39 results about "Turbulent heat flux" patented technology

A heat exchanger tube for conveying a heat transfer fluid, into which one or more turbulence-inducing elements are fixedly positioned on a supporting member extending in spaced relation along the central axis of the tube. The turbulence-inducing elements have a first portion facing upstream and a second portion facing downstream. The entire exterior surface of the first portion forms a continuous solid surface that blocks and deflects the path of the flowing fluid.

The invention discloses an oil-immersed three-phase transformer, which includes a box body, the top of the box body is fixedly connected with a terminal group, and the outer walls of the front and back sides of the box body are fixedly connected with heat dissipation structures. The left end of the body is fixedly connected with an oil tank, and the top of the oil tank is fixedly connected with an oil conservator. Through the special structure of the air guide strip, according to the principle of aerodynamics, when the wind blows, the arc surface of the air guide strip away from the box will flow through the air at a faster speed, while the smooth surface of the air guide strip close to the box will flow through The airflow velocity is relatively slow, forming an air pressure difference, and the air near the box body of the air guide strip rushes toward the side of the arc of the air guide strip, forming a vortex, which accelerates the heat dissipation on the side of the heat sink close to the box body, and the two sides The guide directions of the two windshields are opposite, and the windshields in the opposite direction of the wind guide on both sides can guide the blown wind to the inside of the heat dissipation structure and lead it out from the other end, so that the wind can be guided up and down while forming a vortex, so that The cooling effect is better.

The invention belongs to the technical field of appliances for applying plasticizing substances on the building surface through the action of air pressure in building decoration engineering, and specifically relates to a spraying device for building decoration, which includes a bracket connected with a spray head and an air compression mechanism. There is a first cover set on the nozzle. The end of the first cover away from the support is connected with a ring-shaped heat pipe. The support is connected with a vortex tube. The air inlet of the vortex tube is connected with the air compression mechanism. The air outlet of the hot end is communicated with the inlet end of the heat conduction tube, and the air outlet of the heat conduction tube and the air outlet of the cold end of the vortex tube are jointly communicated with the nozzle. This solution solves the problem of relatively long drying time after the spraying operation of architectural decoration in the prior art.

The invention discloses a small modular reactor coolant system. In the system, liquid metal gallium is used as a coolant, a certain amount of gas is added to the coolant, and the natural circulation capacity of the liquid gallium metal is increased by the gas, which can also increase its Disturbance to enhance the heat transfer effect; through this system, the liquid gallium metal can be repeatedly increased or decreased, and the doped gas can also be arbitrarily increased or decreased, the air pressure can be adjusted, and the heat transfer capacity and natural circulation of the liquid gallium metal under various conditions can be recorded and analyzed. It provides basic data for building flexible and diverse small modular reactors.

The embodiment of the invention relates to an intelligent heating device. The intelligent heating device comprises a processing control module, a heating module, a steam cycle driving module, an air pressure control module, a power source module and a circuit module; the processing control module generates a heating control signal and a cycle driving control signal according to a starting command,and the heating control signal and the cycle driving control signal are sent to the heating module and the steam cycle driving module respectively; the heating module heats a liquid in a water tank to generate hot steam; the steam cycle driving module drives the hot steam to circulate to continuously and uniformly heat the to-be-heated object contained in the intelligent heating device; the processing control module obtains an air pressure value and a steam temperature value in the intelligent heating device; when the air pressure value reaches an air pressure threshold and the steam temperature value is lower than a preset temperature threshold, the processing control module generates an air pressure control signal and sends the air pressure control signal to the air pressure control module; the air pressure control module is started so that the hot steam is discharged from the intelligent heating device in a set volume.

The invention discloses a deep low temperature temperature control system for power devices, comprising: a liquid storage tank storing at least one of various cooling liquids suitable for different temperature zones; a gas supply module connected with the liquid storage tank , and provide compressed gas of different pressures to the liquid storage tank to squeeze out the coolant in the liquid storage tank; the fluid pipeline is connected to the liquid storage tank, and according to different flow rates, the coolant squeezed out from the liquid storage tank The coolant flows to the heat load to cool the heat load, and the flow rate of the coolant in the fluid pipeline is related to the pressure of the compressed gas provided by the gas supply module; the control module is respectively connected to the gas supply module and the heat load , and control the pressure of the compressed gas provided by the gas supply module to the liquid storage tank according to the acquired heating power of the heat load, so as to control the flow rate of the cooling liquid flowing in the fluid pipeline. The invention cools heat loads by extruding different kinds of cooling fluids through air pressure.

The invention discloses an operation method of a building cooling and heating system, including a cooling operation method and a heating operation method; the first step of the cooling operation method is to adjust the operation state; the second step is to start the operation through the general electric control device Frequency conversion compressor, first air-conditioning water pump and fresh air fan, the third step is to continuously carry out summer frequency conversion control, and the total electric control device performs air pressure adjustment and fresh air energy-saving adjustment; the heating operation method is carried out according to the following steps: The first step is to adjust the operating state The second step is that the staff start the frequency conversion compressor, the first air-conditioning water pump and the fresh air blower through the total electric control device, and the third step is to continue the winter frequency conversion control; at the same time, the total electric control device performs air pressure adjustment and fresh air energy-saving adjustment. The invention has simple steps, flexible control, is convenient to switch between the cooling operation method and the heating operation method, adopts various technical means to reduce energy consumption, can separately adjust each air-conditioned room, and the system runs very smoothly.

The invention relates to a design method of a supersonic laval nozzle structural alloy melt atomizer, and belongs to the field of alloy powder atomizing preparation. According to the design method, asupersonic laval wall curve is researched, the characteristic of close coupled atomization is combined, the supersonic laval nozzle structural atomizer is designed according to the suction pressure criterion, the close coupled criterion and the flow velocity criterion, and the influence of five main factors including the atomization gas pressure, the atomization gas temperature, the gas nozzle hole heart distance, the gas injection angle and the extended length of a diversion pipe on the flow field structure is simulated and researched by utilizing computational fluid dynamics software. Thus,structural parameters of a nozzle can be optimized, the phenomena of gas backflow and back spray are avoided, the atomizing efficiency is improved, and a guarantee is provided for the production of alloy powder. According to the atomizer, the phenomena of blockage of the diversion pipe, gas back spray and the like of the atomizer can be prevented, shock wave and turbulent flow are reduced, the flying distance of gas can be reduced, the flow velocity can be increased, and the loss of energy is reduced.

The invention discloses an ultra-long thickening device for a large-walled seamless steel pipe and a method for using the same, and belongs to the technical field of thickening of steel pipes. This scheme makes the heating part of the seamless steel pipe difficult to Bending to reduce the folding phenomenon of the inner wall of the seamless steel pipe. After the seamless steel pipe pier is roughly formed, the cooling water in the water tank is sprayed out through the nozzle to form cooling water mist, which cools the moving mold and the seamless steel pipe. The water after heat exchange is collected, and the water is pumped into the water tank through the water pump, so that the water in the water tank is recycled, and the liquid nitrogen in the liquid nitrogen tank is circulated in the spiral tube through the air pump to cool down the high temperature water. The nitrogen gas formed after the heat exchange is pressurized by the suction pump, so that the nitrogen gas is pressurized and liquefied again. With the help of the easy deformation of the memory alloy ring at low temperature, the seamless steel pipe can be taken more easily after the forming is completed. convenient.

The invention discloses a heat exchanger temperature control device, which comprises a heat exchanger assembly, a power assembly is installed at the top center of the heat exchanger assembly, a guide limit assembly is installed at the top of the power assembly, and the heat exchanger assembly includes a heat exchange The top of the heat exchanger body is fixedly installed with a water inlet, the top of the heat exchanger assembly is located on one side of the water inlet, and a water outlet is fixedly installed. A vertical rod is fixedly connected to the top of the main body of the device, and a horizontally arranged guide cylinder is fixedly connected to the top of the vertical rod. The invention is provided with a power component, when the temperature in the heat exchanger rises, the air pressure in the evaporation chamber rises to drive the power rod to move upward, and the power rod drives the piston rod to move through the transmission to increase the water flow passing area, so as to solve the inaccuracy of the traditional manual temperature control time. A problem that may lead to a decrease in product yield.

The invention relates to a full-field measuring system and a method for heat flux of a high-temperature high-speed turbulence. The system comprises a multi-source information fusion module, a synchronization controller, a dispenser of thermal long afterglow luminescent particles, a laser, a high-speed optical imaging system, and a combustion panel. Wherein the multi-source information fusion module performs complementary integration of the multi-source information for determining high-frequency information such as the density, velocity and temperature of a high-temperature and high-speed gaseous flow field characterized by a thermal tracer; the synchronization controller controls a supply of the combustion gas to the combustion panel, and controls the high-speed optical imaging system forimaging a time series long thermal afterglow image of the thermal tracer; the nitrogen gas is supplied to the particle dispenser to provide an input of the luminescent particle to the combustion panelas a tracer; the laser provides a laser light to the combustion panel. According to the full-field measuring system and the method for the heat flux of the high-temperature high-speed turbulence, themulti-source information fusion technology is fully utilized, the density, speed and temperature of the full field are synchronously measured, and the heat flux of the high-temperature high-speed turbulence is measured.

The invention belongs to the technical field of fire protection, in particular to a fire-fighting waterway heating equipment for fire trucks in cold regions, which includes a plurality of waterway pipes. The joints are connected to form the whole fixed waterway in the fire truck. The outer wall of the waterway pipeline is fixed with a thermal insulation shell, and a heat exchange chamber is formed between the thermal insulation shell and the outer wall of the waterway pipeline, and a circulation cavity is arranged inside the waterway pipeline. The present invention makes the air flow in the middle of the circulation cavity recoil to both ends, so as to realize the rapid disturbance of the air flow in the flow cavity through the heat exchange rate difference and improve the actual heating efficiency, and cooperate with the air pressure difference caused by heating and the swaying of the fire truck when driving The resulting expansion and contraction of the first spring drives the reciprocating motion between the two piston rings, improving the actual heating efficiency of the water pipeline.

The present invention provides an ocean turbulence heat flux meter and its use method, which utilizes ocean detection fast temperature sensor and acoustic Doppler three-dimensional point velocity (ADV) instrument, through acoustic Doppler three-dimensional point velocity instrument attitude data The current velocity data is corrected, and the turbulent heat flux in the vertical direction of the ocean is measured based on the covariance of the vertical velocity fluctuation and temperature fluctuation, so as to realize the measurement of the turbulent heat flux below the sea surface. The invention utilizes the ADV and the fast temperature sensor to realize the direct measurement of the turbulent heat flux below the sea surface. The ADV self-contained battery and memory are used for self-contained measurement, and the turbulent heat flux meter designed in the present invention can be integrated and work on the submerged mark, and can perform long-term and all-weather measurement.

The invention relates to a heat pump water heater. Specifically, the heat pump water heating device of the present invention includes: a heating chamber configured to have a predetermined vacuum degree and used to accommodate a heat transfer medium, so that the heat transfer medium is in a low-pressure environment whose air pressure is lower than standard atmospheric pressure; the first heat exchange device , located in the heating chamber and above the highest heat transfer medium liquid level in the heating chamber, configured to accommodate heated water; and a heat pump circulation system configured to heat the heat transfer medium in the lower part of the heating chamber to boiling under a low pressure environment, so that The heat transfer medium vaporizes and rises to form a gaseous heat transfer medium. At least part of the gaseous heat transfer medium heats the heated water. In the heat pump water heater device of the present invention, because the heat transfer medium is in a low-pressure environment, the heat transfer medium can be vaporized at a lower temperature. It turns into a gaseous heat transfer medium, and uses the latent heat and sensible heat of the gaseous heat transfer medium to heat the heated water, which significantly improves the heating energy efficiency ratio of the heat pump water heater and achieves the purpose of saving energy.