11results about How to "Increase pressure ratio" patented technology

The invention discloses a methane pre-cooling fuel gas generator circulation turbine enhanced combined power system which comprises a fuel turbine, a heat exchanger, a gas generator, a gas generator, a gas generator, a gas generator, a gas generator, a gas generator and a gas generator, and is characterized in that the heat exchanger is used for providing heat for fuel from a fuel pump and conveying high-temperature fuel gas to the fuel turbine so as to drive the fuel turbine to rotate; the oxidant turbine is used for driving the oxidant turbine to rotate by taking the high-temperature fuel gas output by the heat exchanger and the high-temperature fuel gas flowing out of the fuel turbine as power, so that the oxidant turbine drives the oxidant pump to work; high-temperature fuel gas obtained after the fuel from the fuel pump is heated by the heat exchanger is also used for being converged with high-temperature fuel gas sequentially passing through the fuel turbine and the oxidant turbine and then entering the fuel gas generator; liquid methane is adopted for precooling incoming flow, the total temperature of incoming flow behind an air inlet channel is effectively reduced, the upper limit of the working Mach number of the turbine core machine can be expanded to be larger than Ma3.5, a stamping mode matched with the turbine core machine only needs to consider the working speed range larger than Ma3.5, and the working performance of the turbine core machine can be well released.

The invention discloses an environment regulation and control device and method suitable for an intelligent control cabinet of a transformer substation. The environment regulation and control device comprises a controller, a sensing module, a gas transmission tail end regulation and control module, an auxiliary module and a gas source module. The sensing module comprises a temperature and humidity sensor arranged in the intelligent control cabinet; the air source module comprises a precooler, an air inlet buffer device, a compressor, an aftercooler and a drying pressure stabilizing device which are connected in sequence; the gas transmission tail end regulation and control module comprises a regulation valve group and an expansion machine; the auxiliary module comprises auxiliary compressors, and each auxiliary compressor and one expansion machine are coaxially arranged. According to the environment regulation and control device and method suitable for the intelligent control cabinet of the transformer substation, the centralized and reasonable environment regulation and control device is designed for a large number of outdoor intelligent control cabinets in the transformer substation, and the intelligent control cabinet of the transformer substation can be safer and more reliable in combination with a specific regulation and control method; and the intelligent control process of the intelligent control cabinet of the transformer substation is promoted.

The invention provides an impeller structure for widening the pressure ratio and flow range of a gas compressor, which is a semi-open impeller and comprises a wheel disc, a wheel shaft and blades, the wheel shaft is arranged in the middle of the wheel disc, and the blades are evenly arranged between the wheel shaft and the wheel disc with the wheel shaft as the center. The blades comprise the main blades and the auxiliary blades, the auxiliary blades are arranged between the two main blades, and the height of the main blades is larger than that of the auxiliary blades. According to the wing-shaped swept impeller, the front edge of the blade is subjected to swept-forward design, the front edge molded line is subjected to optimization design on the basis, so that the wing-shaped swept impeller is formed, the pressure ratio and the flow range of a gas compressor can be effectively widened, and the purpose of meeting engineering requirements is achieved.

The present invention discloses a combined cooling, heating and power system and a working method thereof, belonging to the field of energy utilization technology. The system comprises an S-CO2 heater, an S-CO2 expander, a first generator, a first regenerator, a heat exchanger, a first Kalina generator, a compressor, an electric motor, a second Kalina generator, a precooler, a gas-liquid separator, a Kalina expander, a second generator, a mixer, a condenser, a second regenerator, a first throttle valve, an ejector, a second throttle valve and an evaporator. The heat transfer medium heated by solar energy first drives the S-CO2 power generation and heating module, and then uses the remaining heat to drive the Kalina power generation and refrigeration module, which can realize the cascade utilization of thermal energy and improve the energy utilization efficiency; and can meet the summer cooling and winter heating needs while generating electricity; at the same time, the system is simple and flexible, and can meet the needs of different users.

The invention discloses a design method of a centrifugal compressor with an asymmetric bladed diffuser coupled with a volute tongue, which adopts the asymmetric bladed diffuser and increases the distance from the outlet of the diffuser to the volute tongue on the asymmetric bladed diffuser to improve the structure of the existing centrifugal compressor. The non-uniformity, caused by a volute tongue structure, of an internal flow field of the centrifugal compressor is effectively reduced, internal flow separation of the vaned diffuser is restrained, the efficiency and the pressure ratio of the compressor are improved, meanwhile, the stable working range of the centrifugal compressor is widened, and the pneumatic stability of the centrifugal compressor is improved.

The invention discloses a mixed-flow compressor and a mixed-flow method. At present, due to the adoption of a two-stage centrifugal compressor, the efficiency is reduced due to too many turning of a flow channel, and meanwhile, complexity is caused when double shafts are adopted. The multi-stage centrifugal compressor comprises a multi-stage axial flow compressor A and a single-stage centrifugal compressor B, wherein the multi-stage axial flow compressor and the single-stage centrifugal compressor share the same rotor; the multi-stage axial-flow compressor comprises an air inlet chamber, an axial-flow compressor casing and a compressor rotor, a plurality of groups of axial-flow compressor moving blades are fixed on the outer ring surface of the compressor rotor, a plurality of groups of compressor guide blade assemblies are fixed in the axial-flow compressor casing, and the axial-flow compressor moving blades and the compressor guide blade assemblies are arranged at intervals; a plurality of groups of rotor wheel discs are fixed in the compressor rotor; the centrifugal wheel disc of the single-stage centrifugal compressor is connected with the last-stage rotor wheel disc of the multi-stage axial flow compressor through a flange; and the centrifugal compressor casing is connected with the axial flow compressor casing through a flange. The invention is applied to the mixed-flow compressor.

The invention belongs to the technical field of energy storage, and particularly provides a double-liquid-state energy storage system and method based on adjustable CO2 mixed working medium components, and the system uses a mixture of CO2 and organic matter as an operation working medium for compression energy storage. The system uses the regenerator to realize gas-liquid conversion at a low-pressure end, so that a low-pressure working medium is stored in a liquid state, and uses the heat exchanger to realize gas-liquid conversion at a high-pressure end, so that a high-pressure working medium is stored in a liquid state. The working medium in the storage tank has gas and liquid phases at the same time, and the component proportions of the gaseous working medium and the liquid working medium are different, so that the component proportion of the mixed working medium in circulation can be adjusted by adjusting the flow proportion of gas and liquid, and the performance of the energy storage system is improved.

The invention belongs to the technical field of proton exchange membrane fuel cells, and relates to a hydrogen circulating pump with a high-performance runner. The area of the first cross section of the first shell flow channel (13) after the section of the initial air inlet (12) is removed is S1, the area of the last cross section of the first shell flow channel (13) before the section of the final air outlet (13) is S2, the area of the cross section of the air inlet (12) is S12, the area of the cross section of the air outlet (13) is S13, and S12 and S1 meet the following relational expression: S12 = 1.05-1.3 * n * S1; s13 and S2 meet the following relational expression: S13 = (0.8-1.05) * n * S2; wherein n is equal to 1 when a single-side flow channel is used, and n is equal to 2 when a double-side flow channel is used. According to the hydrogen circulating pump with the high-performance flow channel, the flow channel has a linear AR ratio, so that under the condition that the overall shape of the circulating pump is slightly changed, the gas flow can be increased, the pressure ratio of the hydrogen pump is increased, the flow loss is reduced, the efficiency of the hydrogen pump is improved, and the performance of the hydrogen circulating pump is improved.

The application discloses a single-rotor turbofan engine, which comprises a rotating shaft, a fan, a centrifugal compressor, a turbine and a combustion chamber, all of which are located in an engine outer casing shell; the fan rotor, the centrifugal compressor rotor and the turbine rotor are fixedly assembled on the rotating shaft in sequence; a fan airflow channel is formed between the inner wall of the engine outer casing shell and the fan rotor, an inner bypass channel leads to the centrifugal compressor, and an outer bypass channel leads to the exhaust port of the engine; after the inner bypass airflow is discharged from the centrifugal compressor, the inner bypass airflow enters the combustion chamber to be mixed with fuel and combusted to generate high-temperature and high-pressure gas, which drives the turbine rotor to rotate and drives the fan rotor and the centrifugal compressor rotor coaxially arranged with the turbine rotor to rotate to perform work on airflow pressurization; and the high-temperature and high-pressure gas drives the turbine rotor to rotate and is discharged from the exhaust port. The single-rotor turbofan engine has the advantages of less pressurization stages, high pressure ratio, small engine size, simple structure, good reliability and reduced manufacturing cost.

The invention discloses a compressed air energy storage system based on a compression-expansion dual-purpose unit, relates to the technical field of compressed air energy storage, and solves the technical problem that the existing compressed air energy storage system is relatively complex and has a high cost. The key points of the technical solution are to use a single-stage multi-cylinder rotary compression-expansion dual-purpose unit to replace two sets of equipment, a compressor unit and an expansion unit, which has the advantages of large and adjustable pressure ratio, high isentropic efficiency, low manufacturing cost and suitability for large and medium-sized units; water is used to adjust the compressed air outlet temperature and to enhance the heat transfer of the heat exchanger; an air-water separator, a small water tank and an air-water mixer are provided to achieve the water sprayed in the compression and inflation process. After being cooled by the heat exchanger, it is stored under high pressure and reused in the expansion work process, which can increase the working capacity of the compressed air in the expander and also enhance the heat transfer of the heat exchanger.

The fluid oscillator is applied to the control method of high-load compressor corner area flow separation, and the structure of the fluid oscillator comprises an air inlet, a porous material, an intermediate transition section, a micro controllable valve, an inlet and an outlet, the air inlet is adjacent to the pressure surface side of the compressor blade, the porous material is connected with the air inlet, one end of the intermediate transition section is connected with the air inlet, the other end of the intermediate transition section is connected with the micro controllable valve, the micro controllable valve is connected with the inlet, the inlet is connected with the outlet, and the outlet is located on the end wall near the compressor cascade corner area. Compared with the traditional technology, the application does not need an external air source, has the advantages of simple structure, small volume and weight, long-term work reliability and strong engineering practicability. Through the method, the flow separation near the compressor corner area can be effectively inhibited, the single-stage compressor can obtain a higher pressure ratio, and the turbomachinery has a larger thrust-to-weight ratio and higher efficiency.