48results about How to "Reduce heat radiation loss" patented technology

The invention discloses a spherical cavity type solar heat absorber with an inwardly concave glass cover. The heat absorber is mainly used for collecting sunlight and converting the sunlight into heat energy in a butterfly type solar high-temperature heat utilization system. The heat absorber mainly comprises a heat exchange coil pipe, the inwardly concave glass cover, an outer shell, an inner shell, a vacuum layer, a reflective wind shield and a heat conductive fluid. Different from the traditional opening type heat absorber and the cavity type heat absorber with the glass window at the cavity opening, the cavity type heat absorber disclosed by the invention is the opening type spherical heat absorber with the inwardly concave glass cover, therefore, the cavity type heat absorber not only has the light capturing capacity of the opening cavity type heat absorber but also has low heat loss of the cavity type heat absorber with the glass window at the cavity opening; meanwhile, the cavity type heat absorber is provided with the reflective wind shield, therefore, the capturing on deviated light can be strengthened, and the heat radiation on the inner wall and the convection heat transfer loss resulted from external natural wind can be reduced; and the cavity type heat absorber comprises the vacuum layer between the inner shell and the outer shell, therefore, the lost heat throughthe shells can be effectively reduced.

The invention discloses a solar water purifier based on interface solar photo-thermal conversion, which comprises a solar interface evaporator and a distilled water collector, the solar interface evaporator comprises an open water storage tray and a light absorber with high photo-thermal conversion efficiency, the light absorber is of a double-layer structure and is formed by compounding an upper-layer photo-thermal conversion material and a lower-layer thermal insulation material, and a dust-free cloth is arranged between the upper-layer material and the lower-layer material. During use, it needs to be guaranteed that the dust-free cloth can continuously make contact with the liquid level in a water storage disc, so that it is guaranteed that enough water is conveyed to the surface of thelight absorber to guarantee continuous evaporation. Only solar energy is used as driving energy, other energy sources are not consumed, meanwhile, the problem of replacement of a filter element of aconventional water purifier is avoided, and the device has the advantages of being portable, low in price, high in water purification efficiency and the like and can be stably applied to seawater desalination, sewage treatment and outdoor drinking water purification for a long time.

A refrigeration apparatus includes a compression mechanism, a heat source-side heat exchanger, a usage-side heat exchanger and an intercooler. The compression mechanism has compression elements arranged so that refrigerant discharged from a first-stage compression element is sequentially compressed by a second-stage compression element. The intercooler is connected to an intermediate refrigerant tube arranged and configured to draw refrigerant discharged from the first-stage compression element into the second-stage compression element. The intercooler is arranged and configured to cool the refrigerant discharged from the first-stage compression element and drawn into the second-stage compression element. The intercooler and the intermediate refrigerant tube and are arranged and configured to perform wet prevention control when a heat source temperature of the intercooler or an outlet refrigerant temperature of the intercooler is equal to or less than a saturation temperature of the refrigerant fed from the first-stage compression element to the second-stage compression element.

The invention discloses an energy-saving cooking range. The energy-saving cooking range is characterized by comprising a cooking range body and a burning board. The cooking range body is provided with a spiral gas channel. The top end of the gas channel is opened. The burning board is arranged at the opening of the gas channel to seal the gas channel. The gas channel is divided into layers of circular channels communicated from outside to inside. The cooking range body is provided with a gas lead pipe for leading an external gas source into the gas channel. The energy-saving cooking range has the beneficial effects that the path of gas can be better enhanced through the spiral gas channel, so that the gas which is directly jetted and vertically combusted formerly is combusted after being adequately mixed in a gas pipeline. As gas flows in the gas pipeline, the flame is closer to the burning board so that the heat radiating loss is reduced, and the heating effect is better.

The invention relates to the technical field of solar energy and discloses a solar selective absorbing coating. The solar selective absorbing coating comprises a metallic reflective layer and a semiconductor absorption layer formed on the metallic reflective layer, wherein the metallic reflective layer is prepared from Al, and the semiconductor absorption layer is prepared from Ge. According to the solar selective absorbing coating, the advantage that a Ge semiconductor is steep in energy band cutoff and has little adverse effect on the low infrared emissivity of metal Al is effectively exerted, so that a solar-system heat collector can absorb solar spectra to the maximum and effectively inhibit infrared radiation, and the limitations to the high-temperature application of the traditional selective absorbing coatings are broken through.

The invention discloses a ladle covering and uncovering device of an LF and a using method thereof. The ladle covering and uncovering device comprises a fixed beam supporting mechanism, a movable beamtelescopic mechanism and a driving mechanism, wherein the movable beam telescopic mechanism reciprocates on the fixed beam supporting mechanism, a fixed beam rack is arranged on the fixed beam supporting mechanism, a movable beam rack is arranged on the movable beam telescopic mechanism, and the driving mechanism is arranged between the movable beam telescopic mechanism and the fixed beam supporting mechanism. A synchronous gear set in the driving mechanism simultaneously meshes with the fixed beam rack and the movable beam rack. The problem that due to the fact that the installation space ofthe station of the LF is limited, a rail of a ladle car of the LF is arranged perpendicular to a rail of a converter, and the situation that the covering and uncovering device cannot be arranged on line is solved; heat exchange between molten steel and air is effectively blocked by covering the steel ladle, heat radiation loss of the steel ladle is reduced, tapping temperature of the converter isreduced, inclusions in molten steel are reduced, casting blank quality is improved, and the service life of a steel ladle refractory is prolonged.

The invention discloses a solar photo-thermal utilization energy gathering module with a convex lens array, and belongs to the technical field of solar photo-thermal utilization. The system comprises a convex lens array energy gathering structure, the convex lens array energy gathering structure comprises a plurality of convex lenses which are connected in series or in parallel, the convex lenses which are connected in series or in parallel form a matrix structure, and focuses of the convex lenses which are connected in series or in parallel are located on the same plane; and the heat collection plate is located on one side of the convex lens array energy gathering structure, a medium circulation pipeline is arranged on the heat collection plate, a heat absorption medium circulates in the medium circulation pipeline, and the heat collection plate is used for absorbing high-temperature heat energy generated by focusing of the convex lens array energy gathering structure. The photo-thermal utilization rate can be improved, the heat loss is reduced, and meanwhile the manufacturing and using cost is reduced.

The invention belongs to the technical field of solar energy photo-thermal utilization and particularly relates to a vacuum high-temperature solar heat collecting tube which comprises a base tube, Kovar alloy, a glass cover and a bellows. The vacuum high-temperature solar heat collecting tube is characterized in that the outer wall of the base tube is sequentially provided with an absorbing coating and a reflection-deducting coating from inside to outside; the base tube, the absorbing coating and the reflection-deducting coating are fixedly sleeved with the glass cover, and the absorbing coating and the reflection-deducting coating are located on the outer wall of the base tube; the glass cover is fixed to the two ends of the bellows through the Kovar alloy; the absorbing coating is made of a nickel and molybdenum ceramic composite material or a tungsten and cobalt ceramic composite material; the reflection-deducting coating is one or a combination of an aluminum oxide coating, a chromium oxide coating and a tin dioxide coating; the thickness of the absorbing coating is 10-25 microns, and the thickness of the reflection-deducting coating is 10-25 microns. Vacuum heat preservation is adopted by the vacuum high-temperature solar heat collecting tube, so that heat conduction loss and heat convection loss are reduced. The vacuum high-temperature solar heat collecting tube has the advantages of being resistant to high temperature, good in weather resistance and high in thermal absorptivity.

The invention discloses a crystalline silicon reduction furnace inner wall coating device and method. The crystalline silicon reduction furnace inner wall coating device comprises a base, a heating device, a gas exchange device and a power supply device, wherein the base is provided with at least two gas replacement holes; a hollow target material is the same as a bell jar in shape and smaller than the bell jar, the material of the target material is the same as the target material of a coating film, and the target material is arranged in the bell jar; the bell jar and the target material are positioned on the base; the bell jar is provided with a jacket, and a flowing medium with heat can be injected into the jacket; the heating device is arranged in the target material and is used for heating the target material; the gas exchange device is used for performing gas replacement on the space between the bell jar and the target material; when the target material is arranged in the bell jar, the gas replacement holes are positioned in a space between the target material and the bell jar; and the power supply device is provided with a positive electrode connected with the bell jar and a negative electrode connected with the target material. According to the crystalline silicon reduction furnace inner wall coating device, the ultrathin metal film with uniform structure and strong binding force can be prepared on the inner wall of a polycrystalline silicon reduction furnace, and each position of the inner wall of the bell jar can be coated at the same time, so that the problem of stress concentration or residue caused by segmented coating is solved.

The invention discloses a heating pipeline structure and a temperature early-warning method. The heating pipeline structure comprises a bearing floor, a foundation, a heating pipeline, a pipeline side a, a pipeline side b, an inner protective layer, a PERT pipe seat, a mounting groove and a thermal radiation coating. The heating pipeline structure and the temperature early-warning method have the beneficial effects that the heating pipeline is mounted in the bearing floor, so that space is utilized felicitously, and the heating pipeline is protected from being damage by the external world; the PETR pipe seat is highly heat-proof, and has high heat insulation property; the pipeline side b of the heating pipeline is connected with a mounting groove, so that radiation heat loss to the foundation is greatly reduced; as the pipeline side a is uniformly doped with a heat conduction filling agent, temperature starting can be relatively fast, heat radiation can be uniform, uneven heating is avoided, the environment temperature can be kept agreeable during use, and the thermal radiation effective rate is greatly improved; when the heating pipeline structure and the temperature early-warning method are used in places such as a library and a classroom, a large quantity of heat can be saved, so as to improve the economical applicability of the heating pipeline; and as the inner protective layer is arranged on the inner surface of the pipeline, and the PETR pipe seat is stable, the use reliability of the heating pipeline structure can be guaranteed.

The invention relates to the technical field of solar energy and discloses a solar heat collector. The solar heat collector comprises focusing devices, a plurality of vacuum heat collecting tubes, selective absorbing coatings and a bracket, wherein the vacuum heat collecting tubes are located below the focusing devices, the selective absorbing coatings are coated on the vacuum heat collecting tubes, and the bracket is used for fixedly arranging the focusing devices and the vacuum heat collecting tubes. The solar heat collector disclosed by the invention has higher working temperature, the limitations that the existing solar heat collectors have low working temperature are broken through, and the high-temperature application of the solar heat collector is promoted effectively. The solar heat collector has the advantages of simple structure, low manufacturing cost, wide application range and the like.

This invention concerns a receiver unit (10) for a parabolic trough solar plant. The receiver unit (10) has a conduit (12) for conveying a heat transfer fluid (14) and a cover (16), which is located about the conduit (12) such that a vacuum is formed between the conduit and the cover. The conduit (12) is designed to absorb thermal radiation. The cover (16) has a first portion (26) defining a window (22) through which incoming solar radiation (24) passes into the vacuum and onto the conduit (12) and a second portion (28) carrying a reflective surface (20) so as to reflect thermal radiation back onto the conduit (12). The invention also concerns a method of reducing thermal radiation loss from a parabolic trough receiver.

The invention relates to a simulation window and wall system and a simulation method for a natural illumination environment. The simulation window wall system comprises a hollow wall body, a window body arranged on a front panel of the hollow wall body, a spotlight assembly and a lamp tube assembly. The spotlight assembly is arranged in the hollow wall body and comprises multiple spotlight units,the multiple spotlight units are distributed at the upper half portion of the window body in a surrounding manner and keep a distance with the front panel, the illumination directions of the multiplespotlight units face the window body and can be turned on and turned off in sequence in the surrounding direction so as to emit light through the window body. The lamp tube assembly is arranged in thehollow wall body and is arranged along a window frame of the window body. By means of the simulation window and wall system and the simulation method for the natural illumination environment, due tothe cooperation of the multiple spotlight units and lamp tubes and adjustment of the color temperature and brightness in different time periods, all-day real-time simulation can be achieved, light raychanges can be consistent with outdoor environment light ray changes, light rays emitted by the spotlight units illuminate and penetrate the bright window body and finally are spread to the ground surface, a natural light and shadow effect can be formed, the effect can be consistent with the effect that normal sunlight penetrates the window, a human body can perceive the nature illumination anglein real time, and normal running of a biological clock is facilitated.

The invention discloses a vacuum heat-absorber of a solar water heater, comprising an inner tube and an outer tube, wherein a reflow tube is arranged in the inner tube along the axial direction of the inner tube and is provided with a small through hole. The invention has the advantages that: on the basis of the traditional solar water heater and under the same condition, by improving the internal structure of the solar vacuum heater-absorbing tube, enhancing lager circular current between hot water in the solar vacuum heat-absorbing tube and water in a heat-preserving container and reducing the temperature difference between the hot water in the solar vacuum heat-absorbing tube and the water in the heat-preserving container, solar energy absorbed by the solar vacuum heat-absorbing tube can be transmitted to and stored in the heat-preserving container in time, heat-radiating loss of hot water which generates heat radiation due to the high temperature in the solar vacuum heat-absorbingtube can be reduced, thereby improving the heat efficiency of the solar water heater; and compared with the prior art, the invention can remarkably improve the heat efficiency of the solar water heater by 2-8 percent by increasing cost slightly and can improve the temperature of the hot water of the solar water heater by 1-5DEG C.

The invention relates to the technical field of stoves, in particular to a disc-shaped pot rack and a gas stove. A plurality of circles of first platforms and a plurality of circles of first slopes are arranged on the top face of the disc-shaped pot rack, the first slopes incline upwards from inside to outside, and at least one circle of first platform is located between two circles of first slopes. and the gas stove comprises the disc-shaped pot rack. According to the disc-shaped pot rack and the gas stove, the heat loss can be reduced, and the combustion heat utilization rate can be increased conveniently.

The invention discloses a novel anti-freeze solar heat collecting module which comprises a base plate. Aluminum alloy baffles are arranged on the four edges of the base plate. A heat insulating plate is bonded to the inner surface of the base plate. A branch pipe and a heat collecting plate are installed on the heat insulating plate. A converging pipe extending to the outer side of one aluminum alloy baffle is arranged between the branch pipe. The surface of the heat collecting plate is coated with a carbon powder layer. A transparent cover plate is arranged above the heat collecting plate and connected with the aluminum alloy baffles in a clamped mode. According to the novel anti-freeze solar heat collecting module, through the structural design of adding artificial roughness and fins on the heat collecting plate, the heat exchange area of the heat collecting plate is increased in a disguised form, the convection and heat exchange effects are improved, and heat exchange on the surface of the heat collecting plate is enhanced; through the combination of the carbon powder layer applying on the surface of the module, the unification of the high solar absorptance of the surface coating and the low emissivity is achieved, the efficiency of absorbing the solar radiation energy is improved, the thermal radiation loss of the heat absorbing plate is reduced, and the working efficiency of the heat collector is improved.

The invention relates to the technical field of pipeline heat preservation, in particular to a pipeline heat preservation structure. The pipeline heat preservation structure is characterized in that aheat insulation layer 2, a fixing layer 3 and a protective layer 4 are sequentially arranged outwards from an outer wall 1 of a pipeline. According to the pipeline heat preservation structure, the heat insulation layer is formed by splicing heat insulation plates which are prepared from nano powder, and the thickness of the heat insulation layer is 5-50 mm; the fixing layer 3 is composed of glassfiber strips and plays a role in fixing the heat insulation plates; a reflecting layer 5 is aluminum foil, the mirror surface of the reflecting layer 5 can reflect infrared rays to further improve the heat insulation effect; and the protective layer 4 is metal or metal alloy, two metal skins matched with the model of the pipeline are buckled up and down on the steam pipeline, the steam pipeline is just matched and connected with the metal skins, and the rivet fixing is reduced. The pipeline heat preservation structure has the advantages of being thin in thickness, easy to construct, environment-friendly in construction, long in service life, strong in stability, free of recovery cost and the like.