5 results about "Joule effect" patented technology

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.

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.

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.