37 results about "Thermal effusivity" patented technology

A temporal thermal survey method to locate at a given area whether or not there is a subsurface object or void site. The method uses thermal inertia change detection. It locates temporal heat flows from naturally heated subsurface objects or faulty structures such as corrosion damage. The added value over earlier methods is the use of empirical methods to specify the optimum times for locating subsurface objects or voids amidst clutter and undisturbed host materials. Thermal inertia, or thermal effusivity, is the bulk material resistance to temperature change. Surface temperature highs and lows are shifted in time at the subsurface object or void site relative to the undisturbed host material sites. The Dual-band Infra-Red Effusivity Computed Tomography (DIRECT) method verifies the optimum two times to detect thermal inertia outliers at the subsurface object or void border with undisturbed host materials.

A computer-implemented method for automated thermal computed tomography includes providing an input of heat, for example, with a flash lamp, onto the surface of a sample. The amount of heat and the temperature rise necessary are dependent on the thermal conductivity and the thickness of the sample being inspected. An infrared camera takes a rapid series of thermal images of the surface of the article, at a selected rate, which can vary from 100 to 2000 frames per second. Each infrared frame tracks the thermal energy as it passes from the surface through the material. Once the infrared data is collected, a data acquisition and control computer processes the collected infrared data to form a three-dimensional (3D) thermal effusivity image.

The present invention is directed to providing a fixing member that has a flexible surface and that can supply a larger amount of heat to a material to be recorded and a toner in a shorter period of time. The fixing member comprises a substrate, an elastic layer and a releasing layer, wherein thermal effusivity in a depth region from a surface of the releasing layer is 1.5 [kJ / (m2·K·sec0.5)] or more, the depth region corresponding to a thermal diffusion length when an alternating-current temperature wave having a frequency of 10 Hz is applied to the surface of the releasing layer, and a surface micro rubber hardness is 85 degrees or less.

The present invention provides a thermal paper composite precursor comprising (a) a substrate layer; and (b) a base layer positioned on the substrate layer, the base layer comprising a binder and at least one porosity improver wherein the thermal paper composite precursor has a thermal effusivity that is at least about 2% less than the thermal effusivity of porosity improver-less thermal paper composite precursor. The thermal paper composite precursor is useful in making thermal paper composite.

The present invention is directed to providing a fixing member that has a flexible surface and that can supply a larger amount of heat to a material to be recorded and a toner in a shorter period of time. The fixing member comprises a substrate, an elastic layer and a releasing layer, wherein thermal effusivity in a depth region from a surface of the releasing layer is 1.5 [kJ / (m2·K·sec0.5)] or more, the depth region corresponding to a thermal diffusion length when an alternating-current temperature wave having a frequency of 10 Hz is applied to the surface of the releasing layer, and a surface micro rubber hardness is 85 degrees or less.

A computer-implemented method, apparatus, and computer program product implement enhanced thermal tomography three-dimensional (3D) thermal effusivity imaging. Experimental thermal imaging data is acquired. A response function is derived and a convolution formulation is constructed from the experimental thermal imaging data. A deconvolution solution procedure is implemented that includes constructing a matrix solution equation with a damping parameter, and solving the matrix solution equation with a selected number of iterations to construct a plurality of effusivity images. Using the novel depth deconvolution algorithm with experimental data acquired from a one-sided pulsed thermal-imaging system provides greater sensitivity for internal sample features substantially eliminating degradation in depth resolution.

Provided is a surface-coated cutting tool combining superior heat resistance, superior wear resistance, and superior lubricity. A surface-coated cutting tool of the present invention includes a substrate and a coating formed on the substrate, and the coating is characterized in that the coating is formed by physical vapor deposition and includes one or more layers, that at least one of the one or more layers is a first coating layer, and that the first coating layer contains aluminum and nitrogen, has a thermal effusivity of 2,000 to 5,000 J·sec−1 / 2·m−2·K−1, has a thickness of 0.2 to 5 μm, and has a crystal structure including a hexagonal structure.

The invention discloses a phase change heat storage heating device capable of improving the utilization rate of a phase change material. The device comprises an external box body (1) and an internal heat exchange tube structure. Hot water flows in, firstly exchanges heat with the phase change material at the bottom, then flows upwards to exchange heat with the surrounding phase change material, and finally flows out. As the water temperature of the lower part of the device is generally high, the heat exchange temperature difference with the phase change material is large and the heat exchange effect is obvious; and the heat exchange area of the upper part of the device is increased, so that most phase change materials in the device are uniformly and fully heated. Compared with the prior art, the phase change material has good heat storage performance and heat release performance, can store and release more heat, and has higher phase change material utilization rate and heat storage ratio; and manufacturing cost is low, and popularization is easy.

A rotatable heating member incorporating a heat source configured to heat a toner image on a sheet includes an elastic layer and a surface layer provided on the elastic layer. When thermal effusivity of the surface layer is Bs and thermal effusivity of the elastic layer is Be, the following relationship is satisfied:−0.04<(Be−Bs) / Be<0.04.

There is provided a novel heat regenerating element having an excellent heat regenerating property which can accumulate thermal energy and effectively radiate the accumulated thermal energy to various objects. The present invention further provides a heat regenerating material including the heat regenerating element. The heat regenerating element of the present invention includes: 100 parts by weight of a base component composed of 60 to 90 parts by weight of a hydrotalcite compound and a remnant including at least one of zinc oxide and electrically-conductive zinc oxide; and 0.5 to 1 parts by weight of at least one heat regeneration enhancing component selected from a group of zirconium oxide components and zirconium carbide components.

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.

The present invention provides a heat storage device, a heat storage system, and a heat storage method capable of suppressing an increase in running cost, preventing energy shortage even when heat extraction is progressing, and reducing heat radiation loss. The heat storage device includes: a heat storage tank containing a heat storage material having heat storage performance and heat release performance; a heat source unit that generates heat supplied to the heat storage material; A first heat medium flow path, the first heat medium flow path is used for the flow of the first heat medium, and is thermally connected with the heat storage material and the heat source machine; and a plurality of temperature sensors, the plurality of temperature sensors are arranged in the heat storage tank , and measure the temperature of the heat storage material. The plurality of temperature sensors are arranged at positions at different distances from the heat transfer surface of the first heat medium flow path where the first heat medium flow path and the heat storage material come into contact. The heat source machine generates heat based on the detection results of the plurality of temperature sensors.

The invention discloses a composite bottom pot body and a manufacturing method thereof. The composite bottom pot body (100) comprises a pot bottom wall (1) and a composite bottom sheet (3) arranged at the bottom of the pot bottom wall. The pot bottom wall and the composite bottom sheet A compound bottom cavity (5) is formed therebetween, the pot bottom wall and the compound bottom sheet are fixedly connected by a connecting piece (2), and the compound bottom cavity is also filled with a sintered compound bottom cavity filling material (4). The manufacturing method includes connecting the double bottom sheet at the bottom of the bottom wall of the pot through a connecting piece; welding and sealing the peripheral edge (31) of the double bottom sheet and the outer peripheral wall of the pot body; filling the compound bottom cavity between the reciprocating bottom sheet and the pot body. The bottom cavity filling material; finally, the pot body with the double bottom sheet and the double bottom cavity filling material is heated. The cookware of the invention can thicken the bottom of the pan, improve the heat storage performance and thermal conductivity of the bottom of the pan, improve the temperature uniformity of the bottom of the pan, reduce the generation of oil fume, and improve the product quality and user experience. The manufacturing method is simple, practical and low in cost, and can be used in mass production with high efficiency.

The invention discloses a preparation method of a medium-high temperature mixed molten salt heat storage system with high latent heat. The medium-high temperature mixed molten salt heat transfer heat storage medium with high latent heat adopts a substance comprising the following mass fraction: NaNO 3 The mass percentage is 20%~80%, Na 2 CO 3 The mass percentage is 0% to 30% and the NaOH mass percentage is 10% to 80%, wherein, Na 2 CO 3 The mass percentage is not 0. The low-melting point molten salt heat transfer and heat storage medium provided by the present invention has large phase change latent heat, high upper limit temperature and wide working temperature range, and has good heat transfer and heat storage performance, and is very suitable for medium Heat transfer and heat storage for high temperature solar thermal power generation.

Provided is a surface-coated cutting tool combining superior heat resistance, superior wear resistance, and superior lubricity with high adhesion between a substrate and a coating. A surface-coated cutting tool of the present invention includes a substrate and a coating formed on the substrate, and the coating is characterized in that the coating is formed by physical vapor deposition and includes one or more layers, that at least one of the one or more layers is a first coating layer, that the first coating layer contains aluminum and nitrogen, has a thermal effusivity of 2,000 to 5,000J·sec−1 / 2·m−2·K−1, and has a thickness of 0.2 to 5μm, that the first coating layer includes an amorphous region and a crystalline region in order from the substrate side, that the amorphous region is amorphous and has a thickness of 0.01 to 2μm, and that the crystalline region has a crystal structure including a hexagonal structure.

The invention discloses a PCM energy storage structure capable of increasing the crystallization speed of a phase change energy storage material. It is provided with a sealed container and a phase change energy storage material stored in the sealed container. The phase change energy storage material is exchanged with the outside through the sealed container. heat; there are also multiple crystallization auxiliary cores placed in the phase change energy storage material; the specific gravity of the crystallization auxiliary core is within ±10% of the specific gravity of the phase change energy storage material in the liquid state, and the crystallization auxiliary core is composed of non-phase change energy storage material, and: the thermal conductivity of the non-phase change energy storage material is higher than the thermal conductivity of the phase change energy storage material in the liquid state, the non-phase change energy storage material and the phase change energy storage material in the liquid state When the contact angle is below 90°, the melting point of the non-phase-change energy storage material is higher than that of the phase-change energy storage material in a solid state. The invention can increase the crystal nucleus nucleation speed of the phase change energy storage material when exothermic, so that the phase change energy storage material can be solidified from liquid state to solid state more quickly, and the heat storage performance of the PCM energy storage structure is improved.

Body support cushions, such as mattresses, are disclosed. The cushions comprise a plurality of separate and distinct consecutive layers (12) overlying over each other in a depth direction. Each layer (12) includes thermal effusivity enhancing material with a thermal effusivity greater than or equal to 2,500 WsO,5 / (m2K), and the total thermal effusivity of increases from layer to layer in the depth direction (D1). The plurality of layers (12) include a plurality of phase change layers (20,22,24) that each comprise a solid-to-liquid phase change material PCM (26) with a phase change temperature within the range of about 6 to about 45 DEG C. The total mass of the PCM (26) increases from layer to layer in the depth direction (D1). At least one layer (20,22,24) of the plurality of phase change layers (12) includes a gradient distribution of the mass of the PCM (26) and the amount of the thermal effusivity enhancing material TEEM (28) thereof that increases in the depth direction (D1).