46results about How to "Enhanced convective heat transfer intensity" patented technology

The invention provides a heat exchange device utilizing combustion waste heat. The heat exchange device comprises a heat exchange core; the heat exchange core is arranged in a waste gas flue and comprises circular tubes; the circular tubes are arranged perpendicular to the flowing direction of waste gas; a plurality of dispersion heat exchange structures are arranged in the circular tubes in a segmented mode; each dispersion heat exchange structure comprises a core and a shell, wherein the core is arranged in the shell; the shells are fixedly connected to the inner walls of heat exchange tubes; each core is formed by arranging and combining a plurality of grating sheets; and the grating sheets are mutually connected to form grating holes. The heat exchange device has the advantages that the grating type dispersion heat exchange structures are arranged in the heat exchange tubes so as to separate a steam-water mixture in the heat exchange tubes, and therefore the film boiling phenomenon on the water side can be effectively reduced, the convective heat exchange intensity of the water side can be increased, the heat load of the heat exchange core can be reduced, and the heat exchange efficiency can be improved.

The invention discloses a liquid cooling plate radiator which comprises a radiator body, a cooling liquid flow channel is formed in the radiator body, and the cooling liquid flow channel is used for allowing cooling liquid to flow circularly, wherein the cooling liquid flow channel comprises a plurality of cooling sub-flow channels, then a plurality of fin units are arranged on the cooling sub-flow channels in the flowing direction of cooling liquid, each fin unit is provided with a plurality of fins extending side by side in the flowing direction of the cooling liquid, and the fins of the front-back adjacent fin units on the cooling sub-flow channels are arranged in a staggered mode. Therefore, the heat dissipation area is increased, the disturbance of the cooling liquid flowing in the heat dissipation sub-flow channels is enhanced, and the heat dissipation efficiency is improved; and therefore, the technical problems of limited heat dissipation area, low heat dissipation efficiency and the like caused by a single linear cooling liquid flow channel are solved, the contact area between the liquid cooling plate radiator and the cooling liquid is effectively increased, the heat dissipation efficiency is improved by increasing the disturbance of the cooling liquid, and the structure is simple.

The invention provides a heat exchange device utilizing combustion waste heat. The heat exchange device utilizing combustion waste heat comprises a heat exchange core body which is arranged in a waste gas flue. The heat exchange core body comprises round tubes, and the round tubes are arranged in the direction perpendicular to the waste gas flowing direction; suppose the distance between each round tube and a waste gas inlet is S, the inner diameter of each round tube is D; and suppose D=F(S), F'(S)<0, and F'(S) is the first-order differential coefficient of F(S). According to the heat exchange device, the round heat exchange tubes are adopted by the heat exchange core body, and the diameters of the heat exchange tubes become smaller gradually in the smoke flowing direction so that the probability of film boiling on the water side can be effectively lowered, the heat-convection heat exchange intensity of the water side is increased, the heat load of the heat exchange core body is reduced, and the heat exchange efficiency is improved.

The invention provides a heat exchange device utilizing combustion waste heat. The heat exchange device utilizing combustion waste heat comprises a heat exchange core body which is arranged in a waste gas flue. The heat exchange core body comprises round tubes, and the round tubes are arranged in the direction perpendicular to the waste gas flowing direction. The multiple dispersed heat exchange structures are arranged in the round tubes at intervals. The multiple dispersed heat exchange structures are arranged in the round tubes in the flowing direction of fluid in the round tubes, and the lengths of the dispersed heat exchange structures become larger gradually from inlets of the round tubes to outlets of the round tubes. According to the heat exchange device, the lengths of the dispersed heat exchange structures in the round tubes become large continuously in the direction away from the inlets of the round pipes so that the probability of film boiling on the water side can be effectively lowered, the heat-convection heat exchange intensity of the water side is increased, the heat load of the heat exchange core body is reduced, and the heat exchange efficiency is improved.

The invention provides a heat exchange device utilizing combustion waste heat. The heat exchange device comprises a heat exchange core; the heat exchange core is arranged in a waste gas flue and comprises circular tubes; the circular tubes are arranged perpendicular to the flowing direction of waste gas; a plurality of scattered heat exchange structures are arranged in the round tube at intervals; a plurality of dispersion heat exchange structures are arranged in the circular tubes in a segmented mode in the flow direction of fluid in the circular tubes; the distances between every two adjacent dispersion heat exchange structures become smaller and smaller from inlets of the circular tubes to outlets of the circular tubes. The heat exchange device has the advantages that the distances of the dispersion heat exchange structures in the circular tubes is continuously decreased along with the distance from the inlets of the circular tubes, and therefore the film boiling phenomenon on the water side can be effectively reduced, the convective heat exchange intensity of the water side can be increased, the heat load of the heat exchange core can be reduced, and the heat exchange efficiency can be improved.

The invention relates to the technical field of heat exchange, and discloses a first heat exchange plate and a microchannel condenser. The first heat exchange plate is provided with a steam inlet and a water discharge port, and a plate surface of the first heat exchange plate is provided with a plurality of condensation channels, and the two ends of each condensation channel are respectively connected with the steam inlet and the water discharge port; each condensation The channels include a plurality of single-row channels connected in series and at least one multi-row channel, a multi-row channel is connected between two adjacent single-row channels, and the multi-row channels include a plurality of parallel branch channels. The condensation channel of the first heat exchange plate provided by the embodiment of the present invention includes single-row channels and multi-row channels connected in series. When the first heat exchange plate is used as a steam condensation plate, the steam will repeatedly gather and separate in the condensation channel, strengthening the The convective heat transfer intensity of the condenser is improved, and the condensation heat transfer efficiency of the condensation channel can be significantly improved, thereby relatively reducing the volume of the condenser.

The invention provides burning waste heat utilization heat exchange device. The heat exchange device comprises a heat exchange core body, wherein the heat exchange core body is arranged in a waste gasflue, the heat exchange core body comprises round pipes, and the flow direction of the liquid in the round pipes is perpendicular to the flowing direction of the waste gas; a plurality of dispersingheat exchange structures are arranged in the round pipes in a segmented mode, each dispersing heat exchange structure comprises a core body and a shell, the core body is arranged in the shell, and theshell is fixedly connected to the inner wall of a heat exchange pipe; and each core body is formed by arraying and combining a plurality of grid pieces, the grid pieces are connected to form grid holes, and the hydraulic diameters of the grid holes in the different dispersed heat exchange structures are smaller and smaller from the inlet of the round pipe to the outlet of the round pipe. In the rising process, the round pipes are heated continuously, so that the vapor in the vapor-liquid two-phase flow is more and more, due to the fact that the vapor phase in the vapor-liquid two-phase flow is more and more, the heat exchange capacity in the round pipes can be relatively weakened along with the increase of the vapor phase, and the vibration and the noise can also be increased along with the increase of the vapor phase. Therefore, the hydraulic diameters of the grid holes of the adjacent dispersed heat exchange structures needing to be arranged are smaller and smaller.

The invention relates to an intake muffler used for a sound insulation cover of a compressor unit, which is mainly composed of an intake muffler box body, a zigzag type intake muffler channel and a right-angled triangular prism sound-absorbing structure. The air intake muffler box body is a quadrangular prism structure with trapezoidal side panels, and inside the box body is a plurality of broken-line air intake and muffler channels formed by arranging side-by-side right-angled triangular prism sound-absorbing structures in the form of broken lines; the right-angled The triangular prism sound-absorbing structure is composed of the inclined surface of the right-angled triangular prism sound-absorbing structure, the long right-angle surface of the right-angle triangular prism sound-absorbing structure, the short right-angle surface of the right-angle triangular prism sound-absorbing structure and the non-equal thickness cavity structure. The invention has the advantages of simple structure, quicker air intake speed, higher effective ventilation volume, effective control of noise transmission paths, significantly improved noise reduction effect, and the like.

The invention discloses a reaction device, a production system and a production method for preparing low-carbon olefin. The reaction device is a pressure reaction device and comprises a device body, the device body comprises a combustion chamber, a mixing chamber and a cracking chamber which are sequentially communicated, the mixing chamber comprises a Venturi section and a raw material inlet, andthe raw material inlet is formed in the lowest pressure position of the Venturi section. According to the reaction device, the independent mixing chamber is arranged, the raw materials are mixed withthe synthesis gas in the mixing chamber and directly exchange heat, and the cracking reaction is performed after the cracking temperature is reached so that the reaction time can be shortened, and the yield of the low-carbon olefin is increased; the mixing chamber is constructed to comprise the venturi section, and the raw material inlet is formed in the lowest pressure position of the venturi section so that turbulent flow with higher turbulence is formed, higher convective heat exchange strength is achieved, raw materials can be quickly mixed and subjected to heat exchange with synthesis gas, and shorter retention time can be achieved.

The invention provides a device capable of enhancing the heat dissipation efficiency of a jet radiator, a heat dissipation component and a production method. The device comprises a device body, wherein a bottom cover is arranged at the bottom of the device body; the bottom cover is provided with a plurality of conical bulges; an ejection cavity is arranged in the upper part of the bottom cover; the bottom surface of the ejection cavity is provided with a plurality of nozzles; a top cover is arranged at the top of the ejection cavity; and a heat dissipation cavity is arranged between the bottomcover and the bottom surface of the ejection cavity. Liquid-cooled working mediums are subjected to jet impingement to structural top ends of the conical bulges and flow downwards along the wall surfaces of the conical bulges, formation of a boundary layer of a jet impingement cooling wall jet region is destroyed by virtue of the structure characteristics of the conical bulges and the gravity action, meanwhile, regional liquid-cooled working mediums among the conical bulges have relatively large kinetic energy, the liquid-cooled working mediums in different directions collide with one anotherand the flow disturbance is further enhanced, thereby reducing heat resistance in the heat transfer process and enhancing the convection heat transfer intensity.

The invention provides a heat exchange device capable of realizing combustion waste heat utilization. The heat exchange device comprises a heat exchange core and a casing; the heat exchange core is arranged in the casing; an upper header and a lower header are formed by the space between the heat exchange core and the casing; the casing comprises an upper casing and a lower casing; the upper casing comprises an upper casing front frame type baffle and an upper casing back frame type baffle which adopt identical structures; semi-circular holes penetrating through baffles are formed in middle areas of the upper parts of upper baffles; the upper baffle of the front frame type baffle is transversely placed at the front end of the heat exchange body upper casing and the front end of the heat exchange core and is fixed on the inner side of the heat exchange body upper casing; and side baffles of the front frame type baffle are located at the back part of the upper baffle of the front frame type baffle as well as the left side and the right side of the heat exchange core. With the heat exchange device, the baffles and flow guide plates are arranged on the heat exchange body upper casing and the heat exchange body lower casing, so that the thermal load of the heat exchange core is reduced while the heat exchange temperature difference is increased.

The invention discloses a supercharging cooling structure for a gas turbine moving blade by utilizing the rotation effect. The structure is specifically composed of a flow-to-intermediate partition plate, a multi-stage Z-shaped rotary booster cavity, and an impact-convection series cooling layer, all of which are located inside the gas turbine moving blades, and the Z-shaped rotary booster cavity passes through the separation pressure. The surface and suction surface supply air to the cavity and organize the radial flow direction in the air supply cavity, and use the rotating Coriolis force to increase the air supply pressure of the shock-convective series cooling layer and reduce the air supply pressure gradient between the suction and pressure surfaces; shock- The convection series cooling layer plate increases the Reynolds number by collecting the impinging cooling air flow, and adopts the radial guide baffle with the guide slit to enhance the transverse vortex formed by the rotating Coriolis force in the radial convection heat exchange chamber, which effectively improves the heat transfer rate. thermal coefficient. The invention can utilize the rotation effect to reduce the demand for the cooling air extraction pressure and air extraction volume, and effectively enhance the cooling performance.

The invention discloses a biogas tank and a method for setting heat exchange tubes thereof. The heat exchange tubes are embedded on the fins with U-shaped slots integrated with the biogas tank, and the position of the slots is determined according to certain rules, so that the heat exchange tubes It is in the form of a spherical helix, and the water supply and return pipes are arranged at intervals. The method includes the installation arrangement method of the spherical spiral pipe, the determination method of the screw pitch, and the calculation method of the pipe length. First of all, according to the shape and material of the biogas digester, the layout form of the spiral heat exchange tubes, the type of installation components and the calculation of the slot position of the fixed heat exchange tubes are proposed. Then, the effect of tube spacing on heat transfer is analyzed, and the pitch of the helical tube is determined by numerical simulation method according to the heat transfer principle. Finally, in the case of determining the heat medium and biogas fermentation parameters, according to the principle of energy conservation, the length of the required spiral tube is obtained by trial calculation.

The invention provides a design method of a secondary air inlet barrel and a combustor system thereof. Two ends of a secondary air inlet cylinder are opened, one end of the secondary air inlet cylinder is connected to the large diameter end of a transitional barrel to form a diffused combustion space and the other end of the secondary air inlet cylinder is connected to the large diameter end of a third-time air inlet transitional ring to serve as a diffused combustion exhaust channel. The secondary air inlet barrel is characterized in that multiple rows of air inlet holes are formed in the secondary air inlet cylinder, and the inner diameters of the air inlet holes are increased and decreased successively in a direction from the transitional barrel to the third-time air inlet transitional ring. By means of change of the inner diameters of the air inlet holes, the flow of combustion air changes axially regularly according to the fuel combustion condition in the secondary air inlet cylinder, so that the combustor achieves the optimum combustion efficiency.