169 results about "Water energy" patented technology

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 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 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.

1. The name of the design product: water lifting equipment (T6 megawatt water energy cycle power station). 2. The use of the design product: water hammer pump for water lifting. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

A water energy conversion device comprises a water damming assembly provided in a watercourse (6, figure 19) (e.g. river) and comprising a rectangular support frame 1 provided with a sheet metal shutt

The application relates to a cascade hydropower station power generation optimization scheduling method and device and computer equipment. The method comprises the following steps: according to historical wind power generation data, historical solar power generation data, historical water power generation data and power generation related parameters, estimated results of multiple resource parameters are calculated; according to the estimated results of the multiple resource parameters, an unbalanced risk constraint condition is constructed; the unbalanced risk constraint condition represents a constraint condition required to be met by monthly reservoir regulation of the cascade hydropower station in the case that wind power generation and solar power generation appear continuous shortages; under the constraints of the unbalanced risk constraint condition and system operation constraint conditions, a cascade hydropower station power generation optimization scheduling model is solved with the minimum operation cost as the target, and cascade hydropower station power generation scheduling results are obtained. The method can make up for the defect that the limited fluctuation ability of water power in cooperation with wind power and solar power in the month is ignored in the traditional annual reservoir power generation scheduling plan.

This invention relates to the field of clean energy power generation technology, and proposes a three-source coupled synergistic power generation device based on hydropower, gravity, and kinetic energy. The device includes a water storage tank, a wheel, an upper water tank, an upper water baffle, a closed-loop water tank pump system, a main shaft, counterweight grooves, counterweight blocks, high-pressure spherical bearings, buffer springs, and a dual-start transmission power generation assembly. The wheel diameter is unlimited and can be arbitrarily enlarged according to actual power demand. The wheel size is directly proportional to the output torque and power generation. The upper water tank is circularly arranged on the wheel. The closed-loop water tank pump system is installed on the upper side of the water storage tank. Multiple counterweight grooves are arranged in a circular array on both sides of the top water tank of the wheel. Multiple high-pressure spherical bearings are respectively installed at the bottom of each counterweight block. Multiple buffer springs are symmetrically installed on the upper and lower sides of each counterweight groove. This technical solution solves the problems of limited power output, single starting method, low energy conversion efficiency, and inability to operate with zero carbon emissions in traditional power generation equipment.

The application discloses a power plant water-energy-salt cascade reuse system for flue gas drying integrated coupling, to solve the problems of low resource utilization efficiency and high energy consumption in the zero discharge technology of power plant wastewater. Through the technologies of circulating cooling water cascade reuse, desulfurization wastewater efficient concentration treatment, desulfurization concentrated water flue gas drying treatment and intelligent monitoring and control unit, the efficient reuse of water, salt and energy in the wastewater is realized. The wastewater is treated through multiple membrane processes such as ultrafiltration, nanofiltration and reverse osmosis, so that the cascade water quality reuse for different purposes is realized. The calcium and magnesium ions are extracted through chemical precipitation and used as industrial raw materials, effectively alleviating the membrane pollution problem of subsequent processes. The high-salinity wastewater is dried by flue gas waste heat to produce industrial salt, realizing the recovery of salt resources. The system adopts an intelligent monitoring and control system, realizes real-time monitoring and automatic adjustment, optimizes the operation efficiency of each treatment unit and reduces energy consumption. The application realizes near-zero discharge of wastewater and efficient reuse of resources, and has significant economic and environmental benefits.

This utility model discloses a switching device, including a voltage comparison module electrically connected to an induction amplifier module, a water pump, and a power supply component. The power supply component supplies power to the power supply component, voltage comparison module, induction amplifier module, and water pump. The induction amplifier module senses the alternating electric field of the outdoor unit of the air conditioner and generates induced current and voltage. The voltage comparison module receives the signal from the induction amplifier module and controls the start and stop of the water pump. The beneficial effects of this utility model are that the induction amplifier module can determine whether the outdoor unit of the air conditioner is powered on and transmits the induced electrical signal to the voltage comparison module. The voltage comparison module compares the received signal voltage with a reference voltage to determine whether to supply power to the water pump. Furthermore, an alarm component can determine whether the water pump has malfunctioned and provide a buzzer warning. This device can automatically add or stop water supply based on the start and stop status of the outdoor unit of the air conditioner, thereby saving energy and water resources.

The present invention provides a novel inflatable hexagon shaped boat which can be used in different applications including recreational, emergency rescue usages or in water energy generation. The boat designed normally has an inflatable flat body with detachable battery- powered drive unit(s) and an inflatable / detachable seat on top of the boat body. These same shaped boats can be easily assembled together to form a larger boat or a floating platform. It is a portable and compact design with a unique hexagon shape for assembling and docking purposes.

The application provides a shell connecting structure, an electric appliance shell and an electric appliance, and relates to the technical field of electric appliance equipment. The main purpose is to solve the problem that the connecting part of a segmented shell is easy to be filled with water, and to help improve the compatibility and generalization rate of different product shells and reduce the processing cost of the shell. The shell connecting structure comprises an upper connecting plate and a lower connecting plate. The upper connecting plate is located above the lower connecting plate, and a water-blocking flow guide is arranged at the connecting part of the two. Water flowing into the water-blocking flow guide can be discharged through the outer side of the lower connecting plate. The electric appliance shell comprises a bottom plate and the above-mentioned shell connecting structure. The bottom plate is located on the inner side of the upper connecting plate, and the connecting part of the bottom plate and the upper connecting plate is higher than the water-blocking part. At least part of the area of the bottom plate is protruded downward and forms an inclined slope-shaped flow guide. The electric appliance comprises the above-mentioned shell connecting structure.

This invention discloses a water-energy coupled water resources planning method, apparatus, equipment, and medium. The method includes: collecting and processing historical index values ​​corresponding to water demand prediction for each water-using sector to obtain the upper and lower limits of each index for the planning year, and inputting them into a trained water demand prediction model to obtain the water demand interval prediction results for each water-using sector; collecting and preprocessing historical water resource availability and energy availability data; constructing a water-energy system coupling risk analysis model based on the Copula function to quantitatively analyze the coupling risk of the water-energy system, and setting four coupling risk scenarios: low, medium-low, medium-high, and high; constructing a multi-objective interval stochastic chance constrained programming model, which is decomposed into two deterministic sub-models; solving the two deterministic sub-models using a hybrid intelligent algorithm, and integrating the solution results to obtain and output the regional water resources optimization allocation results adapted to the four risk scenarios of low, medium-low, medium-high, and high.

The invention belongs to the technical field of hydroelectric power stations, and discloses a submersible hydroelectric power station with a reservoir tail desilting function, which comprises a dam body arranged at the river reach of the reservoir tail of a built reservoir, a liftable gate, a drain hole, a power generation assembly and a desilting structure, the dam body encloses the reservoir tail area of the built reservoir to form a first reservoir, the dam body encloses the secondary area to form a second reservoir, and the drainage hole is formed in a water outlet of the dam body; at least more than 25% of surplus water energy of the built reservoir can be reused through the arranged dam body, full load in the dry season and adjustable stable power generation in the wet season are achieved, the problem of waste of fall water energy in the full-dry season of the original reservoir is solved, the bottom of the submersible power plant is communicated with the second reservoir, and the water head can be directly used for driving the unit. The liftable gate accurately controls the water level difference, it is ensured that power can be generated in the full and dry periods, and the limitation that traditional secondary power generation is only available in the dry period is avoided. And the desilting problem is fundamentally solved, and the environment is protected.

The application provides a deep mine water energy power generation device. The deep mine water energy power generation device comprises a mine tunnel water storage pool, a bottom plate is arranged on the mine tunnel water storage pool, a water turbine is arranged on the bottom plate through first hexagonal head bolts, a backing plate is installed on the mine tunnel water storage pool through second hexagonal head bolts, a nozzle mechanism is installed on the backing plate through a first connecting structure, a hand electric speed regulator and a folding device are arranged on the nozzle mechanism, and an expansion joint is arranged on the nozzle mechanism. The deep mine water energy power generation device provided by the application converts the gravitational potential energy caused by the fluctuation of water flow into mechanical energy, and then converts the mechanical energy into electrical energy through electromagnetic induction principle. The excess electrical energy is stored as energy. When the peak electricity consumption period and the renewable new energy power generation are unstable, the stored energy is used for power generation, which effectively avoids the waste of electrical energy, ensures the stability of power supply, and improves the usability of renewable new energy power generation.

The utility model belongs to the field of energy and power engineering, and particularly relates to a circulating water energy efficiency conversion device which comprises an energy efficiency conversion pipeline body, a waterproof shell is fixedly installed on one side of the energy efficiency conversion pipeline body, a transmission hole is formed in one side of the energy efficiency conversion pipeline body, and a sealing rubber ring is fixedly installed on the inner side of the transmission hole. A transmission shaft is rotationally mounted on the inner side of the sealing rubber ring; the transmission shaft is fixedly sleeved with a hollow rotating disc, and six guide grooves are formed in one side of the hollow rotating disc. The positions of the blades can be adjusted by observing the flow of circulating water in a pipeline, when the flow of the circulating water fluctuates, the radial positions of the blades are adjusted to change the flow receiving area, it is ensured that the blades efficiently capture water flow energy, overload when the flow is too large or sudden reduction of efficiency when the flow is too small is avoided, and the output power of the device can be rapidly changed. Stable transition is achieved, and equipment is protected against impact.

This utility model belongs to the field of bridge pier safety protection and discloses a reinforcement device for bridge piers to resist erosion. It includes a permeable protective barrel, which is fitted around the bridge pier to form an annular cavity. The cavity is filled with a filler material tightly adhering to the outer wall of the bridge pier. The top of the permeable protective barrel is sealed with a concrete cover. The protective barrel is composed of multiple vertically spliced ​​prefabricated sections, each with multiple circumferential openings on its sidewalls. These openings allow water flow to partially penetrate rather than directly impact the bridge pier, effectively dispersing water energy and slowing down the downstream water flow velocity, thereby inhibiting sediment initiation and localized erosion. The filler material fits tightly against the bridge pier, providing lateral support and reinforcement, enhancing the overall stability of the bridge pier. The concrete cover and prefabricated section structure ensure the device's airtightness and modular convenience, facilitating construction, installation, and subsequent maintenance. This device can simultaneously achieve the dual goals of erosion prevention and bridge pier reinforcement, significantly improving the durability and safety performance of the bridge pier and avoiding the limitations of existing technologies with only single functions.

The invention discloses a hydropower station forebay constant water level control method, device and equipment and a medium, and relates to the technical field of hydroelectric generation automatic control. Querying a target steady-state mapping table according to the real-time forebay water level to determine target total power generation power required for maintaining the water level constant; whether the real-time forebay water level meets the execution condition of generator set start-stop operation or not is judged, and if yes, corresponding generator set start-stop operation is executed according to a preset efficiency priority strategy so as to adjust the target set combination participating in operation; and under the constraint of the target total power generation power, performing load distribution in the target unit combination by taking the minimum total water consumption of the system as a target so as to perform constant water level control on the forebay of the hydropower station. Through the means of distributing loads with the minimum overall water consumption of the system as the target under the constraint of the total power, the water energy utilization efficiency is maximized, and the problem that the operation efficiency of a unit is low is solved.

The invention discloses an integrated organic wastewater treatment system and method with an efficient iron powder recycling function. The system comprises a reaction containing cavity, a magnetic coupling driving assembly, an iron powder reciprocating recycling assembly and a control assembly. The magnetic coupling driving assembly comprises an impeller installed in the discharge pipe, the impeller is driven by water flow in the discharge pipe and drives a DaVinci rotating disc to rotate, an inner ring of incomplete gear and an outer ring of incomplete gear are arranged on the DaVinci rotating disc and meshed with a lead screw pinion located between the inner ring of incomplete gear and the outer ring of incomplete gear respectively, and the DaVinci rotating disc rotates in one direction. The lead screw pinion can periodically rotate forwards and backwards, so that the lead screw sliding table and the adsorption magnet which are mounted on the lead screw are driven to do linear reciprocating motion, and unreacted iron powder in the reaction containing cavity is recycled. According to the device, iron powder can be recycled while organic wastewater is effectively treated, the utilization rate of the iron powder is increased, water energy can be effectively utilized, and energy consumption is reduced.

The invention relates to the technical field of pumped storage, in particular to a pumped storage power station parameter optimization method based on a social emotion optimization algorithm. The method comprises the following steps: generating integer water energy parameters of the pumped storage power station in a preset range as individuals in an initial population; the water head change amplitude and the reservoir capacity difference of each individual serve as constraints, and a social evaluation value is determined based on the stored energy of the pumped storage power station; determining an emotion value of each individual based on whether each individual violates the constraint and the social evaluation value; updating each individual by adopting a grid jumping mechanism based on the emotion value of each individual; and repeating the process to obtain the water power parameters of the water pumping station. According to the method, it is guaranteed that the initial parameters meet the integer requirement, all the parameters are still integers in the optimization process, and the problem of constraint failure caused by rounding after optimization is avoided; and by constructing the constraint, the optimization direction can be guided, the optimization process can be accelerated, invalid calculation is reduced, and the constraint processing efficiency is improved.

The invention belongs to the technical field of water turbines, and particularly relates to a multi-stage adjustable vertical axis water turbine. The water turbine comprises two layers of water wheels which are arranged in a vertically stacked mode in the vertical direction, each layer of water wheel is provided with a plurality of resistance type blades, the two ends, in the length direction of the blades, of the blades are connected with end plates, and the water turbine further comprises a first adjusting unit and a second adjusting unit; the first adjusting unit is used for driving the two layers of blades to be separated or close to each other in the length direction of the blades so as to achieve interval adjustment of the two-stage structure. And the second adjusting unit is used for driving the two layers of water wheels to rotate relatively and circumferentially and realizing coaxial and synchronous rotation of the upper-layer blades and the lower-layer blades. Through ordered cooperation of the first adjusting unit and the second adjusting unit, flexible and reliable switching of the stage number of the water turbine between a single layer and two layers is achieved, water energy can be efficiently captured in a wide flow speed range, the problems of blade collision and clamping stagnation in stage number switching can be avoided, the operation integrity of equipment is guaranteed, and the service life is prolonged.

This invention discloses a tailrace channel for hydropower stations that can improve power generation, belonging to the field of hydropower engineering technology. It includes a channel, flow-disrupting piers, a water collection component, a screening unit, and a conversion component. Cofferdams are set at both ends of the channel to form water storage sections, and the tail end has a 1-meter drop from the river channel. Flow-disrupting piers guide the water flow into the water collection component, which uses the Venturi effect to accelerate the water flow and impact the impeller rotation. The conversion component converts the impeller rotation into reciprocating linear motion through a crank-connecting rod mechanism, and then converts it into unidirectional continuous rotation to drive the generator to generate electricity through a gear rack and overrunning clutch. The screening unit automatically filters and cleans debris. This invention can transform the tailrace channel into a secondary energy recovery system, recovering and utilizing the residual kinetic and potential energy still carried by the tailwater for regeneration, realizing the cascade utilization of hydropower resources, and increasing economic benefits without increasing the load on the upstream reservoir or the losses of the main generator units.

Three-in-one Machine System for Renewable Energy Harnessing This invention relates to a single machine system shared for wind energy harnessing, water potential energy harnessing and gravity storage. Two common turbines, each of which has multiple circular layers of blades or buckets and is installed on a common shaft and at either side of the machine, are developed for harnessing wind and water energy simultaneously. On each side of the machine, wind and water are fed from separate channels into a common direction-change tube. The common shaft is coupled with that of the machine through pairs of gearboxes to increase angular speed for running the machine more effectively. The water falls from high terrain to low terrain to gain speed while the wind is accelerated by using funnel shaped accelerator in wind tower to reach tens of metres per second for effective energy conversion. A lifting mechanism is installed in the system to fulfill the potential energy storage of concrete or other heavy blocks when there is neither wind nor water. The system could be modified for 1) harnessing wind energy only but can operate as a motor to drive mechanical loads when there is no wind; 2) harnessing water and wind energy at river or lakes’ side without gravity storage. Three-in-one Machine System for Renewable Energy Harnessing This invention relates to a single machine system shared for wind energy harnessing, water potential energy harnessing and gravity storage. Two common turbines, each of which has multiple circular layers of blades or buckets and is installed on a common shaft and at either side of the machine, are developed for harnessing wind and water energy simultaneously. On each side of the machine, wind and water are fed from separate channels into a common direction-change tube. The common shaft is coupled with that of the machine through pairs of gearboxes to increase angular speed for running the machine more effectively. The water falls from high terrain to low terrain to gain speed while the wind is accelerated by using funnel shaped accelerator in wind tower to reach tens of metres per second for effective energy conversion. A lifting mechanism is installed in the system to fulfill the potential energy storage of concrete or other heavy blocks when there is neither wind nor water. The system could be modified for 1) harnessing wind energy only but can operate as a motor to drive mechanical loads when there is no wind; 2) harnessing water and wind energy at river or lakes' side without gravity storage. 20 25 20 08 72 07 F eb 2 02 5 0 7 F e b 2 0 2 5 2 0 2 5 2 0 0 8 7 2 2 Upper lake Water conduit Low platform with slope on each side Water conduit U p p er la ke Lower lake Machine with turbines, shape change tubes, direction change tubes and wheels Lo w er la ke H2 H1 L1 L2 Wind tower Wind tower Lo w er la ke Vertical wells for gravity storage Machine with turbines, shape change tubes, direction change tubes and wheels High platform Siphonage tube H igh p latfo rm Figure 2a 2 Upper lake Siphonage tube Machine with turbines, shape change tubes, Water conduit direction change tubes and wheels H1 High platform L1 L2 H2 Lower lake Vertical wells for gravity storage Low platform with slope on each side Wind tower :: Water conduit Wind tower Machine with turbines, shape change tubes, direction change tubes and wheels Figure 2a 20 25 20 08 72 07 F eb 2 02 5 2 2 0 2 5 2 0 2 5 2 0 0 8 7 2 0 7 F e b L 2 H 2 : : : : : : W a t e r c o n d u i t : : H i g h p l a t f o r m : : U p p e r l a k e : : L o w e r l a k e : : : : : : : : L o w e r l a k e

The invention relates to the technical field of energy management and energy storage, in particular to a water energy storage dynamic energy analysis decision system based on application scene requirements, which comprises a water-based energy storage device, a data acquisition unit, a central processing unit and a system control unit. A dynamic energy demand prediction model is constructed, an energy storage and release instruction set is generated, accurate energy scheduling is realized, the system supports multi-energy cooperative control and remote manual intervention, and the energy utilization efficiency and the operation flexibility are remarkably improved. According to the invention, complex energy consumption requirements can be effectively met, the operation cost is reduced, and an efficient and economical energy management solution is provided for scenes such as building heating and refrigeration and industrial steam supply.

The present invention relates to a modular individual polygonal module grouping device of 5 to 9 sides (100) of wind or hydro energy comprising a wind or hydro block (10) with vertical axis and a cage (20) having the form of a right prism with polygonal base of 5 to 9 sides, in which said two bases (21a, 21b) are connected to each other at the level of their respective vertices (23a, 23b) by uprights (24) arranged so that each face (22) forms a panel open in its center for a passage of air through said face (22);and wherein said block (10) comprises a stage formed (11) by lower (12a) and upper (12b) plates that are superimposed in pairs, said plates (12a, 12b) being circular in shape, parallel to each other, and connected rigidly by blades (13), said block (10) being mounted for rotation inside said cage (20) such that the fluid exerts a stress on each of the blades (13) causing said block (10) to rotate about itself. Abbreviated figure: Figure 1;

The present application relates to a kind of automatic blow washing and drying device of steam turbine blade, including blow washing box, blow washing box includes the water collecting tank of bottom and the horizontal annularly arranged conveying channel of upper portion, the upper side of water collecting tank is fixedly connected with water leakage pedal, one side of water leakage pedal is fixed with cleaning water tank, the conveying channel of cleaning water tank is formed with the cleaning channel of isohypso-trapezoidal shape and is concave downwards above it;The conveying channel is inserted with several groups of blade hanger, blade hanger is connected in horizontal annular conveying chain belt, and conveying chain belt is arranged in conveying channel;Water leakage pedal on the side of cleaning water tank is fixed with several groups of water blowing mechanism opposite to blade hanger.This automatic blow washing and drying device can realize the automatic cleaning and water blowing of steam turbine blade, can effectively improve production efficiency, reduce the labor intensity of worker.

A rotary power generation device, comprising a rotating platform (1) and power generation assemblies (2). There are a plurality of power generation assemblies (2), and the power generation assemblies are uniformly arranged on the rotating platform (1). Each power generation assembly (2) comprises a generator (21), a transmission (22), a pendulum rod (23), and a pendulum bob (24); the pendulum bob (24) is connected at a right angle to an input shaft of the transmission (22) by means of the pendulum rod (23); an output shaft of the transmission (22) is connected to a rotor shaft of the generator (21); and once the rotating platform (1) rotates, the pendulum bob (24) swings under the action of gravity and a centrifugal force generated by the rotation of the rotating platform (1), and drives, by means of the pendulum rod (23) and the transmission (22), a rotor of the generator (21) to rotate to generate electricity. The device has high flexibility and adaptability, and can be adapted to different external power sources to effectively convert various external energy sources, such as wind energy, hydraulic energy, and mechanical energy, into electric energy, thereby realizing the diversified utilization of the energy sources and significantly improving the power generation efficiency.

The invention discloses a control system energy-saving environment cabin which comprises a cabin body, and a sealing door is hinged to the front face of the cabin body through hinges. By designing the air treatment circulating system, the air circulation path in the cabin is optimized, and the air in the cabin can be orderly guided to enter the condensation pipe for temperature and humidity treatment through the air gathering strip and the communicating pipe in combination with the arrangement of the back ventilation opening and the air extractor; according to the air circulation system, environmental parameter adjustment can be more efficiently achieved, the invalid operation time of equipment is shortened, the drying plates are recycled through hot air regeneration of the communicating pipe and moisture absorption of the circulating pipe drying plates and intelligent switching of the rotating disc, a resource recovery system is formed through the condensation pipe, the cooling fins, the water storage tank and other assemblies, and the energy consumption is reduced. The water energy waste is reduced. Compared with the prior art, all the assemblies cooperate in a closed-loop mode, energy consumption is lower, and control is intelligent and convenient.

The utility model discloses an electric water heater, including phase change gall and water gall, be provided with heating rod in water gall, and heating rod is used for heating the water in water gall, the phase change gall has the phase change material for heat storage and heat release, and the phase change gall still includes the heat exchange pipe who communicates with water gall, and the water that flows through heat exchange pipe can absorb heat from phase change material, can also release heat to phase change material, in the height direction of phase change gall, along the flow direction of water, at least partial heat exchange pipe is arranged from top to bottom, and the electric water heater still includes the circulation pipe who communicates water gall and heat exchange pipe, when heating rod works, and the hot water in water gall can circulate and flow between heat exchange pipe and water gall through circulation pipe. The electric water heater provided in the application embodiment can simplify the structure and manufacturing process of electric water heater, reduce manufacturing cost and use cost, realize efficient energy storage simultaneously, in addition, can also maintain the better heat exchange effect in the long term in the use process.