Passenger ship and passenger ship waste heat recovery system thereof

Abstract

The invention provides a passenger ship and a passenger ship waste heat recovery system thereof. The waste heat recovery system comprises a heat energy generation module, a cooling module, a first-stage heat recovery module and a second-stage heat recovery module. The heat energy generation module is connected with the cooling module and the primary heat recovery module; the cooling module is connected with the secondary heat recovery module; the heat energy generation module is used for generating target energy and high-temperature waste gas; the cooling module is used for cooling when the heat energy generation module generates the target energy so as to generate high-temperature cooling liquid; the primary heat recovery module is used for converting the high-temperature waste gas into the target energy; and the second-stage heat recovery module is used for converting the high-temperature cooling liquid into the target energy. According to the waste heat recovery system for the passenger ship, the heat utilization efficiency of the ship is improved to the maximum extent, the energy loss is reduced, and ship emission is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of shipbuilding, and more particularly to a passenger ship and its waste heat recovery system. Background Technology

[0002] Severe environmental pollution and increased awareness of environmental protection have made energy conservation and emission reduction a global consensus and an inevitable choice for sustainable development.

[0003] As a vital component of global trade, the shipping industry, driven by international organizations such as the International Maritime Organization (IMO), is prompting shipping companies to actively seek solutions to reduce energy consumption and improve energy efficiency. Passenger ships generate significant heat and electricity demands during operation, and these demands vary across different seasons and navigation conditions. Furthermore, passenger ships consume substantial amounts of energy during voyages, with only about 35% of the generated energy being effectively utilized, resulting in significant resource waste. Summary of the Invention

[0004] The technical problem to be solved by this disclosure is to overcome the defects of resource waste in the operation of passenger ships in the prior art, and to provide a passenger ship and its waste heat recovery system to reduce ship heat loss, achieve maximum utilization of ship thermal energy, and reduce ship navigation energy consumption.

[0005] This disclosure solves the above-mentioned technical problems through the following technical solution:

[0006] According to a first aspect of this disclosure, a waste heat recovery system for a passenger ship is provided, the waste heat recovery system comprising: a heat energy generation module, a cooling module, a primary heat recovery module, and a secondary heat recovery module;

[0007] The heat generation module is connected to the cooling module and the primary heat recovery module;

[0008] The cooling module is connected to the secondary heat recovery module;

[0009] The heat generation module is used to generate target energy and high-temperature exhaust gas;

[0010] The cooling module is used to cool down the heat generation module when it generates the target energy, so as to generate a high-temperature coolant.

[0011] The primary heat recovery module is used to convert the high-temperature waste gas into the target energy;

[0012] The secondary heat recovery module is used to convert the high-temperature coolant into the target energy.

[0013] Optionally, the heat generation module includes an engine;

[0014] The engine is used to generate the high-temperature exhaust gas;

[0015] The primary heat recovery module includes a waste gas boiler, and the waste gas boiler includes a primary cooling water system.

[0016] The waste gas boiler is used to heat the primary cooling water based on the high-temperature waste gas in order to generate the target energy.

[0017] Optionally, the cooling module includes a cylinder liner water unit;

[0018] The cylinder liner water unit is used to cool the heat generation module to produce high-temperature liquid.

[0019] Optionally, the secondary heat recovery module includes a waste heat exchanger, which contains secondary cooling water.

[0020] The waste heat exchanger is used to heat the secondary cooling water based on the high-temperature liquid to generate the target energy.

[0021] Optionally, the target energy includes thermal energy; the thermal energy includes water vapor and hot water.

[0022] Optionally, the waste heat recovery system further includes: an energy storage module, a power generation module, and a utilization module;

[0023] The energy storage module is used to store the hot water;

[0024] The power generation module is used to generate electrical energy based on the water vapor;

[0025] The module is used to provide hot water to the target user.

[0026] Optionally, the waste heat recovery system further includes: a processing module and a switching module;

[0027] The switching module is located between the primary heat recovery module and the energy storage module, between the primary heat recovery module and the power generation module, between the primary heat recovery module and the user module, and between the secondary heat recovery module and the cooling module;

[0028] The processing module is used to control the switching module to open or close based on preset instructions.

[0029] Optionally, the waste heat recovery system further includes: an auxiliary heating module;

[0030] The processing module is used to obtain the actual temperature of the energy storage module, and in response to the actual temperature being less than a preset temperature, to issue a first heating command;

[0031] The auxiliary heating module is used to heat the water in the energy storage module to the preset temperature based on the first heating command.

[0032] Optionally, the auxiliary heating module includes an auxiliary boiler and an electric heating unit.

[0033] According to a second aspect of this disclosure, a passenger ship is provided, the passenger ship including the passenger ship waste heat recovery system described in the first aspect of this disclosure.

[0034] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this disclosure.

[0035] The positive and progressive effects of this disclosure are as follows:

[0036] The passenger ship waste heat recovery system disclosed herein achieves the recovery and reuse of high-temperature waste heat emitted by ship engines by setting up a primary heat recovery module, and achieves the recovery and reuse of cylinder liner water heat energy in ship engines by setting up a secondary heat recovery module, thereby greatly improving the ship's heat utilization efficiency, reducing energy loss, and reducing ship emissions.

[0037] Furthermore, by setting up different processing modules and switching modules, waste heat management of ship engines is realized, and different switches are controlled to meet the real-time heat demand of users, thereby saving energy to the maximum extent while meeting the heat demand of the ship system and users. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the waste heat recovery system for passenger ships provided in Embodiment 1 of this disclosure;

[0039] Figure 2 This is a schematic diagram illustrating the implementation principle of the passenger ship waste heat recovery system provided in Embodiment 1 of this disclosure. Detailed Implementation

[0040] The present disclosure is further illustrated below by way of embodiments, but the present disclosure is not limited to the scope of the embodiments described herein.

[0041] The prefixes such as "first" and "second" used in this disclosure are merely for distinguishing different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes used to distinguish descriptive objects in this disclosure does not constitute a limitation on the described objects. The description of the described objects is given in the claims or the context of the embodiments, and should not constitute an unnecessary limitation due to the use of such prefixes. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" means two or more.

[0042] Example 1

[0043] like Figure 1 As shown, this embodiment provides a waste heat recovery system for passenger ships, which includes: a heat generation module 100, a cooling module 200, a primary heat recovery module 300, and a secondary heat recovery module 400.

[0044] The heat generation module 100 is connected to the cooling module 200 and the primary heat recovery module 300;

[0045] The cooling module 200 is connected to the secondary heat recovery module 400;

[0046] The heat generation module 100 is used to generate target energy and high-temperature exhaust gas;

[0047] The cooling module 200 is used to cool down the heat generation module when it generates the target energy, so as to generate a high-temperature coolant.

[0048] The primary heat recovery module 300 is used to convert the high-temperature waste gas into the target energy;

[0049] The secondary heat recovery module 400 is used to convert the high-temperature coolant into the target energy.

[0050] The target energy in this embodiment includes thermal energy; the thermal energy includes water vapor and hot water.

[0051] The passenger ship waste heat recovery system disclosed herein achieves the recovery and reuse of high-temperature waste heat emitted by ship engines by setting up a primary heat recovery module, and achieves the recovery and reuse of cylinder liner water heat energy in ship engines by setting up a secondary heat recovery module, thereby greatly improving the ship's heat utilization efficiency, reducing energy loss, and reducing ship emissions.

[0052] In this embodiment, the heat generation module includes an engine;

[0053] The engine is used to generate the high-temperature exhaust gas;

[0054] The primary heat recovery module includes a waste gas boiler, and the waste gas boiler includes a primary cooling water system.

[0055] The waste gas boiler is used to heat the primary cooling water based on the high-temperature waste gas in order to generate the target energy.

[0056] High-temperature exhaust gas is a byproduct of fuel combustion in engine cylinders. Exhaust gas boilers directly utilize the residual heat from the high-temperature exhaust gas from the engine to generate steam, thereby achieving energy recovery and utilization.

[0057] Specifically, the high-temperature exhaust gas generated after the engine performs its work is introduced into the flue of the exhaust gas boiler through a pipe. The exhaust gas boiler is equipped with tube bundles or cavities filled with water. The high-temperature exhaust gas flows through the outside of these tube bundles or transfers heat to the walls of the cavities. Then, through heat conduction and convection, the heat of the exhaust gas passes through the metal walls and is transferred to the water in the tube bundles or cavities.

[0058] After absorbing heat, the water inside the tube or cavity will rise in temperature until it boils, thus obtaining the target energy: water vapor.

[0059] The generated steam can be used to drive generators, produce domestic hot water, etc., thereby realizing the recovery and utilization of energy, improving the overall efficiency of the engine, reducing fuel consumption, and lowering operating costs.

[0060] The cooling module in this embodiment includes a cylinder liner water unit;

[0061] The cylinder liner water unit is used to cool the heat generation module to produce high-temperature liquid.

[0062] The cylinder liner water unit is a coolant that circulates in the internal water passages of the engine. It flows through the water jacket around the cylinder liner and cylinder head, directly contacting the hottest parts of the engine. It cools the engine through heat transfer, absorbs the huge amount of heat conducted from the combustion chamber through the cylinder wall, prevents the engine from being damaged by overheating, and produces high-temperature liquid.

[0063] The secondary heat recovery module in this embodiment includes a waste heat exchanger, which contains secondary cooling water.

[0064] The waste heat exchanger is used to heat the secondary cooling water based on the high-temperature liquid to generate the target energy.

[0065] In one specific embodiment, the high-temperature cylinder liner water, i.e., high-temperature liquid, coming out of the engine cylinder liner and cylinder head is pumped into the waste heat exchanger.

[0066] Inside the waste heat exchanger, the high-temperature liquid is physically isolated from the secondary cooling water and flows based on alternating metal plates. The metal plates provide a huge heat transfer area, and heat is transferred from the high-temperature cylinder liner water through the thin plates to the secondary cooling water. The heated secondary cooling water is then transported to where it is needed, such as domestic hot water or energy storage tanks. While releasing the heat from the high-temperature liquid, it is also pumped back to the engine to continue performing its cooling task.

[0067] like Figure 1 As shown, the waste heat recovery system in this embodiment further includes: an energy storage module 500, a power generation module 600, and a usage module 700;

[0068] The energy storage module 500 is used to store the hot water;

[0069] The power generation module 600 is used to generate electrical energy based on the water vapor;

[0070] The usage module 700 is used to provide the hot water to the target user.

[0071] In one specific implementation, the energy storage module is an energy storage tank; the power generation module is a thermal power generation system; and the user module is user equipment.

[0072] like Figure 1 As shown, the waste heat recovery system in this embodiment further includes: a processing module 800 and a switching module 900;

[0073] The switching module is located between the primary heat recovery module and the energy storage module, between the primary heat recovery module and the power generation module, between the primary heat recovery module and the user module, and between the secondary heat recovery module and the cooling module;

[0074] The processing module is used to control the switching module to open or close based on preset instructions.

[0075] In one implementation, specific control commands are used to control the on / off states of different switches. For example, by real-time monitoring of heat and thermal energy demand and predictive evaluation of system parameters at various locations, corresponding switch control commands are set to control various valves and equipment in a timely and efficient manner, thereby ensuring multi-level management and utilization of heat.

[0076] By setting up different processing modules and switching modules, waste heat management of ship engines is realized. Different switches are controlled to meet the real-time heat demand of users, saving energy to the maximum extent while meeting the heat demand of the ship system and users.

[0077] like Figure 1 As shown, the waste heat recovery system in this embodiment further includes: an auxiliary heating module 1000;

[0078] The processing module is used to obtain the actual temperature of the energy storage module, and in response to the actual temperature being less than a preset temperature, to issue a first heating command;

[0079] The auxiliary heating module is used to heat the water in the energy storage module to the preset temperature based on the first heating command.

[0080] In one embodiment, the processing module further includes a temperature sensor, which acquires the actual temperature of the energy storage module and determines whether the actual temperature has reached a preset temperature. If it has, heating is not required through the auxiliary heating module; if it has not reached the preset temperature, the auxiliary heating module needs to be activated for heating. The auxiliary heating module includes an auxiliary boiler and an electric heating unit.

[0081] By setting up an auxiliary heating module, the hot water temperature is guaranteed for users, further improving the user experience; at the same time, by setting up an auxiliary boiler, emergency power is supplied in case of abnormal situations, such as a sudden power outage, further improving the stability of the system.

[0082] The implementation principle of the waste heat recovery system in this embodiment is explained below with specific implementation details:

[0083] like Figure 2 As shown, a waste heat recovery system includes: an engine, a waste gas boiler, a waste heat exchanger, a thermal power generation system, an energy storage tank, a processing system, an auxiliary boiler, user equipment, electric heating, and various valve controls.

[0084] The high-temperature exhaust gas generated by the engine is the primary heat source. The high-temperature exhaust gas is converted into heat energy by an exhaust gas boiler, and then converted into electrical energy by a thermal power generation system. This electrical energy is then fed into the ship's electrical system to supplement the power required by the ship's power grid. The system is equipped with an energy storage tank, which is mainly used to store the remaining primary heat source and provide heat energy when the demand is high.

[0085] By recovering and reusing the high-temperature waste heat emitted by ship engines, and combining it with onboard energy storage and smart technologies, the heat can be fully recovered and reused to meet the energy needs of users and ships, thereby maximizing the efficiency of ship heat utilization, reducing energy loss, and reducing ship emissions.

[0086] The secondary heat source utilizes a waste heat exchanger to recover heat energy from the engine cylinder liner water (i.e., using the waste heat exchanger to exchange heat with the cylinder liner water to achieve central cooling of the engine). This provides the necessary heat to users on board. When the primary heat source is sufficient, its heat energy is stored in an energy storage tank. When the cylinder liner water heat energy is insufficient, the heat in the storage tank is released to supplement the secondary heat source. The primary heat source prioritizes providing the necessary heat to users of the secondary heat source.

[0087] The system includes an auxiliary boiler and electric heating to supplement heat, forming a tertiary heating system. When the primary and secondary heating systems are insufficient to meet user needs, emergency heating will be provided via electric heating, while the auxiliary boiler will ensure a continuous heat supply to meet the needs of shipboard users and guarantee the stable operation of all systems.

[0088] The processing system is used to monitor heat and thermal energy demand in real time, predict and evaluate system parameters at various locations, and control various valves and equipment more promptly and efficiently. This ensures multi-level management and utilization of heat, reduces energy consumption of the entire ship system, saves costs, and provides tourists with a more comfortable environment for their visit.

[0089] The system manages waste heat from ship engines and controls different devices to meet users' real-time heat demands, saving energy to the maximum extent while satisfying both the ship's system heat requirements and the users' heat demands.

[0090] In this embodiment, the heat generated by the ship's power unit engine is fully recovered. The heat is managed, recovered, and reused through a processing system that handles different levels of heat. The system switches between different energy modes according to the ship's navigation conditions and the user's real-time actual needs, thereby meeting the customer's thermal energy requirements, reducing the ship's total fuel consumption, and improving the ship's energy efficiency.

[0091] Example 2

[0092] This embodiment provides a passenger ship that includes the passenger ship waste heat recovery system described in Embodiment 1. The passenger ship in this embodiment is equipped with a waste heat recovery system. By setting up a primary heat recovery module, the high-temperature waste heat emitted by the ship's engine can be recovered and reused. By setting up a secondary heat recovery module, the thermal energy of the cylinder liner water in the ship's engine can be recovered and reused, which greatly improves the ship's heat utilization efficiency, reduces energy loss, and reduces ship emissions.

[0093] Furthermore, by setting up different processing modules and switching modules, waste heat management of ship engines is realized, and different switches are controlled to meet the real-time heat demand of users, thereby saving energy to the maximum extent while meeting the heat demand of the ship system and users.

[0094] While specific embodiments of this disclosure have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this disclosure is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this disclosure, but all such changes and modifications fall within the scope of protection of this disclosure.

Claims

1. A waste heat recovery system for passenger ships, characterized in that, The waste heat recovery system includes: a heat energy generation module, a cooling module, a primary heat recovery module, and a secondary heat recovery module; The heat generation module is connected to the cooling module and the primary heat recovery module; The cooling module is connected to the secondary heat recovery module; The heat generation module is used to generate target energy and high-temperature exhaust gas; The cooling module is used to cool down the heat generation module when it generates the target energy, so as to generate a high-temperature coolant. The primary heat recovery module is used to convert the high-temperature waste gas into the target energy; The secondary heat recovery module is used to convert the high-temperature coolant into the target energy.

2. The passenger ship waste heat recovery system according to claim 1, characterized in that, The heat generation module includes an engine; The engine is used to generate the high-temperature exhaust gas; The primary heat recovery module includes a waste gas boiler, and the waste gas boiler includes a primary cooling water system. The waste gas boiler is used to heat the primary cooling water based on the high-temperature waste gas in order to generate the target energy.

3. The passenger ship waste heat recovery system according to claim 1, characterized in that, The cooling module includes a cylinder liner water unit; The cylinder liner water unit is used to cool the heat generation module to produce high-temperature liquid.

4. The passenger ship waste heat recovery system according to claim 3, characterized in that, The secondary heat recovery module includes a waste heat exchanger, which contains secondary cooling water. The waste heat exchanger is used to heat the secondary cooling water based on the high-temperature liquid to generate the target energy.

5. The passenger ship waste heat recovery system according to any one of claims 1-4, characterized in that, The target energy includes thermal energy; the thermal energy includes water vapor and hot water.

6. The passenger ship waste heat recovery system according to claim 5, characterized in that, The waste heat recovery system also includes: an energy storage module, a power generation module, and a usage module; The energy storage module is used to store the hot water; The power generation module is used to generate electrical energy based on the water vapor; The module is used to provide hot water to the target user.

7. The passenger ship waste heat recovery system according to claim 6, characterized in that, The waste heat recovery system also includes: a processing module and a switching module; The switching module is located between the primary heat recovery module and the energy storage module, between the primary heat recovery module and the power generation module, between the primary heat recovery module and the user module, and between the secondary heat recovery module and the cooling module; The processing module is used to control the switching module to open or close based on preset instructions.

8. The passenger ship waste heat recovery system according to claim 7, characterized in that, The waste heat recovery system also includes: an auxiliary heating module; The processing module is used to obtain the actual temperature of the energy storage module, and in response to the actual temperature being less than a preset temperature, to issue a first heating command; The auxiliary heating module is used to heat the water in the energy storage module to the preset temperature based on the first heating command.

9. The passenger ship waste heat recovery system according to claim 8, characterized in that, The auxiliary heating module includes an auxiliary boiler and an electric heating unit.

10. A passenger ship, characterized in that, The passenger ship includes the passenger ship waste heat recovery system as described in any one of claims 1-9.

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