Air dehumidification direct evaporation water chilling unit utilizing solar energy for regeneration

Abstract

According to the air dehumidification direct evaporation water chilling unit regenerated through solar energy, a solar energy and heat storage part and a solution dehumidification part are connected through a solution pipeline to form a closed loop, and the solution dehumidification part is connected with a direct evaporation cooling water chilling part through an air pipeline. The direct evaporative cooling cold water part and the end user part are connected through a water pipeline to form a closed loop; the device has the advantages that solar energy and heat energy stored in the heat storage water tank are used for heating a dilute solution to achieve concentration and regeneration of the solution, the regenerated solution dehumidifies air and then enters the direct evaporative cooling cold water part, cold water is cooled through direct evaporation of water, and therefore low-temperature cold water is provided for a user; according to the utility model, only solar energy and a small amount of electric energy are used as energy sources to realize refrigeration and cold water preparation, so that the device can be used in different seasons and different weather conditions all the year round, is remarkable in energy conservation and has very strong practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of energy-saving direct evaporative cooling, in particular to an air dehumidification direct evaporative chiller unit utilizing solar energy regeneration. Background Art

[0002] my country has a vast territory, and the climate in different regions varies greatly. Compared with the hot and humid climate in the coastal areas in summer, the hot and dry areas in the northwest in summer can make full use of direct evaporation technology to provide cold air. However, in the hot and humid climate conditions in the coastal areas in summer, when the wet bulb temperature of the incoming air is higher than the setting required for air supply, the use of direct evaporation technology is useless.

[0003] On the other hand, even in the high-humidity areas in the south, there are large differences in relative humidity in different seasons, and the relative humidity often changes greatly within a day. Therefore, it is necessary to adopt targeted technical means to achieve air dehumidification and then use direct evaporative cooling to achieve cooling of tall factories or industrial buildings.

[0004] At the same time, due to different application scenarios, some application scenarios require direct use of cold air cooling, while some application scenarios are partially suitable for cold water cooling, and the requirements are different.

[0005] Therefore, in the hot and humid climate conditions of the southern coastal areas in summer, the condensation heat of the mechanical refrigeration system can be used as the driving heat source for the regeneration of the solution, and the solution can be cooled by refrigeration. After the solution is dehumidified, evaporative cooling is used for refrigeration. However, the device actually uses mechanical refrigeration for refrigeration, but the efficiency is slightly higher, the size is larger, and the initial investment is high, which is not conducive to promotion and application.

[0006] At present, the air conditioning technology of evaporative cooling to produce cold air has been widely used in the low-humidity environment of the northwest. In the southeastern coastal areas of my country, due to the high relative humidity of the air and the restrictions of outdoor meteorological conditions, it is not easy to achieve stable working conditions by simply using evaporative cooling, and new technologies are urgently needed to expand the use of natural energy. Utility Model Content

[0007] The utility model aims to provide an air dehumidification direct evaporation chiller unit utilizing solar energy regeneration to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above purpose, the utility model provides the following technical solution: an air dehumidification direct evaporation chiller using solar energy regeneration, the technical points of which are:

[0009] The air dehumidification direct evaporation chiller includes, from left to right, a solar energy and heat storage part, a solution dehumidification part, a direct evaporation cooling chilled water part and an end user part;

[0010] A solar collector is arranged on the top of the solar energy and heat storage part, a solution heat exchanger is arranged in the middle, and a hot water storage tank is arranged on one side of the solution heat exchanger;

[0011] The solution dehumidification part is provided with a regeneration core and a dehumidification core, a concentrated solution tank is provided below the regeneration core, and a dilute solution tank is provided below the dehumidification core;

[0012] An evaporative cooling filler is arranged in the direct evaporative cooling cold water part, and a solution precooling heat exchanger is arranged above the evaporative cooling filler.

[0013] Preferably, one end of the solar collector is connected to a solar heat collection water inlet pipe, and the other end is connected to a solar heat collection water outlet pipe. The other end of the solar heat collection water inlet pipe is connected to a solar heat collection circulation pump arranged in a hot water storage tank. One end of the solar heat collection water outlet pipe is connected to a solution heat exchanger, and one end of the solution heat exchanger is connected to a regeneration spray row arranged above the regeneration core through a solution regeneration pipeline.

[0014] Preferably, a fresh air inlet, a solution regeneration exhaust outlet and a solution dehumidification outlet are arranged above the solution dehumidification part, and a fresh air fan is arranged below the fresh air inlet.

[0015] Preferably, a solution regeneration fan is provided above the regeneration spray row in the solution dehumidification part, and the solution regeneration exhaust port is located above the solution regeneration fan; the fresh air inlet is located above the dehumidification core.

[0016] Preferably, the concentrated solution tank is connected to the dilute solution tank via a plurality of solution orifice plates, and water exchange is automatically performed using the concentration difference and liquid level difference of the solutions, and water enters the concentrated solution tank from the dilute solution tank.

[0017] Preferably, a direct evaporative spray row, a solution precooling heat exchanger, a direct evaporative fan and a direct evaporative exhaust port are sequentially arranged above the evaporative cooling filler in the direct evaporative cooling cold water part, and an air precooling heat exchanger is arranged below the evaporative cooling filler. One end of the direct evaporative spray row is connected to the end user part through a cold water return pipeline, and the other end of the direct evaporative spray row is connected to the air precooling heat exchanger through a water outlet pipe of the air precooling heat exchanger.

[0018] Preferably, an air inlet bypass port is provided on one side of the direct evaporative cooling cold water part, and an air inlet bypass valve is provided on the air inlet bypass port.

[0019] Compared with the prior art, the utility model has the following beneficial effects: the air dehumidification direct evaporation chiller utilizing solar energy regeneration can still utilize solar energy heat collection and heat storage to obtain dry air energy by means of solution dehumidification in a high humidity environment, and produce cold water by direct evaporation cooling technology to provide cold water for tall factories or industrial buildings. In a dry environment where dehumidification is not required, the air inlet bypass valve can be directly opened, which is equivalent to the independent operation of the direct evaporation chiller. Compared with the existing evaporative cooling technology, the utility model can be used under different meteorological conditions, and even in humid areas of my country, it can solve the problem of short application time of indirect evaporation, that is, only solar energy and a small amount of electricity are needed to achieve refrigeration, and cold water can be provided, which saves energy significantly and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a preferred embodiment of the utility model.

[0021] In the figure: 1, solar energy and heat storage part, 2, solution dehumidification part, 3, direct evaporative cooling cold water part, 4, end user part, 5, solar collector, 6, solar collector water inlet pipe, 7, solar collector water outlet pipe, 8, solution regeneration pipeline, 9, solution heat exchanger, 10, hot water storage tank, 11, solar collector circulation pump, 12, first water replenishment solenoid valve, 13, solution regeneration exhaust port, 14, solution regeneration fan, 15, fresh air inlet, 16, regeneration spray row, 17, regeneration core, 18, fresh air fan, 19, concentrated solution tank, 20, solution orifice plate, 21, solution regeneration pump, 22, air inlet bypass port, 23, air inlet bypass valve, 24, solution Dehumidification air outlet, 25. Solution dehumidification air outlet pipeline, 26. Dehumidification spray row, 27. Dehumidification core, 28. Dilute solution tank, 29. Solution dehumidification pipeline, 30. Solution dehumidification pump, 31. Direct evaporation air inlet pipeline, 32. Direct evaporation air outlet, 33. Direct evaporation fan, 34. Solution precooling heat exchanger, 35. Direct evaporation spray row, 36. Direct evaporation spray bypass solenoid valve, 37 Cold water return pipe, 38. Evaporative cooling filler, 39. Air precooling heat exchanger inlet pipe, 40. Air precooling heat exchanger, 41. Air precooling heat exchanger outlet pipe, 42. Water tank, 43. Second water replenishment solenoid valve, 44. Cold water supply circulation pump, 45. Cold water supply pipeline. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 , the utility model provides a technical solution:

[0024] An air dehumidification direct evaporation chiller utilizing solar energy regeneration, comprising four components: a solar energy and heat storage part 1, a solution dehumidification part 2, a direct evaporation cooling cold water part 3 and an end user part 4. The solar energy and heat storage part 1 comprises a solar energy collector 5, a hot water storage tank 10, a corresponding heat collection circulation pump 11 and a solution heat exchanger 9. The solar energy and heat storage part 1 is provided with a solar energy collector 5 on the top, a solution heat exchanger 9 in the middle, and a hot water storage tank 10 on one side of the solution heat exchanger 9.

[0025] In the present application, the solar energy and heat storage part 1 utilizes the solar collector 5 and the hot water storage tank 10 to store heat. Under the action of the heat collection circulation pump 11, the hot water in the hot water storage tank 10 enters the solar collector 5 through the solar heat collection inlet pipe 6 to absorb solar energy. After the hot water is heated again, it enters the solution heat exchanger 9 through the solar heat collection outlet pipe 7. After the dilute solution is heated, it enters the solution dehumidification part 2 through the future solution regeneration pipeline 8 to realize solution concentration and regeneration.

[0026] The solar energy and heat storage part 1 utilizes the solar energy collector 5 and the heat storage tank to store heat 10, and heats the dilute solution through the heat collection circulation pump 11 and the solution heat exchanger 9 to achieve solution concentration and regeneration, and the regenerated solution enters the concentrated solution tank 19.

[0027] In the present application, the solution dehumidification part 2 includes a fresh air fan 18, a concentrated solution tank 19, a dilute solution tank 28, a regeneration spray row 16, a regeneration core 17, a dehumidification spray row 26, a dehumidification core 27, a solution dehumidification pump 21 and a solution regeneration pump 30. A fresh air inlet 15, a solution regeneration exhaust port 13 and a solution dehumidification outlet 24 are arranged above the solution dehumidification part 2. A fresh air fan 18 is arranged below the fresh air inlet 15. A solution regeneration fan 14 is arranged above the regeneration spray row 16 in the solution dehumidification part 2. The solution regeneration exhaust port 13 is located above the solution regeneration fan 14; the fresh air inlet 15 is located above the dehumidification core 27.

[0028] An air inlet bypass port 22 is provided on one side of the direct evaporative cooling cold water part 3, and an air inlet bypass valve 23 is provided on the air inlet bypass port 22. When the air is dry and does not need dehumidification, the air inlet bypass valve 22 is directly opened, which is equivalent to the independent operation of the direct evaporative chiller.

[0029] In the present application, the direct evaporative cooling cold water part 3 includes a direct evaporative fan 33, a direct evaporative spray row 35, an evaporative cooling filler 38, a water tank 42, an air precooling heat exchanger 40, and a solution precooling heat exchanger 34. The end user part 4 includes a cold water supply circulation pump 44, a cold water supply pipeline 45, a cold water return pipeline 37 and a corresponding bypass solenoid valve. The direct evaporative spray row 35, the solution precooling heat exchanger 34, the direct evaporative fan 33 and the direct evaporative exhaust port 32 are sequentially arranged above the evaporative cooling filler 38 in the direct evaporative cooling cold water part 3, and the air precooling heat exchanger 40 is arranged below the evaporative cooling filler 38. One end of the direct evaporative spray row 35 is connected to the end user part 4 through the cold water return pipe 37, and the other end of the direct evaporative spray row 35 is connected to the air precooling heat exchanger 40 through the air precooling heat exchanger outlet pipe 41.

[0030] The present application protects an air dehumidification direct evaporative cooling water chiller utilizing solar energy regeneration, wherein the solar energy and heat storage part 1 and the solution dehumidification part 2 are connected via a solution pipeline to form a closed loop, the solution dehumidification part 2 is connected to the direct evaporative cooling water chiller 3 via an air pipeline, air enters the solution dehumidification part, is used for solution regeneration and dehumidification respectively, and then enters the direct evaporative cooling water chiller 3, and is finally discharged from the direct evaporative cooling water chiller 3, the direct evaporative cooling water chiller 3 is connected to the end user part 4 via a water pipeline to form a closed loop.

[0031] In the present application, the solution dehumidification section 2 is provided with a solution regenerator and a solution dehumidifier, respectively. The solution regenerator is provided with a regeneration core 17, and the solution dehumidifier is provided with a dehumidification core 27. Under the action of the fan, the air from the middle fresh air inlet 15 is used for solution regeneration and solution dehumidification, respectively. The lower part of the solution regenerator is provided with a concentrated solution tank 19, and the lower part of the solution dehumidifier is provided with a dilute solution 28. The concentrated solution tank 19 and the dilute solution tank 28 are connected through a number of small holes on the solution orifice plate 20 to achieve solution level balance. Below the solution tank, a solution dehumidification pump 30 and a solution regeneration pump 21 are provided. This solution dehumidification section can use the solution to dehumidify the air after the solution is regenerated, and is used for direct evaporation to produce cold water.

[0032] In the present application, the solution dehumidification part 2 and the direct evaporative cooling cold water part 3 are arranged side by side, wherein the low-humidity fresh air generated by the solution dehumidification part 2 directly enters the direct evaporative cooling cold water part 3, and under the action of the direct evaporative fan 33 arranged on the direct evaporative cooling cold water part 3, it passes through the air precooling heat exchanger from the bottom to be precooled with cold water return water, and then enters the evaporative cooling filler 38, exchanges heat and mass with the cold water return water from the direct evaporative spray row 35, and then passes through the solution precooling heat exchanger 34 to cool the dehumidified solution and then be discharged from the exhaust port.

[0033] The direct evaporative cooling cold water part 3 utilizes the evaporative cooling function of water to produce cold water according to the actual usage of the user. The return cold water can be directly evaporated and sprayed or partially pre-cooled through an air pre-cooling heat exchanger to pre-cool the low-humidity air before direct evaporation and spraying.

[0034] In the present application, the solution regeneration core 17, the solution dehumidification core 27, and the evaporative cooling filler 38 can all be made of PVC plates, high-strength anti-corrosion and flame-retardant corrugated cardboard sheets, etc., which are alternately stacked. The plate spacing is designed to be 2.0mm, 3.0mm, 4.0mm, etc., and the plates are alternately stacked to form a cube or a cuboid.

[0035] The working principle of the utility model is:

[0036] Under air dehumidification evaporative cooling conditions:

[0037] Under the action of the fresh air fan 18, the outdoor air enters the solution dehumidification part from the fresh air inlet 15, and then enters the regeneration core 17 to the left, and exchanges heat and mass with the solution from the regeneration spray row 16. After the solution is regenerated and concentrated, it falls into the concentrated solution tank 19. The air after the solution regeneration is discharged from the solution regeneration exhaust port 13 under the action of the solution regeneration fan 14. The outdoor air enters the dehumidification core 27 to the right, and exchanges heat and mass with the concentrated solution from the dehumidification spray row 26. After the air is dehumidified, it enters the direct evaporation cooling cold water part. The dilute solution formed after the solution absorbs moisture is placed in the dilute solution tank 28. Under the action of the solution regeneration pump 21, it enters the solution heat exchanger 9 through the solution regeneration pipeline 8, and is heated by the hot water from the solar collector 5 through the solar collector water inlet pipe 7, and then sprayed and regenerated by the regeneration spray row 16. The concentrated solution in the concentrated solution tank 19 passes through the solution dehumidification pipeline 29 under the action of the solution dehumidification pump 30, enters the solution precooling heat exchanger 34 for cooling, and then is dehumidified by spraying in the wet spray row 26.

[0038] The concentrated solution tank 19 at the bottom of the regeneration core 17 and the dilute solution tank 28 at the bottom of the dehumidifier are connected through a plurality of solution orifice plates 20 , and water is automatically exchanged by utilizing the concentration difference and liquid level difference of the solution, and water enters the concentrated solution tank 19 from the dilute solution tank 28 .

[0039] The low-humidity air generated by the solution dehumidification part directly enters the direct evaporative cooling cold water part 3. Under the action of the direct evaporative fan 33 arranged on the direct evaporative cooling cold water part 3, the air is pre-cooled from the bottom through the air pre-cooling heat exchanger 40 using the cold water return water from the air pre-cooling heat exchanger inlet pipe 39, and enters the evaporative cooling filler 38 to exchange heat and mass with the cold water return water from the cold water return pipe 37 from the direct evaporative spray row 35. After the cold water evaporates, the remaining cold water is cooled, and the high-humidity air passes through the solution pre-cooling heat exchanger 34 again to cool the dehumidified solution and then is discharged from the direct evaporative exhaust port 32.

[0040] When the air inlet temperature is lower than the set value, the direct evaporation spray bypass solenoid valve 36 is opened, and the cold water return directly enters the direct evaporation spray row 35 for spraying. When the air inlet temperature is higher than the set value, the direct evaporation spray bypass solenoid valve 36 is closed, and the cold water return enters the air precooling heat exchanger 40 through the air precooling heat exchanger inlet pipe 39, precools the dry air, and then enters the direct evaporation spray row 35 through the air precooling heat exchanger outlet pipe 41 for spraying.

[0041] The solar energy and heat storage part 1 utilizes the solar energy collector 5 and the heat storage tank 10 to store heat. Under the action of the heat collection circulation pump 11, the hot water in the heat storage tank 10 enters the solar energy collector 5 through the solar energy collection water inlet pipe 6 to absorb solar energy. After the hot water is heated again, it enters the solution heat exchanger 9 through the solar energy collection water outlet pipe 7. After the dilute solution is heated, it enters the solution dehumidification part 2 through the future solution regeneration pipeline 8 to realize solution concentration and regeneration.

[0042] Under direct evaporative cooling conditions:

[0043] When the outdoor air humidity is lower than the set value, it is only necessary to open the air inlet bypass valve 23. Under the action of the direct evaporation fan 33, the outdoor air is directly introduced into the direct evaporation cooling cold water part 3 through the air inlet bypass port 22. The outdoor air passes through the direct evaporation air inlet pipeline 31, passes through the air precooling heat exchanger 40 from the bottom, and uses the cold water return from the air precooling heat exchanger inlet pipe 39 to precool the air, enters the evaporative cooling filler 38, and exchanges heat and mass with the cold water return from the cold water return pipe 37 from the direct evaporation spray row 35. After the cold water evaporates, the remaining cold water is cooled, and the high-humidity air passes through the solution precooling heat exchanger 34 to cool the dehumidification solution and then is discharged from the direct evaporation exhaust port 32.

[0044] When the air inlet temperature is lower than the set value, the direct evaporation spray bypass solenoid valve 36 is opened, and the cold water return directly enters the direct evaporation spray row 35 for spraying. When the air inlet temperature is higher than the set value, the direct evaporation spray bypass solenoid valve 36 is closed, and the cold water return enters the air precooling heat exchanger 40 through the air precooling heat exchanger inlet pipe 39, precools the dry air, and then enters the direct evaporation spray row 35 through the air precooling heat exchanger outlet pipe 41 for spraying.

[0045] In the description of the present invention, it should be understood that the terms "top", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0047] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air dehumidification direct evaporation chiller using solar energy regeneration, characterized in that: The air dehumidification direct evaporation chiller includes, from left to right, a solar energy and heat storage part (1), a solution dehumidification part (2), a direct evaporation cooling cold water part (3) and an end user part (4); A solar collector (5) is arranged at the top of the solar energy and heat storage part (1), a solution heat exchanger (9) is arranged in the middle, and a hot water storage tank (10) is arranged on one side of the solution heat exchanger (9); The solution dehumidification part (2) is provided with a regeneration core (17) and a dehumidification core (27), a concentrated solution tank (19) is provided below the regeneration core (17), and a dilute solution tank (28) is provided below the dehumidification core (27); An evaporative cooling filler (38) is arranged in the direct evaporative cooling cold water part (3), and a solution precooling heat exchanger (34) is arranged above the evaporative cooling filler (38).

2. The air dehumidification direct evaporative chiller utilizing solar energy regeneration according to claim 1, characterized in that: One end of the solar collector (5) is connected to a solar heat collection water inlet pipe (6), and the other end is connected to a solar heat collection water outlet pipe (7). The other end of the solar heat collection water inlet pipe (6) is connected to a solar heat collection circulation pump (11) arranged in a hot water storage tank (10). One end of the solar heat collection water outlet pipe (7) is connected to a solution heat exchanger (9). One end of the solution heat exchanger (9) is connected to a regeneration spray row (16) arranged above a regeneration core (17) through a solution regeneration pipeline (8).

3. The air dehumidification direct evaporation chiller using solar energy regeneration according to claim 1 or 2, characterized in that: A fresh air inlet (15), a solution regeneration outlet (13) and a solution dehumidification outlet (24) are arranged above the solution dehumidification part (2), and a fresh air fan (18) is arranged below the fresh air inlet (15).

4. The air dehumidification direct evaporation chiller utilizing solar energy regeneration according to claim 3, characterized in that: A solution regeneration fan (14) is arranged above the regeneration spray row (16) in the solution dehumidification part (2); the solution regeneration exhaust port (13) is located above the solution regeneration fan (14); and the fresh air inlet (15) is located above the dehumidification core (27).

5. The air dehumidification direct evaporation chiller utilizing solar energy regeneration according to claim 1, characterized in that: The concentrated solution tank (19) and the dilute solution tank (28) are connected via a plurality of solution orifice plates (20), and water exchange is automatically performed using the concentration difference and liquid level difference of the solutions, so that water enters the concentrated solution tank (19) from the dilute solution tank (28).

6. The air dehumidification direct evaporative chiller utilizing solar energy regeneration according to claim 1, characterized in that: A direct evaporation spray row (35), a solution precooling heat exchanger (34), a direct evaporation fan (33) and a direct evaporation exhaust port (32) are sequentially arranged above the evaporation cooling filler (38) in the direct evaporation cooling cold water part (3); an air precooling heat exchanger (40) is arranged below the evaporation cooling filler (38); one end of the direct evaporation spray row (35) is connected to the end user part (4) through a cold water return pipe (37); and the other end of the direct evaporation spray row (35) is connected to the air precooling heat exchanger (40) through a water outlet pipe (41) of the air precooling heat exchanger.

7. The air dehumidification direct evaporation chiller utilizing solar energy regeneration according to claim 3, characterized in that: An air inlet bypass port (22) is provided on one side of the direct evaporative cooling cold water part (3), and an air inlet bypass valve (23) is provided on the air inlet bypass port (22).

Images