KR20100067156A

KR20100067156A - Hybrid heat transfer system with heat pump for green house

Info

Publication number: KR20100067156A
Application number: KR1020080125597A
Authority: KR
Inventors: 김성수; 김주섭; 한형석
Original assignee: 김성수; 김주섭; 한형석
Priority date: 2008-12-11
Filing date: 2008-12-11
Publication date: 2010-06-21

Abstract

The present invention provides a hybrid heat pump type heat exchange system for a greenhouse capable of controlling the temperature and humidity of the greenhouse.

Greenhouse hybrid heat pump type heat exchange system according to the present invention, the first tank for storing hot or cold water; A second tank for storing hot or cold water; A geothermal heat exchanger for exchanging hot water or cold water of the first tank and the second tank with geothermal heat; A heat exchange device for heating or cooling a greenhouse by circulating the hot water or the cold water supplied from the first tank or the second tank; A heat pump hydrodynamically connected to the first tank and the second tank to direct thermal energy of a low temperature portion to the high temperature portion; And a cooling tower fluidly connected to the heat pump and the first tank to discharge heat energy of the first tank into the atmosphere.

Description

HYBRID HEAT TRANSFER SYSTEM WITH HEAT PUMP FOR GREEN HOUSE}

The present invention relates to a hybrid heat pump type heat exchange system for greenhouses, and more particularly, to a hybrid heat pump type heat exchange system for greenhouses for cooling and dehumidifying a greenhouse.

Greenhouses are a means of increasing farmers' income by growing and raising their products in any season in the agriculture industry.

In such a greenhouse, the crops can be grown normally only when the environment that the crops need is maintained, that is, a constant room temperature and a proper humidity. During the winter season, which is not suitable for cultivation, the temperature during the day rises higher than the outdoors due to sunshine, and heat is maintained for a certain time inside the greenhouse, but it is impossible to maintain the required temperature simply by forming a greenhouse. Therefore, it is necessary to increase the internal temperature of the greenhouse by using a heating device in a low temperature period such as winter, on the contrary, when the temperature is too high, such as summer, it is necessary to lower the internal temperature of the greenhouse by using a cooling device. In addition, if the humidity in the greenhouse is properly adjusted according to the object to be cultivated or reared, or if the crop is grown, it may be more ideal if the CO 2 concentration can be maintained for the growth of the crop.

1 is a configuration diagram of a greenhouse according to the prior art, the CO2 sensor (1), humidity sensor (2), temperature sensor (3), CO2 tank (6), boiler (5), coil (4) and opening and closing window (7) is configured. By using the values measured from the temperature sensor 3 and the humidity sensor 2, if the temperature and humidity is above the reference value, the opening and closing window 7 is opened and the temperature and humidity are lowered by discharging moisture and warmth in the greenhouse. In addition, when the temperature in the greenhouse decreases, the boiler 5 is operated and the temperature of the greenhouse is increased through the coil 4 installed in the greenhouse. At this time, since the CO 2 in the greenhouse is discharged through the opening and closing window 7 to decrease the CO 2 concentration in the greenhouse, it is necessary to raise the CO 2 concentration to an appropriate value. Therefore, the CO 2 stored in the liquefied state in the CO 2 tank 6 is vaporized and supplied through the CO 2 supply pipe installed in the greenhouse.

However, the greenhouse according to the prior art lowers the humidity and temperature by opening the opening and closing window (7), especially if you want to lower only the humidity, such as winter, because the boiler (5) is operated to increase the temperature again, so much heat loss As the CO2 is lost through the opening / closing window 7, it has to be replenished, so the maintenance cost due to the operation of the boiler 5 and the purchase of CO2 increases, and the greenhouse effect due to the CO2 released into the atmosphere. There is a problem that causes environmental pollution. In addition, when the humidity outside the greenhouse is high, it is not possible to expect a sufficient dehumidifying effect by only opening the opening and closing window 7, and in particular, during the rainy season or the like, the opening and closing window 7 may not be opened. There is a problem that can cause infectious diseases.

The present invention devised to solve the above problems is an object of the present invention to provide a hybrid heat pump type heat exchange system for a greenhouse that can control the temperature and humidity inside the greenhouse without air flow outside the greenhouse.

It is another object of the present invention to provide a hybrid heat pump type heat exchange system for a greenhouse without CO2 loss.

In another aspect, the present invention is to provide a hybrid heat pump type heat exchange system for a greenhouse that can use geothermal heat in the heating and cooling of the greenhouse.

In addition, the present invention has another object to provide a hybrid heat pump type heat exchange system for a greenhouse that can greatly increase the thermal efficiency by reducing the heat loss in the heating and cooling of the greenhouse.

In addition, another object of the present invention to provide a hybrid heat pump type heat exchange system for a greenhouse that can reduce the number of geothermal pores.

In addition, another object of the present invention is to provide a hybrid heat pump type heat exchange system for a greenhouse capable of uniformly maintaining a vertical temperature distribution and a humidity distribution in a greenhouse.

In addition, another object of the present invention is to provide a hybrid heat pump type heat exchange system for a greenhouse capable of more precisely controlling temperature and humidity in the greenhouse.

According to the hybrid heat pump type heat exchange system for a greenhouse of the present invention, since the temperature and humidity of the greenhouse can be controlled without the outside of the greenhouse and the air flow, the CO2 is not emitted to the atmosphere, thereby reducing the CO2 consumption, thereby reducing the purchase of CO2. It is possible to reduce the cost and prevent the environmental pollution that can cause the greenhouse effect. In addition, it is possible to use geothermal heat, reduce heat loss, and recycle waste heat, thereby greatly improving thermal efficiency. Accordingly, the number of geothermal pores can be reduced, thereby reducing geothermal hole installation cost and maintenance cost. have. In addition, by operating the duct and the fan coil unit in combination, there is an effect that the temperature distribution and humidity distribution in the greenhouse can be controlled quickly and uniformly in an optimal state.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

Figure 2 is a schematic diagram of a hybrid heat pump type heat exchange system for a greenhouse according to an embodiment of the present invention, the heat exchange unit 510, heat pump 604, geothermal heat exchanger 605, storage tank 602, waste heat A tank 601 and a cooling tower 603. In addition, the heat exchange unit 510 includes a first heat exchange coil 512, a second heat exchange coil 513, a fan 511, and an ultraviolet sterilizer 515.

The heat exchange system and the operation of the greenhouse using the same can be largely divided into four cases: ① cooling and dehumidifying greenhouses in summer ② heating and dehumidifying greenhouses in winter, ③ accumulating cold operation using air and geothermal in summer, and ④ waste heat and geothermal in greenhouses in winter Thermal storage operation using.

① Summer greenhouse cooling and dehumidification

In the summer, cold water is stored in the storage tank 602 and the temperature of the cold water located below the storage tank 602 is lower than that of the cold water in the upper portion, and hot water is stored in the waste heat tank 601 and the upper portion of the waste heat tank 601. The temperature of hot water located at is higher than the hot water at the bottom. When the third pump 303 is operated to cool the greenhouse 400, the cold water below the storage tank 602 is supplied to the second heat exchange coil 513 through the third three-way valve 203 and the greenhouse 400. The air inside is cooled while passing through the second heat exchange coil 513 by the fan 511. The air cooled while passing through the second heat exchange coil 513 is supplied to the greenhouse 400 again through the duct 514, and the cold water whose temperature rises through the second heat exchange coil 513 opens the valves 116 and 113. After passing through the storage tank 602. If the cooling load is large and the greenhouse 400 temperature is not cooled below the set value, the valves 115 and 114 are opened to circulate cold water in the first heat exchange coil 512 to increase the cooling capacity. 101 and 102 are closed to block cold water inflow into the waste heat tank 601.

In order to reduce the humidity in the greenhouse 400, when the third pump 303 is operated, cold water below the storage tank 602 is supplied to the second heat exchange coil 513 through the third three-way valve 203. The air in the greenhouse 400 passes through the second heat exchange coil 513 by the fan 511. At this time, since the temperature of the second heat exchange coil 513 is lower than that of air, water vapor in the air condenses to form condensation water, and the air passing through the second heat exchange coil 513 through the duct 514 is lowered in humidity. The cold water is supplied to the 400 and the temperature of which rises after passing through the second heat exchange coil 513 flows through the valves 116 and 113 to the upper portion of the storage tank 602. The air flowing into the greenhouse 400 after passing through the second heat exchange coil 513 has a low temperature as well as a humidity. When the temperature in the greenhouse 400 is lowered below a set value, the first pump 301 ) To supply hot water of the upper part of the waste heat tank 601 to the first heat exchange coil 512 through the first three-way valve 201. The air inside the greenhouse 400 passing through the first heat exchange coil 512 by the fan 511 increases in temperature to increase the temperature inside the greenhouse 400, and the temperature decreases through the first heat exchange coil 512. Hot water flows into the waste heat tank 601 through the valve 102.

In addition, the heat exchange unit 510 is configured with an ultraviolet sterilizer 515, by sterilizing the air circulated in the greenhouse 400 can prevent the spread of pests that are likely to occur during the internal air circulation.

② Winter greenhouse heating and dehumidification

In winter, hot water is stored in the storage tank 602, and the temperature of the hot water located above the storage tank 602 is higher than that of the lower hot water. Cold water is stored in the waste heat tank 601 and the waste heat tank 601 below. The temperature of the cold water located is lower than the cold water at the top. When the third pump 303 is operated to heat the greenhouse 400, the hot water in the upper portion of the storage tank 602 is supplied to the second heat exchange coil 513 through the third three-way valve 203 and the greenhouse 400. The air inside is heated while passing through the second heat exchange coil 513 by the fan 511. The air heated while passing through the second heat exchange coil 513 is supplied to the greenhouse 400 again through the duct 514, and the hot water whose temperature has passed through the second heat exchange coil 513 is lowered through the valves 116 and 111. Pass through the storage tank 602 below. If the heating load is large and the greenhouse 400 temperature is not heated above the set value, the valves 115 and 114 are opened to increase the heating capacity by circulating the hot water in the first heat exchange coil 512. 101 and 102 are closed to block the inflow of hot water into the waste heat tank (601).

When the humidity in the greenhouse 400 is lowered, when the first pump 301 is operated, cold water below the waste heat tank 601 is supplied to the first heat exchange coil 512 through the first three-way valve 201 and the greenhouse Air inside the 400 passes through the first heat exchange coil 512 by the fan 511. At this time, since the temperature of the first heat exchange coil 512 is lower than that of air, water vapor in the air condenses to form condensation water, and the air passing through the first heat exchange coil 512 through the duct 514 is lowered in humidity. Cold water, which is supplied to 400 and whose temperature rises after passing through the first heat exchange coil 512, flows into the upper portion of the waste heat tank 601 through the valve 101. The air flowing into the greenhouse 400 after passing through the first heat exchange coil 512 is lowered not only in humidity but also in temperature. As a result, when the temperature in the greenhouse 400 is lower than the set value, the third pump 303 The hot water is supplied to the second heat exchange coil 513 through the third three-way valve 203 by operating. The air inside the greenhouse 400 passing through the second heat exchange coil 513 by the fan 511 is heated to increase the temperature inside the greenhouse 400, and the hot water having the temperature lowered past the second heat exchange coil 513 is Passes through the valves 116 and 111 to the bottom of the storage tank 602.

③ Cold storage operation using summer air and geothermal

Cold water is produced by using the air and geothermal heat and operating the heat pump 604. When the fifth pump 305 is operated, the cold water in the upper portion of the storage tank 602 is transferred to the geothermal heat exchanger 605 through the valve 109. ) Is supplied to the cold water, and the cold water whose temperature is lowered while passing through the geothermal heat exchanger 605 is introduced into the storage tank 602 through the valve 107. When the cold water of the storage tank 602 cannot be sufficiently cooled by using only the geothermal heat, when the fourth pump 304 is operated, the cold water passing through the geothermal heat exchanger 605 and passing through the valve passes through the fourth three-way valve 204. Passed through the heat pump 604. At this time, the second pump 302 is operated to flow into the heat pump 604 through the second three-way valve 202, the storage water of the waste heat tank 601. The temperature of the cold water at the storage tank 602 is lowered while passing through the heat pump 604 to flow into the lower portion of the storage tank 602 through the valve 110 and the temperature of the stored water at the waste heat tank 601 is increased. It rises and enters the waste heat tank 601 through the valve 104. In addition, when the heat transmitted from the heat pump 604 to the waste heat tank 601 is excessive, the valve 103 is opened to circulate the hot water of the waste heat tank 601 to the cooling tower 603 and to release heat to the atmosphere. Lowering the temperature of 601, and improves the thermal efficiency of the heat pump 604 can be continuously produced cold water.

That is, in lowering the cold water temperature of the storage tank 602, only ⓐ geothermal heat is used, or ⓑ heat pump 604, ⓒ heat pump 604, cooling tower 603, ⓓ heat pump 604 and geothermal heat depending on the situation. Or ⓔ heat pump 604 and geothermal and cooling tower 603 may be used simultaneously.

④ Regenerative operation using waste heat and geothermal heat in winter greenhouse

In the case of using waste heat and geothermal heat discarded from the greenhouse 400 and operating the heat pump 604 to produce hot water, when the fourth pump 304 is operated, the hot water under the storage tank 602 is the fourth three-way valve. Passed through the (204) to the heat pump (604). At this time, the second pump 302 is operated to flow into the heat pump 604 through the second three-way valve 202, the storage water of the waste heat tank 601. As the hot water of the storage tank 602 passes through the heat pump 604, the temperature of the storage tank 602 becomes higher and flows into the upper portion of the storage tank 602 through the valve 112, and the storage water of the waste heat tank 601 further increases in temperature. It is lowered and flows into the waste heat tank 601 through the valve 105. The storage water of the waste heat tank 601 at which the temperature is lowered is used in the first heat exchange coil 512 to lower the temperature of the greenhouse 400 or to remove moisture.

When the temperature of the waste heat tank 601 becomes too low to produce sufficient hot water in the storage tank 602 in the heat pump 604, the fifth pump 305 is operated and the storage water under the waste heat tank 601 is valved. After the geothermal heat exchanger 605 through the 108, the temperature of the stored water is introduced into the waste heat tank 601 through the valve 106. Therefore, continuous hot water production is possible using this as a heat source.

3 is a block diagram of a hybrid heat pump type heat exchange system for a greenhouse according to another embodiment of the present invention, in which a fan coil unit 520 is configured instead of the heat exchange unit 510 to control temperature and humidity of the greenhouse 400. Accordingly, the fan coil unit 520 is connected to the waste heat tank 601 side through the valves 121 and 122, and is connected to the storage tank 602 side through the valves 123 and 124.

Figure 4 is a schematic diagram of a hybrid heat pump type heat exchange system for a greenhouse according to another embodiment of the present invention, by simultaneously configuring the heat exchange unit 510 and the fan coil unit 520 to reduce the temperature and humidity of the greenhouse 400 More effective control is possible, and for this purpose, valves 131, 132, and 133 are configured to circulate hot water and cold water.

The fan coil unit 520 and the heat exchange unit 510 may be used for cooling or dehumidifying the greenhouse 400. In the case of cooling and heating the greenhouse 400 using cold or hot water of the storage tank 602, a valve ( By opening 133, the greenhouse 400 may be cooled or heated through the fan coil unit 520 and the second heat exchange coil 513. In addition, by opening the valves 131 and 132 in a state where the valves 101 and 102 are closed, the first heat exchange coil 512 can be used at the same time, thereby improving air-conditioning and dehumidification performance. In addition, for example, the cold water of the storage tank 602 is supplied to the fan coil unit 520 and the second heat exchange coil 513 in the summer to cool and dehumidify the greenhouse 400, and the hot water of the waste heat tank 601 may be By supplying the first heat exchange coil 512 to heat the greenhouse 400, cooling and heating and dehumidification of the greenhouse 400 can be performed at the same time, thereby enabling faster and more efficient air conditioning and dehumidification.

According to the hybrid heat pump type heat exchange system for a greenhouse of the present invention, it is possible to control the temperature and humidity inside the greenhouse 400 without air flow and the outside of the greenhouse 400, thereby eliminating the need to emit CO 2 into the atmosphere. Therefore, since the consumption of CO2 can be reduced, it is possible to reduce the cost for purchasing CO2 and to prevent environmental pollution that can cause the greenhouse effect. In addition, geothermal heat can be used, heat loss can be reduced, and waste heat can be recycled to significantly increase thermal efficiency, thereby reducing the number of geothermal pores, thereby reducing geothermal hole installation costs and maintenance costs. In addition, by operating the heat exchange unit 510 and the fan coil unit 520 in combination, the upper and lower temperature distribution and the humidity distribution in the greenhouse 400 can be controlled in an optimal state quickly and uniformly, and the air in the greenhouse 400 Sterilization can prevent pests and infectious diseases. In addition, the boiler is unnecessary, so fossil fuels are unnecessary, and thus air pollution can be reduced.

On the other hand, according to the hybrid heat pump type heat exchange system for a greenhouse of the present invention, by configuring a temperature sensor 401, a humidity sensor 402, and a CO2 sensor 403 in the greenhouse 400, temperature, humidity in the greenhouse 400 , And CO2 may be measured and the temperature and humidity in the greenhouse 400 may be automatically controlled according to the set value. The automatic control of temperature and humidity is only well known conventional technique and will be omitted.

On the other hand, according to the greenhouse hybrid heat pump type heat exchange system of the present invention, by precisely controlling the temperature and humidity of the greenhouse 400 by opening and closing the appropriate valve, for example, cold water of the storage tank 602 in the summer When cooling the greenhouse by using, the cold water flowing into the greenhouse side through the third three-way valve 203 is the temperature rises and passes through the valve 113 to the upper portion of the storage tank 602. At this time, when the valve 111 is opened, a portion of the cold water flowing into the upper portion of the storage tank 602 is mixed with the cold water coming out of the lower portion of the storage tank 602 through the valve 111 and flows back into the greenhouse 400. In this way, more precise temperature control is possible by adjusting the degree of opening and closing of the valve, and in the heating and cooling of the greenhouse 400, the storage tank 602 side controls the valves 111 and 113, and the waste heat tank side is a valve. Temperature control as described above is possible by controlling (104, 105).

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Various modifications and variations are possible within the scope of equivalents of the claims to be described.

1 is a block diagram of a greenhouse according to the prior art,

2 is a block diagram of a hybrid heat pump type heat exchange system for a greenhouse according to an embodiment of the present invention;

Figure 3 is a block diagram of a hybrid heat pump type heat exchange system for a greenhouse according to another embodiment of the present invention, and

Figure 4 is a block diagram of a hybrid heat pump type heat exchange system for a greenhouse according to another embodiment of the present invention.

Description of the Related Art [0002]

400: greenhouse 510: heat exchange unit

520: fan coil unit 601: waste heat tank

602: storage tank 603: cooling tower

604: heat pump 605: geothermal heat exchanger

Claims

A first tank for storing hot or cold water;

A second tank for storing hot or cold water;

A geothermal heat exchanger for exchanging hot water or cold water of the first tank and the second tank with geothermal heat;

A heat exchange device for heating or cooling a greenhouse by circulating the hot water or the cold water supplied from the first tank or the second tank;

A heat pump hydrodynamically connected to the first tank and the second tank to direct thermal energy of a low temperature portion to the high temperature portion; And

A cooling tower hydrodynamically connected to the heat pump and the first tank to discharge heat energy of the first tank into the atmosphere

Greenhouse hybrid heat pump type heat exchange system comprising a.

The method of claim 1,

The hot water or the cold water flowing out of the first tank and introduced into the heat exchange device may be selectively mixed with the hot water or cold water flowing out of the heat exchange device and introduced into the first tank,

The hot water or cold water flowing out of the second tank and introduced into the heat exchange device may be selectively mixed with the hot water or cold water flowing out of the heat exchange device and introduced into the second tank. Hybrid heat pump type heat exchange system.

According to claim 2, The heat exchange device,

A heat exchange part hydrodynamically connected to the first tank and the second tank; And

Greenhouse hybrid heat pump type heat exchange system including a stirring fan for supplying the air of the greenhouse to the heat exchange unit.

The method of claim 3,

The hot water or the cold water flowing out of the second tank and introduced into the heat exchange part may be selectively mixed with the hot water or cold water flowing out of the first tank and introduced into the heat exchange part. Pump type heat exchange system.

According to claim 2, The heat exchange device,

A first heat exchange coil hydrodynamically connected to the first tank;

A second heat exchange coil hydrodynamically connected to the second tank; And

A hybrid heat pump type heat exchange system for a greenhouse including a fan for supplying air of the greenhouse to the first heat exchange coil and the second heat exchange coil.

The method of claim 5,

The hot water or cold water flowing out of the second tank and introduced into the second heat exchange coil may be selectively introduced into the first heat exchange coil.

When the hot water or the cold water flows into the first heat exchange coil, the hot water or cold water flowing out of the first heat exchange coil is mixed with the hot water or cold water flowing out of the second heat exchange coil, and the first 1, the tank is a hybrid heat pump type heat exchange system for a greenhouse, characterized in that the fluid flow with the first heat exchange coil is impossible.

The method of claim 2,

The heat exchange apparatus includes a heat exchange unit and a fan coil unit,

The fan coil unit,

A stirring fan for supplying the air of the greenhouse to the heat exchange unit,

The heat exchange unit,

A first heat exchange coil hydrodynamically connected to the first tank;

A second heat exchange coil hydrodynamically connected to the second tank; And

The method of claim 7, wherein

The hot water or cold water flowing out of the second tank and introduced into the second heat exchange coil and the heat exchange part may be selectively introduced into the first heat exchange coil.

When the hot water or the cold water flows into the first heat exchange coil, the hot water or cold water flowing out of the first heat exchange coil is mixed with the hot water or cold water flowing out of the second heat exchange coil and the heat exchange unit. At the same time, the first tank is a hybrid heat pump type heat exchange system for a greenhouse, characterized in that the fluid flow with the first heat exchange coil is impossible.

The heat exchange device according to any one of claims 5 to 8, wherein

And a duct for discharging air of the greenhouse passing through the first heat exchange coil and the second heat exchange coil to the greenhouse.

The method of claim 9, wherein the heat exchanger,

Greenhouse hybrid heat pump type heat exchange system further comprises an ultraviolet sterilizer for sterilizing the air of the greenhouse flowing by the fan.