1492 results about "Specific heat" patented technology

A robust multiple-walled, multi-pass, high cooling effectiveness cooled turbine vane or blade designed for ease of manufacturability, minimizes cooling flows on highly loaded turbine rotors. The vane or blade design allows the turbine inlet temperature to increase over current technology levels while simultaneously reducing turbine cooling to low levels. A multi-wall cooling system is described, which meets the inherent conflict to maximize the flow area of the cooling passages while retaining the required section thickness to meet the structural requirements. Independent cooling circuits for the vane or blade's pressure and suction surfaces allow the cooling of the airfoil surfaces to be tailored to specific heat load distributions (that is, the pressure surface circuit is an independent forward flowing serpentine while the suction surface is an independent rearward flowing serpentine). The cooling air for the independent circuits is supplied through separate passages at the base of the vane or blade. The cooling air follows intricate passages to feed the serpentine thin outer wall passages, which incorporate pin fins, turbulators, etc. These passages, while satisfying the aero/thermal/stress requirements, are of a manufacturing configuration that may be cast with single crystal materials using conventional casting techniques.

Methods, computer programming and devices for transferring heat to and/or from a body portion of a mammal are provided. One approach includes directly determining a state of vasoconstriction or vasodilation in a portion of a body, and supplying heat to the portion of the body when vasoconstriction is determined, and removing heat from the portion of the body when vasodilation is determined. The body portion preferably includes specific heat exchange vasculature. In another approach, a transition of the body portion from a state of vasodilation to vasoconstriction is determined and the body portion is then actively kept in a state of vasodilation while removing heat therefrom.

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 wireless charging device comprises an electronic switch and a transmitting coil (L1) electrically connected with a power source in sequence. A control end of the electronic switch is connected with a transmitting control unit. The wireless charging device further comprises a current limiting resistance (R1) connected in serial with the transmitting coil. The wireless charging device further comprises a compensation capacitor (C1) connected in parallel with the transmitting coil. An insert total electromagnetic coupling structure is further employed for charging. Such wireless charging device is particularly suitable for electronic cigarette, with low cost, stable and reliable working status and high efficiency, and specific heat sink is not required.

In a magnetic heat pump system, in which heat transport medium is heated or cooled by magnetocaloric effect material accommodated in a magnetic heat pump device. A material having a coefficient of thermal conductivity, which is higher than that of the heat transport medium, or a material having a specific heat or a volume specific heat, which is higher than that of the heat transport medium, is mixed in the heat transport medium. A coefficient of thermal conductivity of the heat transport medium is thereby increased so as to increase heating and/or cooling performance of the magnetic heat pump system.

A data storage and retrieval system such as a robotic library has a large plurality of removable storage media, such as tape cartridges, for purposes of I/O. To enhance performance and reliability of the library, a thermodynamic model of the library is constructed and stored in the library, and environmental conditions such as the temperature, humidity, and flow rate of cooling air coming into, flowing through, and leaving the library are monitored. The thermodynamic model of the library includes an acceptable operating range for the library in a psychrometric chart; and the product of the effective thermodynamic mass and specific heat of the library.

The invention discloses a thermal management device for power batteries and a thermal management method for the power batteries under abnormal working conditions. The thermal management device for the power batteries comprises an acquisition module, an evaluation module, a forecast module, a display module and a control module, wherein the forecast module is used for calculating the heat generation rate and the specific heat capacity according to temperature and temperature rise rate information obtained by the acquisition module and the evaluation module and information such as types, operating states, states of charge and the like of the power batteries so as to obtain forecasted temperature field distribution of a battery unit, and the display module is used for displaying the temperature field distribution of the battery unit forecasted by the forecast module and a current alarm status of the battery unit to a user. The thermal management method for the power batteries is capable of forecasting the temperature field distribution of the battery unit according to acquired temperature and temperature rise data, and at least one of control measures such as turn-off, heat dissipation, alarm and the like is effectively taken, so that the danger of an automobile due to the power batteries can be reduced under the abnormal working conditions.

The invention relates to a liquefied compressed air energy storage system with cold-storage liquid media. The liquefied compressed air energy storage system comprises compressor systems, a cold storage system, a heat storage system, a liquefying system and a turbine power generation system. During energy storage, the multistage compressor system is driven by renewable energy sources, so that compressed air is supercharged to exchange heat with a room-temperature cold-storage liquid medium, the cold quantity stored in the liquid medium is lowered to liquefying temperature, and the compressed air is liquefied through throttling; during energy releasing, the liquid air is supercharged to exchange heat with a high-temperature cold-storage liquid medium, the medium recycles cold energy to give to the liquefying process, and the air is warmed to be vaporized; room-temperature high-pressure air is input into a multi-stage turbine expander for acting, and a power generator is driven to output electric energy; the heat storage system reduces the power consumption of the next stage of compressor, and the stored heat is heated step by step before expansion to raise the intake air temperature; a cold-storage medium with a low freezing point and a high/low boiling point recycles the cold energy of the liquid air, the specific heat capacity of the liquid media is large, and the large-temperature-span heat exchange is realized. The liquefied compressed air energy storage system has the advantages of being simple in structure and stable in performance, can realize integration of energy storage and power generation, and can realize the large-scale grid-connection of renewable energy generation, therefore improving the capacity of a power grid accepting new energy power generation.

Semiconductor wafers with a diameter of at least 200 mm comprise a silicon carrier wafer, an electrically insulating layer and a semiconductor layer located thereon, the semiconductor wafer having been produced by means of a layer transfer process comprising at least one RTA step, wherein the semiconductor wafer has a warp of less than 30 μm, a DeltaWarp of less than 30 μm, a bow of less than 10 μm and a DeltaBow of less than 10 μm. Processes for the production of a semiconductor wafer of this type require specific heat treatment regimens.

The invention discloses a novel phase-change material composition. The novel phase-change material composition mainly comprises carbon nanotubes, graphene, fumed silica, metal or metal oxide particles and a phase-change material. The carbon nanotubes, graphene and metal or metal oxide particles can further accelerate heat transmission. The phase-change material is used for improving a hot end initial temperature absorption rate. The fumed silica has effects of precipitation prevention and thickening and can prevent graphene and particle aggregation settlement after heat absorption liquefaction of the phase-change material. The carbon nanotubes, graphene and metal or metal oxides can finally form a full 3D network comprising particles (metal or metal oxides), wires (carbon nanotubes) and planes (graphene) in the fluid (of phase-change material subjected to heat absorption melting). The novel phase-change material composition has high heat conductivity and low thermal resistance value, has high specific heat capacity, greatly improves phase-change material heat absorption, heat storage and heat radiation efficiency and has a high practical value.

A fluid supply apparatus with a plurality of flow lines branching out from one regulator for adjustment of pressure, the flow lines being arranged in parallel, wherein a measure is taken that the operation, that is, opening or closing of one flow passage will have no transient effect on the steady flow of the other flow passages. For this purpose, each flow passage is provided with a time delay-type mass flow controller MFC so that when one closed fluid passage is opened, the mass flow controller on that flow passage reaches a set flow rate Qs in a specific delay time DELTAt from the starting point. Also provided are a method and an apparatus for the above in which a plurality of gas types can be controlled in flow rate with high precision by one pressure-type flow control system. To that end, a formula for calculating the flow rate of a gas is theoretically derived that flows with a pressure ratio not higher than the critical pressure ratio. From that formula, the flow factor is defined, so that the formula may be applied to a number of gas types using flow factors. The method includes calculating the flow rate Qc of a gas passing through an orifice according to formula Qc=KP1 (K=constant) with a pressure P1 on an upstream side of the orifice set at twice or more higher than pressure P2 on a downstream side, wherein the flow factor FF for each kind of gas is calculated as follows: <paragraph lvl="0"><in-line-formula>FF=(k/gammas){2/(kappa+1)}1/(kappa-1)[kappa/{(kappa+1)R}]½</in-line-formula>and wherein, if the calculated flow rate of gas type A is QA, and, when gas type B is allowed to flow through the same orifice under the same pressure on the upstream side and at the same temperature on the upstream side, the flow rate QB is calculated as follows: <paragraph lvl="0"><in-line-formula>QB=(FFB/FFA)QA </in-line-formula>where gammas=concentration of gas in standard state; kappa=ratio of specific heat of gas; R=constant of gas; K=proportional constant not depending on the type of gas; FFA=flow factor of gas type A; and FFB=flow factor of gas type B.

A solar light (heat) absorption material is provided which has an excellent solar light (heat) absorbing ability and a simple structure, and may be usable as a low-cost and high-performance heat absorption/accumulation material, the inventive material being usable also as a solar light (heat) absorption/control building component that allows easy change of its solar light (heat) absorption/control ability. The material comprises particles dispersed into a liquid medium having a specific heat ranging from 0.4 to 1.4 cal/g/° C. and a melting point of 5° C. or lower. The dispersed particles have L*value of 30 or less as determined by the CIE-Lab color system (light source D65).

A radiation emitting device of the present invention includes at least one radiation emitter, first and second electrical leads electrically coupled to the radiation emitter, and an integral encapsulant configured to encapsulate the radiation emitter and a portion of the first and second electrical leads. The encapsulant has at least a first zone and a second zone, where the second zone exhibits at least one different characteristic from the first zone. Such different characteristics may be a physical, structural, and/or compositional characteristic. Preferably, the at least one different characteristic includes at least one of the following: mechanical strength, thermal conductivity, thermal capacity, coefficient of thermal expansion, specific heat, oxygen and moisture impermeability, adhesion, and transmittance with respect to radiation emitted from the radiation emitter. The radiation emitter may be in a form of an emitter, and is preferably an LED.

Cryogenic refrigeration employs a pulse tube cryo-cooler and a dilution refrigerator to provide very low temperature cooling, for example, to cool superconducting processors. Continuous cryogenic cycle refrigeration may be achieved using multiple adsorption pumps. Various improvements may include multiple distinct thermal-linking points, evaporation pots with cooling structures, and/or one or more gas-gap heat switches which may be integral to an adsorption pump. A reservoir volume may provide pressure relief when the system is warmed above cryogenic temperature, reducing the mass of the system. Additional heat exchangers and/or separate paths for condensation and evaporation may be provided. Multi-channel connectors may be used, and/or connectors formed of a regenerative material with a high specific heat capacity at cryogenic temperature. Flexible PCBs may provide thermal links to components that embody temperature gradients. Various components may be pre-cooled, for example via a switchable thermalization system.

The invention aims at providing an all-organic waterless engine coolant with high storage alkalinity and long service life, which specifically contains the following components by weight percentage: 20-92% of propylene glycol, 0-60% of ethylene glycol, 0.6-5.5% of all-organic corrosion inhibitor, 5-20% of viscosity specific heat conditioning agents, 1.5-5.0% of potential of hydrogen (pH) conditioning agents, 0.01-0.1% of antifoaming agents and 0.001-0.01% of coloring agents. The boiling point of the all-organic waterless engine coolant reaches 180-190 DEG C, the freezing point reaches below -50 DEG C, and the all-organic waterless engine coolant is free of inorganic salt, so that defects of the traditional coolant of being low in boiling point, apt to have electrochemical corrosion and cavitation corrosion, apt to generate scale and the like are overcome, engine power is improved, noise is reduced, and fuel is saved. The all-organic waterless engine coolant has storage alkalinity larger than 25 ml and very long service life, can be used for a life time after being injected for once, does not need to be added with supplement annexing agents (SCA), and is good in market prospect.

The invention provides a method for predicting the internal temperature of a battery in real time, and relates to the real-time prediction methods for the battery. The problem that the actual internal working temperature of the battery can not be embodied by battery surface temperature monitoring is solved. According to the method, the battery is divided into an inner core and an outer shell, temperature prediction models are established respectively, the specific heat capacity of the internal material and the surface material of the battery, the thermal-resistance parameter of the inner core-outer shell of the battery, the thermal-resistance parameter of the outer shell-the outside of the battery, the open-circuit voltage curve of the battery, the curve of the open-circuit voltage variation with temperature and the like are acquired by an experiment method. A Kalman filtering method is used for tracking and correcting the internal temperature of the battery in real time, real-time battery surface and environment temperatures are input into the predication models, and the internal temperature of the battery is predicted in real time. The method is suitable for predicting the internal temperature of the battery in an electrical automobile and an energy storage system.

A heating device includes a low-temperature heat store thermally coupled to a heat pump. The heat store is a buried pocket containing a permeable material and water. A high heat exchange capacity is thus achieved by exploiting both the high specific heat of the water and the high latent heat of liquefaction of the water contained in the heat store.

The invention discloses a method for preparing microcrystalline foam glass by using high titanium blast furnace slag and waste glass powder. The method comprises the following steps: grinding the high titanium blast furnace slag and waste glass powder, uniformly and fully mixing the high titanium blast furnace slag, the waste glass powder, a fluxing agent, a foaming agent and a foam stabilizer, pressing into a block, adding the mixture block into a heating device and preparing the microcrystalline foam glass at a low temperature according to a specific heat treatment process by using a one-step sintering method. According to the characteristic that the high titanium blast furnace slag which is rich in TiO2 can serve as a nucleation agent, the low-melting-point waste glass powder serves as a silicious raw material, a proper amount of corresponding fluxing agent and sintering process are matched, the preparation temperature is greatly reduced, and the preparation can be finished through one-step sintering; and therefore, the energy consumption can be reduced, the process is simplified, the cycle is shortened, the cost is saved, the product which is uniform in cells, moderate in cell diameter, low in volume density, low in water absorption rate, good in thermal insulation effect and high in mechanical strength can be obtained, and the additional value of high titanium blast furnace slag utilization is improved.