9 results about "Flow boiling" patented technology

The invention discloses a flow boiling radiator fin structure and a design method thereof.The flow boiling radiator fin structure comprises a heat dissipation shell and profiling dune sets, the heat dissipation shell is provided with an inlet and an outlet, and the multiple profiling dune sets are fixed in the heat dissipation shell and arranged between the inlet and the outlet in parallel at equal intervals; each profiling sand dune group is formed by arranging a plurality of crescent-imitated sand dune fins at equal intervals, the arrangement direction of the crescent-imitated sand dune fins is perpendicular to the flowing direction from the inlet to the outlet, the protruding end of each crescent-imitated sand dune fin faces the inlet, and the concave end of each crescent-imitated sand dune fin faces the outlet; according to the structure, the flow boiling heat exchange efficiency can be improved, meanwhile, steam bubbles can be effectively guided to be separated from a path, the flow resistance is reduced, the performance adjusting requirements under different heat load and flow conditions are met, the more efficient and more reliable two-phase cooling system structure configuration can be easily achieved, and the heat dissipation requirement of high-heat-flux application is met.

The invention belongs to the technical field of LED lamps, and particularly relates to a heat dissipation structure and a high-power LED lamp with the same. The heat dissipation structure comprises a supporting plate, a concave groove is formed in the supporting plate, a heat dissipation assembly is arranged on the concave groove, a boiling box is fixedly arranged at the top of the supporting plate, and a collecting groove is formed in the top of the boiling box; condensing pipes are symmetrically connected to the collecting tank in an array mode, heat dissipation fins are fixedly arranged on the condensing pipes, a backflow box is arranged on the boiling box, and a partition plate is arranged in the backflow box. The boiling box is adopted, multiphase flow boiling enhanced heat transfer is adopted for cooling treatment, a working medium can absorb a large amount of phase change latent heat in the process of changing from a liquid state to a gas state, and therefore heat generated by working of the LED lamp is rapidly taken away, and compared with traditional pure metal heat conduction and air natural convection, huge heat can be rapidly taken away in a short time, and the service life of the LED lamp is prolonged. And the overall heat dissipation performance is improved.

This invention discloses an experimental apparatus and its fabrication and experimental method for studying the effects of local deformation in a narrow rectangular flow channel. The apparatus includes an experimental chamber formed by the detachable and sealed connection of upper and lower pressure-bearing shells, independent chambers connected at both ends, and replaceable deformable insert components. The insert body is integrally machined onto the surface of a heating plate and fixed to a placement slot in the lower pressure-bearing shell using thermally conductive adhesive. The apparatus integrates electrode components, multi-point fiber optic temperature measurement, and a liquid film sensor, and is equipped with wide and narrow viewing windows for observing bubble behavior and liquid film dynamics, respectively. The viewing windows utilize a window gasket + pressure plate + bolt structure for reliable sealing. During fabrication, each component is machined separately, then the heating plate, electrodes, and sensors are installed sequentially, and finally the upper pressure-bearing shell is closed and the viewing windows are assembled. This apparatus features a compact structure, reliable sealing, high visualization, and supports rapid replacement of deformable inserts with different geometric parameters, making it suitable for high-precision thermo-hydraulic experimental research on flow boiling and heat transfer deterioration.

The invention relates to a micro-channel flow boiling test system capable of adjusting heat flow and a measurement method. The system comprises a cooling working medium circulating system, a heating system, a flow visualization system and a data acquisition and display system. The micro-channel flow boiling heat exchange characteristic test is carried out under different types of heat flow, the actual heat source heating working condition is simulated, and the specific influence of the heat source property on the flow boiling heat exchange process in the micro-channel is obtained by comparing the flow heat transfer performance data under different types of heat flow. Compared with the prior art, the device has the advantages of avoiding backflow of bubbles at the outlet of the micro-channel under a low heat flow condition, realizing accurate measurement of dynamic behaviors and flow patterns of the bubbles in the micro-channel, and the like.

This application provides a targeted immersion phase change heat sink, relating to the field of electronic device heat dissipation technology, to address the problems of large coolant consumption and potential safety hazards. It includes a housing and a microchannel heat dissipation structure. The housing is equipped with cooling medium pipelines and vapor pipelines. The microchannel heat dissipation structure is disposed within the housing, with its cooling medium inlet connected to the cooling medium pipelines. The cooling medium is introduced into the microchannel heat dissipation structure, where it undergoes flow and boiling. The resulting two-phase fluid, after absorbing heat, exits from the cooling medium outlet of the microchannel heat dissipation structure into the immersion chamber of the housing. Vapor enters the gas phase space and exits through the vapor pipeline, while liquid remains in the liquid phase space of the immersion chamber and flows over the outer surface of the microchannel heat dissipation structure, which has a porous layer. By concentrating two-phase immersion cooling and flow boiling cooling within a single housing, only localized cooling of the chip is achieved, reducing coolant consumption and providing a stable and reliable thermal management environment.

The present application relates to a kind of plate heat exchanger refrigerant flow boiling heat flow simulation method and the prediction system of the method is executed, by based on nucleation point approximation Poisson distribution and dryout region wall heat flow partition model, nucleation point distribution and its influence on heat transfer are characterized, while through the wall surface partition design of space-time two dimensions, wall heat flow partition model covering full boiling condition is built, in combination with the multi-item coupling calculation of total heat flow and the fine modeling of dryout region, the prediction interval of boiling heat transfer is effectively widened, can realize nucleate boiling, critical heat flow and the accurate calculation of wall heat flow of transition boiling full working condition.

The invention discloses a flow boiling liquid cooling plate structure and a design method thereof.The flow boiling liquid cooling plate structure comprises a plate body and regulation blocks, the plate body is provided with an inlet and an outlet, and the multiple regulation blocks are evenly distributed in the plate body and located between the inlet and the outlet; the regulation and control block is provided with an incident flow surface facing the inlet, a back flow surface facing the outlet, a sliding boundary line for connecting the incident flow surface and the back flow surface, an incident flow ridge line and a wake contour line for connecting the incident flow surface and the back flow surface with the plate body respectively, a plurality of micro pits and a plurality of micro grooves which are uniformly formed in the incident flow surface, and a plurality of micro bosses which are uniformly arranged on the back flow surface; through the synergistic effect of macroscopic and microcosmic structural design and function partition, the regulation and control block can effectively regulate and control the vapor-liquid interface evolution process under the condition that strong turbulent flow disturbance is not introduced, and therefore efficient heat exchange and low flow resistance are both considered under the working condition of high heat flux density.