CN105444457A - Two-stage type absorption refrigerating unit and control method thereof - Google Patents
Two-stage type absorption refrigerating unit and control method thereof Download PDFInfo
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- CN105444457A CN105444457A CN201510993797.4A CN201510993797A CN105444457A CN 105444457 A CN105444457 A CN 105444457A CN 201510993797 A CN201510993797 A CN 201510993797A CN 105444457 A CN105444457 A CN 105444457A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/002—Machines, plants or systems, using particular sources of energy using solar energy
- F25B27/007—Machines, plants or systems, using particular sources of energy using solar energy in sorption type systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/04—Arrangement or mounting of control or safety devices for sorption type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2315/00—Sorption refrigeration cycles or details thereof
- F25B2315/007—Parallel systems therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
Abstract
The invention discloses a two-stage type absorption refrigerating unit and a control method thereof. The unit comprises a condenser (102), a generator (104), an evaporator (106) and an absorber (108), wherein the generator (104) comprises a two-stage structure including a first-stage generator and a second-stage generator; the first-stage generator and the second-stage generator supply heat for the unit by using different heat sources respectively; the two-stage structure is a separation type structure which is arranged vertically; the first-stage generator is located at the upper portion and is a low-pressure stage generator (1042); and the second generator is located at the lower portion and is a high-pressure stage generator (1044). According to the technical scheme, defects of poor reliability, small application range, low energy utilization rate and the like can be overcome; and the benefits of excellent reliability, large application range and high energy utilization rate are achieved.
Description
Technical field
The present invention relates to thermal source reutilization technology field, particularly, relate to a kind of two-stage type absorption refrigeration unit and control method thereof.
Background technology
Lithium bromide absorption refrigerating set is a kind of with heat-driven and the few refrigeration unit of power consumption, be applied at present more some thermals source easily obtain or fuel-firing gas-firing conveniently regional.The type lithium bromide absorption-type machine unit, be mainly divided into single-action and economic benefits and social benefits two kinds, basic procedure situation as shown in Figure 1.
In lithium bromide absorbing type refrigeration, water is as cold-producing medium, and lithium bromide is as absorbent.
Because the boiling point of lithium bromide water solution own is very high, extremely difficult volatilization, so can think that the steam on lithium bromide saturated solution liquid level is either pure steam; At a certain temperature, the saturated partial pressure of water vapour on lithium bromide water solution liquid level is less than pure water saturation partial pressure; And concentration is higher, the saturated partial pressure of the water vapour on liquid level is less.So under identical temperature conditions, lithium bromide water solution concentration is larger, and its ability absorbing moisture is stronger.This namely adopts lithium bromide as absorbent usually, and water is as the reason of cold-producing medium.
See Fig. 1, lithium bromide absorption refrigerating set, mainly comprises condenser 102, generator 104, evaporimeter 106, absorber 108, heat exchanger 110 and circulating pump.
Because the high-temperature-hot-water of the many employings of the type lithium bromide absorption-type machine unit more than 120 DEG C, high-temperature steam, fuel oil and combustion gas etc. are as driving heat source, its application region is greatly limited, so, be unfavorable for the large-scale promotion of unit.But, for the industrial and agricultural development present situation of China, have the low temperature exhaust heat water of a large amount of 70-90 DEG C not utilize at present, and China is also the country that a solar energy extremely enriches, especially south China area, employing fuel oil, combustion gas cause the waste of non-renewable energy resources to a certain extent.
In prior art, there is the defects such as the little and energy utilization rate of poor reliability, the scope of application is low.
Summary of the invention
The object of the invention is to, for above-mentioned defect, a kind of two-stage type absorption refrigeration unit and control method thereof are proposed, different thermals source is adopted to carry out heat supply to described unit to solve by the generator of two-layer configuration, more preferably ensure that unit normally runs, promote heat utilization rate, reduce the problem of thermal waste.
One aspect of the present invention provides a kind of two-stage type absorption refrigeration unit, comprises condenser, generator, evaporimeter and absorber; Wherein, described generator is the two-layer configuration comprising first order generator and second level generator, and described first order generator and described second level generator adopt different thermals source to carry out heat supply to described unit respectively; And described two-layer configuration is partition structure setting up and down, wherein said first order generator is positioned at top, is low-pressure stage generator; Described second level generator is positioned at bottom, is hiigh pressure stage generator.
Preferably, adopt different thermals source to carry out heat supply to described unit to comprise: utilize low temperature exhaust heat thermal source and/or solar energy to provide driving heat for described unit.
Preferably, described low temperature exhaust heat thermal source and/or solar energy are communicated to one of them in described first order generator and described second level generator by the first heat exchange connecting pipeline.
Preferably, adopt different thermals source to carry out heat supply to described unit also to comprise: utilize afterburning thermal source to provide supplying heat for described unit.
Preferably, described afterburning thermal source is communicated to the another one in described first order generator and second level generator by the second heat exchange connecting pipeline.
Preferably, when described different thermal source comprises low temperature exhaust heat thermal source and/or solar energy simultaneously, during with afterburning thermal source, described low temperature exhaust heat thermal source and/or solar energy are communicated to described low-pressure stage generator by the first heat exchange connecting pipeline, and described afterburning thermal source is communicated to described hiigh pressure stage generator by described second heat exchange connecting pipeline.
Preferably, the cloth liquid mode in superposed described low pressure generator adopts Drip irrigation, and the cloth liquid mode being arranged in the described hiigh pressure stage generator of bottom adopts full liquid to arrange.
Preferably, between described partition structure setting up and down, also liquid-blocking device is provided with.
Preferably, described liquid-blocking device is filled type liquid barrier.Preferably, when described different thermal source comprises described low temperature exhaust heat thermal source, described low temperature exhaust heat thermal source is low temperature waste gas and/or low temperature exhaust heat water.
Preferably, the temperature of described low temperature exhaust heat water is the low temperature exhaust heat water of 70-90 DEG C.
Preferably, described afterburning thermal source is at least one in fuel oil, combustion gas, high-temperature flue gas.
Preferably, the absorbent of described absorption installation is lithium bromide.
Match with above-mentioned unit, the present invention provides a kind of control method of two-stage type absorption refrigeration unit on the other hand, comprising: use above-described unit, controls to adjust according to different actual conditions to it.
Preferably, when described different thermal source comprises low temperature exhaust heat thermal source and/or solar energy simultaneously, during with afterburning thermal source, and when low temperature exhaust heat thermal source and/or solar energy meet unit demand, the afterburning thermal source of closing hiigh pressure stage generator and being connected with hiigh pressure stage generator.
Preferably, when described different thermal source comprises low temperature exhaust heat thermal source and/or solar energy simultaneously, during with afterburning thermal source, and when described low temperature exhaust heat thermal source and/or solar energy input shortage of heat to drive described unit normally to run, open described afterburning thermal source, for described unit increases additional heat, ensure that described unit normally runs.
The solution of the present invention, takes full advantage of low temperature exhaust heat and solar energy resources, has expanded the range of application of lithium bromide absorption-type machine unit.Adopt the program, not only make low-temperature waste heat, waste water and solar energy be used in lithium bromide absorption-type machine unit, saved the application of non-renewable energy resources and other high-grade thermals source, also expanded the scope of application of lithium bromide absorption-type machine unit.
Further, the solution of the present invention, have employed the driving as lithium bromide absorption-type machine unit of low temperature exhaust heat thermal source and solar energy; Generator adopts two-stage to arrange, and adopts different heat sources to carry out heat supply respectively, has saved the application of non-renewable energy resources and other high-grade thermals source, has also expanded the range of application of lithium bromide absorption-type machine unit in low temperature exhaust heat field and field of solar energy.
Thus, the solution of the present invention solves and utilizes the generator of two-layer configuration to adopt different thermals source to carry out heat supply to described unit, more preferably ensure that unit (such as: lithium bromide absorption refrigerating set) normally runs, promote heat utilization rate, reduce the problem of thermal waste, thus, overcome poor reliability in prior art, the scope of application is little and energy utilization rate is low defect, realize good reliability, the scope of application is large and energy utilization rate is high beneficial effect.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from description, or understand by implementing the present invention.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for description, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural representation of existing lithium bromide absorption refrigerating set;
Fig. 2 is the structural representation of an embodiment of two-stage type absorption refrigeration unit of the present invention.
By reference to the accompanying drawings, in the embodiment of the present invention, Reference numeral is as follows:
102-condenser; 104-generator; 1042-low-pressure stage generator; 1044-hiigh pressure stage generator; 106-evaporimeter; 108-absorber; 110-plate type heat exchanger; 112-solution pump; 114-cryogenic fluid pump; 116-choke valve; 118-pressure-reducing valve; 120-liquid-blocking device; 122-first heat exchange connecting pipeline; 124-second heat exchange connecting pipeline.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with the specific embodiment of the invention and corresponding accompanying drawing, technical solution of the present invention is clearly and completely described.Obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
According to embodiments of the invention, provide a kind of two-stage type absorption refrigeration unit.This unit comprises: condenser 102, generator 104, evaporimeter 106 and absorber 108, wherein, described generator 104 is the two-layer configuration comprising first order generator and second level generator, and described first order generator and described second level generator adopt different thermals source to carry out heat supply to described unit respectively; And described two-layer configuration is partition structure setting up and down, wherein said first order generator is positioned at top, is low-pressure stage generator 1042; Described second level generator is positioned at bottom, is hiigh pressure stage generator 1044.
Wherein, adopt different thermals source to carry out heat supply to described unit to comprise: utilize and adopt low temperature exhaust heat thermal source and/or solar energy to provide driving heat for described unit.
In one embodiment, described low temperature exhaust heat thermal source and/or solar energy are communicated to one of them in described first order generator and described second level generator by the first heat exchange connecting pipeline 122.
Wherein, described low temperature exhaust heat thermal source is low temperature waste gas and/or low temperature exhaust heat water.Preferably, the temperature of described low temperature exhaust heat water is the low temperature exhaust heat water of 70-90 DEG C.By adopting low temperature exhaust heat and solar energy resources as driving heat source, environmental protection and energy saving is good.
Preferably, adopt different thermals source to carry out heat supply to described unit also to comprise: utilize afterburning thermal source to provide supplying heat for described unit.
In one embodiment, described afterburning thermal source is communicated to the another one in described first order generator and second level generator by the second heat exchange connecting pipeline 124.
Wherein, described afterburning thermal source is at least one in fuel oil, combustion gas, high-temperature flue gas.By as high temperature heat source as afterburning thermal source, heat exchange efficiency is high, good reliability.
In a preferred embodiment, when described different thermal source comprises low temperature exhaust heat thermal source and/or solar energy simultaneously, during with afterburning thermal source (such as: fuel oil, combustion gas, high-temperature flue gas etc.), described low temperature exhaust heat thermal source and/or solar energy are communicated to described low-pressure stage generator 1042 by the first heat exchange connecting pipeline 122, and described afterburning thermal source is communicated to described hiigh pressure stage generator 1044 by described second heat exchange connecting pipeline 124.
Thus, by the generator of two-layer configuration, adopt solar energy and/or low-temperature heat source as driving heat source, adopt afterburning thermal source as the mode of heating of extra heat source simultaneously, afterburning thermal source can be supplied when needs supply thermal source, to reach the object that unit normally runs, can make full use of low-temperature heat source and/or solar energy resources on the one hand, environmental protection and energy saving is good; The range of application of lithium bromide absorption-type machine unit can be expanded on the other hand, strengthen its versatility, and reliability is high.
Such as: the generator 104 of described two-layer configuration, adopt low-temperature heat source and/or solar energy to provide driving heat for described unit, normally run to drive described unit; And, when described low-temperature heat source and/or solar energy input shortage of heat to drive described unit normally to run, adopt afterburning thermal source disposed therein to be in advance that described unit increases additional heat, to ensure that unit normally runs simultaneously.
Such as: when the heat source temperature adopted is lower, or by weather effect in Solar use process, when causing thermal source input shortage of heat normally to run with drive train, afterburning thermal source is also furnished with in the generator of two-layer configuration, afterburning can adopt fuel oil, combustion gas, high-temperature flue gas etc. as thermal source, for unit adds extra heat source, thus ensure the normal operation of unit.
In one example in which, the absorbent of described absorption installation is lithium bromide.Adopt lithium bromide water solution as absorbent, heat exchange efficiency is high, good refrigeration effect.
Such as: low-temperature heat source and/or solar energy are by heat medium water (such as: low temperature exhaust heat water), with described afterburning thermal source by heat medium water (such as: high-temperature-hot-water), heating is placed in the lithium bromide water solution of described generator, the water vapour produced is successively after the energy exchange of described condenser 102, described evaporimeter 106 and described absorber 108, finally send described generator back to through described circulating pump, circularly cooling successively.
Particularly, in lithium bromide two-stage type absorption refrigeration unit running, after lithium bromide water solution is subject to the heating of the even described afterburning thermal source of described low-temperature heat source in the generator of two-layer configuration, water in lithium bromide water solution is constantly vaporized and is become water vapour, and the concentration of the lithium bromide water solution in generator 104 constantly raises and becomes the dense lithium bromide water solution of high temperature.
The dense lithium bromide water solution of high temperature in the generator of two-layer configuration, by the lithium bromide water solution outlet bottom the generator of two-layer configuration, enters the lithium bromide water solution import at absorber 108 top and enters spray thrower.
Wherein, between the lithium bromide water solution outlet and the lithium bromide water solution import of absorber 108 of the generator of two-layer configuration, pressure-reducing valve 118 can be set, stablize to make the dense lithium bromide water solution of high temperature, circulate safely.
Water vapour in the generator of two-layer configuration, enters condenser 102, and condensation after cooling water (such as: cooling water chilled water the is exactly cooled working-medium water) cooling be condensed in device 102, becomes the aqueous water of high pressure low temperature; When this aqueous water in condenser 102 enters evaporimeter 106 by choke valve 116, this aqueous water is vaporized by rapid expansion and is become water at low temperature steam in evaporimeter 106, and in vaporescence, absorb the heat of chilled water in evaporimeter 106 in a large number, thus reach the object of cooling refrigeration; In the process, water at low temperature steam in evaporimeter 106, enter absorber 108, absorbed by the dense lithium bromide water solution of the generator from two-layer configuration in absorber 108, the concentration of the dense lithium bromide water solution in absorber 108 progressively reduces and becomes rare lithium bromide water solution, rare lithium bromide water solution is sent back to the generator of two-layer configuration again by circulating pump (such as: the solution pump 112 of lithium bromide water solution), complete whole circulation.So move in endless cycles, produce cold continuously.
Wherein, when the water at low temperature steam in evaporimeter 106 enters absorber 108, the chilled water bottom evaporimeter 106 sends evaporimeter 106 top back to by circulating pump (such as: cryogenic fluid pump 114), and continuous circulation freezes.
In one embodiment, the two-layer configuration of described first order generator and described second level generator is partition structure setting up and down, and wherein said first order generator is positioned at top, is low-pressure stage generator 1042; Described second level generator is positioned at bottom, is hiigh pressure stage generator 1044.
Such as: generator 104 inside of two-layer configuration adopts low-pressure stage generator 1042 and the hiigh pressure stage generator 1044 of separating setting up and down, wherein, described low-pressure stage generator 1042 adopts low-temperature heat source and/or solar energy to provide driving heat for described unit, and described hiigh pressure stage generator 1044 adopts afterburning thermal source to be that described unit increases additional heat; The dense lithium bromide water solution of high temperature that described low-pressure stage generator 1042 and/or hiigh pressure stage generator 1044 produce, flows into described absorber by the mode of Drip irrigation, to recycle.
Thus, by the generator of two-layer configuration is divided into different cavity, top is as driving heat source, and bottom is as suitable afterburning thermal source, and ensure that unit normally runs, reliability is high, and security is good, and energy-conserving and environment-protective.
Particularly, when described different thermal source comprises low temperature exhaust heat thermal source and/or solar energy simultaneously, during with afterburning thermal source, described low temperature exhaust heat thermal source and/or solar energy are communicated to described low-pressure stage generator 1042 by the first heat exchange connecting pipeline 122, and described afterburning thermal source is communicated to described hiigh pressure stage generator 1044 by described second heat exchange connecting pipeline 124.
Such as: when adopting described afterburning heat source, when described lithium bromide water solution is first after described low-pressure stage generator 1042 is heated by described low-temperature heat source and to described hiigh pressure stage generator 1044, again by described afterburning heat source, to realize heating the ladder of described lithium bromide water solution.
Thus, by the ladder heating in the generator of two-layer configuration, not only achieve the cascade utilization of heat energy, improve utilization ratio, also make the heat-transfer effect of generator different piece ensure best.
Preferably, the cloth liquid mode in superposed described low pressure generator 1042 adopts Drip irrigation (such as: the spray thrower Drip irrigation adopting generator top), realizes the preferred heat exchange mode of first order heat exchange; The cloth liquid mode being arranged in the described hiigh pressure stage generator 1044 of bottom adopts full liquid to arrange all heat-transfer pipes in ie in solution submergence bottom, can strengthen heat exchange area and heat transfer intensity.
In one embodiment, between described partition structure setting up and down, liquid-blocking device 120 is also provided with.Wherein, described liquid-blocking device 120 is filled type liquid barrier, effectively can prevent bottom solution ebuillition of heated from causing flooding upper heat transfer tube, affect the heat transfer effect of generator.
In one embodiment, between the lithium bromide water solution circular flow of the generator 104 of described two-layer configuration is opened one's mouth and the lithium bromide water solution circular flow of described absorber 108 is opened one's mouth, also heat exchanger is provided with; Wherein, the dense lithium bromide water solution of high temperature of the generator outflow of described two-layer configuration, by described heat exchanger, the rare lithium bromide water solution of low temperature flowed out with described absorber 108 carries out heat exchange, to improve the temperature of the rare lithium bromide water solution of described low temperature when described circulating pump (such as: solution pump 112) enters the generator circulating-heating of described two-layer configuration.By the use of heat exchanger, the heat exchange efficiency of lithium bromide water solution circulation time can be improved, and effectively can utilize the heat of the dense lithium bromide water solution of high temperature, promote the environmental protection and energy saving of unit further.
Such as: because the rare lithium bromide water solution of lithium bromide is cooled in absorber 108, temperature is lower, in order to save the heat heating rare lithium bromide water solution, improve the heat exchange efficiency of whole unit, add a heat exchanger 110 in the unit, the rare lithium bromide water solution of low temperature that the dense lithium bromide water solution of high temperature allowing the generator 104 of two-layer configuration flow out and absorber 108 flow out carries out heat exchange, improves the temperature that rare lithium bromide water solution enters the generator 104 of two-layer configuration.
Preferably, described heat exchanger 110, comprising: plate type heat exchanger.By plate type heat exchanger, can strengthen heat exchange area and the heat transfer effect of lithium bromide water solution circulation time, reliability is high, good energy saving performance.
Through a large amount of verification experimental verifications, adopt the technical scheme of the present embodiment, for application present situation and China's industrial expansion present situation of current lithium bromide absorption-type machine unit, in order to make full use of solar energy and cryogenic waste heat resource, expand the application of lithium bromide absorption-type machine unit.Adopt the program, not only make low-temperature waste heat, waste water and solar energy be used in lithium bromide absorption-type machine unit, saved the application of non-renewable energy resources and other high-grade thermals source, also expanded the scope of application of lithium bromide absorption-type machine unit.
According to embodiments of the invention, additionally provide the control method of a kind of two-stage type absorption refrigeration unit corresponding to two-stage type absorption refrigeration unit.This control method comprises: use above-described unit, controls to adjust it according to different actual conditions.
Wherein, when described different thermal source comprises low temperature exhaust heat thermal source and/or solar energy simultaneously, during with afterburning thermal source, and when low temperature exhaust heat thermal source and/or solar energy meet unit demand, the afterburning thermal source of closing hiigh pressure stage generator and being connected with hiigh pressure stage generator.
Wherein, when described different thermal source comprises low temperature exhaust heat thermal source and/or solar energy simultaneously, during with afterburning thermal source, and when described low temperature exhaust heat thermal source and/or solar energy input shortage of heat to drive described unit normally to run, open described afterburning thermal source, for described unit increases additional heat, ensure that described unit normally runs.
Such as: use above-described unit, when unit operation, first described low-temperature heat source is utilized to input heat, lithium bromide water solution is heated, and low-temperature heat source input heat described in Real-Time Monitoring is to the driving situation of described unit, with when described low-temperature heat source input shortage of heat is to drive described unit normally to run, open described afterburning thermal source, adopt described afterburning thermal source to be that described unit increases additional heat simultaneously, ensure that described unit normally runs.
In one example in which, this control method, may be used for air-conditioning system, for application present situation and China's industrial expansion present situation of current lithium bromide absorption-type machine unit, in order to make full use of solar energy and cryogenic waste heat resource, expand the application of lithium bromide absorption-type machine unit.
Such as: use above-described two-stage type absorption refrigeration unit (such as: the lithium bromide two-stage type absorption refrigeration unit being thermal source with solar energy and low temperature exhaust heat), low temperature exhaust heat (such as: low temperature waste gas, low-temperature wastewater etc.) and solar energy resources is utilized to heat lithium-bromide solution, by generator is divided into different cavity, the suitable afterburning in bottom, ensures that unit normally runs.
Such as: example shown in Figure 2, the unit recycle scheme of this air-conditioning system, technical characteristics is as follows:
(1) unit adopts solar energy or low-temperature waste heat as thermal source.Consider that the heat source temperature when adopting is lower, or by weather effect in Solar use process, when causing thermal source input shortage of heat normally to run with drive train, afterburning thermal source is also furnished with in generator, afterburning can adopt fuel oil, combustion gas, high-temperature flue gas etc. as thermal source, for unit adds extra heat source, thus ensure the normal operation of unit.
(2) generator adopts upper and lower two parts to arrange, top (such as: low-pressure stage generator 1042) cloth liquid mode adopts Drip irrigation, bottom (such as: hiigh pressure stage generator 1044) cloth liquid adopts full liquid to arrange, ie in solution (such as: lithium bromide water solution) submergence bottom (such as: hiigh pressure stage generator 1044) all heat-transfer pipes.When unit utilizes afterburning thermal source, first solution heated by low-temperature heat source top (such as: low-pressure stage generator 1042), heated by high temperature heat source again to bottom (such as: hiigh pressure stage generator 1044) time, not only achieve the cascade utilization of heat energy, improve utilization ratio, also make the heat-transfer effect of generator 104 different piece ensure best.
(3) the liquid-blocking device 120 of intermediate arrangement is set at generator about 104 two parts, liquid-blocking device 120 can adopt filled type liquid barrier, prevent bottom (such as: hiigh pressure stage generator 1044) solution ebuillition of heated from causing flooding top (such as: low-pressure stage generator 1042) heat-transfer pipe, affect the heat transfer effect of generator 104.
The process realized due to the control method of the present embodiment and function are substantially corresponding to the embodiment of aforementioned unit, principle and example, therefore not detailed part in the description of the present embodiment, see the related description in previous embodiment, can not repeat at this.
Through a large amount of verification experimental verifications, adopt technical scheme of the present invention, have employed the driving as lithium bromide absorption-type machine unit of low temperature exhaust heat thermal source and solar energy; Generator adopts two-stage to arrange, and adopts different heat sources to carry out heat supply respectively, has saved the application of non-renewable energy resources and other high-grade thermals source, has also expanded the range of application of lithium bromide absorption-type machine unit in low temperature exhaust heat field and field of solar energy.
Also it should be noted that, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, commodity or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, commodity or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, commodity or the equipment comprising described key element and also there is other identical element.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The foregoing is only embodiments of the invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within right of the present invention.
Claims (16)
1. a two-stage type absorption refrigeration unit, is characterized in that: comprise condenser (102), generator (104), evaporimeter (106) and absorber (108); Wherein,
Described generator (104) is the two-layer configuration comprising first order generator and second level generator, and described first order generator and described second level generator adopt different thermals source to carry out heat supply to described unit respectively; And described two-layer configuration is partition structure setting up and down, wherein said first order generator is positioned at top, is low-pressure stage generator (1042); Described second level generator is positioned at bottom, is hiigh pressure stage generator (1044).
2. two-stage type absorption refrigeration unit according to claim 1, is characterized in that: adopt different thermals source to carry out heat supply to described unit and comprise: utilize low temperature exhaust heat thermal source and/or solar energy to provide driving heat for described unit.
3. two-stage type absorption refrigeration unit according to claim 2, is characterized in that: described low temperature exhaust heat thermal source and/or solar energy are communicated to one of them in described first order generator and described second level generator by the first heat exchange connecting pipeline (122).
4. the two-stage type absorption refrigeration unit according to Claims 2 or 3, is characterized in that: adopt different thermals source to carry out heat supply to described unit and also comprise: utilize afterburning thermal source to provide supplying heat for described unit.
5. two-stage type absorption refrigeration unit according to claim 4, is characterized in that: described afterburning thermal source is communicated to the another one in described first order generator and second level generator by the second heat exchange connecting pipeline (124).
6. two-stage type absorption refrigeration unit according to claim 1, it is characterized in that: when described different thermal source comprises low temperature exhaust heat thermal source and/or solar energy simultaneously, during with afterburning thermal source, described low temperature exhaust heat thermal source and/or solar energy are communicated to described low-pressure stage generator (1042) by the first heat exchange connecting pipeline (122), and described afterburning thermal source is communicated to described hiigh pressure stage generator (1044) by described second heat exchange connecting pipeline (124).
7. according to the two-stage type absorption refrigeration unit one of claim 1-6 Suo Shu, it is characterized in that: the cloth liquid mode in superposed described low pressure generator (1042) adopts Drip irrigation, the cloth liquid mode being arranged in the described hiigh pressure stage generator (1044) of bottom adopts full liquid to arrange.
8. according to the two-stage type absorption refrigeration unit one of claim 1-7 Suo Shu, it is characterized in that: between described partition structure setting up and down, be also provided with liquid-blocking device.
9. two-stage type absorption refrigeration unit according to claim 8, is characterized in that: described liquid-blocking device is filled type liquid barrier.
10. according to the two-stage type absorption refrigeration unit one of claim 2-6 Suo Shu, it is characterized in that: when described different thermal source comprises described low temperature exhaust heat thermal source, described low temperature exhaust heat thermal source is low temperature waste gas and/or low temperature exhaust heat water.
11. two-stage type absorption refrigeration units according to claim 10, is characterized in that: the temperature of described low temperature exhaust heat water is the low temperature exhaust heat water of 70-90 DEG C.
12., according to the two-stage type absorption refrigeration unit one of claim 4-6 Suo Shu, is characterized in that: described afterburning thermal source is at least one in fuel oil, combustion gas, high-temperature flue gas.
13., according to the two-stage type absorption refrigeration unit one of claim 1-12 Suo Shu, is characterized in that: the absorbent of described absorption installation is lithium bromide.
The control method of 14. 1 kinds of two-stage type absorption refrigeration units, is characterized in that, comprising: use arbitrary described unit in claim 1-13, control to adjust according to different actual conditions to it.
15. control methods according to claim 14, it is characterized in that: when described different thermal source comprises low temperature exhaust heat thermal source and/or solar energy simultaneously, during with afterburning thermal source, and when low temperature exhaust heat thermal source and/or solar energy meet unit demand, the afterburning thermal source of closing hiigh pressure stage generator and being connected with hiigh pressure stage generator.
16. control methods according to claim 14, it is characterized in that: when described different thermal source comprises low temperature exhaust heat thermal source and/or solar energy simultaneously, during with afterburning thermal source, and when described low temperature exhaust heat thermal source and/or solar energy input shortage of heat to drive described unit normally to run, open described afterburning thermal source, for described unit increases additional heat, ensure that described unit normally runs.
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| CN105865075A (en) * | 2016-06-07 | 2016-08-17 | 松下制冷（大连）有限公司 | Low-temperature hot water large-temperature-difference lithium bromide absorbing type refrigerating unit |
| CN107806719A (en) * | 2017-11-17 | 2018-03-16 | 珠海格力电器股份有限公司 | Refrigeration unit and there is its refrigeration system |
| CN109466409A (en) * | 2018-11-30 | 2019-03-15 | 淮阴工学院 | Multipotency source generator and the aquatic product transportation vehicle for installing the generator |
| CN109827421A (en) * | 2019-03-18 | 2019-05-31 | 青岛创客机械设备制造有限公司 | A kind of superhigh temperature industrial heat pump drying unit |
| CN113669956A (en) * | 2021-08-02 | 2021-11-19 | 北京工业大学 | Adjustable generator and control method thereof |
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| CN113669956A (en) * | 2021-08-02 | 2021-11-19 | 北京工业大学 | Adjustable generator and control method thereof |
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