Ship air conditioning system, control method thereof, and ship

Abstract

The application relates to the ship technology field, and particularly discloses a ship air conditioning system, a control method thereof and a ship. The ship air conditioning system comprises a water chiller unit, a water-cooled heat exchange loop, an air-cooled heat exchange loop, a cooling fan and a switching valve group. The air outlet of the cooling fan is directed towards an air-cooled heat exchanger of the air-cooled heat exchange loop. The switching valve group can selectively communicate the outlet of a heat exchange circulating pump with the heat exchange inlet of a seawater heat exchanger and / or the heat exchange inlet of the air-cooled heat exchanger. The water-cooled heat exchange loop or the air-cooled heat exchange loop can be separately opened for cooling. During the ship berthing period, the air-cooled heat exchange loop can be separately opened for cooling, so that the cooling demand of the air conditioning system during the ship berthing period is met, fresh water resources are saved, the operation cost is reduced, and the water-cooled heat exchange loop and the air-cooled heat exchange loop can be simultaneously opened for cooling. During the sailing period, the water-cooled heat exchange loop and the air-cooled heat exchange loop can be operated in the economic power interval, so that the overall energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of marine technology, and in particular to a marine air conditioning system, its control method, and a ship. Background Technology

[0002] Marine air conditioning systems operate in heating, cooling, and ventilation modes. Heating is typically achieved using waste heat from the ship's propulsion system, as well as heat pumps and boilers. Cooling and ventilation are usually handled by chillers. Especially during cooling, the heat exchange requirement is high, and seawater is used for cooling. Seawater is drawn from the ship's hull by a cooling seawater pump to cool the condenser and remove heat from the cooling cycle. When ships are anchored in docks or ports, the high sediment and suspended particulate matter content in nearshore waters can cause severe blockage or wear to seawater filters, pumps, and related pipelines, significantly impacting equipment efficiency and lifespan.

[0003] In response, some technologies employ freshwater cooling, where seawater extraction is stopped during ship berthing, and the system connects to the dock's freshwater system for cooling. However, this approach consumes a large amount of freshwater resources, resulting in significant resource waste and increased operating costs. Summary of the Invention

[0004] The purpose of this invention is to provide a ship air conditioning system, its control method, and a ship that can meet the cooling needs of the air conditioning system during ship berthing without drawing seawater or connecting to fresh water, thus saving fresh water resources at the dock and reducing operating costs.

[0005] This invention provides a marine air conditioning system, comprising: The chiller unit has a heat exchanger inlet and a heat exchanger outlet on the condenser side. The heat exchanger inlet is connected to a heat exchanger replenishment pipe, and the heat exchanger outlet is connected to the inlet of a heat exchange circulation pump. A water-cooled heat exchange circuit is provided, wherein a seawater heat exchanger is provided on the water-cooled heat exchange circuit, and the heat exchange inlet and heat exchange outlet of the seawater heat exchanger are respectively connected to the outlet of the heat exchange circulation pump and the heat exchanger replenishment pipe. The cooling inlet of the seawater heat exchanger is connected to seawater, and the outlet of the seawater heat exchanger is connected to the ocean. An air-cooled heat exchange circuit is provided with an air-cooled heat exchanger. The heat exchange inlet and heat exchange outlet of the air-cooled heat exchanger are respectively connected to the outlet of the heat exchange circulation pump and the heat exchanger replenishment pipe. A cooling fan, with its outlet facing the air-cooled heat exchanger; The switching valve assembly enables the outlet of the heat exchange circulation pump to be selectively connected to the heat exchange inlet of the seawater heat exchanger and / or the heat exchange inlet of the air-cooled heat exchanger.

[0006] As a preferred technical solution for a ship's air conditioning system, the cooling inlet of the seawater heat exchanger is connected to the seawater tank, and a seawater filter and a seawater pump are sequentially installed on the connecting flow path between the seawater tank and the seawater heat exchanger.

[0007] As a preferred technical solution for a ship air conditioning system, it also includes a seawater temperature sensor and a water quality sensor assembly. The seawater temperature sensor is used to measure the temperature of the seawater in the seawater tank, and the water quality sensor assembly is used to measure the turbidity, suspended solids and particulate matter content of the seawater in the seawater tank.

[0008] As a preferred technical solution for a ship air conditioning system, it also includes an air temperature sensor, an air humidity sensor, and a wind speed sensor. The air temperature sensor is used to measure the air temperature at the air-cooled heat exchanger, the air humidity sensor is used to measure the air humidity at the air-cooled heat exchanger, and the wind speed sensor is used to measure the wind speed at the air-cooled heat exchanger.

[0009] As a preferred technical solution for a ship's air conditioning system, the switching valve group includes a water-cooled heat exchange valve and an air-cooled heat exchange valve. The water-cooled heat exchange valve is located in the connecting flow path between the heat exchange circulation pump and the seawater heat exchanger, and can open or close the connecting flow path between the heat exchange circulation pump and the seawater heat exchanger. The air-cooled heat exchange valve is located in the connecting flow path between the heat exchange circulation pump and the air-cooled heat exchanger, and can open or close the connecting flow path between the heat exchange circulation pump and the air-cooled heat exchanger.

[0010] This invention provides a control method for a ship air conditioning system, used to control a ship air conditioning system according to any of the above-mentioned schemes, the control method for the ship air conditioning system comprising: Determine the operating mode of the ship's air conditioning system; When the ship's air conditioning system is running in ventilation mode, the air-cooled heat exchange circuit is turned on and the cooling fan is turned off. When the ship's air conditioning system is running in cooling mode, the water-cooled heat exchange circuit and / or the air-cooled heat exchange circuit are turned on.

[0011] As a preferred technical solution for the control method of a ship's air conditioning system, when the ship's air conditioning system is operating in cooling mode, the opening of the water-cooled heat exchange circuit and / or the air-cooled heat exchange circuit includes: If the seawater quality meets the requirements, turn on the water-cooled heat exchange circuit and / or the air-cooled heat exchange circuit. If the seawater quality does not meet the requirements, turn on the air-cooled heat exchange circuit and the cooling fan.

[0012] As a preferred technical solution for the control method of a ship's air conditioning system, when the seawater quality meets the requirements, the activation of the water-cooled heat exchange circuit and / or the air-cooled heat exchange circuit includes: When the heat exchange efficiency of the water-cooled heat exchange circuit is greater than or equal to the heat exchange efficiency of the air-cooled heat exchange circuit, the water-cooled heat exchange circuit is turned on. When the heat exchange efficiency of the air-cooled heat exchange circuit is greater than or equal to that of the water-cooled heat exchange circuit, the air-cooled heat exchange circuit is turned on and the cooling fan is turned on.

[0013] As a preferred technical solution for the control method of a ship's air conditioning system, when the heat exchange efficiency of the water-cooled heat exchange loop is greater than or equal to the heat exchange efficiency of the air-cooled heat exchange loop, after starting the water-cooled heat exchange loop, the following is also included: Determine whether the heat exchange capacity meets the heat exchange requirements of the chiller unit. If not, open the air-cooled heat exchange circuit and shut down the cooling fan. Determine whether the total heat exchange power meets the heat exchange requirements of the chiller unit. If not, start the air-cooled heat exchange circuit and turn on the cooling fan.

[0014] The present invention provides a ship, including a ship air conditioning system of any of the above-described embodiments, or a control method for a ship air conditioning system applying any of the above-described embodiments.

[0015] The beneficial effects of this invention are as follows: This invention provides a marine air conditioning system that, by setting up a water-cooled heat exchange circuit and an air-cooled heat exchange circuit, and by incorporating a switching valve group, allows the outlet of the heat exchange circulation pump to selectively connect to the heat exchange inlet of the seawater heat exchanger and / or the heat exchange inlet of the air-cooled heat exchanger. This enables the independent activation of either the water-cooled or air-cooled heat exchange circuit for cooling. During ship berthing, the air-cooled heat exchange circuit can be activated independently to meet the cooling needs of the air conditioning system while meeting berthing requirements, eliminating the need to draw seawater or connect freshwater, thus conserving freshwater resources at the dock and reducing operating costs. Furthermore, it can also simultaneously activate both the water-cooled and air-cooled heat exchange circuits for cooling. During navigation, both circuits can operate within their economic power range, reducing overall energy consumption. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a ship air conditioning system in an embodiment of the present invention; Figure 2 This is a flowchart of the control method for a ship air conditioning system in an embodiment of the present invention; Figure 3 This is a flowchart illustrating the process of determining the operating mode of an air conditioning system in an embodiment of the present invention; Figure 4 This is a flowchart illustrating the process of activating the water-cooled heat exchange circuit and / or the air-cooled heat exchange circuit in an embodiment of the present invention.

[0017] In the picture: 1. Chiller unit; 11. Evaporator side; 111. Refrigerant inlet; 112. Refrigerant outlet; 12. Condenser side; 121. Heat exchanger inlet; 122. Heat exchanger outlet; 13. Heat exchanger replenishment pipe; 131. Expansion tank; 132. Heat exchanger replenishment port; 21. Seawater tank; 22. Seawater filter; 23. Seawater pump; 3. Seawater heat exchanger; 4. Heat exchange circulation pump; 41. Water-cooled heat exchanger tube; 42. Water-cooled reflux tube; 43. Air-cooled heat exchanger tube; 44. Air-cooled reflux tube; 51. Water-cooled heat exchanger valve; 52. Water-cooled reflux valve; 53. Air-cooled heat exchanger valve; 54. Air-cooled reflux valve; 6. Air-cooled heat exchanger; 7. Cooling fan; 81. Seawater temperature sensor; 82. Water quality sensor assembly; 83. Air temperature sensor; 84. Air humidity sensor; 85. Wind speed sensor. Detailed Implementation

[0018] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] like Figure 1As shown, this embodiment of the invention provides a ship air conditioning system for regulating the temperature and humidity of relevant cabins on a ship. The ship air conditioning system typically operates in heating, cooling, and ventilation modes depending on changes in ambient temperature. In heating mode, it usually utilizes waste heat recovery from the power system, as well as heat pumps or boilers. Cooling and ventilation are achieved by a chiller unit 1. The heating mode and related equipment and piping of the ship air conditioning system in this embodiment of the invention are not significantly different from those in the prior art, and therefore will not be described again. Specifically, the ship air conditioning system includes a chiller unit 1, a water-cooled heat exchange circuit, an air-cooled heat exchange circuit, a cooling fan 7, and a switching valve assembly. The chiller unit 1 is equipped with a compressor, evaporator, and condenser, which form a refrigeration circuit. Refrigerant flows within the circuit. The condenser side 12 of the chiller unit 1 has a heat exchanger inlet 121 and a heat exchanger outlet 122. The heat exchanger inlet 121 is connected to a heat exchanger replenishment pipe 13, and the heat exchanger outlet 122 is connected to a heat exchange circulation pump 4. Under the pumping action of the heat exchange circulation pump 4, the heat exchanger flows within the condenser and carries away the heat from the refrigerant within the condenser. The evaporator side 11 of the chiller unit 1 has a refrigerant inlet 111 and a refrigerant outlet 112. The refrigerant flows within the evaporator and carries away the cooling capacity of the refrigerant within the evaporator. The refrigerant inlet 111 is connected to the outlet of the terminal device, and the refrigerant outlet 112 is connected to the inlet of the terminal device. The terminal device is located inside the cabin and cools the air supplied to the cabin using the refrigerant. During operation, the compressor draws low-temperature, low-pressure refrigerant vapor from the evaporator and compresses it into high-temperature, high-pressure refrigerant vapor, which is then sent to the condenser. The high-temperature, high-pressure refrigerant vapor condenses into a liquid state under the cooling effect of the heat exchanger in the condenser and returns to the evaporator. In the evaporator, it transfers its cooling capacity to the refrigerant and then becomes low-temperature, low-pressure refrigerant vapor again. In this embodiment, both the refrigerant and the heat exchanger are selected as fresh water or purified water to reduce costs. The marine air conditioning system also includes a water-cooled heat exchange circuit, an air-cooled heat exchange circuit, a cooling fan 7, and a switching valve assembly. Both the water-cooled and air-cooled heat exchange circuits are used to cool the heat exchanger. A seawater heat exchanger 3 is installed on the water-cooled heat exchange circuit. The heat exchange inlet and outlet of the seawater heat exchanger 3 are connected to the outlet of the heat exchange circulation pump 4 and the heat exchanger replenishment pipe 13, respectively. The cooling inlet of the seawater heat exchanger 3 is connected to seawater, and the outlet of the seawater heat exchanger 3 is connected to the ocean. An air-cooled heat exchanger 6 is installed on the air-cooled heat exchange circuit. The heat exchange inlet and outlet of the air-cooled heat exchanger 6 are connected to the outlet of the heat exchange circulation pump 4 and the heat exchanger replenishment pipe 13, respectively. The air outlet of the cooling fan 7 faces the air-cooled heat exchanger 6 and is used to supply air to the air-cooled heat exchanger 6. The switching valve group enables the outlet of the heat exchange circulation pump 4 to selectively connect to the heat exchange inlet of the seawater heat exchanger 3 and / or the heat exchange inlet of the air-cooled heat exchanger 6. That is, the switching valve group can enable cooling by opening the water-cooled heat exchange circuit or the air-cooled heat exchange circuit separately, or it can enable cooling by opening the water-cooled heat exchange circuit and the air-cooled heat exchange circuit simultaneously.

[0023] In this embodiment, the ship's air conditioning system incorporates both water-cooled and air-cooled heat exchange circuits, along with a switching valve assembly. This allows the outlet of the heat exchange circulation pump 4 to selectively connect to the heat exchange inlet of the seawater heat exchanger 3 and / or the heat exchange inlet of the air-cooled heat exchanger 6. This enables the independent activation of either the water-cooled or air-cooled heat exchange circuit for cooling. During ship berthing, the air-cooled heat exchange circuit can be activated independently to meet the cooling needs of the air conditioning system while eliminating the need to draw seawater or connect freshwater, thus conserving freshwater resources at the dock and reducing operating costs. Furthermore, the system can also simultaneously activate both the water-cooled and air-cooled heat exchange circuits for cooling. During navigation, both circuits can operate within their economic power range, reducing overall energy consumption.

[0024] Specifically, the cooling inlet of the seawater heat exchanger 3 is connected to the seawater tank 21. A seawater filter 22 and a seawater pump 23 are sequentially arranged in the flow path between the seawater tank 21 and the seawater heat exchanger 3. The seawater tank 21 is located below the waterline of the ship and has an opening connecting to the ocean. The seawater pump 23 draws seawater from the seawater tank 21. After being filtered by the seawater filter 22, the seawater enters the seawater heat exchanger 3 under the action of the seawater pump 23, cooling the heat exchanger fluid inside the seawater heat exchanger 3, and then is discharged from the seawater heat exchanger 3 to the ocean. The seawater heat exchanger 3 can be a shell-and-tube type, finned type, or plate type; its specific structure is prior art in this field and will not be described in detail here.

[0025] Optionally, the ship's air conditioning system also includes a seawater temperature sensor 81 and a water quality sensor assembly 82. The seawater temperature sensor 81 measures the temperature of the seawater in the seawater tank 21, and the water quality sensor assembly 82 measures the turbidity, suspended solids, and particulate matter content of the seawater in the seawater tank 21. Specifically, the water quality sensor assembly 82 may be two or all of a turbidity sensor, a suspended solids sensor, and an ultrasonic suspended solids concentration meter to meet water quality measurement requirements and prevent excessive levels of suspended solids, particulate matter, or silt in the seawater from causing blockages or increased wear. By setting up the seawater temperature sensor 81 and the water quality sensor assembly 82, the seawater pump 23 can be adaptively started and stopped or its operating power adjusted according to the seawater temperature and water quality conditions to better match cooling requirements.

[0026] Optionally, the ship's air conditioning system also includes an air temperature sensor 83, an air humidity sensor 84, and a wind speed sensor 85. The air temperature sensor 83 measures the air temperature at the air-cooled heat exchanger 6, the air humidity sensor 84 measures the air humidity at the air-cooled heat exchanger 6, and the wind speed sensor 85 measures the wind speed at the air-cooled heat exchanger 6. By measuring the air temperature, humidity, and wind speed at the air-cooled heat exchanger 6, the cooling fan 7 can be adaptively started and stopped or its operating power adjusted according to the ambient temperature to better match cooling requirements. In this embodiment, the chiller unit 1 and the seawater heat exchanger 3 are both located inside the ship's cabins, while the air-cooled heat exchanger 6 and the cooling fan 7 are both located in the open area of ​​the ship's deck to ensure cooling effectiveness.

[0027] Furthermore, the switching valve group includes a water-cooled heat exchange valve 51 and an air-cooled heat exchange valve 53. The water-cooled heat exchange valve 51 is installed in the connecting flow path between the heat exchange circulation pump 4 and the seawater heat exchanger 3, and can open or close the connecting flow path between the heat exchange circulation pump 4 and the seawater heat exchanger 3. The air-cooled heat exchange valve 53 is installed in the connecting flow path between the heat exchange circulation pump 4 and the air-cooled heat exchanger 6, and can open or close the connecting flow path between the heat exchange circulation pump 4 and the air-cooled heat exchanger 6. When the water-cooled heat exchange valve 51 is open and the air-cooled heat exchange valve 53 is closed, the water-cooled heat exchange circuit is open, and seawater is used for cooling. When the water-cooled heat exchange valve 51 is closed and the air-cooled heat exchange valve 53 is open, the air-cooled heat exchange circuit is open, and air is used for cooling. When both the water-cooled heat exchange valve 51 and the air-cooled heat exchange valve 53 are open, both the water-cooled heat exchange circuit and the air-cooled heat exchange circuit are open, and both seawater and air are used for cooling. The flow rate of the heat exchanger entering the water-cooled heat exchange circuit and the air-cooled heat exchange circuit can be changed by adjusting the opening of the water-cooled heat exchange valve 51 and / or the air-cooled heat exchange valve 53.

[0028] Specifically, the water-cooled heat exchange circuit includes a water-cooled heat exchange tube 41 and a water-cooled return pipe 42. The outlet of the heat exchange circulation pump 4 is connected to the heat exchange inlet of the seawater heat exchanger 3 through the water-cooled heat exchange tube 41, and the heat exchange outlet of the seawater heat exchanger 3 is connected to the heat exchanger replenishment pipe 13 through the water-cooled return pipe 42. A water-cooled heat exchange valve 51 is installed on the water-cooled heat exchange tube 41, and a water-cooled return valve 52 is also installed on the water-cooled return pipe 42. The water-cooled return valve 52 is used to open or close the flow path between the heat exchange outlet of the seawater heat exchanger 3 and the heat exchanger replenishment pipe 13. The water-cooled heat exchange valve 51 and the water-cooled return valve 52 are opened or closed simultaneously. The air-cooled heat exchange loop includes an air-cooled heat exchange tube 43 and an air-cooled return pipe 44. The outlet of the heat exchange circulation pump 4 is connected to the heat exchange inlet of the air-cooled heat exchanger 6 through the air-cooled heat exchange tube 43, and the heat exchange outlet of the air-cooled heat exchanger 6 is connected to the heat exchanger replenishment pipe 13 through the air-cooled return pipe 44. An air-cooled heat exchange valve 53 is installed on the air-cooled heat exchange tube 43, and an air-cooled return valve 54 is also installed on the air-cooled return pipe 44. The air-cooled return valve 54 is used to open or close the flow path between the heat exchange outlet of the air-cooled heat exchanger 6 and the heat exchanger replenishment pipe 13. The air-cooled heat exchange valve 53 and the air-cooled return valve 54 are opened or closed simultaneously.

[0029] Specifically, the heat exchanger replenishment pipe 13 is provided with a heat exchanger replenishment port 132 for replenishing or adding heat exchanger. An expansion tank 131 is also connected to the heat exchanger replenishment pipe 13. The expansion tank 131 stores heat exchanger to compensate for pressure and flow fluctuations in the heat exchanger replenishment pipe 13.

[0030] It should be noted that both the refrigerant and the heat exchanger in this embodiment are fresh water or purified water to reduce operating costs. Furthermore, a certain proportion of ethylene glycol is mixed into the fresh water or purified water in the heat exchanger to prevent the fresh water or purified water in the air-cooled heat exchanger 6 located in the open area of ​​the ship's deck from freezing due to low winter temperatures.

[0031] like Figures 2-4 As shown, this embodiment of the invention provides a control method for a ship air conditioning system, used to control the ship air conditioning system in this embodiment. The control method for the ship air conditioning system includes: Determine the operating mode of the ship's air conditioning system; When the ship's air conditioning system is running in ventilation mode, the air-cooled heat exchange circuit is turned on and the cooling fan 7 is turned off; When the ship's air conditioning system is running in cooling mode, the water-cooled heat exchange circuit and / or the air-cooled heat exchange circuit are turned on.

[0032] The specific operating mode of the ship's air conditioning system is determined as follows: The ship's air conditioning system uses various sensors to acquire real-time data on seawater temperature, seawater quality, air temperature, air humidity, and wind speed. The operating mode is determined based on the seawater and air temperatures. When the seawater temperature is >10℃ or the air temperature is >20℃, the ambient temperature is high, and the air conditioning system operates in cooling mode. When the seawater temperature is ≤10℃ and the air temperature is ≤20℃ and ≥14℃, the ambient temperature is moderate, and the air conditioning system operates in ventilation mode. In ventilation mode, the cooling requirement for the heat exchanger is lower; therefore, the air-cooled heat exchange circuit is activated while the cooling fan 7 is turned off. Only the ambient air blowing across the air-cooled radiator cools the heat exchanger, thus reducing energy consumption. In cooling mode, the water-cooled heat exchange circuit and / or the air-cooled heat exchange circuit are activated separately based on environmental conditions to reduce operating energy consumption while meeting the cooling requirements for the heat exchanger.

[0033] Specifically, when the ship's air conditioning system is operating in cooling mode, the water-cooled heat exchange circuit and / or the air-cooled heat exchange circuit are activated, including: If the seawater quality meets the requirements, turn on the water-cooled heat exchange circuit and / or the air-cooled heat exchange circuit. If the seawater quality does not meet the requirements, start the air-cooled heat exchange circuit and turn on the cooling fan 7.

[0034] When the seawater quality in the area where the vessel is located meets the requirements, the water-cooled heat exchange circuit or the air-cooled heat exchange circuit can be activated separately, or both circuits can be activated simultaneously, depending on the environmental conditions. When the seawater quality in the area does not meet the requirements, to avoid clogging or wear on the relevant pipes, only the air-cooled heat exchange circuit should be activated, and the cooling fan 7 should be turned on for cooling. This setup prevents clogging or wear on the pipes due to poor seawater quality.

[0035] Specifically, when the seawater quality meets the requirements, the water-cooled heat exchange circuit and / or the air-cooled heat exchange circuit are activated, which may include: When the heat exchange efficiency of the water-cooled heat exchange circuit is greater than or equal to the heat exchange efficiency of the air-cooled heat exchange circuit, the water-cooled heat exchange circuit is turned on. When the heat exchange efficiency of the air-cooled heat exchange circuit is greater than or equal to that of the water-cooled heat exchange circuit, the air-cooled heat exchange circuit is turned on and the cooling fan 7 is turned on.

[0036] The heat exchange efficiency of the water-cooled and air-cooled heat exchange loops is determined comprehensively based on seawater temperature, air temperature, air humidity, wind speed, power characteristics of seawater pump 23, power characteristics of cooling fan 7, heat exchange efficiency of seawater heat exchanger 3, and heat exchange efficiency of air-cooled heat exchanger 6. For example, calculations can be performed using relevant formulas in existing technologies, or different operating conditions can be pre-calibrated, and the corresponding heat exchange efficiency can be obtained by comparing the actual environment with the calibrated operating conditions. There are various implementation methods, which can be determined according to actual needs and will not be described in detail here. Under the premise of simultaneously meeting the cooling requirements of the heat exchanger, if the energy efficiency of solely operating the water-cooled heat dissipation loop is higher, then the water-cooled heat dissipation loop should be operated alone; otherwise, the air-cooled heat dissipation loop should be operated alone. When the cooling demand of the heat exchanger is high, both the water-cooled and air-cooled heat dissipation loops can be operated simultaneously to ensure that the cooling demand of the heat exchanger is met. Alternatively, both seawater pump 23 and cooling fan 7 can be operated within their respective economic power ranges to reduce energy consumption.

[0037] Furthermore, considering that water-cooled heat exchange loops typically have higher heat exchange efficiency in practical applications, when the heat exchange efficiency of the water-cooled heat exchange loop is greater than or equal to that of the air-cooled heat exchange loop, turning on the water-cooled heat exchange loop also includes: Determine whether the heat exchange power meets the heat exchange requirements of chiller unit 1. If not, open the air-cooled heat exchange circuit and shut down the cooling fan 7. Determine whether the total heat exchange power meets the heat exchange requirements of chiller unit 1. If not, start the air-cooled heat exchange circuit and start the cooling fan 7.

[0038] After starting the water-cooled heat exchange circuit, the seawater pump 23 is adjusted to operate within its economic power range to determine if the heat exchange power meets the heat exchange requirements of the chiller unit 1. If not, the air-cooled heat exchange circuit is started, and the cooling fan 7 is turned off. The opening of the switching valve group is adaptively adjusted to allow some heat exchanger to enter the air-cooled heat exchange circuit for cooling. When the cooling fan 7 is off, the heat exchange power of the air-cooled heat exchange circuit varies under different environmental conditions, determined by air temperature, air humidity, and wind speed. Therefore, the adjustment of the switching valve group opening mainly depends on the current air temperature, air humidity, and wind speed. Specifically, when the air temperature is relatively low, the air humidity is relatively dry, or the wind speed is relatively high, the amount of heat exchanger entering the air-cooled heat exchange circuit can be relatively increased. Similarly, when the air temperature is relatively high, the air humidity is relatively humid, or the wind speed is relatively slow, the amount of heat exchanger entering the air-cooled heat exchange circuit can be relatively reduced. At this time, the air driven by the ambient wind speed is used to cool the heat exchanger in the air-cooled heat exchanger 6, increasing the total heat exchange power without increasing energy consumption. If the total heat exchange power still does not meet the heat exchange requirements of chiller unit 1, then the cooling fan 7 continues to be turned on, and the power of the cooling fan 7 and the opening of the switching valve group are adjusted until the total heat exchange power meets the heat exchange requirements of chiller unit 1. At this time, heat dissipation is carried out through the joint cooling of the water-cooled heat exchange circuit and the air-cooled heat exchange circuit, and the seawater pump 23 can operate within the economic power range, thereby reducing the overall operating energy consumption.

[0039] This invention provides a ship, including the ship air conditioning system described in this embodiment, or a control method for the ship air conditioning system described in this embodiment. By setting up the ship air conditioning system described in this embodiment or applying the control method for the ship air conditioning system described in this embodiment, the ship's demand for fresh water during berthing is reduced, saving resources and operating costs. It can also reduce the energy consumption of the air conditioning system to a certain extent.

[0040] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this invention is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-disclosed concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this invention.

[0041] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A marine air conditioning system, characterized in that, include: The chiller unit (1) has a heat exchanger inlet (121) and a heat exchanger outlet (122) on the condenser side (12). The heat exchanger inlet (121) is connected to the heat exchanger replenishment pipe (13), and the heat exchanger outlet (122) is connected to the inlet of the heat exchange circulation pump (4). A water-cooled heat exchange circuit is provided with a seawater heat exchanger (3). The heat exchange inlet and heat exchange outlet of the seawater heat exchanger (3) are respectively connected to the outlet of the heat exchange circulation pump (4) and the heat exchange agent replenishment pipe (13). The cooling inlet of the seawater heat exchanger (3) is connected to seawater, and the outlet of the seawater heat exchanger (3) is connected to the ocean. The air-cooled heat exchange circuit is provided with an air-cooled heat exchanger (6), and the heat exchange inlet and heat exchange outlet of the air-cooled heat exchanger (6) are respectively connected to the outlet of the heat exchange circulation pump (4) and the heat exchange agent replenishment pipe (13). Cooling fan (7), with air outlet facing the air-cooled heat exchanger (6); The switching valve group enables the outlet of the heat exchange circulation pump (4) to be selectively connected to the heat exchange inlet of the seawater heat exchanger (3) and / or the heat exchange inlet of the air-cooled heat exchanger (6).

2. The ship air conditioning system according to claim 1, characterized in that, The cooling inlet of the seawater heat exchanger (3) is connected to the seawater tank (21), and a seawater filter (22) and a seawater pump (23) are sequentially arranged in the flow path between the seawater tank (21) and the seawater heat exchanger (3).

3. The ship air conditioning system according to claim 2, characterized in that, It also includes a seawater temperature sensor (81) and a water quality sensor assembly (82). The seawater temperature sensor (81) is used to measure the temperature of the seawater in the seawater tank (21), and the water quality sensor assembly (82) is used to measure the turbidity, suspended solids and particulate matter content of the seawater in the seawater tank (21).

4. The ship air conditioning system according to claim 1, characterized in that, It also includes an air temperature sensor (83), an air humidity sensor (84), and a wind speed sensor (85). The air temperature sensor (83) is used to measure the air temperature at the air-cooled heat exchanger (6), the air humidity sensor (84) is used to measure the air humidity at the air-cooled heat exchanger (6), and the wind speed sensor (85) is used to measure the wind speed at the air-cooled heat exchanger (6).

5. The ship air conditioning system according to claim 1, characterized in that, The switching valve group includes a water-cooled heat exchange valve (51) and an air-cooled heat exchange valve (53). The water-cooled heat exchange valve (51) is located in the communication flow path between the heat exchange circulation pump (4) and the seawater heat exchanger (3), and can open or close the communication flow path between the heat exchange circulation pump (4) and the seawater heat exchanger (3). The air-cooled heat exchange valve (53) is located in the communication flow path between the heat exchange circulation pump (4) and the air-cooled heat exchanger (6), and can open or close the communication flow path between the heat exchange circulation pump (4) and the air-cooled heat exchanger (6).

6. A control method for a ship's air conditioning system, characterized in that, The method for controlling the ship air conditioning system according to any one of claims 1-5 includes: Determine the operating mode of the ship's air conditioning system; When the ship's air conditioning system is running in ventilation mode, the air-cooled heat exchange circuit is turned on and the cooling fan is turned off (7). When the ship's air conditioning system is running in cooling mode, the water-cooled heat exchange circuit and / or the air-cooled heat exchange circuit are turned on.

7. The control method for a ship air conditioning system according to claim 6, characterized in that, When the ship's air conditioning system is operating in cooling mode, activating the water-cooled heat exchange circuit and / or the air-cooled heat exchange circuit includes: If the seawater quality meets the requirements, turn on the water-cooled heat exchange circuit and / or the air-cooled heat exchange circuit. If the seawater quality does not meet the requirements, start the air-cooled heat exchange circuit and start the cooling fan (7).

8. The control method for a ship air conditioning system according to claim 7, characterized in that, When the seawater quality meets the requirements, the activation of the water-cooled heat exchange circuit and / or the air-cooled heat exchange circuit includes: When the heat exchange efficiency of the water-cooled heat exchange circuit is greater than or equal to the heat exchange efficiency of the air-cooled heat exchange circuit, the water-cooled heat exchange circuit is turned on. When the heat exchange efficiency of the air-cooled heat exchange circuit is greater than or equal to that of the water-cooled heat exchange circuit, the air-cooled heat exchange circuit is turned on and the cooling fan is turned on (7).

9. The control method for a ship air conditioning system according to claim 8, characterized in that, When the heat exchange efficiency of the water-cooled heat exchange loop is greater than or equal to that of the air-cooled heat exchange loop, after turning on the water-cooled heat exchange loop, the following are also included: Determine whether the heat exchange power meets the heat exchange requirements of the chiller unit (1). If not, open the air-cooled heat exchange circuit and close the cooling fan (7). Determine whether the total heat exchange power meets the heat exchange requirements of the chiller unit (1). If not, open the air-cooled heat exchange circuit and turn on the cooling fan (7).

10. A ship, characterized in that, Includes the ship air conditioning system according to any one of claims 1-5, or applies the control method of the ship air conditioning system according to any one of claims 6-9.

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