2830 results about "Latent heat" patented technology

An electronic device having one or more components that generate heat during operation includes a structure for temperature management and heat dissipation. The structure for temperature management and heat dissipation comprises a heat transfer substrate having a surface that is in thermal communication with the ambient environment and a temperature management material in physical contact with at least a portion of the one or more components of the electronic device and at least a portion of the heat transfer substrate. The temperature management material comprises a polymeric phase change material having a latent heat of at least 5 Joules per gram and a transition temperature between 0° C. and 100° C., and a thermal conductive filler.

The within invention improves on the indirect evaporative cooling method and apparatus by making use of a working fluid that is pre-cooled with and without desiccants before it is passed through a Wet Channel where evaporative fluid is on the walls to take heat and store it in the working fluid as increased latent heat. The heat transfer across the membrane between the Dry Channel and the Wet Channel may have dry, solid desiccant or liquid desiccant and may have perforations, pores or capillary pathways. The evaporative fluid may be water, fuel, or any substance that has the capacity to take heat as latent heat. The Wet Channel or excess cooled fluid is in heat transfer contact with a Product Channel where Product Fluid is cooled without adding any humidity. An alternative embodiment for heat transfer between adjacent channels is with heat pipes.

A method of remediating and recovering energy from combustion products from a fossil fuel power plant having at least one fossil fuel combustion chamber, at least one compressor, at least one turbine, at least one heat exchanger and a source of oxygen. Combustion products including non-condensable gases such as oxygen and nitrogen and condensable vapors such as water vapor and acid gases such as SO_X and NO_X and CO₂ and pollutants are produced and energy is recovered during the remediation which recycles combustion products and adds oxygen to support combustion. The temperature and/or pressure of the combustion products are changed by cooling through heat exchange with thermodynamic working fluids in the power generation cycle and/or compressing and/or heating and/or expanding the combustion products to a temperature/pressure combination below the dew point of at least some of the condensable vapors to condense liquid having some acid gases dissolved and/or entrained and/or directly condense acid gas vapors from the combustion products and to entrain and/or dissolve some of the pollutants while recovering sensible and/or latent heat from the combustion products through heat exchange between the combustion products and thermodynamic working fluids and/or cooling fluids used in the power generating cycle. Then the CO₂, SO₂, and H₂O poor and oxygen enriched remediation stream is sent to an exhaust and/or an air separation unit and/or a turbine.

The invention discloses a ventilation device, which aims to solve the problem that the conventional ventilation device does not have an air adjusting function. The device comprises a pedestal, a high-speed air blower and an annular ejector, wherein the high-speed air blower is arranged at the bottom of the pedestal; the annular ejector is arranged at an air outlet of the high-speed air blower and is fixed on the pedestal; and the air inlet or the air outlet of the high-speed air blower is provided with a vapor generator which is fixed on the pedestal for producing water vapor. In the ventilation device, the water vapor is produced through the vapor generator and is ejected through an atomization nozzle at a high speed to produce fog of smaller granularity, so that a hot air flow can more easily absorb the latent heat of vaporization, and the ventilation device has a humidification effect and a heat absorption and temperature reduction effect on a large amount of hot air sucked by the annular nozzle, and brings comfortable cool air similar to air on the shore of a lake or a sea to the surrounding environment. In the ventilation device, an external circulating device is not required to be mounted, so the cost is low; the space is not required to be closed, so that air convection is guaranteed; and the ventilation device is more energy-saving in the same temperature reduction range compared with a fan and an air conditioner, and can be used conveniently and safely.

A system and process is disclosed for retorting oil shale and extracting shale oil and other hydrocarbons therefrom, in which a cased heat delivery well is drilled generally vertically through an overburden and then through a body of oil shale to be retorted to the bottom thereof, generally horizontally under the body of oil shale to be retorted, and then back to the earth surface. Heat energy is transmitted conductively to the body of oil shale to be retorted from a closed loop heat delivery module in the well, the module comprising a fluid transmission pipe containing a heating fluid heated to at least a retorting temperature. Heat energy is also transmitted to the body of oil shale to be retorted above the fluid transmission pipe by vapor conduits that conduct retort vapors upward through the body of oil shale to be retorted; the ascending retort vapors condense and reflux, delivering their latent heat of vaporization to the body of oil shale to be retorted, and the condensed retort liquids descend. If not recycled, the retort liquids are collected in a sump at the bottom of a production well and are transmitted to the surface for processing. The vapor conduits communicate at upper ends thereof with the production well, so that vapors that do not reflux are collected in the production well and are transmitted to the surface for processing.

Devices and methods to heat and cool human beings, including inducing and maintaining hypothermia in human patients. Methods include inducing hypothermia to treat ischemic events, including heart attack and stroke, to limit damage caused by the ischemic event. Methods can include: using the lungs for heat exchange; using cooled gases for ventilation; using helium in the ventilation gas mixture, using medications to control reflex heat production; and injecting a perfluorocarbon mist into the gas stream to increase the cooling rate. The high thermal conductivity and diffusivity of helium results in greater inspired gas temperature equalization toward body temperature. Due to the latent heat of vaporization, addition of even small quantity of phase-change perfluorocarbon dramatically increases the heat carrying capacity of the respiratory gases. Hypothermia may be terminated by discontinuing the medications and warming the patient using a warmed helium-oxygen mixture.

A latent heat thermal energy storage (LHTES) device for an electric vehicle (EV) comprises a chamber, a plurality of thermal conductivity enhancement units disposed in the chamber, and phase change material (PCM) filled in the chamber, allowing storage of coolness or thermal energy produced when the EV is being charged and retrieval of the coolness or thermal energy when the EV is driven to regulate the temperature of a passenger compartment of the EV. In addition, systems comprising LHTES devices and methods for controlling the same are also introduced.

Cellulosic fibers having enhanced reversible thermal properties and applications of such cellulosic fibers are described. In one embodiment, a cellulosic fiber includes a fiber body including a cellulosic material and a set of microcapsules dispersed in the cellulosic material. The set of microcapsules contain a phase change material having a latent heat of at least 40 J/g and a transition temperature in the range of 0° C. to 100° C., and the phase change material provides thermal regulation based on at least one of absorption and release of the latent heat at the transition temperature. The cellulosic fiber can be formed via a solution spinning process, and can be used in various products where thermal regulating properties are desired.

A method for treating particulate biodegradable organic waste includes sizing the waste and adding a base prior to introducing the waste to a thermal hydrolysis reactor and hydrolyzing the waste at a temperature of about 130° C. or greater and a pressure greater than the saturated water vapor pressure to produce a slurry including solubilized organic material and residual solids. The solubilized organic material is separated from the residual solids using a liquid/solid separator and the solubilized organics are subjected to anaerobic digestion to produce a methane gas. The base is preferably potassium hydroxide (KOH) at a concentration of about 1%. The method may further include preheating the particulate biodegradable organic waste with latent heat of the separated solubilized organic material prior to thermal hydrolysis.

Polymeric composites and methods of manufacturing polymeric composites are described. In one embodiment, a set of microcapsules containing a phase change material are mixed with a dispersing polymeric material to form a first blend. The dispersing polymeric material has a latent heat of at least 40 J/g and a transition temperature in the range of 0° C. to 50° C. The first blend is processed to form a polymeric composite. The polymeric composite can be formed in a variety of shapes, such as pellets, fibers, flakes, sheets, films, rods, and so forth. The polymeric composite can be used as is or incorporated in various articles where a thermal regulating property is desired.

Multi-component fibers having enhanced reversible thermal properties and methods of manufacturing thereof are described. In one embodiment, a multi-component fiber includes a fiber body formed from a set of elongated members, and at least one of the set of elongated members includes a temperature regulating material having a latent heat of at least 40 J/g and a transition temperature in the range of 22° C. to 40° C. The temperature regulating material provides thermal regulation based on at least one of absorption and release of the latent heat at the transition temperature. The multi-component fiber can be formed via a melt spinning process or a solution spinning process and can be used or incorporated in various products where a thermal regulating property is desired. For example, the multi-component fiber can be used in textiles, apparel, footwear, medical products, containers and packagings, buildings, appliances, and other products.

An apparatus for providing two-phase heat transfer for semiconductor devices includes a vapor chamber configured to carry a cooling liquid, the vapor chamber having base section, and a plurality of three-dimensional (3D) shaped members. The plurality of 3D-shaped members have interior and exterior sidewalls, the 3D-shaped members being connected to the base section so that vapor carrying latent heat can reach the respective interior sidewalls and get transferred to the respective exterior sidewalls configured to be in contact with an external coolant. The vapor chamber is configured to be in contact with a semiconductor device in order to remove heat therefrom.

The invention discloses a power battery device with a phase-change material cooling system, which comprises a bolt, a plurality of battery monomers, a box cover venting hole, an electrode connecting shaft, a box body top cover, a side venting hole and a frame body, wherein the battery monomers use batteries as base bodies, a shell is arranged outside the battery monomers, phase-change material is filled between the batteries and the shell and is sealed by insulating rubber; a battery box body is provided with the venting holes for radiating; the power battery device can realize that the temperature of batteries of a power device can be effectively reduced under more rugged thermal environment and can meet the requirement of the balance of temperature distribution among the battery monomers, thereby achieving the best operation condition of the power device, and prolonging the battery service life and improving the power performance of the power device. The adopted phase-change material has larger latent heat of phase-change, perfect phase-change temperature, economic and safe material, and high recycle utilization efficiency.

The invention relates to a medium-high temperature (120-1000 DEG C or higher) composite structural heat storage material. The medium-high temperature composite structural heat storage material comprises an inorganic salt phase change latent heat material, a sensitive heat storage material and a heat conduction reinforcing material, wherein the mass ratio of the inorganic salt phase change latent heat material to the sensitive heat storage material is of 1: (0.1-10); and the heat conduction reinforcing material is of 0.0001-1kg/ (kg heat storage material) based on mass ratio. The preparation method comprises steps as follows: uniformly mixing the inorganic salt phase change latent heat material with the sensitive heat storage material and the heat conduction reinforcing material; pressurizing to form green blank; and then heating and sintering, so as to obtain the medium-high temperature composite structural heat storage material. The medium-high temperature composite structural heat storage material provided by the invention is capable of obviously reducing the corrosion resistance of the sensitive heat storage material; meanwhile, the thermal conductivity of the composite heat storage material is markedly improved by virtue of the micro-nano doping of the heat conduction reinforcing material; and moreover, high heat storage density is achieved, and wide application prospect is provided.

A cooked snack food or cooked edible core material, such as roasted nuts, or baked snack chips, while still hot from the cooking step, is tumbled and sprayed with an aqueous solution of a water-soluble, film-forming coating component, such as a maltodextrin. The tumbling and spraying is performed immediately after cooking so that latent heat from the cooked edible core material, reduces the moisture content of the applied aqueous solution to form a dry, thin film coating of the coating component on the edible core material. The need for a separate, subsequent drying step or forced air drying equipment to reduce the moisture content is eliminated by evaporative cooling of the hot cooked snacks and flashing of the applied aqueous coating solution. The dry, coated cooked snack may be cooled to obtain a snack food having a thin, uniform coating which enhances appearance, texture, taste and shelf life.

A fabric, fiber or article comprising a plurality of fiber bodies, the plurality of fiber bodies including a first fiber material and a second fiber material, wherein the first fiber material comprises a cellulosic material and a phase change material dispersed in the cellulosic material, the phase change material forming a plurality of domains dispersed in the cellulosic material, the phase change material having a latent heat of at least 5 Joules per gram and a transition temperature in the range of 0° C. to 100° C., the phase change material providing thermal regulation based on at least one of absorption and release of the latent heat at the transition temperature. Wherein the second fiber material comprises a fire resistant material.

The invention belongs to the fields of chemical engineering and metallurgy and in particular relates to a process system which adopts a circulating fluid bed to carry out magnetization roasting on limonite, siderite, sedimentary hematite and other refractory iron ore powder bodies. The process system adopts a high-efficiency low-resistance reactor of the circulating fluid bed to carry out the magnetizing roasting to the iron ore powder body; firstly, roasted tail gas in a combustion chamber releases latent heat of unreacted reducing gas through combustion; secondly, the roasted tail gas exchanges heat with the cold iron ore powder body through a multilevel cyclone preheater to reclaim heat; and finally a fluidizing cooler is adopted to reclaim sensible heat of high-temperature roasting ore. The process system has the advantages of high magnetizing roasting efficiency and full heat reclaiming and utilization in the roasting process and the like, can reduce energy consumption of the refractory iron ore powder body in the process of magnetizing roasting and improve the economical efficiency of the refractory iron ore in the process of magnetizing roasting.

An improved cold/compress therapy for the treatment of muscle, tissue, tendon, or cartilage injury or damage. The ICE Power Pack consists of a plurality of hollow vessels filled with water or aqueous solutions or colloids that can be solidified in a conventional domestic or commercial freezer. The encapsulated water or aqueous solutions or colloids rely on the high latent heat of fusion as they undergo a phase change providing an extended therapeutic period in a medically safe temperature zone. The vessels are sandwiched between flexible insulating and non-insulating layers that serve as compresses.