129 results about "Radiative cooling" patented technology

A solar assembly comprising two components: a multi-functional solar collecting apparatus and a mounting embedment integrated with building construction material. The mounting embedment component is affixed to a building frame structure using standard construction techniques and receives the multi-functional solar collecting apparatus that is secured with fasteners. The multi-functional solar collecting apparatus converts solar energy to electrical energy using a photovoltaic grid mounted on a copper plate that provides even temperature dispersion across the plate and acts as a thermal radiator when the apparatus is used as a radiant cooler; and a plurality of interconnected heat transfer tubes located within the apparatus enclosure disposed on the plane below the copper plate but conductively coupled to the copper plate for converting the solar energy to thermal energy in a fluid disposed within the heat transfer tubes.

Polymer-based selective radiative cooling structures are provided which include a selectively emissive layer of a polymer or a polymer matrix composite material. Exemplary selective radiative cooling structures are in the form of a sheet, film or coating. Also provided are methods for removing heat from a body by selective thermal radiation using polymer-based selective radiative cooling structures.

A loudspeaker has an alarm and a luminous element, these being an improvement upon exiting loudspeakers having luminous elements. The luminous element is an illuminating lamp. A radiative cooling fin is mounted near the illuminating lamp. The use of radiator cooling firework permits a larger power light to be selected as the luminous element. This makes the loudspeaker capable of functioning as a substitute light source within an area. Also, the assembly employs an alarm with the loudspeaker. The brighter light emitted by the illuminating lamp on each loudspeaker provides better illumination. The lamp may also flash according to pre-programmed directions for the purpose of indicating a path and thereby helping people to escape from danger. Further, where the external power source fails, the loudspeaker assembly has a built-in emergency power source, ensuring that the loudspeaker and the illuminating lamp can still work normally.

The present invention provides a method and system to overcome and eliminate the effects of condensation contamination of optical surfaces that are induced by radiative cooling. The invention counteracts the effects of radiative cooling on optical surfaces and maintains an optical system within a very tight limit to the ambient temperature by utilizing a resistive heater element that is in contact with the optical components subject to condensation. In thermal contact with this optical component is a solid-state precision temperature sensor. In addition, there is a matching solid-state precision temperature in thermal contact with the ambient air but thermally isolated from the optical element. Signals from these two sensors are applied to a comparator that functions to generate a data signal when the optical surface temperature is less than the ambient or reference temperature. This data signal is used to activate a solid-state power switch that applies a voltage to a resistive heating element. An offset may also be applied to the reference temperature sensor allowing compensation for the thermal resistance of the system comprised of the optical component, optical component attachment heater and temperature sensor.

The combination of an infrared phosphor fluorescing at wavelengths between 8 μm and 13 μm with a wavelength-selective cold mirror glazing transparent to the fluoresced radiation can create a device capable of providing passive radiative cooling in tropical heat and humidity in locations with an unobstructed view of sky. The concentration of thermal radiative energy into the narrow band radiated by the phosphor, and the reflection of infrared radiation outside that band, provides more net cooling through saturation humidity at 37° C. than does a black-body or conventional selective radiator.

Polymer-based selective radiative cooling structures are provided which include a selectively emissive layer of a polymer or a polymer matrix composite material. Exemplary selective radiative cooling structures are in the form of a sheet, film or coating. Also provided are methods for removing heat from a body by selective thermal radiation using polymer-based selective radiative cooling structures.

A kind of floor radiating refrigeration air conditioner includes one cold source machine , which is connected with collecting breeching and pipe coil that is setting under various areas floor through tubing; one cold air machine which leads to various areas through blast pipe and outgoing air pipe; temperature and humidity controlling apparatus arranged on various areas, which are composed of information collecting module, manual imputing module, calculation controlling module, displaying module and dictates outputting module and positioned in a controlling box. Through monitoring indoor temperature, floor temperature, air humidity around floor by sensor, control corresponding area cooling providing amount and wind providing amount depend on the monitored data and request of preventing dewing,

A gas, e.g. hydrogen, at relatively low pressure is directly heated by the fission fragments (FF) emitted by a thin layer of fissile material, e.g. ^242mAm, deposited on the inner wall of a chamber which is kept cooled at a typical temperature of about 1,000/1,500 K. The gas is preferably emitted as capillary flow from the walls of cylindrical tubes. Its temperature progressively increases until it reaches an equilibrium value of the order of 9,500 K, at which point FF heating and radiative cooling balance. With a relatively modest surface power density at the foil of 200 W/cm², the specific, volume-averaged power given to the H gas may be as large as 0.66 MWatt/g. Heating powers up to megawatts for each gram of gas are therefore feasible with acceptable foil surface heating. The gas heating method can be used in rocket engines for deep space propulsion.

The invention discloses a wall automatic heat storage and heat removal device. The device comprises embedded tubes filled with phase change materials used for absorbing heat of a wall, liquid branch tubes, steam branch tubes and a radiation cooling device, wherein working media flow in embedded inner tubes, and accumulated heat can be taken away by the flowing working media; the liquid branch tubes are communicated with one end of each embedded inner tube and used for the liquid working media to flow and enter the embedded inner tubes; the steam branch tubes are communicated with the other ends of the embedded inner tubes, the phase change materials stores and transmits the heat to the liquid working media in the embedded inner tubes, and the liquid working media obtained after heat absorption are heated and then evaporated to be in a gaseous state; the radiation cooling device is communicated with a liquid main tube and a steam main tube separately, and the gaseous working media discharged from the steam main tube enter the radiation cooling device and then are cooled to be in a liquid state and flow into the liquid branch tubes communicated with the radiation cooling device. While the phase change materials are applied, low-grade energy generated by sky background radiation is fully utilized; a wall active heat insulation technology and device are adopted, so that the aims of maintaining the indoor heat comfort and reducing the energy consumption of an air conditioner are achieved.

The related testing technique for nuclear reactor comprises: the upper machine starts up burn-up level measuring program; the fuel element is radiated and cooled; the PLC controls to send the element to lift position with same axis as the collimator and then notify the upper machine for measurement; the high-pure gamma-spectrometer measures the count of 0.661642MeV gamma radioactive ray emitted by 137Cs during decay, and calculates counting rate for the ray to determine whether takes out the core or returns to original core for work, and it sends the measured result to the main control system through a PLC. This invention is not to contact.

The invention discloses a radiative cooling-type seawater desalination device. The radiative cooling-type seawater desalination device comprises an evaporation chamber, a condensation chamber and a communication device, wherein a black heat-absorbing layer is arranged at the bottom of the evaporation chamber, a seawater inlet and a brine outlet are formed in the side surface of the evaporation chamber, and a radiative cooling membrane is arranged on the outer surface of the condensation chamber; and the communication device communicates with the evaporation chamber and the condensation chamber. The invention aims to provide the radiative cooling-type seawater desalination device, and a simple structure, low cost and energy saving and environmental protection are achieved.

A method of producing field emitters having improved brightness and durability relying on the creation of a liquid Taylor cone from electrically conductive materials having high melting points. The method calls for melting the end of a wire substrate with a focused laser beam, while imposing a high positive potential on the material. The resulting molten Taylor cone is subsequently rapidly quenched by cessation of the laser power. Rapid quenching is facilitated in large part by radiative cooling, resulting in structures having characteristics closely matching that of the original liquid Taylor cone. Frozen Taylor cones thus obtained yield desirable tip end forms for field emission sources in electron beam applications. Regeneration of the frozen Taylor cones in-situ is readily accomplished by repeating the initial formation procedures. The high temperature liquid Taylor cones can also be employed as bright ion sources with chemical elements previously considered impractical to implement.

A radiative cooler is provided having a thermally insulated vacuum chamber housing that is configured to support a vacuum level of at least 10^-5 Torr, an infared-transparent window that is sealably disposed on top of the thermally insulated vacuum chamber and is transparet in the range of 8-13 μm, a selective emitter disposed inside the chamber, a mirror cone on the infared-transparent window, a selective emitter inside the chamber and is configured to passively dissipate heat from the earth into outer space through the infared-transparent window and is thermally decoupled from ambient air and solar irradiation but coupled to outer space, a heat exchanger with inlet and outlet pipes disposed below the selective emitter to cool water flowing through the pipe, a sun shade disposed vertically outside the chamber to minimize direct solar irradiation, and a mirror cone to minimize downward atmospheric radiation.

A method of horizontal ribbon growth from a melt includes forming a leading edge of the ribbon using radiative cooling on a surface of the melt, drawing the ribbon in a first direction along the surface of the melt, and removing heat radiated from the melt in a region adjacent the leading edge of the ribbon at a heat removal rate that is greater than a heat flow through the melt into the ribbon.

The invention discloses an incineration boiler for high-concentration salty organic waste liquid. The environment-friendly and energy-saving requirements for harmlessness, reduction and resourcezation of high-concentration salty organic waste liquid are met through high-temperature incineration and waste heat recovery. The incineration boiler structurally and mainly comprises auxiliary combustors, waste liquid spray guns, a thermal insulation hearth combustion chamber, a steering chamber, a radiation cooling chamber, a radiation water-cooling pipe panel, convection current evaporation pipe panels, a steam pocket, a high-temperature economizer, a low-temperature economizer, an ash falling bucket, a flue connection expansion joint and a furnace wall. The thermal insulation hearth combustion chamber is formed by a hearth wall-covering film type water-cooling wall in a defined manner, salty waste liquid is combusted, and recycling is conducted in a salt dissolving tank. High-temperature smoke generated in combustion sequentially enters the thermal insulation combustion steering chamber, a quenching chamber, the multiple stages of convection current evaporation cooling chambers and the economizers to be subjected to heat energy recovery. The incineration boiler has the beneficial effects of being simple in manufacturing process, convenient to maintain, safe and stable in running, and suitable for being used and popularized in high-concentration salty organic waste liquid processing in the industries of chemical engineering, oil refining, papermaking and the like.

A method is described for setting up a system comprising an active medium. The method comprises thermally controlling the system comprising an active medium by radiative cooling. The radiative cooling thereby is based on stimulated and/or coherent Raman scattering processes. In particular embodiments, the thermally controlling may be obtained by tailoring the efficiencies of the Raman scattering processes by optimising at least one of a number of system parameters. The invention furthermore relates to systems thus obtained, to methods for thermally controlling systems comprising an active medium that generate radiation and to computer program products for performing the methods for setting up systems comprising an active medium and thermally controlled by radiative cooling using stimulated and/or coherent Raman scattering processes.

The invention discloses an evaporative cooling air-conditioning system combining a nocturnal radiation cooling technology and a cold-accumulating technology. The vapor cooling air-conditioning system comprises a vapor cooling fresh air unit, a radiator, a high-temperature cooling water unit, a cold-accumulating water tank and a sensible heat terminal which are connected by a pipeline to form a loop, wherein a water collector and a water distributor are arranged to distribute water streams, and a triple valve is arranged in the pipeline to control the direction of the water streams. The vapor cooling air-conditioning system combines an evaporative cooling technology, a nocturnal radiation cooling technology and a cold-accumulating technology, sufficiently uses natural energy sources, reduces environmental pollution and saves energy sources.

The invention relates to a radiative cooling film and a production method and application thereof. The radiative cooling film comprises a radiative cooling layer, a flat and smooth layer and a reflection layer which are sequentially arranged, wherein the radiative cooling layer comprises polylactic resin, cooling particles, a coupling agent and a light stabilizer, the surface, close to one side ofthe flat and smooth layer, of the radiative cooling layer is uneven, the flat and smooth layer and the radiative cooling layer fit closely, and the surface, close to one side of the reflection layer,of the flat and smooth layer is flat and smooth. According to the radiative cooling film and the production method and application thereof, the radiative cooling layer and the flat and smooth layer are produced by means of a casting and co-extrusion technology, and the reflection layer is produced by means of vacuum evaporation aluminizing; and the mean reflectance of the radiative cooling film in all the wave bands of 300-2500 nanometers is equal to or larger than 95%, the infrared emitting ability E in the wave band of 8-13 micrometers is equal to or larger than 92%, radiative cooling powerP in direct sunlight is equal to or larger than 100 W/m<2>, a product has degradation performance, and a degradation rate, measured by soil burial experiment, of the product can reach 69%.

A cooling apparatus for cooling an optical element provided in a vacuum atmosphere includes a radiational cooling part, arranged apart from the optical element, for cooling the optical element by radiation heat transfer, and a controller for controlling temperature of the radiation cooling part.

The invention discloses a waste heat boiler-type gasifier. The gasifier comprises a first gasifier body, a second gasifier body, an upper primary nozzle, and an upper secondary nozzle. A combustion chamber, a first waste heat boiler cooling chamber and a quench chamber are provided inside the first gasifier body. The first waste heat boiler cooling chamber comprises a first radiation cooling chamber, the top end of which communicates with the bottom end of the combustion chamber and the bottom of which is open, and a first convection cooling chamber, the bottom end of which communicates with the bottom end of the first radiation cooling chamber and the upper part of which is provided with an air outlet. A second waste heat boiler cooling chamber is provided inside the second gasifier body, and comprises a second radiation cooling chamber, the top end of which communicates with an air outlet, and a second convection cooling chamber, the bottom end of which communicates with the bottom end of the second radiation cooling chamber. The gasifier is advantaged by higher thermal efficiency, high carbon conversion rate and high gasification efficiency, etc.