Ship waste heat recovery system and control method

Abstract

The invention provides a ship waste heat recovery system and a control method. The ship waste heat recovery system comprises an engine room monitoring system, a first cooling water system corresponding to a first engine room, a second cooling water system corresponding to a second engine room and a waste heat recovery system. A water inlet pipe of the waste heat recovery system is connected with a water outlet pipe of the first cooling water system and a water outlet pipe of the second cooling water system through a first three-way remote control valve, and a water outlet pipe of the waste heat recovery system is connected with a water inlet pipe of the first cooling water system and a water inlet pipe of the second cooling water system through a second three-way remote control valve. The first three-way remote control valve and the second three-way remote control valve are interlocked, the cabin monitoring system is in communication connection with the first three-way remote control valve or the second three-way remote control valve, the cabin monitoring system and the two three-way remote control valves are introduced for a double-cabin ship, waste heat recovery of double cabins can be automatically controlled, the workload of sailors is effectively reduced, and the working efficiency is improved. And the automation degree of the system is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of ship design, and particularly relates to a ship waste heat recovery system and a control method. Background Art

[0002] At present, a waste heat recovery system is equipped on ships. The heat source utilized by this system is the waste heat carried by the engine room cooling water after being heated by the cooling equipment. The entire system operates continuously. In actual operation, when engine room 1 is enabled, the heat energy recovery system needs to be connected to the high-temperature cooling water of engine room 1; when engine room 2 is enabled, the heat energy recovery system needs to be connected to the high-temperature cooling water of engine room 2. The connection of the high-temperature cooling water is achieved by manually operating a three-way valve.

[0003] However, the crew needs to go to the site to manually switch the cooling water systems of engine room 1 and engine room 2. This operation increases the workload of the crew. Moreover, in the field of modern ships where the requirement for automation is increasing day by day, this manual operation method cannot meet the development trend of ship automation and appears relatively backward. Summary of the Invention

[0004] In a first aspect, an embodiment of the present invention provides a ship waste heat recovery system, including an engine room monitoring system, a first cooling water system corresponding to a first engine room, a second cooling water system corresponding to a second engine room, and a waste heat recovery system; the water inlet pipe of the waste heat recovery system is connected to the water outlet pipes of the first cooling water system and the second cooling water system through a first three-way remote control valve, the water outlet pipe of the waste heat recovery system is connected to the water inlet pipes of the first cooling water system and the second cooling water system through a second three-way remote control valve, the first three-way remote control valve and the second three-way remote control valve are interlocked, and the engine room monitoring system is communicatively connected to the first three-way remote control valve or the second three-way remote control valve.

[0005] In some embodiments, it further includes a hot water heater corresponding to each functional cabin. The water inlet pipe of each hot water heater is connected to the water outlet pipe of the waste heat recovery system through a temperature control valve, the water outlet pipe of the hot water heater is connected to the water inlet pipe of the waste heat recovery system, a temperature sensor is provided on the temperature control valve, and the temperature sensor is located inside the functional cabin.

[0006] In a second aspect, the present invention provides a control method for a ship waste heat recovery system, which is applied to the ship waste heat recovery system according to any item in the first aspect. The method includes: based on the engine room monitoring system monitoring the operation signals of the first engine room and the second engine room, and controlling the first three-way remote control valve and the second three-way remote control valve to perform corresponding actions according to the monitored operation signals; in the case where the first three-way remote control valve and the second three-way remote control valve perform corresponding actions, the first cooling water system or the second cooling water system conveys high-temperature cooling water to the waste heat recovery system.

[0007] In some embodiments, controlling the opening and closing of the three-way remote control valves corresponding to each cooling water system according to the monitored operation signals includes: when the operation signal of one of the engine rooms is monitored, controlling the three-way remote control valve corresponding to the one engine room to open, and closing the three-way remote control valves corresponding to other engine rooms.

[0008] In some embodiments, controlling the first three-way remote control valve and the second three-way remote control valve to perform corresponding actions according to the monitored operation signals includes: when the operation signal of the first engine room is monitored, controlling the first three-way remote control valve and the second three-way remote control valve to turn towards the first engine room, and cutting off the second cooling water system.

[0009] In some embodiments, controlling the first three-way remote control valve and the second three-way remote control valve to perform corresponding actions according to the monitored operation signals includes: when the operation signal of the second engine room is monitored, controlling the first three-way remote control valve and the second three-way remote control valve to turn towards the second engine room, and cutting off the first cooling water system.

[0010] In some embodiments, controlling the first three-way remote control valve and the second three-way remote control valve to perform corresponding actions according to the monitored operation signals includes: when the operation signals of the first engine room and the second engine room are monitored, controlling the first three-way remote control valve and the second three-way remote control valve to turn towards the first engine room, and cutting off the second cooling water system.

[0011] In some embodiments, controlling the first three-way remote control valve and the second three-way remote control valve to perform corresponding actions according to the monitored operation signals includes: when the operation signals of the first engine room and the second engine room are monitored, controlling the first three-way remote control valve and the second three-way remote control valve to turn towards the second engine room, and cutting off the first cooling water system.

[0012] In some embodiments, the ship waste heat recovery system further includes a hot water heater corresponding to each functional cabin. A temperature control valve is provided between each hot water heater and the waste heat recovery system. A temperature sensor is provided on the temperature control valve, and the temperature sensor is located in the functional cabin; the method further includes: collecting the temperature of the corresponding functional cabin based on the temperature sensor, and controlling the opening and closing of the temperature control valve corresponding to the hot water heater of the corresponding functional cabin according to the temperature.

[0013] In some embodiments, controlling the opening and closing of the temperature control valve corresponding to the hot water heater of the corresponding functional cabin according to the temperature includes: when the temperature is lower than a first preset threshold, controlling the temperature control valve corresponding to the hot water heater of the corresponding functional cabin to open.

[0014] In some embodiments, controlling the opening and closing of the temperature control valve corresponding to the hot water heater of the corresponding functional compartment according to temperature includes: when the temperature is higher than the second preset threshold, controlling the temperature control valve corresponding to the hot water heater of the corresponding functional compartment to close.

[0015] The beneficial effects brought by the present invention are as follows:

[0016] As can be seen from the above solution, the embodiments of the present invention provide a ship waste heat recovery system and a control method. For a double-engine room ship, an engine room monitoring system and two three-way remote control valves are introduced. The engine room monitoring system can automatically control the actions of the two three-way remote control valves, and then control the cooling water system to provide heat energy for the waste heat recovery system. The whole process does not require crew members to manually operate on-site. The crew only needs to pay attention to the operation status of the system in the monitoring room, which greatly reduces the workload of the crew and improves the automation degree of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a ship waste heat recovery system provided by an embodiment of the present invention;

[0018] Figure 2 It is a schematic structural diagram of another ship waste heat recovery system provided by an embodiment of the present invention;

[0019] Figure 3 It is a schematic flow chart of a control method for a ship waste heat recovery system provided by an embodiment of the present invention;

[0020] Figure 4 It is a schematic flow chart of another control method for a ship waste heat recovery system provided by an embodiment of the present invention;

[0021] Figure 5 It is a schematic flow chart of still another control method for a ship waste heat recovery system provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Figure 1 It is a schematic structural diagram of a ship waste heat recovery system provided by an embodiment of the present invention. As Figure 1As shown in the figure, the ship waste heat recovery system includes an engine room monitoring system, a first cooling water system corresponding to the first engine room, a second cooling water system corresponding to the second engine room, and a waste heat recovery system;

[0024] The inlet pipe of the waste heat recovery system is connected to the outlet pipes of the first cooling water system and the second cooling water system through a first three-way remote control valve. The outlet pipe of the waste heat recovery system is connected to the inlet pipes of the first cooling water system and the second cooling water system through a second three-way remote control valve. The first three-way remote control valve and the second three-way remote control valve are interlocked, and the engine room monitoring system is communicatively connected to the first three-way remote control valve or the second three-way remote control valve.

[0025] Specifically, a ship may have a single engine room or a double engine room. This embodiment is for a double engine room, such as Figure 1 Engine Room 1 and Engine Room 2 in the figure. The engine room, as the core area of the ship, houses the power plant and important mechanical equipment of the ship. Equipment such as the main engine, generator, and various pumps of the ship are installed here. To ensure the safe and stable operation of the equipment in the engine room, each engine room is correspondingly provided with an independent cooling water system, such as Figure 1 Cooling Water System 1 corresponding to Engine Room 1 in the figure, and Cooling Water System 2 corresponding to Engine Room 2. The fluid in the cooling water system is usually fresh water.

[0026] The inlet pipe of the waste heat recovery system is connected to the outlet pipes of Cooling Water System 1 and Cooling Water System 2 through the three-way remote control valve V1-1. The outlet pipe of the waste heat recovery system is connected to the inlet pipes of Cooling Water System 1 and Cooling Water System 2 through the three-way remote control valve V1-2; Valves V1-1 and V1-2 have an interlocking function, that is, after one valve receives a control signal and operates, the other valve will also operate synchronously.

[0027] The engine room monitoring system will monitor the working status of Engine Room 1 and Engine Room 2 in real time. When the operating signal of the main engine in a certain engine room is detected, it indicates that the equipment in this engine room is in operation, and the corresponding cooling water system is also working, generating a large amount of heat energy. At this time, the engine room monitoring system will send an action signal to V1-1 or V1-2, or V1-1 and V1-2. At this time, V1-1 and V1-2 will simultaneously turn to Cooling Water System 1 or Cooling Water System 2, and the high-temperature cooling water output by Cooling Water System 1 or Cooling Water System 2 will smoothly enter the waste heat recovery system without mixing.

[0028] For example, when it is detected that Engine Room 1 is operating, valves V1-1 and V1-2 will simultaneously turn to Cooling Water System 1, cutting off Cooling Water System 2. At this time, the high-temperature cooling water output from the outlet pipe of Cooling Water System 1 passes through V1-1 and enters the waste heat recovery system, and then returns to Cooling Water System 1 through the outlet pipe of the waste heat recovery system and V1-2.

[0029] For another example, when it is detected that the engine room 2 is operating, the valves V1-1 and V1-2 will simultaneously turn to the cooling water system 2, cutting off the cooling water system 1. At this time, the high-temperature cooling water output from the outlet pipe of the cooling water system 2 enters the waste heat recovery system through V1-1, and then flows back to the cooling water system 2 through the outlet pipe of the waste heat recovery system and V1-2.

[0030] Figure 2 It is a schematic structural diagram of another ship waste heat recovery system provided by an embodiment of the present invention. As Figure 2 shown, the ship waste heat recovery system further includes a hot water heater corresponding to each functional cabin. The inlet pipe of each hot water heater is connected to the outlet pipe of the waste heat recovery system through a temperature control valve. The outlet pipe of the hot water heater is connected to the inlet pipe of the waste heat recovery system. A temperature sensor is provided on the temperature control valve, and the temperature sensor is located in the functional cabin.

[0031] Specifically, a functional cabin is a space on a ship with various different functions and can be divided into various types according to its use, such as a living cabin, a storage cabin, a cockpit, a cargo hold, etc. The temperature of each functional cabin usually needs to be stabilized within a certain range. In the traditional temperature regulation method, when the temperature in the cabin room is relatively low, the staff needs to go to the corresponding room in person to manually turn on the hot water heater to heat the cabin; when the room temperature reaches normal temperature, the hot water heater needs to be manually turned off again. This way of manually turning on and off the hot water heater no longer meets the increasing requirements of modern ships for the degree of automation.

[0032] In this embodiment, each functional cabin is equipped with a hot water heater, and the inlet pipe of each hot water heater is connected to the outlet pipe of the waste heat recovery system. A temperature control valve V2-1 is configured on the pipeline of each hot water heater, and a temperature sensor T3-1 is provided on the temperature control valve. The temperature sensor T3-1 is arranged inside the functional cabin room and can monitor the room temperature in real time and control the opening and closing of the temperature control valve V2-1 according to the monitored temperature, so as to realize the automatic regulation of the temperature of the corresponding cabin.

[0033] The ship waste heat recovery system provided by this embodiment, for a double-engine room ship, introduces an engine room monitoring system and two three-way remote control valves. The engine room monitoring system can automatically control the actions of the two three-way remote control valves, and then control the cooling water system to provide heat energy for the waste heat recovery system. The whole process does not require the crew to manually operate on site. The crew only needs to pay attention to the operation status of the system in the monitoring room, which greatly reduces the workload of the crew. In addition, by introducing a temperature control valve and a temperature sensor, the automatic regulation of the temperature of the functional cabin by using the waste heat recovery system is realized, and the automation degree of the system is improved.

[0034] Figure 3 The flowchart of a control method for a ship waste heat recovery system provided by an embodiment of the present invention is applied to Figure 1 or Figure 2 the ship waste heat recovery system shown in Figure 3 As shown, the control method includes:

[0035] Step S301: Based on the operation signals of the first engine room and the second engine room monitored by the engine room monitoring system, control the first three-way remote control valve and the second three-way remote control valve to perform corresponding actions according to the monitored operation signals.

[0036] Specifically, the engine room monitoring system plays a key role of "intelligent brain" in the ship waste heat recovery system. For a ship with double engine rooms, such as Engine Room 1 and Engine Room 2, a large number of power devices and important mechanical equipment are installed in each engine room, such as main engines, generators, various pumps, etc. These devices will generate various operation signals during operation, such as the start, stop, and speed change of the main engine, the output power signal of the generator, etc. The primary task of the engine room monitoring system is to monitor these operation signals in real time and accurately.

[0037] When the equipment in the engine room starts to operate, corresponding electrical signals, mechanical signals, etc. will be generated. The engine room monitoring system captures these signals through various sensors distributed in the engine room (such as temperature sensors, pressure sensors, speed sensors, etc.). For example, when the main engine starts, the speed sensor will detect the speed change of the main engine and transmit this signal to the engine room monitoring system. The engine room monitoring system analyzes and processes these signals to determine the actual operation state of each engine room. Once the engine room monitoring system determines that a certain engine room is in an operating state, it means that the equipment in this engine room is generating heat, and its corresponding cooling water system is also working and carrying a large amount of heat energy. At this time, the engine room monitoring system will send action signals to the two three-way remote control valves according to the preset control logic.

[0038] Step S302: When the first three-way remote control valve and the second three-way remote control valve perform corresponding actions, the first cooling water system or the second cooling water system conveys high-temperature cooling water to the waste heat recovery system.

[0039] Specifically, each engine room is equipped with an independent cooling water system, whose main function is to cool down the equipment in the engine room to ensure that the equipment operates within a safe temperature range. During the operation of the equipment, the cooling water continuously absorbs the heat generated by the equipment, and the temperature gradually rises, thus becoming high-temperature cooling water.

[0040] After the engine room monitoring system controls the actions of two three-way remote control valves according to the operating signals of the engine room, the connected cooling water system begins to function. Taking engine room 1 as an example, when V1-1 and V1-2 turn to the cooling water system 1 and the cooling water system 2 is cut off, the high-temperature cooling water in the cooling water system 1 of engine room 1, under the push of the system pressure, flows along the outlet pipe of the cooling water system 1, V1-1, and the inlet pipe of the waste heat recovery system to the waste heat recovery system, and then returns to the cooling water system 1 through the outlet pipe of the waste heat recovery system, V1-2, and the inlet pipe of the cooling water system 1.

[0041] Once the high-temperature cooling water enters the waste heat recovery system, the system will recover and utilize this heat, such as heating the hot water in the functional cabins on the ship and providing energy for living facilities, etc., so as to achieve the efficient recovery and reuse of the ship's waste heat, improve the energy utilization efficiency of the ship, and reduce energy consumption and operating costs.

[0042] The control method of the ship waste heat recovery system provided in this embodiment, for a double engine room, can automatically monitor the operating signals of the double engine room through the engine room monitoring system, and automatically control the actions of two three-way remote control valves according to the monitored operating signals, and then control one of the cooling water systems to provide heat energy for the waste heat recovery system. The whole process does not require the crew to operate manually on site. The crew only needs to pay attention to the operating status of the system in the monitoring room, which greatly reduces the workload of the crew.

[0043] On the basis of the foregoing embodiment, Figure 4 is a schematic flow chart of another control method of the ship waste heat recovery system provided by an embodiment of the present invention. As Figure 4 shown, the control method includes:

[0044] Step S401: Monitor the operating signals of the first engine room and the second engine room based on the engine room monitoring system.

[0045] Step S402: When the operating signal of the first engine room is monitored, control the first three-way remote control valve and the second three-way remote control valve to turn to the first engine room and cut off the second cooling water system.

[0046] Step S403: When the operating signal of the second engine room is monitored, control the first three-way remote control valve and the second three-way remote control valve to turn to the second engine room and cut off the first cooling water system.

[0047] Step S404: When the operating signals of the first engine room and the second engine room are monitored, control the first three-way remote control valve and the second three-way remote control valve to turn to the first engine room and cut off the second cooling water system, or control the first three-way remote control valve and the second three-way remote control valve to turn to the second engine room and cut off the first cooling water system.

[0048] Step S405: When the first three-way remote control valve and the second three-way remote control valve perform corresponding actions, the first cooling water system or the second cooling water system conveys high-temperature cooling water to the waste heat recovery system.

[0049] It should be noted that Step S401 and Step S405 in this embodiment are similar to the implementation manners of "monitoring the operation signals of the first engine room and the second engine room based on the engine room monitoring system" in Step S301 and Step S302 in the foregoing embodiment respectively, and will not be elaborated here.

[0050] The difference from the foregoing embodiment is that this embodiment further defines the specific control logic of the engine room monitoring system for the actions of the two three-way remote control valves. In this embodiment, when the operation signal of the first engine room is monitored, the first three-way remote control valve and the second three-way remote control valve are controlled to turn to the first engine room, and the second cooling water system is cut off; when the operation signal of the second engine room is monitored, the first three-way remote control valve and the second three-way remote control valve are controlled to turn to the second engine room, and the first cooling water system is cut off; when the operation signals of the first engine room and the second engine room are monitored, the first three-way remote control valve and the second three-way remote control valve are controlled to turn to the first engine room, and the second cooling water system is cut off, or the first three-way remote control valve and the second three-way remote control valve are controlled to turn to the second engine room, and the first cooling water system is cut off.

[0051] Specifically, taking Figure 1 the double engine room as an example, valves V1-1 and V1-2 have an interlocking function and can act simultaneously. When the engine room monitoring system monitors the operation signal of the main engine in engine room 1, valves V1-1 and V1-2 switch to the cooling water system of engine room 1, cutting off the cooling water supply to engine room 2; when the engine room monitoring system monitors the operation signal of the main engine in engine room 2, valves V1-1 and V1-2 switch to the cooling water system of engine room 2, cutting off the cooling water supply to engine room 1; when the main engines in engine room 1 and engine room 2 are running simultaneously, valves V1-1 and V1-2 switch to the cooling water system of engine room 1, cutting off the cooling water supply to engine room 2, or valves V1-1 and V1-2 switch to the cooling water system of engine room 2, cutting off the cooling water supply to engine room 1, so as to ensure that there is no mixing of the two cooling systems.

[0052] Based on the foregoing embodiment, regardless of whether it is a single engine room operation or a double engine room operation, the engine room monitoring system ensures that only one cooling water system conveys high-temperature cooling water to the waste heat recovery system by controlling the two three-way remote control valves. This measure ensures that there is no mixing between the cooling water systems, effectively reducing the risk of damage to the waste heat recovery system caused by problems in the cooling water system.

[0053] Based on the foregoing embodiment, Figure 5The flowchart shows another control method for the ship waste heat recovery system provided by the embodiments of the present invention, which is applied to the ship waste heat recovery system as shown in Figure 2 below. As shown in Figure 5 below, the control method includes:

[0054] Step S501: Based on the operation signals of the first engine room and the second engine room monitored by the engine room monitoring system, control the first three-way remote control valve and the second three-way remote control valve to perform corresponding actions according to the monitored operation signals.

[0055] Step S502: When the first three-way remote control valve and the second three-way remote control valve perform corresponding actions, the first cooling water system or the second cooling water system conveys high-temperature cooling water to the waste heat recovery system.

[0056] Step S503: Based on the temperature sensors, collect the temperatures of the corresponding functional cabins, and control the opening and closing of the temperature control valves corresponding to the hot water heaters in the corresponding functional cabins according to the temperatures.

[0057] It should be noted that the implementation manners of steps S501 and S502 in this embodiment are similar to those of steps S301 and S302 in the foregoing embodiments respectively, and will not be elaborated here.

[0058] The difference from the foregoing embodiments is that this embodiment further defines how to automatically adjust the temperature of the ship functional cabins by using the waste heat recovery system. In this embodiment, based on the temperature sensors, collect the temperatures of the corresponding functional cabins, and control the opening and closing of the temperature control valves corresponding to the hot water heaters in the corresponding functional cabins according to the temperatures.

[0059] Specifically, the temperature sensors are installed in the functional cabins and can automatically collect the temperature data of the functional cabins in real time. According to the collected temperature data, the opening or closing of the temperature control valves between the waste heat recovery system and the hot water heaters can be controlled, so as to realize the flow of the heat energy in the waste heat recovery system to the hot water heaters to heat the functional cabins. After heating, the water then enters the waste heat recovery system through the outlet pipe of the hot water heater and the inlet pipe of the waste heat recovery system; or cut off the flow of the heat energy in the waste heat recovery system to the hot water heaters to stop heating.

[0060] In some embodiments, step S503 includes: when the temperature is lower than the first preset threshold, control the opening of the temperature control valve corresponding to the hot water heater in the corresponding functional cabin; when the temperature is higher than the second preset threshold, control the closing of the temperature control valve corresponding to the hot water heater in the corresponding functional cabin.

[0061] Specifically, the temperature sensor T3-1 can monitor the room temperature in real time. When the room temperature is lower than 5°C, the temperature control valve V2-1 opens, and hot water flows into the hot water heater to make it start working, continuously providing heat for the room to heat it; when the room temperature is higher than 20°C, the temperature control valve V2-1 closes, and the hot water heater stops working. Similarly, the hot water heaters in each room on the ship are equipped with temperature control valves and temperature sensors to ensure that the temperature in each room on the ship can be automatically adjusted.

[0062] On the basis of the foregoing embodiments, by introducing a temperature control valve and a temperature sensor, the automatic adjustment of the temperature of the ship's cabin by the ship's waste heat recovery system is realized, significantly improving the automation level of the ship.

[0063] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0064] The above is the preferred implementation manner of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A ship waste heat recovery system, characterized in that: It includes a cabin monitoring system, a first cooling water system corresponding to the first cabin, a second cooling water system corresponding to the second cabin, and a waste heat recovery system; The water inlet pipe of the waste heat recovery system is connected to the water outlet pipe of the first cooling water system and the water outlet pipe of the second cooling water system through a first three-way remote control valve, and the water outlet pipe of the waste heat recovery system is connected to the water inlet pipe of the first cooling water system and the water inlet pipe of the second cooling water system through a second three-way remote control valve. The first three-way remote control valve and the second three-way remote control valve are interlocked, and the cabin monitoring system is communicatively connected to the first three-way remote control valve or the second three-way remote control valve.

2. The ship waste heat recovery system according to claim 1, characterized in that: It also includes a hot water heater corresponding to each functional compartment, the water inlet pipe of each hot water heater is connected to the water outlet pipe of the waste heat recovery system through a temperature control valve, the water outlet pipe of the hot water heater is connected to the water inlet pipe of the waste heat recovery system, a temperature sensor is arranged on the temperature control valve, and the temperature sensor is located in the functional compartment.

3. A control method for a ship waste heat recovery system, characterized in that: Applied to the ship waste heat recovery system according to claim 1 or 2, the method comprises: Based on the cabin monitoring system, the operating signals of the first cabin and the second cabin are monitored, and the first three-way remote control valve and the second three-way remote control valve are controlled to perform corresponding actions according to the monitored operating signals; When the first three-way remote control valve and the second three-way remote control valve perform corresponding actions, the first cooling water system or the second cooling water system delivers high-temperature cooling water to the waste heat recovery system.

4. The control method according to claim 3, characterized in that: The controlling the first three-way remote control valve and the second three-way remote control valve to perform corresponding actions according to the monitored operation signal comprises: When the operation signal of the first nacelle is monitored, the first three-way remote control valve and the second three-way remote control valve are controlled to turn to the first nacelle to cut off the second cooling water system.

5. The control method according to claim 3, characterized in that: The controlling the first three-way remote control valve and the second three-way remote control valve to perform corresponding actions according to the monitored operation signal comprises: When the operation signal of the second nacelle is monitored, the first three-way remote control valve and the second three-way remote control valve are controlled to turn to the second nacelle to cut off the first cooling water system.

6. The control method according to claim 3, characterized in that: The controlling the first three-way remote control valve and the second three-way remote control valve to perform corresponding actions according to the monitored operation signal comprises: When the operation signals of the first and second engine rooms are monitored, the first three-way remote control valve and the second three-way remote control valve are controlled to turn to the first engine room to cut off the second cooling water system.

7. The control method according to claim 3, characterized in that: The controlling the first three-way remote control valve and the second three-way remote control valve to perform corresponding actions according to the monitored operation signal comprises: When the operation signals of the first and second engine rooms are monitored, the first three-way remote control valve and the second three-way remote control valve are controlled to turn to the second engine room to cut off the first cooling water system.

8. The control method according to any one of claims 3 to 7, characterized in that: The ship waste heat recovery system further includes a hot water heater corresponding to each functional compartment, a temperature control valve is arranged between each hot water heater and the waste heat recovery system, a temperature sensor is arranged on the temperature control valve, and the temperature sensor is located in the functional compartment; the method further includes: The temperature of the corresponding functional compartment is collected based on the temperature sensor, and the opening and closing of the temperature control valve corresponding to the hot water heater of the corresponding functional compartment is controlled according to the temperature.

9. The control method according to claim 8, characterized in that: The method of controlling the opening and closing of the temperature control valve corresponding to the hot water heater of the corresponding functional compartment according to the temperature includes: When the temperature is lower than the first preset threshold, the temperature control valve corresponding to the hot water heater of the corresponding functional compartment is controlled to open.

10. The control method according to claim 8, characterized in that: The method of controlling the opening and closing of the temperature control valve corresponding to the hot water heater of the corresponding functional compartment according to the temperature includes: When the temperature is higher than the second preset threshold, the temperature control valve corresponding to the hot water heater of the corresponding functional compartment is controlled to be closed.

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