Multi-source driven absorption heat pump

Abstract

The multi-source driven absorption heat pump is characterized in that a solution sequentially passes through a hot water driven generator (1-2), a steam driven generator (2-2), an electric driven generator (3-2), a fuel gas driven generator (4-2) and an absorber (6); or the solution is divided into multiple paths which are connected in parallel, passes through the hot water driving generator (1-2), the steam driving generator (2-2), the electric driving generator (3-2) and the fuel gas driving generator (4-2), and passes through the absorber (6) after being converged; the medium-temperature heat source sequentially passes through the absorber (6) and the condenser (14); the low-temperature heat source passes through the evaporator (9); and a refrigerant water outlet of the condenser (14) is communicated with a refrigerant water inlet of the evaporator (9). According to the multi-source-driven absorption heat pump, hot water, steam, electricity and fuel gas can serve as driving sources, heat energy of the multiple driving sources is complementary, and the energy utilization rate is high.

Description

Technical Field

[0001] This application belongs to the technical field of absorption heat pumps, and particularly relates to a multi-source driven absorption heat pump. Background Technology

[0002] The first type of lithium bromide absorption heat pump is a highly efficient and energy-saving heat lifting device. It does not directly consume mechanical energy, but instead uses a high-temperature heat source as its driving force. Through the absorption and release cycle of water (refrigerant) by a lithium bromide solution, it absorbs heat from a low-temperature heat source, producing a greater quantity and higher grade of useful heat energy. Due to its environmentally friendly working fluid and ability to effectively utilize low-grade waste heat, it has been widely used in district heating, industrial production, and petrochemical industries.

[0003] With fluctuating energy prices and the advancement of "dual carbon" goals, the industrial and building sectors are placing higher demands on the flexibility, adaptability, and efficiency of energy utilization. In practical applications, multiple heat sources of different grades often coexist or alternate at user sites, such as natural gas, grid electricity, process steam, and industrial waste heat hot water. The market urgently needs a heat pump system that can flexibly adapt to and efficiently integrate multiple heat sources to reduce operating costs, ensure energy supply stability, and further improve overall energy efficiency.

[0004] Type I lithium bromide absorption heat pumps are mostly single-heat-source driven. Their core structure mainly consists of four components: generator, condenser, evaporator, and absorber. Typically, the generator is designed and optimized for a single, specific type of drive source.

[0005] Single-source driven Class I lithium bromide absorption heat pumps have the following disadvantages: 1. Poor adaptability and adjustment flexibility: The system has only one solution loop and one generator, and its design and operating parameters are "locked" to specific design conditions. When the temperature or flow rate of the driving source changes, or when the load (required heat) on the user side fluctuates, the system cannot structurally adjust the internal solution circulation. For example, under partial load, the entire solution loop still needs to circulate at full flow, resulting in a reduced solution concentration difference, poorer generation and absorption effects, and a coefficient of performance (COP) far lower than the design value in actual operation, leading to low energy utilization. 2. Insufficient energy utilization and inability to achieve multi-energy complementarity: The system is "tailor-made" for a single heat source. When multiple available heat sources exist at the user site (such as inexpensive industrial waste hot water and guaranteed gas supply), the system cannot utilize them simultaneously or flexibly and economically switch between different heat sources. This results in the waste of other low-cost or surplus heat sources, high system operating costs, and an inability to achieve optimized multi-energy complementarity. 3. Low system reliability: Since the entire heat pump system relies on a single drive source and a single generator, once the heat source supply is unstable or the generator fails, the entire heat pump system will shut down and will be unable to continue heating. It lacks redundancy and backup capabilities, which poses a high risk for occasions that require continuous heating. Summary of the Invention

[0006] Existing single-heat-source driven absorption heat pumps suffer from low adaptability to load changes, insufficient energy utilization, and a lack of redundancy backup capabilities.

[0007] To address the aforementioned problems, this application provides a multi-source driven absorption heat pump, comprising: Hot water driven generator, steam driven generator, electric driven generator, and gas driven generator; The solution is connected in series and passes through a hot water-driven generator, a steam-driven generator, an electric-driven generator, and a gas-driven generator in sequence, and then passes through an absorber; or the solution is divided into multiple parallel streams and passes through a hot water-driven generator, a steam-driven generator, an electric-driven generator, and a gas-driven generator, and then merges and passes through an absorber. The medium-temperature heat source passes through the absorber and condenser in sequence; The low-temperature heat source passes through the evaporator; The refrigerant water outlet of the condenser is connected to the refrigerant water inlet of the evaporator.

[0008] Furthermore, condensers include hot water-specific condensers, steam-specific condensers, electric-specific condensers, and gas-specific condensers; The refrigerant vapor outlet of the hot water driven generator is connected to the refrigerant vapor inlet of the hot water dedicated condenser; The refrigerant steam outlet of the steam-driven generator is connected to the refrigerant steam inlet of the steam-dedicated condenser; The refrigerant vapor outlet of the electrically driven generator is connected to the refrigerant vapor inlet of the electrically powered condenser; The refrigerant vapor outlet of the gas-driven generator is connected to the refrigerant vapor inlet of the gas-dedicated condenser; The refrigerant water flows in series, parallel, or a combination of series and parallel in dedicated condensers for hot water, steam, electricity, and gas. The medium-temperature heat source passes sequentially through an absorber, and then through a dedicated condenser for hot water, a dedicated condenser for steam, a dedicated condenser for electricity, and a dedicated condenser for gas; or, the medium-temperature heat source passes sequentially through an absorber, and then through each of the dedicated condensers for gas, electricity, steam, and hot water.

[0009] Furthermore, in the scheme where the solution is passed in series through a hot water-driven generator, a steam-driven generator, an electric-driven generator, and a gas-driven generator, and then through an absorber: A solution heat exchanger is provided between the concentrated solution pipeline connecting the solution outlet of the gas-driven generator and the solution inlet of the absorber, and the dilute solution pipeline connecting the solution outlet of the absorber and the solution inlet of the hot water-driven generator.

[0010] Furthermore, in the scheme where the solution is divided into multiple parallel circuits via a hot water-driven generator, a steam-driven generator, an electric-driven generator, and a gas-driven generator: A dedicated heat exchanger for hot water is installed between the concentrated solution pipeline and the dilute solution pipeline connecting the hot water drive generator and the absorber; A dedicated steam-solution heat exchanger is installed between the concentrated solution pipeline and the dilute solution pipeline connecting the steam-driven generator and the absorber. An electric heat exchanger is installed between the concentrated solution pipeline and the dilute solution pipeline connecting the electric drive generator and the absorber; A dedicated gas-fired solution heat exchanger is installed between the concentrated solution pipeline and the dilute solution pipeline of the gas-driven generator and the absorber.

[0011] Furthermore, it also includes: A refrigerant pump is used to distribute refrigerant water from the bottom of the evaporator onto the evaporator tube walls. A solution pump is located at the solution outlet of the absorber.

[0012] Furthermore, it also includes: The data acquisition module is used to collect and obtain the operating parameters of the multi-source driven absorption heat pump, the user-side demand load, the unit heat cost of each generator's corresponding drive source, and the supply of each drive source. The data processing module, connected to the data acquisition module, is used to formulate operating strategies based on operating parameters, user-side demand load, unit heat cost of each generator, and supply of each drive source. The PLC controller, connected to the data processing module, is used to issue commands to control the start-up, shutdown, and operating power of each generator according to the operating strategy. The execution drive module, connected to the PLC controller, is used to execute instructions and control the operation of the multi-source driven absorption heat pump.

[0013] Furthermore, the operating strategies include at least a single-drive-source strategy, a multi-drive-source complementary strategy, and an electric-thermal synergistic peak-shaving strategy.

[0014] Further, in step S, When the electric-heat coordinated peak shaving mode is selected: during the off-peak period of electricity prices, the electric drive generator is activated first; during the peak period of electricity prices, the electric drive generator is turned off, and the gas drive generator and the hot water drive generator are activated.

[0015] The above-described technical solution of the present invention has at least the following beneficial technical effects: The multi-source driven absorption heat pump in this application can utilize hot water, steam, electricity, and gas as driving sources. The heat energy of multiple driving sources complements each other, resulting in high energy utilization and high adaptability to load changes. It breaks the traditional dependence on a single heat source. Whether it is industrial waste heat (steam, hot water) or domestic electricity and gas, this heat pump can be adapted, greatly expanding the application range of the first type of lithium bromide heat pump and adding backup capability to heating. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or in the conventional technology, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a multi-source driven absorption heat pump with generators connected in series in one embodiment of this application.

[0018] Figure 2 This is a schematic diagram of the structure of a multi-source driven absorption heat pump with generators connected in parallel in one embodiment of this application.

[0019] Figure 3 This is a schematic diagram of a multi-source driven absorption heat pump with generators connected in series in another embodiment of this application.

[0020] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1-1. Hot water dedicated control module; 1-2. Hot water drive generator; 1-3. Hot water dedicated condenser; 101. High-temperature hot water inlet; 102. High-temperature hot water outlet.

[0021] 2-1. Steam-specific control module; 2-2. Steam-driven generator; 2-3. Steam-specific condenser; 201. Driven steam inlet; 202. Condensate outlet.

[0022] 3-1. Electric-specific control module; 3-2. Electric drive generator; 3-3. Electric-specific condenser; 301. Power interface.

[0023] 4-1 Gas-specific control module; 4-2 Gas-driven generator; 4-3 Gas-specific condenser; 401 Gas inlet; 402 Flue gas outlet.

[0024] 5. Solution heat exchanger; 5-1. Hot water dedicated solution heat exchanger; 5-2. Steam dedicated solution heat exchanger; 5-3. Electric dedicated solution heat exchanger; 5-4. Gas dedicated solution heat exchanger.

[0025] 6. Absorber; 601. Medium-temperature heat source inlet; 602. Medium-temperature heat source outlet; 7. Solution pump; 8. Refrigerant pump; 9. Evaporator; 901. Low-temperature heat source inlet; 902. Low-temperature heat source outlet; 10. Data acquisition module; 11. PLC controller; 12. Execution drive module; 13. Remote monitoring platform; 14. Condenser. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details are presented in the various embodiments of this application to facilitate a better understanding of the application. However, the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments. The division of the various embodiments below is for ease of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0027] like Figure 1 As shown in Figures 2 and 3, this application provides a multi-source driven absorption heat pump, driven by multiple heat sources, specifically including: The hot water driven generator 1-2 is equipped with a high-temperature hot water inlet 101 and a high-temperature hot water outlet 102, which uses hot water to heat the dilute solution and generate refrigerant vapor and concentrated solution.

[0028] The steam-driven generator 2-2 is equipped with a driving steam inlet 201 and a condensate outlet 202. It uses steam to heat the dilute solution to generate refrigerant steam and concentrated solution.

[0029] The electrically driven generator 3-2 uses electrical energy to heat a dilute solution, producing refrigerant vapor and a concentrated solution. Preferably, the electrically driven generator 3-2 is equipped with an electric heating element and a power interface 301. The solution is heated by electrical energy, and the solution comes into contact with the surface of the electric heating element by dripping, immersion, or spraying, and is heated intensely. Part of the refrigerant is converted into vapor and enters the condenser.

[0030] The gas-driven generator 4-2 uses the heat from the combustion of gas to heat a dilute solution, producing refrigerant vapor and a concentrated solution. The gas-driven generator 4-2 can be a direct-fired type, with a combustion chamber, a gas inlet 401, a flue gas outlet 402, and an air (oxygen) inlet inside or outside the generator. The gas burns in the combustion chamber, and the resulting high-temperature flue gas flows into the heating pipes inside the gas-driven generator 4-2, heating the solution applied to the outer wall of the heating pipes.

[0031] It should be noted that the aforementioned dilute and concentrated solutions refer only to the concentration comparison of the solutions entering and exiting each generator, not to a comparison of the concentrations between different generators. The solution is lithium bromide solution, and the coolant is water.

[0032] The solution can flow in multiple ways: Optionally, the solution is connected in series and sequentially passes through hot water-driven generator 1-2, steam-driven generator 2-2, electric-driven generator 3-2, and gas-driven generator 4-2. The solution is gradually heated and concentrated by hot water, steam, electricity, and gas to form a concentrated solution. Then, the concentrated solution enters absorber 6, absorbs refrigerant vapor from evaporator 9 to dilute and release heat, and after releasing heat, forms a dilute solution that flows back to the first generator in the series. It should be noted that the series connection order is not limited in this embodiment. A preferred series connection method is: hot water-driven generator 1-2, steam-driven generator 2-2, electric-driven generator 3-2, and gas-driven generator 4-2 connected in series.

[0033] Optionally, the solution is divided into multiple parallel streams and passes through hot water driven generator 1-2, steam driven generator 2-2, electric driven generator 3-2 and gas driven generator 4-2. After the multiple solutions merge, they enter absorber 6, where they are diluted to form a dilute solution. The solution is then divided into multiple streams and returned to water driven generator 1-2, steam driven generator 2-2, electric driven generator 3-2 and gas driven generator 4-2 respectively.

[0034] The medium-temperature heat source enters from the medium-temperature heat source inlet 601, passes through the absorber 6 and the condenser 14 in sequence, absorbs heat in the absorber 6 and the condenser 14, and flows out from the medium-temperature heat source outlet 602.

[0035] The low-temperature heat source enters from the low-temperature heat source inlet 901 and releases heat through the evaporator 9; the refrigerant water formed by condensation in the condenser 14 enters the evaporator 9 and flows out from the low-temperature heat source outlet 902.

[0036] The multi-source driven absorption heat pump in this application can use hot water, steam, electricity, and gas as driving sources. The heat energy of multiple driving sources complements each other, resulting in high energy utilization. It breaks the traditional dependence on a single heat source. Whether it is industrial waste heat (steam, hot water) or domestic electricity and gas, this heat pump can be adapted, greatly expanding the application range of the first type of lithium bromide heat pump.

[0037] The following specific embodiments are further illustrations of this application. The examples given do not represent all the implementation methods of this application; only some are used as examples for illustration. Specific embodiments are as follows: In one embodiment of this application, each generator is equipped with a dedicated condenser. Specifically, the condenser includes a hot water dedicated condenser 1-3, a steam dedicated condenser 2-3, an electric dedicated condenser 3-3, and a gas dedicated condenser 4-3. The refrigerant vapor outlet of the hot water driven generator 1-2 is connected to the refrigerant vapor inlet of the hot water dedicated condenser 1-3; the refrigerant vapor outlet of the steam driven generator 2-2 is connected to the refrigerant vapor inlet of the steam dedicated condenser 2-3; the refrigerant vapor outlet of the electric driven generator 3-2 is connected to the refrigerant vapor inlet of the electric dedicated condenser 3-3; and the refrigerant vapor outlet of the gas driven generator 4-2 is connected to the refrigerant vapor inlet of the gas dedicated condenser 4-3.

[0038] The refrigerant water generated by the hot water dedicated condenser 1-3, the steam dedicated condenser 2-3, the electric dedicated condenser 3-3, and the gas dedicated condenser 4-3 can flow in series and finally enter the evaporator 9.

[0039] The medium-temperature heat source sequentially passes through absorber 6, followed by dedicated condensers 1-3 for hot water, 2-3 for steam, 3-3 for electricity, and 4-3 for gas. Alternatively, the medium-temperature heat source sequentially passes through absorber 6, followed by dedicated condensers 4-3 for gas, 3-3 for electricity, 2-3 for steam, and 1-3 for hot water. Typically, the driving sources are hot water, steam, electric heating, and gas in sequence. The medium-temperature heat source absorbs heat from the refrigerant steam at increasingly higher temperatures, achieving a gradient temperature increase and avoiding heat waste.

[0040] like Figure 1 and Figure 3As shown, the flowing solution from the hot water driven generator 1-2, the steam driven generator 2-2, the electric driven generator 3-2, and the gas driven generator 4-2 connected in series passes through the absorber 6. A solution heat exchanger 5 is provided between the concentrated solution pipeline connecting the solution outlet of the gas driven generator 4-2 and the solution inlet of the absorber 6 and the dilute solution pipeline connecting the solution outlet of the absorber 6 and the solution inlet of the hot water driven generator 1-2, which is used to transfer the heat of the concentrated solution entering the absorber 6 to the dilute solution flowing out of the absorber 6.

[0041] like Figure 2 As shown, the solution is divided into multiple parallel streams passing through hot water-driven generator 1-2, steam-driven generator (2-2), electric-driven generator 3-2, and gas-driven generator 4-2. After merging, it passes through absorber 6. Each generator can form a separate loop with absorber 6. Therefore, heat exchangers are installed on the dilute solution pipeline and the concentrated solution pipeline between absorber 6 and each generator. Specifically: A dedicated heat exchanger 5-1 for hot water is installed between the concentrated solution pipeline and the dilute solution pipeline of the hot water driven generator 1-2 and the absorber 6; a dedicated steam heat exchanger 5-2 is installed between the concentrated solution pipeline and the dilute solution pipeline of the steam driven generator 2-2 and the absorber 6; a dedicated electric heat exchanger 5-3 is installed between the concentrated solution pipeline and the dilute solution pipeline of the electric driven generator 3-2 and the absorber 6; and a dedicated gas heat exchanger 5-4 is installed between the concentrated solution pipeline and the dilute solution pipeline of the gas driven generator 4-2 and the absorber 6.

[0042] In one embodiment of this application, the solution is connected in series to a hot water drive generator 1-2, a steam drive generator 2-2, an electric drive generator 3-2, and a gas drive generator 4-2.

[0043] In one embodiment of this application, when the solution is passed in parallel through multiple parallel streams of hot water driven generator 1-2, steam driven generator 2-2, electric driven generator 3-2, and gas driven generator 4-2, the concentration and temperature of the concentrated solution flowing out of each generator are not necessarily the same. If it enters the absorber 6 for further mixing, the operating conditions of the solution absorbing refrigerant vapor are prone to fluctuation. Therefore, in this embodiment, the concentrated solutions flowing out of each generator are mixed first before entering the absorber 6 to absorb refrigerant vapor. Specifically: The solution outlets of the hot water-driven generator 1-2, steam-driven generator 2-2, electric-driven generator 3-2, and gas-driven generator 4-2 are each connected to the absorber 6 via a flow equalization plate. The flow equalization plate includes four inlets, a fusion chamber, and one outlet. Each inlet is connected to one end of the fusion chamber via a set of diversion pipes, and the outlet is located at the other end of the fusion chamber. The concentrated solution from each generator enters from the corresponding inlet, and then each concentrated solution is diverted into the fusion chamber through multiple beam pipes. The concentrated solutions from different paths are diverted and then fused together, finally forming a concentrated solution of uniform concentration that enters the absorber 6 from the outlet.

[0044] Preferably, the multi-source driven absorption heat pump further includes: The refrigerant pump 8 is used to distribute refrigerant water from the bottom of the evaporator 9 onto the tube wall of the evaporator 9.

[0045] Solution pump 7 is located at the solution outlet of absorber 6.

[0046] In one embodiment of this application, the multi-source driven absorption heat pump is further provided with a central control system. The medium-pressure control system includes: a data acquisition module 10, a data processing module, a PLC controller 11, an execution drive module 12, and a remote monitoring module 13. The data acquisition module 10 is used to collect and obtain the operating parameters of the absorption heat pump, the user-side demand load, the unit heat cost of each generator's corresponding drive source, and the supply capacity of each drive source. The data processing module, connected to the data acquisition module 10, is used to formulate an operating strategy based on the operating parameters, the user-side demand load, and the unit heat cost of each generator. The PLC controller 11, connected to the data processing module, is used to issue commands to control the start-up, shutdown, and operating power of each generator after start-up according to the operating strategy. The execution drive module 12, connected to the PLC controller 11, is used to execute commands and control the operation of the absorption heat pump.

[0047] Preferably, the hot water drive generator 1-2 is equipped with a dedicated hot water control module 1-1, which includes a hot water valve group and a hot water control and regulation unit; the hot water valve group is used to control the on / off state and flow rate of hot water; the hot water control and regulation unit monitors the heating network supply status parameters such as hot water inlet temperature and flow rate in real time, and the parameter data is transmitted to the central control system; the hot water drive generator 1-2 achieves solution concentration through high-temperature hot water; the dedicated hot water condenser 1-3 condenses refrigerant vapor to achieve refrigerant water circulation.

[0048] The steam-driven generator 2-2 is equipped with a dedicated steam control module 2-1, which includes a steam valve assembly and a steam control and regulation unit. The steam valve assembly includes an electric regulating valve, a shut-off valve, a pressure reducing valve, and a steam trap. The pressure reducing valve ensures the steam pressure remains stable at the set value, and the steam trap automatically removes condensate. The steam control and regulation unit monitors parameters such as steam pressure, temperature, and flow rate in real time, controlling the heating amount by adjusting the opening of the steam valves. Parameter data is synchronized to the central control system. The dedicated steam generator uses a steam heat source to concentrate the solution; the dedicated steam condenser 2-3 condenses the refrigerant steam to achieve refrigerant water circulation.

[0049] The electric-driven generator 3-2 is equipped with a dedicated electrical control module 3-1, which consists of an electric valve group and an electric control regulating unit. The electric valve group integrates key electrical control components such as electric heating relays, power switching valves, and power regulating units. The electric heating relay group uses multiple sets of high-power contactors or solid-state relays to implement a tiered switching control strategy. The power switching valve uses a soft starter to achieve smooth startup and limit the starting current, avoiding high current surges to the power grid and heating elements. The power regulating unit, based on tiered switching, uses phase angle control or zero-crossing triggering to precisely and steplessly regulate the current, achieving fine-tuning of heating power and quickly responding to load commands from the central control system. The electric control regulating unit is equipped with a monitoring system and multiple electrical protection modules. The monitoring system includes a high-precision platinum resistance temperature sensor to monitor the solution and heating element wall temperature; a pressure sensor to monitor the generator's internal pressure; and a liquid level sensor to ensure the solution immersion height. The multiple electrical protection modules include short-circuit protection, overload protection, leakage protection, phase loss protection, and over-temperature, over-pressure, and low liquid level interlocking shutdown to ensure absolute safety. The electric-driven generator 3-2 is equipped with an electric heating element, electrode device, or electromagnetic device for converting electrical energy into heat energy. The dedicated electric condenser 3-3 condenses refrigerant vapor to achieve refrigerant water circulation.

[0050] The gas-driven generator 4-2 is equipped with a dedicated gas control module 4-1, which includes a gas valve assembly comprising a safety shut-off valve, an electric regulating valve, a gas filter, and a pressure regulating valve. The safety shut-off valve quickly cuts off the gas supply in abnormal situations (such as flameout or abnormal pressure). The gas control and regulation unit monitors gas flow, inlet pressure, burner flame status, flue gas temperature, and composition in real time, ensuring efficient and safe combustion. All parameters are transmitted to the central control system.

[0051] The data acquisition module 10 is communicatively connected to the dedicated hot water control module 1-1, the dedicated steam control module 2-1, the dedicated electric control module 3-1, and the dedicated gas control module 4-1 to acquire the operating parameters of each generator. The central control system can independently control, coordinate the operation of the four generators, and handle emergency faults. Preferably, the operating strategy includes at least a single-drive-source strategy, a multi-drive-source complementary strategy, and an electric-thermal coordinated peak-shaving strategy.

[0052] Preferably, a single-drive-source strategy is employed: when a certain drive source has a stable supply, low unit cost, or only partial load is required, the PLC controller 11 only opens the valve group of the corresponding generator, while other generators only circulate the solution and do not perform thermal drive. For example, during off-peak electricity prices, only the electric-driven generator 3-2 is activated; when there is a stable supply of industrial steam, only the steam-driven generator 2-2 is activated, maximizing the utilization of a single low-cost heat source.

[0053] Preferably, a multi-source complementary strategy is adopted: based on the real-time unit heat cost of each driving source and the user load demand, the total cost is minimized while meeting the load demand. For example, when the user load demand is high, or when it is necessary to balance the cost and efficiency of multiple heat sources, the PLC controller 11 calculates the optimal output ratio of each module according to the real-time quality (temperature) and unit heat cost of each driving source, as well as the total user load demand, through a built-in optimization algorithm. Then, two or more modules are started simultaneously, and the heating capacity of each module is precisely allocated by adjusting the opening of the valve group corresponding to each generator, so that the total output accurately matches the total user load demand. During the peak heating period, the gas-driven generator 4-2 (base load) and the hot water-driven generator 1-2 (peak load) can be started simultaneously. The PLC controller 11 dynamically allocates the output of the two, reducing the total operating cost while ensuring heating.

[0054] Preferably, the electric-heat coordinated peak-shaving strategy is as follows: during the off-peak period of electricity prices, the electric drive generator 3-2 is activated first and its output is maximized; during the peak period of electricity prices, the electric drive generator 3-2 is turned off and the gas drive generator 4-2 and the hot water drive generator 1-2 are activated.

[0055] Preferably, the data acquisition module 10 monitors the status of each component in real time. Once a fault signal is detected, it immediately reports to the PLC controller 11. The PLC controller 11 then immediately sends a command to the generator corresponding to the faulty component, cutting off the valve group and branch solution valve of the faulty module to isolate it. Simultaneously, the PLC controller 11 automatically starts one or more standby generators that are currently off, according to the priority of the preset operating strategy, and adjusts their output to compensate for the capacity loss of the faulty generator. This achieves seamless switching, greatly improving the reliability and stability of continuous heat pump operation.

[0056] Preferably, the remote monitoring platform 13 displays the heat pump operating parameters, overall heat pump performance curves, energy consumption data and fault alarm information in real time through a graphical interface, and supports remote manual switching of control strategies and adjustment of operating parameters, thereby improving the convenience and timeliness of operation and maintenance.

[0057] In this application, the failure of a single generator has a minimal impact on the operation of other generators. Combined with a "fault emergency switching" strategy, the system can achieve non-stop maintenance, making it particularly suitable for industrial and civil scenarios with high requirements for continuous heating. Furthermore, the control method covers the vast majority of operating conditions, has a high degree of automation, and lowers the technical threshold for operators. Remote monitoring functionality allows experts to diagnose problems and adjust parameters without on-site presence, saving on operation and maintenance costs.

[0058] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this application and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this application should be included within the protection scope of this application. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A multi-source driven absorption heat pump, characterized in that, It includes a hot water driven generator (1-2), a steam driven generator (2-2), an electric driven generator (3-2), and a gas driven generator (4-2). The solution is connected in series and passes through a hot water-driven generator (1-2), a steam-driven generator (2-2), an electric-driven generator (3-2), and a gas-driven generator (4-2) in sequence, and then passes through an absorber (6); or, the solution is divided into multiple parallel streams and passes through a hot water-driven generator (1-2), a steam-driven generator (2-2), an electric-driven generator (3-2), and a gas-driven generator (4-2), and then merges and passes through an absorber (6). The medium-temperature heat source passes through the absorber (6) and the condenser (14) in sequence. The low-temperature heat source passes through the evaporator (9); The refrigerant water outlet of the condenser is connected to the refrigerant water inlet of the evaporator (9).

2. The multi-source driven absorption heat pump according to claim 1, characterized in that, The condenser (14) includes a hot water dedicated condenser (1-3), a steam dedicated condenser (2-3), an electric dedicated condenser (3-3), and a gas dedicated condenser (4-3). The refrigerant vapor outlet of the hot water driven generator (1-2) is connected to the refrigerant vapor inlet of the hot water dedicated condenser (1-3); The refrigerant steam outlet of the steam-driven generator (2-2) is connected to the refrigerant steam inlet of the steam-dedicated condenser (2-3); The refrigerant vapor outlet of the electric-driven generator (3-2) is connected to the refrigerant vapor inlet of the electric dedicated condenser (3-3); The refrigerant vapor outlet of the gas-driven generator (4-2) is connected to the refrigerant vapor inlet of the gas-dedicated condenser (4-3); The refrigerant water flows in series, parallel, or a combination of series and parallel in the dedicated condenser for hot water (1-3), dedicated condenser for steam (2-3), dedicated condenser for electricity (3-3), and dedicated condenser for gas (4-3); The medium-temperature heat source passes through the absorber (6) in sequence, and the hot water dedicated condenser (1-3), the steam dedicated condenser (2-3), the electric dedicated condenser (3-3), and the gas dedicated condenser (4-3); or, the medium-temperature heat source passes through the absorber (6) in sequence, and the gas dedicated condenser (4-3), the electric dedicated condenser (3-3), the steam dedicated condenser (2-3), and the hot water dedicated condenser (1-3).

3. The multi-source driven absorption heat pump according to claim 2, characterized in that, In the scheme where the solution is connected in series and passes through a hot water-driven generator (1-2), a steam-driven generator (2-2), an electric-driven generator (3-2), and a gas-driven generator (4-2), and then through an absorber (6): A concentrated solution pipeline connecting the solution outlet of the gas-driven generator (4-2) and the solution inlet of the absorber (6) is provided with a solution heat exchanger (5) between the concentrated solution pipeline connecting the solution outlet of the absorber (6) and the solution inlet of the hot water-driven generator (1-2).

4. The multi-source driven absorption heat pump according to claim 1, characterized in that, In the solution configuration, the solution is divided into multiple parallel circuits connected through a hot water-driven generator (1-2), a steam-driven generator (2-2), an electric-driven generator (3-2), and a gas-driven generator (4-2): A dedicated hot water solution heat exchanger (5-1) is provided between the concentrated solution pipeline and the dilute solution pipeline connecting the hot water drive generator (1-2) and the absorber (6). A dedicated steam-driven solution heat exchanger (5-2) is provided between the concentrated solution pipeline and the dilute solution pipeline connecting the steam-driven generator (2-2) and the absorber (6). An electric dedicated solution heat exchanger (5-3) is provided between the concentrated solution pipeline and the dilute solution pipeline of the electric drive generator (3-2) and the absorber (6). A dedicated gas-fired solution heat exchanger (5-4) is provided between the gas-driven generator (4-2) and the absorber (6) concentrated solution pipeline and dilute solution pipeline.

5. The multi-source driven absorption heat pump according to claim 1, characterized in that, Also includes: A refrigerant pump (8) is used to distribute the refrigerant water at the bottom of the evaporator (9) onto the tube wall of the evaporator (9); Solution pump (7) is located at the solution outlet of absorber (6).

6. The multi-source driven absorption heat pump according to claim 1, characterized in that, Also includes: The data acquisition module (10) is used to collect and obtain the operating parameters of the multi-source driven absorption heat pump, the demand load on the user side, the unit heat cost of the driving source corresponding to each generator, and the supply of each driving source. The data processing module is connected to the data acquisition module (10) and is used to formulate operating strategies based on operating parameters, user-side demand load, unit heat cost of each generator and supply of each drive source. The PLC controller (11) is connected to the data processing module and is used to issue commands to control the start-up, shutdown and operating power of each generator according to the operation strategy. The execution drive module (12) is connected to the PLC controller (11) and is used to execute instructions to control the operation of the multi-source driven absorption heat pump.

7. The multi-source driven absorption heat pump according to claim 6, characterized in that, The operating strategies include at least a single-drive-source strategy, a multi-drive-source complementary strategy, and an electric-thermal synergistic peak-shaving strategy.

8. The control method according to claim 7, characterized in that, In step S2, When the electric-heat coordinated peak shaving mode is selected: during the off-peak period of electricity price, the electric drive generator (3-2) is activated first; during the peak period of electricity price, the electric drive generator (3-2) is turned off, and the gas drive generator (4-2) and the hot water drive generator (1-2) are activated.

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