CN110901875B - Ship waste heat driven cyclic regeneration rotating wheel dehumidification air-conditioning system and optimization method - Google Patents
Ship waste heat driven cyclic regeneration rotating wheel dehumidification air-conditioning system and optimization method Download PDFInfo
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- CN110901875B CN110901875B CN201911097157.XA CN201911097157A CN110901875B CN 110901875 B CN110901875 B CN 110901875B CN 201911097157 A CN201911097157 A CN 201911097157A CN 110901875 B CN110901875 B CN 110901875B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/02—Ventilation; Air-conditioning
- B63J2/04—Ventilation; Air-conditioning of living spaces
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Abstract
The invention discloses a cyclic regeneration rotating wheel dehumidification air-conditioning system driven by ship waste heat and an optimization method. The compartment return air enters the system and then is divided, and one stream of the compartment return air enters the condensing device after being dehumidified by the rotating wheel; and the other stream is heated by an air heat exchanger and then is introduced into a rotating wheel regeneration area, the regenerated stream enters a condensing device, the cooled two streams of air return to the cabin, and the cooled water is collected and used as cooling water again after being cooled. The heat in the air heat exchanger comes from the waste heat of ship equipment, the temperature of regenerated wind is 130-180 ℃, and the optimal flow dividing coefficient of wet air is 50-70%. The cyclic regeneration rotating wheel dehumidification air-conditioning system utilizes the ship waste heat as the regeneration heat source of the dehumidification rotating wheel, and can obviously reduce the dehumidification energy consumption; in the closed cabin of the ship, the dehumidification capacity can be adjusted by adjusting the shunting proportion of the regenerated wind, and the dehumidification effect of the system can be effectively improved.
Description
Technical Field
The invention relates to the technical field of rotary wheel dehumidification and waste heat utilization, in particular to a cyclic regeneration rotary wheel dehumidification air-conditioning system driven by ship waste heat and an optimization method.
Background
Air temperature and relative humidity in the ship closed cabin are high, the high humidity easily causes corrosion of a ship body, reduces cable insulation performance and causes serious potential safety hazards, and therefore deep dehumidification equipment is urgently needed to control the air humidity in the cabin. At present, two modes of air conditioning dehumidification and seawater direct condensation dehumidification are generally adopted in a ship cabin atmospheric environment control system, and the principle is that when the surface temperature of a heat exchanger is lower than the dew point temperature of air, water in the air is analyzed, but the dehumidification energy consumption is increased due to the fact that the air temperature is reduced.
The application of the rotary wheel dehumidification technology can achieve a deep dehumidification effect, can recycle the ship waste heat, and obviously reduces the energy consumption in the dehumidification process. In the sailing process of the ship, a large amount of medium-grade and high-grade waste heat exists, such as a diesel main engine, a diesel generator, an auxiliary boiler and the like, wherein the exhaust gas temperature of the diesel main engine is generally about 400 ℃, which accounts for about 30% of the total input heat, and the utilization rate of the conventional air conditioning and dehumidifying system on the waste heat of the ship is low. Patents CN203940546U and CN202216343U disclose two rotary wheel dehumidification systems, all using the ship waste heat as the regeneration heat source of the dehumidification rotary wheel, reducing the dehumidification energy consumption, but the regeneration air is obtained by mixing and heating the cabin return air and the fresh air, and is not suitable for the enclosed cabin. Therefore, the regeneration air source of the ship cabin rotary wheel dehumidification system needs to be improved, the waste heat is directly recovered from part of the cabin return air and is recycled as the regeneration air, and the dehumidification effect is improved through parameter optimization.
In view of the above, it is necessary to develop an internal circulation rotary dehumidification system and an optimization method for improving dehumidification effect by using ship waste heat.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a ship waste heat driven cyclic regeneration rotary wheel dehumidification air-conditioning system and an optimization method, wherein cabin return air divides one air stream to serve as regeneration air, the system dehumidification effect can be improved by adjusting the division ratio of the regeneration air, and simultaneously the ship waste heat can be effectively utilized, so that the energy consumption of the rotary wheel dehumidification air-conditioning system is reduced, and the energy utilization rate is improved; the regeneration wind enters a runner regeneration zone after being heated by an air heat exchanger, the heat in the air heat exchanger comes from the ship waste heat, and the waste heat determines the optimal shunting proportion; finally, the cooled air is sent back to the cabin to complete the internal circulation.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an utilize circulation regeneration runner dehumidification air conditioning system of boats and ships waste heat, the air outlet in boats and ships cabin links to each other with the three-way valve, the three-way valve concatenates through the tuber pipe with the air intake of dehumidification runner, air heat exchanger respectively, the dehumidification runner include dehumidification district and regeneration area, the air intake in three-way valve and dehumidification district concatenates through the tuber pipe, the air outlet in dehumidification district and condensing equipment's air intake concatenate through the tuber pipe, air heat exchanger's air outlet and the air intake in regeneration area concatenate through the tuber pipe, wherein the air intake in regeneration area is equipped with pressure compensator, the air outlet in regeneration area and condensing equipment's air intake concatenate through the tuber pipe, condensing equipment's air outlet and boats and ships cabin air intake concatenate through the tuber pipe, the storage water tank is used for collecting the water after the condensation and treats its cooling back and regard as the comdenstion water again to use.
And the air outlet of the ship cabin is connected with the three-way valve in series through an air pipe.
The dehumidification runner on be provided with for its runner motor that provides power, the dehumidification runner pass through gear or belt with the motor is connected.
The dehumidifying material of the dehumidifying wheel has the characteristics of high temperature resistance and good water absorption performance, such as silica gel, molecular sieve and the like.
The rotating speed of the dehumidifying rotating wheel is 8-12 r/h.
The regeneration wind degree of the dehumidification rotating wheel is 130-180 ℃, and the optimal wet air split ratio is 50-70%.
The air flow dividing ratio of the system is regulated and controlled by adopting a more accurate electric control regulating valve, namely the three-way valve is an electric control valve which is more accurate in control.
The optimal wet air split ratio of the system takes the product of the moisture content of the air outlet of the dehumidification area of the measuring rotating wheel and the split ratio as a standard, and when the product reaches an extreme value, the split ratio reaches the optimal value.
The dehumidification rotating wheel dehumidification area and the regeneration area are subjected to air cross due to large air pressure, and a pressure compensator is required to be additionally arranged at an air inlet of the regeneration area to balance the pressure of the two areas.
The air heat exchanger heats the regenerated wind by using waste heat generated by the ship equipment.
The end part of the condensing device is provided with a water pump for providing condensed water.
The condensing device can adopt a plate heat exchanger, has the characteristics of high heat exchange efficiency, small occupied area, long service life and the like, and enables condensed water and high-temperature air to flow in the flow channels on the two sides of each plate respectively to exchange heat through the plates.
The rotating wheel dehumidification system is of a closed circulation structure, and condensed air is sent back to the cabin.
During the use, the high temperature and high humidity air who comes from the cabin is shunted through the three-way valve, one is dehumidified through runner dehumidification district, another strand is heated through air heat exchanger, constantly regulate and control the heat transfer volume and make air heat exchanger export air temperature reach the regeneration temperature of runner desiccant gradually, measure the export air moisture content in runner dehumidification district and the reposition of redundant personnel proportion of three-way valve and calculate the system dehumidification effect under the current reposition of redundant personnel proportion, constantly regulate and control the reposition of redundant personnel proportion of three-way valve and calculate the dehumidification effect under the different operating modes, relatively obtain the best reposition of redundant personnel proportion that corresponds under the best dehumidification effect.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the invention, one air is divided into the return air of the ship cabin as the regenerated air, the dehumidification effect of the system can be improved by adjusting the division ratio of the regenerated air, and simultaneously, the waste heat of the ship can be effectively utilized, the energy consumption of the rotary wheel dehumidification air-conditioning system is reduced, and the energy utilization rate is improved; the regeneration wind enters a runner regeneration zone after being heated by an air heat exchanger, the heat in the air heat exchanger comes from the ship waste heat, and the waste heat determines the optimal shunting proportion; finally, the condensed air is sent back to the cabin to complete the circulation. In conclusion, the invention can remarkably reduce the dehumidification energy consumption of the ship air conditioning system by recovering the abundant waste heat of the ship equipment as the regenerative heat source of the dehumidification rotating wheel; the invention can flexibly regulate and control the flow dividing proportion of the regenerated wind according to the grade and the quantity of the waste heat, so that the system achieves the best dehumidification performance.
Drawings
FIG. 1 is a system flow diagram of the present invention.
Wherein, 1, a ship cabin; 2. a water pump; 3. a condensing unit; 4. a three-way valve; 5. a dehumidification rotating wheel; 5-1, a dehumidification area; 5-2, a regeneration zone; 6. a rotary wheel motor; 7. an air heat exchanger; 8. a pressure compensator; 9. a water storage tank.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, the present invention is a rotary wheel dehumidification air conditioning system with cyclic regeneration using ship waste heat, which comprises a ship cabin 1, a water pump 2, a condensing unit 3, a three-way valve 4, a dehumidification rotary wheel 5, a rotary wheel motor 6, an air heat exchanger 7, a pressure compensator 8, and a water storage tank 9.
The air outlet of the ship cabin 1 is connected with the three-way valve 4 in series through an air pipe, the rotating wheel motor 6 is connected with the dehumidifying rotating wheel 5 in series through a gear or a belt, the three-way valve 4 is connected with the dehumidifying area 5-1 of the dehumidifying rotating wheel 5 and the air inlet of the air heat exchanger 7 in series through an air pipe respectively, the air outlet of the dehumidifying rotating wheel 5 dehumidifying area 5-1 is connected with the air inlet of the condensing device 3 in series through an air pipe, the air outlet of the air heat exchanger 7 is connected with the air inlet of the regenerating area 5-2 of the dehumidifying rotating wheel 5 in series through an air pipe, the air inlet of the regenerating area 5-2 is provided with a pressure compensator 8, the air outlet of the regenerating area 5-2 is connected with the air inlet of the condensing device 3 in series through an air pipe, the air outlet of the condensing device 3 is connected with the air inlet of the ship cabin 1 in series through an air pipe, and the water inlet of the condensing device 3 is connected with the water outlet of the water pump 2 in series through a water pipe.
The working principle of the invention is as follows:
after return air from a ship cabin 1 enters a rotary wheel dehumidification air-conditioning system, firstly, the return air is adjusted and divided through a three-way valve 4, a strand of air enters a dehumidification area 5-1 of a dehumidification rotary wheel 5, a drying agent on a dehumidification channel dehumidifies the humid air, and the dehumidified air enters a condensing device 3 for cooling; the other air enters an air heat exchanger 7 to be heated, the heat in the air heat exchanger 7 comes from the waste heat of the ship, the heated air enters a regeneration area 5-2 of a dehumidification rotating wheel 5 to realize desorption regeneration of a drying agent, high-humidity air at the outlet of the regeneration area enters a condensing device 3 to be cooled, condensed water in the condensing device 3 is provided by a water pump 2, the two cooled air flows are sent back to a cabin 1 to realize closed circulation, and a water storage tank 9 collects the condensed water and is reused as the condensed water after being cooled.
The invention recycles the waste heat generated by the running of the ship equipment as the heat source for regenerating the rotating wheel. And one air of the cabin return air is heated by an air heat exchanger 7 and then enters a runner regeneration area 5-2 as regenerated air, wherein the heat in the air heat exchanger 7 comes from the waste heat of the ship.
The rotary wheel dehumidification air-conditioning system utilizing the ship waste heat can obviously reduce the dehumidification energy consumption of cabin air, and the optimal shunting proportion of the regenerated wind is adjusted through the waste heat quantity so as to improve the dehumidification effect; the regenerated air in the system is obtained by directly shunting the cabin return air, so that the system flow is simplified.
The working process of the invention comprises a cabin air dehumidification process and a rotary wheel desiccant regeneration process.
And (3) dehumidifying process of cabin return air: after entering the rotary wheel dehumidification air-conditioning system, the high-humidity air in the cabin is divided into two air flows by the three-way valve 4, one air flow enters the dehumidification area 5-1 of the rotary wheel for dehumidification, the rotary wheel drying agent adsorbs moisture in the humid air, and the dehumidified air enters the condensing device 3.
The regeneration process of the rotary wheel drying agent is as follows: the other air after being divided is heated by the air heat exchanger 7, the heat in the air heat exchanger 7 comes from the waste heat of the ship, the wet air enters the regeneration area 5-2 of the rotating wheel after reaching the temperature required by the regeneration of the drying agent of the rotating wheel, the drying agent with saturated moisture absorption capacity is heated, the desorption regeneration process of the drying agent is completed, and the regenerated air enters the condensing device.
The present invention will be described in further detail with reference to specific examples below:
the method comprises the steps of taking a part with the cabin wet air volume of 1, 1-gamma and the temperature of 35 ℃ and the relative humidity of 90% under a typical working condition, entering a dehumidification rotating wheel to be dehumidified, heating the gamma part by an air heat exchanger 7, enabling the air temperature at the outlet of the air heat exchanger 7 to be 180 ℃, then entering a rotating wheel regeneration area to realize rotating wheel regeneration, finally cooling the two parts of air to 25 ℃ by a condensing device 3, and finally returning to a ship cabin. The dehumidification capacity of the runner system can be calculated when the diversion coefficient gamma is the value under the working condition.
Cabin air moisture content d133.13g/kg, moisture content d of saturated humid air at 25 ℃0The system split coefficient is gamma, 20.32 g/kg.
The system utilizes the deep dehumidification capability of the rotating wheel material to obtain air with lower humidity. The dehumidification of the regenerated high-temperature air still needs to be finished in a seawater condensing device, and the dehumidification effect of the air flow is the same as that of a conventional dehumidification system. Therefore, the evaluation index of the system dehumidification capacity is the dehumidification rate of the runner system:
TABLE 1 dehumidification rate of runner system under different flow-dividing coefficient conditions
The optimum flow-splitting coefficient gamma under the working condition can be known from the table 1optAbout 67% to maximize the desiccant capacity of the rotor system.
The change in the optimum split coefficient when the regeneration wind temperature was changed is shown in table 2.
TABLE 2 optimum splitting coefficient at different regeneration wind temperatures
The temperature of the regeneration air of the dehumidification rotating wheel in the system is 130-180 ℃, and the optimal flow dividing coefficient of the humid air is 50-70%.
Therefore, the valve opening degree needs to be flexibly adjusted according to the moisture content of the cabin air to be processed and the residual heat of the ship equipment so as to obtain the optimal flow dividing coefficient.
Claims (7)
1. A ship waste heat driven cyclic regeneration rotating wheel dehumidification air-conditioning system is characterized by comprising a ship cabin (1), a three-way valve (4), a dehumidification rotating wheel (5), an air heat exchanger (7) and a condensing device (3), wherein an air outlet of the ship cabin (1) is connected with the three-way valve (4) through an air pipe, the three-way valve (4) is respectively connected with the dehumidification rotating wheel (5) and an air inlet of the air heat exchanger (7) in series through air pipes, the dehumidification rotating wheel (5) comprises a dehumidification area (5-1) and a regeneration area (5-2), the three-way valve (4) and the air inlet of the dehumidification area (5-1) are connected in series through the air pipes, an air outlet of the dehumidification area (5-1) and an air inlet of the condensing device (3) are connected in series through the air pipes, an air outlet of the air heat exchanger (7) and the air inlet of the regeneration area (5-2) are connected in series through the air pipes, an air outlet of the regeneration area (5-2) is connected with an air inlet of the condensing device (3) in series through an air pipe, and an air outlet of the condensing device (3) is connected with an air inlet of the ship cabin (1) in series through an air pipe; the rotating speed of the dehumidifying rotating wheel (5) is 8-12 r/h; the temperature of the regenerated air of the dehumidification rotating wheel (5) is 130-180 ℃, and the wet air split ratio is 50-70%;
the optimization method of the ship waste heat driven cyclic regeneration rotating wheel dehumidification air-conditioning system comprises the following steps: high-temperature and high-humidity air from a ship cabin (1) is divided by a three-way valve (4), one air is dehumidified by a dehumidification area (5-1), the other air is heated by an air heat exchanger (7), the heat exchange quantity is continuously regulated and controlled to enable the outlet air temperature of the air heat exchanger (7) to gradually reach the regeneration temperature of a desiccant on a dehumidification rotating wheel (5), the outlet air moisture content of the dehumidification area (5-1) and the division ratio of the three-way valve (4) are measured to calculate the system dehumidification effect under the current division ratio, the division ratio of the three-way valve (4) is continuously regulated to calculate the dehumidification effect under different working conditions, and the corresponding optimal division ratio under the optimal dehumidification effect is obtained through comparison.
2. The system of claim 1, wherein the three-way valve (4) is an electrically controlled valve.
3. The system of claim 1, wherein the dehumidifying material of the dehumidifying rotor (5) is silica gel or molecular sieve.
4. A marine vessel residual heat driven rotary regenerative wheel dehumidification air conditioning system as claimed in claim 1, wherein a water pump (2) for providing condensed water is arranged at the end of the condensing device (3).
5. The system of claim 1, wherein the air inlet of the regeneration area (5-2) is provided with a pressure compensator (8).
6. The system of claim 1, wherein a water storage tank (9) for collecting condensed water is arranged at the lower side of the condensing device (3).
7. The system of claim 1, wherein the dehumidifying rotor (5) is provided with a rotor motor (6) for providing power for the dehumidifying rotor, and the dehumidifying rotor (5) is connected with the rotor motor (6) through a gear or a belt.
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| CN113859507B (en) * | 2021-08-31 | 2022-11-08 | 广州文冲船舶修造有限公司 | Rust-resistant dehumidification system in cabin |
| CN113731058A (en) * | 2021-09-30 | 2021-12-03 | 武汉蓝露科技发展有限公司 | Marine absorption formula water preparation system |
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