61results about How to "Efficient energy storage" patented technology

The invention discloses a method for saving energy through injection air suction in a thermodynamic process, which belongs to the field of heat energy power. In order to improve thermal efficiency, a high-parameter power air source is utilized; a composite injection system is formed by an injection air suction thermodynamic system in a circulating air suction mode or by a multistage injection air suction device on the level of more than one in a serial connection, parallel connection and circulation combined mode; and by combining an injection air suction system with a gas turbine engine and other heat and power conversion equipment, a high-parameter air source enters the injection air suction system and then enters the gas turbine engine to do work so as to operate at high efficiency. In addition, an injection refrigeration scheme capable of reducing throttling losses is provided; and the energy saving method can be popularized to wide energy-saving fields of various heat energy and power processes, seawater and other water thermodynamic purification systems and the like, and is high in efficiency and low in cost.

Disclosed is an energy storage device based on metal oxide nanocrystals resealed through lithiation, and a supercapacitor using the same. The energy storage device is fabricated by dispersing transition metal nanoparticles over a carbon-based support with a large specific surface area, and then, dispersing and resealing the nanoparticles over the support using lithium ions with strong reductive ability, so that the resealed metal particles are substantially particles dispersed and resealed over the support as particles having a size of less than 1 nanometer on the scale of atomic units. The supercapacitor is fabricated using the energy storage device. The energy storage device higher capacitance than before resealing of metal oxide. Since the resealed metal particles are those having a size of less than 1 nanometer on the scale of atomic units, interference between particles disappears to exhibit excellent cycle life characteristics of 100% maintained performance in even more than 100,000 cycles.

Cryogenic energy storage systems, and particularly methods for capturing cold energy and re-using that captured cold energy, are disclosed. The systems allow cold thermal energy from the power recovery process of a cryogenic energy storage system to be captured effectively, to be stored, and to be effectively utilised. The captured cold energy could be reused in any co-located process, for example to enhance the efficiency of production of the cryogen, to enhance the efficiency of production of liquid natural gas, and/or to provide refrigeration. The systems are such that the cold energy can be stored at very low pressures, cold energy can be recovered from various components of the system, and/or cold energy can be stored in more than one thermal store.

The present invention describes a method and an apparatus for storing electric energy needed in an elevator system into a supercapacitor. Furthermore, the invention can be used as a source of reserve power in emergency situations, such as power failures. The supercapacitor is connected together with three switching branches to a rectified signal of the power supply of the motor. By closing and opening the switches, the supercapacitor can be charged when the motor load is small. When the motor load is large or when the power supply fails, the electric energy contained in the supercapacitor can be discharged for use by the motor. In an emergency, the motor drives the elevator at a speed lower than normal, and therefore a supply voltage lower than normal is sufficient. Also, energy obtained from braking of the elevator can be stored in the supercapacitor, which has a storage capacity of considerable magnitude as compared to an ordinary capacitor. By applying the invention, the energy consumption of the elevator can be reduced because the waste energy obtained from the power supply can be stored and utilized when more energy is needed.

The present invention relates to a hydraulic drive system for driving an apparatus, with a drive unit, a first and a second hydraulic displacement machine, with which the drive unit is connectable or connected for transmitting mechanical energy, and a third and a fourth hydraulic displacement machine, which are connectable or connected with the apparatus for transmitting mechanical energy, wherein the first hydraulic displacement machine is hydraulically connected or connectable with the third hydraulic displacement machine, and wherein a high-pressure accumulator is provided, which is hydraulically connected or connectable with the second and the fourth hydraulic displacement machine.

The operating and driving mechanism applied to the driving mechanism in the breaker and switch disconnector etc. equipment includes following structure. The armature is fixed on the driving rod. The coil for detaching breaker (some time it can be left out), the permanent magnet, the pole shoes, the closing coil and the static iron core are set up around the circumference of the armature. The upper and the lower ends of the driving rod pass through the upper and the lower axial sleeves, which are inserted into the top end cover and the bottom end cover. There is the asistance mat slice on the bottom end cover. The top end cover is in the basin-typed structure. The static iron core, the top and the bottom end covers as well as the pole shoes can be made as the integrated piece.

The invention relates to a high-rotation speed energy storage and power assisting device of a crane lifting mechanism, wherein the high-rotation speed energy storage and power assisting device comprises an energy storage device, a clutch, a power assisting device and a control device, wherein an energy storage device installation shaft with a higher rotation speed is added through a speed increasing gear at a power input shaft of a speed reducer or a gear box of the crane lifting mechanism; the clutch is capable of achieving linkage or separation of the power input shaft of the speed reducer or the gear box and the energy storage device installation shaft; the power assisting device is capable of transferring energy collected by the energy storage device to the power input shaft of the speed reducer or the gear box; when a sling load ascends, the clutch is opened and the energy storage device does not collect the energy and does not increase new rotational inertia of the lifting mechanism; when the sling load descends, the clutch is closed and the energy storage device collects potential energy released by the sling load while descending; the lifting mechanism drives the sling load ascend again, and the power assisting device transfers the energy stored by the energy storage device to the power input shaft. The high-rotation speed energy storage and power assisting device is beneficial to efficient energy storage and is capable of assisting the sling load in lifting.

A hybrid energy harvesting system for powering underwater vehicles having at least one thermal engine, at least one of a solar or a wave energy harvester, and a battery which stores electric energy produced by the harvesters. The energy harvesters keep the battery charged and thereby expand an underwater vehicle's operational areas to high latitudes and shallow water. Multiple thermal engines employing different phase-change materials can be used to expand the vehicle's working temperature range and thus allow it to operate over a larger area. An electric motor powered by the battery and a pump driven by the motor can be used to pump hydraulic fluid between the accumulators and external bladders of the thermal engines to cause the vehicle to descend and ascend when the thermal gradient to which the vehicle is subjected is insufficient.

Disclosed is a negative electrode material for a lithium secondary battery, using a layer structure of porous graphene and metal oxide nanoparticles, with remarkably fast charge/discharge characteristics and long cycle life characteristics, wherein macropores of the porous graphene and a short diffusion distance of the metal oxide nanoparticles enable rapid migration and diffusion of lithium ions. The present invention may achieve remarkably fast charge/discharge behaviors and exceedingly excellent cycle life characteristics of 10,000 cycles or more even under a current density of 30,000 mA·g⁻¹. Accordingly, the structure of the present invention may implement very rapid charge/discharge characteristics and stable cycle life characteristics while having high capacity by combining the structure with negative electrode nanostructures of the porous graphene network structure, and thereby being widely used in a variety of applications.

A solar heat collector with a film hole structure comprises a heat preservation box with the upper end open, a phase-change material layer is arranged in the heat preservation box, a coiled pipe is arranged in the phase-change material layer, a conical metal foam layer is arranged at the top of the phase-change material layer, the outer wall of the conical metal foam layer is wrapped by a transparent outer layer which can transmit light, and metal foam is added into the phase-change material layer. The content of air in a heat collecting area is greatly increased due to the metal foam structure, an air layer is divided into parts with small volumes, and therefore heat loss caused by convection is prevented. Sunlight can illuminate the conical metal foam layer through the transparent outer layer, the conical metal foam layer has the function of a heat absorber and converts light energy into heat energy, and the transparent outer layer has the function of a heat insulating layer and prevents heat in the heat absorber from being dissipated to the outside. The solar heat collector can effectively absorb solar radiation and fast store the energy and can be widely used for drying, food processing, household heat supplying , cooking and the like.

An excavator includes an electric load, an electrical energy storage unit including an electrical energy storage part (19) that supplies electric power to the electric load, and a control unit (30) that controls an amount of charge to the electrical energy storage part (19) so that a charge rate of the electrical energy storage part (19) is between a system control upper limit value and a system control lower limit value. The control unit (30) controls the amount of charge to the electrical energy storage part (19) based on a changing trend of a detection value of the charge rate.

The invention discloses polymer gel electrolyte modified by functionalized graphene oxide, and a preparation method and application of the same. The functionalized graphene oxide is formed by the connection of a redox active substance with graphene oxide through the intermolecular forces between hydrogen bonds, the chemical bond acting force among ether bonds, ester bonds or amido bonds and the pi-pi stacking intermolecular forces. A multi-stage interlayer structure is a gap structure which is formed among a polyhydroxy high-molecular polymer layer, a redox active substance layer and a graphene oxide layer, and provides a short conveying channel for electrolyte ions. The electrolyte is used for a supercapacitor, has the high ionic conductivity and redox activity, and improves the specific capacitance.

The invention discloses a graphene composite material, and a preparation method and an application thereof as a positive electrode material. The graphene composite material is formed by compositing graphene with 1,6,7,12,13,18-hexaazatrinaphthylene, wherein the mass of graphene accounts for 10%-30% of the total mass of the graphene composite material. The preparation method of the graphene composite material comprises a graphene and 1,6,7,12,13,18-hexaazatrinaphthylene obtaining step and a ball milling and mixing step. The graphene composite material has higher capacity; and because 1,6,7,12,13,18-hexaazatrinaphthylene has a large molecular system, the graphene composite material is not easy to dissolve in an electrolyte solution in a process of charge and discharge, so as to increase the positive electrode life. The preparation method has the advantages of simple process and easily controlled production conditions, effectively reduces the production cost, improves the production efficiency, and is suitable for industrialized production.

An all-inorganic electrolyte formulation for use in a lithium ion battery system comprising at least one of each a phosphoranimine, a phosphazene, a monomeric organophosphate and a supporting lithium salt. The electrolyte preferably has a melting point below 0° C., and a vapor pressure of combustible components at 60.6° C. sufficiently low to not produce a combustible mixture in air, e.g., less than 40 mmHg at 30° C. The phosphoranimine, phosphazene, and monomeric phosphorus compound preferably do not have any direct halogen-phosphorus bonds. A solid electrolyte interface layer formed by the electrolyte with an electrode is preferably thermally stable ≧80° C.

The invention discloses a manufacturing method of a solvent-free thermochromic luminescent synthetic leather. The method includes the steps that firstly, a long-afterglow luminescent material is subjected to surface group activation modification; then, the modified long-afterglow luminescent material and a thermochromic capsule are introduced into a polyurethane surface layer at the same time through a bi-component in-situ coating technology, and the solvent-free thermochromic luminescent synthetic leather is obtained. The problems are solved that an existing blended compound luminescent material has poor compatibility with polyurethane, migration separation-out occurs easily and distribution is not uniform. The synthetic leather can absorb and store sunlight in the daytime and continuously emit light at night, the color can change reversibly with temperature in the daytime, the color of light can also change with temperature at night, the color of polyurethane can be controlled by changing temperature, the synthetic leather can have new styles and designs, the functionality of the synthetic leather is improved, and the application range of the synthetic leather is broadened. No organic solvent is used in the preparation process, which meets the development tendency of the synthetic leather industry and the green consumption and environmental health requirements of consumers.

The invention discloses a preparation method and application of a hollow covalent triazinyl framework material loaded with MoS2 quantum dots. The preparation method comprises the following steps: (1)preparing silicon dioxide nano spheres; (2) preparing a MoS2 quantum dot solution; and (3) preparing the hollow covalent triazinyl skeleton material by taking the silicon dioxide nano spheres preparedin the step (1) as a template, dispersing the prepared hollow covalent triazinyl skeleton material powder into the MoS2 quantum dot solution prepared in the step (2), performing an ultrasonic treatment for 0.5-1.5 hours, adding acetone, stirring for 12-36 hours, collecting a product through centrifugation, washing with water, and drying to obtain the hollow covalent triazinyl skeleton material loaded with MoS2 quantum dots. The hollow covalent triazinyl skeleton material is used as a catalyst in hydrogen production by water decomposition under visible light, the catalytic activity of the hollow covalent triazinyl skeleton material is greatly improved, and water molecules can be efficiently and stably decomposed under visible light to produce hydrogen.

The invention discloses a Li2C6O6 composite material and its preparation method and use as an anode material. The Li2C6O6 composite material comprises graphene and Li2C6O6, wherein the Li2C6O6 composite material comprises 30-60wt% of graphene. The preparation method comprises the following steps of preparing a graphene suspension liquid and mixing the graphene suspension liquid and a Li2C6O6 solution. Through compounding of graphene and Li2C6O6, the Li2C6O6 composite material has excellent electrical conductivity and heat stability. When the Li2C6O6 composite material is used as an accumulator anode material, the accumulator anode can carry out charging and discharging at a large current and a capacity is stabe in a charging-discharging cycle. The preparation method has simple processes and easily controlled production conditions, effectively reduces a production cost, improves production efficiency and is suitable for industrial production.

The invention discloses perforated graphene aerogel moisture absorption fiber. The perforated graphene aerogel moisture absorption fiber comprises perforated graphene aerogel fiber and a moisture absorbent, wherein the perforated graphene aerogel fiber is a fiber material which is formed by overlapping perforated graphene sheets and has a three-dimensional porous network structure; and the moisture absorbent wraps the perforated graphene sheets and is embedded in and fills the three-dimensional porous network structure. The invention further discloses a preparation method and application of the perforated graphene aerogel moisture absorption fiber. The perforated graphene aerogel moisture absorption fiber has excellent flexibility, knittability, moisture absorption performance, electric heating performance, photo-thermal energy storage performance and the like, so that the perforated graphene aerogel moisture absorption fiber can be used for preparing moisture absorption and heat preservation devices, air water taking devices, intelligent response devices, moisture absorption and heat storage devices, moisture absorption and refrigeration devices, microwave absorption devices or flexible wearable devices.

The invention discloses an optical collector which comprises at least one first optical collection unit, at least one second optical collection unit, at least one energy storage unit and at least one conduction unit. At least one energy conversion assembly used for converting energy into electric energy is arranged on the first optical collection unit. At least one optical collection component is arranged on the second optical collection unit. The energy storage unit is connected with the first optical collection unit and used for storing the electric energy generated through the energy conservation assembly. The conduction unit is connected with the first optical collection unit and/or the second optical collection unit and comprises at least one optical guiding assembly and at least one electric conduction assembly. The optical collector is simple in structure, multifunctional and capable of collecting light and storing energy as well, and achieves utilization of sunlight to the greatest extent.

The invention relates to a multilayer cylindrical spiral pipe solar storage tank. A tank body of the multilayer cylindrical spiral pipe solar storage tank is cylindrical, three cylindrical spiral heat transfer pipeline layers are arranged on the tank body from inside to outside, namely, an outer cylindrical spiral heat transfer pipeline layer, a middle cylindrical spiral heat transfer pipeline layer and an inner cylindrical spiral heat transfer pipeline layer, and each cylindrical spiral heat transfer pipeline layer penetrates in the tank body from top to bottom. A fluid inlet pipe is divided into three inlet branch pipes, each branch pipe is provided with an adjusting valve, and the three inlet branch pipes are connected with inlets of the cylindrical spiral heat transfer pipeline layers respectively and are in one-to-one correspondence with the inlets. Outlets of the three cylindrical spiral heat transfer pipeline layers are gathered to an outlet manifold at the bottom of the tank body, and the outlet manifold extends out of the tank body. A heat preservation layer is arranged on the outer wall of the tank body. By means of the multilayer spiral pipe distribution structure, the heat transfer efficiency of a system is improved, the heat transfer time of the system is shortened, and energy saving of the system is achieved.