64results about How to "Low heat transfer coefficient" patented technology

A gage for measuring a diameter of a workpiece has a pair of parallel spaced apart side rails. A pair of block sets is mounted between the side rails and spaced apart from each other. A pair of arms extends transverse to the rails through mating profiles in the blocks of each block set. The arms are slidable in a transverse direction to the side rails. Each block set can slide along the side rails and has a single fastener that secures the blocks to the side rails and the arms to the blocks in a desired position. Drag brakes between the blocks and the side rails prevent the components from sliding of their own weight while the fasteners are loosened. The block sets and arms are rotatable 180 degrees about the fasteners when loosened to accommodate outside and inside measurements.

A fabricated concrete foundation wall is provided with a plurality of insulation panels and reinforcing ribs to improve strength and reduce the density of the wall panel. The foundation wall panels are easily placed and interconnected together to quickly provide a foundation adapted to support the main walls of a home, for example. The foundation panels in one embodiment generally include a facewall that may have at least one carbon fiber band positioned horizontally therethrough to provide additional stiffness.

A modular handguard device configured to be slidably mated to an outer surface of an existing or affixed handguard. The handguard of the present invention may be configured to mate with any handguard to provide an extension of the handguard for purposes including mitigation of detectable heat signature, operator safety and increased reconfigurability of firearms for mission specific needs.

The invention relates to a polymerization method for preparing rare earth isoprene rubber, which adopts at least three reactors which are in series connection to conduct a solution polymerization reaction of an isoprene monomer, wherein a first reactor is an annular tube reactor which adopts isothermal operation, a following reactor is a continuous stirrer tank reactor which adopts heat insulation operation. By means of the method, the cis-form-1,4-configuration content of obtained gathering rare earth isoprene rubber can be high as 98wt%, the number-average molar mass can reach over 0.4 million, and molecular weight distribution coefficient is smaller than 3.

A fabricated concrete foundation wall is provided with a plurality of insulation panels and reinforcing ribs to improve strength and reduce the density of the wall panel. The foundation wall panels are easily placed and interconnected together to quickly provide a foundation adapted to support the main walls of a home, for example. The foundation panels in one embodiment generally include a facewall that may have at least one carbon fiber band positioned horizontally therethrough to provide additional stiffness.

The invention discloses a marine solid oxide fuel cell and steam-injected gas turbine combined generating system and a marine solid oxide fuel cell and steam-injected gas turbine combined generating method. The air input port of the air compressor of the system is used for introducing air, the air output port of the air compressor is connected with a heat regenerator, the gas output end of the heat regenerator is connected with a cell stack cathode, the fuel output end of a fuel bottle is connected with the fuel input end of a pre-reformer, the output end of a distilled water heater is connected with the pre-reformer, the output end of the pre-reformer is connected with a cell stack anode, the anode discharge gas output pipeline and the cathode discharge gas output pipeline of a solid oxide fuel cell are used for a combustion chamber, the exhaust gas output end of the combustion chamber is connected with the gas inlet of a turbine, the gas outlet of the turbine is connected with the gas inlet of the heat regenerator, the exhaust gas outlet of the heat regenerator is connected with a waste heat boiler through an exhaust gas transmission pipeline, and the superheated steam output endof the waste heat boiler is connected with the superheated steam input end of the combustion chamber. The system realizes waste heat utilization of a marine auxiliary boiler.

The invention discloses an interrupted groove blade top structure with transverse seam holes for a turbine blade. The structure is characterized in that a suction surface side groove wall and a pressure surface side groove wall are arranged on a blade top, the transverse seam holes are formed in the broken groove wall, the interrupted part of an interrupted groove is positioned on the pressure surface side, and the interrupted starting position is positioned at a front edge stationary point. By eliminating a gas reattachment area formed in the groove blade top in the interrupted area, the heatexchange coefficient of the front edge area of the blade top is effectively reduced, the local heat exchange strength is weakened, and the cooling characteristic of the blade top is improved. The transverse width of the groove can be controlled through the reasonable length of the pressure surface side groove wall, so that only one backflow vortex is formed in the groove after fuel gas enters thegroove, and the gas reattachment area in the groove is eliminated; and the transverse seam holes can effectively improve the transverse coverage area after jet flow outflow, the local air film cooling efficiency of the blade top is improved, the working efficiency of the turbine power blade is effectively improved, and the overall performance of an aero-engine is improved.

A compressor, particularly a radial compressor, for a turbocharger comprises a compressor impeller (1), which is rotatably received in a compressor housing, wherein cooling fluid flows through a part (6) of the compressor housing adjacent to the compressor impeller. The compressor impeller comprises at least partially a heat input reducing coating (2).

The invention mainly relates to the technical field of synthesis ammonia and low-temperature liquid nitrogen, and relates to the technology of a three-stage back heating multi-strand winding pipe type heat exchange device for the low-temperature liquid nitrogen. Through N2-H2 synthesis gas synthesized by H2 at the temperature of 191.5 DEG C below zero and the pressure of 1.8MPa and N2 at the temperature of 193.4 DEG C below zero and the pressure of 5.19MPa, through waste nitrogen N2-Ar-CO-CH4 at the temperature of 191.5 DEG C below zero and the pressure of 0.18MPa and through compensated high pressure LN2, N2 at the temperature of 127.2 DEG C below zero and the pressure of 5.7MPa is cooled to be N2 at the temperature of 188 DEG C below zero and the pressure of 5.6MPa, and purified gas H2-N2-CO-Ar-CH4 washed by low-temperature methanol is cooled to be purified gas at the temperature of 188.2 DEG C below zero and the pressure of 5.21MPa, namely, the incoming high-pressure N2 and the purified gas washed by the low-temperature methanol are cooled through cooling capacity back heating of the washed N2-H2 synthesis gas, high-pressure H2 and the waste nitrogen, and the temperature condition for washing the purified gas through the low-temperature liquid nitrogen is provided for a washing tower. The three-stage back heating multi-strand winding pipe type heat exchange device for the low-temperature liquid nitrogen is compact in structure and high in heat exchange efficiency and can be used for solving the technical problems of the three-stage six-strand four-bundle winding pipe type heat exchange for the low-temperature liquid nitrogen with the temperature ranging from 127.2 DEG C below zero to 193.4 DEG C below zero, and the low-temperature heat exchange efficiency of a low-temperature liquid nitrogen process system is improved.

The invention discloses a mixed baffling stream type reboiler. The mixed baffling stream reboiler comprises a shell body and a support which is arranged at the lower part of the shell body and is used for supporting the shell body, shell side in-out ports are correspondingly arranged at two ends of the shell body, multiple groups of tube bundles are arranged at intervals in the axial direction of the shell body in the shell body, baffling stream plates and baffling stream fences are arranged in the radial direction of the tube bundles in the shell body, and the baffling stream plates and the baffling stream fences are used for supporting the tube bundles and conducting stream guidance on shell side fluid. The mixed baffling stream type reboiler is reasonable in structure and safe and efficient in work, and combines an optimal heat transfer property and a minimum flow-induced vibration property.

The invention relates to the field of wide and thick plate blanks for a wide and thick plate mill, in particular to a manufacturing process of a high-quality wide and thick plate blank, which is used for manufacturing a wide and thick plate blank for a wide and thick plate mill and solving the problems of higher manufacturing cost, lower efficiency and the like in the prior art, wherein the thickness of the wide and thick plate blank is 350 to 1,200mm. A water-cooling moving die is separately arranged on the front, back, left and right four faces of a tool water-cooling chassis; and the water-cooling moving dies arranged on the front, back, left and right four faces and the water-cooling chassis arranged on the lower part form a combined water-cooling die. The wide and thick plate blank is manufactured by using a high-efficiency water-cooling blank casting machine; and the high-efficiency blank casting machine adopts a hydraulic power system to extrude a casting blank, so that the wide and thick plate blank is solidified and crystallized under the action of a pressure, and internal shrinkage cavities and looseness of the wide and thick plate blank are eliminated. At the same time, a clearance between the die and the casting blank is controlled, the interface heat exchange coefficient between the casting blank and the die is adjusted, and surface cracks of the wide and thick plate blank are eliminated, by using the hydraulic power system, so the wide and thick plate blank with high quality is obtained finally.

The invention relates to a semiconductor power generation device using flue gas waste heat of a rear smoke channel of a boiler. The semiconductor power generation device comprises a boiler rear smoke channel (101) and a thermoelectric power generation device (109). The thermoelectric power generation device consists of a hot end surface (110), a cold end surface (102), a leading-out wire (103), welding points (104), guide plates (106), P type semiconductors (107), N type semiconductors (108), and a thermal insulation material layer (111). Cooling holes (105) are formed in the cold end surface. The thermoelectric power generation device is connected with the boiler rear smoke channel by the thermal insulation material layer. According to the thermoelectric power generation device, a temperature difference is generated between the hot end surface (110) formed by flue gas waste heat and the cold end surface (102) under an atmospheric temperature, so that the P type semiconductors and the N type semiconductors generate electromotive forces respectively. The P type semiconductors and the N type semiconductors are connected in series by the guide plates; and the generated electrical energy is outputted to the user based on the welding points and the leading-out wire. According to the invention, with the heat sensitivity of the semiconductors, the flue gas waste heat is utilized and the low-temperature waste heat is converted into the electric energy directly, so that no pollution is caused and installation is convenient; and the effect of energy conservation and emission reduction is realized well.

The invention discloses a heat exchanger with net type lung-shaped heat exchange plates. The heat exchanger with the net type lung-shaped heat exchange plates comprises net type heat exchanger plates, a heat exchanger shell, a liquid inlet tube and a liquid outlet tube, wherein the net type heat exchanger plates are distributed in the heat exchanger shell from top to bottom at equal intervals to form a lung-shaped hollow structure; the liquid inlet tube and the liquid outlet tube are respectively arranged on the heat exchanger shell in the longitudinal direction; and according to each net type heat exchanger plate, two plate bodies with through holes are superposed vertically, the peripheries of the plate bodies and side seams of the through holes are welded together in an argon arc welding or laser welding mode, and a fluid channel in each plate is formed. By the heat exchanger with the net type lung-shaped heat exchange plates, fluid flowing resistance of the outside of each plate is reduced, meanwhile, large Reynolds number can be obtained at low speed, turbulent flow is formed, heat exchange coefficient is increased effectively, therefore, the heat exchanger is simple, efficient and energy-saving, and is compact in structure, occupied space and initial investment are saved, the resistance of the product is lower than that of a traditional plate type heat exchanger, and the heat exchange coefficient can be high.

The invention discloses a contact heat exchange desulfurization and denitrification integrated natural gas condensation boiler. A smoke outlet of a combustor communicates with a smoke inlet of a boiler body; a water outlet of a smoke water feeding heat exchanger communicates with a water inlet of the boiler body; a smoke inlet of the smoke water feeding heat exchanger communicates with a smoke outlet of the boiler body; a smoke inlet of a contact condensation smoke cooler communicates with the smoke outlet of the smoke water feeding heat exchanger through a first pipeline; an ozone adding port is formed in the first pipeline, and communicates with an ozone adding device; a wet air outlet of a contact air heater communicates with a combustion assistance gas inlet of the combustor; and a condensation absorbing liquid inlet of the contact air heater communicates with a condensation absorbing liquid outlet of the contact condensation smoke cooler. The desulfurization and denitrification natural gas condensation boiler is simple in structure, environment-friendly, high in efficiency, lower in investment cost and higher in utilization rate of latent heat of water vapor in discharged smoke.

The invention discloses a compound type heat pump unit and a concentrated heating system. The compound type heat pump unit comprises an absorption type heat pump, a compression type refrigerator, a heat exchanger, a primary side pipeline and a secondary side pipeline. The absorption type heat pump comprises a generator, an absorption type heat pump condenser, an absorber and an absorption type heat pump evaporator. The compression type refrigerator comprises a compression type refrigerator evaporator and a compression type refrigerator condenser, the primary side pipeline is sequentially connected with the generator, the heat exchanger and the compression type refrigerator evaporator in series in the water flowing direction, and the primary side pipeline is only connected with the generator and a generator in the absorption heat pump evaporator. According to the compound type heat pump unit, primary water pressure drop is reduced, and meanwhile the low primary water return temperature can be ensured.

The invention discloses an energy-saving window. The energy-saving window comprises a window frame fixed on a wall body, a movable window body hinged to the window frame and a fixed window body hermetically connected with the movable window body. The outer layer and the inner layer of the movable window body are connected by a first heat insulation plate, and the outer layer and the inner layer ofthe fixed window body are connected by a second heat insulation plate; the inner layer of the movable window body is provided with a first sealing strip which is hermetically abutted to the fixed window body; the outer layer of the fixed window body is provided with a second sealing strip which is hermetically abutted to the movable window body; the side surfaces of the fixed window body are provided with third foaming sealing rubber strips which are hermetically abutted to the side surfaces of the movable window body; the movable window body is also provided with fourth foaming sealing rubber strips which are hermetically abutted to the fixed window body; the fourth foaming sealing rubber strips are connected with the inner surface of the inner layer of the movable window body; and the surfaces, which are hermetically abutted to the fixed window body, of the fourth foaming sealing rubber strips are positioned on the plane where the inner surface of the inner layer of the movable window body is located. According to the energy-saving window, through arrangement of the multi-sealing structure, the temperature transmission efficiency of the two sides of the window is reduced, and the indoor temperature is effectively kept, so that the energy is saved and the energy consumption is reduced.

The invention relates to a marine flowing type evaporator. The marine flowing type evaporator comprises a cylinder, a heat exchange tube bundle, an exhaust pipe and a liquid inlet; the inner wall of the cylinder is fixedly provided with a set of baffle plates perpendicular to the inner wall of the cylinder; the baffle plates are provided with small holes for enabling the heat exchange tube bundle to penetrate through; the baffle plates divide the internal of the cylinder into refrigerant channels for enabling a refrigerant to scour the heat exchange tube bundle in a reciprocating manner; the exhaust pipe is vertically upward; a liquid inlet pipe can be arranged in any corresponding position on the cylinder according to arrangement of the refrigerant channels; and the flowing direction of non-refrigerant liquid in the heat exchange tube bundle is opposite to the flowing direction of the refrigerant in the cylinder. The marine flowing type evaporator has the advantages of a dry evaporator, a full-liquid evaporator and a falling film evaporator, meanwhile, overcomes the defects of the three evaporators, and has such characteristics as compact structure, convenience in oil return, low injecting quantity of the refrigerant, high heat exchange coefficient and high degree of freedom in liquid inlet setting.