240 results about "Kilowatt-Hour" patented technology

An optimization and control system for a utility plant that uses fan based air cooled condensers controls the operation of the power generation system at the plant in conjunction with the operation of the air cooled condensers so as to run the power plant at an optimum operating point associated with minimizing or reducing the cost of each kilowatt-hour of energy or other useful energy produced by the plant. The optimization and control system includes an optimizer having a numerical solver that determines values for a set of control variables associated with an optimal operating point of the plant and an expert system that oversees and modifies the control variable settings prior to providing these settings to a plant controller. The numerical solver uses an objective function and one or more models of plant equipment to determine the operating point of the plant that minimizes the cost per unit of useful energy generated by the plant. As part of determining the optimal plant operating point, the numerical solver may determine the number of fans to run within the air cooled condensers of the plant and/or the speed of the fans to use in the air cooled condensers in conjunction with the amount of fuel to burn in the boiler, the desired temperature of the steam at the input of the steam turbine, etc., all required to produce a given amount of power (load demand) at the particular environmental conditions currently experienced at the plant. The expert system may modify these outputs by determining which fans to actually use at any particular time based on, for example, the availability of or the operational status of the fans, the wear of the fans and fan motors, etc.

The method included herein is an alternative energy wireless solar panel wind turbine communication server appliance node mechanism with built in communications server array, wireless energy and communications mechanism with protection, sharing, storage, accessing, authentication, battery management, certification, processing attachment and tracking mechanisms. The method and mechanism is utilized via networked servers, solar panels, and wireless electronic devices (online and offline) as well as mobile (wireless) communications devices built into one waterproof, temperature, controlled self-sensing hardware package. The method and mechanism also works as part of a kilowatt hour banking system, and thermal passive solar control mechanism for living spaces.

The present invention proposes a hybrid methodology and apparatus between photovoltaic (PV) and concentrated photovoltaic (CPV) solar panels to lower the photovoltaic solar energy production cost. In particular, the disclosed methodology addresses a simple quasi-parabolic trough PV (QPTPV) low concentration system with greater tolerance to tracker pointing errors. The quasi-parabolic trough (QPT) reflector is defocused to cover the width of a linear solar cells array, which is reduced from a large rectangular solar cells panel. In summary, the QPTPV system consists of low cost quasi-parabolic reflectors, a compact linear PV cells array and a lower cost relaxed pointing 2-axes tracker. The combination of these low cost technologies disclosed can achieve the lowest cost per kilowatt hour of photovoltaic energy production.

The invention discloses a real-coded genetic algorithm-based optimizing method for the micrositing of a wind power station. In the method, the measured wind speed in the wind farm is corrected by an index model in the direction of relative height; a power characteristic curve of a wind machine is discretized by a linearized method; for the wake flow of the wind machine, a linearized wake flow model is adopted; the wind speed of the wind machines at the wake flow of a plurality of wind machines is solved by a method of the summation of squared differences, when part of the wind machines are positioned in the wake flow, the wind speed is revised by a method of area coefficients; based on an optimizing target function of the micrositing in the design of the wind power station, when the total number of the wind machines in the wind power station is determined, the total generated energy is used as the target function, and when the total number of the wind machines in the wind power station is not determined, the kilowatt-hour cost is used as the target function; and the microcosmic arrangement site of each wind machine in the wind power station is obtained by the real-coded genetic algorithm-based optimizing method. By the method, the reliability of forecast is high, the optimizing efficiency is high and results are accurate.

Processes disclosed are capable of converting biomass into high-crystallinity nanocellulose with surprisingly low mechanical energy input. In some variations, the process includes fractionating biomass with an acid (such as sulfur dioxide), a solvent (such as ethanol), and water, to generate cellulose-rich solids and a liquid containing hemicellulose and lignin; and mechanically treating the cellulose-rich solids to form nanofibrils and/or nanocrystals. The total mechanical energy may be less than 500 kilowatt-hours per ton. The crystallinity of the nanocellulose material may be 80% or higher, translating into good reinforcing properties for composites. The nanocellulose material may include nanofibrillated cellulose, nanocrystalline cellulose, or both. In some embodiments, the nanocellulose material is hydrophobic via deposition of some lignin onto the cellulose surface. Optionally, sugars derived from amorphous cellulose and hemicellulose may be separately fermented, such as to monomers for various polymers. These polymers may be combined with the nanocellulose to form completely renewable composites.

The invention relates to a kilowatt-hour meter image automatic identification method which comprises the following steps: 1. image preprocessing: detecting vertical texture of a panel image by using Sobel operator, preliminarily removing the background area by a projection method, extracting the area with abundant vertical texture by an expansion method, and carrying out binarization treatment on the image by a adaptive threshold segmentation method based on an integral projection method; 2. precise positioning of indicating value and bar code: by combining an intelligent judgment method on the basis of indicating value intervals and length-width ratio characteristic of numeric characters under the complex image background, adapting to precise positioning of indicating values of different types of kilowatt-hour meters on the basis of vertical edge detection of the Sobel operator and morphological treatment; carrying out horizontal scanning on the bar code area to extract the bar code characteristic area; 3. bar code identification: identifying different character bar codes by using a similar edge distance normalization method; and 4. indicating value identification: extracting the indicating value by a PCA (principal component analysis) method. By using the PCA character recognition method, various character indicating values can be precisely identified, including identification of half-character.

Processes disclosed are capable of converting biomass into high-crystallinity nanocellulose with surprisingly low mechanical energy input. In some variations, the process includes fractionating biomass with an acid (such as sulfur dioxide), a solvent (such as ethanol), and water, to generate cellulose-rich solids and a liquid containing hemicellulose and lignin; and mechanically treating the cellulose-rich solids to form nanofibrils and/or nanocrystals. The total mechanical energy may be less than 500 kilowatt-hours per ton. The crystallinity of the nanocellulose material may be 80% or higher, translating into good reinforcing properties for composites. The nanocellulose material may include nanofibrillated cellulose, nanocrystalline cellulose, or both. In some embodiments, the nanocellulose material is hydrophobic via deposition of some lignin onto the cellulose surface. Optionally, sugars derived from amorphous cellulose and hemicellulose may be separately fermented, such as to monomers for various polymers. These polymers may be combined with the nanocellulose to form completely renewable composites.

The invention discloses operation modes and a structure of a heat-circulation heat pump drying unit. The structure is characterized in that the drying unit comprises a heat recovery air duct which forms a sealed air flow circulation loop with the inner cavity of the drying oven, an evaporator is installed in the air duct, and an air regulator for regulating and controlling the air flowing through the evaporator is arranged in the unit. The operation modes are a heating mode and a heat-circulation dehumidification mode. In the early operation stage of the unit, the heating mode is started, the heat pump system absorbs heat from the atmosphere, so that the air in the drying oven is heated to achieve the preset temperature; and then, the unit operates the heat-circulation dehumidification mode, the high-temperature high-humidity gas in the drying oven flows through the evaporator in the air duct to be cooled and dehumidified and then flows back to the drying oven, the sensible heat and latent heat absorbed by the evaporator are released into the drying oven by a condenser, and the air regulator enables the ratio of the condensation air quantity to evaporation air quantity to be greater than 2 and controls the inlet/outlet air temperature difference of the evaporator to be 10-25 DEG C. The unit has the advantages of high average COP and high latent heat ratio in the heat absorbed by the evaporator; and the dehydrating amount per kilowatt-hour is 5 kilograms or above, so that the efficiency is enhanced by 70-130% as compared with the conventional heat pump drying.

A method and system for monitoring and analyzing the failure of power supply network is disclosed. Said method includes such steps as installing the current sensors respectively at the input branch terminal of power transmission line to be monitored and the outlet terminal of user's electric kilowatt-hour meter, using intelligent monitor to calculate the current difference, transmitting the result to master station, analyzing data, drawing the current difference-time chart, and failure analysis while warning or alarming.

An air conditioner system with multiple indoor units is composed of multiple indoor units, one outdoor unit shared by multiple indoor units, a kilowatt-hour meter for measuring the total electric consumption, and a display for displaying the electric consumption of each indoor and the total electric consumption of whole system. Its operation method is also disclosed.

A provider of standardized services is provided with guidance on the design of pricing structures for contracts regulating the provision of a commodity good between a supplier and a customer. These are contracts characterized by long duration and dedicated infrastructure. The provision of the commodity good is variable over time, and the rate of provisioning is continuously monitored. Examples are kilowatt hours in the case of electric energy and megabytes/second in the case of Web hosting.

The invention discloses a multi-head fully-automatic feed tapping machine which comprises a feed part, a tapping part and a control part, wherein the feed part comprises a feed disk frame and a feed vibration disk, and a material delivery pipe is arranged on the feed vibration disk; the feed vibration disk comprises a vibration host, an inner vibration disk and a product splitter plate; a tapping mechanism and a motor of the tapping part are arranged on a host frame, and a clamping mechanism is arranged below the tapping mechanism; the motor is connected with the tapping mechanism, and the material delivery pipe is connected to the clamping mechanism; and a cooling oil channel is arranged below the clamping mechanism. In the invention, the clamping mechanism controlled through a vibration feed mechanism, hydraulic pressure and an air cylinder is matched with the multi-head tapping mechanism; on one hand, the volume of the whole machine is greatly reduced, and consumed materials are reduced; on the other hand, the production efficiency of the machine is greatly improved; by taking a frequently used eight-head mode as an example, 1,700 granules can be produced with each kilowatt-hour of electricity; and compared with the traditional technology, the electricity can be saved by more than 60 percent, and the working efficiency is improved by more than 7 times, thus the machine conforms to the requirement for energy saving and environmental protection and is beneficial to the popularization and the application.

The invention provides a thermal power generating unit carbon emission accounting method based on field monitoring data. The method comprises the following steps of 1, selecting monitoring points; 2,installing a CO2 measuring instrument at a thermal power generating unit chimney outlet; 2, collecting monitoring data, wherein the monitoring data monitored by a CEMS and the CO2 measuring instrumentwhich are arranged at the chimney outlet is transmitted to a main station after being collected by a data collection module, and is stored by the main station; 3, calculating the CO2 emission amountper hour, wherein one hour serves as a calculating cycle, the monitoring data collected within one hour serves as the basis, the halting data and ultralimit data in the data are removed, and then theCO2 emission amount per hour is calculated; 4, counting the CO2 emission amount, wherein the CO2 emission amount of the unit hour serves as the basis, and the summarizing value of the CO2 emission amount is obtained through a summing operation; 5, calculating the strength of CO2 emission, wherein the unit CO2 emission strength means the CO2 emission amount every time when the unit generates one kilowatt hour, namely the ratio of the CO2 emission amount within the duration to the power generation amount within the duration.

The invention discloses a laboratory microgrid system which can provide lots of theoretical and experimental bases for large-scale and high-efficiency utilization of renewable energy sources and construction of the microgrid in China. The laboratory microgrid system comprises a dummy bus; corresponding interconnection switches on the dummy bus are respectively connected with an analog wind power generation system, an analog solar power generation system, an analog generator system, an analog storage battery energy storage system, an analog load system and an analog electric power quality control system; the dummy bus is also connected with a power transmission network through a corresponding interconnection switch by virtue of a bidirectional kilowatt-hour meter; and thus the laboratory microgrid system is formed. A microgrid controller is connected with all the interconnection switches, carries out control operations according to one or more of grid-connected operation control strategy or stabilization control strategy during grid-isolated operation or active regulation and reactive optimization control strategy or grid-connected/isolated mode switching strategy or multi-power-supply coordination control strategy and energy optimal management strategy, and coordinates and controls a renewable energy source grid-connected device and an electric power quality control device so as to complete renewable energy source grid-connected harmonic suppression and voltage disturbance resistance.

An integrated charge management system using IC card for water, electric and gas comsumptions is composed of IC card, the kilowatt-hour meter with IC card, IC card-type wate meter and gas meter, and a managing microcomputer with IC card reader, memory, comparing module and other modules. When the electric quantity bought by user has been consumed off, it is automatically cut off. The electric quantity can be bought again only after the fee for water and gas has been paid.

The invention discloses an optimal selection method for wind generation sets in a wind power farm. The method comprises the following steps of: (1) firstly, computing the annual equivalent full generation hours and the generating capacity coefficient of each alternative set of a proposed wind power farm, and computing difference kilowatt hour cost and full lifecycle difference kilowatt hour cost of each alternative set in the wind power farm according to a computational formula of the difference kilowatt hour cost and the full lifecycle difference kilowatt hour cost; (2) taking minimization of the expense of the kilowatt hour cost in the full lifecycle as the primary basis for making a decision, comparing the full lifecycle difference kilowatt hour cost of each alternative set, and selecting the alternative set with the minimal full lifecycle difference kilowatt hour cost as the determined set; (3) when the full lifecycle difference kilowatt hour costs of the alternative sets of different models are identical or approximate, selecting the set with lower difference kilowatt hour cost or the set with higher annual equivalent full generation hours and higher generating capacity coefficient. The method can effectively and quickly perform optimal selection on multiple models, thereby providing reliable basis for the developers to make decision on selection.

The invention relates to the technical field of mineral processing, in particular to a method for producing powdered rock phosphate balls by using powdered rock phosphate screened out by enterprises or mineral powder left after mine production with low-concentration phosphoric acid. The method comprises the steps of screening, batching, mixing, ball pressing, drying and cooling; in the method, the content of P2O5 in phosphate rock is increased as a phosphate acid and phosphate binder is adopted and the P2O5 in the binder ultimately enters a furnace and participates the phosphorus producing reaction, and the quality of phosphate rock is improved; carbonate impurities in the added phosphoric acid and phosphate rock are subjected to chemical replacement reaction, and mixing is carried out by a double-roll mixer, so that carbon dioxide and organic matters harmful to the electric furnace during production can be fully released; in the production of yellow phosphor, the power consumption of the electric furnace can be reduced by 190 kilowatt hour as long as 1% of CO2 content is reduced, the consumption of coke can be reduced by 29 kilograms, and the production costs of the enterprises can be greatly reduced.