77 results about "Thermal stratification" patented technology

A liquid hydrogen storage tank capable of eliminating thermal stratification with low turbulence relates to the field of liquid hydrogen storage and comprises a tank body and a spray rod mechanism arranged in the tank body, the spray rod mechanism is communicated with a liquid hydrogen circulation pipeline, and liquid hydrogen in the tank body is extracted by the liquid hydrogen circulation pipeline and sprayed to a heat leakage point through the spray rod mechanism. The spray rod mechanism comprises a main guide pipe and a plurality of branch guide pipes, the tail ends of the branch guide pipes are provided with distribution assemblies attached to the heat leakage points, and the distribution assemblies are of structures defined by elastic metal wire meshes and filled with porous media, so that liquid hydrogen is dispersed and sprayed to the heat leakage points through the porous media, and turbulence of the liquid hydrogen is reduced. The spray rod mechanism is arranged in the storage tank, and the liquid hydrogen is directly sprayed to the heat leakage point by utilizing the guide pipe and the distribution component of the spray rod mechanism, so that turbulence of the liquid hydrogen in the tank is reduced, and evaporation of the liquid hydrogen caused by heat leakage is slowed down.

The invention provides an intelligent integrated control system for waste heat recovery of a swimming pool heat pump and domestic hot water. The system comprises a data acquisition module, an energy efficiency evaluation and recovery decision module, an intelligent scheduling execution module and a heating mode optimization module. The waste heat availability is dynamically evaluated by monitoring heat pump operation parameters and the water tank thermal stratification state in real time, the system stability is judged in combination with the heat pump energy efficiency change trend and the water tank top temperature acceleration, and a three-way valve is intelligently controlled to switch a waste heat preheating path. In the waste heat recovery state, the waste heat participation degree is determined based on the temperature difference and flow of the plate heat exchanger, the main heating power is adjusted by combining the up-down temperature difference and the top temperature change trend of the water tank, and efficient, stable and energy-saving domestic hot water supply is achieved. The energy comprehensive utilization efficiency is remarkably improved, carbon emission is reduced, and the system is suitable for green buildings and smart energy scenes.

The invention discloses a high-low temperature heat storage single-tank device with a composite partition plate. The problems that an existing single-tank heat storage system is thick in thermocline, single in partition plate performance, poor in disturbance rejection and the like are solved. The device comprises a cylindrical tank body, a composite partition plate system, a driving mechanism, a matched pipeline and a heat exchange system, the composite partition plate is composed of a high-temperature phase-change material, a middle heat insulation layer and a low-temperature phase-change material, heat transfer between high-temperature media and low-temperature media is restrained through a thermal delay mechanism, and the dynamic disturbance resistance is enhanced through the movable partition plate. The device can reduce the thickness of the thermocline, improve the heat storage efficiency and stability, reduce the driving energy consumption and cost, is suitable for the scenes of solar thermal power generation, industrial waste heat recovery, ship heat storage and cold storage and the like, and can provide continuous and stable clean energy.

The invention discloses a single-tank heat / cold storage system based on phase change flow equalizing plates, the phase change flow equalizing plates are arranged at the top, the bottom and the middle position in a tank body, are composed of internal phase change materials and flow equalizing plate shells, effectively regulate and control a fluid flowing path and temperature fluctuation, realize coupling distribution of a fluid field and a temperature field, and form a stable thermocline structure. The operation mode of the system is as follows: when the heat / cold capacity of the heat / cold source side is sufficient, the system can directly supply heat / cold to a user through heat transfer fluid, and meanwhile, redundant heat / cold capacity can be stored in the tank body and the phase change flow equalizing plate; and when the heat / cold quantity is insufficient, the tank body and the phase change flow equalizing plate release the heat / cold quantity to a user. The phase change material and the flow equalizing plate are combined to develop the phase change flow equalizing plate, the phase change flow equalizing plate is applied to a single-tank heat / cold storage system, the temperature uniformity in a heat / cold storage tank body is improved, the heat storage capacity is improved, and the phase change flow equalizing plate has good flow field disturbance regulation and control capacity and heat stratification stability maintaining capacity and is simple in structure and wide in application scene.

The invention discloses an air conditioner heating temperature compensation method, device and equipment and a medium. The method comprises the steps that if the air conditioner enters a heating mode, the indoor environment temperature, the indoor air outlet temperature, the indoor set temperature and the current freeze-frame air sweeping position of an air deflector are obtained, and the initial heating compensation temperature is determined through a preset temperature compensation model according to the current freeze-frame air sweeping position of the air deflector, the preset temperature compensation model is constructed based on the corresponding relation between the freeze-frame air sweeping position of the air deflector and the operation angle of the air deflector; judging whether the running time of the air conditioner reaches a preset running time threshold value or not; and if yes, the initial heating compensation temperature is corrected through a preset compensation temperature correction model according to the indoor environment temperature, the indoor air outlet temperature and the indoor set temperature, and the target heating compensation temperature is determined. Through a dual temperature compensation mechanism, thermal stratification is effectively restrained, comfort is improved, and energy consumption is reduced.

The utility model discloses a single-phase medium heat storage tank, which relates to the technical field of heat storage tanks and comprises a tank body. A heat insulation plate is arranged in the tank body; the heat insulation plate comprises a heat insulation plate shell and a heat insulation material, wherein an upper pressure sensor and a lower pressure sensor are arranged on the upper side and the lower side of one end of the heat insulation plate respectively; an upper water distributor is arranged at the top of the inner side of the tank body; the upper water distributor is connected with the hot water inlet and outlet; a lower water distributor is mounted at the bottom of the tank body in a matched manner; one end of the lower water distributor is connected with the cold water inlet and outlet; in the energy storage process, the system can store heat energy or cold energy in the heat storage tank in the form of hot water or cold water, the hot water and the cold water are separated through movement of the heat insulation plate, heat transfer caused by existence of a thermocline is eliminated, and the energy utilization efficiency is further improved.

The application discloses a kind of static water pressure simulation device and pressure sampling method with pressure, it is related to sediment-water interface biogeochemical process simulation technical field, the application includes container cylinder, top sealing installation has sealing cylinder cover;Pressure gauge and temperature table are located on sealing cylinder cover;Air inlet assembly and air release assembly are located on sealing cylinder cover;Discharge pipe is located in the lower part of container cylinder, and first control valve, sampling tube, second control valve are sequentially connected in series.The application has broken through to realize the sampling without pressure relief under the condition of in-situ static water pressure, effectively avoids systematic error caused by dissolved gas due to decompression escape;It is suitable for a variety of sediment types and gas types, and provides a high-fidelity experimental platform for greenhouse gas emission research under extreme conditions of deep water reservoir, thermal stratification area;Provide key data support and methodological basis for constructing pressure-corrected methane flux model and deep water carbon emission inventory, serve the national "double carbon" strategy and global change research needs.

The present application relates to the technical field of nuclear reactor thermal hydraulic simulation analysis, and provides a thermal stratification phenomenon simulation method and apparatus, a device, a medium, and a program product. The method comprises: on the basis of an interactive model computation result in a pre-configured program interface, controlling a one-dimensional system program and a three-dimensional computational fluid mechanics program to perform coupling computation, wherein the program interface is configured between the one-dimensional system program and the three-dimensional computational fluid mechanics program, and the model computation result comprises results obtained by performing simulation computation on a liquid metal reactor by the one-dimensional system program and the three-dimensional computational fluid mechanics program; and obtaining a real-time computation result of coupling computation of the one-dimensional system program and the three-dimensional computational fluid mechanics program, wherein the real-time computation result comprises a simulation result of a thermal stratification phenomenon of the liquid metal reactor in a transient operation process. The present application can reduce the computing resource demand and the time cost and improve the efficiency while ensuring that the thermal stratification phenomenon of the liquid metal reactor is accurately simulated.

The invention discloses a twisted pressure suppression spray pipe capable of adaptively adjusting the immersion depth, relates to the technical field of reactor thermal hydraulic power, and solves the problems of condensate water hammer and thermal stratification caused by water seal removal, pool swelling and low-speed discharge in the whole operation stage of a pressure suppression system in the prior art. The suppression spray pipe comprises a twisted inner pipe and a circular outer pipe, the twisted inner pipe is arranged at the bottom of the pressure suppression box, one end is communicated with the containment, and the other end penetrates through the water space in the pressure suppression box and is arranged above the liquid level of the water space; the upper end of the circular outer pipe is closed, and the lower end movably sleeves the twisted inner pipe; an air space in the pressure suppression box is communicated with the containment through a vacuum release valve; the twisted inner pipe is a spiral straight pipe. The pressure suppression spray pipe adopts a passive design, the immersion depth of the spray pipe is automatically adjusted by virtue of the spring, the gravity of the outer pipe and the pressure difference between the containment and the pressure suppression box, the pressure suppression spray pipe is simple and reliable, and the problems of condensate water hammer and thermal stratification are solved by virtue of a plurality of through holes formed in the limiting porous ring.

The application belongs to the technical field of heat supply equipment, and provides a regional heat supply mixing tank based on turbulence structure optimization, which comprises a first turbulence component and a second turbulence component arranged in a tank body along a water flow direction; the first turbulence component is located behind a low-temperature water inlet and behind a high-temperature water inlet, and is used for blocking the channel of cold water sticking to the bottom and actively inducing to the middle or upper part of the tank body; the second turbulence component is located in front of a medium-temperature water outlet, and is used for forcibly turning and cutting the mixed fluid about to flow out, so as to realize the thermal deviation homogenization of the mixed fluid. The mixing tank is used for hydraulic decoupling and heat mixing of a primary circuit and a secondary circuit of a heat network, and the internal turbulence structure is additionally arranged and optimized to eliminate the thermal stratification phenomenon in the tank, and then the temperature uniformity of the water outlet is improved.

The invention discloses a fault diagnosis analysis method and system for a chromatographic instrument, and relates to the technical field of chromatographic instrument fault diagnos.The fault diagnosis analysis method comprises the following steps that a gas thermal field dynamic mapping model is established based on real-time temperature distribution information in a chromatographic instrument detection pool; a temperature gradient distribution diagram in the detection pool is generated through continuous collection of the distributed multi-point temperature sensing unit; on the basis of a temperature gradient distribution diagram output by the gas thermal field dynamic mapping model, controllable micro-amplitude pulsating gas flow is applied to a gas inlet path of the detection pool, and a diffusible gas disturbance area is formed in the detection pool by adjusting the pulsating frequency and amplitude disturbance gas flow state. Through thermal field mapping and gas disturbance regulation and control, temperature and flow field balance of the detection cell is realized, thermal stratification and retention effects are eliminated, and a detection response linear relation is recovered; and the time reference is dynamically corrected through a signal drift self-suppression mechanism, and the complete output of the low-concentration signal is ensured, so that the sensitivity, the stability and the quantitative precision of the chromatograph are improved.

The invention relates to the technical field of massage, in particular to a bionic hand pinching massager pillow which comprises a pillow and a massage pillow body composed of bionic massage heads rotationally arranged on the pillow, a driving shaft is fixed to one side of each bionic massage head, and a functional mechanism used in cooperation with the bionic massage heads is arranged in the pillow; the functional mechanism is composed of a liquid storage tank, a heating assembly, a transmission structure and a conveying assembly, and the liquid storage tank is located above the heating assembly; the heating assembly comprises a rotating disc, and a plurality of annularly-distributed mounting grooves are formed in the rotating disc. The eddy current and Joule effect are utilized to heat the heat conduction block, non-contact heating is achieved, direct heating of an electric heating wire or open fire is avoided, the fire risk is reduced, meanwhile, heat energy transfer loss is reduced, the transmission sleeve is matched to drive the stirring shaft to rotate, liquid thermal stratification is broken, it is ensured that the temperature in the liquid storage tank is uniform, and local overheating or cooling is avoided; the heating consistency and safety are improved, and the heating efficiency is improved.

This invention discloses a device and method for eliminating thermal stratification in a pooled reactor based on compressed gas. The device includes an independent heat exchanger, a steam generator, a reactor core, a core shielding layer, a main pump, and a temperature sensor array, all housed within the pooled reactor vessel. In this invention, through a linkage mechanism between temperature monitoring and the compressed gas-driven main pump, the weak natural circulation is converted into forced convection circulation during a complete power outage and when thermal stratification occurs. This significantly enhances the disturbance and mixing of hot and cold liquid metals within the pool, effectively eliminating temperature gradients that lead to equipment thermal fatigue and improving the safety of the reactor structure under accident conditions. Unlike simple energy storage and release, by incorporating a preheater, the residual heat from the reactor core is used to reheat and pressurize the compressed gas. This not only recovers some waste heat but also enhances the work capacity of the gas-driven turbine, achieving energy recovery and ensuring the power redundancy required to drive the main pump.

Provided is an apparatus for removing thermal stratification generated by turbulent penetration by using a rotation of a pipe wall. The apparatus removes thermal stratification formed in a branch pipe branching from a main pipe through which a high-temperature fluid flows, the apparatus including: a connection body portion including a hollow first body and a hollow second body, the first body being coupled to one side of the branch pipe, and the second body being spaced apart from the first body and connected to other side of the branch pipe; and a hollow rotating part between the first body and the second body, the rotating part rotating around a center of the branch pipe.

The present invention discloses a method for predicting the dynamic air-conditioning load in a non-enclosed tall space based on thermal stratification. The method includes first defining the initial values of environmental analysis parameters; then obtaining the air flow deflection degree in the air-conditioning area according to the interlayer temperature distribution in the central block and the air-conditioning area; next, based on the inner wall surface temperature and the air flow deflection degree in the central space at the current moment, obtaining the interlayer temperature distribution in the central block and the air-conditioning area at the next moment; obtaining the inner wall surface temperature in the central space at the next moment based on the total heat balance equation and the interlayer temperature distribution in the central block and the air-conditioning area; and finally obtaining the air-conditioning load in the air-conditioning area based on the interlayer temperature distribution. The present invention is used to predict the convective heat transfer dynamic load from the non-enclosed tall space around to the surrounding air-conditioning areas, realizes the dynamic calculation of air temperature and wall surface temperature, and finally obtains the prediction result of the convective heat transfer dynamic load from the non-enclosed tall space around to the surrounding air-conditioning areas through the convective flow rate and air temperature.

The invention discloses a mold heating furnace capable of preventing heat loss, and relates to the technical field of mold heating. Comprising a heating machine body, blowing openings are symmetrically formed in the two sides of the heating machine body, exhaust openings are formed in grooves in the side walls of the heating machine body, a storage table is slidably installed in the heating machine body, a rotating motor is fixedly installed in the storage table, and circulating pipelines are arranged on the two sides of the storage table at equal intervals; and the output end of the rotating motor is connected with a rotating rod. The overall sealing performance of the heating machine body is guaranteed through the sealing plates arranged on the two sides, heat loss is prevented, meanwhile, the sealing plates are periodically opened and closed through the arranged pushing mechanism, condensed gas accumulated inside is exhausted, the temperature difference between the upper portion and the lower portion of the mold is prevented from being too large, the mold moves up and down in the rotating process through the additionally-arranged moving mechanism, and therefore the mold is more uniform. And thermal stratification on the surface of the mold is destroyed, so that the whole mold is heated more uniformly.

Gas Injection Device for Suppression of Thermal Stratification.

The invention discloses a test device for researching dynamic migration of aerosol. The test device comprises an experiment device body, and a smoke generator, heat source equipment, a PIV test control device, a simulation adjusting mechanism and an adjusting spraying mechanism are arranged in the experiment device body; according to the test device for researching the dynamic migration of the aerosol, the smoke generator, the heat source equipment, the PIV test control device, the adjusting injection mechanism and the simulation adjusting mechanism are integrated in the test device body; the whole process of aerosol generation, temperature field simulation, flow field visualization measurement and dynamic movement and posture adjustment is integrated, the smoke generator stably outputs tracing smoke or biological aerosol, the heat source equipment accurately controls the indoor thermal stratification environment, the PIV test control device obtains a high-resolution velocity vector field and a vortex structure in real time, and the measurement precision is improved. The angle and the direction of an injection head can be flexibly adjusted by adjusting a multi-stage electric push rod system of the injection mechanism.

The invention discloses a layered water body deepwater aeration and gas circulation synergistic interaction system and method, and relates to the technical field of water environment in-situ ecological restoration. The system is based on a coaxial sleeve structure, an outer-layer flow channel drives a deep-layer water body to lift by utilizing an airlift effect generated by compressed air, and an inner-layer flow channel is used for reinjecting an oxygen-enriched water body to a deep water layer. An inverted bell-jar-shaped gas-liquid separation cabin is arranged at the top of the device, bubble separation is achieved by means of flow velocity attenuation and the Stokes sedimentation principle, and a gas cavity with pressure potential energy is formed through accumulation. A spiral guide vane is arranged at an inlet of the inner pipe, downward water flow is converted into strong rotational flow, a Rankine vortex negative pressure area is constructed, and gas accumulated on the top is passively sucked into a downward flow channel through the pressure difference between a gas cavity and a vortex core. Through gradient utilization of fluid energy and active fine control of a flow state, the oxygen mass transfer efficiency is remarkably improved without additional energy consumption, a natural thermal stratification structure of a water body is strictly maintained, and resuspension of bottom mud is prevented.

The invention discloses a heat storage equipment system applied to photo-thermal energy storage and a control method of the heat storage equipment system, and relates to the technical field of photo-thermal energy storage. Comprising the steps that S1, temperature data, detected by a temperature sensor array, of different heights in the fused salt heat storage tank and external environment data obtained by an external environment monitoring module are collected in real time, and the external environment data comprise illumination intensity, power grid loads and the real-time price of the electricity market; temperature data of different heights of a fused salt heat storage tank are collected in real time through a temperature sensor array, illumination intensity, power grid load and real-time price data of an electric power market are obtained in combination with an external environment monitoring module, and the data are input into a reinforcement learning central control unit after being preprocessed through filtering, denoising and the like; the unit outputs an optimal control action based on a trained model, a flow control valve is driven to accurately adjust the molten salt charging and discharging speed, a flow field in the tank is optimized through a flow guide structure, and unsteady fluctuation of a thermal stratification temperature gradient layer is effectively restrained.

To reduce sloshing of liquid inside a pressurized container and prevent destruction of thermal stratification.SOLUTION: A pressurized container is provided, comprising a container body for storing a liquid with a gas phase in contact with a top surface of a liquid phase, and a suppression member provided in the container body at a position above a thermal stratification interface, or an interface between a first temperature layer of the liquid phase and a second temperature layer of the liquid phase formed at a temperature lower than that of the first temperature layer and at a position below the first temperature layer, to prevent sloshing of the liquid.SELECTED DRAWING: Figure 1

The invention discloses a fusion device intermittent heat source heat storage tank thermal performance test system and method, and belongs to the technical field of fusion device energy storage system core equipment performance detection.The fusion device intermittent heat source heat storage tank thermal performance test system comprises a heat storage tank operation system, an auxiliary heating system and a test control system; the internal temperature distribution, the outlet temperature change and the thermal stratification characteristics of the high-temperature heat storage tank and the low-temperature heat storage tank in the heat storage and heat release stages are tested in a high-precision mode. According to the testing method, a double-tank circulation process is adopted, precise reproduction of the heat charging / discharging process is achieved in combination with automatic control, and waste heat utilization is supported so as to improve energy efficiency. The technical blank of thermal performance testing of the heat storage tank under the fusion intermittent heat source is filled, and an experimental basis can be provided for design and operation strategy optimization of the efficient heat storage tank.

The invention relates to the technical field of battery thermal management, in particular to a battery immersion cooling device which comprises a battery box body and a flow guide plate, and a plurality of battery modules are distributed in the battery box body; the flow guide plate is arranged in the battery box body and is used for longitudinally dividing the battery module into at least two layers of cooling flow channels which are communicated with each other, electrodes of the battery module are positioned in the uppermost cooling flow channel, and a guide plate for forming a targeted micro-flow channel is arranged in the uppermost cooling flow channel; on one hand, through the U-shaped targeting micro-channel formed by the guide plate, cooling liquid can be gathered and accelerated, a battery module electrode can be accurately scoured, and targeted efficient heat dissipation of the electrode is achieved; on the other hand, the staggered communication grooves are used for guiding the cooling liquid to flow in the upper and lower runners in a broken line manner, and are matched with the wave-shaped spoiler at the lowest layer to form disturbance, so that the phenomena of low-flow areas of the runners and thermal stratification of the cooling liquid are thoroughly eliminated, and the upper and lower layers of the battery module can be uniformly cooled.

The invention discloses a tail water taking elevation identification method. The method comprises the following steps: obtaining dam front water level data, reservoir vertical water temperature distribution observation data and tail water temperature data; cleaning the water temperature distribution observation data, and removing observation points higher than the water level in front of the dam and invalid data; dividing the cleaned water temperature distribution observation data into a plurality of layers; respectively solving elevation fitting functions of the multiple layers and sections, and splicing the elevation fitting functions to form an elevation high-precision fitting function of the continuous temperature; according to the elevation high-precision fitting function, constructing an inversion objective function, and calculating the water taking elevation of the tail water under the dam; according to the method, the thermal stratification structure is distinguished, the continuous high-precision temperature elevation function is constructed, the error objective function is constructed in combination with the temperature of the tail water, then the water taking elevation is inverted through the numerical optimization method, nonlinear characteristics such as a thermal spring layer are effectively captured, and the accuracy of water taking elevation inversion is remarkably improved.

The present application relates to the technical field of low-temperature hydrogen storage, and particularly relates to a liquid hydrogen storage tank thermal stratification suppression system and method, at least comprising: a liquid hydrogen storage tank main body; a bionic fractal flow channel network arranged in the liquid hydrogen storage tank main body, which is in a tree root-like fractal structure and comprises a main stem flow channel and at least two levels of branch flow channels; a plurality of root tip heating units respectively arranged at the end of each terminal branch flow channel and used for locally heating liquid hydrogen; a temperature sensor array distributedly arranged along the height direction of the liquid hydrogen storage tank main body and used for collecting liquid hydrogen temperature data in real time; and a control unit connected with the temperature sensor array and the root tip heating units respectively and used for controlling heating parameters according to temperature differences. The present application can suppress the thermal stratification phenomenon of the liquid hydrogen storage tank in a motionless component-free and self-adaptive adjustment manner.

The present invention provides a thermal stratification mitigation device and a temperature regulation method, which relate to the technical field of liquid temperature regulation. The thermal stratification mitigation device includes a liquid holding pool, an air supply component, a first heating component and a temperature measuring component, wherein the liquid holding pool is used to hold liquid; the air supply component includes an air supply pipe, and the air outlet end of the air supply pipe extends into the lower area of ​​the liquid holding pool; the first heating component is provided in the liquid holding pool, and the number is at least two and arranged in the up and down direction, and is used to heat the liquid in the corresponding height area in the liquid holding pool; the temperature measuring component is provided in the liquid holding pool, and the temperature measuring component includes at least two liquid thermometers arranged at intervals in the up and down direction, and the liquid thermometer is used to detect the liquid temperature in the corresponding height area in the liquid holding pool. The temperature regulation method is applied to the above-mentioned thermal stratification mitigation device. The thermal stratification mitigation device can quickly and effectively alleviate the thermal stratification phenomenon of the liquid, thereby reducing damage to the liquid holding pool and extending its service life.

The application discloses a kind of intermittent heat source heat storage tank thermal performance test system and method of fusion device, belong to the technical field of performance detection of fusion device energy storage system core equipment, including heat storage tank operation system, auxiliary heating system and test control system, by simulating fusion reactor pulse intermittent heat source working condition, respectively to high-temperature heat storage tank and low-temperature heat storage tank in heat storage and heat release stage the internal temperature distribution, outlet temperature change and thermal stratification characteristics are tested with high precision.Test method uses double-tank circulation process, combined with automatic control to realize the accurate reproduction of charge / heat release process, and supports waste heat utilization to improve energy efficiency.The application fills the technical gap of heat storage tank thermal performance test under fusion intermittent heat source, and can provide experimental basis for efficient heat storage tank design and operation strategy optimization.

The invention discloses a method for enriching and detecting lake and reservoir planktonic viruses based on an environmental DNA technology and application of the method, and belongs to the technical field of microorganism detection.The method comprises the steps that 1, according to the change rate of dissolved oxygen on the vertical section of a lake and reservoir water body, the water body is divided into a lake upper layer, an oxygen spring layer and a lake lower layer; 2, when the water depth is smaller than 3 m and thermal stratification and oxygen stratification do not exist, collecting a water sample at the position 0.5 m away from the surface layer, when the water depth is 3-10 m, collecting the water sample at the position 0.5 m away from the surface layer and the water sample at the position 1-2 m away from the upper portion of bottom sediment, and when the water depth is larger than 10 m, at least collecting samples of three water layers; according to the method, by combining two different sample treatment methods, lake and reservoir planktonic virus communities including intracellular viruses and virions can be more comprehensively detected, so that more complete information is obtained. By knowing the structure and function of the lake and reservoir planktonic virus community, a scientific basis is provided for water environment monitoring and management, water body pollution can be prevented and controlled, and the water ecological environment is protected.

The invention discloses a chilled water storage central air conditioner energy-saving management system, and particularly relates to the technical field of cold and heat source energy-saving operation control, and the chilled water storage central air conditioner energy-saving management system comprises a thermal stratification modeling module, a stability early warning module, a flexible pump control module, a path scheduling module and a cooling capacity repairing module. Establishing a three-dimensional thermal stratification model in real time to evaluate stratification integrity and calculate effective cold energy reserves; when disturbance occurs, early warning is triggered, and operation parameters are adjusted; the pump speed is adjusted according to the system load, and a pump set health model is constructed; the optimal refrigeration path is scheduled according to thermal stratification and the pump set state; after mixing, the cold and hot water gradient is repaired through pump control; by constructing the three-dimensional thermal stratification digital model, accurate evaluation of the cold and hot stratification state and the cold energy reserve of the water pool is achieved, disturbance early warning and a pump control adjusting mechanism are combined, the self-adaption and safe operation capacity of the system is improved, optimal resource allocation and stratification gradient recovery are achieved through path scheduling and cold energy restoration, and the system reliability is improved. And the system energy efficiency and stability are integrally improved.

The invention discloses a nuclear power pipeline thermal cycle and thermal stratification fluctuation risk assessment method and device. The method comprises the steps of obtaining pipeline size parameters and operation condition parameters; establishing a finite element model based on the pipeline size parameters, and setting calculation conditions and boundary conditions based on the operation condition parameters; based on the finite element model, the calculation condition and the boundary condition, obtaining a cold and hot fluid mixing interface position and a temperature evolution state; determining the risk degree based on the position of the cold and hot fluid mixing interface and the temperature evolution state, and judging whether a mitigation measure needs to be designed or not; if so, designing a mitigation measure based on the risk degree; the degree of risk is re-determined based on the designed mitigation measures. According to the method, through accurate numerical simulation and a dynamic risk assessment mechanism, comprehensive identification and quantitative analysis of thermal cycle and thermal stratification fluctuation risks in a complex pipeline system are realized.