8 results about "Helium temperature" patented technology

The application discloses a kind of salt cavern helium storage wellbore-cavity-surrounding rock temperature field prediction method.Real-time monitoring salt cavern helium storage operation dynamics, including but not limited to wellhead pressure and injection-production rate and other data, based on the collected helium injection-production operation data, combined with the basic parameters of wellbore composite structure, the numerical calculation of helium flow and heat transfer equation is carried out;Again based on the prediction result of helium temperature field in wellbore, the convection law of helium in cavity is solved, and then the coupling heat transfer between cavity and surrounding rock is calculated, to realize the accurate prediction of wellbore-cavity-surrounding rock temperature field finally.

A circulating refrigeration system without liquid helium consumption. The system comprises: a liquid-helium-free refrigerating machine (40); a copper shielding tube (10), one end of the copper shielding tube (10) being connected to a shielding cylinder (5) of the liquid-helium-free refrigerating machine (40), and a first-stage cold head connector (11) and a second-stage cold head connector (13) being provided at the other end of the copper shielding tube (10); a first-stage cold shield, which is connected to the first-stage cold head connector (11) by means of a copper braid and is arranged on the outer ring of a μ metal cover; the μ metal cover, which is connected to the first-stage cold head connector (11) by means of the copper braid and is connected to the first-stage cold shield by means of a first-stage cold shield copper braid, wherein the μ metal cover, as a fixing ring, is in vacuum connection with a lower pole piece of an electron microscope, and the μ metal cover is connected to a Z-axis piezoelectric ceramic holder in a sample chamber (8) by means of a thermally insulating gasket; and a sample stage fixing member (28), which is connected to the second-stage cold head connector (13) by means of the copper braid. The present application can achieve a required liquid-helium temperature range environment for a long time, thereby greatly reducing the experiment cost, reducing mechanical vibrations, improving the transverse resolution, and thus realizing an ultrahigh resolution of an electron microscope.

The application discloses a high-temperature gas cooled reactor nuclear power plant high-pressure heater disassembly transient compensation system and a working method thereof, and belongs to the technical field of nuclear power. When the unit is normally operated, part of steam is extracted from main steam to heat low-temperature molten salt, and heat is transferred to high-temperature molten salt and stored in a high-temperature molten salt storage tank; when a high-pressure heater disassembly transient condition occurs, the system automatically switches feed water to a second heat exchanger, transports high-temperature molten salt in the storage tank to the second heat exchanger to heat feed water, and returns low-temperature molten salt after heat exchange and cooling to the low-temperature molten salt storage tank for storage. Through the system, the feed water temperature at the steam generator inlet can be stabilized, the cold and hot helium temperatures of the primary loop are further stabilized, reactor accidents caused by severe condition fluctuations are prevented, the risk resistance of the unit is improved, the unit can be stably operated and power generation is maintained, and the system has high safety and economy.

The invention provides a reactor outlet temperature control method and system of a miniature high-temperature gas cooled reactor nuclear power supply device, the nuclear power supply device and a nuclear power supply system, and belongs to the technical field of miniature high-temperature gas cooled reactor control. The control method comprises the following steps: acquiring a helium temperature set value, a helium temperature measured value, a reactor power measured value and a load set value of a reactor outlet; determining a reactor power target value according to a helium temperature set value and the helium temperature measurement value; determining a target rod speed according to the reactor power measurement value, the reactor power target value and the load set value; and driving the control rod to move according to the target rod speed so as to adjust the reactor power and realize helium temperature control of the reactor outlet. The control method is used for solving the problems that the temperature-power disturbance amplification effect caused by the low inertia of the miniature high-temperature gas cooled reactor and the mismatch contradiction of the dynamic response of the first / second loop cannot be inhibited in the prior art.

The application relates to the technical field of nuclear reactor engineering safety, and discloses a helium temperature field technical balancing device and method for a high-temperature gas cooled reactor, which comprises a reactor hot gas guide pipe, a mixed flow guide component fixed in the guide pipe, a temperature monitoring array, an active spoiler system integrated on the component and a control unit. The mixed flow guide component has a porous honeycomb structure, and the active spoiler system comprises rotatable spoilers and a wall-penetrating driving mechanism. According to the application, the airflow is physically divided by the static honeycomb structure, the spoilers are deflected by driving the spoilers according to the real-time monitored temperature difference data by the control unit, directional disturbance is applied to the local high-temperature area, thermal expansion compensation and pressure boundary sealing design are adopted, the high-temperature and high-pressure working conditions are adapted, and the fault reset function is provided, so that the helium thermal stratification problem is effectively solved, and the safe operation of the reactor hot gas guide pipe and downstream equipment is guaranteed.

The application provides a kind of double-component propulsion system tank filling pressure control method and device, the method comprises: according to the filling propellant mass of double-component propulsion system on filling day, target orbit tank pressure and helium dissolution rate after orbit, determine helium air cushion filling pressure on filling day;According to helium air cushion filling pressure, determine helium filling mass on filling day;Obtain tank telemetry data of double-component propulsion system on the day of air supplement;According to the helium filling mass on filling day, tank telemetry data, filling propellant mass and helium dissolution rate on the day of air supplement, determine the filling helium temperature on filling day;According to the filling helium temperature on filling day, target orbit tank pressure and helium dissolution rate after orbit, determine tank air cushion adjustment pressure on the day of air supplement.The scheme can realize the quantitative control of tank target filling pressure within the effective control precision range.

A circulating refrigeration system without liquid helium consumption. The system comprises: a liquid-helium-free refrigerating machine (40); a copper shielding tube (10), one end of the copper shieldi

The invention discloses a high-pressure hydrogen, oxygen and helium filling device and method. Comprising a liquid oxygen tank group, a hydrogen tank group, a helium tank group, a liquid oxygen pressurization system, a hydrogen pressurization system, a helium pressurization system, a heat exchange system, an oxygen temperature and flow control system, a hydrogen temperature and flow control system, a helium temperature and flow control system, a filling gun isolation device, an autoclave, a remote master control system and a data pipeline. The device can simulate actual conditions of hydrogen, oxygen and helium filling in a closed space in a high-pressure environment, and research on a high-pressure closed hydrogen, oxygen and helium mixing rule and filling accuracy is carried out.