95 results about "Passive cooling" patented technology

A composite material for passive cooling includes a porous structure including an expanded graphite and a surfactant, the porous structure being provided with at least one crystalline deliquescent salt that is selected from the group consisting of chloride, bromide, sulphate, and nitrate. The uses of the composite material in passive cooling are also addressed.

The invention belongs to the technical field of building construction, and particularly provides a device for cooling concrete coarse aggregate by using cooling water, which comprises an aggregate storage bin, a temperature sensor, a weight sensor and a control unit, the top of the aggregate storage bin is provided with a water inlet and a feed inlet, the bottom of the aggregate storage bin is communicated with a water collecting device, and a water filter screen and a baffle are mounted in the aggregate storage bin; temperature sensors are mounted in the water inlet, the feed port and the water collecting device, weight sensors are mounted on the baffle and in the water collecting device, and the control unit comprises a heat exchange kinetic model and a water content calculation model. The concrete aggregate cooling device can conveniently cool concrete aggregate, can measure aggregate delivery temperature and moisture content data, realizes conversion from passive cooling to predictive intelligent control, effectively controls concrete mold entering temperature, reduces cracks caused by hydration heat, and improves mass concrete construction quality and structural safety. The invention also provides an operation method of the device for cooling the concrete coarse aggregate by using the cooling water.

Methods and systems for managing cooling of a data processing system. In particular, active cooling using a fan controlled by an embedded controller is provided in a data processing system having components from a thermal architecture that is only capable of providing passive cooling through throttling of a motherboard of the data processing system. The thermal architecture is based on a passive cooling thermal architecture of a computing device without the capacity to include the fan and the embedded controller, and the motherboard is one of the components of the thermal architecture.

The invention discloses a preparation method of an h-BN / BMSC daytime radiation refrigeration material, which comprises the following steps: (1) blending 39.9-66.5 parts by mass of few-layer h-BN nanosheets and 133 parts by mass of light calcined magnesia, and slowly stirring to obtain a mixed material; (2) dispersing an additive into 61 parts by mass of a magnesium sulfate heptahydrate solution, uniformly mixing, adding into the mixed material in the step (1), and stirring at a high speed to obtain slurry; and (3) putting the slurry obtained in the step (2) into a mold, and curing at room temperature to obtain the few-layer h-BN / BMSC composite material. The prepared gelling-based composite material has good radiation cooling performance and heat dissipation performance in an outdoor high-temperature environment, and can be used as a radiation cooling heat dissipation material with the temperature higher than the environment temperature. The passive cooling heat dissipation plate has important significance in improving the working efficiency of outdoor electronic equipment in a high-temperature environment, prolonging the service life and guaranteeing the reliability of a system.

This application provides a layered, environmentally friendly waterborne radiative cooling coating composition, belonging to the field of radiative cooling. The coating composition includes a waterborne radiative cooling primer, a topcoat, and a clear coat. The primer comprises 20-50 parts of a first waterborne emulsion, 10-20 parts of a narrow bandgap optical scatterer, and 10-20 parts of a wide bandgap optical scatterer. The topcoat comprises 20-50 parts of a second waterborne emulsion and 30-60 parts of a wide bandgap optical scatterer. The clear coat comprises 20-50 parts of a third waterborne emulsion. This coating utilizes a synergistic layering of primer / topcoat / clear coat and optimized wide bandgap filler gradation to achieve high solar reflectivity and mid-infrared emissivity at a thinner film thickness, resulting in significant passive cooling. The all-waterborne system disperses and dries at room temperature, resulting in low energy consumption and no VOC risk. The layered structure enhances adhesion, weather resistance, and self-cleaning properties. Compared to high-filler thick-coating processes, this application saves raw materials, energy consumption, and construction steps, extends maintenance cycles, and reduces total life-cycle costs.

A passively-cooled personal computer includes a housing, a motherboard disposed within the housing, a central processing unit (CPU) mounted on the motherboard, and a passive cooler thermally coupled to the CPU. The passive cooler includes a plurality of heat pipes and at least one set of stacked fins. The heat pipes extend through the fins and transport heat from the CPU to the fins. The set of stacked fins has a large cross-section in a horizontal plane and a small cross-section in a vertical plane.

The invention discloses a solid waste-based micro-nano radiation cooling coating and a preparation method thereof.The preparation method comprises the steps that fly ash and coal gangue serve as main solid waste raw materials, and after being subjected to ultra-fining and silane modification, the main solid waste raw materials and a phosphate exciting agent are subjected to chemical action to form an inorganic micro-nano gel matrix; nano-silica (SiO2) and barium sulfate (BaSO4) are cooperatively introduced as a spectrum regulation functional filler, and a multi-scale scattering structure and an intermediate infrared radiation channel are constructed, so that the radiation cooling effect of high solar reflectivity and high infrared emissivity is realized. The prepared coating has excellent spectral selectivity (the solar reflectivity is larger than or equal to 0.88, and the mid-infrared emissivity is larger than or equal to 0.95), high weather resistance (the 500-hour ultraviolet aging retention rate is larger than or equal to 95%) and remarkable passive cooling capacity (the temperature drop can reach 5-8 DEG C). The raw materials are wide in source, the preparation process is simple, a large amount of building solid waste or industrial solid waste can be utilized, the low-cost and high-performance green radiation cooling coating is achieved, and a technical path capable of being popularized on a large scale is provided for building outer wall energy-saving transformation and urban heat island relieving.

This invention relates to the field of heat dissipation airflow mesh technology, and provides an airflow mesh for passive airflow cooling, including a pipe assembly, a clamping assembly, and an adjusting assembly. The pipe assembly includes a main pipe, a secondary pipe, an adjusting pipe, a vertical plate, and a horizontal plate. The clamping assembly, sleeved on the outer wall of the adjusting pipe, includes a fixed plate, a movable part, a rotating plate, and a support block. The adjusting assembly is located at one end of the main pipe and inside the main and secondary pipes, and includes a motor, a rotating shaft located at the output end of the motor, a drive bevel gear sleeved on the end of the rotating shaft away from the motor, a rotating part located on the end of the drive bevel gear away from the rotating shaft, and a spiral part sleeved on the rotating part. The function of the pipe assembly is to connect traditional heat dissipation pipes in sections, and through the combined effect of the septum effect and Bernoulli's principle, to compress the gaseous working fluid and release heat, which is conducted away through the metal thermally conductive material, thereby reducing the temperature of the airflow after it passes through by approximately 50 watts / m² / m / s.

The invention discloses an energy-saving air conditioning system for a building. The energy-saving air conditioning system comprises a ventilation shaft, a tunnel air pipe, a TLambert wall, a sky radiation layer and a heat storage layer. The heat storage layer is arranged at the top of the ventilation shaft; the TLambert wall is arranged on the sunny side of the ventilation shaft and is relatively close to the top of the ventilation shaft; the sky radiation layer is arranged on the shady side of the ventilation shaft and is relatively close to the bottom of the ventilation shaft; the tunnel air pipe is used for being communicated with or disconnected from the bottom of the ventilation shaft so that temperature difference can be formed in the ventilation shaft and air can be driven to flow from bottom to top. A condensation face is arranged in the ventilation shaft, and the condensation face is located on an air flowing path and used for dehumidifying air. A coupled passive cooling and dehumidifying building energy-saving air conditioning system is formed by tunnel air, sky radiation, a Tembert wall, phase change heat storage and a condensing surface, and the cooling and dehumidifying effects can be achieved by completely depending on renewable low-grade natural energy without mechanical driving such as a fan or a compressor.

The invention discloses a radiation refrigeration material based on evaporative cooling synergistic enhancement and a preparation method and application thereof.The material comprises a radiation refrigeration layer, a moisture power generation layer and a base material supporting layer, and integration of three passive cooling and energy collection functions of passive refrigeration, evaporative cooling and moisture power generation is achieved on fabric; the limitation that all functions exist independently and are difficult to cooperate in the prior art is broken through, the three functions are organically combined and synergistically interacted on the same fabric platform, a complete energy closed-loop system of passive cooling, energy collection and active adjustment / sensing is achieved, energy circulation of the environment and the human body is completely relied on, and the energy utilization rate is improved. And a brand-new functional solution is provided for the wearable device.

The invention relates to the technical field of air conditioners, in particular to an air conditioning device with internal air water circulation passive cooling, which comprises an air conditioner, the air conditioner comprises an indoor unit, an outdoor unit and a connecting pipeline, the outer wall of the connecting pipeline is provided with a circulation mechanism, and the outer wall of the indoor unit is provided with a passive cooling mechanism; the circulating mechanism comprises a flow guide pipe fixedly connected into the condensation pipe in the connecting pipeline, a filtering tank is fixedly connected to the end, away from the connecting pipeline, of the outer wall of the flow guide pipe, and a piston plate is slidably connected into the filtering tank. The indoor humidity is relatively low, and the requirements of a user cannot be met.

A cooling film for passively cooling modular data centers, power transformers, and other surfaces. The cooling film includes a specular reflective multilayer mirror film attached to a passive cooling heat transfer fin. The anti-fouling layer is secured to the first major surface of the specular reflective multilayer film. The specular reflective multilayer film may include a metal layer and specularly reflects electromagnetic radiation over a majority of wavelengths in the range of 400 nm to 2500 nm. The specular reflective multilayer film may also include a multilayer optical film including a first optical layer and a second optical layer that constructively reflect electromagnetic radiation over a majority of wavelengths in the range of 400 nm to 2500 nm while absorbing electromagnetic radiation over a majority of wavelengths in the range of 4000 nm to 20000 nm.

busbar (100), wherein the busbar (100) forms a receptacle (102) for a cooling cell (104) and the cooling cell (104) is arranged in the receptacle (102), wherein the receptacle (102) is configured to thermally couple the cooling cell (104) to the busbar (100), wherein a heat storage medium (300) is arranged in an interior space (208) of the cooling cell (104) and the cooling cell (104) is configured to passively temperature control the busbar (100), wherein the heat storage medium (300) incompletely fills the interior space (208), wherein a remaining volume of the interior space (208) is filled with a noble gas (304).

The present disclosure provides a radiative cooling article including a white diffusely reflective microporous layer and a non-white color reflective mirror film having first and second optical layers. The white diffusely reflective microporous layer has a solar weighted reflectivity at normal incidence of electromagnetic radiation over a majority of wavelengths in a range of 350 nanometers (nm) to 2500 nm of 0.8 or greater, 0.85, 0.9, or 0.95 or greater. The non-white color reflective film is disposed adjacent to a major surface of the white diffusely reflective microporous layer and the non-white color reflective film reflects a wavelength bandwidth of at least 30 nm within a wavelength range of 350 nm to 700 nm. The non-white color reflective film can be tuned to reflect light of a specific color (e.g., blue light, green light, or red light). The radiative cooling article may be useful for applications including commercial graphics located outdoors (e.g., on vehicles or buildings). The present disclosure further provides a composite cooling article including the radiative cooling article attached to a vehicle or a trailer. Also, the present disclosure provides a multi-surface passive cooling article including first and second elements in which at least one of the elements includes the radiative cooling article.

The present invention relates to a cooling assembly comprising an evaporator containing a primary cooling medium, a passive condenser, a heat exchanger, and a flow control valve controlling the flow of the primary cooling medium into the evaporator. When a secondary cooling medium is provided to the heat exchanger, the primary cooling medium in the gas phase switches from being received by the passive condenser to the heat exchanger without operating any valves located between the evaporator and the passive condenser and between the evaporator and the heat exchanger. The primary cooling medium circulates between the evaporator and the passive condenser and between the evaporator and the heat exchanger by natural circulation and gravity without the need to provide a pump in the flow path of the primary cooling medium between the heat exchanger and the evaporator and between the passive condenser and the evaporator to circulate the primary cooling medium.

A modular power processing system for renewable energy applications includes rack-supported power processing modules with power conversion circuitry for AC / DC and / or DC / DC conversion. Each module can include top and bottom connectors that self-align and engage to establish electrical communication, with optional locking mechanisms to prevent disconnection. Connector covers can be included to protect exposed connectors. The system can include an endpoint module for external electrical connections and supports both active and passive cooling elements. Electrical communication between modules can transmit power and data. Modules are designed for tool-less addition or removal, enabling rapid installation and expansion. The system can be used for outdoor use and is scalable, whereby multiple power processing system are connected to each other.

The invention relates to the technical field of photovoltaic, in particular to an energy-saving building assembly type roof photovoltaic power generation system which comprises a base, the top of the base is fixedly connected with an installation box, and the interior of the installation box is fixedly connected with a porous permeable plate and a hollowed-out partition plate in parallel. The interior of the mounting box is divided into an air guide area, a guide area and a heat storage area by the porous permeable plate and the hollow partition plate; the air guide mechanism is arranged in the air guide area; the guide mechanism comprises a perforated plate fixedly connected to the upper end face of the guide area, and the perforated plate is divided into a porous area and a non-porous area. Natural wind is absorbed through energy of the natural wind through the wind guide mechanism, cooling is completed through cooperation with the guide mechanism, cooling of the solar panel during working in the daytime is achieved, passive cooling can be achieved through clean energy without additional energy consumption, the low-carbon requirement of an energy-saving building is met, the working temperature of the solar panel can be effectively reduced, and the energy-saving effect is achieved. And photoelectric conversion efficiency attenuation caused by high temperature is avoided.

The presented invention relates to a conditioning process (100) for conditioning an electrochemical cell system (203). The conditioning process (100) comprises the following process steps: - Arranging (103) the electrochemical cell system (203) on a test bench (200), - Connecting (105) a temperature control circuit (209) of the electrochemical cell system (203) to a temperature control circuit (205) of the test bench (200), - Starting up (107) the electrochemical cell system (203), - Operating (109) the electrochemical cell system (203) for a specified duration at at least one specified operating point on the test bench (200), - Shutdown with active cooling (111) of the electrochemical cell system (203), - Separation (112) of the temperature control circuit (209) of the electrochemical cell system (203) from the temperature control circuit (205) of the test bench (200), - Shutdown with passive cooling (113) of the electrochemical cell system (203), - Dismantling (115) the electrochemical cell system (203) from the test stand (200), during passive cooling of the electrochemical cell system (203) the temperature control medium of the temperature control circuit (205) of the test bench (200) is heated.

An integrated system for solar tracking and DC / DC conversion can include a housing with heat sink fins, a DC power supply configured to receive DC power from one or more solar panels and supply DC power to internal components, and a self-powered controller electrically connected to the DC power supply. The self-powered controller outputs control signals to one or more motors to orient the solar panels. The system further includes a plurality of configurable power blocks that are selectively operable as DC / DC converters to perform maximum power point tracking or as DC / AC converters. A battery module is detachably couplable to the housing by a connector and is electrically connected to the DC power supply to provide backup power. The housing can be formed of a heat-conducting material to enable passive cooling. The battery module can include a seal to prevent ingress of debris and fluids.

This invention discloses a method for preparing and applying a passive cooling material based on lignin-free wood, and its application in promoting the collection of condensate water in a solar-driven interfacial evaporation system. This method, for the first time, combines a PVDF film with lignin-free wood material. Water is drawn upwards through the capillary action of the tubular cellulose structure in the lignin-free wood substrate, and the water evaporates under sunlight, carrying away heat and achieving evaporative cooling. Simultaneously, the high solar reflectivity (89.338%) and high-mid-infrared emissivity (95.783%) of the PVDF film surface provide excellent radiative cooling. Furthermore, the unique low surface energy rough structure of the PVDF film endows it with hydrophobic self-cleaning properties, protecting the surface of the cooling material from contamination, maintaining a stable cooling effect, and enabling long-term application.

The invention provides a sunshade curtain. The sunshade curtain comprises a reflection type passive cooling layer made of reflection type passive cooling fabric and a flame-retardant layer arranged on the outer side of the reflection type passive cooling layer. The reflective passive cooling fabric is formed by weaving fibers; the high-molecular polymer and the inorganic nanoparticles are subjected to melt spinning to obtain the fiber. According to the sunshade curtain, the broad spectrum regulation characteristic and the flame-retardant characteristic of a high polymer material are creatively fused, the defects of a traditional sunshade curtain in the aspects of heat insulation, flame retardance, durability and attractiveness are effectively overcome, and the sunshade curtain can be widely applied to medium-large traffic tools or buildings such as high-speed rails and vehicles and has the excellent cooling performance and the high flame-retardant grade.

A cooling system including an evaporator, a passive condenser, a heat exchanger, and a pump. The passive condenser is arranged in parallel with the heat exchanger relative to the fluid flow of a primary cooling medium. When a secondary cooling medium is provided to the heat exchanger, at least some of a primary cooling medium in the gas phase switches from being received by the passive condenser to the heat exchanger without operating any valves and supplies the primary cooling medium in the liquid phase to the evaporator. When the secondary cooling medium is not provided to the heat exchanger, the heat exchanger does not supply the primary cooling medium in the liquid phase to the evaporator. The pump is located in a liquid line fluidly connecting the evaporator to the passive condenser and the heat exchanger and pumps the primary cooling medium in the liquid phase to the evaporator.

The invention relates to the technical field of concrete pavements, and provides a tough pavement material with passive cooling and pollutant degradation functions and a preparation method thereof.The pavement material comprises white cement clinker, barium sulfate whiskers, carbon nitride hydrogel, calcium chloride and water; the pavement material is prepared from 100-200 parts of white cement clinker, 8-12 parts of barium sulfate whiskers, 250-500 parts of carbon nitride hydrogel, 2-5 parts of calcium chloride and 50-100 parts of water, the prepared pavement material can have the characteristics of high reflection, high infrared emission, pollutant adsorption and the like, the practicability of the pavement material is improved, and the urban heat island effect, pollutant absorption and the like can be better solved.

This invention relates to the field of bridge technology and provides a design method for a passive cooling system for cables. The method involves obtaining the fire heat flux density acting on the outer surface of the cable's protective layer, using this fire heat flux density as a heat input benchmark to determine the thermal configuration design parameters of the phase change material layer and the heat dissipation configuration design parameters of the thermosiphon cycle. A comprehensive thermal verification is then performed by combining the fire heat flux density, design buffer time, and the critical failure temperature of the cable material to determine the first dimensional design parameters related to the phase change material layer and the second dimensional design parameters related to the condensation section. These first and second dimensional design parameters are then used as the system design result. This application enables active and efficient cooling that is completely independent of external energy and control. It can self-sense and self-start when a fire occurs and continuously provide protection for the cable using its own physical mechanisms, thereby bridging the technological gap between passive delay and complex active cooling.

The application discloses a building energy-saving air conditioning system, which comprises a ventilation shaft, an underground air pipe, a Trombe wall, a sky radiation layer and a heat storage layer; the heat storage layer is arranged at the top of the ventilation shaft; the Trombe wall is arranged at the sunny side of the ventilation shaft and is arranged close to the top of the ventilation shaft; the sky radiation layer is arranged at the shady side of the ventilation shaft and is arranged close to the bottom of the ventilation shaft; the underground air pipe is used for being communicated with or being cut off from the bottom of the ventilation shaft, so that the inside of the ventilation shaft can form a temperature difference and drive air to flow from bottom to top; a condensing surface is arranged in the ventilation shaft and is located on an air flow path, so as to dehumidify the air. The building energy-saving air conditioning system is coupled with passive cooling and dehumidification and is composed of the underground air pipe, the sky radiation, the Trombe wall, the phase change heat storage and the condensing surface, and can realize the effects of cooling and dehumidification by relying on renewable low-grade natural energy without the mechanical driving of a fan or a compressor.

This invention discloses a high-fullness waterborne polyurethane radiation-cooling coating and its preparation method, belonging to the field of coating technology. This invention employs a multi-scale cross-linked network waterborne polyurethane resin, radiation-cooling functional pigments and fillers, and radiation-cooling functional modified isocyanate curing agents. It solves the problems of unstable cooling performance, incompatibility between gloss and radiation-cooling performance, poor overall mechanical properties, and insufficient resistance to acids, alkalis, salt spray, and UV aging in existing radiation-cooling waterborne polyurethane coatings. It is suitable for applications such as building exteriors, industrial equipment casings, and transportation vehicle surfaces that require passive cooling, energy saving, and high overall coating performance.

The application discloses a kind of photovoltaic power generation passive cooling method, it is characterized in that, using the evaporation of cooling liquid carries away the heat of photovoltaic panel to the entrance below wind cylinder, then collects and utilizes solar energy to heat the position above wind cylinder entrance, so that the ascending air flow is formed in wind cylinder, and the heat of photovoltaic panel sent to the entrance of wind cylinder is carried away by relying on ascending air flow, to realize the cooling of photovoltaic panel.The application makes full use of transpiration effect generated by solar heating to realize air cooling of photovoltaic power generation unit, and further realizes passive cooling of photovoltaic power generation unit.It has the characteristics of high solar energy utilization efficiency and good cooling effect.

The invention relates to the technical field of industrial and agricultural production energy-saving operation optimization, and discloses a wind energy recovery-based seasonal self-adaptive energy-saving operation method for a cooling triangle of an indirect cooling tower, which is applied to an indirect cooling tower system provided with a wind energy recovery device and a cooling triangle with an adjustable structure, and comprises the following steps: S1, multi-source data acquisition and fusion processing; s2, identifying a seasonal self-adaptive operation mode; and S3, target operation parameters are generated cooperatively. The seasonal self-adaptive operation of the indirect cooling tower is realized by dynamically identifying a summer and winter dual-operation mode: in summer, cooling triangle and wind energy recovery device parameters are collaboratively optimized, heat dissipation is improved, and back pressure is reduced; wind energy is recycled to the maximum in winter for power generation; and on the basis of self-adaptive sliding mode control of a structure working condition coupling factor and fusion equipment dynamics, the robustness and stability of the system are enhanced, a wind energy recovery device is upgraded into dual-function equipment, passive cooling of the indirect cooling tower is converted into active energy utilization, and the comprehensive energy efficiency, the economic value and the social benefit are remarkably improved.

The invention relates to the technical field of fluid machinery, in particular to a centrifugal pump impeller of an integrated phase change material passive heat management structure, which comprises a passive cooling assembly arranged on a rear cover plate of the impeller, and the passive cooling assembly is used for passively cooling the rear cover plate; the passive cooling assembly comprises a plurality of closed cavities formed in the rear cover plate, and a plurality of radial straight fins arranged at equal intervals in the circumferential direction are arranged on the inner walls of the closed cavities. The closed cavity is filled with phase change materials, and the phase change materials make contact with the outer walls of the radial straight fins. The phase change material is integrated in the impeller, effective heat management is carried out in the initial stage of heat conduction, temperature changes are quickly responded, heat shock is effectively buffered, source heat protection of a bearing and a sealing system is achieved, and the service life of the bearing and the service life of the sealing system are remarkably prolonged.

The invention belongs to the field of radiation cooling materials, and particularly relates to a modified inorganic filler, a water-based radiation cooling coating containing the inorganic filler, a coating and a preparation method of the coating. The novel inorganic material is prepared by using mesoporous zirconium hydrogen phosphate modified aluminum oxide, the material is simple to add and convenient to use, is applied to a water-based radiation cooling coating system, has high reflectivity, emissivity and contrast ratio, can obviously reduce the consumption of aluminum oxide under the condition of ensuring the same cooling effect, and reduces the cost. Meanwhile, the dispersity of mesoporous zirconium hydrogen phosphate is optimized, long-term stable storage of the coating is facilitated, and the coating is suitable for passive cooling protection scenes in the fields of buildings, traffic, electronic equipment and the like.