1738 results about "Heat balance" patented technology

The invention relates to a temperature measurement and calibration platform in space vacuum environment. The temperature measurement and calibration platform is favorable for realizing the simultaneous calibration of contact type temperature measurement and non-contact type temperature measurement, so the temperature measurement and calibration platform is served for heat vacuum and heat balance experiments of spacecrafts such as satellites, spaceship and the like. The temperature measurement and calibration platform comprises a constant temperature bath, wherein a double-sub-cavity vacuum cavity, the double-sub-cavity vacuum cavity comprises a first vacuum cavity body and a second vacuum cavity body, the first vacuum cavity body and the second vacuum cavity body are connected with a vacuum pumping device through a three-way valve, standard temperature indicator sensors are respectively arranged on the outer wall of the first vacuum cavity body and on the outer wall of the second vacuum cavity body, the standard temperature indicator sensors are connected with a temperature secondary meter, a laser light path reflecting device is arranged in the vacuum cavity of the first vacuum cavity body for calibrating a non-contact type temperature measuring system based on the tunable diode laser absorption spectrum technology, and the vacuum cavity of the second vacuum cavity body is used for accommodating a temperature sensor for calibrating a contact type temperature measuring system adopting the temperature sensor.

The invention relates to a centralized heating whole-network heat balance control method, in particular to a control system which is charged on area, which can eliminate the heat imbalance of the whole network and balance the heating effect. The control method adopts different control strategies for a heat source and two links of a primary side in the heating system so as to meet the requirement of users. For the heat source, the online prediction of the heat load is realized according to external temperature variation, and a running instruction is supplied for the heat source; a uniform control strategy is adopted for a primary network, automatic adjustment of a primary valve of a heat exchanging station of the heat network can be realized, a weighted value can be manually given to a special heat exchanging station, and the heat imbalance degree is used for analyzing and evaluating a whole-network heat balance control effect; and the control method can effectively solve the problems of the heating system such as imbalance heat and energy waste, a great amount of manpower and material resource can be saved in the adjustment process of the heat network, and the balance and consistency of the heat supply effect can be guaranteed.

The embodiment of the invention provides a reflective heat-insulation coating and a preparation method thereof. The reflective heat-insulation coating comprises the following raw materials of aqueous pure crylic acid resin, aqueous elastic resin, titanium dioxide, ceramic hollow microspheres, infrared powder, a flame retardant, water, an organic dispersant, a film-forming additive, an antifreeze, a thickener, an anti-foaming agent, a wetting agent, a preservative and a pH value regulator. The coating is a single-component aqueous coating, has no toxicity and good weatherability; extremely fine hollow microsheres are closely arranged by multi-stage in the coating to form a vacuum layer so as to have extremely strong reflection and obstruction function to the solar radiation heat and can effectively reduce the radiation heat transfer and convection heat transfer, thus reducing the heat balance temperature on the surface of the article. The reflective heat-insulation coating leads the building space and the facility container to be warm in winter and cool in summer, reduces the heat island effect and energy consumption of the air conditioner, has obvious energy-saving effect, and reduces the surface temperature by 20 DEG C to a maximum extent and reduces the internal temperature by 5-10 DEG C compared to the normal coating.

The invention provides a method for producing light olefins and monocyclic aromatic hydrocarbons from heavy hydrocarbons. The method produces qualified catalytic cracking raw materials through hydrogenation by taking wax oil and residual oil as raw materials, returns light cycle oil and heavy cycle oil which are catalytic cracking by-products to a hydrogenation unit for the catalytic cracking rawmaterials at the same time, hydrogenates the catalytic cracking by-products together with the catalytic cracking raw materials, and then takes the obtained product as the catalytic cracking raw materials to produce light olefins and monocyclic aromatic hydrocarbons. By introducing the residual oil before a second reaction zone of hydrogenation, the method widens the sources of the catalytic cracking raw materials, increases the processing amount of low-value residual oil, and solves the problem of the heat balance of catalytic cracking units. The light and heavy cycle oil of catalytic cracking is introduced into the hydrogenation unit, hydrogenated and then taken as the catalytic cracking raw materials, so that the yield of high-value products of the catalytic cracking units can be increased, and the deactivation of hydrogenation catalysts is delayed.

The invention provides a method and a device for improving the accuracy and energy-saving efficiency of an 'on-off time-area process' heat allocation system. The device comprises total heat supply metering devices arranged in building heat supply pipes and room temperature controllers and electrical heat balance flow regulating devices which are installed by heat supply users respectively, wherein the room temperature controllers are arranged at reference positions in heating areas of the users; and the electrical heat balance flow regulating devices comprises on-off control valves which are arranged in house branch heat supply pipes of the users. The room temperature controllers monitor indoor temperatures, and the electrical heat balance flow regulating devices control the flows in the heat supply pipes and the opening and closing of the heat supply pipes, and calculate and store the total opening time length of on-off control valves.

The invention relates to a method for flexibly adjusting catalytic cracking reaction-regeneration system heat balance. A conventional regenerated catalyst heat remover which is arranged beside a regenerator and a regenerated catalyst cooler which is arranged on a regenerated catalyst conveying pipe are coupled and linked so that the catalyst bed temperature in the regenerator is controlled in oneaspect to solve the problem of catalyst inactivation because of overhigh temperature caused by great scorching amount in a traditional heavy oil catalytic cracking device and too much heat in the regenerator, and the carried heat and the temperature of the regenerated catalyst entering a lifting pipe reactor are adjusted in the other aspect to adjust ratios of different catalyst and oil needed for raw materials with different properties in cracking reactions. The invention takes heat and adjusts the temperatures of high-temperature regenerated catalysts in different positions in a traditionalheavy oil catalytic cracking device and flexibly adjusts the reaction-regeneration system heat balance so as to optimize heavy oil catalytic cracking process conditions and remarkably improve the yield of light oil and liquid.

Char-handling processes for controlling overall heat balance, ash accumulation, and afterburn in a reheater are provided. Carbonaceous biomass feedstock is pyrolyzed using a heat transfer medium forming pyrolysis products and a spent heat transfer medium. The spent heat transfer medium is separated into segregated char and char-depleted spent heat transfer medium. The char-depleted spent heat transfer medium is introduced into a dense bed of heat transfer medium fluidized by a stream of oxygen-containing regeneration gas. All or a portion of the segregated char is combusted in the dense bed using the stream of oxygen-containing regeneration gas. A portion of the segregated char may be exported out of the pyrolysis system to control the overall heat balance and ash accumulation.

The invention provides an application method of cold field plasma discharge assisted high energy ball milled powder and a plasma assisted high energy ball milling device using the cold field plasma discharge assisted high energy ball milling method. The method comprises the following steps: utilizing dielectric barrier discharge to generate plasmas, introducing a dielectric barrier discharge electrode bar into a high-speed vibrating ball-milling tank, on one hand, requiring a solid insulating medium on the outer layer of the electrode bar to simultaneously bear high-voltage discharge and mechanical shock failure of the grinding ball, and on the other hand, requiring the high-speed vibrating ball milling device to uniformly process the powder. The method is based on the ordinary ball milling technology; the processing efficiency and the effect of the ball mill can be greatly improved by the following steps: under a non-heat-balance discharge condition of the pressure that the discharge space pressure is set to be about 102-106 Pa, introducing the discharge plasmas to input another effective energy to the processed powder, promoting the powder to be processed to be subjected to combined action of the mechanical stress effect and the heat effect of the external electric field, and further accelerating refining of the powder and promoting the alloying progress.

The invention relates to a real-time cold load determination method of an air-conditioner room. The method is as follows: on the basis of the heat balance process of a room system, determining a cold load model structure, measuring the actual conditions of real-time cold supply amount input of an air conditioner and room temperature response, identifying model parameters, establishing a real-time cold load model, and calculating real-time cold load in the air-conditioner room. By utilizing the real-time cold load determination method, precise and reliable real-time cold load requirement data can be provided for operation and control of the air conditioner, the problems that the heat-transfer mechanism modeling method and the prediction method need a large amount of priori knowledge and historical data and is difficult to cover dynamic influence factors of the load and the like are avoided, and the real-time cold load requirement of the air-conditioner room can be reflected in real time. The real-time cold load determination method is wide in application range and strong in real-time property, and can be widely applicable to the aspects of energy conservation control at the operating stage of the air conditioners and energy conservation modification of the air conditioners of old buildings and the like.

The invention provides an engine heat balancing performance bed tester and an engine heat balancing performance bed testing method, which belong to the field of engine heat balancing technology. The tester provided by the invention comprises an engine bed system, an external cooler and a signal feedback controller; the external cooler is used for cooling built-in cooling devices of a currently tested engine; the signal feedback controller is used for presetting an engine temperature threshold and testing time, monitoring the temperature of the currently tested engine in real time, ordering the engine bed system to control the external cooler to regulate the cooling speed of the built-in cooling devices of the currently tested engine when the temperature of the currently tested engine reaches the preset engine temperature threshold and evaluating the heat balancing performance of the currently tested engine according to the temperature data of the currently tested engine within the testing time. The testing scheme provided by the invention can conveniently and efficiently carry out real-time on-line tests on the engine heat balancing performance of automobiles.

The invention discloses a dual-fuel engine controller simulation test system, and is used for realizing an HIL test of an HPDI engine controller. The system includes a real-time simulator and an engine controller, wherein the real-time simulator is used for operating an environmental model, a driver model and a full vehicle model, sending vehicle environment parameters output by the environmental model, driver behavior parameters output by the driver model and each vehicle operating parameter output by the full vehicle model to the engine controller, and receiving a control signal sent by the engine controller, and continuing to operate the environmental model, the driver model and the full vehicle model according to the control signal, and the full vehicle model includes a dual-fuel engine model (including a gas circuit model, a fuel supply model, a cylinder combustion model, and a heat balance model), an accessory model, a drive system model, and a vehicle longitudinal power model. The engine controller is used for determining the operating condition of the engine according to the vehicle environment parameters, the driver behavior parameters and the vehicle operating parameters and generating and sending the control signal.

The invention relates to a thermal resistance measuring method for a semiconductor device. The thermal resistance measuring method includes the following steps that (1) according to the structure of the semiconductor device, a main heat conduction channel is determined, and a constant temperature plane good in contact is arranged on the surface of a shell of the main heat conduction channel; (2) certain power is loaded to the semiconductor device, after the semiconductor device reaches heat balance, it is switched to the situation that measuring power is loaded to the semiconductor device, temperature-sensitive parameters of the semiconductor device are measured in real time to obtain the junction temperature for measuring the semiconductor device, and accordingly a transient thermal response curve of the semiconductor device is obtained; (3) according to the transient thermal response curve, the thermal resistance from a junction of the semiconductor device to the shell is determined. According to the thermal resistance measuring method for the semiconductor device, heating power is loaded through a P zone and an N zone of a substrate of the semiconductor device, the junction temperature is measured by the utilization of a PN junction assembly existing in the semiconductor device, and therefore the transient thermal resistance of integrated circuit products without temperature-sensitive diodes and the transient thermal resistance of non-power integrated circuit products can be measured accurately.

The invention discloses a water cooling method for a vehicle lithium power cell set and a device thereof. Besides that the surface of the lithium power cell set is mounted with a water cooling radiating device, one side of each cell core shell is directly mounted with an internal water cooling radiating device during production, and the internal water cooling radiating device of the lithium power cell set and the cell monomer is distributed at intervals. The invention combines the original water cooling radiating device of the lithium power cell set to realize the requirement of all-round and balanced heat radiation for the lithium power cell set and overcome the defect of poor heat radiation performance among the cell monomers on the existing lithium power cell set. The internal water cooling radiating device is simple in manufacturing, convenient in processing and has obvious radiating effect, thus improving the safety and reliability in the use process of the lithium power cell set, realizing the heat balance management in the water cooling process, and being applicable to the vehicle and vessel lithium power cell set featuring simplicity, practicality and reliability thereof.

Device and method for the detection and/or diagnosis of faults in a process, equipment and sensors used to measure and control variables of a process, either for single faults or multiple faults. The detection and/or diagnosis are performed on the basis of residual calculation between measured values and values calculated by a plurality of parallel linear models, built up from the existing correlations between the measured variables by the process sensors and by different equations that rule the process, such as mass and heat balances, quality relationships, etc. A fault in a model (i.e. the obtainment of a residual anomaly high by comparing the model estimation and the measurement), increases the probability that some of the parameters or faults associated to that model are failing. When all models in which a participating parameter fail or show a high probability of failure, the anomaly rate of said parameters is maximum. Using said rates and a description of cause-consequence relationship between the parameters a fault probability is obtained, where the root cause of the problem is indicated, indicating the consequences produced in the process. The device comprises data storage means; pre-processing means for filtering data; means for generation and storage of multiple behavior models; residual calculation means for calculating the difference between the measured and the predicted values of the variables; analysis means for determining the need to communicate an anomalous situation; communication means for presenting a process status report.

The invention relates to a prediction method of remaining bath time of a water storage type electric water heater. The prediction method comprises the following steps of extracting the flow, hot water outlet temperature, liner temperature and cold water inlet temperature at a water consuming moment within a certain sampling period for the water storage type electric water heater; respectively calculating change rates of the hot water outlet temperature and the liner temperature by adopting a least-squares linear fitting method; using the flow, the hot water outlet temperature, the liner temperature, the cold water inlet temperature and the change rates of the hot water outlet temperature and the liner temperature as neural network input quantities, and estimating the amount of remaining equivalent bath water through neural network computation; calculating the water consuming rate of the amount of the equivalent bath water according to a heat balance law and the flow, the hot water outlet temperature and the cold water inlet temperature which are extracted by current sampling; finally, dividing the estimated amount of the remaining usable equivalent bath water by the water consuming rate of the amount of the equivalent bath water so as to obtain the remaining bath time. According to the prediction method, the remaining bath time can be accurately estimated, so that the user bath quality is increased, and the user experience is improved.

The invention discloses a method for measuring liquid thermal conductivity coefficient and the device thereof. The invention adopts homeostasis hotline principle to measure liquid thermal conductivity coefficient. The calculation formula of the liquid thermal conductivity coefficient is used when different heat sources are applied under the condition of one dimensional conduction respectively deduced by Fourier heat conduction basic law. Then the heat generated by the heating resource which is transmitting heat. And the liquid thermal conductivity coefficient is calculated by measuring the temperature difference at particular points in heat conduction direction when heat balanced. High-temperature resistant coaxial double-layer pipes are used as outer pipes while heat stable heating tube used as inner pipes. Liquid to be measured is packed in the space between the inner and the outer pipes. The ratio of the length of the outer pipe to the external diameter of the outer pipe exceeds is greater than 10. The way of heating of the inner pipe adopts constant-temperature and uniform-speed circulating water or tempering wire and filled with high temperature resistant liquid at the same time. The former is suitable for common liquid and the latter for high temperature flammable liquid. The invention has the advantages of simple structure, large serviceable range and high accuracy rating, thus measuring the coefficients of heat conductivity of various liquids simply and precisely is possible.

The invention discloses a determination method of copperplate heat flux based on mass balance and heat balance continuous casting mould, which belongs to the field of numerical calculation and application in ferrous metallurgical continuous casting process. The method comprises the steps of (1) acquiring raw data, (2) acquiring the consumption rate of mould powders,(3) acquiring molten slag layer thickness (d1) and solid slag layer thickness (ds) by utilizing the equation models of mass balance and heat balance,(4) acquiring heat-flow density q, (5) constructing the physical model of crystallizers, calculating thermocouple temperature Tc and comparing the calculated value Tc with the measured value Td. The above method has the advantages of coupling the mass balance of mould powder consumption and the energy balance of molten steel heat transfer. According to the method of the invention, specific boundary condition equations are obtained by regression method after the temperature and heat flow value of specific locations being determined, without being heavily dependent on specific equations of heat transfer boundary.

The invention relates to an energy-saving evaporating process and equipment for a L-phenylalanine brine solution, belonging to the technical field of efficient energy saving and environmental protection. The process comprises the following steps of: preheating a 1 percent concentration of feed solution to 50-60 DEG C with a preheater 4; making the preheated feed solution enter the tube pass and shell pass of a falling film evaporator 7 and a climbing film evaporator 8 for secondary vapor heat exchange at 78-80 DEG C, heating to 70 DEG C, and evaporating in a way of combining a falling film with a climbing film to generate secondary vapor and a concentrated solution; making the secondary vapor and the concentrated solution enter a separator 9 for vapor-liquid separation; making the separated secondary vapor enter a centrifugal compressor 10 for compressing and increasing caloric content, heating to 78-80 DEG C for serving as a heating source of the evaporators 7 and 8, and heating and evaporating the feed solution; discharging the concentrated solution of which the concentration is controlled at 3 percent from the separator 9, and returning the concentrated solution of which the concentration does not reach 3 percent to the climbing film evaporator 8 for continually evaporating and concentrating. The system has the advantages of self-heat balance, small using amount of live vapor, low running cost, high efficiency and saving in energy.

The invention belongs to the technical field of flue gas acid making, in particular to an acid making system suitable for high-concentration sulfur dioxide-containing flue gas. The acid making system comprises a main system used for converting sulfur dioxide-containing flue gas of which the sulfur dioxide concentration is lower than the set sulfur dioxide concentration value for making acid, and a pre-conversion and absorption system used for treating the sulfur dioxide-containing flue gas of which the sulfur dioxide concentration is at least equal to the set sulfur dioxide concentration value into sulfur dioxide-containing flue gas of which the sulfur dioxide concentration is lower than the set sulfur dioxide concentration value, and mixing the treated sulfur dioxide-containing flue gas of which the sulfur dioxide concentration is lower than the set sulfur dioxide concentration value with sulfur dioxide-containing flue gas of which the sulfur dioxide concentration is at least equal to the set sulfur dioxide concentration value and which is about to enter the system, so that the sulfur dioxide concentration value of the flue gas which finally enters the main system is lower than the set value. By the acid making system, diluent air quantity supplemented to the main system is small or even diluent air is not needed to be supplemented; and pre-conversion reaction heat is fully utilized to maintain the heat balance of the whole system, and the load of the main system is not increased through pre-absorption, so that a large amount of equipment investment and operating cost are saved.