158results about How to "Improve cycle thermal efficiency" patented technology

The invention discloses a rotary knocking gas turbine. The rotary knocking gas turbine comprises a gas inlet passage, a diffusion section and a gas storage chamber which are connected in sequence from left to right, wherein a gas compressor is arranged at the downstream of the gas inlet passage; a rotary knocking combustion chamber is positioned at the right end of the gas storage chamber, the right end of the rotary knocking combustion chamber is connected with a mixing chamber, a turbine and an exhaust pipe in sequence, a plurality of nozzles are annularly arranged on the left end face of the rotary knocking combustion chamber at equal intervals, and six ignition plugs are uniformly arranged on the circumference of the rotary knocking combustion chamber; an air passage and a combustion passage are arranged on each nozzle, the gas storage chamber is communicated with the rotary knocking combustion chamber through a gas supply passage and the air passages of the nozzles, and the mixing chamber is communicated with the gas storage chamber through a gas escape bypass; a rotor is arranged between the gas compressor and the turbine, the gas compressor of a rotating component of the gas turbine and the turbine are connected with a casing of a static bearing component of the gas turbine through two bearings, and one end of the rotor is led out from the gas exhaust pipe. When the rotary knocking gas turbine is used, the leading-out end of the rotor is connected with a generator assembly through a speed changer.

The invention discloses an indirect air cooling method and a system with the working fluid of parallel-connected obverse and inverse refrigeration cycles. Based on the phase transition in the working fluid cooling process, a double-phase transition heat exchanger and a single-phase transition heat exchanger are respectively coupled with an obverse refrigeration cycle and an inverse refrigeration cycle which are connected in parallel; the saturated gaseous refrigerant from the phase-transition heat exchangers is compressed, boosted and then sent to an air-cooled radiator for exothermic condensation, then the condensed refrigerant enters a liquid storage tank and is decompressed through a throttle valve and sent to the phase-transition heat exchangers so as to complete the obverse refrigeration cycle; or the saturated gaseous refrigerant from the phase-transition heat exchangers is throttled and decompressed through a thermal expansion valve and then sent to the air-cooled radiator and the liquid storage tank, pressurized by a booster pump and finally sent back to the phase-transition heat exchangers so as to complete the inverse refrigeration cycle. The method and the system can be widely applied to the cooling systems of the condensers in thermal power, nuclear power and other turbine-generator units or the cooling systems of the intercoolers in petroleum, chemical and other industries to reduce energy consumption, save investments, as well as improve water-saving rate and the adaptability of the cooling system to the environment; therefore, the method and the system are provided with promotional values and can produce larger social environmental benefits and economic benefits after implementation.

The invention discloses a generating set optimization control method for correcting sliding pressure operation curve by adopting steam consumption rate, which comprises the detailed steps of: confirming the throttling coefficients and minimum pressure of a steam turbine under a designed working condition according to the load command of the generating set and confirming the main steam pressure set value; confirming the parameters of dynamic compensation section according to the main steam pressure response characteristics; respectively calculating the steam consumption rate of the generating set under the designed working condition and the actual working condition, working out the steam consumption rate correction coefficients, and implementing online correction on the load command of the generating set; using the corrected load command to divide the throttling coefficients of the steam turbine, then implementing calculation on the dynamic compensation procedure and minimum pressure limitation, and finally obtaining the best main steam pressure set value of the generating set under the current operation condition. The best main steam pressure set value is applied in a cooperation control system of a unit set so as to realize the best cooperation relation between the inlet steam pressure and inlet steam flow of the generating set, thus reducing the throttling loss of the steam turbine and guaranteeing the best thermoeconomic performance of the generating set.

A low carbon emissions, combined cycle power plant utilizes vortex nozzles (38) operative at cryogenic temperatures to separate out carbon dioxide (39) from the flue gases. Complexity of the plant is minimized by operating a gas turbine engine component (10) of the plant at a turbine exhaust pressure of at least 2 bar, so that downstream components of the plant, including a heat recovery steam generator (19A), a gas cooling system (30, 33, 36), and the inlets of the vortex nozzles, all operate at the same pressure of at least two bar. To increase carbon dioxide concentration in the flue gases (37) that pass through the vortex nozzles (38), and thereby increase efficiency of carbon dioxide removal from the flue gases, up to 50% of the flue gases that exit the heat recovery steam generator (19A) may be recirculated to a location (L, FIG. 4)) in the compressor of the gas turbine engine where the pressure of the compressor air matches the flue gas pressure.

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 invention discloses a pressurized water reactor and high-temperature gas cooled reactor-based hybrid thermodynamic cycle system, which belongs to the technical field of nuclear power energy. The hybrid thermodynamic cycle system comprises a steam generator, a steam turbine, a moisture separator re-heater, a condenser, a condensate pump, a gland steam condenser, low-pressure heaters, a deaerator, a water-feeding pump and high-pressure heaters which are connected according to a thermodynamic cycle process. Steam super-heater pressure shells of two modular high-temperature gas cooled reactors connected in parallel are connected between the steam generator and a high-pressure cylinder in a secondary circuit of a pressurized water reactor nuclear power station. Saturated steam generated by the steam generator performs heat exchange with high-temperature helium in steam super-heaters, and superheated steam flows out of the steam super-heaters and is converged to enter the high-pressure cylinder for working. Therefore, the system is favorable for greatly improving the cycle thermal efficiency of the two loops of the conventional pressurized water reactor, can improve the running security of the steam turbine, and has high economic benefit.

The invention discloses application of a second type absorption type heat pump in a heat exchange system of a power plant. The key improvement is that a drive steam inlet of a generator is connected with a first stage steam extraction pipe arranged on a low pressure cylinder of a steam turbine through a pipeline, and a condensate water outlet is connected with a condensate water pipe returning to a boiler through a pipeline; a cooling water inlet of an absorber is connected with the condensate water pipe returning the boiler through a pipeline, and a cooling water outlet is connected with the condensate water pipe returning the boiler through a pipeline; a cooling water inlet of a condensator is connected with a cooling water inlet of a condensor through a pipeline, and a cooling water outlet of the condensator is connected with a cooling water outlet of the condensor through a pipeline; a cooled steam inlet of an evaporator is connected with the first stage steam extraction pipe arranged on the low pressure cylinder of the steam turbine through a pipeline, and a condensed water outlet of the evaporator is connected with the condensate water pipe returning the boiler through a pipeline. The invention has the advantages that the second type absorption type heat pump can reduce the amount of extracting middle-high pressure steam, enhance the energy conversion efficiency and save the resources.

The invention discloses a power station air cooling system adopting combined refrigeration with shaft seal steam leakage of a steam turbine and continuous blow-down waste heat of a boiler. The system is characterized in that the steam turbine is communicated with a steam source, the steam turbine is connected with an electric generator, and the steam turbine is sequentially communicated with an air-cooling condenser, a condensate pump and boiler feedwater; the steam turbine is sequentially communicated with a steam leakage condenser, a steam leakage condensate pump and the boiler feedwater; boiler blow-down water is sequentially communicated with a flash tank, a deaerator, a working medium superheater and a drainage ditch; the steam leakage condenser is sequentially communicated with the working medium superheater, and a generator is communicated with the steam leakage condenser through a working medium circulating pump; the generator is sequentially communicated with a condenser, a first throttling valve and an evaporator, the evaporator is communicated with an absorber, and the generator is sequentially communicated with a second throttling valve, the absorber, a solution pump and a generator; and air is sequentially communicated with the evaporator, an induced draft fan and the air-cooling condenser. A method for predicting a heat-transfer coefficient of the air-cooling condenser is further provided.

The invention relates to a combined cooling, heating and power device of a distributed type industrial boiler. A steam Rankine cycle system positive pressure and closed type method is adopted, a condenser of an outlet steam exhaust of a steam turbine serves as heat sources for a heating plant and an absorption refrigeration device, and therefore gradient utilization of energy sources is achieved. High quality energy of fuel is recovered for generating electricity, more than 260 KWh electric quantity can be recovered from per ton evaporation capacity (or 0.7MW heating load), at the same time, cooling and heating combination is achieved, and exhaust gas waste heat can be effectively recovered. According to a steam Rankine cycle system, waste acid and waste alkali are not produced, and the problems of oxygen corrosion and scale formation of the boiler are effectively avoided. Therefore the distributed type industrial boiler is energy-saving, environment-friendly and very remarkable in social benefits.

The invention relates to a distributed pneumatic-Rankine combined cycle combined cooling heating and power device. The distributed pneumatic-Rankine combined cycle combined cooling heating and power device is characterized in that the exhaust of a pneumatic machine is adopted as a heat source of a Rankine cycle waste heat boiler, a steam Rankine cycle system adopts a positive pressure and close type operating mode, a condenser of outlet dead steam of a steam turbine is utilized as a heat source of a heating system and an absorption refrigeration machine, and the cascading use of an energy source is realized; and high grade energy of a recycled fuel is used for generating electricity, evaporative capacity (or the heating load of 0.7 MW) of per ton can recover electric quantity which is more than 340 degrees, meanwhile, the cooling heating combination is realized, and the waste heat of fume is recovered in a high efficiency manner. A water treatment system of the steam Rankine cycle system causes no or only a little of waste acid and waste caustic to generate, and an oxygen corrosion and scaling problem of the boiler is effectively avoided. Therefore, energy conservation, environmental friendliness and social benefits are very notable.

The invention provides a very-high-pressure intercooling cycle turbofan engine. The engine comprises fans, a high-pressure air compressor, an intercooler, a very-high-pressure air compressor, a combustion chamber, a circular rotating fan transition section, a very-high-pressure turbine, a high-pressure turbine, a low-pressure turbine, a low-pressure shaft, a high-pressure shaft and a very-high-pressure shaft. The fans, the high-pressure air compressor, the intercooler, the very-high-pressure air compressor, the combustion chamber, the circular rotating fan transition section, the very-high-pressure turbine, the high-pressure turbine and the low-pressure turbine are connected in sequence. The very-high-pressure turbine drives the very-high-pressure air compressor to operate through the very-high-pressure shaft. The high-pressure turbine drives the high-pressure air compressor to operate through the high-pressure shaft. The low-pressure turbine drives the fans to operate through the low-pressure shaft. The rotation central axis of the very-high-pressure air compressor, and the axis of the combustion chamber are both parallel to the axis of the engine but not coincide with the axis ofthe engine. The high-pressure air compressor is composed of a multi-stage high-load axial flow air compressor and a single-stage high-through-flow centrifugal/oblique flow air compressor.

The invention relates to a central air conditioner combining solar energy ejecting cooling device. The device comprises a main ejector, a pressure adjustment ejector, a preheating ejector, an evaporator, a condenser, a compressor, a throttle valve, a generator, a heat collector, a regulating valve, a freezing medium pump and the like. The system is characterized in that mechanical compressor type cooling is assisted by solar energy ejecting cooling so that the purpose of energy saving is achieved; the two cooling methods share the evaporator and the condenser so that system cost is effectively saved; pressure of driving fluid of the main ejector can be adjusted through the pressure adjustment ejector so that when solar energy radiation waves, the main ejector is still steady in a working condition and efficient in operation; and the preheating ejector is arranged between the generator and the freezing medium pump and lower temperature liquid freezing medium cycle fluid is heated by a gas freezing medium with higher temperature in an outlet of the compressor, namely, waste heat generated by a central air conditioner can be recycled so that energy using rate of the system can be improved.

The invention discloses a solar ORC power generation system and a power generation method of the solar ORC power generation system. Solar energy can be utilized to generate power, and therefore the heat energy utilization rate is high. The solar ORC power generation system mainly comprises a heat exchanger which is connected with a solar heat source, a power output device, a generator which is connected with the power output device, a circulating pump and a condenser. The solar heat source comprises solar heat collecting panels, an oil storage tank and a conduction oil circulating pump. The solar heat source further is further provided with a heat regenerator. The heat regenerator is used for conducting heat exchange on an organic working medium discharged by the power output device and an organic working medium discharged by an organic working medium circulating pump, and therefore remaining heat energy of the organic working medium discharged by the power output device can be fully utilized. The solar ORC power generation system is used for power generation, therefore, heat energy can be effectively utilized, energy saving is facilitated, and system device cost is reduced.

The invention discloses an absorption type heat regenerator and application thereof in a regenerative cycling system of a power plant. The key improvement of the absorption type heat regenerator is as follows: the absorption type heat regenerator comprises a generator, an absorber, an expansion mechanism and a working medium pump. The steam inlet of the generator of the absorption type heat regenerator is connected with the steam pumping pipe of a steam turbine through a pipeline, the condensate outlet of the generator of the absorption type heat regenerator is connected with the return condensate pipeline of a boiler through a pipeline, the steam generation outlet of the generator is connected with the steam exhaust pipe of the steam turbine through a pipeline; and the steam absorption inlet of the absorber is connected with the steam pumping pipe of the steam turbine through a pipeline, the cooling water inlet of the absorber is connected with a condensate pipe, and the cooling water outlet of the absorber is also connected with a condensate pipe. The absorption type heat regenerator has the advantages of reducing the number of regenerative cycles for pumping of high-pressure steam, improving the energy conversion efficiency and generation power, saving the energy, and reducing emissions.

The invention relates to the field of speed regulation of a power station fan and a water pump unit, in particular to a high-efficiency steam-electricity hybrid power speed regulation unit. The unit includes a steam turbine, a gear box, a synchronous automatic clutch, a motor, a full-power frequency converter, a load, a planetary hydraulic speed regulation/constant speed device, and a planetary variable frequency speed regulation/constant speed device. Through the different arrangements and applications of the device, the hybrid power speed regulation driving unit is realized, the unit integrates the advantages of the steam-driving and electricity-driving parties, has the characteristics of being energy-saving, efficient, high in reliability, saving in investment, and is particularly suitable for actual conditions of peak shaving and future deep peak shaving operation of a current power station.

The invention relates to a closed circulating system suitable for an aerospace engine. Supercritical state fluid serves as a working medium, and the characteristics that the supercritical state fluid is large in heat capacity, extremely high in heat exchange efficiency, quick in response and low in viscosity are fully utilized so that the whole circulating system can be high in energy transmission capacity and small in flow resistance and can well adapt to changes of working conditions. The system can fully use heat released by cooling of high-temperature inflow air, and comprehensive management of engine energy can be achieved. The closed circulating system is used for the aerospace engine and can overcome defects of an existing engine precooling scheme so that the engine can meet the requirements of a hypersonic aircraft and a single-stage-to-orbit aircraft which can be repeatedly used.

The invention discloses a gasoline engine EGR stratified charge system based on a flow guiding plate, and belongs to the technical field of engines. An exhaust pipe is fixedly connected with an intake manifold through a bypass pipe, an EGR valve, an EGR cooler and an EGR loop. An airflow cavity in the air inlet side of a cylinder cover part is respectively and correspondingly connected with an airflow cavity of an air inlet diverting cavity part, an air inlet of the cylinder cover part corresponds to branch pipes of the air inlet diverting cavity part, a throttle valve is fixedly connected with an intake manifold hole through the intake manifold, and the exhaust branch pipes of the exhaust pipe are correspondingly connected with four exhaust ways of the cylinder cover part respectively. Waste gas and fresh air can be prevented from being early mixed outside a combustion chamber and can also be prevented from being accumulated and mixed when an air inlet door is closed, the equipressure air intake of the fresh air and the pressure can be achieved, the mixed degree of the fresh air and the waste gas can be reduced, the load control of an engine can be achieved, the circulation thermal efficiency of a gasoline engine is improved, high EGR efficiency can be achieved, and the combustion economical efficiency of the gasoline engine is effectively improved.

The invention relates to a Rankine cycle system and a fluid working medium material construction method thereof. The method comprises the steps of selecting out genes with high fluid working medium safety contribution values and low pollution contribution values to establish a gene database; determining a boundary condition of a thermal power generation circulation system and a thermophysical parameter range of a required fluid working medium material, screening out various genes in the gene database, performing combination and replacement on the genes, and forming a compound fluid working medium, wherein various thermophysical parameter values of a compound constructed by the selected genes are higher than or equal to those of CO2; determining a target function of the thermal power generation circulation system; calculating the thermophysical parameters of the compound fluid working medium, and selecting out the compound fluid working medium which meets the target function of the thermal power generation circulation system; and performing chemical synthesis feasibility verification on the compound fluid working medium, and applying the compound fluid working medium which passes the verification to the thermal power generation circulation system engineering. The system and the method can be widely applied to the thermal power generation circulation system.

The invention relates to a multifunctional cascaded steam Rankine combined cycle power generation device. A multistage cascaded mode including a high-voltage end Rankine cycle, a middle-voltage end Rankine cycle and a low-voltage end Rankine cycle is adopted, discharged latent heat of vaporization during the vapor condensation of the high-voltage end Rankine cycle and the middle-voltage end Rankine cycle is recycled efficiently and is used for electricity generating of a Rankine cycle system, load of a condenser of a traditional steam Rankine cycle system is efficiently reduced over an absolute value of 20 percent, the system optimization technology is adopted, and the cycled absolute heating efficiency of the whole system can be improved by over 5 percent. The multifunctional cascaded steam Rankine combined cycle power generation device can be used for energy conservation transformation of an existing reheat cycle steam Rankine cycle unit and can also be used for the design and construction of a new-built unit, and the economic benefit, social benefit and environmental protection benefit are remarkable.

The invention discloses a mixture working medium supercritical Brayton cycle photo-thermal power generation system and a power generation method. The system comprises a photo-thermal heat source inputsubsystem and a supercritical CO2 and SF6 mixture working medium power cycle power generation subsystem. According to the system and the method, a supercritical CO2 and SF6 mixture is taken as a working medium, and when the temperature of the working medium at an inlet of a main compressor in the photo-thermal power generation system deviates from the supercritical CO2 critical temperature greatly, the power generation efficiency of the photo-thermal power generation system can be improved remarkably. Besides, in the operation process of a cycle system, the flow of the working medium enteringa particle-sCO2 heat exchanger is adjusted through a flow division control valve, the problem about control of the particle-sCO2 heat exchanger in the system on the temperature of the working mediumat a turbine inlet can be effectively solved, and the operation efficiency and the peak regulation flexibility of the whole photo-thermal power generation system are improved remarkably.

The invention provides a steam turbine cycle which comprises a high pressure turbine (1), a reheat turbine (24), a boiler (4), a water supply heater (6) for heating supply water to the boiler (4) with extraction steam from the turbines (1, 24), a water supply pump (12), and a condenser (10), and which is a single-stage reheat cycle where the working fluid is water and Rankine cycle as a regenerative cycle. Steam temperature at the outlet of the boiler (4) is 590 degree centigrade or above. The cycle is constituted such that the temperature rise ratio between supply water temperature rise at a first supply water heater (7) corresponding to extraction steam (high pressure turbine exhaust gas extraction steam) (22) from exhaust gas of the high pressure turbine (1) and an average of supply water temperature rises at a second supply water heater (8) where the pressure of supply water is lower than that of first supply water heater (7) falls within a range of 1.9-3.5.