113results about How to "Avoid reduction in power generation efficiency" patented technology

The invention discloses a solar energy comprehensive utilization apparatus that comprises a photovoltaic generating assembly, a temperature difference generating assembly, and a cooling device. The photovoltaic generating assembly receives solar radiation and converts solar energy into electric energy. The temperature difference generating assembly, which is arranged at a backlight side of the photovoltaic generating assembly, is used for converting heat energy that is from the photovoltaic generating assembly into electric energy; besides, the temperature difference assembly includes a hot end and a cold end that is at an opposite side of the hot end, wherein the hot end is contacted with the backlight side of the photovoltaic generating assembly. The cooling device, which contains fluid medium, is arranged at one side of the temperature difference generating assembly and is contacted with the cold end of the temperature difference generating assembly; moreover, the cooling device enables the cold end of the temperature difference generating assembly to be cooled by circulating the fluid medium as well as thermal fluid medium is generated for utilization. According to the invention, a modularized solar energy generating and heat recovery and utilization apparatus is established, thereby realizing high efficient solar energy generating efficiency and electric heating comprehensive utilization efficiency.

An electric vehicle 10 includes a power supply apparatus 15. The power supply apparatus 15 includes a fuel cell system 22, capacitor 24 and secondary battery 26 that are connected in parallel to wiring 50. When a drive motor is performing regeneration, the capacitor 24 is collecting the regenerated electric power. The fuel cell system 22 generates electric power in accordance with the load demand. The switches 20 between the fuel cell and the wiring are closed when the load becomes small and the regenerated voltage attains a predetermined level. As a result, the generation of electric power by the fuel cell system is suspended under low-load conditions where the energy efficiency of the fuel cell system 22 is low.

A solar cell according to one embodiment of the present invention includes a solar cell element that photoelectrically converts sunlight Ls, and a columnar optical member having an incidence surface on which sunlight Ls concentrated by a concentrating lens is incident and an irradiation surface that irradiates sunlight Ls to the solar cell element, a side surface of the columnar optical member being inclined relative to a perpendicular direction such that sunlight Ls incident from the incidence surface is reflected in a direction of the irradiation surface. In the solar cell, a minimum concentrated light beam region FLRs where a concentrated light beam region FLR formed by the concentrated sunlight Ls is minimized is configured to be located inside the columnar optical member.

The invention discloses a method for detecting a shading part of a photovoltaic cell panel, belonging to the field of photovoltaic power generation. The detection method comprises the following steps of: 1, acquiring an actual image A of a photovoltaic cell array in a photovoltaic cell panel monitoring area; 2, performing gray processing on the actual image A, and comparing the actual image A subjected to gray processing with an original image B, wherein the original image B is a grayscale image in which a shading part does not exist, if the actual image A is the same as the original image B, then the shading part does not exist in the actual image, and then ending the operation, but if the actual image A is different from the original image B, then the shading part exists in the actual image A, and then taking the shading part in the actual image A as a shading area to segment the image. By the method, the shading part of the photovoltaic cell panel is accurately acquired, and the power generation efficiency is improved; and moreover, the using cost is reduced.

The present invention provides high humidity gas turbine equipment including a compressor compressing air, a combustor combusting the compressed air and a fuel, a gas turbine driven by the combustion gas, a generator driven by the gas turbine to generate power, a humidifier humidifying the compressed air by directly contacting it with hot water, and a regenerative heat exchanger heating the humidified compressed air by exhaust gas of the gas turbine and feeding it to the combustor, heat exchangers generating hot water for the humidifier utilizing a factory exhaust heat medium from the outside, a boiler generating steam to be supplied to the outside utilizing the exhaust gas of the gas turbine, and a boiler generating steam to be supplied to the outside utilizing the compressed air discharged from the compressor.

The invention discloses a distributed power generation system and island detection device thereof. The distributed power generation system comprises a grid-connected current converter, an input source providing the electric energy for the grid-connected current converter, a grid-connected switch that is connected between the output side of the grid-connected current converter and the grid, a point of common coupling that is located between the grid-connected current converter and the grid-connected switch, a load connected to the point of common coupling, a capacitor module consisting of a plurality of capacitors, a switching module and an island detection device; wherein one end of the switching module is connected with the capacitor module, the other end of the switching module is connected with the point of common coupling; when the switching module is closed, the capacitor module is connected with the point of common coupling; when the switching module is opened, the capacitor module is disconnected with the point of common coupling; the island detection device is used to acquire the resistance value at the point of common coupling and compare the acquired value with the resistance threshold value. If the acquired resistance value is larger than the resistance threshold value and the duration thereof exceeds the preset time length, then it is determined that the island effect occurs.

According to the present invention, an electrolyte membrane having recesses and projections on the surface thereof is obtained. In addition, a membrane-electrode assembly comprising the electrolyte membrane, in which the effective contact area between the electrolyte membrane surface and an electrode catalyst layer is increased, is obtained. An electrolyte membrane 1 which comprises a fluorine-based electrolyte is heated and pressed with the use of plates 10a and 10b each having recesses and projections 11 on the surface thereof such that recesses and projections 2a and 2b are formed on the surface of the electrolyte membrane 1. Thereafter, the electrolyte membrane 1 is subjected to a treatment for imparting ion exchange properties to an electrolyte polymer, such as hydrolysis, such that an electrolyte membrane 3 having recesses and projections on the surface thereof is obtained. Electrode catalyst layers 21a and 21b are separately laminated on the both surfaces of the electrolyte membrane 3 such that a membrane-electrode assembly 20 is obtained.

A membrane electrode assembly includes an electrolyte membrane, an anode disposed on one face of the electrolyte membrane, and a cathode disposed on the other face of the electrolyte membrane. The electrolyte membrane has a non-electrode-forming region where the cathode is not disposed on the surface of the non-electrode-forming region and an electrode-forming region where the cathode is disposed on the surface of the electrode-forming region. The non-electrode-forming region has a thin membrane region where the membrane is thinner than that in the electrode-forming region. The drop in power generation efficiency by water generated at the cathodes is prevented.

A charge control ECU (40) stops a charge converter (20) periodically or at a predetermined timing, and detects the open-circuit voltage of a solar cell (30) through a voltage sensor (50). The charge control ECU (40) uses a preset relational expression or map to determine the operating voltage corresponding to a maximum output power from the solar cell (30) based on the detected open-circuit voltage. The charge control ECU (40) causes the charge converter (20) to resume its operation when the determined operating voltage is set at the charge converter (20) as the target voltage (VR).

There is provided a fuel cell including a fuel cell stack having a fuel cell unit provided with, in order to enable appropriately controlling a wet state before power generation efficiency of the fuel cell is reduced, a polymer electrolyte membrane having one surface thereof provided with an oxidizer electrode and another surface thereof provided with a fuel electrode. In the fuel cell: the fuel cell unit includes plural power generation cell units and a pair of wet state detection cell units; one of the pair of wet state detection cell units includes an excessively humidified state detection cell unit which is more sensitive of an excessively humidified state than the power generation cell units; and another one of the pair of wet state detection cell units includes a dry state detection cell unit which is more sensitive of a dry state than the power generation cell units.

The invention relates to a phase-change coupling bionic fin type automobile exhaust waste heat step power generation system. The system comprises an inner layer heat conduction structure, a middle semiconductor temperature difference power generation module and an outer layer fin radiator. The inner layer heat conduction structure is tightly attached to the outer wall of an exhaust pipe of an automobile, and the whole body of the inner layer heat conduction structure is in a hexagonal prism shape so as to supply a flat attachment point for the temperature difference power generation module; the heat conduction structure is filled with phase-change material fused salts so that the temperature of the outer wall of the heat conduction structure is uniform and constant and the heat in the automobile exhaust waste is accumulated. The middle semiconductor temperature difference power generation module employs a dual-layer design, the inner layer power generation module and the outer layer power generation module select different thermoelectric materials according to respective actual working temperature areas, and the optimal working temperature areas of the two power generation modulesare matched with the actual temperature areas of the two power generation modules so that the two layers of power generation modules work at the optimal temperature, and the cascade utilization of theautomobile exhaust waste heat is achieved. The outer layer fin radiator adopts a leaf-shaped bionic structure, and forced convection heat dissipation is performed by utilizing air flow generated whenan automobile runs. The automobile exhaust can be used for generating power, and the waste heat utilization of the exhaust is achieved.

A membrane electrode assembly (15) comprising a solid electrolyte membrane (16) and electro-catalyst layers (17, 18) is interposed between a pair of frames (13, 14). A gas diffusion layer (19) is laminated onto the surface of the electro-catalyst layer (17) while a gas diffusion layer (20) is laminated onto the surface of the electro-catalyst layer (18). A first gas flow path forming body (21) is laminated onto the surface of the gas diffusion layer (19) while a second gas flow path forming body (22) is laminated onto the surface of the gas diffusion layer (20). A separator (23) has contact with the surface of the frame (13) and the first gas flow path forming body (21) while a separator (24) has contact with the surface of the frame (14) and the second gas flow path forming body (22). The widths (w1, w2) of a plurality of first and second straight grooves (21c, 21d), which are formed on the first gas flow path forming body (21), are defined so as to be different from each other. Thus, the cross-sectional areas of the paths for the first and second gas flow paths (T1, T2) are defined so as to be different from each other.

A photovoltaic cell module in which a difference in color between a photovoltaic cell and the other portion is made to disappear and the changes of the color and appearance of its surface depending upon a viewing angle is hardly visually recognized, while suppressing the reduction of the power generation amount of the photovoltaic cell. The present photovoltaic cell module includes a thin plate-like photovoltaic cell enclosed in transparent sealing material; a transparent face plate laminated on the surface of the sealing material on the light receiving surface side of the photovoltaic cell; and a decorative layer laminated on the face plate, where a transparent resin is employed as base material of the decorative layer and light transmissive scaly glitter pigment is dispersed in the decorative layer such that the surface direction of the pigment is along the face plate surface.

A membrane electrode assembly includes an electrolyte membrane, an anode disposed on one face of the electrolyte membrane, and a cathode disposed on the other face of the electrolyte membrane. The electrolyte membrane has a non-electrode-forming region where the cathode is not disposed on the surface of the non-electrode-forming region and an electrode-forming region where the cathode is disposed on the surface of the electrode-forming region. The non-electrode-forming region has a thin membrane region where the membrane is thinner than that in the electrode-forming region. The drop in power generation efficiency by water generated at the cathodes is prevented.

A photovoltaic power generating system of the present invention includes a solar cell module 1, an installation platform 2 for holding a pair of ends of the solar cell module 1, and at least one supporting member 3 disposed on a side of a non-light-receiving surface 1B of the solar cell module 1, wherein the supporting member 3 is disposed at such a distance from the non-light-receiving surface 1B of the solar cell module 1 that the supporting member 3 can abut against the non-light-receiving surface 1B by deformation of the solar cell module 1. A deforming amount of the solar cell module 1 is increased in accordance with an external force applied to the solar cell module 1.

A solar cell module reverse face protection sheet reduces absorption of sunlight to depress temperature rise in a solar cell module and serves for efficient use of reflected light for power generation, thereby ensuring a high power generation efficiency and maintaining a high partial discharge voltage. The solar cell module reverse face protection sheet includes a white polyolefin film and a hydrolysis resistant polyester film, wherein the absorptance is 10% or less for light in the wavelength range of 400 to 2,200 nm coming through the white polyolefin film while the reflectance for light in the above wavelength range is 70% or more.

Provided is a transparent conductive film used in liquid-crystal display devices, electroluminescent display devices, and the like, and is particularly suitable for use in solar cells. Also provided is a solar cell using said transparent conductive film and a sputtering target suited to forming said transparent conductive film. The provided transparent conductive film, which is highly moisture-resistant, comprises oxides of aluminum, magnesium, gallium, and zinc. Between 0.7% and 7% of the metal atoms in the transparent conductive film are aluminum, between 9.2% and 25% are magnesium, between 0.015% and 0.085% are gallium, and the remainder are zinc.

The invention provides a friction nanogenerator with a lubricant which comprises two friction parts which slide relative to each other, wherein the mutually contacted and sliding surfaces are made ofmaterials with different surface electronegativity, a liquid lubricant is arranged between the two mutually sliding friction parts, and when the two mutually sliding friction parts slide, the generator generates charge output to the outside under the action of surface friction electrification effect and electrostatic induction. According to the technical scheme, material abrasion can be reduced, materials are saved, the replacement period is prolonged, the operation cost is reduced, and finally the power generation cost is reduced. Under the action of the liquid lubricant, the transfer of polar components in the air to charges is reduced; the solid-solid effective contact area is increased, and the output performance can be improved.

An integrated coal gasification combined cycle facility is provided that can prevent a reduction in power generation efficiency even when low-grade coal having a relatively-high moisture content is used. Included are: a gasification section that gasifies supplied coal; a gas power generation section that generates power by using gas supplied from the gasification section; a steam power generation section that generates power by using the heat of exhaust gas discharged from the gas power generation section; and a coal drying unit that dries the coal by using exhaust heat discharged from the steam power generation section and that supplies the dried coal to the gasification section.

Generally, solar cell panels are black, being inferior in design. An object of the invention is to provide a transparent plate which develops color without lowering power generation efficiency; and a solar cell panel which uses such transparent plate. A solar cell panel according to the invention has a construction such that the solar cell is covered by a transparent plate which is characterized by absorbing infrared light and emitting visible light. Since the transparent plate develops color by using infrared light which does not contribute to power generation, there is obtained a solar cell panel which is superior in the viewpoint of decoration without lowering the power generation efficiency of solar cells.

There is disclosed a pair of solar-cell-sealing sheets comprising a sealing sheet on each of a light-receiving side and a reverse-surface-side of a electricity-generating element of a solar cell module, wherein the solar-cell-sealing sheet is characterized in that a differential-scanning-calorimetry (DSC)-based melting-peak temperature of the reverse-surface-side sealing sheet is higher than the DSC-based melting-peak temperature of the light-receiving-surface-side sealing sheet, there being less wraparound of reverse-surface-side sealing material in the solar-cell-sealing sheet. Also disclosed are a solar cell module in which the light-receiving-surface-side sealing sheet and reverse-side sealing sheet of the solar-cell-sealing sheets are used, and a method of manufacturing the module.

The present invention provides a wind turbine generator and a method of controlling the same which can prevent the decline in power generation efficiency even when the generator is located where the wind is not always strong. The wind turbine generator mainly includes an anemometer, an anemoscope, a nacelle swiveling mechanism which turns a nacelle, and a control unit which controls the nacelle swiveling mechanism. The control unit controls the nacelle swiveling mechanism so as to swivel the nacelle based on the wind direction obtained from the measurement result of the anemoscope when the wind speed obtained from the measurement result of the anemometer is greater than a first threshold Vth1 which is smaller than a cut-in wind speed Vcut<sub2>—< / sub2>in, and controls the nacelle swiveling mechanism so as to stop the swiveling of the nacelle when the wind speed obtained from the measurement result of the anemometer is not greater than a first threshold Vth1.