120results about How to "Improve thermal cycle efficiency" patented technology

The invention discloses a combined cycle engine and a hypersonic aircraft which includes a rotary detonation ramjet engine and a rocket engine arranged therein. The rotary detonation ramjet engine includes a shell and a conical inner body, wherein the shell is in a hollow cylindrical shape and two ends communicate, and the after body of the conical inner body stretches into the shell from an air inlet end of the shell and is connected with the shell. And a gap between the shell and the after body forms a drainage channel for air to be led in the shell. A cavity between the rear end surface ofthe after body and the inner wall of the shell forms a detonation chamber which communicates with the drainage channel, and a first exhaust nozzle communicates with the detonation chamber. The rocketengine includes a combustion chamber arranged in the conical inner body, a second exhaust nozzle communicating with the combustion chamber, and the nozzle of the second exhaust nozzle communicates with the detonation chamber. The outer wall of the shell is machined with an outer nozzle, the two ends of the outer nozzle correspondingly communicates with a fuel supply device and the drainage channel. The outer wall of and/or the after body is machined with multiple internal nozzles, two ends of the internal nozzles correspondingly communicate with the fuel supply device and the drainage channel.

The present invention relates to a pulse detonation rotor shaft engine. In the technical proposal, the pulse detonation rotor shaft engine mainly consists of a pulse detonation engine, a rotor and an output shaft; propulsive gas with the high temperature and high pressure expansion of pulse which is ejected when the pulse detonation engine works is used as a power source to push the rotor to rotate; the rotor drives the output shaft to rotate; a pulse detonation rotor shaft engine uses the output shaft to output most energy produced by the pulse detonation engine by outputting torsion continuously; the output shaft drives various kinds of loads to work. The pulse detonation rotor shaft engine has the beneficial effects as follows: firstly, the pulse detonation rotor shaft engine can be used as a shaft engine to be widely applied in various kinds of dynamic systems, such as ship, submarine, tank, tractor, automobile, train, and the like and has wide purposes; secondly, the pulse detonation rotor shaft engine overcomes the disadvantage of the large noise of the prior pulse detonation engine; thirdly, compared with a piston type engine, the pulse detonation rotor shaft engine has the obvious advantages of simple structure, low cost, high reliability, long service life, light weight, less fraction resistance loss, etc.

The invention relates to a treatment technique of sludge produced by sewage treatment, in particular to a separated thermal cycle sludge dry method and a device thereof. The method comprises the following steps: putting wet sludge in a drying tank for drying, leading out the steam produced by drying through a fan, letting the steam enter an evaporator be condensed into water, letting the peripheral water of tubes as working fluid be subject to evaporation to generate secondary steam, compressing the secondary steam by a vapor compressor to heat, then putting the secondary steam processed by heating as an outer heating source of the drying tank in a heat transfer of the drying tank; supplying heat to sludge indirectly, letting the steam after the heat supply be condensed into water, letting the water enter the evaporator through the heat absorption of the tubes of the combustion furnace to form a closed cycle of the working fluid. According to the invention, evaporation latent heat of water and heat value of non-condensable gas are fully recycled, to that the energy consumption is minimized; and because of the isolation effect of the evaporator, the vapor compressor is separated from the products formed by anhydration of the sludge, so that the system can stably run in long-term, and the investment cost is greatly reduced.

The invention discloses an air-cooling reheating unit system arranged in a small back-pressure type steam turbine and used for driving a feed pump. Specifically, the air-cooling reheating unit system comprises a reheating system, an air cooling system, a back-pressure type pneumatic feed pump system and a heat regenerative system, wherein a steam inlet pipeline of the small back-pressure type steam turbine is connected with an exhaust steam pipeline of a steam turbine high pressure cylinder or a steam turbine ultrahigh pressure cylinder in the reheating system. An exhaust steam pipeline of the small back-pressure type steam turbine is connected with the heat regenerative system. According to the air-cooling reheating unit system arranged in the small back-pressure type steam turbine and used for driving the feed pump, steam before reheating is supplied for the small back-pressure type steam turbine to drive the feed pump and then the small back-pressure type steam turbine with the low superheat degree is utilized to pump the steam and exhaust the steam. A heater and/or a deaerator is used for heating condensation water and feedwater, the thermodynamic cycle efficiency of the system is improved and the heat exchange area of a reheater is reduced. Moreover, for a direct air cooling unit, a small steam turbine condenser and a small steam turbine indirect air cooling tower do not need to be arranged; for an indirect air cooling unit, the heat exchange area of an indirect air cooling tower of a main engine is saved.

The invention relates to the technical field of waste heat power generation, in particular to a method for improving the thermodynamic cycling quality of a waste sinter heat power generation system. The method comprises the following steps of: coupling the thermodynamic cycle of waste sinter heat power generation with the thermodynamic cycle of conventional blast furnace gas power generation, using a waste heat boiler as an external economizer of a blast furnace gas boiler; mixing saturated water generated by the waste heat boiler with hot water generated by an internal economizer of the blast furnace gas boiler and directly delivering the mixed water to a steam manifold of the blast furnace gas boiler; performing evaporation and superheating on the mixed water in the blast furnace gas boiler and allowing the mixed water to enter a steam turbine to apply work; and dividing the discharged smoke of the waste heat boiler into two parts, wherein one part is recycled as waste gas and is returned to a fan of a sinter cooler, while the other part enters the blast furnace gas boiler to support the combustion of fuels. The method utilizes the thermodynamic cycle of thermal power generation to develop the thermodynamic cycle of the waste heat power generation, solves the problems of poor stability and low thermo-electric conversion efficiency in the prior low-temperature waste sinter heat power generation system, and greatly improves the thermodynamic cycling quality of the waste heat power generation.

The invention discloses a solid rocket ramjet based on detonation combustion. The solid rocket ramjet comprises an outer shell, an inner core, an air inlet channel, an isolation section channel, a detonation combustion channel, a gas generator, a flow stabilizing ring cavity, a main fuel injection system, a rotary detonation combustion chamber, a tail spray pipe and other structures, wherein the air inlet channel, the isolation section channel and the detonation combustion channel are formed between the inner wall of the outer shell and the outer wall of the inner core; air captured by the air inlet channel is decelerated and pressurized in an isolation section and then enters the rotary detonation combustion chamber; the front portion of the inner core is of a hollow structure, the gas generator is arranged in the inner core, an oxygen-deficient solid propellant is combusted in the gas generator and forms fuel-rich gas, and the fuel-rich gas enters an expansion section of the isolation section channel through a main fuel injector, is fully mixed with fresh air and then is sprayed into the ring cavity of the rotary detonation combustion chamber; and the rotary detonation combustion chamber is provided with an ignition device, the tail spray pipe is installed at an outlet, chemical energy is converted into kinetic energy, and thrust is generated. The solid rocket ramjet has higher combustion efficiency and work performance.

The invention discloses a novel steel pipe energy pile capable of improving the utilization efficiency of shallow layer geothermal energy and a manufacturing method thereof. The device comprises steel pipe pile bodies, heat transfer tubes, heat transfer tube sleeves, an air-conditioning system, a semiconductor temperature difference power generation system and a semiconductor temperature difference power generation cooling system. The air-conditioning system comprises heat-exchange equipment. Liquid in each heat transfer tube conducts heat exchange with the soil mass at first, and then the indoor air temperature of a building can be adjusted through the upper heat-exchange equipment. Electric energy obtained by the semiconductor temperature difference power generation system and the semiconductor temperature difference power generation cooling system can supply electricity to earth surface electric equipment. The semiconductor temperature difference power generation technology is adopted in the system, and the temperature difference between the liquid in the heat transfer tubes and the soil mass is used for power generation. The electric energy generated by the temperature difference power generation cooling system can drive underground radiating tubes, the electric energy generated by the temperature difference power generation system can provide driving force for a medium and small-power water pump of the air-conditioning system, and therefore the circular flow speed of the liquid in the heat transfer tubes is increased, and heat cycle efficiency and heat exchange efficiency of the energy pile heat transfer tubes are improved.

The invention provides a thermal system of a backpressure steam extraction small turbine which is coaxial with a single reheating main turbine. A single reheating main turbine set is provided with a high-pressure cylinder, a moderate-pressure cylinder, a low-pressure cylinder and a reheating device. The thermal system of the backpressure steam extraction small turbine comprises a backpressure steam extraction small turbine, a steam inlet pipe system, a steam extraction pipe system and a heat returning device. Steam, which is to be reheated, of the single reheating main turbine is used as a steam source by the thermal system to drive the backpressure steam extraction small turbine. Steam extraction and exhausting of the backpressure steam extraction small turbine are used for heating supplied water and condensate water. The backpressure steam extraction small turbine and the single reheating main turbine are coaxially arranged. The thermal system of the backpressure steam extraction small turbine can reduce the manufacturing cost of the system and meanwhile, improve the thermodynamic cycle efficiency.

Multi-stage combustion technology combined with nitrogen-enriched air technology for controlling the combustion temperature and products to extend the maintenance and lifetime cycles of materials in contact with combustion products and to reduce pollutants while maintaining relatively high combustion and thermal cycle efficiencies. The first stage of combustion operates fuel rich where most of the heat of combustion is released by burning it with nitrogen-enriched air. Part of the energy in the combustion gases is used to perform work or to provide heat. The cooled combustion gases are reheated by additional stages of combustion until the last stage is at or near stoichiometric conditions. Additional energy is extracted from each stage to result in relatively high thermal cycle efficiency. The air is enriched with nitrogen using air separation technologies such as diffusion, permeable membrane, absorption, and cryogenics. The combustion method is applicable to many types of combustion equipment, including: boilers, burners, turbines, internal combustion engines, and many types of fuel including hydrogen and carbon-based fuels including methane and coal.

The invention discloses an air-breathing premixed carbon dioxide pneumatic laser driven by continuous rotary detonation combustion. The laser comprises an air-breathing continuous rotary detonation combustion device, a transition section, a CO2 pneumatic laser generation device and an exhaust section. The air-breathing continuous rotary detonation combustion device is used for generating a high-temperature and high-pressure fuel gas heat source serving as total energy for downstream output laser, and comprises a center body and a cylindrical shell. The center body comprises an air inlet cone part, a large cylinder part, a small cylinder part and a tail cone part which are sequentially arranged from front to back. An air inlet channel is formed by a gap between the air inlet conical part and the front-end conical shell, and a rotary detonation combustion chamber is formed by a gap between the small cylindrical part and a rear-end cylindrical shell. The laser is applied to an air-breathing aircraft, and the air-breathing continuous rotary detonation combustion device is adopted as a pumping source; the generated laser is high in efficiency, and energy is saved. The same air-breathingcontinuous rotary detonation combustion device is adopted without increasing the load, so not only can thrust be generated, but also laser can be generated.

The invention relates to a power generating system which comprises a boiler, a main steam turbine, a steam extraction heater and a generator. A steam cylinder of the main steam turbine is provided with a steam extraction opening, and steam is extracted from the steam extraction opening. Supply water of a condensate pump and feed water of a boiler feed water pump are heated through the steam extraction heater. The steam extracted from the steam extraction opening is divided into two ways, one way is connected to the steam extraction heater and used for heating the condensation water or the boiler feed water, and the other way is connected to an auxiliary steam extraction heater through a back-pressure type expansion machine. In the auxiliary steam extraction heater, the heated water is connected with a water channel outlet of a later-stage steam extraction heater closest to the main steam turbine through a water channel inlet. The water channel outlet of the auxiliary steam extraction heater is connected with the water channel inlet of a same-stage steam extraction heater. According to the power generating system, by means of the back-pressure steam turbine, more heat is converted into power, more temperature gradients are obtained through the auxiliary steam extraction heater to lower the temperature difference between the two sides of the steam water of the steam extraction heater, and therefore the whole thermodynamic cycle efficiency is higher.

The invention relates to an air-cooled steam condensing system with natural ventilation and direct water film evaporation, which comprises a natural ventilation cooling tower and a direct water film evaporation type air-cooled cluster steam condenser arranged above the water pool of the cooling tower. Waste steam from a steam turbine flows through the tube of the steam condenser to release heat so as to be condensed into water to be discharged; and spray water forms a water film outside of the tube, flowing air sweeps the water film, and the water film absorbs the heat of the waste steam in the tube and transmit sensible heat and the latent heat generated in the evaporation of the water film to the flowing air. The spray water then falls into the water pool of the cooling tower, and is delivered to a spray water distribution device above each tube bundle of the steam condenser by a circulating pump. The system consumes a certain amount of evaporated water, thereby significantly improving the heat cycling efficiency. No fan is applied to consume power, thereby reducing the service power. Moreover, the system can overcome the defect that the direct dry-air-cooled steam condensation can not be completed and realized in the high-temperature environment. Compared with the water-cooled steam condensation, the system can obtain a steam condensation temperature lower than the water-cooled steam condensation, achieve higher heat cycling efficiency, and significantly reduce water consumption. Therefore, the system is applicable to areas with abundant water resources but stricter and stricter water-saving requirements.

A steam reheat process is provided to enhance a thermal power cycle, and particularly a renewable steam thermal cycle. An oxyfuel combustion gas generator is provided which combusts a hydrogen and/or carbon containing fuel with an oxidizer of primarily oxygen to generate products of combustion including steam and/or carbon dioxide. Water from the thermal cycle is directed to the reheater for mixing with the products of combustion within the reheater to generate a working fluid containing steam. This steam is routed through a turbine or other expander and power is outputted from the system. The water is optionally thereafter condensed and at least partially routed back to the thermal cycle. Any carbon dioxide within the working fluid can be separated in a condenser downstream of the expander for capture of the carbon dioxide, such that increased power output for the thermal power cycle is achieved without atmospheric emissions.

The invention relates to an electric heating type rapid heat cycle molding injection mold. The mold comprises a core plate and a cavity plate, wherein the core plate and the cavity plate are respectively connected with support plates; the support plates are characterized by connecting a plurality of ordinary steel plates with poor heat-conducting properties in a criss-cross manner to form a latticed structure; part of meshes in closed holes formed by matching the support plates with the core plate and the cavity plate are preferably selected and heating elements are installed inside the meshes by utilizing special heat insulation devices to achieve rapid heating of the molding surface of the mold; the cavity plate is formed by a molding layer and a base layer; the base layer is prepared with ordinary hot work mold steel by adopting a conventional process; the molding layer is prepared by superposing high-quality mold steel with good heat fatigue resistance and terrific polishing property on the surface of the base layer by adopting an overlay welding method; cooling pipelines are arranged on the core plate and the base layer of the cavity plate to achieve rapid cooling of the molding surface of the mold. The electric heating type rapid heat cycle molding injection mold has the beneficial effect that innovative designs of the material, the structure, and the like are put forward.

The invention discloses a thermal power plant combined heat system and a thermal power plant. The thermal power plant comprises a primary reheat condensing steam unit and a backpressure unit; and the combined heat system comprises a heat system of the primary reheat condensing steam unit and a heat system of the backpressure unit, wherein the heat system of the primary reheat condensing steam unit and the heat system of the backpressure unit share a heat recovery system from a condenser to a deaerator; condensation water of the primary reheat condensing steam unit and the supplement demineralized water of the backpressure unit are divided into two paths through the shared heat recovery system; and one path enters the primary reheat condensing steam unit, and the other path enters the backpressure unit. According to the combined heat system, the requirements of industrial high capacity and high parameter heat supply can be simultaneously met, the thermal cycle efficiency is greatly improved, the fuel consumption is reduced, and the pollutant discharge is reduced; and meanwhile, the power plant investment can be greatly reduced.

The invention provides a piston ram self-ignition pulse-jet engine. A stepped free piston is mounted in an engine bod, and a pre-combustion chamber and a main combustion chamber are formed. The front end of the main combustion chamber is provided with a spout provided with a pressure control switch; a fuel pipe on one side and a low-pressure gas pipe are both communicated with the pre-combustion chamber and the main combustion chamber through air inlets; the inner front end of a cylinder block is provided with a vent way. The cylinder block is divided into the two combustion chambers, ignition is achieved by gas pressure, mechanical means or a spark plug, the pre-combustion chamber is controlled to combust first by one or any of the means such as photoelectricity and electromagnetic wave, the main combustion chamber is blast through the free piston, high-temperature high-pressure gas is formed and thrusts the spout open, thrust is generated, and no power turbine is required. The piston ram self-ignition pulse-jet engine can be switched to a rocket operation mode and is a dual-mode efficient engine ideal for aerospace, aviation, rockets and the like. Multiple fuels are available to the piston ram self-ignition pulse-jet engine, the structure is simplified, and the piston ram self-ignition pulse-jet engine can be combined with the existing engine to form novel engines.