12 results about "Energy conversion efficiency" patented technology

The invention relates to a hybrid driving system, which comprises an internal-combustion engine, a first motor, a second motor, a power output shaft used for outputting power, a first brake, a second brake, a first transmission mechanism, and a second transmission mechanism. Two connected transmission mechanisms and brakes are arranged in the hybrid driving system. When the two brakes respectively brake, the two transmission mechanisms are in two different connection modes, namely two different transmission ratios (tap positions) are formed, therefore various working modes and corresponding tap positions can be selected according to different driving conditions of a vehicle, and driving requirements of the vehicle under different working conditions can be met further. Besides, by the adoption of the hybrid driving system provided by the invention, the low-speed torsion of the whole vehicle can be increased and the starting is quickened, moreover, the highest efficiency of the internal-combustion engine can be exerted under a high-speed condition, thereby promoting energy conversion efficiency, reducing tail gas emission and energy loss, and finally achieving the effects of low emission, low fuel consumption and high kinetic energy of the whole vehicle.

The invention relates to a mechanical combination type oscillating floater wave energy power generation device. The mechanical combination type oscillating floater wave energy power generation device comprises a power generation system and a fixing system, wherein the fixing system comprises a buoyancy tank and a fixing frame. The fixing frame is in a cubic structure and is fixedly connected with the top portion of the buoyancy tank, and stand columns are respectively arranged on four corners of a side surface of the fixing frame. The power generation system is composed of four groups of same power generation mechanisms which are respectively arranged on the stand columns of the fixing frame, each power generation mechanism comprises a floater, an energy conversion device and an energy output device, and each energy output device comprises two generators which are fixed on the top portion of the floater. Two one-way gears are respectively sleeved at the top ends of input shafts of the generators on the same side and are connected with the input shafts of the generators through keys. Two racks are respectively meshed with the one-way gears on the same side. The mechanical combination type oscillating floater wave energy power generation device contacts with a wave directly and is high in energy conversion efficiency, low in device construction cost, stable in output electric energy and wide in application.

The present invention relates to a conductive paste and a solar cell. The conductive paste contains a conductive powder, including at least a silver powder, a glass frit composed mainly of Te, Bi and Zn, and an organic vehicle. The total molar quantity of the three components of Te, Bi and Zn contained in the glass frit is, in terms of oxide, set at 95 mol% or more. Light-receiving surface electrodes (3) are formed by using the above-conductive paste. Thereby, a conductive paste suitable for forming solar cell electrodes is achieved, the conductive paste being capable of reducing both of the contact resistance between the electrodes and the semiconductor substrate, and the line resistance of the electrodes, while being lead free. Furthermore, a solar cell having high energy conversion efficiency and excellent battery characteristics is achieved as a result of using the conductive paste.

The invention discloses a rectifier circuit for piezoelectric energy collectors to solve the problem that the energy consumption of an existing circuit is high and the efficiency of a piezoelectric energy collector is low when the rectifier voltage of the piezoelectric energy collector is greater than 2.5 V. The rectifier circuit comprises a full-wave rectifier bridge (2) and an active diode circuit (4), and further comprises a bias circuit (3). The output end of the full-wave rectifier bridge (2) is connected with the input ends of the active diode circuit (4) and the bias circuit (3). The output end of the bias circuit (3) is connected with the bias voltage end of a comparator in the active diode circuit (4). The output end of the active diode circuit (4) is connected with an energy storage capacitor C3. The rectifier circuit for piezoelectric energy collectors has the advantages of being low in power consumption, high in energy conversion efficiency, and capable of ensuring the energy demand of wireless sensor network node load.

The invention relates to a power cabinet, and especially relates to a solar moisture-proof power cabinet. A technical problem to be solved is to provide the solar moisture-proof power cabinet which can resist moisture and is quick in cooling. In order to solve the above technical problem, the power cabinet comprises a box body, a first filter screen plate, a hinge, a box door, a box bolt, and a lifting device. The bottom of the box body is provided with a through hole, and the left wall of the box body is provided with the first filter screen plate. The left side of the front part of the box body is connected with the hinge, and the hinge is connected with the box door. The box door is closely attached to the front part of the box body, and the right side of the box door is provided with the door bolt. The door bolt is connected with the box body, and the internal right wall of the box body is provided with the lifting device. The left side of the lifting device is provided with a fan, and the top of the box body is provided with a solar panel. The cabinet achieves effects of moisture resistance and quick cooling, and the angle of the solar panel can be adjusted. The solar panel can be adjusted to the optimal irradiation angle, so as to improve the solar conversion efficiency.

The invention relates to a gas combined heat and power generation system and a control method thereof. The gas combined heat and power generation system comprises a first compressor, a high-temperature boiler, a second compressor, a material storage chamber, a gas engine, a gas turbine device, a generator, a high-temperature waste heat recycling device, a low-temperature waste heat recycling device, a waste heat boiler and an air preheater. By means of the gas combined heat and power generation system and the control method thereof, the gas combined heat and power generation function is comprehensively achieved, by means of the high-temperature boiler, the gas engine, the gas turbine device, the generator, the high-temperature waste heat recycling device, the low-temperature waste heat recycling device, the waste heat boiler and the air preheater, comprehensive recycling of power energy and heat energy is achieved, and the energy conversion efficiency of the system can be further improved.

The invention discloses an energy recovery device utilizing piezoelectric stack energy harvesting. The energy recovery device comprises a support, a lever amplification assembly connected with the support, a piezoelectric stack arranged between the support and the lever amplification assembly and used for converting mechanical energy of a lever amplification mechanism into electric energy to be output, and a pre-tightening assembly. According to the energy recovery device for capturing energy by utilizing the piezoelectric stack, deformation generated by vibration of the excitation source canbe effectively converted into excitation force acting on the piezoelectric stack through the amplification mechanism, so that the piezoelectric stack generates greater deformation, and energy output is increased; the output current can be remarkably increased, the output impedance of the energy recovery device is reduced, and the energy conversion efficiency is effectively improved; the device hasthe technical advantages of being simple in mechanical structure, convenient to machine and the like, energy can be supplied to an intelligent equipment system through energy collection, and the device has wide application prospects in the fields of wireless technologies and electromechanical systems.

The invention discloses a modeling method of an energy distributor based on a bus-type structure. The traditional energy system planning only faces the single energy system, which artificially cuts off the optimal allocation of resources in each energy system and reduces the overall energy efficiency. The modeling method of the invention comprises the following steps: 1) establishing a plurality of bus-type interface models according to user requirements; 2) combining a plurality of bus-type interface models according to the actual application scenario to obtain an energy distributor. The invention uniformly dispatches the four energy sources of electricity, heat, cold and gas, reasonably allocates the use paths of the energy sources, and fully exerts the complementary characteristics andsynergistic effects of different energy sources; the invention makes the internal structure of the energy distributor clear and concise, and is convenient for the user to carry out modular modeling, and bus-type modeling is carried out on the interior of the energy distributor according to the type of the energy conversion device.

The invention discloses a casting die capable of achieving good forming. The casting die comprises an upper die body (1) and a lower die body (2) which are both made of furan resin self-hardening sand, and the upper die body (1) is connected with the lower die body (2) through studs (11); the upper surface of the lower die body (2) is provided with a cavity matched with the shape of an impeller, multiple chilling blocks (21) are inlaid into the cavity, and the positions of the chilling blocks (21) correspond to the far ends of blades (31); and a main flow channel (13) is arranged in the upperdie body (1), the upper end of the main flow channel (13) is located on the upper surface of the upper die body (1), the lower end of the main flow channel (13) extends into the lower die body (2) andis connected with multiple branch flow channels (14) distributed in the circumferential direction, the end of each branch flow channel (14) is provided with a pouring gate (15), and the positions ofthe pouring gates (15) correspond to the inner wall of a shaft sleeve (32). The casting die capable of achieving good forming has the advantages of being high in casting qualification rate, low in machining cost and material cost and high in energy conversion efficiency and manufacture speed.

The invention discloses a photovoltaic power generation system maximum power tracing device. The device comprises a solar photovoltaic component, a current transformer, a voltage transformer and a maximum power tracing solar controller, wherein the input end of the current transformer and the input end of the voltage transformer are both connected with the solar photovoltaic component, the output end of the current transformer and the output end of the voltage transformer are connected with the maximum power tracing solar controller, the maximum power tracing solar controller is connected with a power output module through a power driving module, and the power output module is connected with a load. The device is simple in structural principle, high in intelligence degree, high in control precision, and capable of achieving photovoltaic power generation maximum power tracing, improving power conversion efficiency and reducing electric energy consumption.

The invention discloses an InGaN/GaN heterogeneous epitaxial structure and a growing method thereof. The epitaxial structure comprises a substrate which is made of sapphire, silicon, silicon carbide,gallium nitride or gallium arsenide, a GaN layer which grows on the substrate, an InGaN active region which grows on the GaN layer and a GaN layer which grows on the InGaN active region. According tothe InGaN/GaN heterogeneous epitaxial structure and the growing method thereof, the energy conversion efficiency of an InGaN-based solar cell can be remarkably improved.