does not fall within the indoor temperature target range even after the above first setting time has elapsed, The above-mentioned cooling mode, wherein the above-mentioned cooling water pump is additionally operated, and the rotational speed of the above-mentioned cooling water pump is controlled so that the flow rate of the cooling water supplied to the surface of the coil becomes a preset minimum flow rate, thereby heat-exchanging the cooling water flowing on the surface of the coil in the fan coil unit with the air in the air conditioning room, and cooling the greenhouse using the air cooled as the cooling water evaporates; Controlling to additionally operate the above hot and cold water pump to heat exchange the cold water from the thermal storage tank with the air in the air conditioning room in the above fan coil unit, and to additionally perform the above thermal storage cooling mode, which cools the greenhouse using the air cooled in the fan coil unit. Facility horticulture system utilizing evaporative cooling.
9. In claim 1, The above control unit is, If the indoor humidity value measured by the indoor humidity sensor is lower than the preset indoor humidity target range and the indoor temperature value measured by the indoor temperature sensor is lower than the preset indoor temperature target range, it is determined that humidification and heating are required inside the greenhouse. If the outdoor humidity value measured by the outdoor humidity sensor is greater than or equal to a preset upper limit for outdoor humidity, and the outdoor temperature value measured by the outdoor temperature sensor is greater than or equal to a preset upper limit for outdoor temperature, Controls the operation of the hot and cold water pump and the cooling water pump to stop, and opens the outside air damper to supply outside air flowing into the air conditioning room to the greenhouse to heat the greenhouse, thereby primarily performing the outside air heating mode for a preset time. If, even after the above-mentioned set time has elapsed, the indoor humidity measurement value does not fall within the indoor humidity target range and the indoor temperature measurement value does not fall within the indoor temperature target range, Controlling to additionally perform the thermal storage heating mode by additionally operating the above hot and cold water pump to heat exchange the hot water from the thermal storage tank with the air in the air conditioning room in the above fan coil unit, and heating the greenhouse using the air heated in the fan coil unit. Facility horticulture system utilizing evaporative cooling.
10. In claim 1, The above control unit is, If the indoor humidity value measured by the indoor humidity sensor is lower than the preset indoor humidity target range and the indoor temperature value measured by the indoor temperature sensor is lower than the preset indoor temperature target range, it is determined that humidification and heating are required inside the greenhouse. If the outdoor humidity value measured by the outdoor humidity sensor is less than or equal to a preset lower limit for outdoor humidity, and the outdoor temperature value measured by the outdoor temperature sensor is greater than or equal to a preset upper limit for outdoor temperature, Stop the operation of the above hot and cold water pump, and The outdoor air heating mode, which heats the greenhouse by opening the outdoor air damper to supply outdoor air flowing into the air conditioning room to the greenhouse, and Control to primarily perform the evaporative cooling mode for a preset time period by operating the cooling water pump to heat exchange the cooling water flowing over the surface of the coil in the fan coil unit with the air in the air conditioning room, thereby humidifying the greenhouse using the humidified air as the cooling water evaporates, and If, even after the above-mentioned set time has elapsed, the indoor humidity measurement value does not fall within the indoor humidity target range and the indoor temperature measurement value does not fall within the indoor temperature target range, Controlling to additionally perform the thermal storage heating mode by additionally operating the above hot and cold water pump to heat exchange the hot water from the thermal storage tank with the air in the air conditioning room in the above fan coil unit, and heating the greenhouse using the air heated in the fan coil unit. Facility horticulture system utilizing evaporative cooling.
11. In claim 1, The above control unit is, If the indoor humidity value measured by the indoor humidity sensor is lower than the preset indoor humidity target range and the indoor temperature value measured by the indoor temperature sensor is lower than the preset indoor temperature target range, it is determined that humidification and heating are required inside the greenhouse. If the outdoor humidity value measured by the outdoor humidity sensor is greater than or equal to a preset upper limit for outdoor humidity, and the outdoor temperature value measured by the outdoor temperature sensor is less than or equal to a preset lower limit for outdoor temperature, The above-mentioned outside air damper is shielded, and The thermal storage heating mode, which operates the hot and cold water pump to heat exchange the hot water from the thermal storage tank with the air in the air conditioning room in the fan coil unit and heats the greenhouse using the air heated in the fan coil unit, and Controlling to perform the evaporative cooling mode for humidifying the greenhouse by operating the cooling water pump to heat exchange the cooling water flowing over the surface of the coil in the fan coil unit with the air in the air conditioning room, and using the humidified air as the cooling water evaporates. Facility horticulture system utilizing evaporative cooling.
12. In claim 1, The above control unit is, If the indoor humidity value measured by the indoor humidity sensor is lower than the preset indoor humidity target range and the indoor temperature value measured by the indoor temperature sensor is lower than the preset indoor temperature target range, it is determined that humidification and heating are required inside the greenhouse. If the outdoor humidity value measured by the outdoor humidity sensor is less than or equal to a preset lower limit for outdoor humidity, and the outdoor temperature value measured by the outdoor temperature sensor is less than or equal to a preset lower limit for outdoor temperature, The above-mentioned outside air damper is shielded, and The thermal storage heating mode, which operates the hot and cold water pump to heat exchange the hot water from the thermal storage tank with the air in the air conditioning room in the fan coil unit and heats the greenhouse using the air heated in the fan coil unit, and Controlling to perform the evaporative cooling mode for humidifying the greenhouse by operating the cooling water pump to heat exchange the cooling water flowing over the surface of the coil in the fan coil unit with the air in the air conditioning room, and using the humidified air as the cooling water evaporates. Facility horticulture system utilizing evaporative cooling.
13. In claim 1, The above control unit is, If the indoor humidity value measured by the indoor humidity sensor is within a preset indoor humidity target range and the indoor temperature value measured by the indoor temperature sensor is lower than the preset indoor temperature target range, it is determined that heating is required inside the greenhouse. If the outdoor temperature value measured by the above outdoor temperature sensor is greater than or equal to a preset outdoor temperature upper limit, Controls the operation of the hot and cold water pump and the cooling water pump to stop, and opens the outside air damper to supply outside air flowing into the air conditioning room to the greenhouse to heat the greenhouse, thereby primarily performing the outside air heating mode for a preset time. If the indoor temperature measurement does not fall within the indoor temperature target range even after the above-mentioned set time has elapsed, Controlling to additionally perform the thermal storage heating mode by additionally operating the above hot and cold water pump to heat exchange the hot water from the thermal storage tank with the air in the air conditioning room in the above fan coil unit, and heating the greenhouse using the air heated in the fan coil unit. Facility horticulture system utilizing evaporative cooling.
14. In claim 1, The above control unit is, If the indoor humidity value measured by the indoor humidity sensor is within a preset indoor humidity target range and the indoor temperature value measured by the indoor temperature sensor is lower than the preset indoor temperature target range, it is determined that heating is required inside the greenhouse. If the outdoor temperature value measured by the above outdoor temperature sensor is less than or equal to a preset lower outdoor temperature limit, Controlling to stop the operation of the cooling water pump, shielding the outside air damper, and operating the hot and cold water pump to perform the thermal storage heating mode, wherein the hot water from the thermal storage tank in the fan coil unit heats the air in the air conditioning room and heats the greenhouse using the air heated in the fan coil unit. Facility horticulture system utilizing evaporative cooling.

Description

Facility horticulture system utilizing evaporative cooling The present invention relates to a facility horticulture system utilizing evaporative cooling, and more specifically, to a facility horticulture system utilizing evaporative cooling configured to selectively utilize outside air, a heat pump, and evaporative cooling to cool, heat, and humidify the facility, thereby further improving crop growth rates and energy efficiency. Generally, facility horticulture refers to the cultivation of crops such as vegetables, flowers, and fruit trees using greenhouses or vinyl greenhouses. Although facility horticulture is capital-intensive because it requires constructing facilities such as greenhouses or vinyl greenhouses and artificially controlling the crop cultivation environment, it has the advantage of allowing control of moisture, temperature, and nutrients, which are important for crop cultivation, thereby enabling control of the harvest time and the extension of the growing season throughout the year. Conventional greenhouse horticulture faces the problem of high facility and operating costs because the cultivation space within the facility must be cooled or heated. Furthermore, the use of fossil fuels for heating contributes to global warming. FIG. 1 is a schematic diagram showing a facility horticulture system using vaporization cooling according to an embodiment of the present invention. Figure 2 is an enlarged view of part A in Figure 1. FIG. 3 is a diagram showing the evaporative cooling mode of a facility horticulture system according to an embodiment of the present invention. FIG. 4 is a diagram showing the evaporative cooling mode and the thermal storage cooling mode of a facility horticulture system according to an embodiment of the present invention. FIG. 5 is a diagram showing the outdoor air cooling mode of a facility horticulture system according to an embodiment of the present invention. FIG. 6 is a diagram showing the outdoor air cooling mode and the evaporative cooling mode of a facility horticulture system according to an embodiment of the present invention. FIG. 7 is a diagram showing the outdoor air cooling mode, evaporative cooling mode, and thermal storage cooling mode of a facility horticulture system according to an embodiment of the present invention. FIG. 8 is a diagram showing the outdoor air heating mode of a facility horticulture system according to an embodiment of the present invention. FIG. 9 is a diagram showing the outdoor air heating mode and the thermal storage heating mode of a facility horticulture system according to an embodiment of the present invention. FIG. 10 is a diagram showing the outdoor air heating mode and the evaporative cooling mode of a facility horticulture system according to an embodiment of the present invention. FIG. 11 is a diagram showing the outdoor air heating mode, evaporative cooling mode, and thermal storage heating mode of a facility horticulture system according to an embodiment of the present invention. FIG. 12 is a diagram showing the thermal storage heating mode and the evaporative cooling mode of a facility horticulture system according to an embodiment of the present invention. FIG. 13 is a diagram showing the heat storage heating mode of a facility horticulture system according to an embodiment of the present invention. FIG. 14 is a diagram showing the control configuration of a facility horticulture system according to an embodiment of the present invention. Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. FIG. 1 is a schematic diagram showing a facility horticulture system using evaporative cooling according to an embodiment of the present invention. FIG. 2 is an enlarged view of part A in FIG. 1. Referring to FIGS. 1 and 2, a facility horticulture system according to an embodiment of the present invention includes a greenhouse (10), an air conditioning room (20), a geothermal heat pump (30), an underground heat exchanger (40), a geothermal pump (50), a thermal storage tank (60), a thermal storage pump (70), a hot and cold water pump (80), a fan coil unit (100), an air conditioning air supply unit (150), an evaporative cooling unit (200), a cooling water pump (210), an outdoor temperature sensor (2), an outdoor humidity sensor (4), an indoor temperature sensor (6), an indoor humidity sensor (8), an outdoor air damper (300), and a control unit (400). The above greenhouse (10) is a facility that forms a space for cultivating crops by being equipped with a crop cultivation section (11). The above air conditioning room (20) is provided on the outside of the greenhouse (10) and forms a space where outside air is introduced and heat is exchanged in the fan coil unit (100). An outside air inlet (21) is formed on one side wall of the air conditioning room (20). For example, a flow guide wall (25) is installed at a position facing the outside air inlet (21) inside the air conditioning