12 results about "Joule effect" patented technology

The invention discloses a heating system and a heating method for simulating a water loss accident, and belongs to the technical field of nuclear fuel circulation and irradiation effect research, the heating system comprises a fuel rod, the fuel rod comprises a fuel cladding and a fuel core body, the fuel rod is arranged in a quartz tube sample cavity, the whole fuel rod is arranged in a reaction furnace body, and an infrared temperature detector monitors the temperature in real time through a peep window; and data is fed back to the processing box to dynamically adjust power output. The fuel rod is used as a resistance material, low-voltage alternating current is applied, self-heating is achieved through the Joule effect, heat transfer lag of a traditional heating mode is eliminated, the infrared temperature detector monitors the temperature in a non-contact mode through the squint window and feeds back the temperature to the processing box in real time to dynamically adjust power output, and closed-loop control is formed. And the ultrafast temperature rise requirement under the water loss accident working condition is accurately simulated.

The invention relates to a system for determining (100) the quantity of carbon dioxide emissions resulting from the heating of an electrical conductor in an electrical cable by Joule effect, said system comprising: - an electrical cable (10) comprising at least one electrical conductor (12) and at least one layer of material surrounding said at least one conductor, - a measuring unit (110) associated with the electrical cable, said measuring unit comprising at least one temperature sensor (20) and a device for measuring the electrical intensity Icond (112) of an electric current flowing in the electrical conductor, - a computing unit (120) configured to communicate information with the measuring unit, the computing unit being configured to determine the conductor temperature Θcond by means of said at least one temperature sensor,said calculation unit being further configured to determine the quantity of carbon dioxide emissions resulting from the heating of the electrical conductor by Joule effect as a function of the conductor temperature Θcond and the electrical current Icond in the electrical conductor. Figure for the abbreviation: Figure 1,

This invention relates to the field of electrochemical material preparation technology, specifically disclosing an apparatus for large-scale manufacturing of high-performance water electrolysis electrodes using the Joule heating effect. The apparatus includes a frame body, an unwinding roller, a winding roller, and a conductive carrier conveyor belt transporting the materials. A spraying unit, a pre-drying unit, and a Joule heating unit are sequentially arranged along the conveyor belt's movement direction. The Joule heating unit includes a first conductive roller and a second conductive roller electrically connected to the positive and negative terminals of a DC power supply, respectively. When the second conductive roller contacts the moving conductive carrier conveyor belt, current flows through the conveyor belt, generating Joule heat and inducing a thermochemical reaction in the precursor loaded on its surface. This apparatus achieves integrated, streamlined operation from spraying and pre-drying to high-temperature reaction. Simultaneously, the direct, instantaneous, and localized heating method based on the Joule effect significantly reduces heat loss and promotes in-situ reaction and firm bonding of the catalyst precursor on the conductive carrier surface, effectively improving the electrode's catalytic activity and long-term stability.

The application belongs to the field of infrared detector manufacturing, and specifically discloses a kind of ceramic package pulse current activation methods of infrared detector. The method comprises: providing a ceramic package infrared detector assembly, the two ends of the sheet-shaped non-evaporable getter in the assembly are fixed on two first type conductive columns;Electricity contact probe is contacted with the first type conductive column;Preheating current is applied to the getter through the first type conductive column, then high-frequency pulse current is applied to activate, so that the getter body reaches the activation temperature due to Joule effect;During the pulse current activation process or after activation, the detector chip is subjected to low-temperature thermal stabilization treatment. The application realizes the rapid local activation of the getter by pulse current, shortens the process time, reduces the energy consumption, avoids thermal damage, and improves the performance of the detector, and is especially suitable for ceramic packaged infrared detectors.

There is provided a two-melt chemical synthesis steps process for the preparation of a lithium metal phosphate (LiMPO4) cathode material, wherein the metal (M) is iron and / or manganese. The process comprises: a first step of mixing a lithium source and a phosphorus source in a first melt reactive pool at a temperature of about 650°C or more to form liquid LiPO3 (LiPO3(l)); and a second step of contacting the LiPO3(l) with a 'metal-oxygen' source ('M-O' source) to form LiMPO4 in a second melt reactive pool held at a temperature above the melting point of LiMPO4. Metallic iron and / or metallic manganese may be used as sole metal sources and heat from the Joule effect produced may constitute a further heating means for the pool.

A heated subsea pipe and process for transporting fluids, includes a plurality of pipe sections each having a transport tube for receiving the fluids, an electrically insulating inner layer arranged around the transport tube, a sealing tube made of electrically conductive material arranged around the electrically insulating inner layer, a thermally insulating outer layer arranged around the sealing tube. The transport tube is electrically connected to the sealing tube at each of the two ends of the pipe. The pipe includes two electrical cables connected to an electric generator and, to the transport tube and to the sealing tube of the pipe at a point situated between the two ends of the pipe to produce two parallel electrical circuits each traversed by an electric current for heating the transport tube of the pipe by Joule effect.

The application discloses a CT-X ray tube bearing life test device, which comprises a test table and a tool seat, the tool seat is connected with a vacuum quartz glass cover, a test cavity is formed in the vacuum quartz glass cover, the test cavity is provided with a bearing to be tested, a rotor copper sleeve used for cooperating with the bearing to be tested and a target disc used for cooperating with the rotor copper sleeve, the tool seat is provided with a heating structure used for heating the target disc through the Joule effect and a driving structure used for driving the bearing to be tested to rotate through the electromagnetic induction principle to simulate the actual operation condition of the bearing, the test table is provided with a vacuum pumping structure used for pumping out the air in the test cavity to simulate the vacuum environment when the bearing is actually operated, and the tool seat is provided with a detection structure used for monitoring the rotating speed of the bearing and the temperature of the target disc. The application solves the problem that the prior art lacks a special life test device capable of simulating the vacuum, high temperature and electromagnetic driving rotating condition of the actual work of the CT-X ray tube bearing.

This invention provides a Carnot battery system and its operation method with tiered temperature matching for production, storage, and utilization, relating to the field of molten salt energy storage technology. The system includes a charging section, an energy storage section, and an energy dissipation section. The energy storage section includes a tiered heating unit, a tiered thermal storage unit, and a tiered heat utilization unit. The tiered heating unit is composed of a medium-temperature heat pump, a medium-high temperature heat pump, and a Joule-effect electric heater connected in series, realizing the tiered conversion of electrical energy into thermal energy in different temperature zones. The tiered thermal storage unit uses high-temperature and low-temperature molten salt to store thermal energy in stages. The tiered heat utilization unit is thermally coupled with molten salt in different temperature zones, releasing thermal energy in stages according to heat demand. This invention, through tiered temperature matching at the production, storage, and utilization ends, uses Joule electric heating instead of heat pumps in the high-temperature section, significantly improving economy and reliability with minimal efficiency sacrifice. It can also be expanded into a combined cooling, heating, and power (CCHP) system, suitable for scenarios such as new energy consumption and flexible retrofitting of thermal power plants.

The invention discloses a battery module low-temperature self-heating system based on bidirectional pulse current. A battery module is used as a heated object and an energy carrier for realizing self-heating and is provided with a physical positive electrode output end and a physical negative electrode output end; and the switch module is used as a core power switching component, and the power input end and the power output end of the switch module are firmly connected with the positive electrode output end and the negative electrode output end of the battery module through wires or copper bars. The heat production mode is changed, the system enables the interior of the battery to generate high-frequency bidirectional pulse current through the switch module, the current flows through the ohmic internal resistance and the polarization internal resistance of the battery, and chemical energy of the battery is directly converted into heat energy according to the Joule effect (P = I2R); and heat is uniformly generated from each position in the battery, so that the'body heating 'effect is realized, and the problems of conduction loss and non-uniform temperature of external heating are thoroughly avoided, therefore, the heat efficiency is extremely high, the temperature rising speed is high, and the consistency of the battery module can be effectively protected.

This invention relates to the field of ironmaking technology, specifically to a method and apparatus for self-terminating Joule-driven ironmaking and gas co-production, aiming to solve the technical problems of high energy consumption, large carbon emissions, and long reaction cycles in traditional ironmaking processes. This invention uses green electricity as a driving force, utilizing the Joule effect to achieve direct reduction ironmaking from iron ore powder. The reaction self-termination is achieved through a system short circuit triggered by the formation of the metallic phase, simultaneously completing the efficient co-recovery of gas. The process employs a carbon-based conductive reducing agent for direct heating, eliminating heat transfer losses and increasing the reaction rate. The green electricity supply aligns with the requirements of dual-carbon development, the product has high purity of metallic iron particles, and the gas recovery value is significant. The apparatus achieves continuous operation and has a compact structure, providing a new technical path for the green and low-carbon transformation of the ironmaking industry.

The application provides a resistance self-heating type solid-state hydrogen storage reactor, and belongs to the technical field of hydrogen energy storage, comprising a solid-state hydrogen storage component, a heat management component and an electric heating component. The porous solid-state hydrogen storage material is a coal ash doped magnesium-based composite material, has a porous structure and intrinsic conductivity, and realizes rapid and uniform self-heating through Joule effect; heat exchange plates and hydrogen storage materials are alternately distributed, a closed loop heat management is formed by driving a heat exchange medium and a phase change material storage tank by a circulating pump, heat release recovery in the hydrogen storage stage and heat supply in the hydrogen release stage are realized; an electric heating unit supplements Joule heat through an external power supply, and a temperature control module is combined to realize real-time control of the operating state. The application solves the problems of traditional solid-state hydrogen storage, such as heat response lag, uneven temperature and high energy consumption, significantly improves the hydrogen storage / release rate, cycle stability and energy utilization efficiency, and is suitable for large-scale long-period hydrogen storage of renewable energy.

The application provides a method and device for grading gasification and reforming recovery of retired fan blades, and belongs to the technical field of solid waste decomposition and recovery. The method comprises the following steps: heating retired fan blade particles to 700-900 DEG C in an inert atmosphere, introducing water vapor for pyrolysis to obtain pyrolysis gas; introducing the pyrolysis gas into a porous medium loaded with an active metal catalyst to perform periodic pulse joule heating, and the average temperature in the process is 900-1200 DEG C to obtain hydrogen-rich synthesis gas; and cooling and recovering glass fibers in an inert atmosphere after pyrolysis. Heating in an inert atmosphere can prevent oxidation reaction and protect the structure of glass fibers; the introduction of water vapor can realize complete decomposition of the resin matrix, and the glass fibers obtained have high surface cleanliness and high tensile strength retention rate; then, the joule effect is used to realize rapid multi-stage high temperature, and the first-stage pyrolysis product is directionally converted into hydrogen-rich synthesis gas. The problems of high recovery cost and large environmental risk of the existing retired fan blades are solved.