36results about How to "Improve isentropic efficiency" patented technology

A refrigerant system is provided with at least two sequential stages of compression. An intercooler is positioned intermediate the two stages. The refrigerant flowing through the intercooler is cooled by a secondary fluid such as ambient air. A vapor / liquid injection function is also provided for the refrigerant system. The intercooler function and the vapor / liquid injection function are selectively activated on demand depending on environmental conditions and thermal load in a conditioned space. This invention is particularly important for the CO2 refrigerant systems operating in the transcritical cycle.

Cold-heat effect of shock oscillation tube combined with jet oscillation technique is adopted in the invention to reach purpose of refrigeration. The machine is composed of main machine body, static ejector nozzle, oscillation receiving tube and acoustic oscillator etc. Under combined action of gas distributor and acoustic oscillator, gas is jetted in periodic deflexion and periodic intermittent into receiving tubes around to generate flow in high frequency oscillation. Further, under interaction effect and inference of series of wave including shock wave, compression wave and expansion wave, the machine completes unsteady expanding work and energy conversion so as to realize refrigeration through gas. Features are simple structure adjustable continuous flow, suitable to work medium in phases of gas and liquid.

The invention discloses a multistage air supplementing screw compressor with an economizer loop. More than two compression stages are executed on a pair of male and female rotors, wherein each mutually separated compression stage is provided with at least two air supplementing ports at different positions; the air supplementing ports at different positions are located at the same air supplementingpressure or different air supplementing pressure positions, and at least two air supplementing ports at different compression stages are located at different air supplementing pressure positions respectively. When the compression ratio is greater than a first preset numerical value, the air supplementing loops of the first compression stage and the second compression stage are opened; when the compression ratio is greater than the second preset value and less than the first preset value, the air supplementing loop of the first compression stage is opened; when the compression ratio is less than a second preset numerical value, the air supplementing loop of the first compression stage is opened or closed. The screw compressor can adapt to further improvement of capacity and energy efficiency under the large-pressure-ratio working condition, the exhaust temperature of the screw compressor can be reduced, the operation range of the compressor is expanded, and the reliability of the compressor is improved.

The invention provides a sliding vane type expansion working machine. The working machine comprises a shell, a revolving shaft, clamping slots, a spring, a sliding slice, an air inlet pipe and an exhaust pipe, wherein the shell is of an oval structure, the length of a short shaft of the shell is equal to that of the diameter of the revolving shaft, and the same circumference of the external surface of the revolving shaft is provided with a plurality of clamping slots; the clamping slots are symmetrically distributed, one end of the spring is fixedly connected with the bottoms of the clamping slots, and the other end of the spring is connected with one end of the sliding slice; the other end of the sliding slice is contacted with the inner surface of the shell, the interior of the shell is divided into an upper working cavity and a lower working cavity by virtue of the revolving shaft, and the air inlet pipe and the exhaust pipe are respectively communicated with the two sides of the working cavity. The sliding vane type expansion working machine has the advantages that an expansion machine with a fixed volumetric ratio is high in expansion isentropic efficiency, the homocentric design of the revolving shaft and the shell has the advantages of slight vibration, low side pressure, small friction and volume, capability of rapidly operating and the like, the whole machine structure is high in reliability and low in manufacturing cost, and the working effects such as high-temperature gas resistance and high isentropic expansion efficiency are realized.

The invention provides an axial flow type turbine with a small blade structure. The axial flow type turbine comprises a hub, a plurality of main blades and a plurality of small blades, wherein the hub is provided with a front end surface and a circumferential surface; the plurality of main blades are evenly arranged on the circumferential surface of the hub and are provided with pressure surfaces, force absorbing surfaces and main blade connecting surfaces, and the main blade connecting surfaces are provided with first front edges; and the small blades and the main blades are alternately arranged, the small blades are provided with small blade connecting surfaces, and the small blade connecting surfaces are provided with second front edges. The radial height of the small blades is h, the radial height of the main blades is H, and h / H is 0.05-0.3. The axial chord length of the small blade connecting surfaces is L1, the axial chord length of the main blade connecting surfaces is L2, and L1 / L2 is 0.2-0.6. The axial length from the second front edges of the small blade connecting surfaces to the first front edges of the main blade connecting surfaces is m, and m / L is 0-0.4. The circumferential angle between the first front edges of the two adjacent main blade connecting surfaces is theta1, the circumferential angle between the first front edges of the main blade connecting surfaces and the second front edges, corresponding to the force absorbing surfaces, of the small blade connecting surfaces is theta2, and theta2 / theta1 is 0.3-0.8.

The invention relates to a scroll compressor for a motor vehicle air-conditioning system. The scroll compressor includes a compressor housing, two interleaving spirals 1 within the compressor housing,of which one spiral 1.1 is stationary and the other spiral 1.2 is movable eccentrically on a circular orbit, whereby the volume of compression chambers 15.1,15.1';15.2,15.2';15.3 formed between the spirals changes cyclically and refrigerant is suctioned in and compressed; at least one refrigerant outlet port for ejecting the compressed refrigerant in a wall, frontal to the spirals 1, of the compressor housing in the center of the stationary spiral 1.1, wherein in the spiral end region on the inner end 2 of at least one of the two spirals 1.1, 1.2 the concave side 3 of the spiral wall is provided with a cut that has the form of a cone segment with concave curvature, decreasing from the upper end 6 in the direction toward the lower end of the spiral wall.

The object of the present invention is to provide a kind of oily sludge pyrolysis energy recovery system based on single-screw expander, to make full use of a large amount of waste heat resources existing in the present sludge pyrolysis system, including pyrolysis reactor, used for sludge sludge pyrolysis Pyrolysis into pyrolysis flue gas, cracked oil gas and solid residue; the pyrolysis flue gas outlet of the pyrolysis reactor is connected to the first evaporator, and the pyrolysis flue gas and the first organic working fluid are realized in the first evaporator The first evaporator is also connected to a flue gas purification device for discharging pyrolysis flue gas; the first evaporator is provided with a first organic working medium inlet and a first organic working medium outlet, and the first An organic working medium outlet is connected in series with the first single-screw expander, the first condenser and the first working medium pump through the pipeline, and then connected back to the first organic working medium inlet; the first single-screw expander and the first Generator connection.

The invention discloses a device capable of adopting a secondary flow mechanism and improving the non-azeotropic working medium Rankine cycle efficiency. The device comprises a steam generator, an expansion mechanism, an electric generator, a condenser, a liquid accumulator, a working medium pump, a preheater and a control mechanism. The device solves the heat transfer deterioration problem generated in the evaporation heat transfer process of non-azeotropic mixed working media, and heating of high-pressure side working medium fluid is divided into two steps carried out by the preheater and an evaporator, and a plate type heat exchanger with the small resistance loss and high heat exchange coefficients is adopted by the preheater and is used for removing supercooling of the working media. The optimized-design secondary flow mechanism is adopted by the evaporator, the disturbance and mixing action is introduced, the heat transfer mass transfer resistance added by the non-azeotropic working media is overcome, and the cycle efficiency is improved. The device is widely applied to efficient utilization of medium and low temperature heat energy, the medium and low temperature heat energy can be efficiently converted into mechanical energy and electric energy, and waste heat utilization of renewable energy sources is promoted.