612 results about "Water energy" patented technology

The invention relates to the technical field of pumped storage, and discloses a state detection method for a water energy storage unit, which comprises the following steps: S1, deploying vibration, temperature, electrical and pressure sensors on the water energy storage unit, collecting multi-dimensional operation data, and carrying out noise reduction, standardization and time sequence alignment; s2, multi-dimensional features of the data are extracted through tensor decomposition, local space information is acquired by using a convolutional neural network, and a time sequence relation is modeled in combination with a Transform model; and S3, constructing a sensor topological structure through the graph convolutional network. The multi-source data fusion technology is adopted, data of vibration, temperature, electrical and pressure sensors are processed in a unified mode, time sequence prediction and an intelligent fault detection algorithm are combined, comprehensive health monitoring of the water energy storage unit is achieved, the detection precision is improved, meanwhile, potential faults can be found in time, and compared with data monitoring of a single sensor in a traditional method, the method has the advantage that the monitoring accuracy is improved. And the problem of inaccurate identification caused by large and complex data volume is obviously solved.

The invention discloses a novel power system multi-target active and reactive power coordination optimization method and device, and relates to the technical field of novel power system optimization scheduling, and the method comprises the steps: building a multi-target active and reactive power coordination optimization model with the lowest total operation converted power loss and the optimal static stability index of a system as optimization targets, determining an electric network constraint condition; water energy storage active output, thermal power generating unit active output, wind power actual grid-connected power, photovoltaic actual grid-connected power, reactive compensation equipment capacity and converter reactive capacity are used as populations, and the lowest total operation converted power loss and the optimal static stability index of the system are used as population fitness. And generating upper and lower limits of population generation and upper and lower limits of population scheduling change in front and back time periods by using an electric network constraint condition, and solving a multi-target active and reactive coordinated optimization model by using a multi-target differential evolution algorithm. According to the method, the converted power loss and the static stability in a novel power system scheduling decision can be considered.

The invention relates to the technical field of intelligent early warning of a water energy storage unit, in particular to a rapid early warning system and method for the deterioration state trend of the water energy storage unit, and the system comprises a data collection module which is used for carrying out the real-time collection of the operation data of the water energy storage unit; the feature processing module is used for performing feature processing on the operation data of the water energy storage unit; the real-time monitoring module is used for constructing a real-time monitoring model and monitoring the degradation state of the water energy storage unit in real time; the degradation prediction module is used for constructing a degradation prediction model and predicting the degradation state trend of the water energy storage unit; the prediction adjustment module is used for adjusting the degradation prediction module; and the prediction optimization module is used for optimizing the prediction adjustment module, and the prediction optimization module is connected with the prediction adjustment module. According to the invention, the operation state of the water energy storage unit can be monitored and predicted in real time, and rapid early warning is carried out on the deterioration state trend, so that the operation reliability and the maintenance efficiency are improved.

The invention provides an island energy system optimization scheduling method considering ammonia-to-electricity waste heat power generation, and the method employs an independent island integrated energy system containing an ammonia-to-electricity system to execute a weekly-day-intra-day multi-stage operation optimization scheduling strategy, and the independent island integrated energy system is a system considering the ammonia supply demand. Wind energy and solar energy are used as energy input, energy is supplied to seawater desalination equipment and an electricity-to-ammonia system, and the electric load requirements of island residents are met; meanwhile, seawater desalination equipment is used as a power demand response resource to increase the water-energy coupling relationship of the system model, and cross-time storage and utilization of fresh water resources are realized through a reservoir, so that an ammonia-hydrogen power ship which is used for meeting daily travel demands of island residents is used as an ammonia load; an electricity-to-ammonia system and an ammonia storage tank are adopted to realize effective consumption of island wind and light resources; according to the invention, the long-period energy supply reliability of the island can be improved, and the problem of uncertainty of wind energy and light energy resources of the island can be effectively solved.

The invention relates to the technical field of water supply management, in particular to a self-generating ultrasonic remote water meter and a water supply management system, and aims to enhance automatic water supply adjustment and water energy optimization adjustment of the self-generating ultrasonic remote water meter water supply management system through an intelligent analysis process of user water consumption information. Comprising the steps that a remote transmission module sends a real-time user water volume data signal to a remote water supply control center through a wireless communication technology; the water supply module performs multi-dimensional data analysis according to the real-time user water volume data signal and judges the user water consumption change condition, and the remote water supply control center starts an automatic water supply strategy; the monitoring module obtains user water consumption conditions in a preset time period under the control of the automatic water supply strategy for monitoring and analysis, and user water consumption level information in the preset time period is obtained; and the judgment module judges whether water consumption of the user is abnormal or not according to the water consumption grade information of the user, generates a second early warning signal and pauses water supply treatment.

The invention discloses a hydropower station income risk measurement method based on hydraulic energy value, which comprises the following steps: S1, constructing a hydraulic energy value dynamic evaluation model, calculating the hydraulic energy available amount under different space-time scenes by combining a distributed hydrological model, converting the hydraulic energy available amount into an economic value, and obtaining a dynamic hydraulic energy value; s2, establishing a multi-risk factor coupling network, and calculating a synergistic effect weight between risk factors; s3, constructing an income risk dynamic prediction model, updating and predicting a power generation income probability distribution curve in a future preset time period in real time, and identifying a key risk source; s4, constructing a risk-income tradeoff decision matrix through a prediction result and a key risk source output by the income risk dynamic prediction model, and generating income optimization schemes under different risk coping strategies; and S5, displaying the dynamic water energy value, the income risk prediction result and the income optimization scheme by using a visual interface. Accurate evaluation of the dynamic water energy value and real-time prediction of the power generation income risk are achieved.

The invention discloses a low-water-head water turbine with a flow guide wing bionic blade, which is provided with a variable pitch system for adjusting an included angle between a runner blade and an incoming flow direction, and a deflection control system for adjusting an included angle between a guide vane arranged on a bulb body and the incoming flow direction, the water flow impact acting force on the blades can be changed through the water flow impact acting force, the water flow impact acting force on the blades can be changed through the water flow impact acting force, and the water flow impact acting force on the blades can be changed through the water flow impact acting force. In addition, the blade of the runner of the hydraulic turbine set is the blade with the wave-shaped front edge, and a section protruding outwards is arranged in a pipeline for containing the bulb body and the runner, so that the water energy utilization rate of the hydraulic turbine set is further increased. The blade adopts a sine curve-shaped waveform front edge, and the structure simulates a convex shape on a fin-shaped limb of an underwater organism, so that the resistance in water is reduced, and the water energy utilization rate of a water turbine set is increased.

The flushing system comprises a water tank, a first water pump, a water inlet device used for supplementing water to the water tank and a spraying nozzle, the water inlet end of the first water pump is communicated with the water tank, and the water inlet device is connected with a water supplementing pipe; the spraying nozzle is provided with a first spraying channel and a second spraying channel which are mutually independent, the first spraying channel is supplied with water by the first water pump, and the water inlet end of the second spraying channel is communicated with a water supplementing pipe of the water inlet device, so that when water enters the water inlet device, part of water can flow into the second spraying channel along the water supplementing pipe. High-pressure water generated by the first water pump during normal flushing can be prevented from flowing backwards along the water replenishing pipe, and the water replenishing mode is simple in structure, high in reliability and low in cost.

The invention discloses a thermal power plant intelligent circulating water energy-saving optimization system control method, relates to the technical field of thermal power plant automatic control, and aims to solve the technical problems of low control precision and large energy consumption of a traditional thermal power plant cold end system and realize optimization control by constructing an intelligent control system based on a Transform deep learning architecture. An intelligent weather data acquisition network is established, meteorological data, satellite meteorological data and a local microclimate sensor network are integrated, and high-precision space-time meteorological information is obtained; according to the method, a Transform encoder-decoder architecture is adopted, multi-source data is converted into a standardized token for representation, and complex association analysis is realized through a multi-head self-attention mechanism; a multi-objective collaborative optimization framework with an objective function as a core is constructed, a steam turbine-condenser-cooling tower-circulating water pump control closed loop is established, and seasonal adaptive control and robust optimization are achieved; providing decision transparent analysis, and explaining a control decision process through attention weight distribution.

The invention discloses an urban short-term water supply optimal scheduling method and device based on water-energy balance and a medium, and relates to the technical field of water supply scheduling optimizing.The method comprises the steps that a dynamic topological combination technology is utilized to construct a to-be-scheduled urban water supply system network diagram; extracting a water use sequence sample from the historical water use data of the urban water supply system to be dispatched as an input feature; using the water consumption prediction model and the water consumption prediction error determination model to obtain a water consumption prediction value of the next day; and inputting precipitation forecast information of the current day into the reservoir inflow prediction model to obtain a reservoir inflow prediction value of the next day, determining reservoir water storage change data of the next day, and finishing water consumption scheduling of the to-be-scheduled urban water supply system in combination with the scheduling model. The efficiency and rationality of urban daily water supply scheduling can be improved.

The invention discloses an integrated control method for a flood discharge gate of a hydropower station, relates to the technical field of water conservancy systems, and solves the technical problem that the opening degree of the gate cannot be adjusted according to the corresponding power generation efficiency, so that energy conversion of water resources is wasted in the flood discharge process. Whether corresponding gate opening work needs to be carried out or not is judged by comparing the current water level with the standard water level, water level early warning is carried out on the whole hydropower station through water level monitoring in the cycle time when gate opening is not needed, the overall safety is improved, and the water level early warning is carried out on the whole hydropower station according to the condition that gate opening is needed. The corresponding gate opening degree is calculated in combination with factors in multiple aspects, the corresponding power generation efficiency is calculated according to the gate opening degree, the power generation efficiency is analyzed and judged, comprehensive adjustment is further carried out according to historical data for unreasonable conditions, and the power generation efficiency is improved. The purpose of reasonable power generation can be achieved by reasonably utilizing water energy generated in the flood discharge process while flood discharge is conducted, and the purpose of reasonable utilization of resources is achieved.

The invention discloses a market-oriented hydropower station income risk assessment method, which comprises the following steps: S1, acquiring real-time hydrological data of a hydropower station drainage basin, constructing a hydroenergy income dynamic assessment model, establishing a dynamic mapping relationship between a hydroenergy value and a power generation income, and calculating the hydroenergy values in the current and future time periods; s2, identifying multi-dimensional risk factors influencing the income of the hydropower station; s3, determining the probability distribution of each risk factor, establishing a multi-source risk factor coupling model through a Copula function, and quantifying the comprehensive influence of the interaction between the risk factors on the income of the hydropower station; s4, performing random simulation on the power generation income of the hydropower station in a period of time in the future to generate a large number of income simulation samples; and S5, according to the income simulation sample, calculating a risk assessment index of the hydropower station income, and completing hydropower station income risk assessment of the hydropower station value. Dynamic quantitative evaluation, multi-dimensional risk interaction analysis and full-scene risk prediction of the income of the hydropower station are realized, and the timeliness and accuracy of income evaluation are improved.

The invention discloses an energy storage control system load optimization and emergency support control method, system and device. The method comprises the following steps: firstly, constructing a multi-level water head sensor network to monitor water head data in real time, and dynamically determining power generation duration based on a hydraulic model; thirdly, combining the power generation duration capacity and the unit efficiency characteristic curve, and using an optimization algorithm to obtain an optimal load distribution scheme; then, a start control strategy is constructed, unit start-stop and load regulation unified management is achieved through an automatic control algorithm of a computer monitoring platform, and the system operation state is obtained; according to the state, a support scheme is determined through a capacity calculation model, and different requirements of a power grid can be flexibly met; when the power grid is abnormal, a corresponding scheme is called and executed in time, normal operation of the power grid can be recovered quickly, safety and stability are guaranteed, and influences on users are reduced. The method establishes a perfect emergency response mechanism, improves the emergency processing capability of the power system, and effectively improves the water energy utilization efficiency and the power grid stability.

The utility model discloses an electric water heater, which comprises a container, a water inlet pipe, a water outlet pipe, a water inlet pipe, a water outlet pipe and a water outlet pipe, the water inlet pipe is mounted on the joint; the water inlet pipe comprises an outer pipe and an inner pipe, the outer pipe is provided with an outer pipe water outlet, the outer pipe water outlet and at least part of the outer pipe are located in the container, the part, located below the outer pipe water outlet, of the outer pipe is connected with the connector, and the inner pipe extends into the container through the connector through hole. The inner pipe is further provided with an inner pipe water outlet located above the inner pipe water inlet and the outer pipe water outlet, the inner pipe is detachably connected with the connector, and after the inner pipe is detached from the connector, water in the container can flow out through the outer pipe water outlet and the connector through hole. The water inlet assembly provided by the embodiment of the utility model not only has an anti-electricity function, but also is convenient for discharging water in the container through the drain pipe.

The invention discloses a cascade hydropower station optimal scheduling model construction and calculation method, and relates to the technical field of cascade hydropower station optimal scheduling model construction, and the method comprises the following steps: setting an initial scheduling line, and setting an initial scheduling line satisfying a constraint condition for each hydropower station according to analysis and judgment; through the dynamic optimization scheduling method, the cascade hydropower stations can optimize water resource distribution according to hydrological changes, power grid requirements and reservoir regulation capacity, the water energy utilization rate is increased, and abandoned water is reduced. Under the support of power grid load prediction, the output of a hydropower station is adjusted, the peak regulation capability is enhanced, and the stability of a power system is improved. A successive approximation dynamic programming algorithm is adopted, the calculation complexity of multi-reservoir joint optimization is reduced, the scheduling efficiency is improved, global scheduling is optimized in combination with an artificial intelligence algorithm, and the economical efficiency and reliability of cascade hydropower station operation are ensured.

The invention relates to a water pumping compressed gas phase change heat and energy storage system, and belongs to the technical field of energy storage power generation. The water pumping and gas compressing phase change heat and energy storage system comprises a water-gas co-containing tank, a water pumping generator set, a water storage tank, a phase change energy storage power generation subsystem and a current stabilizer, wherein the water pumping generator set is communicated with the water-gas co-containing tank; the water storage tank is communicated with the pumping generator set; the phase change energy storage power generation subsystem is communicated with the water storage tank and the water-gas co-containing tank, and water in the water storage tank enters the phase change energy storage power generation subsystem; the current stabilizer is installed on the phase change energy storage power generation subsystem. Therefore, according to the water pumping and gas compressing phase change heat storage and energy storage system, energy storage and power generation are achieved in one or more modes of water pumping energy storage and power generation, gas compressing energy storage and power generation and phase change energy storage and power generation, and a current stabilizer is arranged in the phase change energy storage and power generation subsystem to stabilize steam flow, so that the phase change energy storage and power generation subsystem can better store energy and generate power; the power generation effect is more stable, and the power generation efficiency is improved.

The utility model relates to the technical field of electric water heaters, and particularly discloses an electric water heater which comprises a container, a water inlet pipe, a water outlet pipe, a water outlet pipe and a water outlet pipe. The container comprises an upper container and a lower container, and the upper container is located above the lower container which is communicated with the upper container through a communication part; the water inlet pipe is used for supplying water to the container; the heating piece is used for heating water in the container; the drainage pipe is located in the container and connected with the container and / or the communicating part and / or the water inlet pipe, the drainage pipe is provided with a water outlet part and a water inlet part arranged on the peripheral wall of the drainage pipe, and the water outlet part is located above the water inlet part; water in the communicating part and / or water in the lower container can enter the drainage pipe through the water inlet part and flow to the upper container from the water outlet part. According to the scheme, the heat exchange efficiency between the upper container and the lower container of the electric water heater can be improved, and the production cost is effectively reduced.

The invention discloses a system and a method for strengthening corrosion of minerals by hot flue gas through coal seam zoning electroosmosis targeted water flooding, firstly, the hot flue gas is injected into a coal reservoir, CO2 of the hot flue gas displaces adsorbed gas in pores of the coal reservoir through a competitive adsorption effect, meanwhile, part of the CO2 is dissolved in water vapor of the hot flue gas and raw water in a coal body to form acidic water, and the acidic water is dissolved in water vapor of the hot flue gas; the acid water can corrode minerals in micropores of the coal reservoir to increase permeability of the coal body; when a water locking effect occurs in micropores of the coal reservoir, a high-voltage electric field is formed between every two adjacent drill holes, and the acidic water generates a targeted electroosmosis water driving effect under the action of the high-voltage electric field, so that the acidic water continuously moves in fractures of the coal reservoir in the direction of the electric field, and the water locking effect is broken; meanwhile, the acid water can promote multistage ionization of an acid medium in the solution to generate a large number of hydrogen ions under the action of electrified positive and negative electrodes, the mineral dissolution rate is increased, finally, the range and effect of hot flue gas on dissolution minerals in the coal reservoir are enlarged, and finally, the overall gas extraction efficiency of the coal reservoir is effectively improved.

The invention relates to the technical field of compressed air heat storage, in particular to a nitrogen constant-temperature and constant-pressure pressurized water energy storage system and a constant-pressure method. The system comprises a heat storage module, a constant-temperature and constant-pressure module and a pressure relief module. The heat storage module comprises a cold water tank, a heat exchange unit and a hot water tank which are sequentially connected, the cold water tank is connected with a normal-pressure water tank, and the hot water tank is connected with a nitrogen source. The constant-temperature constant-pressure module comprises a first temperature measuring instrument and a first nitrogen heater which are arranged on the cold water tank, and a second temperature measuring instrument and a second nitrogen heater which are arranged on the hot water tank. The pressure relief module comprises a first pressure measuring instrument arranged on the cold water tank, a second pressure measuring instrument arranged on the hot water tank and a water drainage loop connected with the cold water tank and the normal-pressure water tank. The cold water tank and the hot water tank are subjected to temperature monitoring and heating, so that the temperature of nitrogen in the tanks is kept stable, the pressure fluctuation of the system is reduced, the reliability of the system is improved, and the cost of the pressurized water storage tank is effectively reduced.

The utility model relates to the technical field of water source heat pump all-in-one machines, in particular to a water source heat pump all-in-one machine which comprises an all-in-one machine outer box, a fin type heat exchanger and a water inlet pipe, a portable cleaning mechanism is arranged on the side edge of the water inlet pipe, and a filtering protection mechanism is arranged on the side edge of the portable cleaning mechanism. Impurities entrained in underground water can be isolated through the arrangement of an isolation filter screen, and further, water flow is guided in different directions, so that when the water flow flows in the water inlet pipe, water energy can be converted into kinetic energy, and the impeller is driven to rotate; then, through transmission of an impeller, a limiting scraper can clean impurities accumulated on the outer wall of an isolation filter screen, and then underground water can be automatically filtered and cleaned when the device pumps water, so that the phenomenon that too many impurities enter the device to block the device is avoided, and the whole device is designed to be clean energy; and the energy-saving effect is excellent.

The invention belongs to the technical field of water conservancy and hydropower engineering, and particularly relates to an arrangement structure for achieving water diversion power generation at an old dam body opening and a construction method. The structure comprises a water retaining dam body, a water diversion flow channel, a water diversion water inlet, a water diversion emergency gate, a water diversion pressure pipeline, outer wrapped concrete, a volute front transition section, a concrete volute and an ecological unit plant; the water diversion flow channel is located below the dead water level of an upper reservoir area and formed by transforming an opening of a water retaining dam body. The water diversion inlet is located in the rear side of the water retaining dam body and combined with the water retaining dam body. The water diversion emergency gate is located in a gate groove of the water diversion inlet. Outer wrapped concrete is arranged around the water diversion pressure pipeline; the volute front transition section is located between the tail end of the water diversion pressure pipeline and the unit concrete volute. The ecological unit plant is located on the rear side of the water retaining dam body. Water diversion power generation is achieved through the local opening of the dam body, the ecological flow discharge requirement is met, water diversion power generation is achieved, water energy resources of a river channel are fully utilized, and remarkable economic benefits are generated for the society.

The invention discloses a deep learning-based scheduling behavior extraction method for a water-wind-light complementary system, and belongs to the technical field of complementary scheduling. Comprising the following steps: acquiring basic data of a water-wind-light complementary system, and screening out at least two kinds of data from the basic data to respectively serve as influence factors and decision variables of a scheduling behavior of the complementary system; the influence factors are input into a trained water-energy-electricity constraint coupled deep learning model, a target decision variable value is obtained, an extraction strategy of the scheduling behavior of the water-wind-light complementary system is established, and the extraction strategy of the scheduling behavior of the water-wind-light complementary system is a mapping relation between the influence factors and decision variables; wherein the deep learning model coupled with the water-energy-electricity constraint is a CNN-LSTM-FI model, and the extraction strategy of the scheduling behavior of the water-wind-light complementary system comprises a single-library mapping strategy and a multi-library mapping strategy. According to the method, the accuracy and efficiency of dispatching behavior extraction of the water-wind-light complementary system are improved.

The invention discloses a water conservancy project scheduling system based on artificial intelligence. The system comprises a water conservancy data monitoring module, a water level prediction module, a water conservancy scheduling module and a water conservancy power generation module. The water conservancy data monitoring module is used for monitoring and acquiring water conservancy data in real time and acquiring meteorological data in real time; the water level prediction module is used for acquiring historical water conservancy data and historical meteorological data, establishing a BP neural network model and acquiring predicted water level data; the water conservancy scheduling module is used for obtaining a first water conservancy scheduling strategy by using a particle swarm algorithm according to the predicted water level data, establishing a fluid simulation model according to the water conservancy scheduling strategy, and obtaining a second water conservancy scheduling strategy; and the hydroelectric power generation module is used for determining a hydroelectric power generation strategy by utilizing edge calculation, realizing intelligent hydraulic engineering scheduling, ensuring the feasibility of the hydraulic engineering scheduling strategy and the reliability of actual scheduling, supplying power to power supply users according to the hydroelectric power generation strategy, and being beneficial to fully utilizing water energy to generate power and improving the energy utilization rate.

The invention relates to a device for converting fluid kinetic energy into mechanical energy, provides a novel solution, optimizes and designs a plurality of derivative application schemes and functional parts which are close to those of practical products according to the working principle of the device, and summarizes some types and characteristics of composition layout and operation modes of the device. The fluid kinetic energy mainly comprises wind energy and water energy in the general environment, and the device can convert the fluid kinetic energy into mechanical energy for power generation or other purposes. According to the vertical shaft device, the stressed blades can automatically turn over, so that the moment of force of the central rotating shaft in the stressed semi-circumference and the non-stressed semi-circumference is unbalanced in the operation process, and the rotating shaft is pushed to rotate to obtain mechanical energy; the blades are arranged in a horizontal transverse manner and a vertical vertical manner, and even can be combined into a combined manner; three linkage structures are developed and designed through the transverse arrangement of the three linkage structures; a retractable type, a telescopic type and the like are designed to be applied to different environments; the method has unique advantages in certain environments and application conditions, and has a wide prospect.

The utility model discloses a plug seedling transport case which comprises a top cover, plug boxes and a base, the plug boxes are stacked between the top cover and the base, drain holes and water guide pipes are arranged on bottom plates of the plug boxes, the water guide pipes are used for being inserted into the drain holes, the plug boxes which are vertically adjacent are communicated through the drain holes and the water guide pipes, and a water tank is arranged in the base. A water outlet of the water tank is formed in the side wall of the base, a water inlet pipe is arranged on the top cover, the water outlet of the water tank is communicated with the water inlet pipe through a pipeline, and the water inlet pipe is used for being communicated with a water guide pipe; according to the utility model, the hole tray boxes which are stacked up and down are used for reserving enough height to accommodate hole tray seedlings, the water tank is arranged in the base, and water in the water tank can be pumped into the hole tray box which is stacked on the uppermost layer and then flows into each hole tray box layer by layer along the drain hole and the water guide pipe, so that the hole tray matrix in each hole tray box can absorb enough water, and the hole tray seedlings can be stored in the water tank. And redundant water flows back to the water tank, so that the plug matrix is prevented from being soaked in the water for a long time.

The invention provides a system of a pumped storage coupled compressed air energy storage underground gas storage with an air cushion type surge shaft and an operation method. The system comprises a compressed air energy storage system and a pumped storage system. The interior of the water-gas co-containing bin is divided into an upper-layer gas storage chamber and a lower-layer water storage chamber through a flexible material. The air inlet end of the compression system is communicated with the second air path; the air outlet end of the compression system is connected to the air inlet of the upper-layer air storage chamber through a first air path; a first air valve is mounted on the first air path; a gas outlet of the upper-layer gas storage chamber is connected to the expansion unit through a third gas path, and a second gas valve is mounted on the third gas path; and a detection sensor is mounted in the water-gas co-containing bin. The stability and economical efficiency of the compressed air energy storage are improved, the compressed air utilization rate is increased, the combined operation mode of compressed air energy storage and pumped storage is simplified, the combined dispatching mode of novel energy storage is optimized, and then the safety and reliability of pumped storage are improved.

Method of controlling a hot water energy storage system comprising an electrical heater for heating a volume of water, wherein the method comprises the steps of: - providing an electrical system comprising an electrical circuit and at least one load device, the electrical circuit being connected to an external electrical network such as a mains and to the at least one load device, wherein the electrical circuit comprises a main power input / output for connection to the external electrical network and a first power output for powering the at least one load device, and wherein the electrical circuit is provided with an overcurrent protection device, such as a circuit breaker, arranged between the power input / output and the first power output, wherein the overcurrent protection device is arranged to interrupt the current flowing though it when said current exceeds a predefined maximum current threshold; - providing the electrical heater in parallel to the at least one load device on the first power output; - monitoring the current at the first power output of the electrical circuit; - determining, based on the monitored output current and the predefined maximum current threshold, an unused current amount representative for an amount of current still allowable at the first power output without exceeding the predefined maximum current threshold; and - controlling the electrical heater on the basis of the determined unused current amount. An associated control system and a method of installing a hot water energy storage system in an existing system are also described.

The invention discloses a siphon power generation device which comprises a water storage pipe, a siphon located in the water storage pipe and a TENG power generation device located at the end of the siphon, and the TENG power generation device is located below the water storage pipe. One end of the siphon penetrates through the bottom of the water storage pipe to be communicated with the TENG power generation device, the other end of the siphon is located in the water storage tank, and the siphon sucks rainwater in the water storage pipe and conveys the rainwater to the TENG power generation device. The siphon power generation device is arranged in a rainwater pipe, so that the kinetic energy of rainwater on the roof can be effectively collected.

The embodiment of the invention provides a method for quantifying water energy resource loss caused by evaporation. The method comprises the following steps: acquiring meteorological information and water temperature information of a plurality of point locations in a preset time period of a reservoir; according to the meteorological information and the water temperature information of the multiple point locations, the average evaporation rate of the reservoir in the preset time period is determined; acquiring water storage and discharge conditions of the reservoir in a historical record, and determining a plurality of water areas of the reservoir in the historical record according to the water storage and discharge conditions in the historical record; correcting a water level area relation curve of the reservoir according to a plurality of water area areas of the reservoir which are historically recorded, and determining the water area of the reservoir in a preset time period according to the corrected water level area relation curve of the reservoir; determining the evaporation loss amount of the reservoir in the preset time period according to the average evaporation rate and the water area of the reservoir at the end of the preset time period; and according to the evaporation loss amount of the reservoir in the preset time period, determining the water energy resource power generation amount of the reservoir due to evaporation loss.

The invention discloses an electricity-water-hydrogen-heat coupled multi-energy ship optimal scheduling method. The method comprises the following steps: 1) establishing an objective function of an electricity-water-hydrogen-heat coupled multi-energy ship optimal scheduling model; 2) establishing ship navigation scheduling constraints of the electricity-water-hydrogen-thermal coupling multi-energy ship optimization scheduling model; 3) establishing ship equipment scheduling constraints of the electricity-water-hydrogen-heat coupling multi-energy ship optimal scheduling model, wherein the ship equipment scheduling constraints comprise ship photovoltaic, diesel generator, fuel cell, electric energy storage, water energy storage, hydrogen energy storage and heat energy storage scheduling constraints; 4) establishing an electricity-water-hydrogen-heat energy balance constraint of the electricity-water-hydrogen-heat coupling multi-energy ship optimization scheduling model; and 5) solving the power-water-hydrogen-heat coupled multi-energy ship optimal scheduling model to obtain a multi-energy ship scheduling scheme.