An absorption heat pump drying system using solar energy storage

Abstract

The utility model discloses a kind of absorption type heat pump drying systems using solar energy storage, mainly by photovoltaic panel, pump, solar energy collector, water storage tank, regulating valve, generator, heat exchanger, absorber condenser, evaporator, drying cabinet, fan composition;The solar energy collector is connected with water storage tank, generator and constitutes solar energy heat source circulation loop by pipeline communication;Generator, condenser, evaporator, absorber, pump are sequentially connected to constitute refrigerant water and lithium bromide circulation pipeline by pipeline connection;Evaporator and waste heat pipeline heat exchange;Condenser, absorber are connected with drying cabinet by hot water pipeline, finally drying raw material;System also includes photovoltaic panel, for the power supply of pump and fan.The utility model makes full use of waste heat and solar energy to dry food raw materials, improve energy utilization, use absorption type heat pump to provide drying heat source, without consuming a large amount of electric energy, while reducing the carbon emission generated by freon, realize energy saving and environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of heat pump drying technology, and in particular to an absorption heat pump drying system that utilizes solar energy storage. Background Technology

[0002] Drying is a crucial step in food raw material storage and production. Common food drying methods in my country include hot air drying, vacuum drying, and freeze drying. Hot air drying is simple to operate and fast, but the high temperature can easily lead to over-drying, affecting the taste. Vacuum drying can dry food at lower temperatures, but the drying time is long and the production efficiency is low. Freeze drying requires freezing the food and then drying it under vacuum conditions, resulting in low production efficiency and high product costs, making it suitable for high-end products. Heat pumps, as an energy-saving and sustainable technology, have advantages such as low energy consumption and good drying effect. Therefore, combining heat pumps with food drying is one of the important development trends in food storage and production.

[0003] Traditional heat pump systems utilize Freon as a refrigerant and electricity as the driving force to heat the terminal components. However, with global warming, the excessive use of Freon as a refrigerant will exacerbate environmental pollution. Currently, heat pump drying technology lacks systematic design, and the system stability of combining heat pump drying with solar energy is low. Furthermore, a large amount of waste heat from food factories is not fully utilized. To improve the quality of dried food, reduce energy consumption, and enhance drying efficiency and energy utilization, this invention proposes an absorption heat pump drying system utilizing solar energy storage. Summary of the Invention

[0004] The purpose of this invention is to improve the quality of dried food, reduce energy consumption, increase drying efficiency and energy utilization, and reduce the environmental pollution caused by refrigerant Freon. It proposes an absorption heat pump drying system utilizing solar energy storage; this system recovers waste heat from food processing plants for drying raw materials, maximizing the recovery of waste heat. Solar energy is used to provide hot water and electricity to the system, converting unstable solar energy into stable heat energy for drying raw materials in the drying chamber, thus improving system stability and reducing energy consumption and carbon emissions. The combination of heat pump drying and hot air drying further enhances drying efficiency.

[0005] This utility model discloses an absorption heat pump drying system utilizing solar energy storage, mainly composed of a solar-driven heat source circulation pipeline, a lithium bromide solution circulation pipeline, a refrigerant water circulation pipeline, a waste hot water pipeline, and hot water and hot air drying pipelines; the solar-driven heat source circulation pipeline consists of a first photovoltaic panel 1, a first photovoltaic controller 2, a centrifugal pump 3, a solar collector 4, a first regulating valve 5, a second regulating valve 6, a first water storage tank 7, a third regulating valve 8, a second water storage tank 9, a fourth regulating valve 10, a fifth regulating valve 11, a first temperature sensor 12, a second temperature sensor 13, and a generator 14; the lithium bromide solution circulation pipeline consists of a generator 14, a sixth regulating valve 17, a heat exchanger 18, a seventh regulating valve 19, a shielded pump 20, a second photovoltaic controller 21, a second photovoltaic panel 22, and an absorber 26. The refrigerant water pipeline consists of generator 14, condenser 15, evaporator 25, and absorber 26; the waste hot water pipeline consists of fourth temperature sensor 23, fifth temperature sensor 24, and evaporator 25; the hot water drying circulation pipeline consists of condenser 15, third temperature sensor 16, absorber 26, sixth temperature sensor 27, drying chamber 28, and water distributor 37; the hot air drying pipeline consists of condenser 15, third temperature sensor 16, absorber 26, sixth temperature sensor 27, drying chamber 28, water distributor 37, seventh temperature sensor 29, first humidity sensor 30, air duct 31, butterfly valve 32, eighth temperature sensor 33, second humidity sensor 34, humidity controller 35, and fan 36. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the structure of the present invention. The components are numbered as follows: 1—First photovoltaic panel, 2—First photovoltaic controller, 3—Centrifugal pump, 4—Solar collector, 5—First regulating valve, 6—Second regulating valve, 7—First water storage tank, 8—Third regulating valve, 9—Second water storage tank, 10—Fourth regulating valve, 11—Fifth regulating valve, 12—First temperature sensor, 13—Second temperature sensor, 14—Generator, 15—Condenser, 16—Third temperature sensor, 17—Sixth regulating valve, 18—Heat exchanger, 19—Seventh regulating valve, 20—Shielded pump, 21—Second photovoltaic controller, 22—Second photovoltaic... Plate, 23—Fourth temperature sensor, 24—Fifth temperature sensor, 25—Evaporator, 26—Absorber, 27—Sixth temperature sensor, 28—Drying oven, 29—Seventh temperature sensor, 30—First humidity sensor, 31—Air duct, 32—Butterfly valve, 33—Eighth temperature sensor, 34—Second humidity sensor, 35—Humidity controller, 36—Fan, 37—Water distributor, 38—Water inlet, 39—Drain outlet, 40—Hot water inlet, 41—Waste heat inlet, 42—Waste heat outlet, 43—First hot water outlet, 44—Air outlet, 45—Air inlet, 46—Second hot water outlet. Detailed Implementation

[0007] like Figure 1 The illustrated absorption heat pump drying system utilizing solar energy storage includes a solar-driven heat source circulation pipeline consisting of a first photovoltaic panel 1, a first photovoltaic controller 2, a centrifugal pump 3, a solar collector 4, a first regulating valve 5, a second regulating valve 6, a first water storage tank 7, a third regulating valve 8, a second water storage tank 9, a fourth regulating valve 10, a fifth regulating valve 11, a first temperature sensor 12, a second temperature sensor 13, and a generator 14; a lithium bromide solution circulation pipeline consisting of a generator 14, a sixth regulating valve 17, a heat exchanger 18, a seventh regulating valve 19, a shielded pump 20, a second photovoltaic controller 21, a second photovoltaic panel 22, and an absorber 26; and a condenser 1. 5. A refrigerant water pipeline consisting of evaporator 25 and absorber 26; a waste hot water pipeline consisting of fourth temperature sensor 23, fifth temperature sensor 24, and evaporator 25; a hot water drying circulation pipeline consisting of condenser 15, third temperature sensor 16, absorber 26, sixth temperature sensor 27, drying chamber 28, and water distributor 37; and a hot air drying pipeline consisting of condenser 15, third temperature sensor 16, absorber 26, sixth temperature sensor 27, drying chamber 28, water distributor 37, seventh temperature sensor 29, first humidity sensor 30, air duct 31, butterfly valve 32, eighth temperature sensor 33, second humidity sensor 34, humidity controller 35, and fan 36.

[0008] Solar-driven heat source circulation pipeline: Water enters the first water storage tank 7 from the water inlet 38, and starts to circulate through the centrifugal pump 3. After being heated to a certain temperature by the solar collector 4, it enters the second water storage tank 9, passes through the third regulating valve 10 and the first temperature sensor 12 to the generator 14. The hot water is used as the driving heat source to heat the solution in the generator. After the driving heat source is cooled, it returns to the first water storage tank 7 through the second temperature sensor 13 and the fifth regulating valve 11.

[0009] It should be noted that the centrifugal pump 3 is connected to the first photovoltaic controller 2 and the first photovoltaic panel 1, and uses solar energy to drive water circulation during use. The first water storage tank 7 is connected to the second regulating valve 6 and the third regulating valve 8. When the hot water temperature needs to be adjusted, the third regulating valve 8 is opened; after the system has been used for a long time, the second regulating valve 6 is opened to drain water, and the first regulating valve 5 is opened to replenish water.

[0010] Lithium bromide solution circulation pipeline: The dilute lithium bromide solution passes through the shielded pump 20, heat exchanger 18, and sixth regulating valve 17, and enters the generator 14 where it is heated by the driven heat source to boil and generate refrigerant vapor. After the dilute solution is concentrated into a concentrated solution, it passes through the seventh regulating valve 19 and heat exchanger 18 for sufficient heat exchange before entering the absorber 26. The concentrated solution absorbs the refrigerant vapor in the evaporator 25 in the absorber 26 and is then diluted into a dilute solution, which continues to circulate in the generator 14.

[0011] It should be noted that the shielded pump 20 is connected to the second photovoltaic controller 21 and the photovoltaic panel 22 respectively, and the shielded pump 20 is started by solar energy to run the lithium bromide solution circulation pipeline.

[0012] Refrigerant water circulation pipeline: After the dilute solution is heated in generator 14, refrigerant vapor is generated. The refrigerant vapor enters condenser 15 and condenses into refrigerant water. The refrigerant water enters evaporator 25 after pressure reduction through U-tube. In the low-pressure environment of evaporator 25, the refrigerant water evaporates and enters absorber 26, where it is absorbed by the concentrated solution.

[0013] Waste hot water pipeline: Waste hot water generated by the food factory enters the evaporator 25 through the waste heat inlet 42. The refrigerant water evaporates and absorbs the heat from the waste hot water. After the waste hot water temperature drops, it returns to the food factory for recycling through the waste heat outlet 41. The inlet and outlet are equipped with a fourth temperature sensor 23 and a fifth temperature sensor 24 for easy detection and adjustment of the hot water temperature.

[0014] Drying circulation pipeline: The drying circulation pipeline is divided into two parts.

[0015] Hot water drying circulation pipeline: Hot water enters the absorber 26 from inlet 40 to absorb the heat released during the dilution of the concentrated solution, and then enters the condenser to absorb the heat from the condensation of the refrigerant vapor. The hot water from the absorption heat pump passes through the third temperature sensor 16 and the water distributor 37 before entering the drying chamber 28. The drying chamber 28 is filled with hot water pipes, and the raw materials are dried by the radiation of the hot water.

[0016] Hot air drying pipeline: Hot water enters the absorber 26 from the inlet 40 to absorb the heat released during the dilution of the concentrated solution, and then enters the condenser to absorb the heat during the condensation of the refrigerant vapor; after passing through the third temperature sensor 16 and the water distributor 37, the hot water surrounds the humidity controller 35 and the second humidity sensor 34 to heat the air. Outdoor fresh air enters from the air inlet 45 under the action of the fan 36, and after passing through the humidity controller 35, the outdoor fresh air is adjusted to the humidity required for the drying of the raw materials. The air with adjusted humidity exchanges heat with the hot water from the water distributor 37, and after the temperature and humidity are detected by the eighth temperature sensor 33 and the second humidity sensor 34, it enters the drying chamber 28 for convective heat and mass transfer. The hot air after exchanging heat with the raw materials passes through the air duct 31 and is discharged at the air outlet 44. The air duct (31) is equipped with the seventh temperature sensor (29) and the first humidity sensor (30).

[0017] It should be noted that after the hot air passes through the seventh temperature sensor 29 and the first humidity sensor 30 to monitor the temperature and humidity, the butterfly valve 32 is opened when the temperature is high, allowing the exhausted hot air to mix with the fresh air and increase the temperature of the outdoor fresh air.

[0018] It should be noted that the first hot water outlet 43 and the second hot water outlet 46 can be connected to the hot water inlet 40 to form a circulation pipeline, thereby reducing the amount of hot water used.

[0019] This invention fully utilizes waste heat from food factories and renewable solar energy to dry food raw materials, improving energy efficiency. An absorption heat pump provides the drying heat source, reducing carbon emissions from Freon and achieving energy conservation and environmental protection. Photovoltaic panels power the entire system, eliminating the need for large amounts of electricity and reducing overall operating costs and energy consumption. Combining heat pump radiation drying with hot air drying further enhances drying efficiency.

[0020] The above description is merely an application example of this utility model and does not limit the patent scope of this utility model. Any equivalent structure made using the content of this specification and drawings, whether directly or indirectly applied in related technical fields, is similarly included within the patent protection scope of this utility model.

Claims

1. An absorption heat pump drying system utilizing solar energy storage, characterized in that, Includes a first photovoltaic panel (1), a first photovoltaic controller (2), a centrifugal pump (3), a solar collector (4), a first regulating valve (5), a second regulating valve (6), a first water storage tank (7), a third regulating valve (8), a second water storage tank (9), a fourth regulating valve (10), a fifth regulating valve (11), a first temperature sensor (12), a second temperature sensor (13), a generator (14), a condenser (15), a third temperature sensor (16), a sixth regulating valve (17), a heat exchanger (18), a seventh regulating valve (19), a shielded pump (20), a second photovoltaic controller (21), a second photovoltaic panel (22), a fourth temperature sensor (23), a second photovoltaic controller (24), a second photovoltaic panel (25), a fourth temperature sensor (26), a third temperature sensor (27), a fourth regulating valve (28), a fifth regulating valve (29), a fifth regulating valve (20), a sixth regulating valve (21), a seventh regulating valve (22), a fifth regulating valve (23), a sixth regulating valve (24), a seventh regulating valve (25), a sixth regulating valve (26), a seventh regulating valve (27), a seventh regulating valve (28), a seventh regulating valve (29), a fifth regulating valve (20), a sixth regulating valve (21), a seventh regulating valve (22), a seventh regulating valve (23), a seventh regulating valve (24), a seventh regulating valve (25), a sixth regulating valve (26), a seventh regulating valve (27), a seventh regulating valve (28), a seventh regulating valve (29), a seventh regulating valve (20), a seventh regulating valve (21), a seventh regulating valve (22), a seventh regulating valve (23), a seventh regulating valve (24), a seventh regulating valve (25), a seventh regulating valve (26), a seventh regulating valve (27), a ninth regulating valve (28), a seventh regulating valve (29), a ninth regulating valve (20), a tenth regulating valve (21), a stern regulating valve (22), a ninth regulating valve (23), a tenth regulating valve (24), a ), Fifth temperature sensor (24), Evaporator (25), Absorber (26), Sixth temperature sensor (27), Drying oven (28), Seventh temperature sensor (29), First humidity sensor (30), Air duct (31), Butterfly valve (32), Eighth temperature sensor (33), Second humidity sensor (34), Humidity controller (35), Fan (36), Water distributor (37); First photovoltaic panel (1), First photovoltaic controller (2), Centrifugal pump (3), Solar collector (4), First regulating valve (5), Second regulating valve (6), First water tank (7), Third regulating valve (8), Second water tank (9), Fourth regulating valve A solar-driven heat source circulation pipeline consisting of valve (10), fifth regulating valve (11), first temperature sensor (12), second temperature sensor (13), and generator (14); a lithium bromide solution circulation pipeline consisting of generator (14), sixth regulating valve (17), heat exchanger (18), seventh regulating valve (19), shielded pump (20), second photovoltaic controller (21), second photovoltaic panel (22), and absorber (26); a refrigerant water circulation pipeline consisting of generator (14), condenser (15), evaporator (25), and absorber (26); and a solar-driven heat source circulation pipeline consisting of fourth temperature sensor (23), fifth temperature sensor (24), and evaporator (25). 5) The hot water pipeline is composed of the condenser (15), the third temperature sensor (16), the absorber (26), the sixth temperature sensor (27), the drying box (28), and the water distributor (37); the hot water drying circulation pipeline is composed of the condenser (15), the third temperature sensor (16), the absorber (26), the sixth temperature sensor (27), the drying box (28), the water distributor (37), the seventh temperature sensor (29), the first humidity sensor (30), the air duct (31), the butterfly valve (32), the eighth temperature sensor (33), the second humidity sensor (34), the humidity controller (35), and the fan (36).

2. The absorption heat pump drying system utilizing solar energy storage according to claim 1, characterized in that: Water in the solar-driven heat source circulation pipeline enters the first water storage tank (7) from the water inlet (38), and starts to circulate through the centrifugal pump (3). After being heated to a certain temperature by the solar collector (4), it enters the second water storage tank (9) and then enters the generator (14). In the generator (14), hot water is used as a dilute solution to drive the heat source to heat. After the heat source is cooled down, it returns to the first water storage tank (7) for recirculation and heating. The pipeline is equipped with a fourth regulating valve (10), a first temperature sensor (12), a second temperature sensor (13), and a fifth regulating valve (11) in sequence. The first water storage tank (7) is equipped with a first regulating valve (5) and a second regulating valve (6).

3. The absorption heat pump drying system utilizing solar energy storage according to claim 1, characterized in that: The lithium bromide solution in the lithium bromide solution circulation pipeline passes through the shielded pump (20), heat exchanger (18), and sixth regulating valve (17) and enters the generator (14). It is heated by the driven heat source to boil and generate refrigerant vapor. After the dilute solution is concentrated into a concentrated solution, it passes through the seventh regulating valve (19) and heat exchanger (18) for sufficient heat exchange and then enters the absorber (26). The concentrated solution absorbs the refrigerant vapor in the evaporator (25) in the absorber (26) and is diluted into a dilute solution, which continues to enter the generator (14) for circulation.

4. The absorption heat pump drying system utilizing solar energy storage according to claim 1, characterized in that: The dilute solution in the refrigerant water circulation pipeline is heated in the generator (14) to generate refrigerant vapor. The refrigerant vapor enters the condenser (15) and is condensed into refrigerant water. The refrigerant water enters the evaporator (25) after the pressure is reduced through the U-tube. In the low-pressure environment of the evaporator (25), the refrigerant water evaporates and the evaporated refrigerant vapor enters the absorber (26).

5. The absorption heat pump drying system utilizing solar energy storage according to claim 1, characterized in that: In the waste hot water pipeline, the waste hot water generated by the food factory enters the evaporator (25) from the waste heat inlet (42). The refrigerant water evaporates and absorbs the heat of the waste hot water. After the temperature of the waste hot water decreases, it returns to the food factory for recycling from the waste heat outlet (41). The inlet and outlet are equipped with a fourth temperature sensor (23) and a fifth temperature sensor (24).

6. The absorption heat pump drying system utilizing solar energy storage according to claim 1, characterized in that: In the hot water drying pipeline, water enters the absorber (26) from the hot water inlet (40) to absorb the heat released during the dilution of the concentrated solution, and then enters the condenser (15) to absorb the heat released during the condensation of the refrigerant vapor. The hot water pipeline from the absorption heat pump is equipped with a third temperature sensor (16). The hot water enters the drying chamber (28) after passing from the condenser (15) to the water distributor (37). The raw materials are dried in the drying chamber (28) by the heat radiation of the hot water.

7. The absorption heat pump drying system utilizing solar energy storage according to claim 1, characterized in that: In the hot air drying pipeline, after the hot water is heated by the heat pump, it passes through the water distributor (37) and surrounds the humidity controller (35) and the second humidity sensor (34) to heat the outdoor fresh air. Under the action of the fan (36), the outdoor fresh air enters from the air inlet (45). After the humidity controller (35) adjusts the outdoor fresh air to the humidity required for drying the raw materials, the air with adjusted humidity exchanges heat with the hot water from the water distributor (37). After the temperature and humidity are detected by the eighth temperature sensor (33) and the second humidity sensor (34), it enters the drying chamber (28) and carries out convective heat and mass transfer with the raw materials. Finally, the hot air is discharged through the air duct (31) and the air outlet (44). The air duct (31) is equipped with the seventh temperature sensor (29) and the first humidity sensor (30).

8. The absorption heat pump drying system utilizing solar energy storage according to claim 1, characterized in that: The centrifugal pump (3) is connected to the first photovoltaic controller (2) and the first photovoltaic panel (1), and the centrifugal pump (3) is driven by solar energy during use.

9. The absorption heat pump drying system utilizing solar energy storage according to claim 1, characterized in that: The first water storage tank (7) is connected to the second regulating valve (6) and the third regulating valve (8). When the hot water temperature needs to be adjusted, the third regulating valve (8) is opened. After the system has been used for a long time, the second regulating valve (6) is opened to drain water and the first regulating valve (5) is opened to replenish water.

10. The absorption heat pump drying system utilizing solar energy storage according to claim 1, characterized in that: The shielded pump (20) is connected to the second photovoltaic controller (21) and the photovoltaic panel (22) respectively. After the hot air passes through the seventh temperature sensor (29) and the first humidity sensor (30) to monitor the temperature and humidity, the butterfly valve (32) is opened when the temperature of the hot air is high, so that the discharged hot air mixes with the fresh air and increases the temperature of the outdoor fresh air. The first hot water outlet (43) and the second hot water outlet (46) are connected to the hot water inlet (40) to form a circulation pipeline.

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