40results about "Heat exchange simulation" patented technology

The invention discloses a calcium-based thermochemical particle bed health status assessment method and a related device. The method comprises the following steps: acquiring a surface image of a calcium-based thermochemical particle bed; performing data enhancement on the surface image of the calcium-based thermochemical particle bed layer; inputting the surface image after data enhancement into a multi-task segmentation model to obtain a pixel-level segmentation mask; calculating the expansion rate, the agglomeration index, the crushing degree, the collapse depth and the collapse area ratio of the particle bed layer according to the pixel-level segmentation mask; the performance of the calcium-based thermochemical particle bed layer is evaluated according to the expansion rate, the agglomeration index, the crushing degree, the collapse depth and the collapse area ratio of the calcium-based thermochemical particle bed layer. The method and the related device can accurately detect the health of the calcium-based thermochemical particle bed layer.

To provide a method for conforming quality of a heat exchanger that does not require the use of a large amount of hot air.SOLUTION: A method for confirming quality of a heat exchanger comprises: a step ST11 of performing a hydraulic pressure test in which liquid is sealed in a pressurized state into a first flow path and a second flow path of the heat exchanger having the first flow path and the second flow path adjacent to the first flow path; a step ST12 of discharging liquid from the first flow path and the second flow path; and a step ST13 of reducing pressure in the first flow path and the second flow path with a vacuum pump to promote evaporation of the liquid remaining in the first flow path and the second flow path. In the step ST13 of promoting the evaporation of the liquid, heated gas is fed into the first flow path and the second flow path.SELECTED DRAWING: Figure 3

The invention belongs to the field of thermal power generating unit cold end optimization, particularly relates to an air cooling island finned tube temperature field prediction method based on a physical information neural network, and aims to realize accurate, efficient and robust prediction of an air cooling island finned tube temperature field. The method comprises the steps that operation data are collected and preprocessed based on a direct air cooling unit condenser sensor, and a data set is obtained; according to a heat conduction and fluid flow control equation, a loss function is constructed in combination with initial and boundary conditions, and a physical information neural network containing a forward flow region and reverse flow region full-connection neural network and embedded with physical prior constraints is established; then training the network by using a data set, calculating the required heat exchange area and the actual heat exchange area of the downstream region through a heat balance equation during training, and selecting to start the downstream region network or combine the two-region network according to the sizes of the required heat exchange area and the actual heat exchange area; and finally, deducing the temperature distribution of a single-row air cooling unit by using the trained network, finely adjusting model parameters if the prediction deviation exceeds a threshold value, and expanding to a multi-row structure to obtain the temperature field distribution of the whole finned tube of the air cooling island.

A method can comprise dividing a heat exchanger design into a plurality of modules (10), the plurality of modules (10) arranged in a grid, each module in the plurality of modules (10) including: a first fluid conduit (161) defining an inlet (1611), an outlet (1612), and a heat-transfer surface (602), and a first flow direction, and a second fluid conduit (162) defining a second inlet, a second outlet, a second heat-transfer surface, and a second flow direction, the second flow direction different from the first flow direction; and determining a heat-transfer augmenter arrangement (1161) for the first fluid conduit (161) and the second fluid conduit (162) of each module in the plurality of modules (10) based on a stress threshold of the module (16) in the plurality of modules (10).

A plate heat exchanger is disclosed in which several heat exchanger plates are held together in a pressure frame between a frame head equipped with media connections and a cover by means of a clamping device to form a plate stack. A flow chamber is formed between each adjacent plate by a circumferential seal. The flow chambers are alternately connected to two different pairs of media connections, so that adjacent flow chambers can be supplied with different heat exchange media. To enable monitoring of the seal condition, at least one pressure sensor is arranged on the frame head along a contour line of the circumferential seals, which measures the surface pressure acting on the circumferential seals in the plate stack.

The invention discloses transformer waste heat recovery equipment for a transformer substation, and belongs to the field of transformer waste heat utilization, the transformer waste heat recovery equipment comprises a transformer main body, and the outer side of the transformer main body is provided with a stable waste heat recovery mechanism for recovering heat of the transformer main body; the waste heat stable recovery mechanism comprises a circulating winding pipe connected to the outer side of the transformer body in a winding mode and a heat preservation shell fixedly connected to the outer portion of the transformer body, the two ends of the circulating winding pipe penetrate through the heat preservation shell and jointly communicate with a circulating liquid pipe, and the middle position of the circulating liquid pipe is connected with a medium-temperature phase change heat storage mechanism in a penetrating mode. The heat preservation shell enables the waste heat stable recovery mechanism to be kept stable to the maximum extent during heat recovery, secondly, the medium-temperature phase change heat storage mechanism and the low-temperature phase change heat storage mechanism are arranged, the waste heat recovery efficiency can be achieved to the maximum extent, the heat dissipation efficiency of the transformer body can be guaranteed, and the service life of the transformer body is prolonged. And the condition that the normal work of the transformer main body is influenced by over-high temperature is avoided.

A fluid control device includes a housing having a plurality of surfaces that define a cavity within the housing. The housing includes an inlet to receive a fluid mixture and an outlet to direct the fluid mixture out of the housing. The fluid mixture includes a fluid combined with debris. An array of structures is disposed within the cavity and includes a plurality of structures. Each of the plurality of structures includes a first surface coupled with an inner surface of the housing and a second surface disposed a distance away from the inner surface of the housing. The array of structures includes a first portion and a second portion. The first portion is configured to interfere with the fluid mixture to separate at least some of the debris from the fluid, and the second portion is configured to direct the fluid and at least some of the debris toward the outlet.

Systems and methods are provided for evaluating performance of a heat exchanger, such as a condenser, using rules-based logic. A plurality of sensors can measure various operating properties of the heat exchanger and transmit corresponding measurement information to a controller. The controller can (i) evaluate the measurement information for a plurality of rules in which each rule considers an operating parameter of the heat exchanger that is based on the measurement information to provide a set of operating values; (ii) compare the set of operating values to a rules matrix in which each of a plurality of possible diagnoses for the heat exchanger are associated with a corresponding set of predetermined values from a set of the plurality of rules; and (iii) based on the comparison, determine at least one likely diagnosis for the heat exchanger from among the plurality of possible diagnoses.

Method for operating a heat exchanger in the intake manifold of an internal combustion engine, - wherein the heat exchanger is subjected to a flow of medium during temperature control, which contains components that are deposited on and subsequently removed from a surface of the heat exchanger, resulting in a variable thickness (d S ) a layer of deposited components of the medium to be tempered on a surface of the heat exchanger and consequently the thermal resistance (M) of the heat exchanger changes during operation, so that control and / or regulation of the temperature of the medium to be tempered is affected, - where the medium to be tempered is a mixture of fresh air and exhaust gas, - where the control and / or regulation of the temperature of the medium to be tempered is model-based, - taking into account the change in thermal resistance (M) in model-based temperature control and / or temperature regulation, - where it is assumed that the thermal resistance (M) is composed of a constant component (M0) and a time-dependent component (M1(t)), where the time-dependent component (M1(t)) is further dependent on the variable thickness (d) S ) is dependent and the change in thickness (d S ) is attributed to the mass or quantity flow rate of the medium to be tempered, which flows through the heat exchanger, - wherein the deposition and removal of components of the medium to be tempered on a surface of the heat exchanger is described by a differential equation concerning the variable thickness (d S ) is described, - where a determination of parameters k appearing in the differential equation d , k R, which take into account the application to the surface of the heat exchanger and the removal from the surface of the heat exchanger during the operation of the heat exchanger.

This invention provides a gasket-type electromagnetic flow sensor and a heat exchanger. The gasket-type electromagnetic flow sensor includes a gasket body and multiple sensing units. The gasket body includes an insulating region with multiple tube holes, which are connected to multiple heat exchange tubes of a tube bundle. Multiple sensing units are respectively disposed within the gasket body and distributed within the insulating region, each corresponding to one of the tube holes. Each sensing unit includes a magnetic field generator and an electrode assembly. The magnetic field generator generates a magnetic field within the tube holes to polarize the liquid medium passing through them. The electrode assembly outputs an induced electromotive force signal based on the polarized liquid medium. This invention can monitor the flow state of the medium within each heat exchange tube of a tube bundle online, quickly locating leaking heat exchange tubes. This not only facilitates accurate monitoring and description of the flow and heat exchange state of the heat exchanger but also provides guidance for operations such as tube plugging when tube-side leaks occur.

The invention discloses a condenser scaling prediction method, product, medium and system, and the method comprises the following steps: S1, obtaining the operation parameters of a condenser, including the circulating water inlet temperature, the circulating water outlet temperature, the steam turbine exhaust steam temperature, the cooling water mass flow and the condenser heat exchange area; s2, calculating a total heat transfer coefficient of the condenser based on the condenser operation parameters, and further obtaining a scaling coefficient; wherein the scaling coefficient is used for representing the cleanliness of the cooling water pipe, and the value of the scaling coefficient is increased along with the increase of the scaling degree; and S3, outputting the scaling coefficient as time sequence data to a pre-constructed gray prediction model for processing, outputting a scaling coefficient prediction value of a future time period, and judging the scaling trend of the condenser according to the scaling coefficient prediction value. According to the method, the condenser variable working condition physical model and the grey prediction algorithm are fused, and dynamic and quantitative evaluation and trend prediction can be carried out on the condenser scaling state only through a small amount of operation data.

A method can comprise dividing a heat exchanger design into a plurality of modules (10), the plurality of modules (10) arranged in a grid, each module in the plurality of modules (10) including: a first fluid conduit (161) defining an inlet (1611), an outlet (1612), and a heat-transfer surface (602), and a first flow direction, and a second fluid conduit (162) defining a second inlet, a second outlet, a second heat-transfer surface, and a second flow direction, the second flow direction different from the first flow direction; and determining a heat-transfer augmenter arrangement (1161) for the first fluid conduit (161) and the second fluid conduit (162) of each module in the plurality of modules (10) based on a stress threshold of the module (16) in the plurality of modules (10).

A method can comprise dividing a heat exchanger design into a plurality of modules (10), the plurality of modules (10) arranged in a grid, each module in the plurality of modules (10) including: a first fluid conduit (161) defining an inlet (1611), an outlet (1612), and a heat-transfer surface (602), and a first flow direction, and a second fluid conduit (162) defining a second inlet, a second outlet, a second heat-transfer surface, and a second flow direction, the second flow direction different from the first flow direction; and determining a heat-transfer augmenter arrangement (1161) for the first fluid conduit (161) and the second fluid conduit (162) of each module in the plurality of modules (10) based on a stress threshold of the module (16) in the plurality of modules (10).

The invention relates to the field of waste heat utilization, in particular to a process cooling water waste heat recovery equipment performance evaluation method which comprises the following steps: S1, constructing an equipment stability model based on equipment stability influence parameters, and outputting a corresponding equipment stability coefficient; s2, constructing an operation state model based on the total electric power of the equipment and the energy efficiency of the equipment, and outputting an operation state coefficient; and S3, constructing a performance evaluation coefficient of the equipment in combination with an equipment stability coefficient and an operation state coefficient based on the equipment use duration and the workshop personnel density under the corresponding working condition parameters in the equipment stability model and the operation state model as influence factors. According to the invention, a more comprehensive and dynamic performance evaluation system is constructed to judge the real performance of the waste heat recovery equipment.

This invention discloses an online fault diagnosis method for graphite heat exchangers, relating to the field of data processing technology. The method includes: performing data acquisition to establish a time-series monitoring dataset; dividing the time-series monitoring dataset into stages, creating a uniform sampling space; constructing a fitting dataset with constraints of minimum sample size and sampling space, and performing interior and exterior point discrimination; iteratively constructing the fitting dataset and obtaining a working fitting curve; establishing a calibration fitting curve, and establishing a basic deviation evaluation value based on the deviation evaluation between the calibration fitting curve and the working fitting curve; performing exterior point discrete analysis to establish additional deviation evaluation values; setting key coefficients for monitoring parameters in fault anomalies, calculating fault values, and performing fault early warning. This method solves the technical problem of difficulty in timely and accurate diagnosis of graphite heat exchanger faults in existing technologies, achieving online fault diagnosis of graphite heat exchangers and improving the accuracy and efficiency of fault diagnosis.

Shell-and-tube devices typically require regular maintenance. Described herein is an automated method for tracking the status of individual tubes during maintenance activities and recording status data for review and analysis. Status data may optionally be reported in real-time summary format and / or used to predict time-to-completion. The method helps to reduce the expense of performing maintenance activities in shell-and-tube devices, including shell-and-tube reactors and heat exchangers.

A method for maintaining performance of a cooling tower includes obtaining cooling tower specification information including performance curves indicating a cooling performance of the cooling tower and generating a performance model. The method includes collecting real-time sensor data from the cooling tower, the real-time sensor data including an average inlet water temperature into a condenser and an average outlet water temperature out of the condenser. The method includes calculating a flow rate through the condenser and calculating an expected cold water temperature using the performance model based on (i) a difference between the average outlet water temperature and the average inlet water temperature, (ii) a wet bulb temperature, and (iii) the flow rate. The method includes comparing the expected cold water temperature to the average inlet water temperature to determine a cold water temperature difference, and determining whether the cooling tower requires maintenance based on a calculated production penalty.

The present invention relates to a hydrogen embrittlement testing apparatus having a heat exchanger, the apparatus being for testing stress corrosion cracking of a specimen according to hydrogen embrittlement. The hydrogen embrittlement testing apparatus having a heat exchanger, according to an embodiment of the present invention, comprises: a test chamber having, therein, a test space to which hydrogen is supplied; a fixing jig to which a specimen brought into the test chamber is fixed; a tension rod for tensioning the specimen fixed to the fixing jig; and a heat exchanger, which is provided in the test chamber and allows heat exchange between hydrogen and a heating medium, so that hydrogen and a heating medium, that are supplied into the test chamber, undergo heat exchange such that the temperature of the hydrogen is adjusted. Therefore, hydrogen rapidly undergoes heat exchange such that heat exchange performance can be improved.

Fouling is formation of deposits on the heat exchanger surfaces that adversely affects operation of heat exchanger. Fouling can be approximated through a set of estimated heat exchanger parameters, which may not be accurate, leading to uncertainty in operation / maintenance decisions and hence the losses. A system and a method for identification and forecasting fouling of a plurality of heat exchangers in a refinery has been provided. The system comprises a digital replica of the heat exchanger network. The digital replica is configured to receive real-time sensor data from a plurality of data sources and provides real-time soft sensing of key parameters. The system is also configured to diagnose the reasons behind a specific condition of fouling. Further, an advisory is provided, that alerts and recommends corrective actions. The system provides estimate for the remaining useful life (RUL) of the heat exchangers and suggests the cleaning schedule.

A plate heat exchanger includes a heat-transfer plate stack including a plurality of heat-transfer plates in which first fluid and second fluid exchange heat each other, a first cover allowing the first and second fluids to flow therethrough, and a second cover having a cover hole defined therein. Each heat-transfer plate has a dead zone, and at least one dead zone hole is defined in the dead zone. Inspection gas may be injected into the cover hole, and the injected gas may be introduced into the dead zone through the dead zone hole to conduct fluid-tightness inspection of the dead zone. Accordingly, a brazing defect is detected before product shipment, and thus, freezing and breakage of the plate heat exchanger is prevented.

A system may include a shell and tube heat exchanger with temperature sensors affixed to an outer surface of shell and tube inlet and outlet ports, flow rate sensors affixed to an outer surface of shell and tube inlet ports, and pressure sensors within Tees connected to the shell and tube inlet and outlet ports. Wireless transmitters may transmit sensor data from the sensors to a computing device. The computing device may determine one or more fouling indicators, based on the sensor data, indicating a likelihood of fouling occurring in the shell and tube heat exchanger.

The invention discloses a unified flexible quantification method, device and equipment for cooling, heating and power energy storage equipment and a medium. The method comprises the following steps: constructing an equivalent energy storage model which comprises an electrochemical energy storage model based on equivalent resistance and a phase change energy storage model based on equivalent thermal resistance and is used for representing a mapping relation between a control parameter and adjustable electric power; on the basis of obtaining the running state of the energy storage equipment and the boundary of the control parameters, determining the maximum feasible value of the control parameters in the current state, and calculating the corresponding maximum adjustable electric power based on the equivalent energy storage model, namely the power capacity of the energy storage equipment; and after the maximum adjustable electric power of the energy storage equipment is determined, the sustainable time and the energy capacity of the energy storage equipment under the set adjustable electric power are calculated in combination with the adjustment interval of the control parameters. The method can accurately quantify the flexibility of the cooling and heating power energy storage equipment, and supports the cooling and heating power energy storage equipment to efficiently participate in operation regulation and control of a power system.

The invention relates to a computer-implemented method for determining a manufacturable cooling structure for cooling a semiconductor device wherein the method receives as input at least i) physical parameters of the semiconductor device, wherein the physical parameters are related to physical properties of the semiconductor device, and ii) an array of numbers (1) indicative of a spatial power distribution of the semiconductor device, wherein the method comprises the following steps: 1) determining, using an topology optimization algorithm, a cooling structure based on the received input, and 2) providing, as output, a filetype containing the determined cooling structure in a data format based on which the determined cooling structure can be physically manufactured, wherein the filetype containing the determined cooling structure is a vector-based filetype). There is further provided a semiconductor device formed using the method of the invention and a corresponding electronic design automation tool.

A method for checking quality of a heat exchanger includes the steps of: performing a liquid pressure test for the heat exchanger including a first flow path and a second flow path adjacent to the first flow path by filling the first flow path and the second flow path with a liquid in a pressurized state; discharging the liquid from the first flow path and the second flow path; and promoting evaporation of the liquid remaining in the first flow path and the second flow path by reducing pressure inside each of the first flow path and the second flow path using a vacuum pump. The step of promoting evaporation of the liquid is performed to feed heated gas into the first flow path and the second flow path.

A heat exchanger includes a body formed of a refractory metal alloy. The body defines one or more fluid passageways therein. A sensor is embedded in an inner surface of the one or more fluid passageways. A method of forming a heat exchanger includes additively manufacturing a shapeholder with elongated bodies that correspond to fluid passageways to be defined within a body. The method also includes additively manufacturing one or more sensors on the elongated bodies of the shapeholder. A material of the body is formed and sintered around the elongated bodies of the shapeholder and the one or more sensors. The shapeholder is removed from the body, leaving the one or more sensors embedded at an inner surface of the fluid passageways.

In one aspect, a heat exchanger system is provided, comprising a cooling system and a sensor configured to detect a variable of the cooling system. The heat exchanger system includes a processor circuit configured to provide the cooling system variables and a plurality of potential operating parameters to a representative machine learning model of the cooling system to estimate at least one of energy consumption, water usage, and chemical usage for the potential operating parameters. The processor circuit is further configured to determine optimal operating parameters of the cooling system that satisfy a target optimization metric based, at least in part, on at least one of energy consumption, water usage, and chemical usage estimated for the potential operating parameters.

The system may include a shell-and-tube heat exchanger, which has temperature sensors mounted on the outer surfaces of the shell inlet and outlet ports and the tube inlet and outlet ports, flow sensors mounted on the outer surfaces of the shell inlet and tube inlet ports, and pressure sensors in T-fittings connected to the shell inlet and outlet ports and the tube inlet and outlet ports. A wireless transmitter can transmit sensor data from the sensors to a computing device. Based on the sensor data, the computing device can determine one or more fouling indicators that indicate the possibility of fouling occurring in the shell-and-tube heat exchanger.

A cooling plate assembly includes: a wall surrounding an effective volume adjacent to an inlet air chamber; the wall includes an inlet opening at one end on the top side of the inlet air chamber and an air chamber opening between the inlet air chamber and the effective volume. It also includes a baffle that partially separates the inlet air chamber from the effective volume. The baffle is structurally configured to preferentially redirect flow from the inlet air chamber to the effective volume.

The application relates to a flow-induced vibration test device, a method, a computer device, a storage medium and a product. The device comprises a flow channel groove, a test simulation body and a collection device. The flow channel groove comprises a fluid inlet section, a fluid mixing section, a test section and a fluid outlet section which are sequentially connected. The fluid mixing section is used for mixing the fluid flowing from the fluid inlet section to generate mixed fluid. The mixed fluid flows through the test section and flows out from the fluid outlet section. The test simulation body comprises a plurality of non-linear heat transfer pipes and a support assembly. The support assembly is used for fixedly mounting the plurality of non-linear heat transfer pipes in the test section. The collection device is arranged on the plurality of non-linear heat transfer pipes and is used for collecting test data when the plurality of non-linear heat transfer pipes flow-induced vibration occurs when the mixed fluid flows into the test section. The flow-induced vibration test device can ensure that the large natural circulation heat exchanger can safely operate in actual production by cooperating the plurality of non-linear heat transfer pipes with the support assembly.