7results about How to "Reduce volume ratio" patented technology

This invention relates to the field of petroleum refining and chemical engineering, and discloses a method for hydrogenating waste tire pyrolysis oil. The method includes the following steps: (1) in the presence of hydrogen, the waste tire pyrolysis oil raw material undergoes a gas-phase desulfurization reaction in a first gas-phase hydrogenation reactor to obtain a gas-phase desulfurization reaction product; (2) the gas-phase desulfurization reaction product is subjected to gas-liquid separation to obtain a gas-phase component and a liquid-phase component; (3) the liquid-phase component is pressurized and mixed with hydrogen, and then subjected to a liquid-phase dearomatics reaction in a second hydrogenation reactor to obtain a liquid-phase dearomatics reaction product; the nitrogen content in the waste tire pyrolysis oil raw material is 3000-10000 μg / g. This method uses waste tire pyrolysis oil from the middle distillate as raw material, achieving deep desulfurization while reducing the removal of nitrogen oxides and monocyclic aromatic hydrocarbon saturation. It also simplifies the overall process flow, reduces the reaction severity, and lowers energy and hydrogen consumption.

The utility model discloses a shooting device and a surgical field shooting device, in the technical scheme of the shooting device, a first stator and a first rotor are parts with larger volume proportion in a first brushless motor, and the first stator and the first rotor are accommodated in a first mounting groove of the shooting device; according to the technical scheme, the first stator and the first rotor do not need to occupy the internal space of the installation holder, so that the installation of different overall volumes is reduced, the installation holder is small and exquisite, the first brushless motor can be prevented from being directly exposed, and the overall appearance structure of the shooting equipment is simpler and more compact; compared with the mode that the first stator and the first rotor are installed in the installation holder, the mode that the first stator and the first rotor are installed in the first installation groove enables the volume increase proportion of the shooting device to be small, namely the volume of the shooting device is not obviously increased, and therefore the whole appearance of the shooting device can be kept simple and small. Application and installation of the shooting equipment are facilitated.

The application discloses a photovoltaic system and a capacity-ratio control method. The photovoltaic system comprises a DCAC converter, N DCDC converters and a controller, wherein N is an integer greater than or equal to 2; an input end of each DCDC converter is used for connecting a corresponding photovoltaic string, and output ends of the N DCDC converters are all connected to an input end of the DCAC converter; the controller is used for controlling M DCDC converters in the N DCDC converters to work in a conduction state when it is necessary to reduce a capacity ratio of the photovoltaic system, and stopping energy of corresponding photovoltaic strings from entering the DCAC converter; and M is an integer greater than or equal to 1 and smaller than N. After the capacity ratio of the photovoltaic system is reduced, the output power of the DCDC converter will be improved, so that the power generation capacity of the photovoltaic system is improved, and the power generation efficiency is improved.

This electrochemical cell has a working electrode (104) and a counter electrode (106), and adsorbs and desorbs a gas at the working electrode by applying a voltage between the working electrode and the counter electrode. At least one of the working electrode and the counter electrode has conductive particles (104b) that are in contact with each other and form a conductive path, and functional particles (104a) that do not form a conductive path. The particle diameter of the conductive particles is equal to or greater than the particle diameter of the functional particles.

The invention provides a fuel cell thermal management system of a loop heat pipe, and belongs to the technical field of fuel cells. The fuel cell thermal management system of the loop heat pipe comprises a liquid storage tank, a temperature control unit, a first electromagnetic valve, a working medium pump, an evaporator inlet preheater, a fuel cell stack, a second electromagnetic valve, a condenser and a condenser outlet preheater, the temperature control unit is arranged on the liquid storage tank and used for adjusting the temperature of a liquid working medium in the liquid storage tank, and the first electromagnetic valve is arranged on the first electromagnetic valve. The fuel cell stack is provided with a liquid working medium channel, an outlet of the liquid storage tank is connected with the evaporator inlet preheater through a first electromagnetic valve and then connected with an inlet of the liquid working medium channel, an outlet of the liquid working medium channel is connected with an inlet of the condenser through a second electromagnetic valve, and an outlet of the condenser is connected with the condenser outlet preheater and then connected with the condenser outlet preheater. The working medium pump is connected with an inlet of the liquid storage tank and used for providing flowing power of the liquid working medium. The characteristic of high two-phase state heat exchange capacity is ingeniously utilized, and the cooling efficiency is improved.

The present invention discloses a variable width laying method of a trapezoidal grid tow, comprising the following steps: step 1, determining the basic parameters of the mold rib groove; step 2, determining the thickness t of the prepreg tow; step 3, determining the total number of layers N of the prepreg tow laid in the mold rib groove; step 4, determining the maximum number of layers n of the prepreg tow bent and laid in the mold rib groove; step 5, bending and laying the first layer of prepreg tow in a manner close to the inner wall of the mold rib groove, bending and laying n-1 layers of prepreg tow in sequence in a manner close to the adjacent prepreg tow in the lower layer, and horizontally laying N-n layers of prepreg tow in sequence on the nth layer of prepreg tow in a manner close to the adjacent prepreg tow in the lower layer. For prepreg tows of the same thickness in the same mold rib groove, the number of cavities generated by the method of the present invention is reduced compared with the prior art, thereby reducing the volume ratio of the cavity, and further reducing the influence of the cavity on the performance of the rib.

The application discloses a transformer magnetic integration structure integrating double direct-current inductors and leakage inductors and an integration method thereof. In order to overcome the problems of complex magnetic core structure design, large leakage magnetic flux and lack of universality of the integration method in the prior art, the application uses a single standard EE magnetic core to realize integration of double direct-current inductors, leakage inductors and transformers by reasonably designing winding connection mode and air gap parameters for the transformer with three magnetic element structures of direct-current inductor, leakage inductor and transformer. Compared with separate magnetic components, the application can reduce the number of magnetic elements of the transformer, reduce the volume proportion of the magnetic components in the transformer, further reduce the volume of the transformer system, improve the power density, simplify the magnetic core design, reduce the manufacturing complexity of the magnetic integration structure, suppress the unbalanced current of the two side column windings, realize high-efficiency and high-power-density operation of the system, and improve the stability and reliability of the system operation.