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150results about How to "Improve energy conversion efficiency" patented technology

Solar photovoltaic devices having optional batteries

Solar photovoltaic (PV) devices, e.g., those based on the Copper Indium Selenide (CIS) family of absorbers, including CuIn(1-x)Ga(x)Se2 (CIGS) absorber thin-film PV devices, are provided. Embodiments provide PV devices comprising an alkali metal-containing polymeric film (ACPF), which is a film formed from a composite comprising an alkali metal-containing material and a polymer. Embodiments of this disclosure also provide PV devices comprising a thermally stable polymer film that does not contain an alkali metal (TSP). Included within the embodiments of this disclosure are flexible PV devices comprising a flexible base substrate onto which one or more ACPFs and/or TSPs is/are provided, as well as flexible PV devices wherein an ACPF or TSP itself constitutes the base substrate in the form of a stand alone film. Processes for making such flexible PV devices include roll-to-roll processes. PV devices disclosed herein will provide improved energy conversion efficiencies as a result of the delivery of sodium dopant into the absorber layer. Also disclosed are combinations of such PV devices and batteries that may store energy generated from the PV absorber. This disclosure also relates to shunt circuits for connecting the PV absorber to a battery in a combination PV/battery device and to array connectors for connecting such PV devices, either with or without batteries.
Owner:LOMASNEY HENRY L

Ambient vibration energy collecting device based on two-DOF (Degree of Freedom) piezoelectric vibrator

The invention discloses a ambient vibration energy collecting device based on a two-DOF (Degree of Freedom) piezoelectric vibrator which comprises two parts, namely energy conversion and power regulation, wherein an vibration unit containing piezoelectric material in a vibration energy conversion device can respond ambient vibration transmitted by a base and convert mechanical energy into electric energy; a power regulation circuit accumulatively store electric energy after extraction and regulation. The vibration unit is provided with two piezoelectric vibrators with SDOF (Single Degree of Freedom) cantilever beam structure, which are fixed on the base in parallel horizontally, and a spring vertically connected with a vibrator mass block; the beam thickness of the two vibrators and the weight of the mass block are different, thus a broadband resonance two-DOF system of which adjacent first-order resonance frequency and second-order resonance frequency are adjacent is formed. The power regulation circuit is provided with a low-power-consumption synchronous charge transfer circuit module, a charge collection capacitor, a controllable voltage threshold DC / DC (direct current) conversion module and a power storage component. The device has a broader resonance response frequency band and low power consumption, can work without an external power supply so as to achieve high efficiency, and is suitable for self-powered devices or devices getting electrical energy supply from environment.
Owner:CENT SOUTH UNIV

Two-stroke opposed-piston diesel engine

The invention relates to a two-stroke opposed-piston diesel engine. The existing piston-type engine structure is that a piston is arranged inside an engine cylinder, the piston is connected with a crankshaft through a connecting rod to form a crankshaft linkage mechanism, and the energy conversion efficiency is only 25 to 35 percent. The invention aims at designing a two-stroke opposed-piston diesel engine. The two-stroke opposed-piston diesel engine structurally consists of piston mechanisms (3), a power output mechanism (34), a left crankshaft linkage mechanism (36), and a right crankshaft linkage mechanism (32), wherein the piston mechanisms (3) with the same structure and capable of synchronously moving in opposite directions are oppositely arranged at two sides inside an air cylinder barrel (6) of an air cylinder body (2), a burning chamber (31), a fuel oil nozzle mechanism (10) and a vent valve mechanism (22) are arranged on the middle position of the cylinder barrel (6). The two-stroke opposed-piston diesel engine has the advantages that by adopting a unique structure, two pistons are ingeniously and symmetrically arranged inside the cylinder barrel, so that multiple problems existing in the traditional piston-type engine can be high efficiently and reliably solved. The energy conversion efficiency can be improved.
Owner:李玉龙

Solution cooling absorption type ammonia water motive power circulation device

The invention discloses a solution cooling absorption type ammonia water motive power circulation device, which consists of an evaporator 1, a turbine machine set 3, a regenerator 4, a low-pressure absorbing device 5, a low-pressure ammonia pump 6, a gas-liquid separator 7, a pre-heater 8, a high-pressure absorbing device 9, a high-pressure ammonia pump 10, a throttle valve 11 and a connecting pipeline, wherein the low-pressure absorbing device and the high-pressure absorbing device are respectively divided into a solution cooling absorbing section and a cooling water absorbing section, and the solution cooling absorbing section is arranged above the cooling water absorbing section. The solution cooling absorption type ammonia water motive power circulation device has the advantages that the absorbing device outlet solution is used for cooling the front section of the absorbing process, the cooling water quantity can be reduced, the heat discharge and the heat transfer loss on the environment can be reduced, the heat transfer area is favorably reduced, and the circulation heat efficiency is favorably improved. The solution cooling absorption type ammonia water motive power circulation device is provided with the three-flow pre-heater for preheating work solution before entering the evaporator, the dilute solution and rich ammonia gas entering the absorber can be cooled, the absorption driving force can be enhanced, and in addition, the smoke gas low-temperature corrosion resistance of the device is favorably improved.
Owner:SOUTHEAST UNIV

Energy-saving elevator power distribution system

The invention discloses an energy-saving elevator power distribution system. A signal sampling unit in a flywheel energy storage device of the power distribution system is used for acquiring state parameters of an electrolytic capacitor, a bidirectional energy converter, a flywheel, a flywheel motor, the power grid and an inverter in an elevator system, and the output end of the signal sampling unit is connected with the input end of an analog to digital (A/D) converter; the output end of the A/D converter is connected with the input end of a calculation control unit; the communication port of the calculation control unit is connected with a communication unit, and the control signal output end of the calculation control unit is connected with the input end of an isolation driving unit; the output end of the isolation driving unit is connected with the control end of the bidirectional energy converter; the positive end of the electrolytic capacitor is respectively connected with the positive end of the output port of a three-phase rectifier and the positive end of the direct current (DC) port of the bidirectional energy converter, and the negative end of the electrolytic capacitor is respectively connected with the negative end of the output port of the three-phase rectifier and the negative end of the DC port of the bidirectional energy converter; and a rotor of the flywheel motor is coaxially connected with the flywheel, and a three-phase stator winding of the flywheel motor is electrically connected with the alternative current (AC) end of the bidirectional energy converter.
Owner:ZHEJIANG UNIV

Non-relativistic electron beam induced dielectric waveguide-based terahertz radiation source

ActiveCN105655851AImprove energy conversion efficiencyIncreased Radiation PowerMasersRadiation frequencyResonance
The invention discloses a non-relativistic electron beam induced dielectric waveguide-based terahertz radiation source. The non-relativistic electron beam induced dielectric waveguide-based terahertz radiation source includes a pulse laser light source used for emitting a laser pulse string, a frequency adjusting device used for adjusting the repetition frequency of the laser pulse string, an electron gun and a dielectric waveguide; the cathode of the electron gun is used for absorbing the laser pulse string and transmitting an electron beam cluster string; a size-adjustable electric field formed between the cathode and anode of the electron gun is used for accelerating the emitting of the electron beam cluster string into the dielectric waveguide; the dielectric waveguide is excited by the electron beam cluster string to form terahertz radiation; and the repetition frequency of the laser pulse string and the radiation frequency of the dielectric waveguide form resonance. With the non-relativistic electron beam induced dielectric waveguide-based terahertz radiation source adopted, energy conversion efficiency between the electrons and radiations of the terahertz radiation source can be effectively improved, radiation power can be improved, radiation frequency is adjustable. The cost of the terahertz radiation source can be reduced.
Owner:UNIV OF SCI & TECH OF CHINA

Ultrasonic pulse resonance jet rotary spray-head device

The invention relates to an ultrasonic pulse resonance jet rotary spray-head device which comprises an ultrasonic transducer and a spray head, wherein a longitudinal pulse jet inlet is drilled in an ultrasonic transducer body, the ultrasonic transducer body is rotatably installed on the central shaft of the transducer, a high-pressure rotary sealing device is arranged between the central shaft of the transducer and the ultrasonic transducer body, an axial high-pressure water channel communicated with the longitudinal pulse jet inlet is drilled in the central shaft of the transducer, and an ultrasonic transduction vibrator is arranged outside the central shaft of the transducer; and an oscillation cavity is arranged in the shell of the spray head, a plurality of nozzles are arranged at the lower end of the shell of the spray head, a multi-head amplitude-changing rod is arranged in the oscillation cavity, and a plurality of miniature amplitude-changing heads are fixedly connected onto the multi-head amplitude-changing rod. The design of the rotary ultrasonic transducer and the spray head is adopted by the invention, the oscillation cavity is arranged in the shell of the spray head, and the multi-head amplitude-changing rod is arranged in the oscillation cavity, thereby improving the energy conversion efficiency, increasing the cleaning width and area of the ultrasonic pulse resonance jet rotary spray-head device and greatly improving the cleaning efficiency of the ultrasonic pulse resonance jet rotary spray-head device.
Owner:西安远诚机电科技有限公司

Disc type solar coupling SOEC (solid oxide electrolysis cell) electrolysis hydrogen production equipment and hydrogen production method

The invention discloses disc type solar coupling SOEC (solid oxide electrolysis cell) electrolysis hydrogen production equipment and a hydrogen production method. The disc type solar coupling SOEC electrolysis hydrogen production equipment comprises a light intensity sensor, wherein the light intensity sensor is arranged on a collector, a condenser is arranged at the bottom of the collector, a disc type condensed light reflector is arranged at the lower part of the condenser, the disc type condensed light reflector is arranged on a sun-chasing power bearing box, and the sun-chasing power bearing box is arranged on a substrate; the light intensity sensor is connected with a controller inside the sun-chasing power bearing box; the collector is connected with a liquid metal heat exchanger through a union heat pipe, the liquid metal heat exchanger is connected with a heat exchanger, the bottom of the heat exchanger is connected with a water tank, the upper part of the heat exchanger is connected with an SOEC, and the SOEC is connected with an oxygen storage tank and a hydrogen storage tank. Solar energy is utilized, the current situation that the hydrogen production efficiency of solar energy is low at present is comprehensively considered, the technical thought of the SOEC is utilized, and optimization design is carried out for the problem of heat efficiency existing in high-temperature steam of high-temperature solid oxide electrode electrolysis at present, so that the equipment and the method disclosed by the invention are formed.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Piezoelectric static composite-type low-frequency vibration energy collector

The invention discloses a piezoelectric static composite-type low-frequency vibration energy collector which comprises a mass block, a PVDF film, a flexible variable capacitor and a silicon substrate. The flexible variable capacitor comprises a PDMS flexible cavity, a PDMS carbon nano tube upper electrode and a PDMS carbon nano tube lower electrode, the PDMS carbon nano tube upper electrode and the PDMS carbon nano tube lower electrode are located on the upper surface and the lower surface of the cavity respectively. The PVDF film is arranged on the PDMS carbon nano tube upper electrode of the flexible variable capacitor, and the PDMS carbon nano tube lower electrode of the flexible variable capacitor is fixed to the silicon substrate. The mass block is used for reducing work frequency of a device. According to the energy collector, an MEMS transducer can obtain large output power and high energy conversion efficiency in a low-frequency vibration environment; the energy collector is simple in structure, easy to manufacture, small in size and capable of operating in the low-frequency environment and has high energy conversion efficiency in an environment vibration range.
Owner:SHANGHAI JIAO TONG UNIV

Heating and temperature detecting method in tea processing

The invention provides a heating and temperature detecting method in tea processing, which applies electromagnetic heating and far infrared temperature detecting, wherein the electromagnetic heating comprises thermal insulation material, a heating coil, a magnetic conductive object and the like, and the far infrared temperature detecting comprises a far infrared temperature sensor and a temperature display device or a control device. The invention provides an electromagnetic roller steaming machine which consists of a steel cylinder, the heating coil, the thermal insulation material, a decorating plate, a guide pulley, the temperature sensor, transmission device, a stander, an electronic control cabinet and a guide vane strip; and the steel cylinder is heated in a way of electromagnetic heating, and the temperature of the steel cylinder is monitored in real time by the far infrared temperature sensor. The method has high energy conversion efficiency, little unavailable energy loss and no smoke and harmful gas emission, greatly reduces the air temperature of a workshop, and improves the work environment of the workshop; and furthermore, the method is sensitive and rapid in temperature response, can effectively reduce the fluctuation range of the temperature of the steel cylinder, is beneficial to accurately adjusting and controlling the electronic control cabinet, effectively improves the quality of enzyme-denatured leaves, and is even in deactivation of enzyme. Therefore, tea has obvious aroma and emerald green color.
Owner:宁波市姚江源机械有限公司

Redundant MPPT circuit structure-based micro-nano satellite power supply system

The invention relates to a redundant MPPT circuit structure-based micro-nano satellite power supply system, which comprises a control assembly, an electric storage assembly, switch assemblies and power generating assemblies, wherein every two power generating assemblies are connected with each other in series to form a power generating assembly group; a positive terminal of each power generating assembly group is connected with one switch assembly; a negative terminal of each power generating assembly group is connected with the negative terminal of the electric storage assembly; a control terminal of each switch assembly is connected with the control assembly; two ends of each switch assembly are also connected with two ends of the electric storage assembly and/or the other switch assemblies respectively; the positive terminal of each power generating assembly group is also connected with a first voltage input end of the control assembly; an output end of the electric storage assembly is connected with a second voltage input end of the control assembly; and the control assembly is used for controlling opening or closing of the switch assemblies. According to the system provided by the invention, connection and disconnection of a PMOS tube and an NMOS tube are achieved by a simple logic algorithm through an MPPT function, so that the system is simple and reliable to run.
Owner:SHANGHAI AEROSPACE SYST ENG INST

Brushless Motor and System Thereof

InactiveUS20170047834A1Risk be eliminate and substantially reduceImprove energy conversion efficiencyAssociation with control/drive circuitsSalient polesControl systemBrushless motors
A brushless motor controller system includes a brushless motor (201) which further contains a rotor (24) and a stator (22), a plurality of independent motor controllers (203), a plurality of batteries (204), and a plurality of battery chargers (205). The stator (22) of the brushless motor (201) has a plurality of salient poles (32). A plurality of coils are wound on the salient poles (32) such that on each of the salient poles (32) there is wound different groups of windings electrically isolated from each other. The plurality of independent motor controllers (203) each corresponds and is electrically connected to one of the groups of windings on one of the salient poles (32) of the brushless motor (201). The plurality of batteries (204) each is connected to a corresponding one of the independent motor controllers (203) to provide electrical power thereto. The plurality of battery chargers (205) each is connected to el a corresponding one of the batteries (204). The plurality of independent motor controllers (203) each is adapted to power and control a corresponding one of the groups of coils on one of the salient poles (32) in the brushless motor (201) independently. The brushless motor controller system utilizes distributed motor controllers (203), batteries (204) and chargers (205) for brushless DC motor (201) which provides not only flexibility in motor output control but also redundancies of the controlling system making it more robust.
Owner:FOSTER ASSETS CORPORATION
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