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155 results about "Moisture distribution" patented technology

Internal moisture distribution forecast method of proton exchange membrane fuel cell

ActiveCN106960970AIn line with the actual situationFully reflect the mutation phenomenonFuel cellsGas phaseMoisture distribution
The invention discloses an internal moisture distribution forecast method of a proton exchange membrane fuel cell. The internal moisture distribution forecast method is used for building a three-dimensional numerical value model and performing solving calculation and comprises five steps of building and calculating a conservation equation of membrane-state water Lamba distribution situation in a proton exchange membrane and a catalytic layer; building and calculating a conservation equation of water distribution situation in a gas diffusion layer, a micropore layer and the catalytic layer; solving liquid-state water distribution in a runner of the fuel cell; defining mass conservation of two sides of an interface of the runner and the gas diffusion layer; and building an energy conservation equation in an integral calculation domain, and acquiring temperature distribution. Simulation calculation is performed on flowing of a gas phase and a liquid phase in the runner of the proton exchange membrane fuel cell by a two-phase flow model, surface tension and a wall-surface absorption effect are considered, the flowing of a gas phase and a liquid phase in a membrane electrode (the gas diffusion layer, the micropore layer, the catalytic layer and the proton exchange membrane) is combined with the flowing of a gas phase and a liquid phase in the runner of the proton exchange membrane fuel cell by a special method, and a method for forecasting the distribution of the internal whole water in a single proton exchange membrane fuel cell under a given working condition by numerical value calculation is provided.
Owner:TIANJIN UNIV

Ectopic coupled repairing system and method for treating organic compound contaminated soil

The invention provides an ectopic coupled repairing system and method for treating organic compound contaminated soil. The system comprises a contaminated soil pile body, a nutrient solution and moisture distribution pipe network connected with the contaminated soil pile body, as well as an air exhaust and tail gas treatment pipe network connected with the contaminated soil pile body, wherein the contaminated soil pile body comprises a concrete base layer spreading on an open field, a first layer of geotextile which is spread on the concrete base layer, a first layer of a high-density polyvinyl chloride impermeable membrane which is spread on the first layer of geotextile, a second layer of geotextile which is spread on the first layer of the high-density polyvinyl chloride impermeable membrane, a gravel gas conductive layer which is spread on the second layer of geotextile, a third layer of geotextile which is spread on the gravel gas conductive layer, contaminated soil piled on the third layer of geotextile, as well as a second layer of the high-density polyvinyl chloride impermeable membrane covering on the contaminated soil. The repairing system can be used for repairing large-scale volatile organic matter and biodegradable organic matter compound contaminated soil with low cost, and is suitable for large-scale industrial application.
Owner:BEIJING MUNICIPAL RES INST OF ENVIRONMENT PROTECTION

Method for testing moisture distribution of asphalt mixture based on industrial computed tomography (CT)

ActiveCN103558236ADirect detection of moisture contentNo damageMaterial analysis by transmitting radiationMoisture distributionX-ray
The invention discloses a method for testing the moisture distribution of an asphalt mixture based on industrial computed tomography (CT), relates to a testing method for the internal moisture distribution of the asphalt mixture, and aims to solve the problem that a moisture distribution law cannot be intuitively and accurately acquired through an existing method for testing the moisture distribution of the asphalt mixture. The method for testing the moisture distribution of the asphalt mixture comprises the following steps: fixing a clamp made of a foam material onto an industrial CT machine supporting table; covering an X-ray outlet with a metal sheet; starting an industrial CT machine; placing a dry test piece into the clamp; debugging scanning parameters of the industrial CT machine; scanning the test piece, performing image reconstruction on a scanning result through software; analyzing size parameters of the test piece; soaking the dry test piece in water; performing image reconstruction and parameter analysis on the scanning result again; and setting an addition area of a non-clearance substance as a moisture distribution area so as to complete testing of the moisture distribution of asphalt. By virtue of the testing method, the moisture distribution can be visualized, and the measurement accuracy is improved.
Owner:HARBIN INST OF TECH

Robinia pseudoacacia sawn timber drying method

The invention discloses a robinia pseudoacacia sawn timber drying method, relating to the technical field of wood processing. The robinia pseudoacacia sawn timber is stacked before being dried. The drying method comprises the following steps: a. in a pre-heating treatment stage, the dry ball temperature is controlled to be 55-65 DEG C, the dry-wet ball temperature difference is controlled to be 1-2 DEG C and the treatment time is controlled to be 3-8 hours; b, in a drying stage, the moisture content is controlled to be over 30%, the dry ball temperature is 50-60 DEG C, and the dry-wet ball temperature difference is 2-3 DEG C; a humidity-regulating treatment stage is implemented when the moisture content reaches 8-12% after drying in a staging manner, wherein the dry ball temperature is controlled to be 75-85 DEG C, the dry-wet ball temperature difference is controlled to be 3-5 DEG C, and the treatment time is controlled to be 6-12 hours; d, in a cooling stage, the sawn timber is cooled within a temperature which is higher than an outdoor temperature by 20 DEG C, and the dry-wet ball temperature difference is kept within 6-10 DEG C. According to the drying method, the dried robinia pseudoacacia sawn timber which is uniform in moisture distribution, small in residual drying stress, cannot easily deform and crack in later process and use is obtained.
Owner:INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY

Pole and tower impact grounding resistance measurement method considering soil space moisture distribution

The invention provides a pole and tower impact grounding resistance measurement method considering soil space moisture distribution. The method comprises the following steps of 1) investigating measured pole and tower information; 2) according to a site condition, constructing a soil space moisture distribution test system; 3) selecting points and detecting a surrounding soil moisture distributioncondition of a measured grounding network; 4) calculating and acquiring an influence weight of data of each measurement point on an integral impact grounding resistance; and 5) according to test point soil water content data, calculating and acquiring the impact grounding resistance of a pole and tower ground in different soil space moisture distribution. In the invention, based on an actual workcondition, the impact grounding resistance when soil space moisture distribution is unbalanced can be accurately calculated and acquired; through calculating the impact grounding resistance, a line operation state when a pole and tower is hit by lightning strike can be effectively determined; and a test platform is easy to arrange, is simple and effective, and is suitable for various conditions.
Owner:FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID

Method for quantitatively detecting solid fermentation moisture distribution uniformity through hyper-spectral image technology

The invention relates to a method for quantitatively detecting solid fermentation moisture distribution uniformity through the hyper-spectral image technology, and belongs to the technical field of food and agricultural product fermentation relative parameter detection. Firstly, a hyper-spectral image of multiple fermentation substrates under a certain waveband is collected; image information of a region-of-interest is extracted, and fixed wavelength points and corresponding spectrum data in the waveband are selected; n characteristic wavelengths are screened; a prediction model relation expression of moisture content is built according to spectrum reflection values under the characteristic wavelengths and moisture content measured values of all the fermentation substrates; by means of the built relation expression, the moisture content corresponding to each pixel point in the spectral image of the fermentation substrates is detected, and a two-dimensional distribution graph of the moisture content is drawn; the variance value of moisture distribution is calculated; the moisture distribution uniformity of the fermentation substrate is detected according to the variance value of moisture distribution. The method reduces detection cost, increases detection speed, is suitable for online monitoring, and quickly and quantitatively detects moisture distribution uniformity of the fermentation substrate.
Owner:JIANGSU UNIV

Device for aerosol cultivation of tea tree

The invention relates to a device for aerosol cultivation of a tea tree. The device comprises a sensing device and a central processing device which is used for receiving data detected by a sensor, performing data processing and controlling the action of an actuating member, wherein the sensing device consists of a humidity and temperature sensor arranged at the rooting zone of the tea tree and used for detecting water film and moisture distribution on the surface of the rooting zone of the tea tree and an ambient temperature and an analogue sensor used for detecting the absorption and the evaporation of moisture on the root of the tea tree; the signal output ends of the humidity and temperature sensor and the analogue sensor are connected with the signal input end of the central processing device; and the signal output end of the central processing device is connected with the signal input end of the actuating member. By adopting the device, mist strength and time as well as the adding time and amount of nutrient fluid can be accurately adjusted according to the growth status, different development stages and the changes of ambient temperature and humidity of the tea tree, so that the growth of the tea tree is promoted efficiently and safely in a polynary way, and tea tree roots are harvested continuously throughout the year.
Owner:黄山先农生物科技有限公司

Non-phosphorus water-retaining agent suitable for freezing storage of tilapia fillets and application thereof

The present invention relates to a non-phosphorus water-retaining agent suitable for freezing storage of tilapia fillets and an application thereof. The provided non-phosphorus water-retaining agent suitable for the freezing storage of the tilapia fillets comprises the following components in percentages by mass: 2%-8% of trehalose, 0.5-2.5% of potassium bicarbonate, 0.5%-2.5% of chitosan, and the balance being water. The non-phosphorus water-retaining agent preferably consists of the following components in percentages by mass: 4% of trehalose, 1.2% of potassium bicarbonate, 0.2% of chitosan and the balance being water. After the application of the non-phosphorus water-retaining agent, the freezing stored tilapia fillets are relatively good in moisture distributions, and the non-phosphorus water-retaining agent effectively avoids moisture loss during freezing storage and enables the comprehensive quality of the freezing stored tilapia fillets to maintain very well. The present invention also discloses the application of the non-phosphorus water-retaining agent suitable for the freezing storage of the tilapia fillets. The concrete application method is simple in steps and high in operability.
Owner:GUANGDONG OCEAN UNIVERSITY

Drying method for pometia pinnata solid wood floor blanks

The invention discloses a drying method for pometia pinnata solid wood floor blanks, and relates to the field of wood processing. Before drying is performed, the pometia pinnata solid wood floor blanks are firstly stacked and then placed in a drying kiln; the drying method comprises the steps that 1, preheating processing is performed, the temperature of dry balls is controlled at 50 DEG C-60 DEG C, and the temperature difference of the dry balls and wet balls is controlled to be 1 DEG C-2 DEG C, and the processing time is controlled in 6-12 hours; 2, when the moisture content is more than 30%, is at 25-30%, 20-25% and 15-20% and is lower than 15%, the different temperature of the dry balls and the different temperature differences of the dry balls and the wet balls are controlled; 3, stress relieving processing is performed, the temperature of the dry balls is controlled at 80 DEG C-88 DEG C, the temperature difference of the dry balls and the wet balls is controlled at 4 DEG C-5 DEG C, and the processing time is controlled in 8-15 hours; 4, the temperature is lowered to be less than 20 DEG C higher than the outdoor temperature, and in the temperature lowering process, the temperature difference of the dry balls and the wet balls is kept at 6 DEGC-10 DEG C, and then the pometia pinnata solid wood floor blanks which are even in moisture distribution, small in residual stress and not prone to deforming and cracking in later processing and using are obtained. In the drying process, insect pests in the floor blanks can be killed, and therefore the service life is prolonged.
Owner:RES INST OF FORESTRY NEW TECH CHINESE ACAD OF FORESTRY

Planting bed irrigation device utilizing capillary action of planting medium

The invention relates to a planting bed irrigation device utilizing the capillary action of a planting medium, belonging to the field of hydraulic engineering, wherein the IPC international patent class number is E02B 13/00. The planting bed irrigation device comprises a planting nursery bed, a nutrient fluid tank, a water supplying and pressurizing device, a water supply pipeline, a fertilizing device, a water discharging pipeline, an ultraviolet disinfection device, an intelligent controller and the like. The irrigation water treated by the ultraviolet disinfection device enters the nursery bed under the control of the intelligent controller. After optimal soaking time is achieved, a water discharging valve is opened, and the residual water enters a water storage tank by a discharged water collecting system and then treated by the ultraviolet disinfection device to be qualified so as to be used as water for next nursery bed or next irrigation. By adopting the planting bed irrigation device provided by the invention, the problems that the utilization efficiency of irrigation water is low, water distribution in the planting medium is not uniform, the relative humidity in the facility is not easy to control, the nutrient fluid is easily sprayed to flowers and leaves to cause burn and influence economic benefit, the labor management and maintenance cost is high and the like of the traditional irrigation technique for the facility flowers are overcome.
Owner:BEIJING WATER SCI & TECH INST

High-frequency soil moisture measuring instrument

The invention provides a high-frequency soil moisture measuring instrument which comprises a nonmetallic n-head square thread bushing, a high-frequency electric converter, a scattered field capacitance sensor, an intelligent display system and a microporous through dielectric constant epsilon piece, wherein, three metal electrodes are sequentially embedded into the nonmetallic multi-head square thread bushing, lead holes of the electrodes are drilled on a three-electrode terminal, and three signal leads are led to the lead holes of the electrodes via lead through holes of the electrodes and welded firmly; the signal leads are correspondingly connected with a signal input terminal of the high-frequency electric converter, and a signal output terminal of the high-frequency electric converter is correspondingly connected with a signal input terminal in the intelligent display system; and a contact surface of the electrodes and the microporous through dielectric constant epsilon piece takes a half of the surface of the electrodes as a working surface, and the microporous through dielectric constant epsilon piece is arranged in the middle of the scattered field capacitance sensor and the measured soil. The measuring instrument has the advantages of simple and compact structure, being capable of realizing continuous measurement or discontinuous measurement of moisture at any point on a vertical section and conveniently obtaining a moisture distribution measuring result of the soil vertical section.
Owner:HOHAI UNIV

Digital full functional water nozzle test system

InactiveCN101915664AWater distribution is accurately measuredEconomical, convenient and intuitiveMachine part testingServomotorsMoisture distributionSpray nozzle
The invention discloses a digital full functional water nozzle test system, which comprises a circulating energy station providing power for a test, a moisture console used for realizing moisture distribution, throttling and counting and a field simulation nozzle water content distribution test bed. The three parts are independent from one another and connected sequentially by pipeline interfaces; all metering devices adopt digital intelligent meters and collect corresponding data which can be input in a computer for processing; the structural styles of the flow distributor of the field simulation nozzle water content distribution test bed are grooves separated by parallel guide plates with the same width; and a transparent glass container below is used as a metering device. By using the system, the flow of a single nozzle and the relation between the spray angle and the flow distribution can be not only measured, also the test of the relation between the spray flow and the flow distribution can be carried out under the condition that a plurality of nozzles mutually interfere; the optimal design of the nozzle can be carried out secondarily, and the digital full functional water nozzle test system has the characteristics of high digitization degree and strong function.
Owner:BEIJING MECC HYDRAULIC +1

Vertical type damp-heat and speed-controlled thin layer drying experiment stand and drying method thereof

The present invention discloses a vertical type damp-heat and speed-controlled thin layer drying experiment stand. The experiment stand comprises: a shell body, a liner, a material warehouse and a sensor set. An air distribution opening, a moisture distribution opening, a moisture removing fan, a first warehouse sealing door and a second warehouse sealing door. Drying medium enters into the shell body from the air distribution opening and discharges from the shell body from the moisture removing fan. The receiving space of the liner is a drying medium flow path and the liner is fixed in the shell body; a material warehouse tray is arranged at the lower part of the liner corresponding to the first warehouse sealing door and a sensor warehouse is arranged at the lower part of the liner corresponding to the second warehouse sealing door. Dried grains can be placed in the receiving space of the material warehouse and the material warehouse is connected to the material warehouse tray. The sensor set consists of a temperature sensor, a humidity sensor, a wind speed sensor and a wind pressure sensor, and is arranged in the liner. The drying experiment stand can provide the optimal parameter ratios for drying experiment methods, thereby reaching the ultimate purposes of increasing drying efficiency of dryers, reducing energy consumption, and ensuring drying quality.
Owner:JILIN UNIV
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