337results about How to "Lower heat transfer coefficient" patented technology

The invention relates to a building material, and in particular relates to an exterior wall color surface decoration mortar and a preparation method thereof. The exterior wall color surface decoration mortar comprises the following raw materials by weight: 20%-30% of white cement, 50%-60% of quartz sand, 0.1%-0.5% of chopped fiber, 10%-20% of heavy calcium carbonate, 0.2%-1% of latex powder, 0.3%-0.5% of cellulose ether, 1%-5% of an inorganic pigment, 0.2%-0.4% of a water repellent, 5%-10% of coal powder ash, 0.1%-0.15% of a defoaming agent, 1%-3% of metakaolin, 0.2%-0.5% of a thixotropic lubricant and 1%-2% of a water reducing agent. The exterior wall color surface decoration mortar has the advantages of crack resistance, weather resistance, good ultraviolet resistance, permanent and uniform color, good whiskering resistance, and the like, can be well combined with various inorganic base layer materials, is good in coating density, and can be widely used in the building fields such as exterior wall decoration and the like.

The invention belongs to the technical field of civil engineering, and concretely relates to prefabricated heat preservation wall body. The prefabricated heat preservation wall body consists of a heat preservation layer, a concrete internal wall panel, a concrete external wall panel and an FRP connecting piece, the concrete internal wall panel is internally provided with longitudinally arranged steel bars and transversely arranged steel bars, the concrete external wall panel is internally provided with longitudinal arranged steel bars and transversely arranged steel bars, the FRP connecting piece is of a recumbent H structure and consists of a ventral shield and flange girths, two flange girths are provided in the invention and are respectively arranged at the two ends of the ventral shield; the heat preservation layer is arranged between the concrete internal wall panel and the concrete external wall panel and is internally provided with hole slots which are arranged in a crisscross way, and the FRP connecting piece is inserted in the hole slots; the end of the heat preservation wall body is provided with a splice bar which is of a U-shape structure, the two ends of the splice bar are respectively inserted into the concrete external wall panel and the concrete internal wall panel. The invention realizes a novel prefabricated heat preservation wall body with an integral structural function, has the advantages of low heat conductivity coefficient, good corrosive nature, simple and convenient construction and the like, and has relatively extensive application prospect in the field of constructional engineering.

The invention relates to a heliostat support structure, formed by a post (11), a transverse axle (13), a support arm (12) and a mirror support frame (14), wherein the support arm (12) and the mirror support frame (14) have all elements made from non metal section bar, to reduce weight and the load of transmitter, thereby using small power motor to reduce system cost. The chamber of the non-metal section bar is arranged with rib plates inside, to obtain wind resistant ability. The support arm (12) and the mirror support frame (14) are connected via a porous connector, to support easy installment and adjust the installed height of the mirror support frame (14). The invention can mount a roller element (61) on the mirror support frame (14) to reduce installment time and cost.

The invention relates to a bound thermal-insulation composite wall with supports, which provides an external thermal-insulation composite wall of building, to overcome the defects of present technique. Wherein, the concrete hanging beam support (2), the internal outwards-drawing connector (7), and the inner end of plastic expansion nail (9) are fixed inside the main construct concrete (10) or basic wall (1); the concrete hanging beam support (2) and the outer end of inner outwards-drawing connector (7) are inside the outer protective layer (8) to connect the vertical steel bar (5); the outer side of basic wall (1) has a thermal-insulated layer (3) fixed via plastic expansion nail (9); the outer side of thermal-insulated layer (3) has a vertical steel bar (5); the outer or inner side of vertical steel bar (5) has a metallic network (4) which is connected to the vertical steel bar (5); the outer side of thermal-insulated layer (3) has a outer protective layer (8) made from cement sand pulp or pea stone concrete. The invention has the advantages that safety, long service life, better thermal insulation and flameproof.

The invention discloses a recycled concrete load-bearing thermal insulation block with three rows of holes, which is characterized in that the block is composed of walls and ribs, and the gaps between the walls and ribs are holes. The holes are filled with insulation boards. Crush construction waste into recycled aggregate, and make recycled fine aggregate and recycled coarse aggregate; weigh cement, water, recycled fine aggregate and recycled coarse aggregate according to the formula, and mix cement: water: recycled fine aggregate : Regenerated coarse aggregate = 375: 150: 664: 811 weight ratio mixing, mixing evenly, through the block forming machine to make a three-row hole recycled concrete load-bearing block with a compression ratio of 0.86; fill the insulation board to the three-row hole regeneration In each hole of the concrete load-bearing block, it is verified by experiments that the block of the present invention has higher compressive strength, has increased heat conduction paths and heat preservation materials, and has better heat preservation effect.

The invention discloses a preparation method for an assembled buckle-typed building block combination energy-saving wall plate, which is characterized in that a front panel and a rear panel are respectively inserted into panel assembly troughs which are arranged at two ends of four side plates, thus leading the front panel, the rear panel and the four side plates to be assembled together to form a whole hollow wall plate frame; subsequently, a pasty middle filling layer is injected into the hollow wall plate frame through small holes on the upper side plate by a tunnel high-pressure pouring method; after the pouring operation is completed, the solidification is carried out on a conveyor belt; subsequently, the filling layer is smoothly arranged and cured for a certain time; subsequently, the finished product is gained after the packaging is completed. The preparation method of the invention has the advantages of being directly used as screen walls, light weight, high strength, good heat preservation and sound insulation effects, good surface decoration effect, waterproofing and dust-proofing, beauty, saving decoration procedure, thus quickening the decoration progress and the construction time.

The invention provides a thermal-insulating heat-preserving laminated safety glass and a manufacturing method thereof. The structure of the thermal-insulating heat-preserving laminated safety glass comprises, from top to bottom, a first glass layer, a transparent thermal-insulating coating the inner surface of the first glass layer, a polymer film and a second glass layer; or the thermal-insulating heat-preserving laminated safety glass is further provided with a gas spacing layer and a third glass layer. The manufacturing method comprises the following steps: (1) preparing the transparent thermal-insulating coating; and (2) preparing the thermal-insulating heat-preserving laminated safety glass; or preparing a thermal-insulating heat-preserving laminated safe hollow glass from the thermal-insulating heat-preserving laminated safety glass. The thermal-insulating heat-preserving laminated safety glass or thermal-insulating heat-preserving laminated safe hollow glass has good impact resistance, low shading coefficient, low thermal coefficient, low ultraviolet transmittance, high visible transmittance and low near-infrared transmittance and is capable of preventing radiant heat of the sun entering a room in summer so as to realize thermal insulation and capable of reducing indoor heat loss in winter so as to realize heat preservation.

The invention belongs to the technical field of heat exchangers, which relates to an enhanced heat transfer fin and a production process thereof. The enhanced heat transfer fin comprises a flat and straight substrate, wherein waveform fins which are raised on the flat and straight substrate and form certain angle with the flat and straight substrate are formed on the flat and straight substrate, reversing areas are arranged between a plurality of the waveform fins and divide the waveform fins into a plurality of groups waveform fin areas with different numbers of ripples, the wavelength and the wave amplitude of each waveform fin in each group are equal to each other, the number and the wavelength of the waveform fins of different groups are no equal to each other, and the number of the waveform fins in each group of the waveform fin area decreases in turn in the whole fin length while the wavelength increases in turn. The production process of the enhanced heat transfer fin is to put an aluminum strip on a roll forming machine to form the enhanced heat transfer fin provided with the waveform fins and the flat and straight substrate through one-step rolling. The enhanced heat transfer fin has good heat transfer property and small resistance, and is suitable to serve as a heat transfer fin of an automotive heat exchanger, a water tank radiator, a pressurizing intercooler and a wind cooling type hydraulic oil cooler.

The invention relates to a liquid hydrogen storage material and a preparation method thereof. The liquid hydrogen storage material comprises a carbazole type hydrogen storage component and an additivewith a low melting point and a high heat transfer coefficient; the carbazole type hydrogen storage component is at least one of carbazole, N-methyl carbazole, N-ethyl carbazole, N-n-propyl carbazole,N-isopropyl carbazole or N-n-butyl carbazole; the heat conduction additive component with a low melting point is at least one of benzyltoluene or hydrogenated terphenyl. The liquid hydrogen storage material is a mixture formed by mixing the carbazole type hydrogen storage material with a high melting point with the heat conduction additive with a low melting point and has an eutectic point whichis at least lower than the melting point of one component, and the melting point of the entire hydrogen storage material can drop to 0 DEG C or below. At the same time, the heat conduction additive with a low melting point has a high heat transfer coefficient, and the heat conductivity coefficient of the mixture formed after the additive is mixed with the carbazole type hydrogen storage material can be higher than that of the carbazole type hydrogen storage material; the whole hydrogen storage material can quickly reach the dehydrogenation temperature during dehydrogenation, so that the release rate of hydrogen is increased.

The invention relates to a composite armored thermal insulation wall of foamed concrete and a construction method thereof, belonging to the field of thermal insulation walls, and the composite armored thermal insulation wall is used for a non-bearing wall of a building. The wall disclosed by the invention comprises an external wall plate layer, an internal wall plate layer, a foamed concrete insulating layer, a trowel finish mortar layer for an external wall surface, a trowel finish mortar layer for an internal wall surface, and foamed concrete filling blocks, wherein the foamed concrete insulating layer is arranged among the internal wall plate layer, a load bearing pillar and the external wall plate layer; the trowel finish mortar layer for the external wall surface and the trowel finish mortar layer for the internal wall surface are arranged on the external surfaces of the external wall plate layer and the internal wall plate layer; and the weight by volume of the foamed concrete of the wall disclosed by the invention is 200 to 400 kg/m<3>. The invention provides the novel thermal insulation wall which has the advantages of low manufacturing cost, convenience and rapidity for construction, light dead weight but high strength, prominent energy-saving effect, superior service performance and no secondary pollution.

This invention relates to a micro-hole rubber hollow glass spacing strip used in hollow glasses composed of rubber, curing agent and aids characterizing that said rubber is composed of EPT rubber and molecular sieve activation powder with the following weight percentage: EPT rubber 100 portions, activation powder 80-200 portions.

At present, a sun-shading curtain radiates heat which is more than that obtained by an external sun-shading system under sunlight radiation and is close to that obtained by an internal sun-shading system when being used in a centrally-mounted sun-shading system, and the centrally-mounted sun-shading system has a poor insulation energy-saving effect. The invention provides a centrally-mounted movable sun-shading system of a building external window with low heat gain efficiency under sunlight radiation. The centrally-mounted movable sun-shading system comprises an external window frame, an inner hollow glass layer and an outer hollow glass layer which are installed on the external window frame, a movable sun-shading curtain arranged between the inner hollow glass layer and the outer hollowglass layer, and a control device of the movable sun-shading curtain. The centrally-mounted movable sun-shading system is characterized in that a mirror surface or reflection heat insulation coating is formed on the surface of the outer side of the movable sun-shading curtain; and an upper ventilating pipe and a lower ventilating pipe are respectively embedded in upper sealant and lower sealant which are arranged between the inner hollow glass layer and the outer hollow glass layer. According to the invention, the heat insulation effect is effectively improved, and the purpose of reducing indoor solar radiation heat through an external window and further reducing refrigeration energy consumption of an air conditioner in a building in summer is achieved.

The invention relates to a self-cleaning heat-insulation coating system for an exterior wall. The self-cleaning heat-insulation coating system comprises (a) a hydrophobic undercoat layer, (b) a heat-reflecting surface coating layer and (c) a hydrophilic overcoat layer, wherein the hydrophobic undercoat layer is made from a first coating composition, the first coating composition contains aqueous emulsoid, the water permeability rate of the undercoat layer is 0.3 ml per 24 hours, the heat-reflecting surface coating layer is made from a second coating composition, the second coating composition contains a heat reflecting filler, the surface coating layer has the sun reflectance of at least 85% and/or the hemisphere emission ratio of at least 85%, the hydrophilic overcoat layer which is made from a third coating composition is coated on the heat-reflecting surface coating layer, and the third coating composition contains nano titanium dioxide and an aqueous solvent.

The invention provides a preparation method of flame-retardant antibacterial water-based coating. The content of a plant extract is 0.1-5%; and the plant extract is one or more of a wormwood extract,a Sarcandra glabra extract, a lavender extract, a valerian extract and a seaweed extract, or one or more of quercetin, salicylic acid, emodin, menthol, menthone, hyperoside, fumaric acid, linalool, caffeic acid, calcium alginate and sodium alginate, and slows the coating to have a plant natural antibacterial effect. A preparation process of the coating also comprises the following steps: preparinga film-forming substance, preparing color paste, preparing a diatomite porous material, preparing a functional modifier containing the plant extract, and preparing the water-based coating. Through the preparation process, the flame retardant property of the coating and the mechanical strength of a coating film are improved at the same time, and the application field of the coating is widened.

The invention discloses a thermal insulation concrete and a production method thereof. The thermal insulation concrete comprises the following components in parts by weight: 100-120 parts of coal ash, 200-250 parts of cement, 50-75 parts of foamed plastic, 25-30 parts of foam glass, 40-55 parts of inflated mineral powder, 0-20 parts of silicate, 15-20 parts of sulfate, 80-100 parts of fine sand, 10-20 parts of silicon powder, 5-10 parts of talcum powder, 10-15 parts of a water reducing agent, 22-25 parts of a foaming agent and the balance of water, wherein the water-binder ratio is maintained at 0.5-0.6, the inflated mineral powder comprises inflated slag or float stone, the water reducing agent is poly-hydroxy acid, and the foaming agent is alkyl sulfate. By utilizing the manner, the thermal insulation concrete is light in mass, low in cost, small in heat transfer coefficient and good in thermal insulation property and sound insulation effect; the production method of the thermal insulation concrete is simple, and the operation process is easy to control.

The invention discloses a prefabricated sandwich insulation wall based on plate perforated FRP connecting pieces and a manufacturing method thereof. The prefabricated sandwich insulation wall comprises an inner-layer concrete plate, an outer-layer concrete plate, a middle insulation layer and FRP connecting pieces; the inner-layer concrete plate and the outer-layer concrete plate are compounded byfiber knitted nets and ECC concrete; through transverse penetration of the FRP connecting pieces, the fixed connection among the inner-layer concrete plate, the middle insulation layer and the outer-layer concrete plate is realized; and holes are formed in the two side edge positions, in the inner-layer concrete plate and the outer-layer concrete plate, of the FRP connecting pieces at intervals.Through full use of such characteristics as high corrosion resistance and low heat conducting coefficient of the plate perforated FRP connecting pieces, the thermal bridge effect is eliminated, the safety and the durability of the wall are improved, and meanwhile, such problems as weak bonding and anchoring performances of connecting pieces of a traditional insulation wall with a sandwich layer and a concrete interface are solved.