82results about How to "Increase the heat transfer surface area" patented technology

An EGR cooling system is provided. The EGR cooling system comprising a plurality of EGR coolers configured to cool the EGR to a plurality of successively lower temperatures, where at least one of the plurality of EGR coolers includes a finned EGR cooler that comprises a plurality of channels for dissipating heat in the EGR, the plurality of channels increasing heat transfer surface area while having sufficient fin spacing to avoid clogging. The EGR cooling system may further comprise a catalyst configured to remove particle matters and/or hydrocarbons from the EGR, the catalyst positioned upstream of at least one of the plurality of EGR coolers.

To provide a gas turbine combustor having an improved cooling structure effective to efficiently suppress a possible occurrence of buckling in the combustion liner while exhibiting a convection cooling effect to the combustion liner, the gas turbine combustor includes a combustion liner having a combustion chamber defined therein and an outer peripheral surface forming a path of a compressed air, and a heat transfer enhancement structure provided on the outer peripheral surface of the combustion liner. The heat transfer enhancement structure referred to above is of a honeycomb construction defined by ribs protruding outwardly from the outer surface of the combustion liner. The honeycomb construction may be of a geometry in which hexagonal shapes, rhombic shapes, parallelogrammic shapes, bent rectangular shapes or triangular shapes are deployed next to each other.

A rapid refrigeration apparatus includes a container having a container upper end, a container wall with a container opening in the container upper end bordered by a container rim; a beverage retaining vessel extending within the container defining an annular refrigerant chamber between the container and the vessel containing a liquefied refrigerant and refrigerant vapor, and the vessel containing flowable vessel contents, the vessel being sized to fit at least partly through the container opening, the vessel including a vessel rim secured relative to the container rim, and a vessel wall including at least one reversible bulge; a lid sealingly secured to the container rim and including a lid opener mechanism for releasing the vessel contents from the vessel and container for consumption; the lid opener mechanism including a lid opener mechanism activation mechanism for voluntarily opening the lid opener mechanism at a selected moment in time; and a refrigerant release mechanism for releasing the refrigerant from the annular chamber into the atmosphere surrounding the apparatus; the refrigerant release mechanism including a refrigerant release mechanism activation mechanism for voluntarily opening the refrigerant release mechanism at a selected moment in time.

A method of increasing the power of a carbonaceous fuel combusting boiler system includes the steps of (a) feeding carbonaceous fuel into a furnace of the boiler system, (b) feeding oxidant gas into the furnace for combusting fuel to produce exhaust gas, (c) discharging the exhaust gas from the furnace via an exhaust gas channel, (d) conveying a stream of feedwater from a boiler economizer arranged in the exhaust gas channel to evaporating and superheating heat exchange surfaces arranged in the furnace and in the exhaust gas channel for converting the feedwater to superheated steam, (e) expanding the superheated steam in a high-pressure steam turbine for generating power, (f) extracting steam from the high-pressure steam turbine at a decreased rate for preheating the feedwater, (g) conveying steam from the high-pressure steam turbine at an increased rate to a reheater arranged in the exhaust gas channel for generating reheated steam, (h) expanding the reheated steam in an intermediate pressure steam turbine for generating power, and (i) conveying the exhaust gas in the exhaust gas channel from the reheater through a boiler economizer to a gas heater. The heat exchange surface area of at least one of the reheater and the boiler economizer is increased and/or a high pressure economizer is added downstream of the boiler economizer and upstream of the gas heater.

A heat exchange assembly for generating steam from a second medium to be used to drive a steam turbine for generating electricity or for other process, includes a tube having a longitudinal axis and an inner wall and an outer wall. The outer wall includes a plurality of spaced fins oriented generally perpendicular to the longitudinal axis. The inner wall defines a preheat zone and a dual phase zone. The preheat zone defines a helical rib configured to provide swirling motion and increase heat transfer surface area to liquid entering the tube increasing heat transfer from the tube to the liquid. The dual phase zone is spaced from the preheat zone and defines a helical rib configured to provide swirling motion to steam and liquid passing through the dual phase zone increasing heat transfer from the tube to the steam and liquid while preventing vapor stagnation and film boiling.

The method discloses a method and device for forming high-pressure and low-temperature jet flow by cutting coolant. The method includes that compressed air stored inside an air storage tank is filtered and dried and connected to a tee joint through a hose to divide an output pipe into two branches, air in one branch is cooled by a cooling device to become low-temperature high-pressure air, and inputted into an air inlet end of a pneumatic spray nozzle after being connected with one or more than one tee joint, the air in the other branch is inputted into a well-sealed cutting fluid storage container after pressure in the air is regulated by a pressure regulating valve, the cutting fluid is pressed out, and connected into liquid inlet ends of a plurality of pneumatic spray nozzles after passing one or more than one tee joint prior through the hose, the air and the liquid are mixed outside a jet nozzle to produce high-speed jet flow. By the method, usage amount of cooling lubricating liquid is reduced, cooling and lubricating functions of fluid medium are fully performed, cutting temperature is greatly lowered, and tool durability is conspicuously improved.

This invention relates to an apparatus for conditioning the temperature of a fluid by utilizing a thermoplastic heat exchange apparatus comprised of a plurality of hollow tubes. The apparatus controls the temperature of a process fluid inside the heat exchanger by adjustment of a control valve that regulates the flow of an exchange fluid. The apparatus can be used to maintain the temperature of chemical baths and also to prepare discreet dispensed volumes of temperature controlled liquid.

The present invention provides a deep fat fryer providing an oil vat for holding hot oil. The hot oil of the vat is heated by a heat exchanger system that includes a pair of heat tubes. Heat transfer along a length of the heat tubes is facilitated by a heat conductive baffle substantially filling the interior of the heat tubes in volume and length. Heated air and gas are forced through the dense and elongated baffle to facilitate heat transfer to the walls of the heat tubes.

The invention relates to a heat-pipe type panel solar air collector and a heating method thereof. The collector comprises a solar panel heat collection and heat transmission section and an air ventilation heat exchange section. The solar panel heat collection and heat transmission section comprises tempered glass, an efficient heat absorption coating, a heat insulation air layer and a panel heat pipe evaporation section. The back of the efficient heat absorption coating and the obverse side of the panel heat pipe evaporation section are combined organically. The tempered glass covers the outer surface of the panel heat pipe evaporation section organically combined with the efficient heat absorption coating. The heat insulation air layer is arranged between the efficient heat absorption coating and the tempered glass, and the distance from the front of the efficient heat absorption coating to the inner surface of the tempered glass ranges from 20 mm to 50 mm. The air ventilation heat exchange section comprises an air duct, a fan and a panel heat pipe condensation section. The panel heat pipe condensation section is arranged in the air duct, and the fan is arranged on one side of the air duct. The collector has the advantages of being high in heat exchange efficiency, high in reliability, simple in structure, convenient to mount, free of maintenance and long in service life.

A prismatic sealed rechargeable battery includes a substantially prismatic battery case that accommodates an electrode plate assembly and an electrolyte solution. The battery case is formed of metal. On a side face of the battery case, a thin plate is provided which has a plurality of protruding portions formed in parallel at appropriate intervals. The protruding portion and the side face form spaces opened at both ends therebetween. The thin plate is bonded to the side face of the battery case by making flat portions between the protruding portions into surface-contact with the side face, thereby improving cooling capability of the battery.

A fuel gas-steam reformer assembly, preferably an autothermal reformer assembly, for use in a fuel cell power plant, includes a catalyst bed which is formed from a cylindrical monolithic open cell foam body. The foam body is preferably formed from a high temperature material such as stainless steel, nickel alloys and iron-aluminum alloys, or from a ceramic material. The foam body includes open cells or pores which are contained within the metal or ceramic lattice. The lattice is coated with a porous wash coat which serves as a high surface area substrate onto which catalysts used in the reformer are applied. The foam body has an inlet end into which a mixture of fuel, steam and air is fed to begin the reforming process. An inlet portion of the foam body may be provided with an iron oxide and/or noble metal catalyst and the remainder of the foam body may be provided with a nickel and/or noble metal catalyst. An advantage of including an autothermal reformer in a fuel processing system is the compactness of the autothermal reformer. The inclusion of the foam catalyst bed rather than the traditional catalyzed pellet bed allows the reformer to be made even more compact and light weight.

The invention discloses a fin evaporator applied to a refrigerator, a manufacturing method and the refrigerator with the fin evaporator. The fin evaporator applied to the refrigerator comprises a plurality of evaporating pipes, multiple groups of fins and multiple U-shaped connecting pipes, wherein the evaporating pipes are respectively U-shaped and mutually and vertically arranged at intervals; the fins are horizontally arranged side by side, the evaporating pipes penetrate the fins sequentially, each group of fins comprise a plurality of sub-fins arranged side by side, and the lengths of every two adjacent sub-fins are unequal; and the evaporating pipes are sequentially connected through the connecting pipes. According to the fin evaporator provided by the invention, as the plurality of U-shaped evaporating pipes are adopted and penetrate the multiple groups of the fins, the matching of the fins and pipelines of the U-shaped evaporating pipes are more tight, so that the heat exchange effect of the fin evaporator is improved; and as the sub-fins in different lengths are arranged, the heat exchange superficial area of the fin evaporator is increased, so that the heat exchange efficiency of the fin evaporator is effectively improved.

The invention discloses a boiler water-cooled wall inner threaded pipe with stream-line-section inner ribs. The boiler water-cooled wall inner threaded pipe comprises a pipe body and the ribs spirally arranged on the inner wall of the pipe body in the axial direction, wherein the cross sections of the ribs are in streamline shapes. The ribs which are spirally arranged are distributed at equal intervals, and the number of the ribs is 4 to 8. The included angle between the spiral direction of the ribs and a cross section is controlled within the range of 30 degrees to 60 degrees. The circumferential bottom width of the ribs of the boiler water-cooled wall inner threaded pipe is controlled within the range of 4 mm to 10 mm. The height of the highest point of the ribs of the boiler water-cooled wall inner threaded pipe is controlled within the range of 0.5 mm to 1.5 mm. The position of the highest point of the ribs is at the position of one third of the rib bottom width. By means of the novel boiler water-cooled wall inner threaded pipe, vortexes on the back flow sides of the ribs are avoided or reduced through the streamline inner ribs, so that the heat transfer capability of the inner wall face of the pipe is effectively improved, and the temperature level near rib roots on the back flow sides of the ribs is lowered. Therefore, the heat transfer performance of the boiler water-cooled wall inner threaded pipe can be further enhanced through the pipe shape.

The invention provides a compact type gas-gas heat exchange tube which comprises a heat transfer tube, an inner fin set and an outer fin set. The heat transfer tube is used for separating fluid insideand outside the tube and transferring heat between the fluid inside and outside the tube in a convection heat conduction mode; the inner fin set is used for expanding the inside heat exchange surfaceof the heat transfer tube, forming miniature fluid channels, separating the fluid in the tube, making the fluid flow in the axial direction of the heat transfer tube and meanwhile generating a turbulent flow effect and enhancing a convection heat exchange effect; the outer fin set is used for expanding the outside heat exchange surface of the heat transfer tube, forming miniature fluid channels,restraining the fluid outside the tube to reversely flow in the axial direction of the heat transfer tube and meanwhile generating the turbulent flow effect and enhancing the convection heat exchangeeffect; and holes are formed in fins of the inner fin set or/and the outer fin set. The invention further provides manufacturing and use methods of the compact type gas-gas heat exchange tube. Complete reverse flow efficient heat transfer is achieved under the heat exchange working condition of the limited space and the small tube number average temperature difference, the equipment spatial size is reduced, and meanwhile the weight of each area is reduced, so that the total weight and the manufacturing cost are reduced.

An electric drive motor with an improved liquid cooling system featuring a hollow rotor shaft configured to allow liquid coolant to flow in and out of the rotor shaft through an aperture in one distal end following a path influenced by a coolant tube such that the liquid coolant is directed to flow past a plurality of internally located heat dissipation fins which are in thermal communication with the rotor shaft thereby increasing the heat dissipation, performance, and power density.

A sealed rechargeable battery includes: a metal case having an elliptical or rectangular cross section; a metal sealing plate for sealing an opening at one end of the case; and an electrode plate assembly being housed in the case with an electrolyte solution. In this configuration, a plurality of projecting ridges are formed in a continuous or discontinuous manner on both longer side faces of the case between a bottom face and the opening so as to enhance the cooling performance and to improve the strength of the side faces of the case.

The invention relates to the technical field of heat exchange copper tubes and particularly discloses a heat exchange copper tube provided with straight internal threads. The heat exchange copper tube provided with the straight internal threads comprises a copper tube body. A plurality of right-angled teeth are arranged on the inner side of the copper tube body in the circumferential direction. The two side edges of each right-angled tooth are a supporting straight edge and an expanding bevel edge intersecting with the supporting straight edge, wherein the extension line of the supporting straight edge passes through the center of the circle of the copper tube, the supporting straight edge is connected with the expanding bevel edge in a circular arc transmission on the top of the right-angled tooth. The addendum angle of each right-angled tooth is 45 degrees. The right-angled teeth are stretched along the axis of the copper tube to form straight racks. A straight tooth groove is formed between every two adjacent straight racks. A spiral guide groove penetrating the straight racks is formed in the copper tube body. The spiral guide groove extends from one end of the copper tube body to the other end of the copper tube body. A turbulence tooth group is further arranged on the inner side of the copper tube body, and the turbulence tooth group and the spiral guide groove extend in a double-helix shape. The turbulence tooth group comprises a plurality of turbulence tooth teeth located in the straight tooth grooves. By the adoption of the heat exchange copper tube provided with the straight internal threads, tooth patterns can be prevented from being damaged in the tube expanding process, the flowing resistance is reduced, the flowing turbulence degree is increased, the heat exchange efficiency is improved, and the heat exchange copper tube provided with the straight internal threads is convenient to machine.

The invention relates to the technical field of cookware, and particularly relates to cookware for an electromagnetic oven as well as a dedicated fixture and a producing process thereof. The cookware comprises an aluminum pot body and an iron bottom plate which are cast into a whole, as well as at least one bolt, wherein a plurality of hooks are arranged on the iron bottom plate, and are embedded into the bottom of the aluminum pot body; a plurality of strip holes are formed on the iron bottom plate; strip ribs formed when aluminum materials are filled into the strip holes are arranged at the bottom of the aluminum pot body; and the nut of the bolt is embedded to the bottom of the aluminum pot body, while the screw part is positioned in a positioning hole formed on the iron bottom plate. Compared with the conventional similar cookware, the cookware for the electromagnetic oven has a firmer structure, longer service life and a better heat conducting effect.