498results about "Refrigeration machines" patented technology

A method for cooling an information technology system, comprising: receiving a flow of at least a subcooled liquid phase change refrigerant; cooling the information technology system by sensible heat transfer in an evaporator, to produce at least gaseous refrigerant; and exchanging heat from the at least gaseous refrigerant from the evaporator to the subcooled liquid phase change refrigerant. The phase change refrigerant may be a hydrofluorocarbon ether having a boiling point of 30-65° C. at 1-12 bar.

Passive cooling article (120) includes a plurality of first elements (122) defining a high absorbance in the atmospheric window wavelength range and defining high average reflectance in the solar wavelength range and a plurality of second elements (124) defining a low absorbance in the atmospheric window wavelength range and defining high average reflectance in the solar wavelength range, wherein the plurality of first (122) and second (124) elements are interspersed to form a major structure having a first major surface (130) comprising the first element outer surfaces (126) and the second element outer surfaces (128), wherein the first element outer surfaces (126) face a first direction toward a first end region (136) of the major structure (130) and the second element outer surfaces (128) face a second direction toward a second end region (136) of the major structure. The article (120) may be applied to a substrate (104), for example, on a generally vertical surface of a vehicle or stationary structure.

The invention relates to a photovoltaic heat dissipation enhanced radiation refrigeration cement-based composite material as well as a preparation method and application thereof. The composite material comprises white Portland cement, radiation refrigeration particles and water, the radiation refrigeration particles comprise alpha aluminum oxide and barium sulfate, the mass fraction of the radiation refrigeration particles relative to the total solid content in the composite material is 30%-60%, and the mass ratio of the alpha aluminum oxide to the barium sulfate is 1: 1-2: 1; the average particle size of the radiation refrigeration particles is 0.3-10 [mu] m; the mass fraction of the white Portland cement relative to the total solid content in the composite material is 40-70%. Compared with the prior art, the reflectivity and emissivity of the material are improved, efficient photovoltaic thermal management is achieved, meanwhile, the material has the advantages of being low in cost, simple in process, high in stability and the like, development of the building photovoltaic integrated technology is expected to be promoted, and the energy utilization efficiency is improved.

The invention relates to a high-reflectivity high-entropy rare earth phosphate radiation refrigeration pigment, the high-entropy rare earth phosphate radiation refrigeration pigment has a monazite phase with a monoclinic system structure, the chemical formula of the pigment is (A1xA2yA3zA4uA5v) PO4, A1, A2, A3, A4 and A5 are any five rare earth cations of La, Ce, Yb, Gd, Nd and Eu, the cations are in an equimolar ratio, and x, y, z, u and v meet the condition that x + y + z + u + v = 2. Meanwhile, the invention also discloses a preparation method of the high-entropy rare earth phosphate radiation refrigeration pigment. The high-entropy rare earth phosphate radiation refrigeration pigment has high infrared emissivity in air, the emissivity reaches 0.90 or above within the wave band of 8-13 microns, the solar reflectivity reaches 0.93 or above within the wave band of 0.3-2.5 microns, and the high-entropy rare earth phosphate radiation refrigeration pigment has wide application prospects in the fields of building energy conservation, urban heat island effect reduction, photovoltaic power generation efficiency improvement and the like.

The invention discloses a preparation method and application of a PLA (polylactic acid) / PTFE (polytetrafluoroethylene) radiation refrigeration composite film based on an electrostatic spinning method, and belongs to the field of radiation refrigeration materials. And preparing the polymer radiation composite fiber membrane by adopting an electrostatic spinning technology. The obtained micro-nano size fiber film has a porous structure, can realize a strong Mie scattering effect on solar wavelength, improves the solar reflectivity of the radiation film, and realizes the reflectivity of 85% or above within the wavelength of 400-1400 nm and the relatively high infrared emissivity of 90% within the wavelength of 8-13 [mu] m. The radiation cooling composite film has great application potential value in the field of low-temperature grain storage.

An atomic object confined in a particular region of an atomic object confinement apparatus is cooled using an S-to-P-to-D EIT cooling operation. A controller associated with the atomic object confinement apparatus controls first and second manipulation sources to respectively provide first and second manipulation signals to the particular region. The first manipulation signal is characterized by a first wavelength corresponding to a transition between an S manifold and a P manifold of a first component of the atomic object and detuned from the S-to-P transition by a first detuning. The second manipulation signal is characterized by a second wavelength corresponding to a transition between the P manifold and a D manifold of the first component and detuned from the P-to-D transition by a second detuning. The first and second detunings selected to establish a dark state associated with a two-photon transition between the S manifold and the D manifold.

The invention discloses a Janus type flexible radiation refrigeration material and a preparation method thereof.The Janus type flexible radiation refrigeration material is characterized in that a modified radiation refrigeration layer and a functional layer are arranged on the upper surface and the lower surface of a substrate fiber layer with specific functional groups, and on one hand, the substrate fiber layer can be subjected to esterification or silanization bonding with the amino silane modified radiation refrigeration layer; the material can be subjected to an esterification reaction with a carboxylation modified functional layer, so that the three-layer material interface is chemically bonded, the bonding force of the interface is effectively improved, the dynamic stability is effectively improved on the basis of ensuring the optical performance and the mechanical flexibility, and the application of the radiation refrigeration material is promoted.

The invention belongs to the technical field of thermoelastic refrigeration alloy materials and preparation processes of alloys of the thermoelastic refrigeration alloy materials. The material can obtain remarkable adiabatic temperature change near the room temperature, and is an ideal near-room-temperature elastic heat refrigerating working medium. The chemical formula of the Ni-Mn-Ti-Si elastic thermal refrigeration alloy material is Ni < 50-x > Mn < 3 2.5-y > Ti < 17.5 + y > Si < x >, the sum of mole numbers of elements in the alloy is 100, x is larger than or equal to 1 and smaller than or equal to 4, and y is larger than or equal to 0 and smaller than or equal to 2.5. According to the preparation method, the Ni-Mn-Ti-Si elastic thermal refrigeration alloy block blank is prepared through raw material proportioning, vacuum arc repeated smelting, polycrystalline cast ingot preparation, annealing under the protection of high-purity inert gas and then rapid water cooling. Under the action of external stress, the adiabatic temperature change range of the alloy block ranges from 2.4 K to 15.1 K, and the adiabatic temperature change range ranges from-2.0 K to-14.8 K.

The present application relates to a kind of photovoltaic direct-drive air source injection-compression combined cycle heat pump cogeneration system, the system includes refrigerant system, hot water system, power generation / power supply system, by compressor, check valve, hot water heat exchanger, two-phase ejector, gas-liquid separator, electronic expansion valve, intermediate cooler, finned heat exchanger, water pump, photovoltaic array, direct-current converter, AC / DC inverter is formed, system can realize cogeneration.The present application introduces injection refrigeration technology into air source heat pump technology, to reduce the throttling loss and overheating loss of traditional vapor compression cycle process, improve system performance;While using the method of low injection rate to supercool finned heat exchanger inlet refrigerant, the uniformity of finned heat exchanger refrigerant distribution is guaranteed, and its heat exchange efficiency is improved.The present application makes full use of renewable energy solar energy and air energy, realizes electric energy self-production, energy saving, efficient, green, low carbon.

The electrochromism, photochromism and radiation refrigeration coupled intelligent window device comprises a color changing module, a radiation refrigeration module, two glass substrates and a controller module, the color changing module comprises an electrochromic module, an electrochromic-photochromic coupling color changing module and a conductive diaphragm. On the basis of relatively independently controlling the visible light transmittance and the near-infrared transmittance based on electrochromism, the external illumination intensity is perceived through photochromism, the light transmittance is adaptively reduced, the problem that a traditional intelligent window is single in regulation and control mode and control strategy is solved, and the control effect is improved. Efficient control over the indoor environment through the intelligent window in the complex environment is effectively achieved; effective combination of the dimming glass and the radiation refrigeration technology is achieved, the problems that the temperature of the glass is high and heat is transferred indoors under the conditions that the transmittance of the glass is reduced and the absorptivity of the glass is increased are solved, the temperature of the glass is effectively reduced through the radiation refrigeration technology, the energy-saving efficiency is improved, and the service life of the glass is prolonged. And the dual requirements of a user on energy conservation and a comfortable environment are met.

The invention discloses a humidity response discoloration radiation refrigeration material which comprises a scattering layer and an iridescent photon film arranged on the surface of the scattering layer, the iridescent photon film is a cellulose nanocrystal / polyethylene glycol composite film, and the scattering layer is a polylactic acid-silicon dioxide-aluminum oxide composite nanofiber film. Through the composite design of the top cellulose nanocrystal / polyethylene glycol iridescent photon film and the bottom PLA / SiO2 / Al2O3 scattering layer, coupling of color mirror reflection of the color radiation refrigeration function layer constructed by CNC / PEG composite and broadband diffusion response of the electrostatic spinning film reflecting layer is achieved, and the negative effects of moisture absorption and color development on the reflectivity are reduced; color intelligent response and efficient radiation refrigeration are successfully combined; the preparation method is simple in process, the adopted raw materials are all degradable and renewable materials, the cost is low, and industrial popularization and application are easy.

The present invention relates to a cryogenic cooling system and method for particular use in cooling superconducting cables over extended distances, the system and method involving the evaporation of liquid cryogen though an array of spray generators thereby effecting heat transfer utilising the latent heat of vaporisation and optionally through sensible heat transfer in order to provide improved cryogenic cooling over extended distances.

The invention belongs to the technical field of radiation refrigeration, and provides a radiation refrigeration power testing device and method, and the device comprises a testing device main body which comprises a case, and a water-cooling reverse synchronous verification module, a heating constant-temperature power testing module and a synchronous parallel comparison testing module which are disposed in the case; the small meteorological station is independently arranged around the testing device main body, comprises a temperature sensor, a humidity sensor, a wind speed sensor, an atmospheric pressure sensor, a solar irradiance sensor and a wireless transmission module, and is used for monitoring and transmitting environmental parameters in real time; and the monitoring terminal is used for receiving and storing the environment parameters and the test data sent by the wireless transmission module. Compared with the prior art, the water-cooling reverse synchronous verification module and the heating constant-temperature power test module are introduced, so that the accuracy of a test result can be verified in real time, active correction is performed through comparison with a theoretical value, and the accuracy of the test result is ensured.

Technology is disclosed for constructing a photonic cooling device for a heat source. In one aspect, a computing unit (i) based on at least one design parameter for an extractor layer of the photonic cooling device, inversely designs a coupler layer in accordance with one or more coupler objectives to define a structure of the coupler layer, (ii) generates a coupler-layer design plan indicative of the structure of the coupler layer that facilitates its fabrication, (iii) based on the at least one extractor-layer design parameter, inversely designs a back-reflector layer in accordance with one or more back-reflector objectives to define a structure of the back-reflector layer, (iv) generating a back-reflector-layer design plan indicative of the structure of the back-reflector layer that facilitates its fabrication, and (v) causing at least one of the coupler layer or the back-reflector layer to be fabricated in accordance with the corresponding generated design plan.

The utility model relates to a periodic energy storage heat pump for solar coupling freezing point heat removal, which belongs to the technical field of heat pumps and is characterized in that a first heat exchange part and a second heat exchange part are arranged in a solid-liquid phase change energy storage tank, and heat exchange is performed between the first heat exchange part and the second heat exchange part through a medium in the solid-liquid phase change energy storage tank; the two ends of the first heat exchange part communicate with a medium inlet and a medium outlet of the PVT photovoltaic panel correspondingly, and a liquid drainage pipeline and a liquid return pipeline are arranged on the second heat exchange part. Solar energy collects heat into the solid-liquid phase change energy storage tank through the PVT photovoltaic panel in the daytime and serves as a heat source, the PVT photovoltaic panel system stops working at night, the heat pump continues to extract residual heat in the water tank until the heat in the water tank is completely extracted and the phase change water tank is changed into solid ice, heat extraction at the freezing point is achieved, latent heat in the solid phase and the liquid phase is fully utilized, and energy is saved. Heat storage of solar energy is achieved, the part with insufficient heat at night is supplied by the boiler, and the utilization efficiency of the solar energy is improved by 12.2%.

The invention relates to the technical field of desert road cooling, discloses a desert road self-temperature-sensing type spraying cooling system based on radiation refrigeration water supply, and aims to solve the problems that a traditional cooling technology depends on an external water source, water resources are wasted, and accuracy is insufficient. The system comprises a water supply module, a temperature detection module, a data processing module and a spray cooling module, wherein the water supply module is combined with day and night temperature difference condensation through a radiation refrigeration assembly at the top of a guardrail stand column and is led to a water storage assembly for water storage through a road shoulder water guide assembly; the temperature detection module collects pavement temperature through sensors on two sides of a road; the data collector receives temperature data and transmits the temperature data to the temperature judgment system, and the water storage assembly and the spraying assemblies on the two sides of the road are started after high temperature is judged; the spraying assembly sprays water for cooling in a targeted mode. According to the scheme, autonomous supply of water resources and accurate cooling are achieved, the operation safety of the desert road is improved, and resources and cost are saved.

The invention discloses a construction method of a radiation refrigeration film on an outer layer of a concrete retaining structure, which is characterized by comprising the following steps: S1, polishing and filling: polishing a tip bulge on the concrete retaining structure by using an angle grinder, and pouring and leveling by using a silicone adhesive; s2, surface hardening treatment: spraying or roll-coating a surface hardening agent; s3, cleaning: cleaning the surface of the concrete by using a high-pressure water gun after airing; s4, treating the surface by using an interface treating agent: roll-coating the interface treating agent; s5, film pasting is conducted, specifically, a radiation refrigeration film is laid, one side of the radiation refrigeration film is sequentially provided with a pasting adhesive layer and a release protection film from inside to outside, after the release protection film is stripped, the radiation refrigeration film is pasted to the concrete treated in the step S4 through the pasting adhesive layer, the radiation refrigeration film is more smoothly pasted and better bonded, and the radiation refrigeration film is more uniform in thickness and better in adhesion performance. And the coating is not easy to fall off during long-term use.

The utility model relates to the technical field of air conditioners, in particular to a water-cooling cold water and liquid-cooling air conditioning device. Comprising an EC fan, a water coil pipe, two liquid cooling distribution units, a first circulating water pump, a second circulating water pump, a first plate heat exchanger, a second plate heat exchanger, two compressors and an outdoor unit assembly, the input end of the first circulating water pump is connected with the water coil pipe, and the output end of the first circulating water pump is connected with the first plate heat exchanger; each compressor is connected with the first plate heat exchanger and the second plate heat exchanger, the outdoor unit assembly is connected with the first plate heat exchanger and the second plate heat exchanger, and each liquid cooling distribution unit is connected with the outdoor unit assembly, the first plate heat exchanger and the second plate heat exchanger. The input end of the second circulating water pump is connected with the outdoor unit assembly, and the output end of the second circulating water pump is connected with the two liquid cooling distribution units, so that the reliability of operation of the air conditioner in the machine room can be improved, and the energy consumption of the air conditioner is greatly reduced.

A cooling device for performing cooling by utilizing latent heat of vaporization without a compressor and is provided with a liquid feeding unit for feeding a refrigerant, an evaporator for evaporating the fed refrigerant, a condenser for condensing the evaporated refrigerant, and a controller for controlling the flow rate of the refrigerant. The controller is configured to determine whether or not dryout has occurred based on the temperature of the evaporator and the refrigerant temperature of the evaporator, the dryout being defined as a state in which a gas-phase refrigerant is in contact with an inner surface of a refrigerant flow path of the evaporator.

The invention relates to the technical field of extremely low temperature refrigeration, and provides a multi-stage parallel flow channel heat exchanger which comprises an outer barrel and an inner barrel which are connected in a sleeving mode and share the same center shaft. A containing cavity is formed between the outer barrel and the inner barrel, and the two ends of the containing cavity are each provided with an end cover; two spiral guide plates which are arranged around the central shaft and have the same rotating direction are also arranged in the accommodating cavity; a runner is formed between the two guide plates; n partition plates which are the same as the flow channels in spiral direction are arranged in each flow channel; and the flow channel is divided into N + 1 parallel sub-flow channels by the N partition plates. In this way, the two spiral flow channels are formed in the containing cavity, and the partition plates are arranged in each flow channel to form the multiple sub-flow channels. Parallel flow heat exchange, multi-stage heat exchange or multi-heat-exchange-surface cross heat exchange of multiple media can be achieved. The heat exchange efficiency and the heat exchange effect are improved, and the method can be applied to various scenes. The invention further provides a dilution refrigerator.

The invention relates to a temperature control device (1) for temperature control of a fluid, comprising: at least one fluid supply (11), at least one fluid discharge (12), and at least one fluid transport element (13), wherein the fluid transport element (13) comprises a drive (131) and at least one fluid conveying element (132) connected to the drive (131), and the drive (131) moves the fluid conveying element (132) as required, wherein the fluid conveying element (132) is in contact with the fluid at least partially, and when the drive (131) is activated, the fluid conveying element (132) transports fluid from the fluid supply (11) to the fluid discharge (12). The fluid conveying element (132) comprises an elastocaloric material at least partially. The invention also relates to a vehicle with a temperature control device (1) and a method for temperature control of a fluid.

To provide an organic Rankine cycle cooling system that can use refrigerant heat in an organic Rankine cycle as a heat source for driving an external combustion engine without requiring heat supply from the outside.SOLUTION: An organic Rankine cycle cooling system 1 cools a cooling object in a circuit that uses an organic material as coolant, wherein the coolant circulates while repeating evaporation and condensation, and the organic Rankine cycle cooling system comprises: a compressor 2 that compresses the coolant to increase the temperature of the coolant; a condenser 5 that cools and condenses the coolant; and an external combustion engine that is provided on the downstream side of the compressor 2 and on the upstream side of the condenser 5. The cooling object is arranged on the downstream side of the condenser 5 and on the upstream side of the compressor 2, and performs heat exchange with the cooled coolant. The external combustion engine operates with the coolant passing through the compressor 2 as a heat source.SELECTED DRAWING: Figure 1

The invention provides an efficient air conditioner refrigeration cycle device with a radiation subcooler, and belongs to the technical field of air conditioner refrigeration. A radiation subcooler is connected to a working medium flowing pipeline between the outlet end of a condenser and the inlet end of an expansion valve in series and used for conducting radiation heat exchange cooling on a high-temperature and high-pressure liquid working medium discharged from the condenser; the radiation subcooler comprises a subcooler shell, wherein the outer surface of the subcooler shell is coated with a high-radiation coating; the working medium heat exchange tube is arranged in the subcooler shell and is distributed in a spiral or snake shape; and the spoiler is of a spiral blade structure, is arranged on the outer wall of the working medium heat exchange tube in a sleeving manner and is tightly attached to the working medium heat exchange tube. The high-temperature and high-pressure liquid working medium flowing out of the condenser is further cooled through radiation heat exchange, so that the supercooling degree of the working medium is remarkably improved, the refrigeration cycle efficiency is improved, and the energy consumption of the air conditioner is effectively reduced.

This invention discloses a direct air-to-water system using heat flow effect coupled with sky radiation cooling, comprising: a heat flow-type water intake device, which includes at least one heat flow-type water intake unit, the heat flow-type water intake unit including a shell, a hot cavity, a cold cavity, and a microchannel assembly; the cold cavity is provided with a cold cavity heat exchanger and a cold cavity drain outlet; an air inlet pipe connected to the cold cavity air inlet; a cold cavity water collection pipe; a sky radiation cooling water collection device, which is provided with a humid air flow channel; the hot cavity exhaust outlet is connected to the inlet at one end of the humid air flow channel; the other end of the humid air flow channel is provided with a condensate outlet and a dry cold air outlet; a dry cold air pipe for introducing dry cold air into the cold cavity heat exchanger; a cooling water collection pipe; and a water collection tank, the cold cavity water collection pipe connecting the cold cavity drain outlet to the water collection tank, and the cooling water collection pipe connecting the condensate outlet to the water collection tank. The water intake system using this invention is unaffected by air humidity and can utilize renewable energy to obtain fresh water from the air.

The refrigerator comprises a refrigerator shell, a generator is installed on the side wall of the back of the refrigerator shell, a semiconductor chilling plate is fixedly connected to the top of the refrigerator shell, and the cold end face of the bottom of the semiconductor chilling plate extends into a condensation pipe; a liquid cooling head is arranged on the hot end face of the top of the semiconductor chilling plate, a first heat conduction pipe is fixedly connected to the side wall of the liquid cooling head, one end of the first heat conduction pipe extends into the generator and is fixedly connected with a second heat conduction pipe, and the liquid cooling head, the first heat conduction pipe and the second heat conduction pipe are all filled with heat conduction liquid. Absorption type circulation is driven by waste heat at the hot end of the semiconductor chilling plate, direct heat exchange at the cold end is combined, efficient coupling of a thermoelectric refrigeration part and an absorption type refrigeration part is achieved, waste heat is effectively utilized, and energy consumption is reduced.

The application discloses a low-grade heat energy recycling refrigeration and power generation integrated system and a working method thereof. The system comprises a heat energy-mechanical energy conversion unit, an elastic heat refrigeration unit, a power generation energy storage and driving unit, a mode switching mechanism and a system control module. The heat energy-mechanical energy conversion unit is used for converting low-grade heat energy into reciprocating mechanical work; the elastic heat refrigeration unit is used for generating a refrigeration effect by using mechanical energy; the power generation energy storage and driving unit is used for converting mechanical energy into electrical energy storage and converting the electrical energy into mechanical energy output; the mode switching mechanism is used for realizing coupling and disconnection among the mechanisms; and the system control module is used for controlling the running state and mode switching of each executing mechanism. The application realizes efficient step-by-step utilization of low-grade heat energy by integrating the above executing mechanisms and flexibly switching three working modes. Moreover, all auxiliary equipment is driven by the electrical energy generated by the system itself, without external power grid input, so that off-grid independent operation is realized.

The present prevention provides a surface coating for cooling a surface by light scattering comprising a plurality of successive layers, each of the layers may be comprised of a plurality of spheres arranged to form a structure comprised of packed spheres. Each layer may have a different arrangement of packed spheres to create to a different light scattering property in each of the layers. The coating of the structures may also be formed by randomly packed spheres and the spheres may have a uniform diameter.

The application discloses an aluminum phosphate powder material with radiation refrigeration performance and a preparation method thereof. The method comprises the following steps: step 1, according to the molar ratio of aluminum ions, phosphate ions and ethylene glycol 2:(1-4):(10-20), aluminum hydroxide, ammonium phosphate and ethylene glycol are weighed, the aluminum hydroxide and the ammonium phosphate are mixed and then put into a mortar, the ethylene glycol is added into the mortar, and after being fully ground, the mixture A is obtained through filtration and washing; step 2, the mixture A is put into a crucible and placed in a muffle furnace, the temperature is first raised from room temperature to 200-280 DEG C at a temperature rising rate of 3-5 DEG C / min, and then raised to 1000-1200 DEG C at a temperature rising rate of 5-8 DEG C / min, and the temperature is kept for 2-4 h to obtain the product B; and step 3, the product B is ground in a mortar, sieved and the aluminum phosphate powder material is obtained. The aluminum phosphate powder material prepared by the method has excellent radiation refrigeration performance.

The invention discloses a laser-constructed aluminum-based dual-mode heat regulator and application thereof. The aluminum-based dual-mode heat regulator comprises an aluminum base; one side of the aluminum base is provided with a passive radiation cooling layer, and the other side is provided with a solar heating layer; the passive radiation cooling layer comprises a laser constructed aluminum oxide layer and a hydrophobic-emission enhancement layer above the aluminum oxide layer; and the solar heating layer comprises a black aluminum layer constructed by laser and a hydrophobic layer arranged above the black aluminum layer. According to the invention, Al2O3 and black Al nanoparticles are directly assembled on an Al sheet as a dual-mode functional layer through laser surface direct writing (LSDW), and then a hydrophobic material is sprayed as a self-cleaning layer. The inherent high thermal conductivity of the Al sheet is beneficial to efficient heat exchange between the functional surface and the target building, and effective temperature adjustment is achieved. The passive radiation cooling function and the solar heating function are integrated in one device, and cooling and heating can be easily achieved according to seasonal changes.