CN-122013216-A - Electrolytic hydrogen production electrolyte preheating system and method based on mixed heat source

CN122013216ACN 122013216 ACN122013216 ACN 122013216ACN-122013216-A

Abstract

The invention provides an electrolytic hydrogen production electrolyte preheating system and method based on a mixed heat source, which relates to the technical field of hydrogen production and comprises a photovoltaic power generation module, a wind power generation module, a power conversion module, a plurality of electrolytic tanks connected in parallel, an electrolyte circulation module, a heating module, a waste heat recovery module, a heat storage module and a hydrogen storage module, the power conversion module is used for supplying power to the electrolytic tank and the heating module based on the electric energy output by the photovoltaic power generation module and the wind power generation module, the waste heat recovery unit is used for recovering waste heat of the power conversion module and the hydrogen storage module, and the heating module, the waste heat recovery module and the heat storage module are matched to preheat electrolyte of the electrolytic tank, so that the device has the advantages of improving stability and economy of electrolytic hydrogen production in a renewable energy coupling scene.

Inventors

LI FENG
CHEN TAO
LI JUN

Assignees

山西国际能源集团储能股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260129

Claims (10)

1. The electrolytic hydrogen production electrolyte preheating system based on the mixed heat source is characterized by comprising a photovoltaic power generation module, a wind power generation module, an electric power conversion module, a plurality of electrolytic tanks connected in parallel, an electrolyte circulation module, a heating module, a waste heat recovery module, a heat storage module and a hydrogen storage module, wherein the electric power conversion module is used for supplying power to the electrolytic tanks and the heating module based on electric energy output by the photovoltaic power generation module and the wind power generation module, the waste heat recovery unit is used for recovering waste heat of the electric power conversion module and the hydrogen storage module, and the heating module, the waste heat recovery module and the heat storage module are matched to preheat electrolyte of the electrolytic tanks.
2. The method for preheating electrolytic hydrogen production electrolyte based on a mixed heat source according to claim 1, which is applied to the electrolytic hydrogen production preheating system based on a mixed heat source according to claim 1, comprising: reading power prediction data of the photovoltaic power generation module and the wind power generation module, running state signals of a plurality of parallel electrolytic tanks and electrolyte temperature data; determining a current operating mode based on the operating status signals of the plurality of parallel-connected electrolytic cells; Determining a current target temperature based on power prediction data of the photovoltaic power generation module and the wind power generation module; and controlling at least one of the heating module, the waste heat recovery module and the heat storage module based on the current working mode and the current target temperature, and preheating electrolyte of the electrolytic tank.
3. The method for preheating an electrolytic hydrogen production electrolyte based on a hybrid heat source according to claim 2, wherein determining the current operation mode based on the operation state signals of the plurality of parallel-connected electrolytic cells comprises: if the plurality of parallel electrolytic tanks are in a stop state, the current working mode is a full stop cold start mode; if a part of the plurality of parallel electrolytic cells is in a stop state, the current working mode is a part of operation hot standby mode.
4. The method for preheating an electrolytic hydrogen production electrolyte based on a hybrid heat source according to claim 3, wherein determining the current target temperature based on power prediction data of the photovoltaic power generation module and the wind power generation module comprises: predicting the total power of wind and light power generation based on power prediction data of the photovoltaic power generation module and the wind power generation module; If the total power of wind-solar power generation is greater than or equal to the power required by maximum hydrogen production, the current target temperature is the first target temperature; if the total power of wind-solar power generation is smaller than the basic load power, the current target temperature is a second target temperature, wherein the second target temperature is smaller than the first target temperature; If the total power of wind-solar power generation is smaller than the power required by the maximum hydrogen production and is larger than or equal to the base load power, determining the current target temperature based on a target temperature prediction algorithm.
5. The method for preheating an electrolytic hydrogen production electrolyte based on a hybrid heat source as claimed in claim 4, wherein determining the current target temperature based on a target temperature prediction algorithm comprises: Calculating a normalized output factor of the total wind-light power generation power relative to the basic load power and the maximum power generation capacity based on the total wind-light power generation power; And determining the current target temperature based on the normalized output factor by a linear interpolation method, wherein the current target temperature is smaller than or equal to the first target temperature and larger than or equal to the second target temperature.
6. The method for preheating electrolytic hydrogen production electrolyte based on a mixed heat source according to claim 5, wherein the normalized output factor of the total power of wind-solar power generation with respect to the base load power and the maximum power generation capacity is calculated based on the following formula: Wherein, the Normalized output factors of the total wind-solar power generation power relative to the basic load power and the maximum power generation capacity, For the total power of wind-solar power generation, As a function of the base load power, Is the maximum power generation capacity.
7. The method for preheating an electrolytic hydrogen production electrolyte based on a hybrid heat source as claimed in claim 5, wherein the current target temperature is determined based on the normalized output factor according to the following formula: Wherein, the As a result of the current target temperature, At the time of the second target temperature, Is the difference between the first target temperature and the second target temperature, The normalized output factor of the total wind-solar power generation power relative to the basic load power and the maximum power generation capacity is adopted.
8. The method for preheating an electrolytic hydrogen production electrolyte based on a mixed heat source according to any one of claims 2 to 7, wherein at least one of the heating module, the waste heat recovery module and the heat storage module is controlled based on a current operation mode and a current target temperature to perform preheating of the electrolyte of the electrolytic tank, comprising: when the current working mode is a full-shutdown cold start mode, controlling the heating module to preheat electrolyte of the electrolytic tank based on the current target temperature; The current working mode is a partially-running hot standby mode, and at least one of the heating module, the waste heat recovery module and the heat storage module is controlled based on the current target temperature to preheat electrolyte of the electrolytic tank.
9. The method for preheating an electrolytic hydrogen production electrolyte based on a hybrid heat source according to claim 8, wherein at least one of the heating module, the waste heat recovery module and the heat storage module is controlled based on a current target temperature to perform preheating of the electrolyte of the electrolytic tank, comprising: determining a total required thermal power based on the operating status signals of the plurality of parallel-connected electrolytic cells, the electrolyte temperature data and the current target temperature; If the residual heat power of the waste heat recovery module is greater than or equal to the total required heat power, controlling the waste heat recovery module based on the current target temperature to preheat electrolyte of the electrolytic tank; And if the residual heat power of the waste heat recovery module is smaller than the total required heat power, controlling the waste heat recovery module to cooperate with at least one of the heating module and the heat storage module based on the current target temperature, and preheating the electrolyte of the electrolytic tank.
10. The method for preheating an electrolytic hydrogen production electrolyte based on a hybrid heat source according to claim 9, wherein controlling the waste heat recovery module to perform the preheating of the electrolyte of the electrolytic tank in cooperation with at least one of the heating module and the heat storage module based on the current target temperature comprises: calculating a first power difference based on the remaining thermal power and the total required thermal power of the waste heat recovery module; residual heat power of the heat storage module is obtained; if the residual heat power of the heat storage module is larger than or equal to the first power difference value, controlling the waste heat recovery module to cooperate with the heating module based on the current target temperature to preheat electrolyte of the electrolytic tank; If the residual heat power of the heat storage module is smaller than the first power difference value, calculating a second power difference value based on the residual heat power of the heat storage module and the first power difference value, and controlling the residual heat recovery module to cooperate with the heating module and the heat storage module to preheat electrolyte of the electrolytic tank based on the current target temperature, the first power difference value and the second power difference value.

Description

Electrolytic hydrogen production electrolyte preheating system and method based on mixed heat source Technical Field The invention relates to the technical field of hydrogen production, in particular to an electrolytic hydrogen production electrolyte preheating system and method based on a mixed heat source. Background The water electrolysis hydrogen production technology is used as a key path for realizing large-scale and green hydrogen production, and has great development potential in application scenes of coupling renewable energy sources such as wind power, photovoltaics and the like. Conventional electrolyte preheating schemes typically rely on high-power electric heaters to directly heat the electrolyte. When restarting the system in a completely stopped state, the electric heater is started to instantly extract a large amount of electric energy. The process not only can impact a local power grid and influence the stable operation of the power grid, but also can obviously increase the start-stop energy consumption of the system, thereby improving the overall operation cost of the system and reducing the economy of the water electrolysis hydrogen production technology. When part of the existing electrolytic tanks in the system are in an operating state, auxiliary equipment such as a rectifying cabinet and an air compressor of the system can generate a large amount of low-grade waste heat. However, the conventional preheating scheme fails to effectively capture and utilize the waste heat, so that the energy is wasted, and the energy utilization efficiency of the system is further reduced. Therefore, it is desirable to provide a mixed heat source-based electrolytic hydrogen production electrolyte preheating system and method for improving the stability and economy of electrolytic hydrogen production in renewable energy coupling scenarios. Disclosure of Invention The invention provides an electrolytic hydrogen production electrolyte preheating system based on a mixed heat source, which comprises a photovoltaic power generation module, a wind power generation module, an electric power conversion module, a plurality of electrolytic tanks connected in parallel, an electrolyte circulation module, a heating module, a waste heat recovery module, a heat storage module and a hydrogen storage module, wherein the electric power conversion module is used for supplying power to the electrolytic tanks and the heating module based on electric energy output by the photovoltaic power generation module and the wind power generation module, the waste heat recovery unit is used for recovering waste heat of the electric power conversion module and the hydrogen storage module, and the heating module, the waste heat recovery module and the heat storage module are matched to preheat electrolyte of the electrolytic tanks. The invention provides an electrolytic hydrogen production electrolyte preheating method based on a mixed heat source, which comprises the steps of reading power prediction data of a photovoltaic power generation module and a wind power generation module, running state signals of a plurality of parallel electrolytic tanks and electrolyte temperature data, determining a current working mode based on the running state signals of the plurality of parallel electrolytic tanks, determining a current target temperature based on the power prediction data of the photovoltaic power generation module and the wind power generation module, and controlling at least one of a heating module, a waste heat recovery module and a heat storage module to preheat electrolyte of the electrolytic tanks based on the current working mode and the current target temperature. Further, the current working mode is determined based on the running state signals of the plurality of parallel electrolytic cells, wherein the current working mode is a full-stop cold start mode if the plurality of parallel electrolytic cells are in a stop state, and is a partial running hot standby mode if the plurality of parallel electrolytic cells are in a stop state. Further, the current target temperature is determined based on power prediction data of the photovoltaic power generation module and the wind power generation module, the current target temperature comprises the steps of predicting wind-light power generation total power based on the power prediction data of the photovoltaic power generation module and the wind power generation module, determining the current target temperature to be a first target temperature if the wind-light power generation total power is larger than or equal to power required by maximum hydrogen production, determining the current target temperature to be a second target temperature if the wind-light power generation total power is smaller than base load power, wherein the second target temperature is smaller than the first target temperature, and determining the current target temperature based on a target temperature predicti