161 results about "Initial heat" patented technology

The invention provides an air conditioner as well as a control method and device thereof, wherein the method comprises the following steps: acquiring an indoor temperature / humidity, an outdoor temperature / humidity and user parameters; calculating an initial heat load or initial cold load according to the indoor temperature / humidity, the outdoor temperature / humidity and the user parameters; calculating the output capacity of the air conditioner according to the initial heat load or initial cold load and a preset cooling rate or heating rate; and determining the frequency of a compressor according to the output capacity of the air conditioner. Through the invention, the air conditioner can run with a frequency generated when the running efficiency of the air conditioner is the optimum efficiency, thereby reducing the power consumption.

A wind vortex tower is enhanced by kinetic energy and heat of quasi-tangential and upward jets of saturated steam energizing, accelerating tornado-type flow and supporting stable electricity generation during the insufficient winds and calm. For action instead of absent wind at starts and operation over a long time, a staged system of flexible nozzles injects the steam jets into the zones of vortex channel. The system controls the tornado-type flow in the vorticity energizer, swirlers of sucked ambient air, condensate separators, re-enhancer of airflow and top diffuser. The steam is flashed from partially stored condensate heated nearly to 100° C. The condensate is partially delivered after centrifugal separation from saturated vortex core. The outside water heating system has one or two of compatible renewable, waste and secondary, or initial heat sources, and is intensified via sucking of heated water by vortex flow. A large-rating flow-through electric generator has an alternating magnetic whirl formed by magnetic concentrators whirled near vortex core and a three-phase stator with switched modules. The simplified towers are used for water and conditioned air production.

The large-scale green power, pure chilled, heated water and / or conditioned directed air are produced using wind, heat and vapor of the free humid air in the structured multi-unit space-saving vortex tower providing direct three-phase voltage induction with alternating magnetic whirl formed by pole radial self-orienting magnetic concentrators swirled via all-weather multi-step tornado-like flow supplementary energized, enhanced and controlled by a spatial system of fast directing and accelerating low-temperature steam jets injected through fleshing of recycled, separated and stored condensate slightly heated with any renewable, waste, secondary, or prime source of low-temperature heat, partly via combining with solar pond and heaters or / and geothermal media, or / and waste, secondary or initial heat of large thermal, atomic power plant or intensively energy consuming industry, reducing specific investment, energy and pure water costs, quality requirements, specific pollution and waste heat atmospheric injection, with possibilities of partial local weather corrections through conditioned directed waste tower air; a new sector with various directions can be widened, based on applying of the same principles of energizing, enhancement, control and usage of any kind of fast gaseous confined vortex flow via any kind of supplementary low-temperature steam

The invention relates to an ultra-low temperature heat sealing polypropylene casting film which is formed by casting, co-extruding and compounding a heat-sealing layer, a polypropylene core layer and a polypropylene corona layer, wherein the heat-sealing layer is mainly prepared from the following components: 10-80 portions of polypropylene random copolymer, 20-90 portions of polyolefine elastomer, 0.1-0.5 portion of slipping agent and 0.1-0.5 portion of anti-blocking agent. By optimally designing the contents of various components of heat sealing material, the invention effectively reduces the initial heat sealing temperature of a packing film and widens the heat sealing temperature range. After being put into production, the ultra-low temperature heat sealing polypropylene casting film can improve the speed of packing and making bags, ensure the sealing performance of the bags and simultaneously reduce the scrape rate of making bags, thereby the production efficiency of application manufacturers can be greatly improved. The ultra-low temperature heat sealing polypropylene casting film can be widely applied to quick and automatic package of foods, medicines, textiles and other articles and particularly has advantages in the automatic packing filed with high requirement on air tightness.

The invention provides a shaft heat loss determining method. The shaft heat loss determining method comprises the steps that calculating parameters are read in; thermal resistance values at all positions in the radius directions in a shaft and a radial upper heat loss limit value of a shaft unit are calculated; a radial initial heat loss value of the shaft unit is set; a first current value and a second current value are set; a current total thermal resistance value and a third current value are calculated in a circulatory mode, and the first current value and the second current value are updated until the updated second current value is larger than or equal to the depth of the shaft; the obtained third values are summed, and the result obtained after summation is determined to be the shaft heat loss value. By the adoption of the shaft heat loss determining method, heat loss calculation is conducted on the shaft in a sectional mode, so that the shaft heat loss result worked out is more accurate.

The invention discloses a magnetic-field heat treatment method of a nanocrystal magnetic core. According to the method, a transverse magnetic field is applied to heat treatment by combining a known process condition during actual production on the premise of meeting market application demand, the magnetic-field heat treatment process step is particularly considered and refined from different magnetism steps and by changing the size of magnetism current, an optimal magnetism mode of an initial heat preservation temperature of 330 DEG C to a cooling finish step and the additionally-arranged transverse magnetic field is finally obtained, and the size of the magnetism current is preferably 80-140A. The high induction value of the magnetic core sample in such heat treatment condition is maintained, the coercive force and the iron loss are obviously reduced, thus, the comprehensive performance of the magnetic core is more excellent, and the market application prospect of a nanocrystal magnetic core product is expanded.

The present invention provides an air conditioner operation control method, an air conditioner operation control system and an air conditioner, wherein the air conditioner operation control method includes: periodically detecting the surface temperature of the human body and the ambient temperature through an infrared sensor; according to the The human body surface temperature and the ambient temperature are used to calculate the human body heat dissipation through a predetermined heat dissipation formula; and the operating parameters of the air conditioner are adjusted according to the difference between the human body heat dissipation and the initial human body heat dissipation. Through the technical solution of the present invention, the operation of the air conditioner can be controlled according to the real-time heat dissipation of the human body in the sleep mode, so that the cooling or heating effect of the air conditioner can adapt to the sleeping state of the human body, and avoid the air conditioner parameters being fixed or automatic during sleep. Adjust the user's overcooling or overheating problems caused by unreasonable adjustments to improve user experience.

The invention discloses a polythiamide amides polymerized substance and a process for preparation, which is characterized in that the process comprises adding 1-5 parts auxiliary agent, 2-8 parts catalyst, 0.1-6 parts alkali or strong base-weak acid salt, 100-500 parts organic solvent and 5-30 parts entrainer into autoclaves of an in-out pipe with nitrogen gas, a water separater, a stirrer and a thermometer, adding sodium sulfide 13 parts whose content is 60% after being evenly stirred, dewatering for 0.5 to 3 hours in 160-200 DEG C under the protection of nitrogen, adding 35.2 to 49.2 parts dihalogenated aromatic amide when the reaction temperature is lowered to 80-150 DEG C, keeping for 2-10 hours in 160-230 DEG C, pouring reaction liquid into water, separating out polymers, purifying with deionized water and acetone after washing and drying, at last obtaining high molecular weight polythiamide amides polymerized substance after drying for 24 hours in 120 DEGC in 0.09 MPa vacuum degree. The inherent viscosity eta=0.1-0.86( the density is 0.1g / dL, and the measuring temperature is 30+-0.1 DEG C), the glass transition temperature Tg is 150-300 DEG C, the initial heat decomposition temperature Td is 440-480 DEG C.

A method for growing a silicon crystal by a Czochralsky method, wherein, let a pulling speed be V (mm / min) and an average value of an in-crystal temperature gradient in a pulling axis direction within a temperature range, a silicon melting point to 1350° C., be G (° C. / mm), V / G ranges from 0.16 to 0.18 mm2 / ° C. min between a crystal center position and a crystal outer periphery position, and a ratio G outer / G center of an average value G of an in-crystal temperature gradient in a pulling axis direction within a temperature range, a silicon melting point to 1350° C., at a crystal outer surface to that at a crystal center is set to up to 1.10 to thereby obtain a high-quality perfect crystal silicon wafer. Such a perfect crystal silicon wafer, wherein an oxygen concentration is controlled to up to 13×1017 atoms / cm3, an initial heat treatment temperature is at least up to 500° C. and a temperature is raised at up to 1° C. / min at least within 700 to 900° C., thereby making uniform a wafer radial distribution to an arbitrary oxygen precipitation density level.

A process for making Type 60 Nitinol with shape memory effect from hot-worked material, such as hot rolled Type 60 Nitinol sheet or plate, includes heat treatment to a temperature of 600° C.–800° C. and holding the material at that temperature until the temperature has equalized throughout, and then heat soaking at that temperature for about 15 minutes. The material is then quenched immediately from that temperature, to a temperature below 300° C. This heat treatment produces Type 60 Nitinol in a condition denoted “ultraelastic”. Ultraelastic Type 60 Nitinol has a shape memory characteristic having a very low transition temperature. The transition temperature can be tailored within a wide temperature range by the temperature of the initial heat treatment and subsequent rate of cooling.

The invention discloses a nanometer compound material of expansion retardant polypropylene / organic clay as well as a preparation method thereof; the invention is characterized in that 65.0 to 70.0 percent of polypropylene, 3.0 to 8.0 percent of macromolecular compatilizer, 0.5 to 2.5 percent of organic clay, 24.0 percent of expansion retardant and 0.5 to 2.5 percent of rare earth metal oxide are uniformly mixed according to the weight percentage; then the mixture is extruded and granulated, thus obtaining the product; the oxygen index thereof can be as high as 33 percent; according to the vertical consumption testing standard UL-94V0grade and tested by a cone type calorimeter, the peak value of the heat release speed is 250kW.m<-2>; the total heat release amount is 85MJ .m<-2>; the initial heat decomposing temperature is 273 DEG C; the largest heat decomposing temperature is 388 DEG C; the left mass fraction at the temperature of 600 DEG C is 12.0 percent; the nanometer compound material can be used as the special material used for electric apparatuses.

A tubing connection provides a unique nut assembly that does not loosen or leak when exposed to the initial heat / cool cycles of a chemistry setup. The nut assembly includes a outer housing portion, and a concentric inner locking ferrule. A cavity defined between the inner and outer portion houses a stainless steel spring secured therein by a snap-engaged spring retainer. As the outer nut is rotated on the threads of the fitting, it drives the spring retainer toward the ferrule, thereby compressing the spring and causing it to maintain the engagement of the tubing end on the connector fitting.

The invention relates to a multi-loop cable steady-state temperature rise acquisition method adapting to various boundary conditions. The method comprises the following steps: 1) constructing a multi-loop cable steady-state temperature rise model adapting to various boundary conditions according to a thermal field superposition principle; 2) acquiring an initial temperature rise matrix T<0> according to a set initial heat flow matrix Q<0>; 3) performing reduction according to the initial temperature rise matrix T<0> and the boundary conditions to form a reduced heat flow matrix Q<1>; 4) acquiring a next-step temperature rise matrix T<1> according to the reduced heat flow matrix Q<1>; and 5) judging whether a maximum difference value among all elements which correspond to the initial temperature rise matrix T<0> and the next-step temperature rise matrix T<1> is greater than a convergence threshold or not, if so, substituting T<0> with T<1> and returning to the step 3), and otherwise, judging that a current corresponding temperature rise matrix is a steady-state temperature rise matrix. Compared with the prior art, the multi-loop cable steady-state temperature rise acquisition method has the advantages of easiness and accuracy in calculation, high calculation efficiency, advanced algorithm, adaptability to various boundary conditions, and the like.

The invention provides a temperature calculation and control method and a temperature calculation and control device for the mixed liquor of a gravity fire flooding production well. The method comprises the following steps of calculating an upper limit value of heat loss of a shaft of the production well; setting initial radial heat loss values of segmented units of the shaft according to the upper limit value of the heat loss of the shaft; iteratively calculating first temperature field distribution from the heel to the tiptoe of the shaft of the production well according to the set initial heat loss values; calculating hot water temperature T2 at an outlet of an oil pipe at the tiptoe according to the first temperature field distribution, and calculating the initial temperature of the oil-water mixed liquor at the tiptoe; calculating second temperature field distribution from the tiptoe to the heel according to the first temperature field distribution and the initial temperature of the oil-water mixed liquor at the tiptoe; regulating an injection parameter of a wellhead according to the calculated second temperature field distribution of the mixed liquor of the production well, and controlling the temperature of the mixed liquor. According to each embodiment of the invention, the temperature of the mixed liquor of the production well can be rapidly and accurately calculated and controlled.

The invention relates to a multi-circle cable steady-state temperature rise acquiring method based on a transfer matrix, used for acquiring the temperature rise of a multi-circle power cable. The method comprises the steps of 1, acquiring the transfer matrix A of a multi-circle cable steady-state temperature rise model, and establishing a multi-circle cable steady-state temperature rise model; 2, setting an initial temperature rise matrix T0 and acquiring an initial heat flow matrix Q0 corresponding to the initial temperature rise matrix T0; 3, acquiring a next temperature rise matrix T1 according to the multi-circle cable steady-state temperature rise model and the initial heat flow matrix Q0; and 4, judging the maximal difference between all corresponding elements of the initial temperature rise matrix T0 and the next temperature rise matrix T1 is more than a convergence threshold, if yes, replacing T0 with T1, and returning to the step 2, and if no, determining the current corresponding temperature rise matrix to be a steady-state temperature rise matrix. Compared with the prior art, the method has the advantages of being simple in computation, accurate, high in computing efficiency and advanced in algorithm.

The invention relates to the technical field of industrial energy conservation and emission reduction and particularly discloses a waste heat utilization system of a gas-steam combined cycle generator set. The waste heat utilization system of the gas-steam combined cycle generator set comprises steam coming out of the gas-steam combined cycle generator set and entering a condenser and is characterized in that a water outlet pipe of the condenser is connected with a circulating water pump, a water cooling tower, a heat supply network water return pipe and an initial heat supply station in parallel, the initial heat supply station is communicated through a heat supply network circulating water pump, and the initial heat supply station is connected with a steam turbine. Steam exhausted by the steam turbine is totally recovered to prevent loss, zero cold source loss is achieved, the thermal efficiency of the whole system in the heat supply period reaches more than 90 percent, and the national requirements for energy conservation and emission reduction are met.

The invention provides a cold storage defrosting control system and control method. The cold storage defrosting control method comprises the following steps that according to an inlet and outlet temperature of an indoor evaporator, and an initial heat exchange amount Q0 of the indoor evaporator is calculated; according to an inlet and outlet temperature of an outdoor condenser, the flow velocitiesof the indoor evaporator, the outdoor condenser, a throttling device, and a connecting pipeline, and an input voltage and an input current of a compressor, and an actual heat exchange Q1 of an outdoor evaporator is calculated; and whether the actual heat exchange Q1 is less than an initial heat exchange Q0 or not is judged, if yes, defrosting operation is carried out. According to the cold storage defrosting control system and control method, a beneficial frost layer and a harmful frost layer of the surface of the indoor evaporator can be differentiated correctly, and unnecessary damage to storing goods due to the fluctuation in the cold storage or of the environmental temperature caused by defrosting is avoided; and then the cold insulation effect of the cold storage is ensured, retain freshness degree of the food in the cold storage is enhanced, the storage period of the food is prolonged, and market application prospect is high.

The invention provides a multi-heat-source single-pipe waste heat utilization heat supply system and method. The system comprises multiple heat sources, a single-pipe heat supply network and heating stations. The heating stations comprise one or more of energy stations, indirect supply stations, direct supply stations and large-temperature-difference heating stations, an outlet of the initial heat source is connected with an inlet of one heating station through the single-pipe heat supply network, the heating stations are connected to the single-pipe heat supply network in series, the heat sources and the heating stations are alternately connected in series, independent circulating water pumps are arranged on inlet pipelines of the heating stations, an outlet of one heating station is connected with an inlet of the next heating station through the single-pipe heat supply network or connected with a water return port of the next heat source, and an outlet of the next heat source is connected with an inlet of the further next heating station through the single-pipe heat supply network. An outlet of the heating station at the tail end is connected with a water return port of the initial heat source through the single-pipe heat supply network, and then a circulating loop of the single-pipe heat supply network is formed; the single-pipe heat supply network is a branch pipe network annularly arranged by an equal-pipe-diameter heat supply pipeline. The system is convenient to install and small in occupied area and urban municipal infrastructure can be promoted.

The invention relates to a high-water-absorption high-strength polyester fiber writing head and a preparation method of high-water-absorption high-strength polyester fiber writing heads. The preparation method comprises the specific steps that (1), polyester fibers are twisted together and then are subject to alkali weight reduction processing, washing and drying; (2), initial heat setting is performed; (3), a two-component polyurethane adhesive is adopted for gum dipping; (4), fiber bundles dipped with the adhesive are preheated, cured and foamed; (5), completely-foamed fiber rods are cut andground; and (6), the high-water-absorption high-strength polyester fiber writing heads are obtained after cleaning and drying, and each of the finally-obtained polyester fiber writing heads has the water absorption of 59.0-62.8% and the strength of 15-22 N. The preparation method of the high-water-absorption high-strength polyester fiber writing heads has the beneficial effects that the process is simple, and each of the prepared polyester fiber writing heads has the high strength while the high water absorption is ensured and has the extremely high popularization value.

The invention discloses a composite sea cable current-carrying capacity calculating method. The method comprises establishing a geometrical model; outputting physical property parameters of composition materials; performing grid division and establishing a finite element model of a photoelectric composite sea cable; setting value ranges of environment temperatures and heat convection coefficients, an initial environment temperature, an initial heat convection coefficient, a photoelectric composite sea cable working current; calculating temperature field distribution of the photoelectric composite sea cable and acquiring the conductor temperature and the optical fiber temperature in the photoelectric composite sea cable; determining whether |TC-t| is larger than epsilon or not, determining whether TC-t is larger than 0 or not; storing the environment temperatures, the heat convection coefficients, the current-carrying capacity and the optical fiber temperature to a current-carrying capacity database; adjusting the parameters so as to enable the heat coefficient h to be equal to h2; adjusting the parameters so as to enable the environment temperature T to be equal to T2; and calculating the current-carrying capacity of the photoelectric composite sea cable at the optical fiber temperature. The method can flexibly and dynamically adjust the current-carrying capacity of the photoelectric composite sea cable according to season changes and environmental condition changes so that the capability of transmitting electric energy of the photoelectric composite sea cable can be exerted to the utmost.

The invention relates to a N-substituted maleimide heat resistant modifier containing rare-earth, which is prepared by following steps that processes raw materials, adds water, emulsifier, and initiator into a reactor, adds mixture monomer of N-substituted maleimide, maleate rare-earth, methyl methacrylate and phenylethene, increases temperature and reacts, demulsifies via octadecanoic hydrone aluminum sulfate solution, washes and dries, to obtain N-substituted maleimide heat resistant modifier containing rare-earth. The inventive heat resistant modifier can improve heat resistance and stability of PVX, while the soften point of the blended and modified PVC vicat is improved 4.7DEG C than pure PVC, the initial heat decomposition temperature is improved 6.70DEG C than pure PVC, and temperature at 50% of heat loss is improved 17.31DEG C than pure PVC. The blended and modified PVC has better mechanical property, which impact strength and tensile strength are respectively improved 1.62% and 3.35% than pure PVC.

The invention discloses cyanate ester resin modified by phosphoric hybridization and a preparation method of the cyanate ester resin. The preparation method comprises the steps of: enabling oxidized graphene, a phosphonitrilic chloride trimer and hyperbranched polysiloxane to react so as to obtain phosphoric hybridization oxidized graphene formed under the action of chemical bonds of the oxidized grapheme, the phosphonitrilic chloride trimer and the hyperbranched polysiloxane; and then, uniformly mixing molten cyanate ester resin and the phosphoric hybridization oxidized graphene so as to obtain a mixture, and performing curing process on the mixture so as to obtain the cyanate ester modified by the phosphoric hybridization oxidized graphene. Compared with the cyanate ester resin, on the basis that a prominent dielectric property of conventional cyanate ester resin is basically maintained, under the condition that the phosphorus content is below 0.10wt%, the cyanate ester modified by the phosphoric hybridization oxidized graphene, prepared by the method disclosed by the invention, has excellent thermal properties and fire resistance properties, and solves the problems that according to the thermosetting resin modified by a general phosphoric fire retardant, the initial heat decomposition temperature is reduced, the start igniting time is shortened, and the dielectric property is notably reduced. The preparation method provided by the invention also has the characteristics of simple technology, low cost, wide source of raw materials, and the like.

The invention provides a composition for a polymer film, a polymer film and a multilayer film; the composition comprises propylene polymer and a film forming additive; on a basis of the total amount of the propylene polymer, the content of the propylene structure unit is 80-95 wt%; the content of the ethylene structure unit is 1-10 wt%; the content of the alpha-olefin structure unit is 1-19 wt%; the propylene polymer comprises 1-20 wt% of xylene soluble substances, and 80-99 wt% of xylene insoluble substances; the crystallization temperature of the xylene soluble substance is 40-65 DEG C, and the melting temperature is 80-97 DEG C; the crystallization temperature of the xylene insoluble substance is 85-105 DEG C, and the melting temperature is 125-135 DEG C. The composition of the invention has good film forming capability, and the polymer film formed by the composition has a low initial heat-sealing temperature and good thermal adhesion resistance. The polymer film of the invention is suitable for being used as a heat-sealing layer for a heat shrinkable film or a multilayer film.

The invention provides a heat treatment optimization method for carburized steel bearing rings. The method comprises the following steps that a thermal physical property, a CCT curve, a TTT curve anda hardening capacity curve are obtained; according to all curves and an established initial heat treatment process, a heat treatment simulation model under coupling of a temperature field, a tissue field and a stress field of a carburized steel bearing ring is established, and the carburizing steel bearing ring is subjected to heat treatment process simulation to obtain martensite, hardness, carburized layer and stress tracking data of each part of the bearing ring; if the data meets the requirement, the bearing ring is subjected to heat treatment according to the initial heat treatment process; and if the requirement is not met, the parameters are adjusted to recalculate the data, and if the data at the moment meets the requirement, the data is used as the heat treatment process parameterof the bearing ring. According to the method, various details in the heat treatment process can be flexibly adjusted, the process parameters are adjusted in real time, and certain universality is achieved. According to the treatment process provided by the invention, the energy can be effectively saved, and the economic time and the economic cost can be effectively saved.

The invention relates to the technical field of heat stabilizers, especially to an environmentally-friendly heat stabilizer for chloro fatty acid methyl ester. The environmentally-friendly heat stabilizer comprises the following raw materials (by weight): 60-80 parts of an epoxy compound, 1-10 parts of glyceryl ether, 1-10 parts of organic acid zinc, 1-5 parts of organic alkali, 1-10 parts of non-phenolic phosphate, 1-5 parts of beta-dione, 0.5-2 parts of an antioxidant, 0.05-0.5 part of a light stabilizer, 0.05-0.5 part of an ultraviolet light absorber, and 5-15 parts of environmentally friendly solvent oil. The epoxy compound is composed of epoxidized soybean oil, epoxidized vegetable oil and epoxy methyl ester at the mass ratio of 1:2:3. The environmentally-friendly heat stabilizer hasgood compatibility with chloro fatty acid methyl ester, can increase thermal decomposition temperature and ultraviolet stability of chloro fatty acid methyl ester, also can obviously improve its initial heat resistance, has good environmental protection property, contains no toxic heavy metal component, and has strong usability. The preparation method is simple to operate and is easy for industrial production.

The invention belongs to the field of heat stabilizers, and particularly relates to a composite heat stabilizer and a preparing method thereof.The composite heat stabilizer comprises, by weight, 3.5-12 parts of heat stabilizers, 8-15 parts of polyol ether, 1-5 parts of light stabilizers, 3-6 parts of octadecanamide and 10-15 parts of mineral oil, and the heat stabilizers is prepared in the mode that the weight ratio of zinc stearate to rare earth salicylic acid to phosphite ester is 1:(0.5-1):(2-5).The composite heat stabilizer is long in heat stable time, good in initial heat stability and weather resistance and not prone to sublimating and separating out, and has the advantages of being simple in preparing and easy to operate.

The invention provides a heat radiating method of a radiator for communication equipment. The heat radiating method at least includes an initial heat radiation step, a refrigerating step and a condensate water treatment step. In the initial radiation step, the radiator starts working and radiates heat transmitted by the communication equipment, a fan starts working and provides sufficient air flows to the radiator to form air convection around the radiator, and heat radiation of the radiator is accelerated. In the refrigerating step, a semi-conductor refrigerating piece works to reduce the temperature around the refrigerating surface thereof. In the condensate water treatment step, air-convection heat radiation of the refrigerating surface of the semi-conductor refrigerating piece is achieved by the air flows generated by the fan through flow guide wind tunnels so as to reduce condensate water generated by working of the semi-conductor refrigerating piece and accelerate evaporation of the condensate water. Through the initial heat radiation step, the refrigerating step and the condensate water treatment step, heat radiation efficiency of the radiator is improved, and the communication equipment is prevented from being influenced by the condensate water.

The invention belongs to the technical field of agricultural engineering, and discloses a greenhouse heat energy collection and heat energy raising method and system, which can realize the heat energy storage of transferring and storing the heat collected by the heat energy collector arranged on the back wall in the shallow soil of the greenhouse during the daytime At night, the heat of the thermal energy storage in the shallow soil is used as the initial heat source, and the heat is raised by the heat pump before heating the greenhouse to increase the night temperature of the solar greenhouse. The method of the invention uses solar energy as a heat source, does not produce harmful gases, and has no pollution to the environment; the heat collection system uses the shallow soil heat source of the greenhouse, which reduces the initial investment cost; the heat in the greenhouse can be transferred to the shallow soil during the day , the temperature of the shallow soil is increased, and the operating efficiency of the heat pump unit is also improved.

The invention relates to intelligent homes and provides an intelligent alarm system. A cloud server is connected with a mobile terminal through a wireless communication module to achieve signal transmission; after the system is started, an infrared detection scanning module is used for acquiring initial heat source information of to-be-prewarned space, real-time heat source information in the to-be-prewarned space is detected in real time, when the real-time heat source information is not consistent with the initial heat source information, the infrared detection scanning module carries out infrared thermo-scanning imaging on the to-be-prewarned space, and a scanning result sending module sends images to the cloud server through the wireless communication module. The cloud server receives the images according to the scanning result and sends the images to a scanning result analysis and judgment module. The scanning result analysis and judgment module analyzes and judges the images according to a preset program, and when the images meet preset alarm conditions, an alarm sending module sends alarm information to an alarm receiving module of the mobile terminal.

The invention discloses a preparation method of graphene / mesophase pitch based composite carbon fiber. Compared with pure mesophase pitch, the graphene / mesophase pitch based composite carbon fiber prepared with the method has unchanged initial heat weight loss temperature, basically identical rheological properties, improved tensile strength and yield strength and basically unchanged conduction performance and modulus.