CN105649697A - Cascade type organic Rankine cycle system - Google Patents
Cascade type organic Rankine cycle system Download PDFInfo
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- CN105649697A CN105649697A CN201610008229.9A CN201610008229A CN105649697A CN 105649697 A CN105649697 A CN 105649697A CN 201610008229 A CN201610008229 A CN 201610008229A CN 105649697 A CN105649697 A CN 105649697A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
Abstract
The invention discloses a cascade type organic Rankine cycle system. The cascade type organic Rankine cycle system comprises first organic Rankine cycle subsystems and second organic Rankine cycle subsystems; the first organic Rankine cycle subsystems and the second organic Rankine cycle subsystems both comprise evaporators, pre-heaters, liquid pumps, condensers, expanders and power generators; the power generators are synchronous or asynchronous double output shaft motors, and the first organic Rankine cycle subsystems and the corresponding second organic Rankine cycle subsystems share one power generator and one condenser; high-temperature thermal fluid is adopted as the heat source of the organic Rankine cycle system, one part of the thermal fluid flows out through the first pre-heaters after flowing through the first evaporators, and the other part of the thermal fluid enters the second organic Rankine cycle subsystems and sequentially flows through the second evaporators and the second pre-heaters of the second organic Rankine cycle subsystems. The cascade type organic Rankine cycle system can greatly improve the thermal efficiency.
Description
Technical field
The invention belongs to organic Rankine bottoming cycle technical field, it relates to a kind of organic rankine cycle system, particularly relate to a kind of cascade organic Rankine cycle system.
Background technology
Referring to Fig. 1, Fig. 1 is typical organic Rankine bottoming cycle (OrganicRankinCycle, an ORC) system, comprises decompressor 1 ', generator 2 ', vaporizer 3 ', liquor pump 4 ', condenser 5 '.
The liquid refrigerating working medium of low-temp low-pressure is boosted in liquor pump 4 '; Then entering vaporizer 3 ' by heating vaporization, until after becoming overheated gas (High Temperature High Pressure), entering decompressor 1 ' expansion work, driving generator 2 ' to generate electricity. Low-temp low-pressure gas after acting enters that condenser 5 ' is cooled condenses into liquid; Return to again in liquor pump 4 ', complete a circulation.
For organic Rankine bottoming cycle, the temperature difference between hot-fluid and envrionment temperature is more big, and thermo-efficiency is more high. But, existing organic rankine cycle system, only includes one group of organic Rankine bottoming cycle unit (namely only comprising a decompressor, a generator, a vaporizer, a liquor pump, a condenser); Thermal source only connects a vaporizer usually, and the thermo-efficiency of system need further raising.
In addition, owing to the size of decompressor has a definite limitation, in order to the energy of thermal source can be made full use of, in some systems, some groups of organic Rankine bottoming cycle unit are in parallel, as shown in Figure 2, but the problem still not having resolution system thermo-efficiency lower.
In view of this, nowadays urgently need a kind of new organic rankine cycle system of design, to improve the defect of existing system.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of cascade organic Rankine cycle system, can significantly system thermal efficiency.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of cascade organic Rankine cycle system, described organic rankine cycle system comprises: an at least one ORC subsystem, at least one 2nd ORC subsystem;
A described ORC subsystem comprises the first vaporizer, the first preheater, first liquid pump, the first condenser, the first decompressor, the first generator; First vaporizer, the first preheater, first liquid pump, the first condenser, the first decompressor connect successively, and the first decompressor is connected with the first vaporizer; First decompressor is connected with the first generator;
Described 2nd ORC subsystem comprises the 2nd vaporizer, the 2nd preheater, second liquid pump, the 2nd condenser, the 2nd decompressor, the 2nd generator; 2nd vaporizer, the 2nd preheater, second liquid pump, the 2nd condenser, the 2nd decompressor connect successively, and the 2nd decompressor is connected with the 2nd vaporizer; 2nd decompressor is connected with the 2nd generator;
Described generator is synchronous or is asynchronous pair of output shaft electric machine, and an ORC subsystem shares a generator with the 2nd corresponding ORC subsystem;
In each ORC subsystem, the 2nd ORC subsystem, a part or all of ORC subsystem shares same condenser with the 2nd corresponding ORC subsystem;
Described organic rankine cycle system adopts high-temperature hot fluid as thermal source, and hot-fluid is after the first vaporizer, and a part flows out through the first preheater; Another part enters the 2nd ORC subsystem, and successively by the 2nd vaporizer of the 2nd ORC subsystem and the 2nd preheater;
Transfer out after the hot-fluid of a described ORC subsystem, the 2nd ORC subsystem mixes, or transfer out separately;
Described first preheater outlet arranges the first regulated valve, the first temperature sensor, the first controller, and the first controller connects the first regulated valve, the first temperature sensor respectively; First preheater leaving water temperature(LWT) is sent to the first controller by the first temperature sensor, first controller adjusts the aperture of the first regulated valve by the first preheater leaving water temperature(LWT), thus regulates and enter the first preheater and enter the flow proportional of the 2nd vaporizer;
Realizing when the first preheater hot fluid flow rate of an ORC subsystem reduces, the first preheater leaving water temperature(LWT) decreases, and unnecessary higher-grade hot water enters the 2nd vaporizer of the 2nd ORC subsystem, because of its hot water temperature's height, it is to increase system thermal efficiency.
The different ORC unit generation power of adjustment flexibly, and realize hot fluid outlet temperature control.
Described organic rankine cycle system also comprises database module, Intelligent adjustment module, Intelligent adjustment model calling database module;
Described database module store historical data is or/and preferred recommending data; Database module stores: the aperture of the first preheater leaving water temperature(LWT), the first regulated valve, enter the 2nd evaporator flow ratio, an ORC subsystem generated output, the 2nd ORC subsystem generated output, system thermal efficiency;
Described Intelligent adjustment module or/and generated output needed for the 2nd ORC subsystem, regulates the aperture of the first regulated valve in order to generated output needed for an ORC subsystem in conjunction with the immediate relevant data in database module;
The aperture of the first regulated valve is also regulated by described Intelligent adjustment module, calculate corresponding system thermal efficiency, select to satisfy the demands and data that system thermal efficiency is the highest determine the aperture of the first regulated valve, and according to demand or external environment change Automatic adjusument; If the data that thermo-efficiency is the highest are the data newly adjusted, then these group data are recorded in database module.
A kind of cascade organic Rankine cycle system, described organic rankine cycle system comprises: an at least one ORC subsystem, at least one 2nd ORC subsystem;
A described ORC subsystem comprises the first vaporizer, the first preheater, first liquid pump, the first condenser, the first decompressor, the first generator; First vaporizer, the first preheater, first liquid pump, the first condenser, the first decompressor connect successively, and the first decompressor is connected with the first vaporizer; First decompressor is connected with the first generator;
Described 2nd ORC subsystem comprises the 2nd vaporizer, the 2nd preheater, second liquid pump, the 2nd condenser, the 2nd decompressor, the 2nd generator; 2nd vaporizer, the 2nd preheater, second liquid pump, the 2nd condenser, the 2nd decompressor connect successively, and the 2nd decompressor is connected with the 2nd vaporizer; 2nd decompressor is connected with the 2nd generator;
Described generator is synchronous or is asynchronous pair of output shaft electric machine, and an ORC subsystem shares a generator with the 2nd corresponding ORC subsystem;
In each ORC subsystem, the 2nd ORC subsystem, a part or all of ORC subsystem shares same condenser with the 2nd corresponding ORC subsystem;
Described organic rankine cycle system adopts high-temperature hot fluid as thermal source, and hot-fluid is after the first vaporizer, and a part flows out through the first preheater; Another part enters the 2nd ORC subsystem, and successively by the 2nd vaporizer of the 2nd ORC subsystem and the 2nd preheater.
As a preferred embodiment of the present invention, transfer out after the hot-fluid of a described ORC subsystem, the 2nd ORC subsystem mixes, or transfer out separately.
As a preferred embodiment of the present invention, described first preheater outlet arranges the first regulated valve, the first temperature sensor, the first controller, and the first controller connects the first regulated valve, the first temperature sensor respectively; First preheater leaving water temperature(LWT) is sent to the first controller by the first temperature sensor, first controller adjusts the aperture of the first regulated valve by the first preheater leaving water temperature(LWT), thus regulates and enter the first preheater and enter the flow proportional of the 2nd vaporizer.
As a preferred embodiment of the present invention, realizing when the first preheater hot fluid flow rate of an ORC subsystem reduces, the first preheater leaving water temperature(LWT) decreases, and unnecessary higher-grade hot water enters the 2nd vaporizer of the 2nd ORC subsystem, because of its hot water temperature's height, it is to increase system thermal efficiency.
As a preferred embodiment of the present invention, the different ORC unit generation power of adjustment flexibly, and realize hot fluid outlet temperature control.
As a preferred embodiment of the present invention, described hot-fluid is hot water or heat oil.
As a preferred embodiment of the present invention, described organic rankine cycle system also comprises database module, Intelligent adjustment module, Intelligent adjustment model calling database module;
Described database module store historical data is or/and preferred recommending data; Database module stores: the aperture of the first preheater leaving water temperature(LWT), the first regulated valve, enter the 2nd evaporator flow ratio, an ORC subsystem generated output, the 2nd ORC subsystem generated output, system thermal efficiency;
Described Intelligent adjustment module or/and generated output needed for the 2nd ORC subsystem, regulates the aperture of the first regulated valve in order to generated output needed for an ORC subsystem in conjunction with the immediate relevant data in database module;
The aperture of the first regulated valve is also regulated by described Intelligent adjustment module, calculate corresponding system thermal efficiency, select to satisfy the demands and data that system thermal efficiency is the highest determine the aperture of the first regulated valve, and according to demand or external environment change Automatic adjusument; If the data that thermo-efficiency is the highest are the data newly adjusted, then these group data are recorded in database module.
The useful effect of the present invention is: the cascade organic Rankine cycle system that the present invention proposes, and can significantly improve system thermal efficiency.
The present invention is by adjustment preheater and evaporator flow ratio, it is possible to the different ORC unit generation power of adjustment flexibly, and realizes hot fluid outlet temperature control. Under hot-fluid falls condition with isothermal, this Land use systems compares single-stage Utilization plan, effectively improves system thermal efficiency.
In single-stage ORC system, envrionment temperature or cold source temperature determine the condensing temperature of ORC, if at this moment vaporization temperature is more high, the thermo-efficiency of circulation is more high. For the hot-fluid that large discharge, high temperature fall, if adopting single-stage ORC system, under the prerequisite that same temperature is fallen, it is necessary to reduce vaporization temperature, cause thermo-efficiency to reduce. If adopting tandem ORC system, then can significantly improve system thermal efficiency. Different according to heat resource form, under same condition, (cold source identical, temperature fall identical) thermo-efficiency can improve 10-15%.
Accompanying drawing explanation
Fig. 1 is the composition schematic diagram of existing organic Rankine cycle power generation system.
Fig. 2 is the composition schematic diagram of existing organic Rankine cycle power generation system in parallel.
Fig. 3 is the composition schematic diagram of cascade organic Rankine cycle system of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
Embodiment one
Referring to Fig. 3, present invention is disclosed a kind of cascade organic Rankine cycle system, described organic rankine cycle system comprises: an at least one ORC subsystem, at least one 2nd ORC subsystem.
A described ORC subsystem comprises the first vaporizer, the first preheater, first liquid pump, the first condenser, the first decompressor, the first generator; First vaporizer, the first preheater, first liquid pump, the first condenser, the first decompressor connect successively, and the first decompressor is connected with the first vaporizer; First decompressor is connected with the first generator.
Described 2nd ORC subsystem comprises the 2nd vaporizer, the 2nd preheater, second liquid pump, the 2nd condenser, the 2nd decompressor, the 2nd generator; 2nd vaporizer, the 2nd preheater, second liquid pump, the 2nd condenser, the 2nd decompressor connect successively, and the 2nd decompressor is connected with the 2nd vaporizer; 2nd decompressor is connected with the 2nd generator.
Described generator is synchronous or is asynchronous pair of output shaft electric machine, and an ORC subsystem shares a generator with the 2nd corresponding ORC subsystem.
In each ORC subsystem, the 2nd ORC subsystem, a part or all of ORC subsystem shares same condenser with the 2nd corresponding ORC subsystem. Namely the first condenser, the 2nd condenser are same condenser.
Described organic rankine cycle system adopts high-temperature hot fluid as thermal source, and hot-fluid is after the first vaporizer, and a part flows out through the first preheater; Another part enters the 2nd ORC subsystem, and successively by the 2nd vaporizer of the 2nd ORC subsystem and the 2nd preheater.
Transfer out after the hot-fluid of a described ORC subsystem, the 2nd ORC subsystem mixes, or transfer out separately.
Described first preheater outlet arranges the first regulated valve, the first temperature sensor, the first controller, and the first controller connects the first regulated valve, the first temperature sensor respectively; First preheater leaving water temperature(LWT) is sent to the first controller by the first temperature sensor, first controller adjusts the aperture of the first regulated valve by the first preheater leaving water temperature(LWT), thus regulates and enter the first preheater and enter the flow proportional of the 2nd vaporizer.
Realizing when the first preheater hot fluid flow rate of an ORC subsystem reduces, the first preheater leaving water temperature(LWT) decreases, and unnecessary higher-grade hot water enters the 2nd vaporizer of the 2nd ORC subsystem, because of its hot water temperature's height, it is to increase system thermal efficiency. Different ORC unit generation power, and realize hot fluid outlet temperature control.
Embodiment two
The difference of the present embodiment and embodiment one is, in the present embodiment, series connection unit is greater than 2, system utilize form and embodiment one similar, hot-fluid enters next stage ORC system evaporator by previous stage ORC system evaporator outlet, each preheater outlet hot-fluid mixes, or each ORC system heat flux transfers out respectively.
Embodiment three
A kind of cascade organic Rankine cycle system, described organic rankine cycle system comprises: an at least one ORC subsystem, at least one 2nd ORC subsystem.
A described ORC subsystem comprises the first vaporizer, the first preheater, first liquid pump, the first condenser, the first decompressor, the first generator; First vaporizer, the first preheater, first liquid pump, the first condenser, the first decompressor connect successively, and the first decompressor is connected with the first vaporizer; First decompressor is connected with the first generator.
Described 2nd ORC subsystem comprises the 2nd vaporizer, the 2nd preheater, second liquid pump, the 2nd condenser, the 2nd decompressor, the 2nd generator; 2nd vaporizer, the 2nd preheater, second liquid pump, the 2nd condenser, the 2nd decompressor connect successively, and the 2nd decompressor is connected with the 2nd vaporizer; 2nd decompressor is connected with the 2nd generator.
Described generator is synchronous or is asynchronous pair of output shaft electric machine, and an ORC subsystem shares a generator with the 2nd corresponding ORC subsystem.
In each ORC subsystem, the 2nd ORC subsystem, a part or all of ORC subsystem shares same condenser with the 2nd corresponding ORC subsystem.
Described organic rankine cycle system adopts high-temperature hot fluid as thermal source, and hot-fluid is after the first vaporizer, and a part flows out through the first preheater; Another part enters the 2nd ORC subsystem, and successively by the 2nd vaporizer of the 2nd ORC subsystem and the 2nd preheater.
Embodiment four
The difference of the present embodiment and embodiment one is, in the present embodiment, described organic rankine cycle system also comprises database module, Intelligent adjustment module, Intelligent adjustment model calling database module.
Described database module store historical data is or/and preferred recommending data; Database module stores: the aperture of the first preheater leaving water temperature(LWT), the first regulated valve, enter the 2nd evaporator flow ratio, an ORC subsystem generated output, the 2nd ORC subsystem generated output, system thermal efficiency.
Described Intelligent adjustment module or/and generated output needed for the 2nd ORC subsystem, regulates the aperture of the first regulated valve in order to generated output needed for an ORC subsystem in conjunction with the immediate relevant data in database module.
The aperture of the first regulated valve is also regulated and (can finely tune by described Intelligent adjustment module, the amplitude can also be regulated) bigger, calculate corresponding system thermal efficiency, select to satisfy the demands and data that system thermal efficiency is the highest determine the aperture of the first regulated valve, and according to demand or external environment change Automatic adjusument; If the data that thermo-efficiency is the highest are the data newly adjusted, then these group data are recorded in database module.
In sum, the cascade organic Rankine cycle system that the present invention proposes, can significantly improve system thermal efficiency. The present invention is by adjustment preheater and evaporator flow ratio, it is possible to the different ORC unit generation power of adjustment flexibly, and realizes hot fluid outlet temperature control. Under hot-fluid falls condition with isothermal, this Land use systems compares single-stage Utilization plan, effectively improves system thermal efficiency.
In single-stage ORC system, envrionment temperature or cold source temperature determine the condensing temperature of ORC, if at this moment vaporization temperature is more high, the thermo-efficiency of circulation is more high. For the hot-fluid that large discharge, high temperature fall, if adopting single-stage ORC system, under the prerequisite that same temperature is fallen, it is necessary to reduce vaporization temperature, cause thermo-efficiency to reduce. If adopting tandem ORC system, then can significantly improve system thermal efficiency. Different according to heat resource form, under same condition, (cold source identical, temperature fall identical) thermo-efficiency can improve 10-15%.
Here description of the invention and application are explanation property, not want by the range limit of the present invention in the above-described embodiments. Distortion and the change of embodiment disclosed here are possible, for those this areas those of ordinary skill embodiment replace and the various parts of equivalence are known. It should be clear to a person skilled in the art that, when not departing from spirit or the essential characteristic of the present invention, the present invention can in other forms, structure, layout, ratio, and realize with other assembly, material and parts. When not departing from the scope of the invention and spirit, it is possible to embodiment disclosed here is carried out other distortion and changes.
Claims (8)
1. a cascade organic Rankine cycle system, it is characterised in that, described organic rankine cycle system comprises: an at least one ORC subsystem, at least one 2nd ORC subsystem;
A described ORC subsystem comprises the first vaporizer, the first preheater, first liquid pump, the first condenser, the first decompressor, generator; First vaporizer, the first preheater, first liquid pump, the first condenser, the first decompressor connect successively, and the first decompressor is connected with the first vaporizer; First decompressor is connected with generator;
Described 2nd ORC subsystem comprises the 2nd vaporizer, the 2nd preheater, second liquid pump, the 2nd condenser, the 2nd decompressor, generator; 2nd vaporizer, the 2nd preheater, second liquid pump, the 2nd condenser, the 2nd decompressor connect successively, and the 2nd decompressor is connected with the 2nd vaporizer; 2nd decompressor is connected with generator;
Described generator is synchronous or is asynchronous pair of output shaft electric machine, and an ORC subsystem shares a generator with the 2nd corresponding ORC subsystem;
In each ORC subsystem, the 2nd ORC subsystem, a part or all of ORC subsystem shares same condenser with the 2nd corresponding ORC subsystem;
Described organic rankine cycle system adopts high-temperature hot fluid as thermal source, and hot-fluid is after the first vaporizer, and a part flows out through the first preheater; Another part enters the 2nd ORC subsystem, and successively by the 2nd vaporizer of the 2nd ORC subsystem and the 2nd preheater;
Transfer out after the hot-fluid of a described ORC subsystem, the 2nd ORC subsystem mixes, or transfer out separately;
Described first preheater outlet arranges the first regulated valve, the first temperature sensor, the first controller, and the first controller connects the first regulated valve, the first temperature sensor respectively; First preheater leaving water temperature(LWT) is sent to the first controller by the first temperature sensor, first controller adjusts the aperture of the first regulated valve by the first preheater leaving water temperature(LWT), thus regulates and enter the first preheater and enter the flow proportional of the 2nd vaporizer;
Realizing when the first preheater hot fluid flow rate of an ORC subsystem reduces, the first preheater leaving water temperature(LWT) decreases, and unnecessary higher-grade hot water enters the 2nd vaporizer of the 2nd ORC subsystem, because of its hot water temperature's height, it is to increase system thermal efficiency; The different ORC unit generation power of adjustment flexibly, and realize hot fluid outlet temperature control;
Described organic rankine cycle system also comprises database module, Intelligent adjustment module, Intelligent adjustment model calling database module;
Described database module store historical data is or/and preferred recommending data; Database module stores: the aperture of the first preheater leaving water temperature(LWT), the first regulated valve, enter the 2nd evaporator flow ratio, an ORC subsystem generated output, the 2nd ORC subsystem generated output, system thermal efficiency;
Described Intelligent adjustment module or/and generated output needed for the 2nd ORC subsystem, regulates the aperture of the first regulated valve in order to generated output needed for an ORC subsystem in conjunction with the immediate relevant data in database module;
The aperture of the first regulated valve is also regulated by described Intelligent adjustment module, calculate corresponding system thermal efficiency, select to satisfy the demands and data that system thermal efficiency is the highest determine the aperture of the first regulated valve, and according to demand or external environment change Automatic adjusument; If the data that thermo-efficiency is the highest are the data newly adjusted, then these group data are recorded in database module.
2. a cascade organic Rankine cycle system, it is characterised in that, described organic rankine cycle system comprises: an at least one ORC subsystem, at least one 2nd ORC subsystem;
A described ORC subsystem comprises the first vaporizer, the first preheater, first liquid pump, the first condenser, the first decompressor, the first generator; First vaporizer, the first preheater, first liquid pump, the first condenser, the first decompressor connect successively, and the first decompressor is connected with the first vaporizer; First decompressor is connected with the first generator;
Described 2nd ORC subsystem comprises the 2nd vaporizer, the 2nd preheater, second liquid pump, the 2nd condenser, the 2nd decompressor, the 2nd generator; 2nd vaporizer, the 2nd preheater, second liquid pump, the 2nd condenser, the 2nd decompressor connect successively, and the 2nd decompressor is connected with the 2nd vaporizer; 2nd decompressor is connected with the 2nd generator;
Described generator is synchronous or is asynchronous pair of output shaft electric machine, and an ORC subsystem shares a generator with the 2nd corresponding ORC subsystem;
In each ORC subsystem, the 2nd ORC subsystem, a part or all of ORC subsystem shares same condenser with the 2nd corresponding ORC subsystem;
Described organic rankine cycle system adopts high-temperature hot fluid as thermal source, and hot-fluid is after the first vaporizer, and a part flows out through the first preheater; Another part enters the 2nd ORC subsystem, and successively by the 2nd vaporizer of the 2nd ORC subsystem and the 2nd preheater.
3. cascade organic Rankine cycle system according to claim 2, it is characterised in that:
Transfer out after the hot-fluid of a described ORC subsystem, the 2nd ORC subsystem mixes, or transfer out separately.
4. cascade organic Rankine cycle system according to claim 2, it is characterised in that:
Described first preheater outlet arranges the first regulated valve, the first temperature sensor, the first controller, and the first controller connects the first regulated valve, the first temperature sensor respectively; First preheater leaving water temperature(LWT) is sent to the first controller by the first temperature sensor, first controller adjusts the aperture of the first regulated valve by the first preheater leaving water temperature(LWT), thus regulates and enter the first preheater and enter the flow proportional of the 2nd vaporizer.
5. cascade organic Rankine cycle system according to claim 4, it is characterised in that:
Realizing when the first preheater hot fluid flow rate of an ORC subsystem reduces, the first preheater leaving water temperature(LWT) decreases, and unnecessary higher-grade hot water enters the 2nd vaporizer of the 2nd ORC subsystem, because of its hot water temperature's height, it is to increase system thermal efficiency.
6. cascade organic Rankine cycle system according to claim 2, it is characterised in that:
The different ORC unit generation power of adjustment flexibly, and realize hot fluid outlet temperature control.
7. cascade organic Rankine cycle system according to claim 2, it is characterised in that:
Described hot-fluid is hot water or heat oil.
8. cascade organic Rankine cycle system according to claim 2, it is characterised in that:
Described organic rankine cycle system also comprises database module, Intelligent adjustment module, Intelligent adjustment model calling database module;
Described database module store historical data is or/and preferred recommending data; Database module stores: the aperture of the first preheater leaving water temperature(LWT), the first regulated valve, enter the 2nd evaporator flow ratio, an ORC subsystem generated output, the 2nd ORC subsystem generated output, system thermal efficiency;
Described Intelligent adjustment module or/and generated output needed for the 2nd ORC subsystem, regulates the aperture of the first regulated valve in order to generated output needed for an ORC subsystem in conjunction with the immediate relevant data in database module;
The aperture of the first regulated valve is also regulated by described Intelligent adjustment module, calculate corresponding system thermal efficiency, select to satisfy the demands and data that system thermal efficiency is the highest determine the aperture of the first regulated valve, and according to demand or external environment change Automatic adjusument; If the data that thermo-efficiency is the highest are the data newly adjusted, then these group data are recorded in database module.
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Application publication date: 20160608 |