U phela joang motheo le mohloahong ka AHU?

Mabaka a Tlhahisoleseding ya Tlhomamiso ya Moeli le ya Mokhoa wa AHU

Ka ho hlahloba joang li-coil tsa ho bula/ho qhala lihlopha tsa moeli ka ho fumana setpoint e nepahetseng

Tsela e ka sehloohong ea ho laola mocheso ka tsela e utloahalang liuniting tsa ho sebetsana le moea (AHUs) ke ka li-coil tsa ho futhumatsa le ho pholisa. Ha metsi a batang a phalla ka har'a li-coil tsena, a pholile moea o kenang ka tlas'a phoka e thusang ho tlosa mongobo ka nako e tšoanang. Li-coil tsa metsi a chesang kapa tsa mouoane li sebetsa ka tsela e fapaneng ka ho eketsa mocheso o laoloang moeeng. Mekhoa ea kajeno ea kajeno e ka boloka mocheso oa moea o tsoang ka har'a mocheso o ka bang halofo ea likhato tsa Celsius ka lebaka la li-controller tsa PID tse nang le mocheso o phahameng. Litsamaisi tsena li lula li fetola moo li-valve li bulang teng ho itšetlehile ka seo li-sensor li se tlalehang ka nako ea sebele. Sistimi eohle e ikamahanya hantle le maemo a fetohang joaloka ha batho ba tsamaea libakeng tse ling kapa ha boemo ba leholimo bo fetoha ka tšohanyetso. Ho arohana ho khethehileng ha mocheso ho etsoang ka tloaelo ka thepa ea polyamide pakeng tsa likarolo tse fapaneng tsa khoele ho thibela mocheso o sa batleheng hore o se ke oa tsamaea. Sena se bohlokoa haholo bakeng sa ho boloka mocheso o tsitsitse libakeng tse kang lilaboratori le likamore tse hloekileng moo esita le liphetoho tse nyenyane li leng bohlokoa haholo.

Lintho tsa motheo tsa ho tlosa mongobo: Ho tlosa mongobo ka ho kopanya le ho etsa mongobo ka mokhoa o sebetsang

Ho laola mongobo ho sebetsa ka mekhoa e'meli e tlatsanang:

• Ho tlosa mongobo ka ho kopanya , moo li-coil tse pholileng li fokotsang mocheso oa moea ka tlase ho ntlha ea phoka, e leng se etsang hore mongobo o teteane holim'a li-coil ebe oa tsoa. Tshebetso ena e atile haholo libakeng tse nang le mojaro o phahameng joaloka libakeng tsa tropike.
• Ho nolofatsa ka mafolofolo , e kenyang mouoane kapa metsi a phatlohileng ka liphaephe tsa ho hasanya ha mongobo o ka hare oa ntlo (RH) o theoha ka tlase ho sepheo se tloaelehileng mariha kapa maemong a omileng.

Ho fumana boholo bo lekanyetsoeng ho tšoara ka mohato o monyane. Ha li-coil tsa ho qhutisa mafura li le kholo haholo, li hloka mafura a mangata a ho qhutisa hape. Ka tsela e 'malo, ha li-humidifier li sa le boholo bo lekaneng bakeng sa sebaka, li sa kgone ho boloka mafura a mabotse (relative humidity) ka holim'a bokhutšo bo tlase ha li lekana le litemperatšure tse matla le tse mafura tseo re li bonang ka mohato o monyane. Ho hloka ho lekanya ka mohato o monyane litšepiso tsa ho qhutisa mafura (latent load) ho fumana karolo e lekaneng e ka bolokang mafura a mabotse (RH) ka mohato o monyane ka ho felisa le ho qetela 5% ka holim'a le ka tlase. Le ha o sa hlōle li-drain pan hape. Li hloka ho lekana ka mohato o monyane ho latela maemo a ASHRAE Guideline 18. Ka ho eketsa, ho lekola li-drain pan ka lithapo tse nang le litšhepiso tsa ho qhutlisa mikroba e ka thusa ho qhutlisa mikroba e mengata eo e qhutlisang ha e qhutlisa mafura (condensation cycles) tseo e qhutlisang ka mohato o monyane mo litšebisong tsena.

Likomponente tsa AHU tse phahameng bakeng sa ho phahamisa ho lekana ha mahala le mafura a AHU

Li-desiccant dehumidifiers le li-steam humidifiers mo litlhaping tse nyenyane le tse kholo tsa mafura a mabotse (low- and high-RH critical zones)

Li-desiccant dehumidifiers li sebetsa ka ho hula mongobo moeeng ka lik'hemik'hale, e leng se ba lumellang ho boloka mongobo o le ka tlaase ho 5% RH libakeng tse hlokang mongobo o tlase haholo, joaloka mehaho ea tlhahiso ea li-semiconductor. Libaka tsena li hloka maemo a omileng joalo hobane esita le mongobo o monyenyane o ka baka mathata a ho tsoa ha motlakase a senyang thepa e thata. Ka lehlakoreng le leng, likamore tse hloekileng tsa meriana hangata li sebelisa li-humidifier tsa mouoane. Lisebelisoa tsena li ntša mouoane o hloekileng o se nang likaroloana ho boloka mongobo o tsitsitse ka har'a halofo ea liphesente tsa RH. Sena se thusa ho thibela lihlahisoa hore li se ke tsa monya mongobo le ho senyeha ha nako e ntse e feta. Lisebelisoa tse ngata tsa kajeno li akarelletsa seo ho thoeng ke mabili a ho hlaphoheloa ha enthalpy mefuteng ena ka bobeli ea tsamaiso. Likarolo tsena li thusa ho boloka litšenyehelo tsa matla ka liphesente tse 25 ho ea ho tse 40 ha li bapisoa le tsa mefuta ea khale. Ho laola mongobo hantle ho bohlokoa haholo ha ho sebetsanoa le li-air handling unit tse sebetsang ka mocheso o fapaneng. Tsamaiso e nepahetseng e thibela mathata a ho petsoha a ka sitisang mekhoa ea tlhahiso le ho senya boleng ba sehlahisoa mekhahlelong e fapaneng ea tlhahiso.

Moralo oa ho robeha ha mocheso le thibelo ea condensation likarolong tsa AHU tse nang le mocheso o habeli

Lisebelisoa tse etsang hore ho be le mocheso o lekaneng tse kang litšitiso tsa polyamide li thusa ho boloka moea o chesang le o batang o arohane ka har'a li-air handling unit. Ho ea ka lipatlisiso tsa morao tjena tsa ASHRAE, liphesente tse ka bang 74 tsa mathata a tšilafalo a libakeng tsa ho phomola a bakoa ke likokoana-hloko tse hōlang ka lebaka la ho ba le metsi a mangata. Ha li-breaker tsa mocheso li entsoe hantle, li thibela ho ba le mocheso o lekaneng'me li boloka phapang ea mocheso e le ka holimo ho likhato tse 30 tsa Celsius ntle le ho baka condensation holim'a metsi. Lithibelo tsena tse khethehileng li fokotsa tahlehelo ea matla e amanang le ho patoa ha metsi ka karolo e ka bang 15 ho ea ho 22 lekholong selemo le selemo. Mehato e meng ea bohlokoa e akarelletsa ho kenya li-panel tse thibelang metsi ho kena ka har'a tsamaiso le ho etsa bonnete ba hore ho na le litšitiso tse sa khaotseng tsa mouoane tsamaisong eohle. Mekhoa ena kaofela e sireletsa likarolo tsa ka hare hore li se ke tsa kolobisoa libakeng tseo mongobo o leng holimo haholo ha ho sebelisoa thepa.

Ho kenya, Ho leka ho etsa ka tsela e tšepahalang, le ho bala mabaka a ho sebelisa ka mokhoa o sa reroang

Ho kenya BAS: Ho khutlisa maikutlo a lekana, ho hloka ho fanoa ka litšebetso tsa PID, le litšebetso tsa ho lekola li-sensor tse ntle

Ho laola mocheso le mongobo hantle ho tsoa li-air handling unit ho itšetlehile haholo ka ho ba le tsamaiso e tiileng ea ho iketsetsa mehaho. Tsamaiso ea ho khutlisa e koetsoeng e lula e hlahloba seo li-sensor li se lekanyang khahlanong le litekanyetso tse reretsoeng, e leng se etsang hore tsamaiso e fetole li-valve, li-dampers le li-humidifiers ha ho hlokahala. Ho lokisa PID ho thusa ho etsa liphetoho tse nepahetseng e le hore tsamaiso e arabele ka potlako ntle le ho ea hōle haholo kapa ho phalla haholo. Sena ke sa bohlokoa haholo libakeng tse kang lilaboratori tsa meriana moo esita le liphetoho tse nyenyane tsa mocheso tsa + kapa - halofo ea degree li ka senyang lihlahisoa tse ngata. Re khothalletsa hore ho etsoe litekanyo tsa selemo le selemo ho sebelisoa litekanyetso tsa NIST tse ka fumanoang ho boloka li-sensor li nepahetse hobane ho kheloha ha lipalo ke lebaka le ka sehloohong le etsang hore tsamaiso ena e hlolehe. Mathata a mangata a bakoa ke li-sensor tse sa bolokeng nako e telele. Libakeng tse mahlonoko, kenya li-sensor tsa backup, beha li-diagnostics tse iketsang ho lemoha mathata esale pele,'me u leke mekhoa eohle ea taolo ka maemo a fapaneng a mojaro pele u kenya ntho e 'ngoe le e 'ngoe ts'ebetsong.

Tsebo ea Mosebetsi: Tahlolo ea Phoso ea Lab AHU (Kholo-kholo ea 0.3°C — Kholo-kholo ea Mohlomola)

Sebaka sa biotech se bonahalitse ho hlakisa mabotho a mangata ka lebaka la kholo-kholo ea 0.3°C ea moeli ho AHU ya laboratori. Tahlolo ea lekhotla la lebitso le fumane sebaka sa phoso se le 'ngoe se le 'ngoe—li-sensor tsa ho leka ho lekholo li lekholo, le li-loop tsa PID tse sa hlophisoang hantle—tseo tse peli li beng tse etsang ho lekholo ha ductwork le ho fetoha ha mofuta oa mofuta. Ho lekholo la $220,000 le khaletse:

1. Ho tsamaisa li-sensor tsohle tsa ho leka ho lekholo le ho leka moeli ka li-unit tse nang le tsebo ea NIST,
2. Ho hlophisa li-parameter tsa ho araba ka ho sebelisa li-profile tsa ho sebelisa le ho lekholo tsa mafatše,
3. Ho eketsa ho leka ho lekholo ha dew point ho tseba pele ho lekholo la ho lekholo.
   Ka mor'a ho etsa sena, ho lekholo ha moeli o ile a eketseho ho fihla ho ±0.1°C, o tlosoa kholo-kholo ea mohlomola le ho hlakisa mabotho a amanang—ho bontša hore kholo-kholo e nyane ea ho lekholo kapa ho hlophisa e ka etela ho fihla ho tlhokomelo e boima le ho fihla ho tlhokomelo ea mofuta wa mofuta.

Litshebeletso tse tloaelehileng le litshebeletso tse boiketsetseng tsa ho araba ho lekholo le ho lekholo ha AHU

Litsamaiso tsa AHU tse entsoeng hantle li ntse li e-na le mathata kamehla. Litsebi tsena li tloaetse ho tsamaea ka halofo ea likhato tsa Celsius kapa karolo ea bohlano ea mongobo oa moea ha nako e ntse e feta. Ho silafala ha li-coil ke bothata bo bong bo boholo bo ka fokotsang katleho ea ho fetisetsa mocheso ka karolo ea 30 lekholong. Hape ho na le bothata ba ho laola lintlha tsa phoka hantle. Ho laola mongobo ho ntse ho le bothata ba sebele ho ba sebetsang ba bangata. Ho ea ka boitsebiso bo tsoang ho ASHRAE, hoo e ka bang karolo ea bobeli borarong ea batsamaisi ba mehaho ba thatafalloa ke ho boloka litekanyetso tse thata tsa RH ntle le ho lefa litšenyehelo tse ngata tsa matla. Ke e 'ngoe ea lintoa tse ntseng li tsoela pele tsa tlhokomelo ea HVAC.

Ho araba ka molao ha ho qetela ho qala ka ho lekola ka mokhoa o nepahetseng le ho sheba ka mafoko a mararo. Li-sensor tse tšoanang le tse tšebeliswang ka ho lekola li lokela ho shebwa ka li-standard tsa NIST ka mafoko a mararo, ha ho lokela ho shebwa ka mafoko a mabedi ho bona hore li sebetsa joalo ka ho lokela. Ha u sebetsa le litšhupiso tsa moholo, se ke u qala ka ho fetola litšhupiso tsa ho lekola. Pele ho qala, sheba hore na likarolo tsa mekaniki li sebetsa joalo ka ho lokela - sheba hore na li-nozzle tsa li-humidifier tsa steam li tshehetseng kapa na li-wheel tsa desiccant li sebetsa ka lebelo le lokelang. Litlog tsa ho lekola tsa ho lekola tsa bophelo ba thuto (BAS) li ka fumana litšhupiso tsa PID loop tseo li beng ka 42 percent tsa litšhupiso tsa ho lekola. Ha litšhupiso li tla fihla kamora litšhupiso tseo, ho nepahetseng ho lekola likarolo tse fapaneng tsa unit ya ho lekola ha mofuta o mong le o mong. Lekola likarolo tsa ho lekola, ho lekola, le ho lekola ka mofuta o mong le o mong ho fumana sebaka sa litšhupiso tsa valves, dampers, kapa actuators. Ho lekola ka mofuta o mong le o mong o bohloko hape. Ho hlakisa coils le ho solofatsa filters ka mafoko a mararo ho lula ho lekola ka 80 percent tsa litšhupiso tsa ho lekola tseo e se nang le mofuta o mong le o mong. Lisepako tseo li sebetsang ka mokhoa o itseng o lekola litšhupiso tsa mofuta o mong le o mong li bonahala ka 57 percent tsa litšhupiso tsa mofuta o mong le o mong, mme likarolo tsa bona li sebetsa ka mofuta o mong le o mong pele ho hloka ho fetolwa.

FAQ

Lintho tse kholo tsa AHU tse balang mohato oa moea le mohato oa mafutha ke life?

AHU e sebelisa mafutha a ho bala le a ho qetela ho lekola mohato oa moea, ha o sebelisa mekaniki ea ho qhobetsa le ho futha ho lekola mohato oa mafutha. Lintho tse phahameng li khaufa ho tsoa ho desiccant dehumidifiers, steam humidifiers, le enthalpy recovery wheels.

Lintho tse phahameng tsa ho qhobetsa tse balang mohato oa mafutha li etsa eng ho fokotsa mohato oa AHU?

Lintho tse phahameng tsa ho qhobetsa, joalo ka polyamide barriers, li thusa ho tshehetsa ho qhobetsa ha mafutha ho tsoa ho AHU, ka hona li boloka phapang ea mohato oa moea ho tsoa ho tse ling, ha li sebele ho qhobetsa, li fokotsa mokhoa oa ho fihla ha litšoantšo, le li fokotsa ho thibela mafutha.

Ke eng eo ho hloka ho lekola ka ho fetisisa ho sensors ho bohloko bakeng sa mohato oa AHU?

Ho lekola ka ho fetisisa ho sensors ho netefatsa ho lekola ka ho fetisisa ho mohato le ho mafutha. Ho fokotsa ho lekola ho sensors ho ka araba ho sebelisoa ka ho se nang le mofuta wa ho lekola, ho feletsa ho hloka ho lekola ka ho fetisisa ho sehlooho, le ho eketseha ho tlhokomelo ya mosebetsi.

Lintho tse tloaelehileng tsa ho sebelisoa ka ho AHU ke life le ho ka lekola joang?

Diphoofolo tse tloaelehang di kenyella ho fokotseha ha sensor, ho tšoarwa ha coil, le diphoofolo tsa ho lekola ho tšoara ho tšwelela ha mafura. Tseo ka khona ho tšoarwa ka ho etsa ho lekola ka tsela e tloaelehang, ho sheba, ho hlakola, le ho fetola sistimi ho latela ho analisa ho tšwelela ha rona.