Multi-functional energy tower heat pump system

Abstract

The utility model provides a kind of energy tower heat pump technical field, especially relate to a kind of multifunctional energy tower heat pump system, including energy tower circulation subsystem, cold and heat combined heat pump subsystem, dehumidification drainage subsystem, cascade heat pump high temperature hot water vapor subsystem;Energy tower circulation subsystem and cold and heat combined heat pump subsystem synergistic effect can be used for refrigerated water, hot water;Energy tower circulation subsystem, cold and heat combined heat pump subsystem and the synergistic effect of cascade heat pump high temperature hot water vapor subsystem can be used for making higher temperature hot water, steam;Energy tower circulation subsystem, cold and heat combined heat pump subsystem and the synergistic effect of dehumidification drainage subsystem can be used for solution concentration.The utility model energy tower and flowing air contact exist heat mass exchange simultaneously, not only can heat exchange with outside environment, and have the ability to collect cold heat from outside environment, simultaneously, the utility model energy tower also utilizes its mass transfer property, in combination with energy recovery design, develop the evaporation concentration function of using energy tower for different heat-sensitive solution.

Description

Technical Field

[0001] This utility model relates to the field of energy tower heat pump technology, and in particular to a multifunctional energy tower heat pump system. Background Technology

[0002] Low-grade thermal energy refers to thermal energy forms with low temperature, poor energy quality, and high utilization difficulty. This type of thermal energy is typically difficult to convert directly and efficiently into mechanical or electrical energy using conventional equipment due to its low temperature and low energy density. Although low-grade thermal energy is difficult to utilize, it has the advantages of a large total volume and being clean and environmentally friendly. With increasing emphasis on the utilization of low-grade thermal energy and a wider range of needs for energy recovery and reuse, research into developing diversified solutions for utilizing low-grade thermal energy is receiving more attention.

[0003] A conventional energy tower heat pump system consists of an energy tower, a water-to-water heat pump unit, and end-user interfaces for cooling and heating. In winter, an antifreeze refrigerant exchanges heat with the air inside the energy tower, absorbing heat energy from the air. The heat pump unit then upgrades the heat energy for heating. In summer, the heat pump unit transfers waste heat from the end-users to the circulating water in the energy tower, where it exchanges heat with the air to release the waste heat back into the air. Conventional energy tower heat pumps typically have only one end in contact with the environment, while the other end connects to the cooling and heating / heating system. Their general function is limited to producing chilled water in summer and hot water in winter.

[0004] Evaporation and concentration devices increase the solute content by heating and vaporizing the solvent in a solution, thereby increasing its proportion. Conventional evaporation and concentration devices continuously supply heat to the solution and use fans to continuously extract the evaporated vapor, causing the solvent to continuously evaporate into the gas phase. The extracted vapor is often condensed and discharged or directly, without recovering its heat, thus consuming a large amount of energy. Furthermore, for solutions containing heat-sensitive solutes, using heat exchangers to provide heat may result in localized high temperatures that destroy the solute's value, and traditional hot air evaporation has relatively low heat and mass transfer efficiency at the liquid surface.

[0005] Therefore, how to provide a multifunctional system that possesses the original functions of the above-mentioned traditional energy tower heat pump and evaporation concentration device, and overcomes the defects of the above-mentioned traditional devices, is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] This utility model provides a multifunctional energy tower heat pump system to solve the problems of conventional energy tower heat pumps in the prior art, which do not have the function of producing high-temperature hot water or even steam, nor do they have the function of evaporating and concentrating solutions and recovering energy; conventional evaporation and concentration devices do not recover and utilize steam heat, which consumes a lot of energy; for heat-sensitive solutes, local high temperature may occur, which may destroy the value of the solute; and the heat and mass exchange efficiency of traditional hot air evaporation and concentration is low.

[0007] This utility model provides a multifunctional energy tower heat pump system, including an energy tower circulation subsystem, a combined cooling and heating heat pump subsystem, a dehumidification and drainage subsystem, and a cascade heat pump high-temperature hot water and steam subsystem; wherein...

[0008] The energy tower circulation subsystem and the combined cooling and heating heat pump subsystem work together to produce chilled water and hot water.

[0009] The synergistic effect of the energy tower circulation subsystem, the combined cooling and heating heat pump subsystem, and the cascade heat pump high-temperature hot water and steam subsystem can be used to produce high-temperature hot water and steam.

[0010] The synergistic effect of the energy tower circulation subsystem, the combined cooling and heating heat pump subsystem, and the dehumidification and drainage subsystem can be used for solution concentration.

[0011] According to the present invention, a multifunctional energy tower heat pump system is provided, wherein the energy tower circulation subsystem includes an energy tower, packing, a fan, a first butterfly valve, a second butterfly valve, a third butterfly valve, a first pump body, a second pump body, and a third pump body;

[0012] The energy tower is equipped with a circulating air duct, a spray tank at the top, and a bottom tank at the bottom; there is filler between the spray tank and the bottom tank.

[0013] The outlet of the first pump body is connected to the bottom tank for feeding liquid into the bottom tank;

[0014] The inlet connection of the second pump body is used to drain liquid from the bottom tank to the outside.

[0015] The inlet of the third pump body is connected to the bottom groove, and the outlet of the third pump body is connected to the spray tank.

[0016] The fan is located on the air outlet side of the packing material, before it enters the circulating air duct, and is used to force the packing material to enter and exit the air or circulate it in the circulating air duct.

[0017] The first butterfly valve is located at the opening next to the air duct on the air outlet side of the fan; the second butterfly valve is located at the opening next to the air duct on the air inlet side of the packing, after the outlet of the circulating air duct; the third butterfly valve is located inside the circulating air duct.

[0018] According to the present invention, a multifunctional energy tower heat pump system is provided, wherein the combined cooling and heating heat pump subsystem includes a first heat exchanger, a second heat exchanger, a third heat exchanger, a four-way valve, a first compressor, and a first hot water tank.

[0019] The first heat exchanger is located inside the circulating air duct, after the dehumidification and drainage subsystem. The inlet and outlet of the first heat exchanger are respectively equipped with a first solenoid valve and a second solenoid valve.

[0020] The second heat exchanger is connected to the outlet pipe of the third pump body before entering the energy tower, and the working fluid side is connected in series in the main working fluid circulation pipeline of the subsystem; a third solenoid valve is installed at the working fluid outlet of the second heat exchanger.

[0021] The first heat exchange tank is connected in parallel to the main working fluid circulation pipeline of the subsystem; a fourth solenoid valve and a fifth solenoid valve are respectively installed at the working fluid inlet and outlet of the first heat exchange tank.

[0022] The third heat exchanger is connected in parallel to the main working fluid circulation pipeline of the subsystem. The sixth solenoid valve and the seventh solenoid valve are respectively installed at the working fluid inlet and outlet of the third heat exchanger.

[0023] One end of the eighth solenoid valve is connected to the pipe before the second heat exchanger, and the other end is connected to the pipe between the fourth solenoid valve and the first heat exchange tank.

[0024] According to the present invention, a multifunctional energy tower heat pump system is provided, wherein the dehumidification and drainage subsystem includes a second compressor, a fourth heat exchanger, a fifth heat exchanger, and a drain valve;

[0025] The fourth and fifth heat exchangers are located inside the circulating air duct, behind the air outlet side of the fan; the fifth heat exchanger is in front of the fourth heat exchanger, and the circulating air first passes through the fifth heat exchanger and then through the fourth heat exchanger.

[0026] The high-temperature working fluid discharged from the second compressor enters the fourth heat exchanger along the pipeline to release heat. After condensation or cooling, the working fluid reaches the ninth solenoid valve along the pipeline. After throttling and expansion through the ninth solenoid valve, the temperature becomes even lower. It then enters the fifth heat exchanger along the pipeline to absorb heat and evaporate, and then enters the second compressor again.

[0027] The steam trap is located below the air duct at the fifth heat exchanger position.

[0028] According to the present invention, a multifunctional energy tower heat pump system is provided, wherein the cascade heat pump high-temperature hot water steam subsystem is installed on a third heat exchanger and includes a third compressor, a second hot water tank, and a fourth compressor. The working fluid of the cascade heat pump high-temperature hot water steam subsystem passes through the third heat exchanger and enters the third compressor through a pipeline. The third compressor, the second hot water tank, the tenth solenoid valve, and the third heat exchanger are sequentially connected to form a loop. The inlet pipe of the fourth compressor is connected to the top of the second hot water tank, and the water flash steam in the tank enters the fourth compressor for compression and discharge.

[0029] According to the present invention, a multifunctional energy tower heat pump system is provided, wherein the first compressor, the second compressor, the third compressor and the fourth compressor are Roots compressors or screw compressors.

[0030] According to the multifunctional energy tower heat pump system provided by this utility model, the first heat exchanger, the fourth heat exchanger, and the fifth heat exchanger are one of plate heat exchangers, coil heat exchangers, and finned heat exchangers; the second heat exchanger and the third heat exchanger are one of plate heat exchangers and shell-and-tube heat exchangers.

[0031] According to the multifunctional energy tower heat pump system provided by this utility model, the interiors of the first and second hot water exchange tanks can be equipped with heat exchange coils.

[0032] According to the present invention, a multifunctional energy tower heat pump system is provided, wherein the fan is an axial flow fan.

[0033] According to the present invention, a multifunctional energy tower heat pump system is provided, wherein the packing material is perforated corrugated packing.

[0034] The multifunctional energy tower heat pump system provided by this utility model has heat and mass exchange when the energy tower comes into contact with flowing air. It can not only exchange heat with the external environment, but also has the ability to collect cold and heat from the external environment. At the same time, the energy tower of this utility model also utilizes its mass transfer properties and combines energy recovery design to develop the evaporation and concentration function of the energy tower for different heat-sensitive solutions.

[0035] This utility model of a cascade high-temperature heat pump can produce hot water at higher temperatures, and by increasing the enthalpy of the compressor's flash compression, it can further produce steam at even higher temperatures.

[0036] This invention utilizes the characteristic of mass transfer driven by the relative flow of gas and liquid phases on the surface of the packing material, avoiding the use of high-temperature evaporation and greatly reducing the problem of solute deterioration caused by excessively high local temperatures. At the same time, the design of the packing surface is conducive to enhancing mass and heat transfer, resulting in higher evaporation efficiency of water. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a structural block diagram of the multifunctional energy tower heat pump system provided by this utility model.

[0039] Figure label:

[0040] 1. Ninth solenoid valve; 2. Second compressor; 3. First butterfly valve; 4. Fourth heat exchanger; 5. Fifth heat exchanger; 6. Fan; 7. First pump body; 8. Second pump body; 9. Steam trap; 10. Energy tower; 11. Packing; 12. Third butterfly valve; 13. Third pump body; 14. First heat exchanger; 15. Second butterfly valve; 16. Second heat exchanger; 17. First solenoid valve; 18. Second solenoid valve; 19. Four-way valve; 20. First compressor; 21. Third solenoid valve; 22. Sixth solenoid valve; 23. Seventh solenoid valve; 24. Fourth solenoid valve; 25. Fifth solenoid valve; 26. Third heat exchanger; 27. First hot water tank; 28. Third compressor; 29. ​​Tenth solenoid valve; 30. Second hot water tank; 31. Fourth compressor; 32. Eighth solenoid valve. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] The following is combined Figure 1 This utility model describes a multifunctional energy tower heat pump system, which includes an energy tower circulation subsystem, a combined cooling and heating heat pump subsystem, a dehumidification and drainage subsystem, and a cascade heat pump high-temperature hot water and steam subsystem.

[0043] The energy tower circulation subsystem and the combined cooling and heating heat pump subsystem work together to produce chilled water and hot water. The energy tower circulation subsystem, the combined cooling and heating heat pump subsystem, and the cascade heat pump high-temperature hot water and steam subsystem work together to produce high-temperature hot water and steam. The energy tower circulation subsystem, the combined cooling and heating heat pump subsystem, and the dehumidification and drainage subsystem work together to concentrate solutions.

[0044] The multifunctional energy tower heat pump system provided by this utility model can not only alleviate the collection of cold and heat from the outside, but also utilize its mass transfer properties and combine energy recovery to develop the evaporation and concentration function of the energy tower for different heat-sensitive solutions.

[0045] Conventional energy tower heat pumps typically produce hot water at 40-45°C. This invention, by superimposing a high-temperature heat pump on top of this, can produce hot water at even higher temperatures. Furthermore, by adding a compressor for flash compression and enthalpy enhancement, it can produce steam at even higher temperatures.

[0046] Specifically, the energy tower circulation subsystem includes an energy tower 10, packing material 11, a fan 6, a first butterfly valve 3, a second butterfly valve 15, a third butterfly valve 12, a first pump body 7, a second pump body 8, and a third pump body 13. The energy tower 10 has a circulation duct inside. The top of the energy tower 10 has a spray trough, and the bottom has a bottom trough; packing material 11 is located between the spray trough and the bottom trough. The outlet of the first pump body 7 is connected to the bottom trough for introducing liquid into the bottom trough. The inlet of the second pump body 8 is connected to the bottom trough for discharging liquid from the bottom trough. The inlet of the third pump body 13 is connected to the bottom trough, and the outlet of the third pump body 13 is connected to the spray trough. The fan 6 is located on the outlet side of the packing material 11, before entering the circulation duct, and is used to force air into and out of the packing material 11 or to circulate it within the circulation duct. The first butterfly valve 3 is located at an opening beside the duct on the outlet side of the fan 6; the second butterfly valve 15 is located on the inlet side of the packing material 11, at an opening beside the duct after the outlet of the circulation duct; the third butterfly valve 12 is located inside the circulation duct.

[0047] In the above embodiments, the first butterfly valve 3 and the second butterfly valve 15 are open, and the third butterfly valve 12 is closed. This allows the energy tower 10 to exchange heat and mass with the outside air, and conversely, the energy tower 10 exchanges heat and mass with the circulating air. The spray liquid enters and exits from the top and bottom of the packing 11, and the air enters and exits from the front and back. The spray liquid and the air exchange heat and mass within the packing 11. The fan 6 draws away the air passing through the packing 11, and the spray liquid falls into the bottom tank.

[0048] Furthermore, the combined cooling and heating pump subsystem includes a first heat exchanger 14, a second heat exchanger 16, a third heat exchanger 26, a four-way valve 19, a first compressor 20, and a first hot water tank 27. The first heat exchanger 14 is located within the circulating air duct, after the dehumidification and drainage subsystem. Circulating air passes through the first heat exchanger 14 to transfer cooling or heating energy to the working fluid. The inlet and outlet of the first heat exchanger 14 are respectively equipped with a first solenoid valve 17 and a second solenoid valve 18. The opening and closing of the first solenoid valve 17 and the second solenoid valve 18 control the use and shutdown of the first heat exchanger 14. The second heat exchanger 16 is connected to the outlet pipe of the third pump body 13 before entering the energy tower, and its working fluid side is connected in series in the subsystem's working fluid circulation main pipeline.

[0049] A third solenoid valve 21 is installed at the working fluid outlet of the second heat exchanger 16, which acts as a throttling expansion valve or can disconnect the second heat exchanger 16 from the subsystem loop. The first heat exchange tank 27 is connected in parallel to the subsystem working fluid circulation main pipeline; a fourth solenoid valve 24 and a fifth solenoid valve 25 are respectively installed at the working fluid inlet and outlet of the first heat exchange tank 27, which act as throttling expansion valves or can disconnect the first heat exchange tank 27 from the subsystem loop. The third heat exchanger 26 is connected in parallel to the subsystem working fluid circulation main pipeline; a sixth solenoid valve 22 and a seventh solenoid valve 23 are respectively installed at the working fluid inlet and outlet of the third heat exchanger 26, which act as throttling expansion valves or can disconnect the third heat exchanger 26 from the subsystem loop. One end of the eighth solenoid valve 32 is connected to the pipe before the second heat exchanger 16, and the other end is connected to the pipe between the fourth solenoid valve 24 and the first heat exchange tank 27. When it is opened, it bypasses the second heat exchanger 16 and connects the subsystem loop.

[0050] Furthermore, the dehumidification and drainage subsystem includes a second compressor 2, a fourth heat exchanger 4, a fifth heat exchanger 5, and a drain valve 9. The fourth heat exchanger 4 and the fifth heat exchanger 5 are located inside the circulating air duct, behind the air outlet side of the fan 6; the fifth heat exchanger 5 is in front of the fourth heat exchanger 4, and the circulating air first passes through the fifth heat exchanger 5 and then through the fourth heat exchanger 4.

[0051] The high-temperature working fluid discharged from the second compressor 2 enters the fourth heat exchanger 4 through the pipeline to release heat. After condensation or cooling, the working fluid reaches the ninth solenoid valve 1 through the pipeline. After the throttling expansion of the ninth solenoid valve 1, the temperature becomes lower. It enters the fifth heat exchanger 5 through the pipeline to absorb heat and evaporate, and then enters the second compressor 2 again.

[0052] The steam trap 9 is located below the air duct at position 5 of the fifth heat exchanger, and the condensate from the circulating air is discharged from the air duct through the steam trap 9.

[0053] Furthermore, the cascade heat pump high-temperature hot water steam subsystem is installed on the third heat exchanger 26, including the third compressor 28, the second hot water tank 30, and the fourth compressor 31. The third compressor 28, the second hot water tank 30, the tenth solenoid valve 29, and the third heat exchanger 26 are connected in sequence to form a loop. The inlet pipe of the fourth compressor 31 is connected to the top of the second hot water tank 30, and the flash steam in the tank enters the fourth compressor 31 for compression and discharge. The working fluid of the cascade heat pump high-temperature hot water steam subsystem passes through the third heat exchanger 26 and enters the third compressor 28 through the pipe. After the working fluid steam is heated, it enters the second hot water tank 30 to heat the water in the tank. After condensation and cooling, it travels along the pipe to the tenth solenoid valve 29. After throttling and expansion by the tenth solenoid valve 29, the temperature becomes even lower. It then enters the third heat exchanger 26 through the pipe to absorb heat and evaporate, and then enters the third compressor 28. The inlet pipe of the fourth compressor 31 is connected to the top of the second hot water tank 30, and the flash steam in the tank enters the fourth compressor 31 to be heated into higher temperature steam.

[0054] The working method of the multifunctional energy tower heat pump system of this utility model includes: opening the first butterfly valve 3 and the second butterfly valve 15, closing the third butterfly valve 12, starting the fan 6 and the third pump body 13, starting the combined cooling and heating pump subsystem and connecting it to the second heat exchanger 16 and the first hot water tank 27, but not connecting it to the first heat exchanger 14 and the third heat exchanger 26, switching the corresponding four-way valve 19 for regulating the cooling water, and controlling the opening degree of the solenoid valve that plays a throttling and expansion role according to the superheat. Ambient air is drawn into the energy tower by the fan 6, and when it passes through the packing 11, it exchanges heat and mass with the spray liquid, and is then discharged by the fan 6. The solution that has obtained cooling or heat is pumped into the second heat exchanger 16 by the third pump body 13 for heat exchange, and after heat exchange, it is sprayed onto the packing 11 to continue heat and mass exchange with the air; the working fluid of the combined cooling and heating pump subsystem obtains cooling or heat through the second heat exchanger 16.

[0055] When the working fluid obtains cooling capacity, the four-way valve 19 is adjusted to connect the pipes 111 and 112, 115 and 114 so that the working fluid flows from the first compressor 20 to the second heat exchanger 16. The third solenoid valve 21 plays a throttling and expansion role and adjusts its opening according to the superheat. The fourth solenoid valve 24 and the fifth solenoid valve 25 are fully open, and the solenoid valves of other combined cooling and heating pump subsystems are fully closed. The working fluid is throttled and cooled by the third solenoid valve 21 and enters the first heat exchange tank 27 to absorb heat from the water in the tank and make cold water.

[0056] When the working fluid gains heat, the four-way valve 19 is adjusted to connect the pipes 112 and 114, 111 and 115 so that the working fluid flows from the first compressor 20 to the first heat exchange tank 27. The third solenoid valve 21 acts as a throttling and expansion valve, adjusting its opening according to the degree of superheat. The fourth solenoid valve 24 and the fifth solenoid valve 25 are fully open, and the solenoid valves of other combined cooling and heating pump subsystems are fully closed. After being compressed, the working fluid enters the first heat exchange tank 27 and releases heat to the water in the tank to produce hot water.

[0057] In a feasible embodiment of this utility model, the working method of the multifunctional energy tower heat pump system further includes producing higher temperature hot water and steam: opening the first butterfly valve 3 and the second butterfly valve 15, closing the third butterfly valve 12, starting the fan 6 and the third pump body 13, starting the combined cooling and heating heat pump subsystem and connecting it to the second heat exchanger 16 and the third heat exchanger 26, without connecting it to the first heat exchanger 14 and the first hot water tank 27, starting the cascade heat pump high temperature hot water and steam subsystem. The method by which the working fluid of the combined cooling and heating heat pump subsystem obtains heat is the same as when producing hot water, except that after the working fluid is compressed, it transfers heat to the cascade heat pump high temperature hot water and steam subsystem in the third heat exchanger 26. After absorbing heat, the working fluid of the subsystem is heated to a higher temperature by the third compressor 28 and enters the second hot water tank 30 to release heat to the water in the tank to produce higher temperature hot water; when producing steam, starting the fourth compressor 31 draws air from the second hot water tank 30, and the water in the tank flashes out steam under negative pressure. The steam is then compressed and heated by the fourth compressor 31 to become higher temperature steam.

[0058] In the above operation, the working fluid of the compressor in the high-temperature hot water steam subsystem of the cascade heat pump is steam. A Roots compressor is used for the compressor operating below 108℃, and a screw compressor is used for the compressor operating between 108℃ and 120℃. For the fourth heat exchanger 4, the fifth heat exchanger 5, and the first heat exchanger 14, plate heat exchangers, coil heat exchangers, and finned heat exchangers can be used. For the second heat exchanger 16 and the third heat exchanger 26, plate heat exchangers and shell-and-tube heat exchangers can be used. Heat exchange coils can be used in the first hot water tank 27 and the second hot water tank 30. An axial flow fan is recommended for the fan 6. Perforated corrugated packing is recommended for the packing 11. For the spray fluid: water is recommended when collecting cold energy from the air, and antifreeze is recommended when collecting heat energy from the air.

[0059] In a feasible embodiment of this utility model, the working method of the multifunctional energy tower heat pump system further includes solution concentration: closing the first butterfly valve 3 and the second butterfly valve 15, opening the third butterfly valve 12, starting the fan 6 and the third pump body 13, starting the combined cooling and heating pump subsystem according to process conditions and connecting it to the first heat exchanger 14, and depending on the situation, only connecting it to the second heat exchanger 16 or the first hot water tank 27, starting the dehumidification and drainage subsystem, and starting the first pump body 7 and the second pump body 8; air is drawn by the fan 6 and circulates in the energy tower 10 and the circulating air duct, and when passing through the packing 11, it mixes with the spray liquid. In the heat and mass exchange process, the air carries away some of the water from the sprayed solution. When passing through the fifth heat exchanger 5, the air loses heat, causing the added water to condense and be discharged from the drain valve 9. Then, when passing through the fourth heat exchanger 4, it gains the sum of the heat lost in the fifth heat exchanger 5 and the enthalpy increase of the second compressor 2. If the temperature rises to a higher level than before passing through the packing 11, it gives heat back to the temperature before passing through the packing 11 when passing through the first heat exchanger 14. If the temperature does not reach the temperature before passing through the packing 11, it gains heat when passing through the first heat exchanger 14 and rises to the temperature before passing through the packing 11.

[0060] The first pump body 7 and the second pump body 8 replenish and discharge the solution in the bottom tank of the energy tower 10 with a stable flow rate. When the circulating air needs to be cooled after passing through the first heat exchanger 14, the combined cooling and heating pump subsystem adjusts the four-way valve 19 to connect the pipelines 110 and 114, 111 and 112 so that heat flows from the first heat exchanger 14 to the second heat exchanger 16 and is transferred to the spray liquid pumped by the third pump body 13, or closes the third solenoid valve 21 and the fourth solenoid valve; opens the fifth solenoid valve 25 and the eighth solenoid valve 32 to connect the pipelines 110 and 114, 111 and 112 so that heat flows from the first heat exchanger 14 to the first hot water tank 27; when the circulating air needs to be heated after passing through the first heat exchanger 14, the combined cooling and heating pump subsystem adjusts the four-way valve 19 to connect the pipelines 110 and 111, 112 and 114 so that heat is obtained by the second heat exchanger 16 from the spray liquid pumped by the third pump body 13 and flows to the first heat exchanger 14.

[0061] In one feasible embodiment of this utility model, the working method of the multifunctional energy tower heat pump system further includes: concentration of solutions for solutes with different heat sensitivity: for solutions of solutes with low heat sensitivity, such as seawater and wastewater, the solution is heated and evaporated, which is suitable for scenarios with low ambient temperature, such as winter. The high-temperature solution exchanges heat and mass with the circulating air. The working fluid of the subsystem containing the compressor is water vapor, R718, R744, R245fa, R1233zd, etc.

[0062] For solutions with high heat sensitivity, such as traditional Chinese medicine, proteins, vitamins, and fruit juices, cooling solution evaporation is used, which is suitable for scenarios with high ambient temperatures, such as summer. Low-temperature solutions exchange heat and mass with circulating air, and the working fluid of subsystems containing compressors is R22, R410a, etc.

[0063] In the process of producing high-temperature hot water and steam, steam is used as the working fluid in the compressor of the high-temperature hot water and steam subsystem of the cascade heat pump. Roots compressors are used for temperatures below 108℃, while screw compressors are used for temperatures between 108℃ and 120℃. Plate heat exchangers, coil heat exchangers, and finned heat exchangers can be used for the fourth heat exchanger 4, the fifth heat exchanger 5, and the first heat exchanger 14. Plate heat exchangers and shell-and-tube heat exchangers can be used for the second heat exchanger 16 and the third heat exchanger 26. Heat exchange coils can be used in the first hot water tank 27 and the second hot water tank 30. An axial flow fan is recommended for fan 6. Perforated corrugated packing is recommended for packing 11. For the spray fluid: water is recommended when collecting cold energy from the air, and antifreeze is recommended when collecting heat energy from the air.

[0064] More specifically, taking an ambient temperature of 30℃ and a process of converting 12℃ water to 7℃ water as an example: Open the first butterfly valve 3 and the second butterfly valve 15, close the second butterfly valve 12, start the fan 6 and the third pump body 13, start the combined cooling and heating pump subsystem and connect it to the second heat exchanger 16 and the first heat exchange tank 27, but do not connect it to the first heat exchanger 14 and the third heat exchanger 26. Ambient air at 30℃ is drawn into the energy tower 10 by the fan 6, and after passing through the packing 11, it exchanges heat and mass with the 35℃ spray water. The air is then discharged by the fan 6, and the water, cooled to 32℃, is pumped into the second heat exchanger 16 by the third pump body 13 for heat exchange. After heat exchange, it is sprayed back onto the packing 11 to continue exchanging heat and mass with the air. The combined cooling and heating pump subsystem regulates the four-way valve 19 to connect pipes 111 and 112, 115 and 114, ensuring the working fluid flows from the first compressor 20 to the second heat exchanger. 16. The third solenoid valve 21 adjusts its opening according to the superheat, the fourth solenoid valve 24 and the fifth solenoid valve 25 are fully open, and the solenoid valves of other combined cooling and heating pump subsystems are fully closed. The 37°C working fluid is cooled and condensed by the second heat exchanger 16, and then throttled down to 5°C by the third solenoid valve 21. It then enters the first heat exchange tank 27 to absorb heat and cool the 12°C water in the tank down to 7°C. After the working fluid evaporates, it enters the first compressor 20 and is heated to 37°C, and then enters the second heat exchanger 16 to continue heat exchange.

[0065] Taking the production of hot water at an ambient temperature of -5℃ and the conversion of 40℃ water to 45℃ water as an example: Open the first butterfly valve 3 and the second butterfly valve 15, close the third butterfly valve 12, start the fan 6 and the third pump body 13, start the combined cooling and heating pump subsystem and connect it to the second heat exchanger 16 and the first hot water tank 27, but do not connect it to the first heat exchanger 14 and the third heat exchanger 26. The -5℃ ambient air is drawn into the energy tower 10 by the fan 6, and when it passes through the packing 11, it exchanges heat and mass with the -10℃ spray liquid. After that, it is discharged by the fan 6. The antifreeze that has gained heat and been heated to -7℃ is pumped into the second heat exchanger 16 by the third pump body 13 for heat exchange. After heat exchange, it is sprayed onto the packing 11 to continue exchanging heat and mass with the air. The combined cooling and heating pump subsystem regulates the four-way valve 19 to connect the pipelines 112 and 114, 111 and 115 so that the working fluid flows from the first compressor 20 to the first hot water tank 27. The third solenoid valve 21 adjusts its opening according to the superheat, the fourth solenoid valve 24 and the fifth solenoid valve 25 are fully open, and the solenoid valves of other combined cooling and heating pump subsystems are fully closed. The -12℃ working fluid gains heat and evaporates through the second heat exchanger 16, enters the first compressor 20 to compress and raise its temperature to 47℃, and then enters the first heat exchange tank 27 to release heat and raise the temperature of the 40℃ water in the tank to 45℃. After the working fluid condenses, it passes through the third solenoid valve 21 to throttle and lower its temperature to -12℃, and then enters the second heat exchanger 16 to continue heat exchange.

[0066] Taking the ambient temperature of -5℃ as an example, the first step of producing high-temperature hot water / steam is the same as the method for producing hot water above, except that the connection to the first heat exchanger tank 27 is changed to the third heat exchanger 26, and the cascade heat pump high-temperature hot water / steam subsystem is started. The working fluid of the cascade heat pump high-temperature hot water / steam subsystem absorbs heat and evaporates into 45℃ steam through the third heat exchanger 26, then enters the third compressor 28 for compression and heating to 95℃, and then enters the second heat exchanger tank 30 to transfer heat to the water in the tank. After that, the working fluid condenses and is throttled down to 45℃ through the tenth solenoid valve 29; the fourth compressor 31 draws the pressure in the second heat exchanger tank 30 to negative pressure, and part of the water in the tank flashes into 90℃ water vapor, which enters the fourth compressor 31 and is compressed and heated to 108℃ water vapor.

[0067] Taking fruit juice concentration as an example, the concentration of heat-sensitive solute solutions is as follows: Close the first butterfly valve 3 and the second butterfly valve 15, open the third butterfly valve 12, start the fan 6 and the third pump body 13, start the combined cooling and heating pump subsystem connected to the first heat exchanger 14 and the first hot water tank 27, start the dehumidification and drainage subsystem, and start the first pump body 7 and the second pump body 8; 45°C air is drawn by the fan 6 and circulates in the energy tower 10 and the circulating air duct. When passing through the packing 11, it exchanges heat and mass with the spray liquid. The 45°C air carries away some of the water in the sprayed solution. When passing through the fifth heat exchanger 5, the air loses heat, causing the added water to condense and be discharged from the drain valve 9. After passing through the fourth heat exchanger 4, it gains the heat lost in the fifth heat exchanger 5 and the total energy of the enthalpy increase of the second compressor 2, rising to 52°C. After passing through the first heat exchanger 14, it gives off heat and returns to 45°C. The first pump body 7 and the second pump body 8 replenish and discharge the solution in the bottom tank of the energy tower 10 with a stable flow rate. The combined cooling and heating pump subsystem closes the third solenoid valve 21 and the fourth solenoid valve 24, opens the fifth solenoid valve 25 and the eighth solenoid valve 32, and adjusts the four-way valve 19 to connect the pipelines 110 and 114, 111 and 112 so that heat flows from the first heat exchanger 14 to the first hot water tank 27, and discharges the heat to the water in the tank.

[0068] Taking wastewater concentration as an example, the concentration of solutions containing non-heat-sensitive solutes is as follows: First butterfly valve 3 and second butterfly valve 15 are closed, third butterfly valve 12 is opened, fan 6 and third pump body 13 are started, the combined cooling and heating pump subsystem is started and connected to first heat exchanger 14 and second heat exchanger 16, the dehumidification and drainage subsystem is started, and first pump body 7 and second pump body 8 are started. Air at 85°C is drawn by fan 6 and circulates in energy tower 10 and the circulating air duct. When passing through packing 11, it exchanges heat and mass with the sprayed liquid, carrying away some water from the sprayed solution. When passing through fifth heat exchanger 5, the air loses heat, causing the added water to condense and be discharged from drain valve 9. After passing through fourth heat exchanger 4, it gains the combined energy of the heat lost in fifth heat exchanger 5 and the enthalpy increase from second compressor 2, rising to 92°C. After passing through first heat exchanger 14, it releases heat and returns to 85°C. The first pump body 7 and the second pump body 8 replenish and discharge the solution in the bottom tank of the energy tower 10 with a stable flow rate. The combined cooling and heating pump subsystem regulates the four-way valve 19 to connect the pipelines 110 and 114, 111 and 112 so that heat flows from the first heat exchanger 14 to the second heat exchanger 16 and is transferred to the spray liquid pumped out by the third pump body 13.

[0069] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multifunctional energy tower heat pump system, characterized in that, This includes an energy tower circulation subsystem, a combined cooling and heating heat pump subsystem, a dehumidification and drainage subsystem, and a cascade heat pump high-temperature hot water and steam subsystem; among which, The energy tower circulation subsystem and the combined cooling and heating heat pump subsystem work together to produce chilled water and hot water. The synergistic effect of the energy tower circulation subsystem, the combined cooling and heating heat pump subsystem, and the cascade heat pump high-temperature hot water and steam subsystem can be used to produce high-temperature hot water and steam. The synergistic effect of the energy tower circulation subsystem, the combined cooling and heating heat pump subsystem, and the dehumidification and drainage subsystem can be used for solution concentration.

2. The multifunctional energy tower heat pump system according to claim 1, characterized in that, The energy tower circulation subsystem includes an energy tower (10), packing (11), a fan (6), a first butterfly valve (3), a second butterfly valve (15), a third butterfly valve (12), a first pump body (7), a second pump body (8), and a third pump body (13). The energy tower (10) is equipped with a circulating air duct. The top of the energy tower (10) has a spray trough and the bottom has a bottom trough. There is a packing material (11) between the spray trough and the bottom trough. The outlet of the first pump body (7) is connected to the bottom tank for feeding liquid into the bottom tank; The inlet connection of the second pump body (8) is used to discharge liquid from the bottom tank to the outside. The inlet of the third pump body (13) is connected to the bottom groove, and the outlet of the third pump body (13) is connected to the spray tank; The fan (6) is located on the air outlet side of the packing (11) before entering the circulating air duct, and is used to force the packing (11) to enter and exit the air or circulate in the circulating air duct; The first butterfly valve (3) is located at the opening next to the air duct on the air outlet side of the fan (6); the second butterfly valve (15) is located at the opening next to the air duct after the outlet of the circulating air duct on the air inlet side of the packing (11); the third butterfly valve (12) is located inside the circulating air duct.

3. The multifunctional energy tower heat pump system according to claim 2, characterized in that, The combined cooling and heating heat pump subsystem includes a first heat exchanger (14), a second heat exchanger (16), a third heat exchanger (26), a four-way valve (19), a first compressor (20), and a first hot water tank (27). The first heat exchanger (14) is located in the circulating air duct, after the dehumidification and drainage subsystem. The inlet and outlet of the first heat exchanger (14) are respectively equipped with a first solenoid valve (17) and a second solenoid valve (18). The second heat exchanger (16) is connected to the outlet pipe of the third pump body (13) before entering the energy tower (10), and the working fluid side is connected in series in the main working fluid circulation pipeline of the subsystem; a third solenoid valve (21) is provided at the working fluid outlet of the second heat exchanger (16). The first heat exchange tank (27) is connected in parallel to the main working fluid circulation pipeline of the subsystem; the first heat exchange tank (27) is equipped with a fourth solenoid valve (24) and a fifth solenoid valve (25) at the working fluid inlet and outlet respectively. The third heat exchanger (26) is connected in parallel to the main pipeline of the working fluid circulation of the subsystem. The sixth solenoid valve (22) and the seventh solenoid valve (23) are respectively installed at the working fluid inlet and outlet of the third heat exchanger (26). One end of the eighth solenoid valve (32) is connected to the pipe before the second heat exchanger (16), and the other end is connected to the pipe between the fourth solenoid valve (24) and the first heat exchange tank (27).

4. The multifunctional energy tower heat pump system according to claim 3, characterized in that, The dehumidification and drainage subsystem includes a second compressor (2), a fourth heat exchanger (4), a fifth heat exchanger (5), and a drain valve (9). The fourth heat exchanger (4) and the fifth heat exchanger (5) are located in the circulating air duct, behind the air outlet side of the fan (6); the fifth heat exchanger (5) is in front of the fourth heat exchanger, and the circulating air passes through the fifth heat exchanger (5) first, and then through the fourth heat exchanger (4). The second compressor (2) discharges high-temperature working fluid into the fourth heat exchanger (4) through the pipeline to release heat. After condensation or cooling, the working fluid reaches the ninth solenoid valve (1) through the pipeline. After the throttling expansion of the ninth solenoid valve (1), the temperature becomes lower and enters the fifth heat exchanger (5) through the pipeline to absorb heat and evaporate. Then it enters the second compressor (2). The steam trap (9) is located below the air duct at the position of the fifth heat exchanger (5).

5. The multifunctional energy tower heat pump system according to claim 4, characterized in that, The cascade heat pump high-temperature hot water steam subsystem is installed on the third heat exchanger (26), including the third compressor (28), the second hot water tank (30), and the fourth compressor (31). The working fluid of the cascade heat pump high-temperature hot water steam subsystem passes through the third heat exchanger (26) and enters the third compressor (28) along the pipeline. The third compressor (28), the second hot water tank (30), the tenth solenoid valve (29) and the third heat exchanger (26) are connected in sequence to form a loop. The inlet pipe of the fourth compressor (31) is connected to the top of the second hot water tank (30), and the water flash steam in the tank enters the fourth compressor (31) for compression and discharge.

6. The multifunctional energy tower heat pump system according to claim 5, characterized in that, The first compressor (20), the second compressor (2), the third compressor (28) and the fourth compressor (31) are Roots compressors or screw compressors.

7. The multifunctional energy tower heat pump system according to claim 6, characterized in that, The first heat exchanger (14), the fourth heat exchanger (4) and the fifth heat exchanger (5) are one of plate heat exchangers, coil heat exchangers and finned heat exchangers; the second heat exchanger (16) and the third heat exchanger (26) are one of plate heat exchangers and shell-and-tube heat exchangers.

8. The multifunctional energy tower heat pump system according to claim 6, characterized in that, The interior of the first hot water tank (27) and the second hot water tank (30) may be equipped with heat exchange coils.

9. The multifunctional energy tower heat pump system according to claim 6, characterized in that, The fan (6) is an axial flow fan.

10. The multifunctional energy tower heat pump system according to claim 6, characterized in that, The packing material (11) is a perforated corrugated packing material.

Images