Waste heat recovery system and waste heat recovery method

Abstract

The application provides a waste heat recovery system and a waste heat recovery method, the waste heat recovery system is located on a ship, and the system comprises: a heat conversion device, used for receiving a heating medium generated by an energy conversion equipment, and transferring heat of the heating medium to a target medium; an energy use system, which is in a first communication path with the heat conversion device, used for receiving the target medium from the heat conversion device, and using heat energy of the target medium; a thermal energy storage module, which is in a second communication path with the heat conversion device, used for receiving the target medium from the heat conversion device, and storing energy of the target medium; and an intelligent control module, used for connecting the second communication path when it is determined that a heat generation rate of the heat conversion device exceeds a heat demand rate of the energy use system, and storing the energy of the target medium received from the heat conversion device through the thermal energy storage module. The application realizes recycling of waste gas waste heat, and improves energy utilization efficiency and economy.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ships, in particular, to a waste heat recovery system and a waste heat recovery method. BACKGROUND

[0002] A large amount of high-temperature exhaust gas is generated during the operation of a ship engine (especially a diesel engine).

[0003] The current common practice is to directly discharge the high-temperature exhaust gas to the atmosphere, which causes energy waste. SUMMARY

[0004] Embodiments of the present application provide a waste heat recovery system and a waste heat recovery method, thereby at least to some extent, the waste heat in the exhaust gas can be recovered and utilized, energy waste is reduced, and energy can be stored when the energy demand is low, thereby improving the energy utilization efficiency and economy.

[0005] Other features and advantages of the present application will become apparent from the following detailed description, or will be learned by practice of the present application.

[0006] According to an aspect of an embodiment of the present application, a waste heat recovery system is provided, the system is located on a ship, and the system comprises: a heat conversion device configured to receive a heating medium generated by an energy conversion device during operation and to transfer heat of the heating medium to a target medium; an energy use system configured to receive the target medium from the heat conversion device via a first communication path between the heat conversion device and the energy use system and to use heat energy carried by the target medium; a thermal energy storage module configured to receive the target medium from the heat conversion device via a second communication path between the heat conversion device and the thermal energy storage module and to store energy of the target medium; and an intelligent control module configured to, when it is determined that a heat generation rate of the heat conversion device exceeds a heat demand rate of the energy use system, connect the second communication path to store energy of the target medium received from the heat conversion device via the thermal energy storage module.

[0007] Optionally, based on the foregoing scheme, the thermal energy storage module is physically connected to the energy use system, and the intelligent control module is further configured to, when it is determined that the heat generation rate of the heat conversion device cannot reach the heat demand rate of the energy use system, disconnect the second communication path between the heat conversion device and the thermal energy storage module and connect the physical connection between the energy use system and the thermal energy storage module to provide energy for the energy use system via the thermal energy storage module alone or to provide energy for the energy use system via the heat conversion device and the thermal energy storage module jointly.

[0008] Optionally, based on the foregoing solution, the thermal energy storage module is configured to convert energy of the target medium into electric energy and store the electric energy; the physical connection is an electrical connection, and the energy utilization system is further configured to use the electric energy provided by the thermal energy storage module when a heat generation rate of the heat conversion device cannot reach a heat demand rate of the energy utilization system.

[0009] Optionally, based on the foregoing solution, further comprising a waste heat recovery heat exchanger, and a third communication path is provided between the waste heat recovery heat exchanger and the heat conversion device; the intelligent control module is further configured to: when it is determined that the heat generation rate of the heat conversion device exceeds the heat demand rate of the energy utilization system, and a difference between the heat generation rate and the heat demand rate of the energy utilization system is greater than a maximum energy storage rate of the thermal energy storage module, connect the second communication path and the third communication path to store energy by the thermal energy storage module and collect heat by the waste heat recovery heat exchanger.

[0010] Optionally, based on the foregoing solution, a first control valve is arranged on the third communication path, and the intelligent control module is further configured to: when the difference between the heat generation rate and the heat demand rate of the energy utilization system is greater than the maximum energy storage rate of the thermal energy storage module, determine a first opening degree of the first control valve according to the difference between the heat generation rate and the heat demand rate of the energy utilization system, and adjust the opening degree of the first control valve to the first opening degree to control a flow rate of the third communication path by the first control valve.

[0011] Optionally, based on the foregoing solution, the intelligent control module is further configured to: when it is determined that the heat generation rate of the heat conversion device exceeds the heat demand rate of the energy utilization system, but the difference between the heat generation rate and the heat demand rate of the energy utilization system does not exceed the maximum energy storage rate of the thermal energy storage module, connect the second communication path and make the third communication path in a cut-off state to store energy by the thermal energy storage module.

[0012] Optionally, based on the foregoing solution, a second control valve is arranged on the second communication path, and the intelligent control module is further configured to: when it is determined that the heat generation rate of the heat conversion device exceeds the heat demand rate of the energy utilization system, but the difference between the heat generation rate and the heat demand rate of the energy utilization system does not exceed the maximum energy storage rate of the thermal energy storage module, determine a second opening degree of the second control valve according to the difference between the heat generation rate and the heat demand rate of the energy utilization system, and adjust the opening degree of the second control valve to the second opening degree.

[0013] Optionally, based on the foregoing scheme, the heat generation rate is determined according to at least one of the following data: the load of the energy conversion device, the temperature of the heating medium, the state of the energy conversion device; the heat demand rate of the energy using system is determined according to at least one of the following data: the flow of the medium in the energy using system, the temperature of the medium in the energy using system, the pressure of the medium in the energy using system.

[0014] Optionally, based on the foregoing scheme, the intelligent control module is further configured to: obtain an expected heat demand rate of the energy using system and an expected heat generation rate of the heat conversion device; determine a first expected opening degree of the first control valve and / or a second expected opening degree of the second control valve according to the expected heat demand rate and the expected heat generation rate; adjust the opening degree of the first control valve to the direction of the first expected opening degree; and / or, adjust the opening degree of the second control valve to the direction of the second expected opening degree.

[0015] Optionally, based on the foregoing scheme, the expected heat demand rate of the energy using system is predicted by a first artificial intelligence model according to at least one of the following data: current temperature, current time, current weather, current humidity, heat demand rate at multiple times within a first predetermined time period before the current time; the expected heat generation rate of the heat conversion device is predicted by a second artificial intelligence model according to at least one of the following data: state information of the energy conversion device, current sailing state of the ship, temperature of the heating medium in the heat conversion device, pressure in the heat conversion device, flow of the heating medium in the heat conversion device, heat generation rate at multiple times within a second predetermined time period before the current time.

[0016] According to an aspect of an embodiment of the present application, a waste heat recovery method is provided, which is applied to a waste heat recovery system as described in the above embodiments, and the method comprises: obtaining a heat generation rate of a heat conversion device and a heat demand rate of an energy using system respectively, the energy using system being configured to use heat energy carried in target medium generated by the heat conversion device; when it is determined that the heat generation rate of the heat conversion device exceeds the heat demand rate of the energy using system, connecting a second communication path between a heat energy storage module and the heat conversion device, so as to receive the target medium from the heat conversion device by the heat energy storage module and store energy of the target medium.

[0017] According to an aspect of an embodiment of the present application, there is provided a waste heat recovery device, the device being located in a waste heat recovery system as described in the above embodiments, the device comprising: an acquisition unit configured to acquire a heat generation rate of a heat conversion device and a heat demand rate of an energy using system respectively, the energy using system being configured to use heat energy carried in a target medium generated by the heat conversion device; and a control unit configured to, when it is determined that the heat generation rate of the heat conversion device exceeds the heat demand rate of the energy using system, connect a second communication path between a heat energy storage module and the heat conversion device, so as to receive the target medium from the heat conversion device by the heat energy storage module and store energy of the target medium.

[0018] According to an aspect of an embodiment of the present application, there is provided a computer readable medium having stored thereon a computer program, the computer program, when executed by a processor, implementing the method as described in the above embodiments.

[0019] According to an aspect of an embodiment of the present application, there is provided an electronic device comprising: one or more processors; and a storage device configured to store one or more programs, the one or more programs, when executed by the one or more processors, causing the one or more processors to implement the method as described in the above embodiments.

[0020] In some embodiments provided by the present application, a waste heat recovery system located on a ship is provided, which comprises a heat conversion device connected with an energy conversion device, an energy using system having a first communication path with the heat conversion device, a thermal energy storage module having a second communication path with the heat conversion device, and an intelligent control module, the heat conversion device is used to receive a heating medium generated by the energy conversion device during operation, and to transfer the heat of the heating medium to a target medium, and the energy using system is used to receive the target medium from the heat conversion device, and to use the thermal energy carried by the target medium, so as to realize the recycling of the waste heat in the heating medium generated by the energy conversion device, and to reduce energy waste; and the thermal energy storage module of the system is used to receive the target medium from the heat conversion device, and to store the energy of the target medium, and the intelligent control module is used to connect the thermal energy storage module and the heat conversion device when it is determined that the heat generation rate of the heat conversion device exceeds the heat demand rate of the energy using system, so as to store the energy of the target medium received from the heat conversion device through the thermal energy storage module. Therefore, the excess heat generated by the heat conversion device can be stored when the heat demand rate of the energy using system does not exceed the heat generation rate of the heat conversion device, that is, the energy can be stored when the energy demand of the energy using system is low, so that the excess energy generated by the heat conversion device can also be stored and utilized when the energy demand of the energy using system is low, and the energy utilization efficiency and economy are improved.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0023] Figure 1 A structural schematic diagram of a waste heat recovery system according to an embodiment of the present application.

[0024] Figure 2 A flowchart of a waste heat recovery method according to an embodiment of the present application is shown.

[0025] Figure 3 A block diagram of a waste heat recovery device according to an embodiment of the present application is shown.

[0026] Figure 4A structural diagram of a computer system of an electronic device suitable for implementing the embodiments of the present application is shown.

[0027] Reference signs are explained as follows.

[0028] 11 - energy conversion device, 12 - heating medium delivery passage, 13 - heat conversion device, 131 - target medium outlet, 14 - chimney, 15 - second communication path, 151 - first position, 16 - thermal energy storage module, 161 - target medium inlet, 17 - third communication path, 18 - waste heat recovery heat exchanger, 19 - fourth communication path, 20 - fifth communication path, 21 - condensing system, 22 - second position, 300 - waste heat recovery device, 310 - acquisition unit, 320 - control unit, 400 - computer system, 401 - CPU, 402 - ROM, 403 - RAM, 404 - bus, 405 - I / O interface, 406 - input part, 407 - output part, 408 - storage part, 409 - communication part, 410 - drive, 411 - detachable medium. DETAILED DESCRIPTION

[0029] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings; however, the example embodiments can be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the example embodiments to those skilled in the art.

[0030] Moreover, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the

[0031] In the embodiments of the present application, the term "module" or "unit" refers to a computer program or a part of a computer program having a predetermined function, and works together with other related parts to achieve a predetermined target, and can be implemented entirely or partially by using software, hardware (such as a processing circuit or a memory), or a combination thereof. Similarly, one processor (or multiple processors or memories) can be used to implement one or more modules or units. In addition, each module or unit can be a part of an integral module or unit that includes the function of the module or unit.

[0032] The block diagrams shown in the drawings are merely functional entities, and do not necessarily have to correspond to physically independent entities. That is, the functional entities can be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0033] The flowcharts shown in the drawings are merely exemplary illustrations, and do not necessarily include all contents and operations / steps, nor do they have to be executed in the order described. For example, some operations / steps can be further decomposed, and some operations / steps can be combined or partially combined, so the actual execution order can be changed according to actual conditions.

[0034] A large amount of high-temperature exhaust gas is generated during the operation of a marine engine (especially a diesel engine), and the related art usually directly discharges it into the atmosphere, causing energy waste.

[0035] According to an aspect of the present application, the present application first provides a waste heat recovery system. The waste heat recovery system provided by the present application can be used in any place capable of generating waste heat such as a ship, and can be applied to a cargo transport ship or a passenger ship or other types of ships. The waste heat recovery system provided by the present application can be arranged on a ship.

[0036] The waste heat recovery system provided by the present application is a high-efficiency, low-cost, and intelligent waste heat recovery system, which can realize full-condition utilization of ship waste heat, reduce fuel consumption and carbon emissions, and improve the energy utilization efficiency of the ship.

[0037] Figure 1 A structural schematic diagram of the waste heat recovery system according to an embodiment of the present application. Please refer to Figure 1As shown, the waste heat recovery system can include a heat conversion device 13, which is connected to the energy conversion device 11 through the heating medium delivery channel 12, and the heat conversion device 13 is used to receive the heating medium generated by the energy conversion device 11 during operation through the heating medium delivery channel 12, and transfer the heat of the heating medium to the target medium. The energy conversion device 11 is any device with energy conversion function, which can be an engine or a generator set; when the energy conversion device 11 is an engine, it can be used as a marine engine for driving the navigation of the ship, and at this time the energy conversion device 11 can be a diesel engine or a gasoline engine; when the energy conversion device 11 is a generator set, it can include an internal combustion engine and a generator. The heating medium generated by the energy conversion device 11 during operation can be exhaust gas or tail gas, and at this time the heating medium delivery channel 12 can be an exhaust pipe; the heating medium can also be a heated cooling medium, which can be formed after the cooling medium used to cool the engine or the generator completes heat absorption in the engine or the generator, and the cooling medium can be cylinder jacket water used to cool the cylinder jacket of the engine or the generator, in which case the heating medium output channel can be a heated cooling medium output channel.

[0038] Next, the scheme of the embodiment of the application will be described in detail taking the heating medium as exhaust gas as an example.

[0039] The temperature of the exhaust gas generated by the engine (such as a diesel engine) during operation can reach 300-500°C, so it is necessary to utilize the heat energy of these exhaust gases.

[0040] The heat conversion device 13 is a device for transferring heat between media, which can be an exhaust gas boiler or a heater.

[0041] Taking the exhaust gas boiler as an example, the target medium carrying heat generated by the heat conversion device 13 can be hot water, hot oil, or steam. A chimney 14 can be provided on the heat conversion device 13 to communicate with the atmosphere, so that the exhaust gas used by the heat conversion device 13 can be discharged to the atmosphere through the chimney 14.

[0042] The exhaust gas boiler can include a heat exchange module, which can adopt a multi-stage finned tube heat exchanger to improve the heat transfer efficiency between the exhaust gas and the working medium (such as water or heat conducting oil). The surface of the multi-stage finned tube heat exchanger can be coated with a high-temperature resistant and corrosion resistant coating to adapt to the high humidity and high salt spray environment of the ship. The control of the working medium flow of the heat exchanger can be optimized by PID algorithm to ensure the stability of the system operation.

[0043] The waste heat recovery system can also include an energy use system (e.g., a heating system, a cooling system, a power generation system, or a combination thereof). Figure 1The target medium outlet 131 of the heat conversion device 13 is connected with a first communication path (not shown) with the heat energy storage module 16, for receiving the target medium from the heat conversion device 13 and storing the energy of the target medium.

[0044] One or more devices in the energy using system can use the energy of the target medium, one or more of the devices can include a component for exchanging heat with the target medium, so as to transfer the energy of the target medium to the medium of the device; one or more of the devices can also directly use the target medium. The devices can include a heater, an air conditioner, an air exchanger, a water heater, etc., and can also include other devices on the ship that need heat energy. The devices can provide hot water, hot air, etc.

[0045] If only the exhaust gas boiler is used for waste heat recovery, the recovery efficiency is low, only part of the heat can be recovered, and the recovered heat energy is greatly affected by the fluctuation of the operating conditions of the ship and is difficult to dynamically allocate.

[0046] Therefore, the waste heat recovery system in the present application can also include a heat energy storage module 16, which is connected with the heat conversion device 13 through a second communication path 15, one end of the second communication path 15 is connected with the target medium outlet 131 of the heat conversion device 13, and the other end of the second communication path 15 is connected with the target medium inlet 161 of the heat energy storage module 16, so that the target medium carrying heat generated by the heat conversion device 13 can flow into the heat energy storage module 16 through the target medium outlet 131, the second communication path 15 and the target medium inlet 161 in sequence. The heat energy storage module 16 is used to receive the target medium from the heat conversion device 13 and store the energy of the target medium.

[0047] The heat energy storage module 16 can be used to convert the energy of the target medium into electrical energy and store the electrical energy. For example, the heat energy storage module 16 can be an Organic Rankine Cycle (ORC) waste heat generator.

[0048] The heat energy storage module 16 can also be in other forms, for example, it can be a phase change heat storage material (such as a paraffin-based composite material), and its heat storage density can reach more than 200 kJ / kg.

[0049] The heat energy storage module 16 can even be a storage tank with heat preservation or heat insulation function, so as to directly store hot water, hot oil or steam.

[0050] The waste heat recovery system can also include an intelligent control module (not shown) connected with the heat conversion device 13 and the heat energy storage module 16, for controlling the operation of the heat conversion device 13 and the heat energy storage module 16. Figure 1(not shown) for connecting the second communication path 15 to store the energy in the target medium received from the heat conversion device 13 through the thermal energy storage module 16 when it is determined that the heat generation rate of the heat conversion device 13 exceeds the heat demand rate of the energy using system.

[0051] The intelligent control module can be a PLC or a single-chip microcomputer, or other microcontrollers. The intelligent control module can dynamically adjust the thermal energy distribution path.

[0052] In this way, the problem that waste heat cannot be effectively utilized due to large fluctuations in the operating conditions of the ship and insufficient heat demand of the energy using system can be overcome, full-condition utilization of ship waste heat is achieved, and the energy utilization efficiency of the ship is improved.

[0053] In an embodiment of the present application, the heat generation rate is determined by the intelligent control module according to at least one of the following data: the load of the energy conversion device, the temperature of the heating medium, and the state of the energy conversion device; and the heat demand rate of the energy using system is determined by the intelligent control module according to at least one of the following data: the flow of the medium in the energy using system, the temperature of the medium in the energy using system, and the pressure of the medium in the energy using system.

[0054] The heat generation rate is the rate of heat generation per unit time; and the heat demand rate is the rate of heat use per unit time.

[0055] The data in the above embodiments can be obtained in real time by sensors, for example, the flow of the medium in the energy using system can be obtained by a flow sensor, the temperature of the medium in the energy using system can be obtained by a temperature sensor, and the pressure of the medium in the energy using system can be obtained by a pressure sensor. Of course, more sensors can be provided in the system, and the heat generation rate and the heat demand rate can be determined according to other more types of data.

[0056] The intelligent control module can determine the heat generation rate according to at least one of the following data: the load of the energy conversion device, the temperature of the heating medium, and the state of the energy conversion device, by using any of the following ways: a pre-labeled data relationship, a predetermined function, or a pre-trained machine learning model.

[0057] Similarly, the intelligent control module can determine the heat demand rate according to at least one of the following data: the flow of the medium in the energy using system, the temperature of the medium in the energy using system, and the pressure of the medium in the energy using system, by using any of the following ways: a pre-labeled data relationship, a predetermined function, or a pre-trained machine learning model.

[0058] Please continue to see Figure 1As shown, the waste heat recovery system can further include a waste heat recovery heat exchanger 18, which can transfer the heat of the target medium to a predetermined medium, so as to recover the excess waste heat. The predetermined medium can be water, oil or various mediums. The predetermined medium can be used for heating, and can also be used to provide hot water for life on the ship. The waste heat recovery heat exchanger 18 and the heat conversion device 13 are connected through a third communication path 17, which can be directly connected to the heat conversion device 13, or connected to the second communication path 15 at the first position 151 of the second communication path 15. The advantage is that the length and cost of the pipeline can be saved, the limited space on the ship can be avoided, and only one target medium outlet needs to be arranged on the heat conversion device 13, so that the cost is further saved. Therefore, the waste heat recovery heat exchanger 18 can also obtain the target medium generated by the heat conversion device 13 through the third communication path 17, and further transfer the heat in the target medium.

[0059] Similarly, the first communication path can be connected to the second position 22 of the third communication path 17, that is, the target medium can enter the energy use system through the second communication path 15, the third communication path 17 and the first communication path in turn, so as to save the length and cost of the pipeline.

[0060] The intelligent control module can be further used to: when it is determined that the heat generation rate of the heat conversion device exceeds the heat demand rate of the energy use system, and the difference between the heat generation rate and the heat demand rate of the energy use system is greater than the maximum energy storage rate of the thermal energy storage module, connect the second communication path and the third communication path, so as to store energy through the thermal energy storage module, and collect heat through the waste heat recovery heat exchanger.

[0061] The maximum energy storage rate of the thermal energy storage module is a parameter of the thermal energy storage module.

[0062] If the heat generation rate of the heat conversion device 13 exceeds the heat demand rate of the energy use system, and the difference between the heat generation rate and the heat demand rate of the energy use system is greater than the maximum energy storage rate of the thermal energy storage module 16, the second communication path 15 and the third communication path 17 are connected at the same time, so that the energy is fully utilized through the thermal energy storage module 16 and the waste heat recovery heat exchanger 18.

[0063] In an embodiment of the present application, a first control valve is arranged on the third communication path 17, and the intelligent control module is further used to: when the difference between the heat generation rate and the heat demand rate of the energy use system is greater than the maximum energy storage rate of the thermal energy storage module, determine a first opening degree of the first control valve according to the difference between the heat generation rate and the heat demand rate of the energy use system, and adjust the opening degree of the first control valve to the first opening degree, so as to control the flow of the third communication path 17 through the first control valve.

[0064] Specifically, the second communication path 15 can also be provided with a second control valve, and the first control valve and the second control valve can both be solenoid valves and can both be electrically connected with the intelligent control module. The second control valve can be arranged between the first position 151 and the target medium inlet 161. When the difference between the heat generation rate and the heat demand rate of the energy use system is greater than the maximum energy storage rate of the thermal energy storage module, the intelligent control module can determine the opening degree of the second control valve according to the maximum energy storage rate of the thermal energy storage module, and adjust the second control valve to the opening degree, so that the thermal energy storage module can store energy at the maximum energy storage rate, ensuring the most efficient use of energy; of course, the opening degree of the second control valve corresponding to the maximum energy storage rate of the thermal energy storage module can be the maximum opening degree of the second control valve, so at this time, only the opening degree of the second control valve needs to be adjusted to the maximum opening degree.

[0065] The first opening degree of the first control valve can be determined by: determining the difference between the difference between the heat generation rate and the heat demand rate of the energy use system and the maximum energy storage rate of the thermal energy storage module as a final difference; and determining the opening degree of the second control valve according to the final difference.

[0066] The final difference is the heat recovery rate of the waste heat recovery heat exchanger 18 when the thermal energy storage module stores energy at the maximum energy storage rate.

[0067] When the difference between the heat generation rate and the heat demand rate of the energy use system is greater than the maximum energy storage rate of the thermal energy storage module, the thermal energy storage module can also not store energy at the maximum energy storage rate, and at this time, the opening degrees of the first control valve and the second control valve can be adjusted as needed.

[0068] Please continue to see Figure 1 As shown, the waste heat recovery heat exchanger 18 is also connected in communication with a condensing system 21 through a fifth communication path 20, and the condensing system 21 can include a hot well and an atmospheric condenser. When the target medium is steam, the steam used by the waste heat recovery heat exchanger 18 can enter the condensing system 21 through the fifth communication path 20, and the condensing system 21 can perform steam condensation and condensate recovery. The steam used by the thermal energy storage module 16 can enter the fifth communication path 20 through the fourth communication path 19, and then enter the condensing system 21 through the fifth communication path 20.

[0069] In an embodiment of the present application, the intelligent control module is further configured to: when it is determined that the heat generation rate of the heat conversion device exceeds the heat demand rate of the energy use system, but the difference between the heat generation rate and the heat demand rate of the energy use system does not exceed the maximum energy storage rate of the thermal energy storage module, connect the second communication path and place the third communication path in a cut-off state, so as to store energy through the thermal energy storage module.

[0070] When it is determined that the heat generation rate of the heat conversion device 13 exceeds the heat demand rate of the energy using system, but the difference between the heat generation rate and the heat demand rate of the energy using system does not exceed the maximum energy storage rate of the thermal energy storage module 16, the energy that cannot be used by the energy using system can be stored by the thermal energy storage module 16 by connecting the second communication path 15 and disconnecting the third communication path 17, so as to realize full recovery of waste heat.

[0071] In an embodiment of the present application, the intelligent control module is further configured to: when it is determined that the heat generation rate of the heat conversion device exceeds the heat demand rate of the energy using system, but the difference between the heat generation rate and the heat demand rate of the energy using system does not exceed the maximum energy storage rate of the thermal energy storage module, determining the second opening degree of the second control valve according to the difference between the heat generation rate and the heat demand rate of the energy using system, and adjusting the opening degree of the second control valve to the second opening degree.

[0072] The difference between the heat generation rate and the heat demand rate of the energy using system can be regarded as the current thermal energy storage rate of the thermal energy storage module 16, and the opening degree of the second control valve corresponding to the current thermal energy storage rate can be determined as the second opening degree according to the predetermined correspondence between the thermal energy storage rate and the opening degree of the second control valve, so as to ensure that the energy storage rate of the thermal energy storage module 16 is adapted to the heat demand rate of the energy using system.

[0073] In an embodiment of the present application, the thermal energy storage module is physically connected to the energy using system, and the intelligent control module is further configured to: when it is determined that the heat generation rate of the heat conversion device cannot reach the heat demand rate of the energy using system, disconnecting the second communication path between the heat conversion device and the thermal energy storage module, and connecting the physical connection between the energy using system and the thermal energy storage module, so as to provide energy for the energy using system by the thermal energy storage module alone or by the heat conversion device and the thermal energy storage module jointly.

[0074] The physical connection between the thermal energy storage module and the energy using system can be an electrical connection or a pipe connection.

[0075] In the embodiment of the present application, when it is determined that the heat generation rate of the heat conversion device cannot reach the heat demand rate of the energy using system, the second communication path between the heat conversion device and the thermal energy storage module is disconnected, and the physical connection between the energy using system and the thermal energy storage module is connected, so as to ensure that the energy using system can obtain sufficient energy and ensure normal operation of the energy using system.

[0076] In an embodiment of the present application, the thermal energy storage module is configured to convert the energy of the target medium into electrical energy and store the electrical energy; the physical connection is an electrical connection, and the energy utilization system is further configured to use the electrical energy provided by the thermal energy storage module when the heat generation rate of the heat conversion device cannot meet the heat demand rate of the energy utilization system.

[0077] The energy utilization system can include devices that use electrical energy instead of thermal energy to achieve heating or water heating, and these devices can use electrical energy to achieve their functions. Of course, one or more devices in the energy utilization system can use both electrical energy and thermal energy, so that the electrical energy provided by the thermal energy storage module and the thermal energy provided by the heat conversion device can be fully utilized.

[0078] In an embodiment of the present application, the intelligent control module is further configured to: when it is determined that the load of the energy conversion device is lower than a predetermined threshold or the energy conversion device enters a shutdown state, cut off the second communication path between the heat conversion device and the thermal energy storage module, and connect the physical connection between the energy utilization system and the thermal energy storage module, so as to provide energy for the energy utilization system by the thermal energy storage module alone or by the combination of the heat conversion device and the thermal energy storage module.

[0079] The intelligent control module can directly achieve dynamic allocation of thermal energy according to the load of the energy conversion device or the energy conversion device entering a shutdown state, without complex calculation, thereby improving control efficiency.

[0080] In an embodiment of the present application, the intelligent control module is further configured to: obtain an expected heat demand rate of the energy utilization system and an expected heat generation rate of the heat conversion device; determine a first expected opening degree of the first control valve and / or a second expected opening degree of the second control valve according to the expected heat demand rate and the expected heat generation rate; adjust the opening degree of the first control valve in the direction of the first expected opening degree; and / or adjust the opening degree of the second control valve in the direction of the second expected opening degree.

[0081] The expected heat demand rate of the energy utilization system and the expected heat generation rate of the heat conversion device are predicted heat demand rate and heat generation rate at a future target time (e.g., 10 seconds later or 5 seconds later).

[0082] Adjusting the opening degree of the first control valve in the direction of the first expected opening degree does not mean adjusting the first control valve to the first expected opening degree, but means adjusting the opening degree to be closer to the first expected opening degree than the current opening degree; adjusting the opening degree of the second control valve in the direction of the second expected opening degree does not mean adjusting the second control valve to the second expected opening degree, but means adjusting the opening degree to be closer to the second expected opening degree than the current opening degree.

[0083] In the embodiment of the application, the pre-adjustment of the control valve is realized, and the opening degree of the control valve can be responded in advance, thereby ensuring the accuracy of the dynamic distribution of thermal energy.

[0084] In an embodiment of the application, the expected heat demand rate of the energy use system is predicted by a first artificial intelligence model according to at least one of the following data: current temperature, current time, current weather, current humidity, heat demand rate at multiple times within a first predetermined time period before the current time; and the expected heat generation rate of the heat conversion device is predicted by a second artificial intelligence model according to at least one of the following data: state information of the energy conversion equipment, current sailing state of the ship, temperature of the heating medium in the heat conversion device, pressure in the heat conversion device, flow of the heating medium in the heat conversion device, and heat generation rate at multiple times within a second predetermined time period before the current time.

[0085] The state information of the energy conversion equipment may, for example, be shutdown, low load, high load, etc., and the current sailing state of the ship may, for example, be at anchor, high-speed sailing, slow sailing, etc. The first artificial intelligence model for predicting the expected heat demand rate and the second artificial intelligence model for predicting the expected heat generation rate can be obtained by pre-training based on historical data.

[0086] The first artificial intelligence model and the second artificial intelligence model can both be models constructed based on neural networks. Of course, the data used by the first artificial intelligence model and the second artificial intelligence model for prediction can also include other various types of data, which only need to be set with corresponding sensors on the ship and data acquisition.

[0087] According to another aspect of the application, the application also provides a waste heat recovery method, which can be applied to the waste heat recovery system as described in the above embodiments.

[0088] Figure 2 A flowchart of a waste heat recovery method according to an embodiment of the application is shown. Please refer to Figure 2 As shown, the method can be performed by the intelligent control module in the aforementioned waste heat recovery system, and the method can include the following steps:

[0089] In step 210, the heat generation rate of the heat conversion device and the heat demand rate of the energy use system are obtained, respectively, and the energy use system is used to use the thermal energy carried in the target medium generated by the heat conversion device.

[0090] In step 220, when it is determined that the heat generation rate of the heat conversion device exceeds the heat demand rate of the energy using system, the second communication path between the thermal energy storage module and the heat conversion device is connected to receive the target medium from the heat conversion device through the thermal energy storage module and store the energy of the target medium.

[0091] Similarly, the waste heat recovery method can also include all methods executed by the intelligent control module in the waste heat recovery system described above, which will not be described here.

[0092] In summary, according to the waste heat recovery system and the waste heat recovery method in the embodiments of the present application, the following technical effects can be achieved at least:

[0093] Energy efficiency improvement: waste heat recovery efficiency is improved to more than 65% (traditional technology ≤ 40%);

[0094] Fuel saving: boiler fuel consumption is reduced by 20%-30%;

[0095] Emission reduction benefit: ship carbon emissions are reduced by 15%-25%;

[0096] Economic: system payback period ≤ 3 years, suitable for various ship types.

[0097] The device embodiments of the present application are introduced below, which can be used to execute the waste heat recovery method in the above-mentioned embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the above-mentioned embodiments of the waste heat recovery method.

[0098] Figure 3 A block diagram of a waste heat recovery device according to an embodiment of the present application is shown. Referring to Figure 3 As shown, according to a waste heat recovery device 300 of an embodiment of the present application, the device is located in the waste heat recovery system as described in the above-mentioned embodiments, and the device comprises an acquisition unit 310 and a control unit 320. The acquisition unit 310 is configured to acquire the heat generation rate of the heat conversion device and the heat demand rate of the energy using system respectively, and the energy using system is configured to use the thermal energy carried in the target medium generated by the heat conversion device. The control unit 320 is configured to connect the second communication path between the thermal energy storage module and the heat conversion device when it is determined that the heat generation rate of the heat conversion device exceeds the heat demand rate of the energy using system, to receive the target medium from the heat conversion device through the thermal energy storage module, and to store the energy of the target medium.

[0099] Figure 4 A structural schematic diagram of a computer system of an electronic device suitable for implementing the embodiments of the present application is shown.

[0100] It should be noted that,Figure 4 The computer system 400 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0101] like Figure 4 As shown, the computer system 400 includes a CPU 401, which can perform various appropriate actions and processes according to a program stored in ROM 402 or a program loaded into RAM 403 from storage section 408, such as performing the methods described in the above embodiments. The RAM 403 also stores various programs and data required for system operation. The CPU 401, ROM 402, and RAM 403 are interconnected via bus 404. An I / O interface 405 is also connected to bus 404.

[0102] The following components are connected to I / O interface 405: an input section 406 including a keyboard, mouse, etc.; an output section 407 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 408 including a hard disk, etc.; and a communication section 409 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 409 performs communication processing via a network such as the Internet. A drive 410 is also connected to I / O interface 405 as needed. A removable medium 411, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 410 as needed so that computer programs read from it can be installed into storage section 408 as needed.

[0103] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 409, and / or installed from removable medium 411. When the computer program is executed by CPU 401, it performs various functions defined in the system of this application.

[0104] It should be noted that the computer-readable medium in the embodiments of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination thereof. The computer-readable storage medium may, for example, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or apparatus, or any combination thereof. More specific examples of the computer-readable storage medium can include, but are not limited to, an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (Compact Disc Read-Only Memory, CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present application, the computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, device or apparatus. In the present application, the computer-readable signal medium can include a data signal carried in a baseband or as a part of a carrier wave, which carries computer-readable program code. Such a propagated data signal can take various forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination thereof. The computer-readable signal medium can also be any computer-readable medium other than the computer-readable storage medium, which can send, transmit, propagate or transport a program for use by or in conjunction with an instruction execution system, device or apparatus. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, or the like, or any suitable combination thereof.

[0105] The flowcharts and block diagrams in the drawings illustrate the possible implementation architectures, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In the flowcharts or block diagrams, each block can represent a module, a program segment, or a part of code, which contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur in different orders than that shown in the drawings. For example, two blocks that are shown in succession can actually be executed substantially in parallel, and sometimes in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams or flowcharts, and the combination of blocks in the block diagrams or flowcharts, can be implemented by a dedicated hardware-based system that performs the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0106] The units described in the embodiments of the present application can be implemented by software, or by hardware, or by a combination of software and hardware. The units described can also be located in a single processor. In some cases, the names of the units do not limit the units themselves.

[0107] As an aspect, the present application also provides a computer readable medium, which can be included in the electronic device described in the above embodiments, or can exist separately without being assembled into the electronic device. The computer readable medium carries one or more programs, which, when executed by the electronic device, cause the electronic device to implement the method described in the above embodiments.

[0108] It should be noted that although several modules or units of the device for action execution are mentioned in the above detailed description, the division is not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided into several modules or units.

[0109] From the above description of the embodiments, those skilled in the art will readily appreciate that the example embodiments described herein can be implemented by software and / or by hardware coupled with software. Accordingly, the technical solutions according to the embodiments of the present application can be embodied in the form of a software product. The software product can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, or the like) or on a network, and includes several instructions to make a computing device (which can be a personal computer, a server, a touch terminal, or a network device, etc.) execute the methods according to the embodiments of the present application.

[0110] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such

[0111] It should be understood that the present application is not limited to the precise construction that has been described above and illustrated in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the present application. The scope of the present application is limited only by the appended claims.

Claims

1. A waste heat recovery system, characterized by, The system is located on a ship, and the system comprises: a heat conversion device for receiving a heating medium generated by an energy conversion device during operation and transferring heat of the heating medium to a target medium; an energy using system in a first communication path with the heat conversion device for receiving the target medium from the heat conversion device and using heat energy carried by the target medium; a thermal energy storage module in a second communication path with the heat conversion device for receiving the target medium from the heat conversion device and storing energy of the target medium; the thermal energy storage module is physically connected with the energy using system; a waste heat recovery heat exchanger in a third communication path with the heat conversion device; an intelligent control module for, when determining that a heat generation rate of the heat conversion device exceeds a heat demand rate of the energy using system, connecting the second communication path to store energy of the target medium received from the heat conversion device through the thermal energy storage module; and when determining that the heat generation rate of the heat conversion device cannot reach the heat demand rate of the energy using system, cutting off the second communication path between the heat conversion device and the thermal energy storage module and connecting the physical connection between the energy using system and the thermal energy storage module to provide energy for the energy using system through the thermal energy storage module alone or through the heat conversion device and the thermal energy storage module jointly; the intelligent control module is further used for, when determining that the heat generation rate of the heat conversion device exceeds the heat demand rate of the energy using system and a difference between the heat generation rate and the heat demand rate of the energy using system is greater than a maximum energy storage rate of the thermal energy storage module, connecting the second communication path and the third communication path to store energy through the thermal energy storage module and collect heat through the waste heat recovery heat exchanger.

2. The waste heat recovery system of claim 1, wherein, The thermal energy storage module is used for converting energy of the target medium into electric energy and storing the electric energy; the physical connection is an electrical connection, and the energy using system is further used for using electric energy provided by the thermal energy storage module when the heat generation rate of the heat conversion device cannot reach the heat demand rate of the energy using system.

3. The waste heat recovery system of claim 1, wherein, A first control valve is arranged on the third communication path, and the intelligent control module is further used for: when the difference between the heat generation rate and the heat demand rate of the energy using system is greater than the maximum energy storage rate of the thermal energy storage module, determining a first opening degree of the first control valve according to the difference between the heat generation rate and the heat demand rate of the energy using system and adjusting the opening degree of the first control valve to the first opening degree to control a flow of the third communication path through the first control valve.

4. The waste heat recovery system of claim 3, wherein, The intelligent control module is further used for: when it is determined that the heat generation rate of the heat conversion device exceeds the heat demand rate of the energy using system, but the difference between the heat generation rate and the heat demand rate of the energy using system does not exceed the maximum energy storage rate of the thermal energy storage module, the second communication path is connected, and the third communication path is in a cut-off state, so as to store energy through the thermal energy storage module.

5. The heat recovery system according to claim 4, wherein The second communication path is provided with a second control valve, and the intelligent control module is further used for: when it is determined that the heat generation rate of the heat conversion device exceeds the heat demand rate of the energy using system, but the difference between the heat generation rate and the heat demand rate of the energy using system does not exceed the maximum energy storage rate of the thermal energy storage module, the second opening degree of the second control valve is determined according to the difference between the heat generation rate and the heat demand rate of the energy using system, and the opening degree of the second control valve is adjusted to the second opening degree.

6. The waste heat recovery system according to any one of claims 1 to 5, characterized in that, The heat generation rate is determined according to at least one of the following data: the load of the energy conversion equipment, the temperature of the heating medium, and the state of the energy conversion equipment; and the heat demand rate of the energy using system is determined according to at least one of the following data: the flow of the medium in the energy using system, the temperature of the medium in the energy using system, and the pressure of the medium in the energy using system.

7. The waste heat recovery system of claim 5, wherein, The intelligent control module is further used for: obtaining an expected heat demand rate of the energy using system and an expected heat generation rate of the heat conversion device; determining a first expected opening degree of the first control valve and / or a second expected opening degree of the second control valve according to the expected heat demand rate and the expected heat generation rate; adjusting the opening degree of the first control valve to the direction of the first expected opening degree; and / or adjusting the opening degree of the second control valve to the direction of the second expected opening degree.

8. The waste heat recovery system of claim 7, wherein, The expected heat demand rate of the energy using system is predicted by a first artificial intelligence model according to at least one of the following data: current temperature, current time, current weather, current humidity, and heat demand rates at multiple times within a first predetermined time period before the current time; and the expected heat generation rate of the heat conversion device is predicted by a second artificial intelligence model according to at least one of the following data: state information of the energy conversion equipment, a current sailing state of the ship, a temperature of the heating medium in the heat conversion device, a pressure in the heat conversion device, a flow of the heating medium in the heat conversion device, and heat generation rates at multiple times within a second predetermined time period before the current time.

9. A waste heat recovery method characterized by, The method is applied to the waste heat recovery system according to any one of claims 1-8, and the method comprises: respectively obtaining a heat generation rate of a heat conversion device and a heat demand rate of an energy using system, the energy using system being used to use thermal energy carried in a target medium generated by the heat conversion device; Upon determining that the heat generation rate of the heat conversion device exceeds the heat demand rate of the energy using system, a second communication path between a thermal energy storage module and the heat conversion device is engaged to receive a target medium from the heat conversion device by the thermal energy storage module and store energy of the target medium.

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