50 results about "Exergy" patented technology

The present invention is directed to an apparatus for more efficient exergy and power usage in data centers. Denominated FRAME (standing for “Forced Recuperation, Aggregation & Movement of Exergy”), the apparatus is a power production and exergy management system (exergy being energy available to do useful work, as opposed to energy, which can be changed to a form, usually heat, rendering it unavailable). The apparatus integrates generally isothermal operation with phase-change and single-phase liquid cooling having variable operating temperatures and pressures, aided by a dynamically reconfigurable “thermal bus” comprising multi-fluid thermal fluid transport channels, virtual plumbing, and associated support devices. The apparatus minimizes exergy use through efficient operation and by recuperating and aggregating useful exergy that may then be dynamically repurposed to meet energy or power needs that would otherwise have to be met via external means.

The invention relates to the field of advanced manufacture and automation, in particular to a low-temperature heat real-time optimization system based on the general algorithm sequential quadratic programming (GA-SQP) mixed optimization strategy, which comprises a real-time data base, a low-temperature heat system soft measurement module, an energy consumption optimization module, a user interface and a real-time information issuing module based on Flash. Compared with the prior art, the low-temperature heat real-time optimization system has the advantages that the flow process simulation technology and the exergy economics are used as the basis for building a low-temperature heat system simulation and optimization model, a mixed solving strategy of combining the classical mathematical programming sequence secondary planning SQP and the novel group intelligent optimization algorithm GA is adopted for solving the nonlinear optimization model, and the real-time data base technology is used for collecting real-time information in the production process, so the real-time monitoring, the off-line emulation, the on-line simulation and the real-time optimization are realized.

The invention belongs to the technical field of thermoelectricity, and relates to an extraction condensing heat supply system additionally provided with a non-reheat medium-pressure steam turbine. A part of steam is separated from a steam exhaust port of a high-pressure cylinder of a main steam turbine to enter the added non-reheat medium-pressure steam turbine, and the rest of steam enters a reheater of a boiler and a No.II high-pressure heater; the steam entering the medium-pressure steam turbine does not need to be reheated, an independent generator II is driven, four-stage extraction steam of the medium-pressure steam turbine serves as a heat source for a No.III high-pressure heater, a No.V low-pressure heater, a No.VI low-pressure heater and a deaerator to replace a part of regenerative extraction steam of the main steam turbine, and the extraction steam of the medium-pressure steam turbine is discharged into a heater for heating network to heat heating network water. An effect of additionally installing the medium-pressure steam turbine in the extraction condensing heat supply system disclosed by the invention is to reduce heat exchange exergy loss by reducing heat exchange temperature difference of a part of regenerative heaters and the deaerator; work capability of heat supply steam flow is increased, and therefore heat loss of a high-capacity heat supply unit is caused by a high extraction steam parameter is reduced; and the extraction condensing heat supply system disclosed by the invention is suitable for heat supply and energy conservation transformation on 300 MW (megawatt), 600 MW and above steam turbine units.

The closed-type combined cooling and power energy storage system provided by the present invention includes: an energy storage unit, a heat recovery unit and an energy release unit, the energy storage unit includes an air bag, a compressor unit, and an air storage tank; the heat recovery unit includes All levels of compressor interstage coolers, cold oil tanks, hot oil tanks, and turboexpander interstage regenerators at all levels; the energy release unit includes speed control valves, turboexpander units, reducers, generators, grid-connected Control cabinet and cold air air conditioner, the whole system is a closed cycle system, which does not require external air supply, which reduces the process of air drying and purification, equipment investment and energy consumption, and simultaneously outputs cooling capacity to the outside, making full use of the cooling capacity of the exhausted air after expansion. Exergy realizes combined cooling and power supply, improves the efficiency of the system, and realizes the conversion of unstable and intermittent wind energy into stable electrical energy and cooling output.

The invention discloses a water spraying cooling system of a piston reciprocating internal combustion engine. The water spraying cooling system has the advantages that the structure and working process of an engine, the features of combustion of hybrid gas in an engine cylinder are utilized, and physical change after in-cylinder mixing after water is accurately sprayed to an inner pump of the engine cylinder in a constant-region, fixed-time, quantitative and constant-speed manner; aiming at temperature environments generating pollutants such as NO, HC and CO and a target of basically causing no 'exergy' value (acting capacity) loss of fuel in the engine cylinder, water spraying technological means and the evaluation concept of adopted water spraying parameters are determined, the system is operated under the newly-defined constant-region, fixed-time, quantitative and constant-speed working parameters, generation of various inefficiency combustion pollutants in the engine cylinder is eliminated, and about 30% of fuel heat efficiency loss caused by the existing cooling manners is avoided.

The invention discloses a method for constructing a heat exchange network based on exergy consumption cost. The method comprises the following steps of: 1) extracting logistics data, drawing a balanced composite curve on a temperature enthalpy graph, dividing an enthalpy interval, constructing a super-structural model of the heat exchange network, optimizing matched structures among fluids of all sub-enthalpy intervals by using minimized investment cost as a target function, and solving a heat load and an area allocation matrix; 2) solving heat transfer exergy loss among all enthalpy intervals by a sectional integration method in reference to the formula (1), and calculating flow exergy loss of a matched unit in reference to the formula (2); and 3) solving the optimal heat transfer temperature difference of the heat exchange network and a corresponding network structure by using minimized annual total cost as the target function in reference to the formula (3). In the invention, the method for constructing the heat exchange network based on the exergy consumption cost, which is high in reliability and solving efficiency, is provided.

The invention discloses an LNG power ship fuel cold energy comprehensive utilization method and further discloses a system achieving the LNG power ship fuel cold energy comprehensive utilization method. Firstly, the cold energy of deep cooling LNG fuel is converted into electric energy through Rankine cycle power generation; and secondly, the cold energy of intercooling LNG fuel is recycled by a refrigerant and is applied to each refrigeration demand unit of a power ship grade by grade for cooling, so that the temperature of the liquid low-temperature LNG fuel is raised to a temperature required by power ship air intaking. The LNG power ship fuel cold energy comprehensive utilization method and the system have the advantages that the cold energy of LNG fuel fed to a main engine of a ship is first used in ship power generation, low-temperature cold storage, seawater desalination, high-temperature cold storage, air conditioning and the like grade by grade and then the temperature of theLNG fuel reaches the temperature required by air intaking of the main engine, and the LNG is fed to the main engine for combustion; and the cold energy of the LNG fuel is reasonably utilized grade bygrade, so that the cold energy and cold exergy (imgfile =' DDA 0001765784070000011. TIF 'WI =' 45' he =' 51' /) comprehensive utilization efficiency can be improved, and the operating cost of the shipis reduced. The cold energy of the limited LNG fuel can be reasonably distributed and utilized to a great extent on different types of ships through corresponding adjustment according to refrigeration requirements of the different types of ships and working conditions under different space-time conditions.

A cold energy power generation system increases the efficiency in utilizing the cold exergy of liquefied gas while freely controlling the gas supply pressure on the outlet side of a secondary expansion turbine. The system includes a pressure-increasing pump for increasing the pressure of a low-temperature liquefied gas to a pre-overboost pressure while maintaining the liquid gas in a liquid state, a Rankine-cycle-type primary power generation apparatus, a heater for heating a vaporized gas, and a direct-expansion-type secondary power generation apparatus. Since the cold exergy of the liquefied gas is more efficiently utilized as pressure exergy than as temperature exergy, the system converts the cold exergy more preferentially to pressure exergy, and the optimal operating conditions that maximize the conversion efficiency can be determined by the composition of the liquefied gas, the temperature of the heating source, and the gas supply pressure.

The invention discloses a method for measuring a dry-quenching burning loss rate based on an exergy balance. The method comprises the following steps of: establishing an exergy balance model for a dry-quenching burning system after analyzing a dry quenching process, operating situations and related factors for affecting the dry-quenching burning loss rate; and obtaining a relationship between the dry-quenching burning loss rate and a steam yield through the analysis of the exergy balance model. According to the method disclosed by the invention, the dry-quenching burning loss rate can be simply, conveniently, effectively and quickly calculated out by using the relationship; and besides, the method has important meanings for reducing the dry quenching production cost and improving the dry quenching yield and efficiency.

The invention relates to a comprehensive energy system of electric, cold and thermal multi-terminal requirements, and particularly to a comprehensive-energy-system optimization method based on doubleconstraint conditions of optimal environment emission and thermal-exergy utilization. The method is based on constituent elements of a cold, thermal electric triple-supply system of fired gas, a fired-gas boiler, an electric refrigerator and a photovoltaic+energy storing system of the comprehensive energy system, all types of market values of greenhouse-gas (carbon) emission, benefits of environment tax saving, a green certificate of renewable energy and energy use right of a highly efficient fired-gas energy station are all standardized as comparable prices through a carbon emission accounting method based on terminal consumption and other methods according to all the elements of the system; and a system ratio interval of optimal thermal-exergy utilization is obtained by initial derivation, and then ratio composition of all subsystems of the comprehensive energy system corresponding to a smallest total amount of greenhouse-gas and pollutant emission is finally selected through simulation, measurement, calculation and verification on total amounts of greenhouse-gas and pollutant discharge. The method has the advantage of realizing system matching degree optimization for features ofcleanness and high efficiency of the comprehensive energy system.

The invention relates to a crude oil pipeline transportation exergy consumption evaluation system analysis method based on analytic hierarchy process. The analysis method comprises: first, exergy analysis of the process of crude oil pipeline transportation is carried out, crude oil pipeline exergy consumption evaluation system Hierarchical structure model is established according to the analysis index; according to crude oil pipeline exergy consumption evaluation system Hierarchical structure model, the judgment matrix of each index at different levels is constructed by 1 - 9 scale method, andthe weight of each index at different levels is calculated by root-square method according to the matrix of each level, and the eigenvector of the largest eigenvalue is normalized when being processed; consistency of judgment matrix is judged, if relevant indexes meet that requirement, the consistency of judgment matrix is accepted, and according to the index weight of each hierarchical structure, the influence degree of the low layer to the upper layer is obtained; 4. Combining the production data of the pipeline, the energy efficiency of the crude oil pipeline transportation process is evaluated; the energy consumption coefficient of pipeline crude oil is Calculated. The system of the invention judges the energy-saving potential and the improvement direction of the energy consumption.

The invention discloses an air compression method and system with a self-precooling function. According to the method, air is compressed by multi-stage compression and interstage cooling, a cooling medium is used for recycling interstage compression heat and exergy, the recycled heat is used as a heat source, and cooling capacity is generated by an absorption refrigeration method and is used for precooling to-be-compressed air before each stage. The system mainly comprises three parts, i.e., a compressor unit gas circuit subsystem, a compressor unit water route subsystem and an absorption refrigeration machine subsystem. The air compression method and system are particularly suitable for being used in summer or high temperature environment; when the air is compressed by the air compression method and system, the gas production rate of the compressed air can be ensured, the moisture content of the compressed air is reduced, the pressure ratio of a compressor in each stage is increased, and power consumption in the compression process of each stage is obviously reduced; besides, the interstage compression heat and exergy of all the stages are fully utilized, and the energy usage ratio of the system is further improved.

The invention discloses a dual-working condition heat pump cold hot water machine unit of a parallel evaporator. The machine unit compresses a circulation loop consisting of a compressor, a condenser, an evaporator and a throttle valve, wherein the evaporator comprises a first evaporator and a second evaporator that are connected with the compressor and the condenser in parallel; the throttle valve comprises a first throttle valve and a second throttle valve, the first throttle valve is arranged between the first evaporator and the second evaporator, the second throttle valve is arranged between the second evaporator and the condenser, and the circulation loop is controlled by the first and the second throttle valves. As the two evaporators are connected in parallel and the flow rate and pressure of the two evaporators are controlled and regulated by the throttle valves between the evaporators to realize the supply of refrigerating water with different temperatures, the machine unit has the advantages of effectively improving the stability of exergy loss coefficient, realizing the simplification of a pipeline system and simultaneously being applicable to an individual independent cold hot source system.

The invention discloses a biomass boiler and industrial waste heat combined heating technology. Exergy wasted in the heating and heat exchanging process of high temperature steam generated by a biomass energy boiler is utilized, the running mode of independent heating of the biomass boiler is changed, biomass steam is used for driving a two-stage absorbing type heat pump, the industrial waste heatgrade is improved and is used for heating, the electric energy of an electric driving compression type heat pump is saved, and the energy consumption during industrial waste heat grade improvement isreduced. The steam generated by the biomass boiler is utilized as a driving heat source, the two-stage absorbing type heat pump is driven, parallel connection is adopted on the steam side, parallel connection is adopted on the industrial waste heat side, and serial connection is adopted on the heating pipe net side. By means of a flue gas waste heat recycling device, two or more heat exchangers are connected in series, and the flue gas waste heat is subjected to ladder utilizing. According to the heating temperature requirement condition, flue gas waste heat is utilized for firstly heating heating return water and then heating industrial waste heat return water. By means of automatic control system monitoring, automatic control switching, automatic recognizing and temperature monitoring,flue gas waste heat is applied at the position lower than a flue gas waste heat recycling and condensing point.

The invention relates to a phase change heat storage device, a solar heat utilization system employing the same and an operating mode of the solar heat utilization system, and provides a heat storage device with good heat storage property and high exergy, and the heat storage device is applied to a solar heat utilization system. The heat storage device adopts a plurality of serially connected independent heat storage units to realize temperature gradient heat storage and utilizes latent heat of a heat storage medium during heat storage to improve the heat storage effect and the heat utilization ratio, is simple in structure and allows the heat storage units to be flexibly adjusted as required. According to the invention, the heat storage device is also applied to the solar heat utilization system, latent heat and sensible heat storage capability of the heat storage medium are fully utilized, the required amount of the heat storage medium is reduced, the structure is simplified and the solar exergy is improved.

The invention belongs to the technical field of power station energy conservation and discloses a comprehensive waste heat utilization system for deep optimization of the primary air preheating process. A front air preheater is adopted for the system to preheat primary air and secondary air; a dimidiate-bin rotating type air preheater is adopted for a secondary air preheater of a main flue to further heat secondary air; primary air is gradually heated to the needed temperature of an inlet of a coal mill through the front air prehater, a primary steam primary air preheater and a secondary steam primary air preheater; and a supplied water heater and a condensed water heater in a bypass flue are arranged in series and used for heating supplied water and condensed water. According to the system, primary air and secondary air are independently preheated, primary air is heated through low-temperature flue gas and extracted steam from a turbine in a grading manner; and exergy losses caused by cold and hot primary air mixing are avoided. Meanwhile, high-grade flue gas heat is displaced, supplied water and condensed water are heated, secondary air is heated in a grading manner through the front air preheater and the dimidiate-bin air preheater, deep energy conservation and consumption reduction of a coal-fired generating unit are fully achieved, and economic benefits are remarkable.

The invention provides a novel efficient water supply heat recovery system for a secondary reheating unit, and relates to a novel water supply heat recovery technical scheme for the secondary reheating unit of a thermal power station, wherein the water supply heat recovery system is capable of reducing the heat consumption of the unit remarkably. A new 2 extraction component, a new 3 extraction component and a new 4 extraction component which are lower in enthalpy value and lower in the degree of superheat replace a 2 extraction component, a 3 extraction component, a 4 extraction component, a 5 extraction component and a 6 extraction component which are higher in enthalpy value and higher in the degree of superheat and arranged on a high-pressure cylinder or a middle-pressure cylinder; due to the fact that the exergy loss is reduced greatly in the water supply and heat recovery processes, the output power of a generator is increased remarkably, the heat consumption of the unit is reduced, the operation safety is improved, and obvious heat economy benefits are provided; the degree of superheat of the new 3 extraction component is reduced greatly, so that the opening of the No. 3 high-pressure steam-inlet check regulation valve is controlled to improve the transient response capacity of load increasing of a main engine; the new 2 extraction component, the new 3 extraction component and the new 4 extraction component increase the pressure stage of a 6-stage short blade in an ultrahigh pressure cylinder, the diffluent steam continuously conducts expansion acting, and extracted steam with low enthalpy value is output from connectors of the new 2 extraction component, the new 3 extraction component and the new 4extraction component.

The invention relates to a process for transforming energy into exergy by supplying heat to a vaporous working substance subjected to an expansion and compression cycle and by obtaining the exergy in the expansion stage of the cycle. The cycle is performed in a single phase area of the vaporous working substance and working substance in liquid state is supplied to the cycle during the compression stage.

The invention discloses a method for setting the generating temperature of a steam compression-enhanced ejector refrigeration system during designing based on 'exergy' efficiency calculation so as to make the system designed 'exergy' efficiency be optimal. When the set generating temperature is raised, the temperature and mass of high-temperature and high-pressure steam cooled in a liquid storage tank in the cooling subprocedure can be increased, the 'exergy' value of heat wasted by the system is increased, and therefore the system designed 'exergy' efficiency is improved at first and then lowered, and a maximum value exists. The set generating temperature corresponding to the maximal system designed 'exergy' efficiency is defined as an optimal set generating temperature. When the optimal set generating temperature is within a temperature range allowed by the temperature of a heat source, the generating temperature should be set at the optimal set generating temperature. When the optimal set generating temperature is lower than the temperature allowed by the heat source, the generating temperature should be set at the lowest temperature allowed by the heat source. When the optimal set generating temperature is higher than the temperature allowed by the heat source, the generating temperature should be set at the highest temperature allowed by the heat source.

The invention discloses a carbon dioxide power generation system adopting oxygen-enriched combustion integrated with solar dry methane reforming, and belonging to the field of solar-assisted thermal power generation. The system is mainly composed of a solar reforming reactor, a multi-flow heat exchanger, a compressor, a combustion chamber, a turbine, a heat regenerator, an air separation device and other parts. In the system, the gathered high-temperature solar energy provides heat for a catalytic reforming reaction for methane and carbon dioxide, the generated synthesis gas is subjected to oxygen-enriched combustion and direct heating to drive supercritical carbon dioxide to generate power, and combustion products can be separated from tail gas; carbon dioxide generated due to thermal power generation can be used for fuel synthesis, and resource utilization is carried out; and according to the system, efficient recovery for heat exergy and pressure energy is realized by additionally arranging the multi-flow heat exchanger and the low-pressure turbine. According to the system, the influence of solar fluctuation on power cycle can be reduced by integrating the solar energy at a fuelside; and meanwhile, the zero release of carbon-based fuel power generation is realized through supercritical carbon dioxide power cycle adopting oxygen-enriched combustion and direct heating.

An optimized control method for a primary frequency regulation based on an exergy storage correction of a thermodynamic system of a coal-fired unit is provided. Through measuring and recording temperatures and pressures of working fluids and metal heating surfaces of the coal-fired unit thermodynamic system in real-time, an exergy storage amount of the thermodynamic system is obtained. During a transient process, according to an exergy storage variation before and after acting of each regulation scheme, a maximum power output of each scheme is obtained. Thereafter, through comparing the maximum power output with a maximum power regulation quantity required by a current frequency regulation, an optimal primary frequency regulation control scheme is selected, and a primary frequency regulation control logic is corrected, so as to be high-efficiently and accurately involved in the primary frequency regulation control and maintain a fast and stable grid frequency. The present invention improves a predictive accuracy of an actual effect of the various thermodynamic system regulation schemes and reduces a selection blindness of the primary frequency regulation schemes, so that an operation flexibility of the coal-fired power unit during the transient processes is greatly improved.

The invention discloses an exergy pump type natural gas modification system.The exergy pump type natural gas modification system comprises a reactor (1), a heater (2) and a heat pipe (3).The lower portion of the reactor (1) is provided with a natural gas inlet and a hot working medium inlet, wherein a hot working medium is carbon dioxide or water steam; the upper portion of the reactor (1) is provided with a hot modified gas outlet.One part of the heat pipe (3) is arranged in the reactor (1), and the other part of the heat pipe (3) is arranged in the heater (2).Natural gas and water steam or carbon oxide and other chemical working media are adopted for conducting an external heated modification reaction, and low-exergy-value heat energy is improved into natural gas modified gas high-exergy-value chemical energy.The exergy pump type natural gas modification system has the advantages that the natural gas modification process efficiency is high, and high energy-saving benefits are achieved; solar energy is improved into gas chemical energy, so that storage is convenient, the storage problem of solar energy is solved, and the peak pitching problem of natural gas is solved; carbon dioxide is adopted as the chemical working medium, and the effect of reducing carbon dioxide emission can be achieved.

The invention discloses a primary and secondary air heat distribution and adjusting system. The primary and secondary air heat distribution and adjusting system comprises a water circulation system, aprimary air cooler, an air preheater and a secondary air heater. The water circulation system is connected between the primary air cooler and the secondary air heater. The air preheater comprises a primary air bin and a secondary air bin. An air outlet of the primary air bin is connected with an air inlet of the primary air cooler, and an air inlet of the secondary air bin is connected with an air outlet of the secondary air heater. The invention further provides an adjusting method. The primary and secondary air heat distribution and adjusting system and the adjusting method have the beneficial effects that redistribution of primary and secondary air heat is achieved, and the large exergy loss caused by the fact that the smoke exhaust temperature is decreased by heating condensation water is avoided; the heat exchange effect of the air preheater is improved, the smoke exhaust temperature is decreased, blockage of the air preheater can be relieved, and the safety of the air preheatercan be improved while operating economy of a boiler is improved; and the low-temperature corrosion phenomenon existing in heat exchange of air and smoke in a traditional method is relieved effectively.