2928 results about "Plate fin heat exchanger" patented technology

A temperature climate control system comprises a variable temperature seat, at least one heat pump, at least one heat pump temperature sensor, and a controller. Each heat pump comprises a number of Peltier thermoelectric modules for temperature conditioning the air in a main heat exchanger and a main exchanger fan for passing the conditioned air from the main exchanger to the variable temperature seat. The Peltier modules and each main fan may be manually adjusted via a temperature switch and a fan switch, respectively. Additionally, the temperature climate control system may comprise a number of additional temperature sensors to monitor the temperature of the ambient air surrounding the occupant as well as the temperature of the conditioned air directed to the occupant. The controller is configured to automatically regulate the operation of the Peltier modules and/or each main fan according to a temperature climate control algorithm designed both to maximize occupant comfort during normal operation, and minimize possible equipment damage, occupant discomfort, or occupant injury in the event of a heat pump malfunction.

The invention relates to a central heating system with large temperature difference, which belongs to the energy field. The system comprises a steam turbine, a condenser, a steam absorption heat pump, a steam-water heat exchanger, a hot water absorption heat pump, a water-water heat exchanger as well as a connecting pipe and accessories. The invention is characterized in that the temperature difference of the heat net supply is large, and is about one time higher than the conventional heat net operation, thus the transmission capacity of the heat net is greatly increased, and at the same time, no heat preservation and thermal stress compensation problems exist as the backwater temperature of the heating is low, thereby reducing the investment of the backwater pipeline network and the whole pipeline network; the steam turbine is utilized to discharge steam and preheat the backwater of the large heat net, and circulating cooling water is utilized to be taken as the low level heat energy of the absorption heat pumps. The invention has the advantages that the residual heat produced in the electricity generating process of a power plant is recycled to the greatest extent as much as possible, the combination mode of the hot water absorption heat pump and the water-water heat exchanger is adopted at the end to heat the hot water of the secondary heat net supply, and the temperature difference of the supply-water and the backwater of the large heat net are increased, at the same time, the heat net does not need external energy to be the driving force.

A heat exchanger, in particular for cooling the exhaust of a motor vehicle internal combustion engine, is disclosed, the heat exchanger comprising a first partial heat exchanger with at least one first flow channel through which a medium to be cooled is to flow and at least one third flow channel through which a first coolant is to flow, at least one second partial heat exchanger with at least one second flow channel through which a medium to be cooled is to flow and at least one fourth flow channel through which a second coolant is to flow, wherein the at least one first flow channel and the at least one second flow channel are fluidly connected, and the at least one first flow channel and the at least one second flow channel have at least one first specific heat transfer surface and at least one second heat transfer surface, wherein second specific heat transfer surface area, divided by first specific heat transfer surface area, yields a quotient (ψ), the at least one first flow channel having a larger quotient (ψ) than second flow channel.

A novel plate fin heat exchanger adapted for high and low velocity fluid flows for dissipating heat from a heat generating component. The heat exchanger comprises an array of fins being affixed to and in thermal communication with a thermally conductive base, wherein the fins are arranged in a fan tail configuration for minimizing flow bypass, and further providing reduced thermal resistance for fluid passing through the fin field. The fins are affixed to and in thermal communication with the base at an acute angle, such that the effective width of the array of fins exceeds the width of the base. The enlarged effective width of the fin array in comparison to conventional heat exchanger provides an increased volume for fluid flow, thereby allowing a greater volume of fluid to enter the fin field and a greater surface area of plate fins for cooling the fluid passing through the heat exchanger. In addition, the heat exchanger comprises a fin density of at least ten fins per inch or greater of base length thereby providing a narrow channel heat exchanger with a fan tail. The aspect ratio of the individual channels between the fins, as compared to parallel fins affixed perpendicular to the base through an extrusion method, generates a reduced pressure drop across the heat exchanger. Accordingly, the heat exchanger of the present invention expands the envelope of cooling performance provided by fluid flow over an array of thermally conductive plates.

Waste heat energy conversion cycles, systems and devices use multiple waste heat exchangers arranged in series in a waste heat stream, and multiple thermodynamic cycles run in parallel with the waste heat exchangers in order to maximize thermal energy extraction from the waste heat stream by a working fluid. The parallel cycles operate in different temperature ranges with a lower temperature work output used to drive a working fluid pump. A working fluid mass management system is integrated into or connected to the cycles.

A plate heat exchanger includes a plurality of plates sandwiched between a pair of end plates. Each of the plurality of plates has two passageways defined therein that are not in fluid communication with each other. Alternatively, some of the plurality of plates have a passageway, while some of the remaining plates have another passageway. Two fluids flow through the two passageways in a countercurrent fashion. Because the countercurrent flows are superior in heat transfer efficiency, it is possible to enhance the performance and reduce the size of the plate heat exchangers.

In a vehicle air conditioning system, a cold accumulator is disposed between a downstream air side of a cooling heat exchanger and an upstream air side of a heating heat exchanger to be cooled by cold air having passed through the cooling heat exchanger. Further, the cold accumulator is disposed at the upstream air side of an air mixing door.

A plate-type heat exchanger having a first heat exchanger portion configured to receive a refrigerant flow and a hot side coolant flow having a lower temperature than the refrigerant flow, a second heat exchanger portion configured to receive the refrigerant flow exiting from the first heat exchanger portion and a cold side coolant flow having a higher temperature than the refrigerant flow exiting from the first heat exchanger portion, and an internal heat exchanger portion sandwiched between the first heat exchanger portion and the second heat exchanger portion. The refrigerant flow through the plate type heat exchanger is in non-contact thermal communication with the hot side coolant flow and the cold side coolant flow. The cold side coolant flow transfers heat energy to the refrigerant, which in turn transfer that heat energy to the hot side coolant flow.

An enclosure has a set of panels forming an outer peripheral skin. A heat exchanger wall is placed within the panels. A first fan arrangement circulates ambient air into a space within the panels and along the exterior surface of the heat exchanger wall and back into the environment. A second fan arrangement circulates air contained within the enclosure against the interior surface of the heat exchanger wall. Heat is transferred through the heat exchanger wall to the ambient air circulated by the first fan. An inner wall is placed adjacent to the interior surface of the heat exchanger wall. The space between the inner wall and the heat exchanger wall forms a space for the air within the interior of the enclosure to circulate by the second fan. The heat exchanger wall provides a barrier isolating the ambient air from the air within the enclosure, preventing dust, humidity and pollutants to enter into the interior of the cabinet in the space surrounding the electronic components.

The invention relates to a flue gas total-heat recovery device of a gas boiler, belonging to the thermotechnical field. In the invention, the temperature of the flue gas exhausted by the gas boiler can be reduced to lower than 40 DEG C by a gas-water heat exchanger and a mixing cooler, then the cooled flue gas is directly supplied for an air-source heat pump water heater for generating the hot water, and the sensible heat and the latent heat in the flue gas can be totally recovered. Most CO2 and NOx in the flue gas can be absorbed by condensed water in the cooling process, thereby reducing the emission of harmful gas. The device comprises the gas-water heat exchanger, the mixing cooler and the heat pump water heater and is characterized in that the flue gas at 150-200 DEG C is cooled to lower than 90 DEG C by the gas-water heat exchanger and then can be cooled to lower than 40 DEG C in the mixing cooler, and the cooled flue gas can serve as heat source to directly enter an evaporator of the air-source heat pump water heater for heat exchange. The invention solves the problems of frosting and low efficiency of the air-source heat pump water heater due to low temperature in winter in the North while recovering the residual heat of the flue gas of the gas boiler at the same time; meanwhile, the emission of the harmful gas in the flue gas of the gas boiler can be reduced, thereby realizing energy saving and emission reduction.

A reinforcing element for a heat exchanger of the type having nested dish plates with inclined, peripheral, overlapping walls, where at least one of the nested dish plates is attached to a mounting plate, the mounting plate extending beyond the outer periphery of the walls of the nested dish plates. The reinforcing element has a base flange attached to the mounting plate extending beyond the outer periphery of the walls of the nested dish plates. The reinforcing element also has a peripheral flange located in parallel, overlapping engagement with the inclined peripheral wall of the at least one dish plate attached to the mounting plate.

The present invention relates to optimized designs of heat exchangers, and, in particular, heat exchangers and assemblies comprising multi-exchangers or combo coolers comprising different heat exchanger parts or elements, and fins or separators of different types and/or characteristics on the different tube parts of the heat exchanger results. The two part heat exchanger is capable of being traversed by different fluids, and fins differ in characteristics, such as height and pitch, to increase overall heat exchanger efficiency.

The invention provides a triangular convex-stab-shaped plate-fine heat exchanger used for condensation of a non-azeotropic multi-component mixture. The plate-fin heat exchanger comprises parallel plates; fins are arranged between the plates; the fins comprise inclined parts inclining towards the plates; convex stabs are machined on the inclined parts in a stamping mode, so that fluid on the two sides of the inclined part circulates through holes formed in the inclined parts in a stamping mode, and the convex stabs extend outwards in the flowing direction of the mixture from the inclined parts. The novel triangular convex-stab-shaped plate-fine heat exchanger is suitable for being used in condensation of the non-azeotropic multi-component mixture, so that condensation of the non-azeotropic multi-component mixed medium is achieved, the heat exchange efficiency is improved, and the fluid flowing resistance is reduced.

The process of producing aluminum plate-fin heat exchanger includes the steps of blanking, washing, mounting, brazing, argon arc welding and pressure test. The present invention adopts numerically controlled lathe with high machining precision for blanking; ultrasonic washing for high washing efficiency and high washing quality; continuous high purity nitrogen protected brazing for high brazing quality; and argon arc welding with welding robot for high welding quality and high production efficiency.

The invention relates to a method for brazing a compact efficient titanium alloy plate-fin heat exchanger, which adopts an amorphous titanium based brazing filler metal brazing titanium alloy with lower melting point which is between 820 and 840 DEG C, wherein the optimum clearance of the amorphous titanium based brazing filler metal brazing titanium alloy is between 20 and 90 microns, the optimum brazing temperature is between 850 and 900 DEG C, the optimum brazing time is between 10 and 15 minutes, the heating rate before soaking a workpiece is between 10 and 15 DEG C per minute, the heating rate for brazing after the soaking is 15 DEG C per minute, the cooling rate for the brazing filler metal to become solid from liquid is not less than 15 DEG C per minute, and a vacuum system only can be closed when the temperature is below 150 DEG C. Through strict selection and purchase of materials, precise part machining, careful part cleaning, brazing filler metal arrangement according to a process, precise assembling and clamping, and performing brazing according to a stated brazing process, a helium gas leakage test shows that the integral leakage of the product is 9*10<-8>PaM<3>/S which is in accordance with the standard requirement.

The invention refers to a plate heat exchanger where the heat exchanger comprises a first flow channel between a first plate and a second plate, and where the flow channel comprises a first distribution passage, a heat transfer passage and a second distribution passage, where the heat transfer passage is vertically divided in a lower and an upper heat transfer passage and where the lower heat transfer passage is horizontally divided in a plurality of adjacent heat transfer zones, where the intermediate angle between the ridges and grooves in any of the heat transfer zones of the lower heat transfer passage is at least 30° larger than the intermediate angle of the upper heat transfer passage. The advantage of the invention is that an improved heat exchanger is provided, having an increased thermal performance and an improved evaporation capacity.