Thermal Conductivity Patents (Class 374/44)
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Patent number: 9082645Abstract: Parts of electronic components are not exposed to temperature deviating from an appropriate operation temperature range when an electric characteristic test of a semiconductor module having an interposer substrate over which plural kinds of electronic components are mounted is carried out. A heat sink for an electronic component is incorporated in a lid of a test socket used for an electric characteristic test of an MCM. A heat dissipation sheet is attached to part of the bottom face of the heat sink and an adiabatic sheet is attached to another part. The heat dissipation sheet has thermal conductivity larger than the adiabatic sheet and transfers heat generated from an electronic component of a high heat value to the heat sink during operation. The adiabatic sheet inhibits the heat generated from an electronic component of high heat value from being transferred to another electronic component through the heat sink.Type: GrantFiled: February 15, 2013Date of Patent: July 14, 2015Assignee: RENESAS ELECTRONICS CORPORATIONInventor: Tatsuya Takizawa
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Patent number: 9068894Abstract: A temperature emulator may include a stack assembly having a pair of end plates positioned at an uppermost and lowermost location of the stack assembly, a plurality of heat sink plates disposed between the pair of end plates, each of the heat sink plates having a plurality of heat sink cutouts, a plurality of shim plates separating adjacent pairs of the end plates and the heat sink plates, each of the shim plates having a shim cutout, an open cavity formed by a plurality of adjacent heat sink cutouts and shim cutouts, thermal insulation disposed within the cavity, and at least one temperature sensor coupled to at least one of the plurality of heat sink plates.Type: GrantFiled: November 26, 2012Date of Patent: June 30, 2015Assignee: The Boeing CompanyInventor: Karl M. Nelson
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Patent number: 9028138Abstract: An electronic device includes a heat source, a heat-absorbing cold point, a thermally insulating material for insulating the heat source from the cold point with a conductivity at a use-temperature of electronic device, that is below a thermal-conductivity threshold, and a thermal bridge having first and second ends connected by pads to the heat source and the cold point, and a thermal switch. The thermal bridge extends between the two ends and switches reversibly between conductive and non-conductive states. It includes material of variable thermal conductivity capable of switching over, in response to an addition of energy, between a conductive phase and a resistive phase, and a control module for causing the thermal switch to switch between the conductive state and the resistive state.Type: GrantFiled: December 13, 2012Date of Patent: May 12, 2015Assignee: Commissariat á l'énergie atomique et aux énergies alternativesInventors: Haykel Ben Jamaa, Julien Buckley, Patrick Leduc
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Publication number: 20150127294Abstract: A sensing system uses three-omega sensing to determine a spatial profile of thermal property within a sample. The sensing system electrically powers a lossy electrical conductor at different driving frequencies. The different driving frequencies produce different penetration depths within the sample. The sensing system takes multiple measurements of thermal property at the different driving frequencies. Each measurement is associated with a different penetration depth, and therefore is averaged over a differently-sized volume within the sample. The sensing system performs a fit on the multiple measurements of material thermal property versus material geometry. If one of thermal property or geometry is known beforehand, then the fit can determine the other. The lossy electrical conductor can be formed on a polymeric flexible membrane, on a probe that can be placed at a suitable location in a patient's body, and/or directly onto a heating or cooling element.Type: ApplicationFiled: November 5, 2014Publication date: May 7, 2015Inventors: Sean D. Lubner, Jeunghwan Choi, Harishankar Natesan, Christopher E. Dames, John C. Bischof
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Publication number: 20150092812Abstract: Provided is an apparatus for measuring a thermoelectric device. The apparatus includes a high temperature heater controlling a temperature of a first side of a sample, a low temperature heater controlling a temperature of a second side of the sample, a fine control heater controlling the temperature of the first side of the sample by a smaller unit than the high temperature heater, a temperature control and voltage measuring unit controlling the high temperature heater, the low temperature heater, and the fine control heater and measuring voltages of the first and second sides of the sample, and a thermal conductivity measuring unit measuring thermal conductivity of the sample by using a high temperature output voltage generated in the first side of the sample and a low temperature output voltage generated in the second side of the sample.Type: ApplicationFiled: July 14, 2014Publication date: April 2, 2015Applicant: Electronics and Telecommunications Research InstituteInventors: Dong Suk JUN, Moon Gyu JANG, Won Chul CHOI
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Publication number: 20150091593Abstract: A multi-functional precious stone testing apparatus includes a portable housing, a testing unit, and an indication unit. The portable housing includes a hand-held casing and a probe casing extended from a front end of the hand-held casing. The testing unit includes a conductive probe having a testing end portion extended out of a tip end of the probe casing for contacting a testing object to determine a conductivity of the testing object. The indication unit includes a LED light unit received in the hand-held casing for illuminating the testing end portion of the conductive probe during testing, wherein the LED light unit is positioned away from the tip end of the probe casing for preventing heat generated from the LED light unit being transmitted toward the conductive probe to affect an accurate measurement for the conductivity of the testing object.Type: ApplicationFiled: December 8, 2014Publication date: April 2, 2015Inventors: Xiuling ZHU, Gary Bruce PECKHAM
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Patent number: 8992075Abstract: A sensor apparatus and sensor apparatus system for use in conjunction with a cassette, including a disposable or replaceable cassette. In some embodiments, the cassette includes a thermal well for permitting the sensing of various properties of a subject media. The thermal well includes a hollow housing of a thermally conductive material. In other embodiments, the cassette includes sensor leads for sensing of various properties of a subject media. The thermal well has an inner surface shaped so as to form a mating relationship with a sensing probe. The mating thermally couples the inner surface with a sensing probe. In some embodiments, the thermal well is located on a disposable portion and the sensing probe on a reusable portion.Type: GrantFiled: September 14, 2012Date of Patent: March 31, 2015Assignee: DEKA Products Limited PartnershipInventors: Dean Kamen, N. Christopher Perry, Jason A. Demers, Brian D. Tracey, Arun D. Chawan, Kevin L. Grant
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Publication number: 20150055676Abstract: Surface of a sample of a heterogeneous material and of samples with known thermal conductivity and thermal diffusivity is heated by a heating spot created by a heater and moving along the surfaces of all samples to determine thermal conductivity and thermal diffusivity of the heterogeneous material. Temperatures of heated surface of all samples are registered by three temperature sensors. Return of the heater and the sensors to the initial position is used for scanning with additional measurements of the sample thermal conductivity for a layer of the sample with depth and width different from those of a layer where thermal conductivity is measured during the forward direction.Type: ApplicationFiled: August 22, 2014Publication date: February 26, 2015Inventors: YURY POPOV, EVGENY POPOV, ANTON PARSHIN
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Publication number: 20150049784Abstract: A porous sample is alternately saturated with at least two saturating fluids with known different thermal conductivities. As at least one saturating fluid a mixture of at least two fluids is used with known and different thermal conductivities. After each saturation thermal conductivity of the saturated sample is measured, and pore space characteristics and matrix thermal conductivity are determined based on the results of thermal conductivity measurements.Type: ApplicationFiled: April 12, 2013Publication date: February 19, 2015Inventors: Yury Anatolievich Popov, Irina Bayuk, Anton Vladimirovich Parshin
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Patent number: 8947111Abstract: A multi-functional precious stone testing apparatus includes a portable housing, a testing unit, and an indication unit. The portable housing includes a hand-held casing and a probe casing extended from a front end of the hand-held casing. The testing unit includes a conductive probe having a testing end portion extended out of a tip end of the probe casing for contacting a testing object to determine a conductivity of the testing object. The indication unit includes a LED light unit received in the hand-held casing for illuminating the testing end portion of the conductive probe during testing, wherein the LED light unit is positioned away from the tip end of the probe casing for preventing heat generated from the LED light unit being transmitted toward the conductive probe to affect an accurate measurement for the conductivity of the testing object.Type: GrantFiled: February 16, 2011Date of Patent: February 3, 2015Assignee: Shenzhen DiKai Industrial Co., Ltd.Inventors: Xiuling Zhu, Gary Bruce Peckham
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Patent number: 8939012Abstract: The present invention provides a thermal conductivity detector capable of realizing high detection performance even with the use of a miniaturized heating element, and expanding an effective applicable temperature range of a heating element, and to provide a gas chromatograph using the same. The thermal conductivity detector comprises a flow-path through which a measurement gas is caused to flow, a heating element disposed inside the flow-path, the heating element being formed on the substrate, for detecting thermal conductivity of the measurement gas according to magnitude of an amount of heat taken away from the heating element by the measurement gas, wherein said heating element is provided with a beam including a part where the beam is folded at a predetermined angle, the part being formed at the central part of the beam.Type: GrantFiled: August 17, 2011Date of Patent: January 27, 2015Assignee: Yokogawa Electric CorporationInventors: Naoki Kishi, Hitoshi Hara, Tetsuya Watanabe, Kentaro Suzuki
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Publication number: 20150003492Abstract: A temperature of a semiconductor element is measured based on a temperature coefficient of a voltage between the first electrode and the second electrode when no heat is generated when causing a constant current of an extent such that the semiconductor element does not generate heat to be input wherein current is caused to flow from a third electrode to a second electrode in accordance with voltage applied between a first electrode and the second electrode. Also, a constant current such that the semiconductor element generates heat is input into the third electrode, with voltage applied between the first electrode and second electrode of the semiconductor element kept constant, and power is measured based on the current such that the semiconductor element generates heat and on voltage when heat is generated between the third electrode and second electrode when the semiconductor element generates heat.Type: ApplicationFiled: June 11, 2014Publication date: January 1, 2015Inventors: Toshiyuki MIYANAGI, Yuichiro HINATA
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Publication number: 20140369379Abstract: A method and apparatus for monitoring during dynamic processes that determines when effective measurements of thermal effusivity and/or thermal conductivity can be made during a portion of a cycle during a calibration phase, then measures thermal effusivity and/or thermal conductivity during a subsequent dynamic process in dependence upon the time delay value and the measurement duration value until a desired value is obtained. A sensor having a measurement period of between one to two seconds allows monitoring of materials during dynamic processes such as tumbling, blending, mixing, and rocking. For example, measurements can be made until a value indicative of a desired mixture condition is obtained.Type: ApplicationFiled: September 2, 2014Publication date: December 18, 2014Inventors: Michael Emanuel, Chongde Zhao, Biao Yu, Dimitri Vinnik, Chris Rendell
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Publication number: 20140369378Abstract: A method and an apparatus for testing thermal performance of a coating layer are provided. The method for testing thermal performance of a coating layer involves obtaining a first thermal gradient by exposing one side of a metal base test piece to heat and exposing another side of the metal base test piece to a cooling air; obtaining a second thermal gradient by exposing a coating layer side of a coating layer test piece to heat and exposing an opposite side to a cooling air; calculating an exterior temperature Tf of a coating layer of the coating layer test piece and a temperature Te of a boundary side of the coating layer using the first thermal gradient; and calculating a temperature difference T? between the exterior temperature Tf of the coating layer and the temperature Te of the boundary side of the coating layer.Type: ApplicationFiled: July 22, 2014Publication date: December 18, 2014Applicant: Research & Business Foundation SUNGKYUNKWAN UNIVERSITYInventors: Changsung SEOK, Yongseok KIM
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Publication number: 20140361092Abstract: A card control unit for controlling a line card includes a detecting section, a collecting section, and an estimating section. The detecting section detects mounting of a module into a mounting port in the communication card equipped with multiple cages that each have a mounting port into which a module is removably mounted. When mounting of a module has been detected, the collecting section collects an environmental temperature around a mounting port into which the module has been mounted, a power consumption and specified temperature of the module, and thermal resistance information of a cage mounted with the module. The estimating section estimates an environmental temperature after activation of the module on the basis of the collected environmental temperature, power consumption, specified temperature, and thermal resistance information before the module of which the mounting has been detected is activated.Type: ApplicationFiled: May 20, 2014Publication date: December 11, 2014Applicant: FUJITSU LIMITEDInventor: Hiroshi Iizuka
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Publication number: 20140355645Abstract: A method and an apparatus for measuring sedimentation of a solid-liquid two-phase mixture are provided. A standard work curve and/or standard mathematical model, indicating a relationship between thermal conductivity (k) and concentration (?) (and/or density (?)), are provided for measuring sedimentation of the solid-liquid two-phase mixture. To measure the sediment, thermal conductivities (k) are measured at settling times (t) to obtain a relationship (k?t). Concentrations (?) and/or densities (?) are then determined, based on the measured relationship (k?t) and the standard work curve and/or the standard mathematical model. A sedimentation rate is determined according to a variation rate of the thermal conductivity. A sedimentation status, sedimentation degree, and/or complete sedimentation degree are determined according to variation rate and variation degree of the thermal conductivity (k), the concentration (?) and/or the density (?) of the solid-liquid two-phase mixture to be measured.Type: ApplicationFiled: May 9, 2014Publication date: December 4, 2014Applicant: Wuhan University of TechnologyInventors: HAIBIN CHENG, CHAOSHENG LIU, QINGJIE ZHANG, WENTAO MA, YAWEN DAI
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Publication number: 20140338439Abstract: A measurement device is configured in a shaped charge package to be utilized in a perforating gun section tool string. The measurement device may include for example thermal conductivity detectors (TCD) configured to measure fluid flow velocity and/or thermal characteristics of the flowing fluid. The measurement device may include for example a pair laterally spaced TCDs each having sensor faces positioned co-planar with a surface across which the fluid flows. The measurement device may include a recessed TCD, having a sensor face recessed below an opening in the exterior surface.Type: ApplicationFiled: May 16, 2014Publication date: November 20, 2014Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Patrice Ligneul, Bertrand Theuveny, Tullio Moscato, Sebastien Prangere, Olivier Peyret
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Publication number: 20140334516Abstract: A rotatable temperature sensing device. In one example, a temperature sensing device includes a first end. The temperature sensing device also includes a second end. The temperature sensing device includes a shaft coupling the first end and the second end. The shaft is configured to rotate the first and second ends together during operation. The temperature sensing device also includes a temperature sensor disposed in the first end and configured to communicatively connect to an external device, wherein the temperature sensor is configured to provide an indication of a temperature of the workpiece.Type: ApplicationFiled: April 22, 2014Publication date: November 13, 2014Applicant: Illinois Tool Works Inc.Inventors: Paul David Verhagen, Jyi-Jiin Luo, Michael C. Dill
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Publication number: 20140337035Abstract: A gem tester for testing a gem under test and a kit including a horizontal recharging stand are disclosed. In one embodiment of the gem tester, an elongated body has a line-of-sight contour tapering from a bulbous end to a radially deviating frontal nose having a probe extending therefrom. Internal circuitry measures electrical conductivity of the gem under test in order to identify the type of gem under test and drive a color control signal in response thereto. A light source is disposed proximate the probe in order to expose the gem under test to ultraviolet light prior to the internal circuitry measuring electrical conductivity. Identification of the gem under test may be made by audio or visual indication or a combination thereof.Type: ApplicationFiled: July 23, 2014Publication date: November 13, 2014Inventors: Daniel L. Kessler, Henry M. Kessler
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Publication number: 20140334517Abstract: A temperature sensor belt includes at least one temperature sensor. The at least one temperature sensor is configured to provide an indication representative of a temperature of a workpiece. The temperature sensor belt also includes a support material disposed over the at least one temperature sensor. The support material is configured to support the at least one temperature sensor on the sensor belt. The temperature sensor belt also includes an insulative material at least partially surrounding the at least one temperature sensor. The insulative material is configured to thermally insulate the at least one temperature sensor.Type: ApplicationFiled: April 22, 2014Publication date: November 13, 2014Inventors: Jack Robert Blundell, Paul David Verhagen, Adolph G. Galinski, Anders Olof Rostlund, Christopher J. Nelli, Scott Stephen Liebert, Kevin John Mlnarik
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Patent number: 8858071Abstract: A method and apparatus for monitoring during dynamic processes that determines when effective measurements of thermal effusivity and/or thermal conductivity can be made during a portion of a cycle during a calibration phase, then measures thermal effusivity and/or thermal conductivity during a subsequent dynamic process in dependence upon the time delay value and the measurement duration value until a desired value is obtained. A sensor having a measurement period of between one to two seconds allows monitoring of materials during dynamic processes such as tumbling, blending, mixing, and rocking. For example, measurements can be made until a value indicative of a desired mixture condition is obtained.Type: GrantFiled: December 16, 2004Date of Patent: October 14, 2014Assignee: C-Therm Technologies Ltd.Inventors: Michael Emanuel, Chongde Zhao, Biao Yu, Dimitri Vinnik, Chris Rendell
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Publication number: 20140301424Abstract: A method for measuring thermal conductivity of a material contains the now described steps. A heat pulse is applied to a front side of the material. The resulting time-dependent two-dimensional temperature field of the front side of the material is detected using an infrared detector. An isotherm is identified in the temperature field. First and second thermal conductivities of the material in first and second directions of the material are calculated on the basis of the shape of the isotherm and on the basis of first and second temperatures detected at one point of the front side of the material at two points in time.Type: ApplicationFiled: June 23, 2014Publication date: October 9, 2014Inventors: WOJCIECH ADAMCZYK, RYSZARD BIALECKI, TADEUSZ KRUCZEK
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Patent number: 8851746Abstract: A subterranean grouting method including (a) placing a sample of a grout mixture within a test container, (b) separating a sand component from the sample, (c) determining if the grout mixture exhibits a thermal conductivity within a predetermined thermal conductivity range based upon a proportion of the sand component within the sample, and (d) upon determining that the grout mixture exhibits a thermal conductivity with the predetermined thermal conductivity range, securing a conduit within a subterranean bore with the grout mixture, wherein (a), (b), (c), and (d) are carried out proximate each other at a job site.Type: GrantFiled: October 26, 2012Date of Patent: October 7, 2014Assignee: Halliburton Energy Services, Inc.Inventors: Ryan Patrick Collins, Shantel Stone, Laura Kuri
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Patent number: 8851747Abstract: A thermal conductivity measurement apparatus for measuring a thermal conductivity of a one-dimensional material includes a substrate, a vacuum chamber receiving the substrate and four spaced electrodes. The one-dimensional material spans across the four spaced electrodes. A middle part of the one-dimensional material, located between the second and third electrodes, is suspended.Type: GrantFiled: April 25, 2013Date of Patent: October 7, 2014Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.Inventors: Qing-Wei Li, Chang-Hong Liu, Shou-Shan Fan
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Publication number: 20140294039Abstract: The methods of heterogeneity characterization and determination of thermal conductivity of materials provides for heating a surface of the heterogeneous solid samples during the movement of the samples relative to a heating source and a temperature recording unit. Prior to the measurements the measurement parameters are adjusted so as to provide the best spatial resolution and a required uncertainty of the measurements. Distributions of initial temperature on the surface of the samples before and after heating are measured and heterogeneity of the samples is estimated on the basis of the temperature change along the line of the temperature recording unit movement. Thermal conductivity of homogeneous regions of the samples is determined using solution of the coefficient inversed problem with the measured temperatures.Type: ApplicationFiled: May 31, 2011Publication date: October 2, 2014Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Yury Anatolievich Popov, Anton Vladimirovich Parshin
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Patent number: 8777482Abstract: A method for detecting defect in a weld seam during laser welding. The method includes performing a two-dimensionally locally resolved detection of radiation that is emitted by a solidified molten mass that is adjacent to a liquid melting bath. The method also includes determining at least one characteristic value for heat dissipation in the solidified molten mass by evaluating the detected radiation along at least one profile-section of the solidified molten mass, and detecting a defect in the weld seam by comparing the at least one characteristic value with at least one reference value.Type: GrantFiled: November 24, 2009Date of Patent: July 15, 2014Assignee: TRUMPF Werkzeugmaschinen GmbH + Co. KGInventors: Dieter Pfitzner, Tim Hesse, Winfried Magg
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Patent number: 8746968Abstract: A sensor (10; 34) for measuring and/or detecting fouling that forms directly or indirectly on a so-called front surface of the sensor, includes the following in the form of a plurality of superimposed layers: —at least one heating element (14) that is able to diffuse, on command, a homogenous, monitored heat flow whose heat output is less than 200 mW, —a heat insulator (11) located on the side opposite the front surface of the sensor to prevent dissipation of the heat flow from the opposite side, —at least one temperature measuring element (16) that is placed in the homogenous heat flow diffused by the at least one heating element and that offers a precision of temperature measurement of better than 0.1° C., and —a substrate (12; 42) on which the layers of the at least one heating element and at least one temperature measuring element are connected.Type: GrantFiled: January 19, 2010Date of Patent: June 10, 2014Assignee: NeosensInventors: Laurent Auret, Frederic Flourens, Luc Fillaudeau
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Patent number: 8744818Abstract: A thermal-fluid-simulation analyzing apparatus includes an execution unit that generates an analysis model using analysis conditions to conduct a first thermal fluid simulation analysis based on the generated analysis model, an analysis-condition collecting unit that collects analysis conditions when a predetermined period passes after the first thermal fluid simulation analysis, a condition extracting unit that extracts a boundary condition from the analysis conditions collected by the analysis-condition collecting unit, and a re-execution unit that selects a region corresponding to the boundary condition extracted by the condition extracting unit from regions of the analysis model generated by the execution unit, updates the selected region with the boundary condition, and conducts a second thermal fluid simulation analysis for the updated analysis model.Type: GrantFiled: August 6, 2010Date of Patent: June 3, 2014Assignee: Fujitsu LimitedInventors: Akira Ueda, Junichi Ishimine, Ikuro Nagamatsu, Masahiro Suzuki, Tadashi Katsui, Yuji Ohba, Seiichi Saito, Nobuyoshi Yamaoka, Yasushi Uraki
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Patent number: 8727609Abstract: A method for thermal characterization of a portion of first material of elongate shape on which there is arranged a portion of a second, electrically conductive material of elongate shape, the method including: a) determining characteristic of the portion of second material, b) applying an electric current of angular frequency between ends of the portion of the second material, and measuring the angular frequency harmonic of the electric voltage between these ends for different values of angular frequency, c) calculating coefficient of thermal conductivity of the portion of first material from the values of the harmonic and of the determined characteristic, a width of the portion of the first material being between about 0.9 and 1.1 times the width of the portion of second material, the portion of first material being surrounded by thermal insulation.Type: GrantFiled: October 28, 2010Date of Patent: May 20, 2014Assignee: Commissariat à l'énergie atomique et aux énergies alternativesInventors: David Hauser, Marc Plissonnier
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Publication number: 20140119401Abstract: A subterranean grouting method comprising (a) placing a sample of a grout mixture within a test container, (b) separating a sand component from the sample, (c) determining if the grout mixture exhibits a thermal conductivity within a predetermined thermal conductivity threshold based upon a proportion of the sand component within the sample, and (d) upon determining that the grout mixture exhibits a thermal conductivity with the predetermined thermal conductivity range, securing a conduit within a subterranean bore with the grout mixture, wherein (a), (b), (c), and (d) are carried out proximate each other at a job site.Type: ApplicationFiled: October 26, 2012Publication date: May 1, 2014Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Ryan Patrick COLLINS, Shantel STONE, Laura KURI
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Publication number: 20140105241Abstract: A method and system for analyzing temperature gradient bifurcation in a porous medium by studying the convective heat transfer process within a channel filled with a porous medium with internal heat generation is disclosed. A LTNE model can be employed to represent the energy transport within a porous medium. Exact solutions can be derived for both fluid and solid temperature distributions for two primary approaches for the constant wall heat flux boundary condition. The Nusselt number for the fluid at the channel wall is also obtained. The effects of pertinent parameters such as fluid and solid internal heat generations, Biot number, and a fluid-to-solid effective thermal conductivity ratio can be determined. It can be shown that internal heat generation in a solid phase is significant for heat transfer characteristics.Type: ApplicationFiled: October 11, 2012Publication date: April 17, 2014Inventors: Kambiz Vafai, Kun Yang
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Publication number: 20140079091Abstract: A heat flux sensor comprising at least one support, where at least one membrane is suspended relative to the support by at least four nanowires, where the membrane is made from at least one current-conducting material, and where the nanowires are made from a current-conducting material, with two nanowires connected to a current source to polarise the membrane between two terminals and a heater for heating the membrane, and where two nanowires are connected to a voltmeter to form measure the voltage at the terminals of the membrane.Type: ApplicationFiled: September 18, 2013Publication date: March 20, 2014Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENE ALTInventors: Jeremie RUELLAN, Laurent Duraffourg
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Publication number: 20140079089Abstract: A multi-purpose, cylindrical thermal insulation test apparatus is used for testing insulation materials and systems of materials using a liquid boil-off calorimeter system for absolute measurement of the effective thermal conductivity (k-value) and heat flux of a specimen material at a fixed environmental condition (cold-side temperature, warm-side temperature, vacuum pressure level, and residual gas composition). The apparatus includes an inner vessel for receiving a liquid with a normal boiling point below ambient temperature, such as liquid nitrogen, enclosed within a vacuum chamber. A cold mass assembly, including the upper and lower guard chambers and a middle test vessel, is suspended from a lid of the vacuum canister. Each of the three chambers is filled and vented through a single feedthrough. All fluid and instrumentation feedthroughs are mounted and suspended from a top domed lid to allow easy removal of the cold mass.Type: ApplicationFiled: November 26, 2013Publication date: March 20, 2014Inventors: James E. Fesmire, Adam G. Dokos
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Publication number: 20140056326Abstract: This invention relates to methods for determination of thermophysical properties of porous media filled with fluid, gas, or other mineral medium, and can be used, in particular, in the oil and gas industry. When implementing the method, it is necessary to initially determine a composition of a saturated porous medium and thermal conductivity coefficients of its components. A three-dimensional image of a sample of the porous medium is obtained by X-ray scanning. A thermal conductivity coefficient of the medium is determined by solving thermal conductivity problems, based on decomposition of a computational domain followed by composition.Type: ApplicationFiled: December 30, 2010Publication date: February 27, 2014Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Alexander Petrovich Skibin, Darya Aleksandrovna Mustafina, Aleksandra Evgenievna Komrakova
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Patent number: 8641271Abstract: A method for testing heat pipes includes the following steps. A plurality of bar-shaped heat pipes having the same size is provided, and the heat pipes are deformed. The deformed heat pipes are placed in a temperature regulator, such that a temperature of the heat pipes is periodically changed between a first temperature and a second temperature. The heat pipes are then taken out of the temperature regulator. One end of each heat pipe is maintained at a third temperature by a thermostatic device, and a heat pipe temperature difference of two opposite ends of the heat pipe is measured. The heat pipes having the heat pipe temperature difference greater than a standard temperature difference in the heat pipes are marked.Type: GrantFiled: May 3, 2010Date of Patent: February 4, 2014Assignee: Inventec CorporationInventors: Feng-Ku Wang, Yi-Lun Cheng, Chih-Kai Yang
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Publication number: 20140016664Abstract: A method for measuring the thermal conductivity along three directions of an anisotropic thin material includes: positioning on the surface of the material a plurality N of sensors able to measure the temperature of the material at N measuring points; generating a heat flux from a heat source positioned on a surface of the material; determining a mapping of the theoretical temperature of the material at the N measuring points of the N sensors along three directions by using a calculator, determining a mapping of the real temperature on the surface of the anisotropic material by measuring the temperature of the material at the N measuring points of N sensors; determining using the calculator the real thermal conductivity of the thin anisotropic material, along three directions, by a plurality of adjustments of the theoretical thermal conductivity by minimising the difference between the theoretical temperature and the real temperature for each of the N temperature measuring points.Type: ApplicationFiled: July 12, 2013Publication date: January 16, 2014Inventors: Joel Pauchet, Ludovic Rouillon
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Patent number: 8628238Abstract: A multi-purpose, cylindrical thermal insulation test apparatus is used for testing insulation materials and systems of materials using a liquid boil-off calorimeter system for absolute measurement of the effective thermal conductivity (k-value) and heat flux of a specimen material at a fixed environmental condition (cold-side temperature, warm-side temperature, vacuum pressure level, and residual gas composition). The apparatus includes an inner vessel for receiving a liquid with a normal boiling point below ambient temperature, such as liquid nitrogen, enclosed within a vacuum chamber. A cold mass assembly, including the upper and lower guard chambers and a middle test vessel, is suspended from a lid of the vacuum canister. Each of the three chambers is filled and vented through a single feedthrough. All fluid and instrumentation feedthroughs are mounted and suspended from a top domed lid to allow easy removal of the cold mass.Type: GrantFiled: June 11, 2010Date of Patent: January 14, 2014Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: James E. Fesmire, Adam G. Dokos
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Publication number: 20140010258Abstract: The inventive concept relates to a thermal conductivity measuring device and a method of measuring the thermal conductivity. The thermal conductivity measuring device may include a first structure which is connected to one side end of a sample and receives heat from a heat source; a second structure connected to the other side end of the sample; a first stage connected to the first structure while supporting the first structure; a second stage connected to the second structure while supporting the second structure; a connection unit connected between the first stage and the second stage; and a measuring unit measuring temperatures of the first and second structures and the first and second stages. Since the thermal conductivity measuring of the inventive concept correct a temperature change of a stage due to heat transmission emitted from the stage considering a measurement environment, reliability of measurement may be improved.Type: ApplicationFiled: February 28, 2013Publication date: January 9, 2014Applicant: Electronics and Telecommunications Research InstituteInventors: Younghoon Hyun, Young Sam Park, Moon Gyu Jang, Taehyoung Zyung
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Patent number: 8608373Abstract: In a local softening point measuring apparatus and thermal conductivity measuring apparatus using a probe microscope as a base, environment of the prob˜ and a sample surface is set to 1/100 atmospheric pressure (103 Pa) or lower. Otherwise, a side surface of the probe is coated with a thermal insulation material having a thickness that enables thermal dissipation to be reduced to 1/100 or lower, to thereby reduce the thermal dissipation from the side surface of the probe, and exchange heat substantially only at the contacting portion between the probe and the sample surface.Type: GrantFiled: August 11, 2010Date of Patent: December 17, 2013Assignee: SII NanoTechnology Inc.Inventors: Kazunori Ando, Masayuki Iwasa, Masatsugu Shigeno, Hiroumi Momota, Kazutoshi Watanabe
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Patent number: 8585283Abstract: A method of using Structural Health Monitoring (SHM) techniques for determining whether changes in thermal conductivity have occurred to a particular interface between two joined structural members is described, which is particularly useful in satellites or other structures ordinarily subjected to vacuum pressure.Type: GrantFiled: April 2, 2012Date of Patent: November 19, 2013Assignee: The United States of America as Represented by the Secretary of the Air ForceInventors: Derek Doyle, Derek Hengeveld
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Publication number: 20130301671Abstract: Detecting TIM between a heat sink and an integrated circuit, the integrated circuit including TIM detection points adapted to receive TIM upon installation of the heat sink and including a TIM detection device configured to be activated upon contact with TIM, including: receiving, upon installation of the heat sink on the integrated circuit and the TIM, TIM in one or more of the TIM detection points; activating, by the TIM in each of the one or more TIM detection points receiving the TIM, a TIM detection device; determining, by a TIM detection module of the integrated circuit in dependence upon the activations of the TIM detection devices, sufficiency of the TIM; and responsive to determining that the TIM between the heat sink and the integrated circuit is insufficient, controlling, in real-time by the TIM detection module, operation of the integrated circuit to reduce heat generated by the integrated circuit.Type: ApplicationFiled: May 11, 2012Publication date: November 14, 2013Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: William M. Megarity, LUKE D. REMIS, GREGORY D. SELLMAN
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Publication number: 20130301670Abstract: Detecting TIM between a heat sink and an integrated circuit, the heat sink including TIM detection points, each TIM detection point adapted to receive TIM upon installation of the heat sink, each TIM detection point including a TIM detection device configured to be activated upon contact with TIM, including: receiving, upon installation of the heat sink on the integrated circuit and the TIM, TIM in one or more of the TIM detection points; activating, by the TIM in each of the one or more TIM detection points receiving the TIM, a TIM detection device; and determining, by a TIM detection module in dependence upon the activations of the TIM detection devices, sufficiency of the TIM between the heat sink and the integrated circuit.Type: ApplicationFiled: May 11, 2012Publication date: November 14, 2013Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: William M. Megarity, Luke D. Remis, Gregory D. Sellman
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Patent number: 8573835Abstract: A method and apparatus for the measurement of thermal conductivity combines the following capabilities: 1) measurements of very small specimens; 2) measurements of specimens with thermal conductivity on the same order of that as air; and, 3) the ability to use air as a reference material. Care is taken to ensure that the heat flow through the test specimen is essentially one-dimensional. No attempt is made to use heated guards to minimize the flow of heat from the hot plate to the surroundings. Results indicate that since large correction factors must be applied to account for guard imperfections when specimen dimensions are small, simply measuring and correcting for heat from the heater disc that does not flow into the specimen is preferable.Type: GrantFiled: June 8, 2012Date of Patent: November 5, 2013Assignee: The United States of America as Represented by the Administrator of National Aeronautics and Space AdministrationInventors: Robert A Miller, Maria A Kuczmarski
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Publication number: 20130235900Abstract: A thermal conductivity measurement apparatus for measuring a thermal conductivity of a one-dimensional material includes a substrate, a vacuum chamber receiving the substrate and four spaced electrodes. The one-dimensional material spans across the four spaced electrodes. A middle part of the one-dimensional material, located between the second and third electrodes, is suspended.Type: ApplicationFiled: April 25, 2013Publication date: September 12, 2013Applicants: HON HAI PRECISION INDUSTRY CO., LTD., TSINGHUA UNIVERSITYInventors: QING-WEI LI, CHANG-HONG LIU, SHOU-SHAN FAN
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Publication number: 20130225985Abstract: A system and method for transducer placement in soft-field tomography are provided. One system includes a plurality of transducers configured for positioning at a surface of an object in a non-soft-field tomography configuration. The system also includes an interface and a processor communicating with the plurality of transducers via the interface. The processor is configured to perform soft-field sensing using soft-field data acquired by the plurality of transducers.Type: ApplicationFiled: February 27, 2012Publication date: August 29, 2013Applicant: General Electric CompanyInventors: Alexander Seth Ross, Jeffrey Michael Ashe
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Publication number: 20130223474Abstract: Disclosed is an analysis system and method for visualizing heat conduction of a solid state sample. The analysis system includes a sealed jig chamber, a jig, an air tempering unit, and a thermal image camera. The sealed jig chamber includes a chamber door for opening/closing the jig chamber. The jig is removeably mounted in the jig chamber and comprises a heat source in surface contact with a solid state sample to induce the heat conduction of the solid state sample. The air tempering unit supplies hot air into the jig and supplies cool air into the jig chamber. The thermal image camera photographs the heat conduction of the solid state sample to acquire a thermal image or video.Type: ApplicationFiled: November 19, 2012Publication date: August 29, 2013Applicant: HYUNDAI MOTOR COMPANYInventor: Hyundai Motor Company
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Patent number: 8516829Abstract: Embodiments of the invention can provide systems and methods for modifying the operation and/or performance of a gas turbine. According to one embodiment, a method for modifying the performance of a gas turbine comprising one or more combustors can be provided. The method can include measuring a gas exhaust temperature for the gas turbine and estimating a heat transfer rate for the gas turbine based at least in part on the gas exhaust temperature. After estimating the heat transfer rate, the method can continue by estimating a transiently accurate combustion reference temperature and using this parameter to control the one or more combustors of the gas turbine. In doing so, the performance of the gas turbine can be modified to ensure reliable and consistent operation.Type: GrantFiled: May 27, 2009Date of Patent: August 27, 2013Assignee: General Electric CompanyInventors: David Ewens, Kevin Wilkes, Christopher Long, Noemie Dion Ouellet
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Patent number: 8511892Abstract: A device for measuring the body core temperature of a person contains a structure for firmly wrapping around the upper body of the person. A double temperature sensor is connected with the structure for wrapping around the upper body such that the double temperature sensor is pressed elastically onto the upper body in the state in which it is put on in the area of the sternum. The device for measuring the body core temperature is suitable for the integration of a body core temperature measurement in clothing or chest belt systems.Type: GrantFiled: February 22, 2005Date of Patent: August 20, 2013Assignee: Drägerwerk AktiengesellschaftInventor: Jochim Koch
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Patent number: 8491184Abstract: A sensor apparatus and sensor apparatus system for use in conjunction with a cassette, including a disposable or replaceable cassette. In some embodiments, the cassette includes a thermal well for permitting the sensing of various properties of a subject media. The thermal well includes a hollow housing of a thermally conductive material. In other embodiments, the cassette includes sensor leads for sensing of various properties of a subject media. The thermal well has an inner surface shaped so as to form a mating relationship with a sensing probe. The mating thermally couples the inner surface with a sensing probe. In some embodiments, the thermal well is located on a disposable portion and the sensing probe on a reusable portion.Type: GrantFiled: February 27, 2008Date of Patent: July 23, 2013Assignee: DEKA Products Limited PartnershipInventors: Dean Kamen, N. Christopher Perry, Jason A. Demers, Brian Tracey, Arun D. Chawan, Kevin L. Grant
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Patent number: 8491185Abstract: A method for checking the quality of thermal coupling between a measuring cell and a thermostatted element of an analyzer, where the measuring cell can be exchangeably inserted into an analyzer to measure at least one parameter of a sample, and is provided with at least one sensor element in a measuring channel.Type: GrantFiled: December 10, 2009Date of Patent: July 23, 2013Assignee: Roche Diagnostics Operations Inc.Inventors: Wolf-Dietrich Steinboeck, Robert Felsberger, Michael Kraker, Friedrich Schneider, Juergen Walla