Cooling and heating system and operation method

Abstract

To provide a cold heat system that can generate cold water and warm water in a carbon neutral state in a meat processing plant.SOLUTION: A cold heat system 1 includes: heat pumps 10, 20 capable of extracting cold heat and hot heat; warm water routes 30, 31 for supplying a first medium heated by hot heat extracted from the heat pumps to a warm water tank 40; and cold water routes 32, 33 for cooling the internal water of a cold water tank 50 using a second medium cooled by cold heat extracted from the heat pumps.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a cooling and heating system and an operation method.

Background Art

[0002] Conventionally, in meat processing factories such as chicken processing factories, there is a large demand for cooling and heating, and a large amount of energy is input for the generation of cooling and heating.

[0003] Cooling is used, for example, for cooling carcasses, freezing raw meat, air conditioning in live bird houses, etc. Cooling can be obtained by generating chilled water using a refrigerator (for example, Patent Document 1 below).

[0004] Heating is used, for example, for heating warm water for plucking live birds, washing after eviscerating carcasses, and warm water washing in the factory. Heating can be obtained by generating warm water using fossil fuels with a boiler or the like.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, when generating warm water using fossil fuels with a boiler or the like, CO2 and combustion heat are emitted. Therefore, it contributes to environmental degradation on a global scale.

[0007] The present invention has been invented to solve the above problems, and an object thereof is to provide a cooling and heating system that can generate carbon-neutral chilled water and warm water in a meat processing factory.

Means for Solving the Problems

[0008] The heat and cold system according to the present invention for achieving the above object is capable of simultaneously extracting heat and cold comprising a water heat source heat pump and a water-air heat source heat pump a heat pump, a hot water path for supplying a first medium heated by the heat extracted from the heat pump to a hot water tank, and a cold water path for cooling the water in the cold water tank by a second medium cooled by the cold extracted from the heat pump a first heat exchanger in which the second medium cooled by the cold heat taken out from the water heat source heat pump exchanges heat with water circulating in a circulation path connected to the cold water tank; a second heat exchanger in which the second medium cooled by the cold heat taken out from the water-air heat source heat pump exchanges heat with the outside air; a third heat exchanger in which the second medium cooled by the cold heat taken out from the water-air heat source heat pump exchanges heat with cooling water heated by the waste heat of the refrigerator and has.

Advantages of the Invention

[0009] According to the heat and cold system configured as described above, a first medium heated by the heat extracted from the heat pump is supplied to the hot water tank to generate hot water, and the water in the cold water tank is cooled by a second medium cooled by the cold extracted from the heat pump to generate cold water. Therefore, by electrifying fossil fuels and using renewable energy (for example, solar power generation), hot water can be generated. From the above, in a meat processing factory, it is possible to generate carbon-neutral cold water and hot water.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Mode for Carrying Out the Invention

[0011] Embodiments of the present invention will be described with reference to FIG. 1. In the description of the drawings, the same elements are denoted by the same reference numerals, and duplicate descriptions are omitted. The dimensional ratios in the drawings are exaggerated for convenience of explanation and may be different from the actual ratios.

[0012] FIG. 1 is a system diagram showing the heat and cold system 1 according to the present embodiment. The heat and cold system 1 according to the present embodiment will be described as being arranged in a chicken processing factory as an example.

[0013] As shown in FIG. 1, the heat and cold system 1 includes a water heat source heat pump (equivalent to a heat pump) 10, a water-air heat source heat pump (equivalent to a heat pump) 20, a first hot water path (equivalent to a hot water path) 30 through which a first medium heated by the heat taken out from the water heat source heat pump 10 flows, a second hot water path (equivalent to a hot water path) 31 through which a first medium heated by the heat taken out from the water-air heat source heat pump 20 flows, a first cold water path (equivalent to a cold water path) 32 through which a second medium cooled by the cold taken out from the water heat source heat pump 10 circulates, a second cold water path (equivalent to a cold water path) 33 through which a second medium cooled by the cold taken out from the water-air heat source heat pump 20 circulates, a hot water tank 40 connected to the first hot water path 30 and the second hot water path 31, a cold water tank 50 in which cold water cooled by receiving the heat and cold of the second medium circulating in the first cold water path 32 is stored, a first heat exchanger 60 disposed between the water heat source heat pump 10 and the cold water tank 50, a second heat exchanger 61 that exchanges heat between the second medium circulating in the second cold water path 33 and the outside air, and a third heat exchanger 62 that exchanges heat between the second medium circulating in the second cold water path 33 and the cooling water heated by the waste heat of the refrigerator 70.

[0014] The water heat source heat pump 10 is configured to be able to simultaneously extract heat and cold by using the heat energy of the supply water. Although not shown, the water heat source heat pump 10 includes a refrigerant flow path through which a refrigerant circulates, a compressor that compresses the refrigerant, an expansion valve that expands the refrigerant, a hot water heat exchanger that supplies heat to the first medium circulating in the first hot water path 30, and a cold water heat exchanger that supplies cold to the second medium circulating in the first cold water path 32.

[0015] As the water heat source heat pump 10, for example, the water heat source eco-cute uni WW manufactured by the former Kawakami Seisakusho Co., Ltd. can be used. The water heat source heat pump 10 is operated by electricity.

[0016] The water-air source heat pump 20 is configured to be able to simultaneously extract cooling and heating by utilizing the thermal energy of water and air. The water-air source heat pump 20 further has an air heat exchanger that cools the air taken in from the outside with respect to the configuration of the water source heat pump 10 described above.

[0017] As the water-air source heat pump 20, for example, the air-water dual-source Eco-Cute Uni AWW manufactured by Meiki Co., Ltd. can be used. The water-air source heat pump 20 is operated by electricity.

[0018] In the first hot water path 30, a first medium heated by the heat taken out from the water source heat pump 10 moves inside. The first medium is water. The first hot water path 30 is connected to the hot water tank 40, and the heated first medium is stored in the hot water tank 40. The circulation of the first medium in the first hot water path 30 is performed by a pump.

[0019] In the second hot water path 31, a first medium heated by the heat taken out from the water-air source heat pump 20 moves inside. The second hot water path 31 is connected to the hot water tank 40, and the heated first medium is stored in the hot water tank 40. The circulation of the first medium in the second hot water path 31 is performed by a pump.

[0020] In the first cold water path 32, a second medium cooled by the cold heat taken out from the water source heat pump 10 moves inside. The second medium is water. The second medium circulating in the first cold water path 32 exchanges heat with the water circulating in the circulation path 51 connected to the cold water tank 50 in the first heat exchanger 60. The circulation of the second medium in the first cold water path 32 is performed by a pump.

[0021] In the second cold water path 33, a second medium that is cooled by the cold heat taken out from the water-air heat source heat pump 20 moves inside. The second medium circulating in the second cold water path 33 is first heat-exchanged with the outside air in the second heat exchanger 61, and then heat-exchanged with the cooling water heated by the waste heat of the refrigerator 70 in the third heat exchanger 62. The circulation of the second medium in the second cold water path 33 is performed by a pump.

[0022] The hot water tank 40 is supplied with a first medium (water) that is heated by the warm heat taken out from the water heat source heat pump 10 and the water-air heat source heat pump 20. The temperature of the hot water in the hot water tank 40 is, for example, 80°C.

[0023] As shown in FIG. 1, the hot water in the hot water tank 40 is supplied to the scalding machine 90, the washbasin 91, etc. In the scalding machine 90, the carcass is immersed in hot water to remove the hair of the carcass. The temperature of the hot water in the scalding machine 90 is, for example, 60°C. Also, the temperature of the hot water in the washbasin 91 is, for example, 40°C.

[0024] Fresh water is supplied into the cold water tank 50. The water in the cold water tank 50 circulates through the circulation path 51 and is cooled by heat-exchanging with a second medium cooled by the cold heat taken out from the water heat source heat pump 10 in the first heat exchanger 60. The temperature of the cold water in the cold water tank 50 is, for example, 3°C.

[0025] The cold water in the cold water tank 50 is supplied to the water tank 80 for cooling the carcass.

[0026] The refrigerator 70 cools the fresh water supplied to the refrigerator 70 to, for example, 2°C. The fresh water cooled to 2°C by the refrigerator 70 is supplied to the water tank 80. The temperature of the cold water in the water tank 80 is, for example, 2 - 3°C.

[0027] In the first heat exchanger 60, heat exchange is performed between the second medium circulating through the first cold water path 32 and the water circulating through the circulation path 51. As a result, the water circulating through the circulation path 51 receives cold heat from the second medium circulating through the first cold water path 32 and is cooled. On the other hand, the second medium circulating through the first cold water path 32 receives warm heat from the water circulating through the circulation path 51 and is heated.

[0028] In the second heat exchanger 61, heat exchange is performed between the second medium circulating through the second cold water path 33 and the outside air taken in. As a result, the outside air taken in receives cold heat from the second medium circulating through the second cold water path 33 and is cooled. The outside air cooled by receiving cold heat from the second medium is used for cooling the live bird home 81. On the other hand, the second medium circulating through the second cold water path 33 receives warm heat from the outside air taken in and is heated.

[0029] In the third heat exchanger 62, heat exchange is performed between the second medium circulating through the second cold water path 33 and the cooling water heated by the waste heat from the refrigerator 70. The cooling water circulates through a circulation path 64 connecting the refrigerator 70 and the third heat exchanger 62. As a result, the cooling water heated by the waste heat from the refrigerator 70 receives cold heat from the second medium circulating through the second cold water path 33 and is cooled. The cooling water cooled by receiving cold heat from the second medium is supplied again to the refrigerator 70 as cooling water. On the other hand, the second medium circulating through the second cold water path 33 receives warm heat from the cooling water and is heated.

[0030] As shown in FIG. 1, a bypass path 65 is connected to the circulation path 64. The cooling water heated by the waste heat from the refrigerator 70 may move through the bypass path 65, be cooled in the cooling tower 71, and then be supplied again to the refrigerator 70 as cooling water.

[0031] Next, with reference to FIG. 2, the operation method of the cold heat system 1 during daytime operation (when the factory is operating) will be described. In FIG. 2, the operating system is shown by a solid line, and the non-operating system is shown by a dotted line.

[0032] During daytime operation, the water heat source heat pump 10 is driven to simultaneously extract cold heat and warm heat from the water heat source heat pump 10. Also, the water-air heat source heat pump 20 uses only water as a heat source to simultaneously extract cold heat and warm heat.

[0033] The first medium heated by the warm heat extracted from the water heat source heat pump 10 is stored in the hot water tank 40. Also, the first medium heated by the warm heat extracted from the water-air heat source heat pump 20 is also stored in the hot water tank 40. The hot water in the hot water tank 40 is supplied to the boiler 90 and the washbasin 91.

[0034] The second medium cooled by the cold heat extracted from the water heat source heat pump 10 exchanges heat with the water circulating in the circulation path 51 connected to the cold water tank 50 in the first heat exchanger 60. The cold water in the cold water tank 50 is supplied to the water tank 80.

[0035] The second medium cooled by the cold heat extracted from the water-air heat source heat pump 20 exchanges heat with the outside air in the second heat exchanger 61 and exchanges heat with the cooling water heated by the waste heat of the refrigerator 70 in the third heat exchanger 62.

[0036] Here, for example, if the electric energy supplied to the water heat source heat pump 10 is 1 and the heat energy recovered from the water circulating in the circulation path 51 in the first heat exchanger 60 is 3, the heat energy given to the first medium supplied to the hot water tank 40 is 4 (= 1 + 3). That is, the warm heat of the water circulating in the circulation path 51 is used for heating the hot water supplied to the hot water tank 40.

[0037] Further, for example, assuming that the electrical energy supplied to the water-air heat pump 20 is 1, the thermal energy recovered from the outside air in the second heat exchanger 61 is 2, and the thermal energy recovered from the cooling water in the third heat exchanger 62 is 1, the thermal energy given to the first medium supplied to the hot water tank 40 is 4 (= 1 + 2 + 1). That is, the heat of the outside air and the waste heat of the refrigerator 70 are used for heating the hot water supplied to the hot water tank 40.

[0038] Next, with reference to FIG. 3, the operation method of the cooling heat system 1 during night operation (when the factory is stopped) will be described. In FIG. 3, the operating system is indicated by a solid line, and the non-operating system is indicated by a dotted line.

[0039] During night operation, the water heat pump 10 is driven to simultaneously extract cooling heat and heating heat from the water heat pump 10. Further, the water-air heat pump 20 uses only air as a heat source to extract heating heat.

[0040] The first medium heated by the heating heat extracted from the water heat pump 10 is stored in the hot water tank 40.

[0041] The second medium cooled by the cooling heat extracted from the water heat pump 10 is heat-exchanged with the water circulating in the circulation path 51 connected to the cold water tank 50 in the first heat exchanger 60.

[0042] In the water-air heat pump 20, the first medium is heated using the heating heat collected from the outside air to generate hot water, and the generated hot water is supplied to and stored in the hot water tank 40.

[0043] Here, for example, assuming that the electrical energy supplied to the water heat pump 10 is 1 and the thermal energy recovered from the water circulating in the circulation path 51 in the first heat exchanger 60 is 3, the thermal energy given to the first medium supplied to the hot water tank 40 is 4 (= 1 + 3). That is, the heat of the water circulating in the circulation path 51 is used for heating the hot water supplied to the hot water tank 40.

[0044] Also, for example, assuming that the electrical energy supplied to the water-air heat pump 20 is 1 and the thermal energy collected from the outside air is 3, the thermal energy given to the first medium supplied to the hot water tank 40 is 4 (= 1 + 3). That is, the heat of the outside air is utilized for heating the hot water supplied to the hot water tank 40.

[0045] Here, in the case of a conventional factory, hot water was generated using a boiler or the like, discharging CO2 and combustion heat by using fossil fuels. On the other hand, cold water was generated using a refrigerator, and the condensation heat was discharged without being reused. For this reason, in a conventional factory, consumption of fossil fuels and electricity was high, and running costs were high.

[0046] In contrast, according to the cooling and heating system 1 according to the present embodiment, there is no combustion process of a boiler, and hot water can be generated without discharging CO2. For this reason, a carbon-neutral factory can be installed.

[0047] Also, according to the cooling and heating system 1 according to the present embodiment, at night when cold water and hot water are not operating, cold water can be stored in the cold water tank 50 and hot water can be stored in the hot water tank 40 by using the water heat pump 10. Furthermore, at night, by using the water-air heat pump 20, heat can be collected from the outside air and the shortage of hot water can be stored in the hot water tank 40. For this reason, cold water and hot water can be generated in a well-balanced manner.

[0048] As described above, the heat and cold system 1 according to the present embodiment includes heat pumps 10 and 20 capable of simultaneously extracting heat and cold, hot water paths 30 and 31 that supply a first medium heated by the heat extracted from the heat pumps 10 and 20 to a hot water tank 40, and cold water paths 32 and 33 that cool the water in a cold water tank 50 by a second medium cooled by the cold extracted from the heat pumps 10 and 20. According to the heat and cold system 1 configured in this way, the first medium heated by the heat extracted from the heat pumps 10 and 20 is supplied to the hot water tank 40 to generate hot water, and the water in the cold water tank 50 is cooled by the second medium cooled by the cold extracted from the heat pumps 10 and 20 to generate cold water. Therefore, by electrifying fossil fuels and using renewable energy (for example, solar power generation), hot water can be generated. From the above, in a meat processing factory, it is possible to produce carbon-neutral cold water and hot water.

[0049] Further, the heat pumps 10 and 20 include a water heat source heat pump 10 and a water-air heat source heat pump 20. According to the heat and cold system 1 configured in this way, by using the water-air heat source heat pump 20, it is possible to generate hot water by utilizing the heat of the outside air.

[0050] Further, the heat and cold system 1 includes a first heat exchanger 60 in which the second medium cooled by the cold extracted from the water heat source heat pump 10 exchanges heat with water circulating in a circulation path 51 connected to the cold water tank 50, a second heat exchanger 61 in which the second medium cooled by the cold extracted from the water-air heat source heat pump 20 exchanges heat with the outside air, and a third heat exchanger 62 in which the second medium cooled by the cold extracted from the water-air heat source heat pump 20 exchanges heat with cooling water heated by the waste heat of a refrigerator 70. According to the heat and cold system 1 configured in this way, it is possible to generate a desired amount of hot water in the heat pumps 10 and 20 by using the heat exchanged in the first heat exchanger 60, the second heat exchanger 61, and the third heat exchanger 62.

[0051] In addition, the cold water in the cold water tank 50 is supplied to the water tank 80 for cooling the carcass, the outside air cooled by the cold heat taken out from the water-air source heat pump 20 is used for cooling the live bird home 81, and the cooling water of the refrigerator 70 cooled by the cold heat taken out from the water-air source heat pump 20 is supplied to the refrigerator 70 again. According to the cold heat system 1 configured in this way, the cold heat obtained in the heat pumps 10 and 20 can be suitably used.

[0052] Moreover, it is a method of operating the cold heat system 1 according to the present embodiment. At night when the factory stops, the water in the cold water tank 50 is cooled using a second medium cooled by the cold heat taken out from the water heat source heat pump 10, and the first medium heated by the warm heat taken out from the water heat source heat pump 10 is supplied to the hot water tank 40. Using the water-air source heat pump 20, hot water is generated using the warm heat collected from the outside air and supplied to the hot water tank 40. According to this operation method, cold water and hot water can be generated in a well-balanced manner.

[0053] Note that the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims.

[0054] For example, in the above-described embodiment, the cold heat system 1 is applied to a chicken processing factory, but it can also be applied to a processing factory for pigs or the like.

[0055] Also, in the above-described embodiment, the heat pump has the water heat source heat pump 10 and the water-air source heat pump 20, but either one of them may be sufficient.

[0056] Also, in the above-described embodiment, the cold water in the cold water tank 50 is supplied to the water tank 80 for cooling the carcass, and the hot water in the hot water tank 40 is supplied to the scolder 90 and the washroom 91, but the supply destinations are not limited to these.

Explanation of Signs

[0057] 1 Cold heat system 10 Water heat source heat pump (heat pump), 20 Water-air heat source heat pump (heat pump), 30 First hot water path (hot water path), 31 Second hot water path (hot water path), 32 First cold water path (cold water path), 33 Second cold water path (cold water path), 40 Hot water tank, 50 Cold water tank, 51 Circulation path, 60 First heat exchanger, 61 Second heat exchanger, 62 Third heat exchanger, 64 Circulation path, 65 Bypass path, 70 Refrigerator, 71 Cooling tower 80 Water tank, 81 Wild bird home, 90 Scolder, 91 Washbasin.

Claims

1. A heat pump system capable of simultaneously extracting cold and hot water, comprising a heat pump equipped with a water source heat pump and a water-air source heat pump, A hot water path for supplying a first medium heated by the hot water extracted from the heat pump to a hot water tank, A cold water path for cooling the water in the cold water tank by a second medium cooled by the cold water extracted from the heat pump, A first heat exchanger in which the second medium cooled by the cold water extracted from the water source heat pump exchanges heat with water circulating in a circulation path connected to the cold water tank, A second heat exchanger in which the second medium cooled by the cold water extracted from the water-air source heat pump exchanges heat with the outside air, A third heat exchanger in which the second medium cooled by the cold water extracted from the water-air source heat pump exchanges heat with cooling water heated by the waste heat of the refrigerator, a cold heat system.

2. The cold water in the cold water tank is supplied to a water tank for cooling the carcass, The outside air cooled by the cold water extracted from the water-air source heat pump is used for cooling the live bird home, The cooling water of the refrigerator cooled by the cold water extracted from the water-air source heat pump is supplied back to the refrigerator again. The cold heat system according to claim 1.

3. An operation method of the cold heat system according to claim 2, At night when the factory stops, While cooling the water in the cold water tank using the second medium cooled by the cold water extracted from the water source heat pump, supplying the first medium heated by the hot water extracted from the water source heat pump to the hot water tank, An operation method of generating hot water using the heat collected from the outside air using the water-air source heat pump and supplying it to the hot water tank.

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