SE516970C2 - Air drying and cooling process - Google Patents

Air drying and cooling process

Info

Publication number
SE516970C2
SE516970C2 SE9401581A SE9401581A SE516970C2 SE 516970 C2 SE516970 C2 SE 516970C2 SE 9401581 A SE9401581 A SE 9401581A SE 9401581 A SE9401581 A SE 9401581A SE 516970 C2 SE516970 C2 SE 516970C2
Authority
SE
Sweden
Prior art keywords
air
sorption
regeneration
cooled
cooling
Prior art date
Application number
SE9401581A
Other languages
Swedish (sv)
Other versions
SE9401581L (en
SE9401581D0 (en
Inventor
Gunnar Ankarstig
Original Assignee
D S T Sorptionsteknik Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by D S T Sorptionsteknik Ab filed Critical D S T Sorptionsteknik Ab
Priority to SE9401581A priority Critical patent/SE516970C2/en
Publication of SE9401581D0 publication Critical patent/SE9401581D0/en
Publication of SE9401581L publication Critical patent/SE9401581L/en
Publication of SE516970C2 publication Critical patent/SE516970C2/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1411Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant
    • F24F3/1423Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant with a moving bed of solid desiccants, e.g. a rotary wheel supporting solid desiccants
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00Devices or apparatus used for air treatment
    • F24F2203/10Rotary wheel
    • F24F2203/1032Desiccant wheel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00Devices or apparatus used for air treatment
    • F24F2203/10Rotary wheel
    • F24F2203/1056Rotary wheel comprising a reheater
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00Devices or apparatus used for air treatment
    • F24F2203/10Rotary wheel
    • F24F2203/1072Rotary wheel comprising two rotors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00Devices or apparatus used for air treatment
    • F24F2203/10Rotary wheel
    • F24F2203/1084Rotary wheel comprising two flow rotor segments

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Gases (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

A process for drying and cooling air comprises the use of a fan to blow process air into a first sorption rotor where it is dehumidified. The air is then cooled in a cold water cell and then dehumidification and cooling are repeated in a second sorption rotor, after which the dehumidified and cooled air is returned to the room from where it was extracted. At the same time, regenerated air is forced to lose some of its moisture and increase in temperature as it passes through the second sorption rotor. This air is then passed through a hot water cell and then the hot and dry air is used to regenerate the first sorption rotor, from where it is expelled by the fan. Also claimed is equipment used to carry out this process.

Description

51-6 970 gram. Fördelarna med anošdningen i figur 1 äro låg regenereringgn temperatur till följd ay_f§3tgrkning av regenereringsluften, energi- återvinning, eftersom den i dessa processer erforderliga befuktninger sker medelst sorptionsrotor 4 och därvid värmer och avfuktar regene_ reringsluften, ingen risk för fuktöverföring såsom vid kylning med roterande värmeväxlare och man utnyttfiar lättillgängliga och billiga energiformer. Olägenneter, som kunna uppkomma i anordningen i figur1, äro dels att den kalla luftens temperatur och fukt äro beroende av inkommande regenereringslufts relativa fukt, vilket är åtgärdat i figur 2, dels att det för vissa installationer är omöjligt att an- vända stadsvatten till kallvattenbatteri 5, vilket har åtgändats i figur 3. I figur 2 ledes såsom i figur 1 det Iftflödeæl, som skall avfuktas och kylas, genom en sorptionsrotor 2 och avfuktss samt där- efter sänkas temperaturen vid passage genom t.ex. ett kallvattenbat- terf.5. Det härigenom avfuktade och kylda luftflödet ledes:sedan ge- nom en sorptionsrotor 4, där luftens temperatur sänkas ytterligare samtidigt som luften fuktas uppytill normalt fuktinnehåll. Ett andra luftflöde i form av regenereringsluft II föres genom ett evaporamivt befuktarorgan Zt som fuktar upp luften till den relativa luftfuktig- het, som man önskar i den kylda luften, varefter regenersringsluften II ledes genom en sorptionsrotor 4, där luften avfuktas samtidigt som temperaturen stiger, varpå regenereringsluften föres genom ett värmebatteri, t.ex. ett varmvattenbatteri 3. Slutligen regeneronar- den varma och torkade regenereringsluften sorptionsrotor 2 och lades ut med fläktorgan 1. Luftbehandling framgår av bifogat IX-diagram. 51-6 970 grams. The advantages of the device in Figure 1 are low regeneration and temperature due to defrosting of the regeneration air, energy recovery, since the humidification required in these processes takes place by means of sorption rotor 4 and thereby heats and dehumidifies the regeneration air, no risk of moisture transfer with cooling heat exchangers and easily accessible and inexpensive forms of energy are used. Disadvantages which may arise in the device in Figure 1 are partly that the temperature and humidity of the cold air are dependent on the relative humidity of the incoming regeneration air, which is remedied in Figure 2, and partly that for some installations it is impossible to use city water for cold water coil. , which has been remedied in figure 3. In figure 2, as in figure 1, the Iftflödeæl, which is to be dehumidified and cooled, is led through a sorption rotor 2 and dehumidified and then the temperature is lowered during passage through e.g. a cold water battery.5. The thereby dehumidified and cooled air flow is led: then through a sorption rotor 4, where the air temperature is further lowered at the same time as the air is humidified above the normal moisture content. A second air flow in the form of regeneration air II is passed through an evaporative humidifier Zt which humidifies the air to the relative humidity desired in the cooled air, after which the regeneration ring air II is passed through a sorption rotor 4, where the air is dehumidified while the temperature rises, whereupon the regeneration air is passed through a heating coil, e.g. a hot water battery 3. Finally, the regenerated hot and dried regeneration air sorption rotor 2 and was laid out with fan means 1. Air treatment is shown in the attached IX diagram.

Med det evaporativa luftbefuktarorganet 7 kan man med tillgång till kallvatten, såsom normalt stadsvatten ellen sjövatten och varmvatten av temperaturen 700-80°C uppnå en komplett luftkonditionering;för* flertalet av installationsfall. Fördelen med denna befuktning är, att risk för bakterietillväxt i processluften elimineras medelst den indirekta befuktningen genom sorptionsrotorn. I figur 3 ledas såsom i figur 1 det luftflöde I, som skall avfuktas och kylas, genom en sorptiomsrotor 2 och avger där fukt och föres sedan till ett kallvat- tenbatteri 5, som får sitt vatten från den evaporativa kylningen i organ 7 och därefter lades luften genom en sorptionsrotor 4, där luftens temperatur sänkas ytterligare samtidigt som luften åter be- fuktas. Ett andrarluftflöde i form av regenereringsluft II föres ge- nom det evaporativa befuktarorganet 7, där luften evaporativt befuk- tas, varpå luften ledes genom en sorptionsrotor 4, där luften avfuk- tas samtidigt som temperaturen stiger, varefter regenereringsluften II värmes i ett varmvattenbatteri 3. Den nu avfuktade och värmde re- s1e 9103 genereringsluften regenererar slutligen sorptionsrotorn 2 och föres ut med fläktorgan 1. Lnftbehandling framgår av bifogat IX-diagram.With the evaporative humidifier 7, with complete access to cold water, such as normal city water or sea water and hot water of the temperature 700-80 ° C, a complete air conditioning can be achieved for most installation cases. The advantage of this humidification is that the risk of bacterial growth in the process air is eliminated by means of the indirect humidification through the sorption rotor. In Figure 3, as in Figure 1, the air flow I, which is to be dehumidified and cooled, is led through a sorptium rotor 2 and emits moisture there and is then passed to a cold water battery 5, which receives its water from the evaporative cooling in means 7 and then the air through a sorption rotor 4, where the air temperature is lowered further at the same time as the air is humidified again. A second air flow in the form of regeneration air II is passed through the evaporative humidifier 7, where the air is evaporatively humidified, whereupon the air is passed through a sorption rotor 4, where the air is dehumidified while the temperature rises, after which the regeneration air II is heated in a hot water battery 3. The now dehumidified and heated travel 9103 generating air finally regenerates the sorption rotor 2 and is carried out with fan means 1. Lift treatment is shown in the attached IX diagram.

Sorptionsrotorn 4 har även i detta alternativ till uppgift att åter* vinna energi, som måste uppoffras för att nå erforderlig avfuktning före den evaporativa befuktningen. Detta alternativ är avsett för installationer, där kallvatten är olämpligt att utnyttja till följd av bestämmelser eller kostnader. Anordningen för evaporativ kylning av vatten är i princip ett kyltorn men kan med fördel byggas som in- tegrerad del av kylaggregat. Fördelen med detta:alternativ är också, att avfuktning till erforderligt vatteninnehåll kan ske vid relativt låg temperatur.In this alternative, the sorption rotor 4 also has the task of recovering energy, which must be sacrificed to achieve the required dehumidification before the evaporative humidification. This option is intended for installations where cold water is unsuitable for use due to regulations or costs. The device for evaporative cooling of water is in principle a cooling tower but can advantageously be built as an integral part of cooling units. The advantage of this: alternative is also that dehumidification to the required water content can take place at a relatively low temperature.

Uppfinningen är naturligtvis icke begränsad till dessa utföranden utan kan självklart varieras inom ramen för flpgfinningstanken.The invention is of course not limited to these embodiments but can of course be varied within the scope of the inventive concept.

Claims (1)

1. 51 s nero '1 P A T E N T K R A V 1 Förfarande för torkning och kylning av luft, k ä n n e t e c k - n a t därav, att processluft(I), som införes av fläktorgan(6), avfuk- tas först i en första sorptionsrotor(2) och kyles därefter i ett kallvattenbatteri(5) samt ledes sedan till en andra sorptionsrotor(4), där luften åter uppfuktas och kyles, varefter-processluften(I) ledas till.det utrymme, som skall avfuktas och kylas, och samtidigt bringas regenereringsluft(II) att passera genom en sektor(2' och 4') på sorp- tionsrotorerna(2 och 4), varvid regenereringsluften(II) bringas att avgiva en del av sin fukt vid genomgång av den andra sorptionsrotorn (4) samtidigt som luftens temperatur stiger, varpå regenereringsluf~ ten(II) bringas att gå igenom ett varmvattenbatteri(5) och den varma och torkade regenereringsluften(II) bringas att regenerera den första sorptionsrotorn(2), varefter regenereringsluften(II) ledes ut med fläktorgarfl 1 ) 2 Förfarande enligt kravet 1, k ä n n e t e c k n a t därav, att regenereringsluften(II) först ledes genom ett evaporativt befuktar~ organ(7) för att uppfukta luften till lämplig relativ luftfuktighet på den kylda luften, innan regenereringsluften(II) föres såsom förut genom sorptionsrotorerna(2,4) 5 Förfarande enligt kravet 2, k ä n n e t e c k n a t därav, att kallvattenbatteriet(5) bringas att erhålla sitt vatten via lämpliga organ från evaporativ kylning i befuktarorganet(7) 4 Anordning för genomförande av förfarandet enligt kraven 1-3 för torkning och kylning av luft, k ä n n e t e c k n a d därav, att den består av två efter varandra anbragta sorptionsavfuktare eller sorp- tionsrotorer(2 och 4), vilka vardera äro utförda med regenererings- sektor(2' och 4') och torksektor(2" och 4"), till vilken första sorptionsrotor(2) processluft(I) är införd av fläktorgan(6) för av- fuktning och sedan kylning i ett kallvattenbatteri(5), varpå process- luften(I) är ledd till den andra sorptionsrotcrn(4) för befuktning oc kylning samt sedan ledd till det utrymme, som skall avfuktas och kylas, varvid regenereringsluft(II) samtidigt är förd genom regene- reringssektorerna(2' och 4') på sorptionsrotorerna(2 och Ä) och är anbragt att avgiva en delav sin fukt vid genomgång av den andra sorp- tionsrotorn(4) samtidigt med lufttemperaturstigning samt är anordnad att passera ett varmvattenbatteri(3), varefter den nu varma och tor- kade regenereringsluften(II) är anbragt att regenerera den första 516 970 6 sorptionsrotorn(2) samt är utförd med fläktorgan(1) 5 Anordning enligt kravet 4, k ä n n e t e c k n a d därav, att re- genereringsluften(II) är anordnad att först ledas genom ett evaporativt befuimarorganü) för uppfumning av :Luften till lämplig relativ luft- fuktighet på den kylda luften, innan regenereringsluften(II) är anord- nad att föras genom den andra sorptionsrotorn(4) 6 Anordning enligt kravet 5, k ä n n e t e c k n a d därav, att kallvattenbatteriet(5) är anbragt att erhålla sitt vatten via lämpliga organ från den evaporativa kylningen av befuktarorganet(7).A patent for drying and cooling of air, characterized in that process air (I) introduced by fan means (6) is first dehumidified in a first sorption rotor (2) and is then cooled in a cold water battery (5) and then led to a second sorption rotor (4), where the air is re-humidified and cooled, after which the process air (I) is led to the space to be dehumidified and cooled, and at the same time regeneration air is brought (II ) to pass through a sector (2 'and 4') on the sorption rotors (2 and 4), the regeneration air (II) being caused to release some of its moisture when passing through the second sorption rotor (4) at the same time as the air temperature rises , whereupon the regeneration air (II) is caused to pass through a hot water battery (5) and the hot and dried regeneration air (II) is caused to regenerate the first sorption rotor (2), after which the regeneration air (II) is discharged with fan bases fl 1) 2 requirement 1, characterized that the regeneration air (II) is first passed through an evaporative humidifier (7) to humidify the air to a suitable relative humidity of the cooled air, before the regeneration air (II) is passed as before through the sorption rotors (2,4). 2, characterized in that the cold water battery (5) is caused to obtain its water via suitable means from evaporative cooling in the humidifier means (7). Device for carrying out the method according to claims 1-3 for drying and cooling of air, characterized in that , that it consists of two successive sorption dehumidifiers or sorption rotors (2 and 4), each of which is made with a regeneration sector (2 'and 4') and a drying sector (2 "and 4"), to which the first sorption rotor ( 2) process air (I) is introduced by fan means (6) for dehumidification and then cooling in a cold water battery (5), whereupon the process air (I) is led to the second sorption root (4) for humidification and cooling and then led to in the space to be dehumidified and cooled, regeneration air (II) being simultaneously passed through the regeneration sectors (2 'and 4') on the sorption rotors (2 and Ä) and is arranged to release a part of its moisture when passing through the other sorption rotor (4) simultaneously with air temperature rise and is arranged to pass a hot water coil (3), after which the now hot and dried regeneration air (II) is arranged to regenerate the first 516 970 6 sorption rotor (2) and is made with fan means (1) Device according to claim 4, characterized in that the regeneration air (II) is arranged to be first passed through an evaporative heating means) for inventing: The air to a suitable relative humidity of the cooled air, before the regeneration air ( II) is arranged to be passed through the second sorption rotor (4) 6 Device according to claim 5, characterized in that the cold water battery (5) is arranged to obtain its water via suitable means from the evaporative the cooling of the humidifier (7).
SE9401581A 1994-05-06 1994-05-06 Air drying and cooling process SE516970C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9401581A SE516970C2 (en) 1994-05-06 1994-05-06 Air drying and cooling process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9401581A SE516970C2 (en) 1994-05-06 1994-05-06 Air drying and cooling process

Publications (3)

Publication Number Publication Date
SE9401581D0 SE9401581D0 (en) 1994-05-06
SE9401581L SE9401581L (en) 1996-05-02
SE516970C2 true SE516970C2 (en) 2002-03-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
SE9401581A SE516970C2 (en) 1994-05-06 1994-05-06 Air drying and cooling process

Country Status (1)

Country Link
SE (1) SE516970C2 (en)

Also Published As

Publication number Publication date
SE9401581L (en) 1996-05-02
SE9401581D0 (en) 1994-05-06

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