238results about "Heat exchange simulation" patented technology

Disclosed is a method for testing the performance of a heat pipe and an apparatus for conducting the performance test. The apparatus includes a heating device and a cooling device. Two ends of the heat pipe are thermally connected to the heating device and the cooling device, respectively. The heating device is applied to supply thermal energy to the heat pipe. When the quantity of thermal energy being transferred to the heat pipe reaches to a specified value, the temperatures at the two ends of the heat pipe are detected. If the temperature difference between the two ends is lower than a predetermined value, the heat pipe being tested is deemed as acceptable.

A heat exchanger door and heat exchanger core optimization method are provided. The door resides at an air inlet or outlet side of an electronics rack, and includes an air-to-coolant heat exchanger with a heat exchanger core. The core includes a first coolant channel coupled to a coolant inlet manifold downstream from a second coolant channel, and the first channel has a shorter channel length than the second channel. Further, coolant channels of the core are coupled to provide counter-flow cooling of an airflow passing across the core. The core optimization method determines at least one combination of parameters that optimize for a particular application at least two performance metrics of the heat exchanger. This method includes obtaining performance metrics for boundary condition(s) of possible heat exchanger configurations with different variable parameters to determine a combination of parameters that optimize the performance metrics for the heat exchanger.

A method and battery system for thermal management of a battery system includes predicting a total heat generation by a battery based on determined internal conditions of the battery, and controlling a selective adjusting of a heat transfer coefficient for the battery based on the predicted total heat generation to maintain an operating temperature of the battery at a target temperature or within a target temperature range.

A method for measuring the effects of fouling of heat transfer tubes in heat exchangers where a cooling fluid at lower temperature is removing heat from another fluid at higher temperature includes placing a nonrestrictive mass flow rate and temperature measuring tube extension sensor on a tube outlet end; obtaining the tube inlet temperature for deriving the rise in fluid temperature; analytically computing the amount of heat transferred from the hot fluid to the cold fluid; from tube length, inside and outside tube diameter, analytically deriving the tube heat transfer coefficient; and determining tube fouling factor, the value of which is the fraction of the clean tube heat transfer coefficient available for transferring heat, by dividing the heat transfer coefficient by the known heat transfer coefficient of an unfouled tube.

A plate-type heat exchanger (10), especially a soldered aluminium plate heat exchanger has a heat exchanging portion (12) which comprises two or more first channels (14a) and two or more second channels (14b); first fluid can flow through the first channels and second fluid can flow through the second channels; in this way, the first fluid exchanges heat with the second fluid. For reducing the thermal stress inside the heat exchange portion (12), the heat exchange portion (12) comprises at least one no-fluid layer (30) disposed between the two fluid channels (14a, 14b).

A method for making a heat exchanger assembly is described, involving generating a digital model of a heat exchanger assembly that comprises a heat exchanger core within a housing. The digital model is inputted into an additive manufacturing apparatus or system comprising an energy source. The additive manufacturing apparatus applies energy from the energy source to successively applied incremental quantities of a metal powder, which fuses the powder to form incremental portions of the heat exchanger core and housing according to the digital model. Unfused or partially fused metal powder is enclosed in a first region of the heat exchanger assembly between the heat exchanger core and the housing.

A heat exchanger evaluation system (84) includes a refrigeration subsystem (126) and a platform (94) in communication with the subsystem (126) for attachment of a heat exchanger (32). The system, (84) further includes a thermal imaging camera (168) and a monitor (100). A method (180) entails routing a fluid (38) through the heat exchanger (32) via the refrigeration subsystem (126). The camera (168) detects the temperature variation across the heat exchanger (32) as the fluid (38) flows through the heat exchanger, and provides successive thermal images representing the temperature variation responsive to the flow of the fluid (38). The thermal images are utilized to determine an efficacy of the flow through the heat exchanger (32). In particular, a determination can be made as to whether the flow deviates from a pre-determined flow path (79) of the fluid (38) through the heat exchanger.

An apparatus and a process for testing fluid from a heat exchanger. A first fluid from a heat exchanger to be tested is passed through a test heat exchanger. A second fluid is circulated through the test heat exchanger with a pump. The second fluid is heated with a heater so that a temperature in the test heat exchanger can be controlled, for example, to so that conditions in the heat exchanger are close to the conditions in the heat exchanger. After a period of time, the test heat exchanger can be removed and inspected, tested, or both. Also, multiple test heat exchangers may be used to test various process conditions. Additionally, the test heat exchangers may include different materials to test various materials.

A heat exchanger that is constructed with a heat exchanger shell having inlet and outlet plenums and fluid inlet and outlet ports, and a tube sheet construction disposed in the heat exchanger shell. The tube sheet construction includes at least two separate tube sheets and a plurality of tubes that extend between the separate tube sheets. Each tube sheet includes at least two planar tube sheet segments and an interstitial layer disposed between the at least two tube sheet segments, and at least one sensor element supported by each of the interstitial layers. A control monitor controls flow through the shell by a feedback control from the sensor to an inlet control valve and/or a stimulus device excites the media layer.

The invention discloses a thermotube performance detecting device comprising a heating component, a radiating component and a bearing part. The heating component and the radiating component respectively comprise a fixed part and a movable part which can be separable and inseparable from each other; at least one measuring and accommodating part capable of accommodating a thermotube to be measured is arranged between the opposite surfaces of the heating component and the radiating component; the measuring and accommodating part is internally provided with at least one temperature sensor; the heating component is provided with at least one heating element for heating the evaporating section of the thermotube to be measured; the radiating component is provided with at least one cooling structure; the bearing part comprises one positioning seat and two clamping seats which are arranged on the positioning seat and bear the heating component and the radiating component respectively, wherein at least one clamping seat adjusts the relative angel of the measuring and accommodating part arranged between the heating component and the radiating component with respect to the preset rotation angle of the positioning seat so as to bend thermotubes to be measured differently.

A performance testing apparatus for heat pipes includes a heating set, a cooling set, and a supporting set adjustably supporting the heating and cooling sets thereon. The heating set includes a first immovable portion, a first movable portion and two heating channels therebetween. Temperature sensors are inserted into the first immovable portion and movable portions. Heating members are inserted into the first movable portion and immovable portions. The cooling set includes a second immovable portion, a second movable portion and two cooling channels defined therebetween. Temperature sensors are inserted into the second immovable and movable portions. A cooling passageway is formed in the second immovable portion.

A measuring device for a heat pipe (40) includes a first platform (100), a second platform (100), a heating member (200), a cooling member (210) and thermal probes (300). The heat pipe (40) includes a first end (42) and a second end (44) opposite to the first end (42). The first platform (100) flexibly receives the first end (42) of the heat pipe (40) therein and the second platform (100) flexibly receives the second end (44) of the heat pipe (40) therein. The heating member (200) is for heating the first end (42) of the heat pipe (40) and the cooling member (210) is for cooling the second end (44) of the heat pipe (40). The thermal probes (300) are received into the first platform (100) and the second platform (100) to measure the temperatures where they are positioned.

An airflow sensor for a heat sink has a first portion having a first electrical point of contact, a second portion have a second electrical point of contact, and a deformable portion made of an electroactive material electrically coupled to the first and second portions. The deformable portion has first electrical properties measured between the first and second electrical points of contact when there is no airflow and the deformable portion is in a first position, and has second electrical properties different than the first electrical properties when a source of airflow blows air against the deformable portion, thereby causing the deformable portion to extend to a second position farther away from the source of airflow than the first position. The airflow sensor can be incorporated into a heat sink for an electronic component.

A performance testing apparatus for a heat pipe includes an immovable portion having a heating member located therein for heating an evaporating section of the heat pipe, and a movable portion capable of moving relative to the immovable portion. A receiving structure is defined between the immovable portion and the movable portion for receiving the evaporating section of the heat pipe therein. A positioning structure extends from the immovable portion and slideably receives the movable portion therein for avoiding the movable portion from deviating from the immovable portion during movement of the movable portion relative the immovable portion. Temperature sensors are attached to the immovable portion and the movable portion for detecting temperature of the heat pipe.

A heat exchanger core optimization method is provided for a heat exchanger door which resides at an air inlet or outlet side of an electronics rack, and includes an air-to-coolant heat exchanger with a heat exchanger core. The core includes a first coolant channel coupled to a coolant inlet manifold downstream from a second coolant channel, and the first channel has a shorter channel length than the second channel. Further, coolant channels of the core are coupled to provide counter-flow cooling of an airflow passing across the core. The core optimization method determines at least one combination of parameters that optimize for a particular application at least two performance metrics of the heat exchanger. This method includes obtaining performance metrics for boundary condition(s) of possible heat exchanger configurations with different variable parameters to determine a combination of parameters that optimize the performance metrics for the heat exchanger.

A performance testing apparatus for a heat pipe includes an immovable portion having a cooling structure defined therein for cooling a heat pipe requiring to be tested. A movable portion is capable of moving relative to the immovable portion and has a cooling structure therein for cooling the heat pipe. A receiving structure is located between the immovable portion and the movable portion for receiving the heat pipe therein. At least one temperature sensor is attached to at least one of the immovable portion and the movable portion. The least one temperature sensor has a detecting section exposed in the receiving structure for thermally contacting the heat pipe in the receiving structure to detect a temperature of the heat pipe.

A method for monitoring the efficiency of a heat exchanger is provided. Heat flows from a first medium into a second medium and an actual heat flow is detected and compared with at least one reference heat flow corresponding to a respectively predetermined degree of soiling of the heat exchanger. Furthermore, a device for controlling a plant having at least one heat exchanger is described. The plant has a storage device storing at least one reference heat flow of the heat exchanger.

A header box for a heat exchanger assembly and the method of manufacture. The header box has a first header component and a second header component. The first header component has a first corner portion with a first wall and a second wall extending therefrom. The second header component has a second corner portion with a third wall and a fourth wall extending therefrom. Free ends of the first wall and the third wall cooperate to form a first seam which is welded to maintain the first wall in position relative to the second wall. The free ends of the second wall and the fourth wall cooperate to form a second seam which is welded to maintain the third wall in position relative to the fourth wall. The header box, with the first corner portion and the second corner portion, will withstand the stress concentrations associated with a flow of fluid in the header box.

The invention provides a heat pipe type insulation sleeve pipe test device, which comprises an oil tank, a temperature detection device, an insulation sleeve, a first conduction rod, a voltage generator, a step-down transformer and a second conduction rod, wherein the oil tank is provided with a first connecting hole and a second connecting hole; a heat pipe type insulation sleeve pipe to be tested is arranged in a penetrating way and is connected with the first connecting hole; the insulation sleeve pipe is arranged in the penetrating way and is connected with the second connecting hole; the first end of the heat pipe type insulation sleeve pipe and the first end of the insulation sleeve pipe are connected with each other in the oil tank through the first conduction rod; the second end of the heat pipe type insulation sleeve pipe and the second end of the insulation sleeve pipe are connected with each other outside the oil tank through the second conduction rod; the heat pipe type insulation sleeve pipe, the insulation sleeve pipe, the first conduction rod and the second conduction rod form a closed loop; the step-down transformer is arranged outside the heat pipe type insulation sleeve in a sleeving way; the voltage generator is connected with the heat pipe type insulation sleeve pipe; the temperature detection device is arranged in the heat pipe type insulation sleeve pipe. The heat pipe type insulation sleeve pipe test device has the advantages that the performance test of the heat pipe type insulation sleeve pipe is realized; the safety and the reliability are improved.