CN101532751B - Built-in sorbent floating head type adsorbent bed refrigeration unit - Google Patents
Built-in sorbent floating head type adsorbent bed refrigeration unit Download PDFInfo
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- CN101532751B CN101532751B CN200910064661XA CN200910064661A CN101532751B CN 101532751 B CN101532751 B CN 101532751B CN 200910064661X A CN200910064661X A CN 200910064661XA CN 200910064661 A CN200910064661 A CN 200910064661A CN 101532751 B CN101532751 B CN 101532751B
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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
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- 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]
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Abstract
The invention provides a built-in sorbent floating head type adsorbent bed refrigeration unit. The refrigeration unit comprises an adsorbent bed, an insulation connective closed body, a condenser, an adiathermance connective closed body and an evaporator, wherein the adsorbent bed is formed by at least two outer fin tubes; the sorbent is solidified on the inner wall of the outer fin tubes of the adsorbent bed; a mass transfer channel is arranged in the center of the outer fin tubes of the adsorbent bed; the condenser is formed by at least two outer fin tubes; the evaporator is formed by at least one outer fin tube; upper ends of the outer fin tubes of the adsorbent be are closed; lower ends of the outer fin tubes of the adsorbent bed are communicated with the upper end of the insulation connective closed body; the lower end of the insulation connective closed body is communicated with upper ends of the outer fin tubes of the condenser; lower ends of the outer fin tubes of the condenser are communicated with the upper end of the adiathermance connective closed body; the lower end of the adiathermance connective closed body is communicated with the upper end of the outer fin tube of the evaporator; and the lower end of the outer fin tube of the evaporator is closed. The refrigeration unit has scientific structure design, strong capability of adapting to reversed heat stress, does not leak in operation, and has prominent adsorbent refrigeration effect.
Description
Technical field
The present invention relates to a kind of adsorption refrigeration unit, specifically, relate to a kind of built-in sorbent floating head type adsorbent bed refrigeration unit, belong to the absorption refrigeration technical field.
Background technology
At present; The absorption refrigeration technology becomes people's research emphasis day by day, but there is two large problems in this technology: 1, when absorbing refrigeration system is worked, adsorption refrigeration unit is by alternately heating and cooling; Because adsorption refrigeration unit heat exchanger tube (face) is inconsistent with the temperature and the material of housing; And between them, produce the thermal stress of alternation, the connection of destructible adsorption refrigeration unit tube plate, and adsorption refrigeration unit is leaked; Can know by experiment, inner even a small amount of incoagulable gas advances people's adsorption refrigeration unit, will make that also the refrigeration performance of absorbing refrigeration system declines to a great extent; More than expose adsorption refrigeration unit and still had structural design not science, incomplete problem; 2, because adsorbent need be through replacing heating or cooling off the function that realizes mechanical compressor; Thereby the refrigeration of single adsorption refrigeration unit or to heat be discontinuous is for improving efficiency of utilization and continuous cooling or heating; The two or more adsorption refrigeration units of normal employing are used; Alternately heating or cooling, and realize that through the complicated pipelines valve system backheat returns matter is with approximate continuous ground refrigeration or heat; Though Chinese scholars has proposed numerous technical schemes, its pipe valve system complex is prone to leakage, and heat exchange efficiency is low, so, realize that really still there is certain difficulty in continuous absorption refrigeration.
Adopt of existing adsorption refrigeration unit comprises the three stage structure of adsorbent bed, condenser and evaporimeter more, though can realize continuous cooling, because adsorption refrigeration unit adopts the individual tubes form, this makes in use, finds to exist following problem:
1, adsorbent bed inner transmission matter passage draw ratio is excessive; When cycle period more in short-term; Make and to bring into play whole effects because of refrigerant vapour on every side is few away from the adsorbent of import; And for letting this place's adsorbent performance all do the time spent, will prolong again circulation timei, but this will cause the refrigeration work consumption of adsorption refrigeration unit and COP to descend;
2, be all condensations when guaranteeing refrigerant vapour through adsorbent bed, then the length of condenser can not be too short; Because the adsorbent bed condenser adopts and the same diameter of adsorbent bed, then condenser inner space volume might surpass an optimal volume; Excessive condensation vessel volume will influence the refrigeration performance of system; Because the refrigerant vapour pressure when system works in the unit is periodically variable; Then in condenser, will be detained the part refrigerant vapour, this part cold-producing medium does not only participate in freezing but also the adsorption capacity that will consume the part adsorbent;
3, because adsorbent bed is the bigger elongated pipe of draw ratio, when the selected adsorbent filling thickness, there are some problems; If bore is fixed, adopting the thicker adsorbent of thickness then will cause heat transfer distances to increase thermal resistance increases, and resistance to mass tranfer increases, though through adopting inner fin to increase heat transfer area, can't reduce resistance to mass tranfer; Reduce heat transfer resistance though adopt the adsorbent of thinner thickness to shorten heat transfer distances, will cause the metal specific heat appearance of adsorbent bed bigger, and the adsorbent bed volume inside is bigger, causes part refrigerant vapour " delay ", drops to its absorption refrigeration performance.
In order to overcome the above problems, people are seeking a kind of desirable technical solution always.
Summary of the invention
The objective of the invention is deficiency, thereby thermal stress, durable, the leak free built-in sorbent floating head type adsorbent bed refrigeration unit of a kind of design science, adaptation alternation are provided to prior art.
To achieve these goals, the present invention provides a kind of built-in sorbent floating head type adsorbent bed refrigeration unit, comprises adsorbent bed, condenser and evaporimeter, and this unit also comprises heat insulation connection obturator and the adiabatic obturator that is communicated with; Said adsorbent bed is made up of at least two external finned tubes, and the inside pipe wall of said adsorbent bed external finned tube is solidified with one deck adsorbent, and the external finned tube center of said adsorbent bed is provided with mass transfer channel; Said condenser is made up of at least two external finned tubes, and said evaporimeter is made up of at least one external finned tube; Wherein, The external finned tube upper end of said adsorbent bed is airtight; The external finned tube lower end of said adsorbent bed is communicated with the upper end of said heat insulation connection obturator, and the lower end of said heat insulation connection obturator is communicated with the external finned tube upper end of said condenser, and the external finned tube lower end of said condenser is communicated with the said adiabatic upper end that is communicated with obturator; The said adiabatic lower end that is communicated with obturator is communicated with the external finned tube upper end of said evaporimeter, and the external finned tube lower end of said evaporimeter is airtight.
Based on above-mentioned, said heat insulation connection obturator is that the middle part has the tubular obturator that shrinks changeover portion.
Based on above-mentioned, the said adiabatic obturator that is communicated with is that the middle part has the tubular obturator that shrinks changeover portion.
Based on above-mentioned, said adsorbent bed is made up of six roots of sensation external finned tube, and the said adsorbent bed external finned tube of the six roots of sensation is uniformly distributed on the same circle; Said adsorbent bed external finned tube length is smaller or equal to 30cm, said adsorbent bed external finned tube diameter 15mm～30mm; The adsorbent thickness that said adsorbent bed external finned tube inside pipe wall solidifies is 2mm～6mm.
Based on above-mentioned, said condenser is made up of four external finned tubes.
Based on above-mentioned, said evaporimeter is made up of four external finned tubes, and said external finned tube inwall is lined with one deck capillary materials.
The relative prior art of the present invention has outstanding substantive distinguishing features and obvious improvement, specifically, and this built-in sorbent floating head type adsorbent bed refrigeration unit scientific structure design, perfect; Have the ability of very strong adaptation alternating thermal stress, durable, nothing in service is leaked; Ensured the stable operation of system; Heat exchange efficiency is high, and absorption refrigeration is remarkably productive, has very strong industrial application value.
Description of drawings
Fig. 1 is the structural representation of built-in sorbent floating head type adsorbent bed refrigeration unit according to the invention;
Fig. 2 is the structural representation of absorption continuous refrigeration system according to the invention.
The specific embodiment
Through the specific embodiment, technical scheme of the present invention is done further detailed description below.
For reducing the suffered thermal stress of adsorbent bed tube sheet, improving system reliability; The technological merit of comprehensive each adsorption refrigeration unit of the present invention; A kind of novel built-in sorbent floating head type adsorbent bed refrigeration unit structure is proposed; As shown in Figure 1: a kind of built-in sorbent floating head type adsorbent bed refrigeration unit 10, said built-in sorbent floating head type adsorbent bed refrigeration unit 10 comprise adsorbent bed 12, heat insulation connection obturator 17, condenser 13, adiabatic obturator 19 and the evaporimeter 14 of being communicated with that is communicated with successively;
Said adsorbent bed 12 is made up of the external finned tube of six roots of sensation external diameter 20mm, and the said external finned tube of the six roots of sensation is uniformly distributed on the same circle;
The adsorbent of the external finned tube internal face adhesive solidification of said adsorbent bed; Perhaps; Adopt adsorbent in bulk, but will install metallic sieve additional with fixing adsorbent in bulk, the adsorbent thickness that said external finned tube inside pipe wall solidifies is 2mm～6mm; Adsorbent is solidificated in the external finned tube inwall, makes heat transfer area increase mass transfer area and reduces; Be provided with the mass transfer channel of cold-producing medium at adsorbent bed external finned tube center;
The external finned tube length of said adsorbent bed 12 is 30cm, compares with the length 400～600mm of traditional refrigerator pipes adsorption section, has shortened about half, makes cold-producing medium in the inner mass transfer reduced distances of adsorbent bed, is beneficial to heat exchange and improves heat exchanger effectiveness; Increased the quantity of adsorption tube, made draw ratio reduce greatly, made the inner mass transfer channel area of adsorbent bed increase, be beneficial to heat exchange and improve heat exchanger effectiveness; And adsorbent bed one end fixes, and the other end is free, can effectively reduce the thermal stress on the adsorbent bed tube sheet;
Four external finned tubes that said condenser 13 is arranged by being square constitute, and per two external finned tubes form one group, are beneficial to heat exchange;
Said evaporimeter 14 is made up of an external finned tube, and said external finned tube inwall is lined with one deck capillary materials, the abundant infiltration of inside pipe wall during with the assurance evaporation;
Wherein, The metal tube upper end of said adsorbent bed 12 is airtight; The metal tube lower end of said adsorbent bed 12 is communicated with the upper end of said heat insulation connection obturator 17, and the lower end of said heat insulation connection obturator 17 is communicated with the external finned tube upper end of said condenser 13, and the external finned tube lower end of said condenser 13 is communicated with the said adiabatic upper end that is communicated with obturator 19; The said adiabatic lower end that is communicated with obturator 19 is communicated with the external finned tube upper end of said evaporimeter 14, and the external finned tube lower end of said evaporimeter 14 is airtight.
Based on above-mentioned, said heat insulation connection obturator 17 is provided with heat-insulating material with the said adiabatic inwall that is communicated with obturator 19; Between adsorbent bed 12, condenser 13 and evaporimeter 14, the adiabatic section is set; Be said heat insulation connection obturator 17 and the said adiabatic obturator 19 that is communicated with; Help overcoming heat (cold) loss in the running, and condenser separates with evaporimeter, for condition has been created in the realization continuous cooling;
Said heat insulation connection obturator 17 is that the middle part has the tubular obturator that shrinks changeover portion 18, and the said adiabatic obturator 19 that is communicated with is that the middle part has the tubular obturator that shrinks changeover portion 20; Contraction changeover portion 18 is set at said heat insulation connection obturator 17 middle parts; At said adiabatic obturator 19 middle parts that are communicated with contraction changeover portion 20 is set; Be for to avoid occurring between parts and the parts the discontinuous situation of sudden contraction or sudden expansion, simultaneously, all can serve as liquid trap and use;
This built-in sorbent floating head type adsorbent bed refrigeration unit operation principle is following: heat or cold air flow through outside adsorbent bed, and adsorbent is heated or cools off, and replenish desorption heat simultaneously or take heat of adsorption out of; During desorption, the steam that is flowed out by adsorbent bed cool off in condenser and condensation, and heat is taken away and discharged to environment through the cooling fluid of the condenser of flowing through, and the liquid process converging transition under the cooling compiles, and through the adiabatic section, flows in the evaporimeter; During absorption, the refrigerant liquid in the evaporimeter evaporates because of pressure reduces, and absorbs the evaporimeter heat of chilled water (gas) on every side, realizes refrigeration, and refrigerant vapour advances people's adsorbent bed through condenser.
This refrigeration unit has combined the advantage of heat pipe and floating head heat exchanger, does not have vacuum valve, and tube sheet junction thermal stress is little, and reliability is improved, and owing to adsorbent bed, condenser, evaporimeter can design respectively, it can both be worked under optimum state simultaneously; It is the absorbing refrigeration system of cold and hot medium that this built-in sorbent floating head type adsorbent bed refrigeration unit is fit to high-temperature gas.
In order to prove absolutely built-in sorbent floating head type adsorbent bed refrigeration unit of the present invention, provide a kind of absorption continuous refrigeration system that adopts this unit below:
As shown in Figure 2, adopt 4 novel built-in sorbent floating head type adsorbent bed refrigeration units, form an absorption continuous refrigeration system; This system comprise two cover absorption refrigeration heat exchangers (A, B), an air blower 2; A thermal source blower fan 3; 9, one circulating pumps 8 of 4, one three-way switch valves of a four-way switching valve and one group of refrigeration coil 7;
Said absorption refrigeration heat exchanger A comprises two groups of above-described built-in sorbent floating head type adsorbent bed refrigeration units 10, adsorbent bed heat exchange cover 1 and refrigerant circulating box 5; Wherein, The adsorbent bed of two groups of said built-in sorbent floating head type adsorbent bed refrigeration units 10 all is arranged in the said adsorbent bed heat exchange cover 1, and the evaporimeter of two groups of said built-in sorbent floating head type adsorbent bed refrigeration units 10 all is arranged in the said refrigerant circulating box 5;
Said absorption refrigeration heat exchanger B comprises two groups of above-described built-in sorbent floating head type adsorbent bed refrigeration units 10, adsorbent bed heat exchange cover 11 and refrigerant circulating box 15; Wherein, The adsorbent bed of two groups of said built-in sorbent floating head type adsorbent bed refrigeration units 10 all is arranged in the said adsorbent bed heat exchange cover 11, and the evaporimeter of two groups of said built-in sorbent floating head type adsorbent bed refrigeration units 10 all is arranged in the said refrigerant circulating box 15;
Wherein, Said air blower 2 and said thermal source blower fan 3 are communicated with two imports of said four-way switching valve 4 respectively, and two outlets of said four-way switching valve 4 are communicated with the import of the two said adsorbent bed heat exchange covers of cover (1,11) respectively; The said refrigerant circulating box (5 of two covers; 15) a end is communicated with an end of said refrigeration coil 7 respectively, and the other end of said refrigeration coil 7 is communicated with the import of said circulating pump 8, and the outlet of said circulating pump 8 is communicated with the import of said three-way switch valve 9; Two outlets of said three-way switch valve 9 are communicated with the other end of the two said refrigerant circulating boxes of cover (5,15) respectively.
Based on above-mentioned, (A, condenser B) are respectively arranged with condensation fan (6,16) to corresponding said absorption refrigeration heat exchanger, are beneficial to condensation; Need to prove that in other embodiments, (A, condenser B) can share a condensation fan to said absorption refrigeration heat exchanger.
This system has controlled cold and hot carrier and clocklike, has alternately passed through each adsorbent bed, and then realized continuous absorption refrigeration through four-way switching valve and three-way switch valve; Condensation segment is not then considered alternately cooling or heating problems, and four pipes of condensation segment are all the time with surrounding air or water (25～45 ℃) cooling; Evaporator section is to be in all the time in the middle of chilled water or the air equally, and system can realize continuous cooling like this.
This absorption continuous refrigeration system operation principle is following: when system moves, adopt two cover absorption refrigeration heat exchangers, promptly two cover absorption refrigeration heat exchangers are replacing absorption and desorption; When absorption refrigeration heat exchanger A desorption; Transfer valve switches to high temperature fluid the adsorbent bed of absorption refrigeration heat exchanger A; High temperature fluid gets into adsorbent bed, and with the adsorbent bed desorption by heating, the refrigerant vapour that desorption goes out is emitted gasification latent heat through condenser; Liquefy cold-producing medium, liquid refrigerant are collected at the evaporimeter place of refrigeration unit; When absorption refrigeration heat exchanger A carries out desorption; Absorption refrigeration heat exchanger B adsorbs, and blower fan is delivered to absorption refrigeration heat exchanger B through transfer valve with new wind, the adsorbent bed cooling absorption of absorption refrigeration heat exchanger B; The interior steam pressure of cold pipe this moment descends; Liquid refrigerant start vaporizer in the built-in sorbent floating head type adsorbent bed refrigeration unit evaporimeter absorbs the heat that refrigerant is passed to, and refrigerant absorbs the heat refrigeration through refrigeration coil; Need to prove; Its desorption temperature was different when absorption refrigeration used different refrigerants with adsorbent, just can desorption such as silica gel 60 degree, and can desorption more than active carbon 100 is spent; Molecular sieve almost wants 200 degree can desorption; And during the cold-producing medium water, cryogenic temperature and can ice making with methyl alcohol, ammonia etc. about 10 degree.
A kind of absorption continuous cooling method may further comprise the steps:
Behind step 2, the elapsed time T, switch four-way switching valve and three-way switch valve, make air and thermal source gas get into two cover absorption refrigeration heat exchanger (B respectively; A), absorption refrigeration heat exchanger B adsorbs, and the refrigerant liquid in the evaporimeter evaporates because of pressure reduces; Absorb the heat of refrigerant around the evaporimeter, refrigerant temperature reduces, and through the refrigeration coil heat absorption that circulates; And then realize refrigeration, simultaneously, absorption refrigeration heat exchanger A carries out desorption; The steam that is flowed out by adsorbent bed cool off in condenser and condensation, and heat is taken away and discharged to environment through the cooling fluid of the condenser of flowing through, and the liquid process convergent changeover portion under the cooling compiles; Through the adiabatic section, flow in the evaporimeter, adsorb in order to next step;
Behind step 3, the elapsed time T, switch four-way switching valve and three-way switch valve once more, circulation according to this is to realize the absorption continuous cooling.
Should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not to its restriction; Although with reference to preferred embodiment the present invention has been carried out detailed explanation, the those of ordinary skill in affiliated field is to be understood that: still can specific embodiments of the invention make amendment or the part technical characterictic is equal to replacement; And not breaking away from the spirit of technical scheme of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (8)
1. a built-in sorbent floating head type adsorbent bed refrigeration unit comprises adsorbent bed, condenser and evaporimeter, it is characterized in that: this unit also comprises heat insulation connection obturator and the adiabatic obturator that is communicated with; Said adsorbent bed is made up of at least two external finned tubes, and the inside pipe wall of said adsorbent bed external finned tube is solidified with one deck adsorbent, and the external finned tube center of said adsorbent bed is provided with mass transfer channel; Said condenser is made up of at least two external finned tubes, and said evaporimeter is made up of at least one external finned tube; Wherein, The external finned tube upper end of said adsorbent bed is airtight; The external finned tube lower end of said adsorbent bed is communicated with the upper end of said heat insulation connection obturator, and the lower end of said heat insulation connection obturator is communicated with the external finned tube upper end of said condenser, and the external finned tube lower end of said condenser is communicated with the said adiabatic upper end that is communicated with obturator; The said adiabatic lower end that is communicated with obturator is communicated with the external finned tube upper end of said evaporimeter, and the external finned tube lower end of said evaporimeter is airtight.
2. built-in sorbent floating head type adsorbent bed refrigeration unit according to claim 1 is characterized in that: said heat insulation connection obturator is that the middle part has the tubular obturator that shrinks changeover portion.
3. built-in sorbent floating head type adsorbent bed refrigeration unit according to claim 1 is characterized in that: the said adiabatic obturator that is communicated with is that the middle part has the tubular obturator that shrinks changeover portion.
4. built-in sorbent floating head type adsorbent bed refrigeration unit according to claim 1 is characterized in that: said adsorbent bed is made up of six roots of sensation external finned tube, and the said adsorbent bed external finned tube of the six roots of sensation is uniformly distributed on the same circle.
5. according to claim 1 or 4 described built-in sorbent floating head type adsorbent bed refrigeration units, it is characterized in that: said adsorbent bed external finned tube length is smaller or equal to 30cm, said adsorbent bed external finned tube diameter 15mm～30mm.
6. built-in sorbent floating head type adsorbent bed refrigeration unit according to claim 5 is characterized in that: the adsorbent thickness that said adsorbent bed external finned tube inside pipe wall solidifies is 2mm～6mm.
7. built-in sorbent floating head type adsorbent bed refrigeration unit according to claim 1 is characterized in that: said condenser is made up of four external finned tubes.
8. built-in sorbent floating head type adsorbent bed refrigeration unit according to claim 1 is characterized in that: said evaporimeter is made up of four external finned tubes, and the external finned tube inwall of said evaporimeter is lined with one deck capillary materials.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910064661XA CN101532751B (en) | 2009-04-16 | 2009-04-16 | Built-in sorbent floating head type adsorbent bed refrigeration unit |
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| CN200910064661XA CN101532751B (en) | 2009-04-16 | 2009-04-16 | Built-in sorbent floating head type adsorbent bed refrigeration unit |
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| CN101532751A CN101532751A (en) | 2009-09-16 |
| CN101532751B true CN101532751B (en) | 2012-06-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103438606B (en) * | 2013-08-13 | 2015-06-03 | 上海海事大学 | Adsorption-type waste heat recovery plate type refrigerator |
| CN105771542A (en) * | 2016-04-21 | 2016-07-20 | 江苏达克罗涂装技术有限公司 | Curing oven exhaust gas treatment device |
| CN114797772B (en) * | 2022-04-02 | 2022-11-22 | 中国科学院理化技术研究所 | Adsorption film, preparation method thereof and electric heating adsorption bed for low-temperature system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2459591Y (en) * | 2001-01-09 | 2001-11-14 | 上海交通大学 | Reheating solidifying adsorption bed |
| CN101135508A (en) * | 2007-08-16 | 2008-03-05 | 青岛大学 | Solid body adsorb unit pipe and combined adsorb refrigerating device thereof |
| CN101158519A (en) * | 2007-11-21 | 2008-04-09 | 上海理工大学 | Unit type cold pipe adsorption refrigerating device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2459591Y (en) * | 2001-01-09 | 2001-11-14 | 上海交通大学 | Reheating solidifying adsorption bed |
| CN101135508A (en) * | 2007-08-16 | 2008-03-05 | 青岛大学 | Solid body adsorb unit pipe and combined adsorb refrigerating device thereof |
| CN101158519A (en) * | 2007-11-21 | 2008-04-09 | 上海理工大学 | Unit type cold pipe adsorption refrigerating device |
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