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3652results about How to "Improve energy conversion efficiency" patented technology

Navigation device presenting information regarding charging and vehicle including same device

An ECU executes a program including a step of detecting a present location using a GPS system (S1000); a step of reading out data of a geographical map proximate to the present location (S1010) and presenting in the geographical map charging installations including a charging installation employing solar light, together with the location of its vehicle (S1020); a step of, if a presentation switching request is made (YES in S1030) and a real-time solar radiation correction request is made (YES in S1050), detecting a solar radiation amount (S1060) and correcting a charge amount per unit time provided by the power generation installation employing solar light, based on the detected solar radiation amount (S1070); and a step of detecting an SOC in the battery to calculate an amount of discharge done until arrival at the charging installation (S1080, S1090), calculating time required for charging up to a fully charged state (S1100), and presenting the time required for charging in the geographical map (S1200).

Solar modules with tracking and concentrating features

Disclosed are fixed solar-electric modules having arrays of solar concentrator assemblies capable of separately tracking movements through one or two degrees of rotational freedom to follow the movement of the sun daily and / or seasonally. The concentrators can include optical elements to direct and concentrate light onto photovoltaic and / or thermoelectric receivers for generation of electric current.

Combined wind power prediction method suitable for distributed wind power plant

The invention provides a combined wind power prediction method suitable for a distributed wind power plant. The method comprises the following steps: step 1, acquiring data and pre-processing; step 2, utilizing a training sample set and a prediction sample set which are normalized to build a wind speed prediction model based on a radial basis function neural network and predict the wind speed and variation trend of distribution fans at the next moment; step 3, building a distributed wind power plant area CFD (computational fluid dynamics) model and externally deducing the prediction wind speed of each fan in the plant area according to factors such as the terrain, coarseness and wake current influence of a distributed wind field; step 4, acquiring the power data of an SCADA (supervisory control and data acquisition) system fan of the distributed wind field; and step 5, adopting correlation coefficients. The invention firstly provides a double-layer combined neural network to respectively predict the wind speed and power. Models are respectively built through adopting appropriate efficient neural network types, and improved particle swarm optimization with ideas of 'improvement', 'variation' and 'elimination' is additionally added to optimize the neural network, so that the speed and precision of modeling can be effectively improved, and the decoupling between wind speed and power is realized.

Techniques for Enhancing Performance of Photovoltaic Devices

Techniques for improving energy conversion efficiency in photovoltaic devices are provided. In one aspect, an antimony (Sb)-doped film represented by the formula, Cu1-yIn1-xGaxSbzSe2-wSw, provided, wherein: 0≦x≦1, and ranges therebetween; 0≦y≦0.2, and ranges therebetween; 0.001≦z≦0.02, and ranges therebetween; and 0≦w≦2, and ranges therebetween. A photovoltaic device incorporating the Sb-doped CIGS film and a method for fabrication thereof are also provided.

Basic polymer electrolyte fuel cell

A fuel cell has a unit cell whose output is increased. A unit cell of a fuel cell includes a cathode electrode having a gas diffusion layer and an electrode catalyst layer. The electrode catalyst layer is made of carbon black carrying a Pt—Mn-based alloy such as a Pt—Mn alloy on its particle surface. For operating the fuel cell which includes the cathode electrode, it is preferable to make the pressure of an oxygen-containing gas supplied to the cathode electrode higher than the pressure of an hydrogen-containing gas supplied to an anode electrode to make the pressure at the cathode electrode higher than the pressure at the anode electrode.

Minisize nuclear battery

The invention discloses a minitype nuclear battery, which mainly solves the problem that the nuclear battery manufacturing is easier than the SiC technology realization. A low doping epitaxial layer (2) and an ohmic contact electrode (3) are respectively arranged at the upper part and the lower part of an N-type high doping SiC substrate (1), wherein, a circular schottky contact layer (4) is deposited on the upper surface of the low doping epitaxial layer (2), and a SiO2 passivating layer (5) and a bonding layer (7) are arranged on the circumference at the outer edge of the schottky contact layer. The schottky contact layer (4) and a schottky contact electrode (6) are formed by adopting an identical technology, that is, a schottky contact hole is etched by adopting wet process in the center position of the SiO2 passivating layer (5), and Ni, Pt or Au with the thickness being 5 to 20 nm deposited on the SiO2 passivating layer on the hole or at the periphery of the hole, and the schottky contact layer (4) and the schottky contact electrode (6) are respectively formed after the SiO2 passivating layer is peeled off. The minitype nuclear battery has the advantages of simple technology and high conversion efficiency, and is applicable in directly converting the nuclear energy radiated by isotopes into the electric energy.

Compressed air energy storage system

The invention discloses a compressed air energy storage system, which comprises a compressor unit, a pre-expansion device, a turbine expansion machine, an intermediate cooler, an electric motor, a power generator, a hot water storage tank and a cold water storage tank, wherein the system utilizes electric energy which is not used up in the user electricity consumption valley period or wind power station power generation peak period for driving the compressor unit to work, the air at the normal pressure is compressed to high pressure, in addition, the part of air with rich pressure energy is stored into a high-pressure-resistance hole, in addition, the stored high-pressure air is released in the user electric consumption peak period or the wind power field generation valley period, an expansion unit is pushed to apply work, and the electric energy is output. The air pre-expansion device is additionally arranged at an outlet of an air storage chamber, so the air inlet pressure of the air turbine expansion machine is stable, the work stability of a power generation system is enhanced, low-temperature air at an outlet of the pre-expansion device is utilized for cooling hot water from the hot water storage tank, the temperature of the low-temperature air is raised through absorption of heat from the hot water, and the cooled water enters the cold water storage tank. The compressed air energy storage system is provided with the hot water storage tank and the cold water storage tank, the water is cyclically utilized in a closed loop, the water is not consumed, in addition, the heat discharged by the compressor is fully utilized and conveyed back to the high-pressure air at the outlet of the pre-expansion device. The high-pressure air at the outlet of the pre-expansion device is recovered through a heat recovering device (HRH).

Series battery equalizing equipment

The invention relates to series battery equalizing equipment. Each battery of a plurality of batteries connected in series is connected with an equalizing module, and the equalizing module comprises a diffluence module and a flyback transformer unit. The diffluence module of the equalizing module spans two adjacent single batteries. In the diffluence module, a grid electrode of a switching tube MOSFET is connected with the anode of the first single battery; a source electrode of the switching tube MOSFET is connected with an energy storage inductor; a gate electrode is connected with a controller; the energy storage inductor is connected with the cathode of the first single battery; the cathode of a diode is connected with the source electrode of the MOSFET; and the anode of the diode is connected with the cathode of the second battery. The flyback transformer unit is characterized in that a grid electrode of the switching tube MOSFET for controlling a flyback transformer is connectedwith the anode of a third battery; the source electrode is connected with a primary side same polarity of the transformer; the gate electrode is controlled by the controller; a primary side synonyms polarity and a vice-side same polarity of the flyback transformer are both connected with the cathode of the third battery; a vice-side synonyms polarity of the flyback transformer is connected with the anode of a protection diode of the flyback transformer; and the cathode of the protection diode is connected with the anode of the first battery.

Low-head efficient shaft-extension tubular pump turbine and blades thereof

The invention relates to a low-head shaft-extension tubular pump turbine and blades thereof, and belongs to the technical field of energy power. The low-head shaft-extension tubular pump turbine comprises a pump turbine body, a reversible motor, a flow channel and a flow guide mechanism, the flow channel comprises a water inlet section flow channel, a guide blade section flow channel, a runner chamber and an S-shaped exhaust water pipe flow channel which are sequentially communicated, a runner is in transmission connection with the reversible motor through a spindle, the flow guide mechanism is arranged on the other side of the runner, the runner comprises a runner boss and a runner cone, the blades are circumferentially and uniformly arranged on the runner boss, the middle of each blade is thick while two sides of each blade are thin, each blade is in the shape of a three-dimensional warped surface, and spatial characteristics of each blade are indicated by an upper section, a middle section and a lower section. The operation conditions of power generation by a turbine and water pumping by a pump can be simultaneously met and are opposite in water flow direction, namely, the same runner needs to simultaneously meet the double requirements of water pumping and power generation, the efficiency of the two operation conditions can be simultaneously considered, and the low-head shaft-extension tubular pump turbine is applicable to a low-head pumped storage power station.

Resonant power converter

A resonant power converter includes a DC power source 1, a pair of MOS-PETs 1 and 2 which are connected in series to the DC power source, a transformer Tr1 which is arranged at the subsequent stage of the MOS-FETs 1 and 2 and includes a primary coil and a secondary coil, a capacitor C4 is arranged in parallel with the secondary coil of the transformer Tr1 so that series resonance occurs between the leakage inductance of the transformer Tr1 and the capacitor C4. A current doubler rectifier circuit may be arranged in the subsequent stage of the capacitor C4. Further, a pair of switching elements for synchronous rectification may be provided in the subsequent stage of the capacitor C4 so that these switching elements are driven by drive signals responsive to a voltage generated across the resonance capacitor C4.

Highly efficient counter electrode for dye-sensitized solar cell and method of producing the same

Disclosed herein is a counter electrode for a dye-sensitized solar cell, and a method of producing the same. In the dye-sensitized solar cell which includes a photoelectrode containing a photosensitive dye molecules, in which the counter electrode is positioned opposite to the photoelectrode, and an electrolytic solution interposed between the photoelectrode and the counter electrode, the counter electrode has an electron transfer layer. The electron transfer layer has a structure in which one or more conductive materials, selected from the group consisting of a conductive polymer, platinum nanoparticles, a carbon compound, inorganic oxide particles, and a conductive polymer blend, are sequentially laminated. In the counter electrode, the electron transfer layer promotes smooth electron transfer through an interface between the electrolyte, containing pairs of redox ions, and counter electrode. Thereby, energy conversion efficiency is significantly improved in comparison with a conventional dye-sensitized solar cell employing a counter electrode in which only a platinum layer is applied on a transparent conductive material.

Cascade megawatt photovoltaic grid-connected inverter

The invention provides a cascade megawatt photovoltaic grid-connected inverter, wherein a topology structure of the cascade megawatt photovoltaic grid-connected inverter is composed of two levels, namely a DC/DC (direct current/direct current) isolation level and a DC/AC (direct current/alternating current) output level; the structures of three phases of circuits are the same; the output ends of a power inverter group of each single-phase of DC/DC output level are connected in a star shape; the input sides of power units of each single-phase level are provided with independent PV (photovoltaic) modules of the same structure; the DC/DC isolation level comprises high-frequency DC/AC, a high-frequency transformer and high-frequency AC/DC nodes of each single-phase for realizing isolation and boosting, and reducing the consumption of a switch tube via action of a resonant soft switch; the output level power transformer set adopts a bridge type inverter circuit; and the single-phase output level power units are connected with each other in a cascade mode. Based output cascade, the device can realize megawatt grid connection; as a high-frequency chain technology is used, the traditional low frequency transformer is omitted, and the power density is high; and compared with the existing photovoltaic grid-connected inverter structure, the device provided by the invention has the advantages of high energy conversion efficiency, excellent output energy quality, certain fault-tolerant capability and the like.
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