Na'urar gane Carbon dioxide

Firikwensin carbon dioxide ko firikwensin CO2 kayan aiki ne don auna iskar carbon dioxide. Ka'idodin gama gari don na'urori masu auna firikwensin CO2 sune na'urori masu auna iskar gas na infrared (NDIR) da na'urori masu auna iskar gas. Auna carbon dioxide yana da mahimmanci wajen lura da ingancin iska na cikin gida,Kampezidou, S. I.; Tikayat Ray, A.; Duncan, S.; Balchanos, M.G.; Mavris, D.N. (2021-01-07). "Real-time occupancy detection with physics-informed pattern-recognition machines based on limited CO2 and temperature sensors". Energy and Buildings. 242: 110863. Bibcode:2021EneBu.24210863K. doi:10.1016/j.enbuild.2021.110863. ISSN 0378-7788. S2CID 233831299. aikin huhu a cikin nau'in na'urar capnograph, da kuma tsarin masana'antu da yawa.

Na'urori masu auna firikwensin infrared (NDIR) CO2

Na'urori masu auna firikwensin NDIR sune na'urori masu auna firikwensin gani don gano CO2 a cikin mahalli mai iskar gas ta hanyar halayensa. Maɓallin abubuwan da aka haɗa sune tushen infrared, bututu mai haske, tsangwama (tsawon tsayi), da mai gano infrared. Ana fitar da iskar gas ko kuma ya bazu cikin bututun haske, kuma na'urorin lantarki suna auna ma'aunin yanayin tsayin haske. An fi amfani da firikwensin NDIR don auna carbon dioxide.[2] Mafi kyawun waɗannan suna da hankali na 20-50 PPM. Farashin firikwensin NDIR na yau da kullun a cikin (US) $100 zuwa $1000.

Hakanan ana amfani da na'urori masu auna firikwensin NDIR CO2 don narkar da CO2 don aikace-aikace kamar carbonation abin sha, fermentation na magunguna da aikace-aikacen sequestration CO2. A wannan yanayin an haɗa su zuwa na'urar gani ta ATR (attenuated total reflection) kuma auna iskar gas a wurin. Sabbin abubuwan ci gaba sun haɗa da amfani da tsarin microelectromechanical (MEMS) tushen IR don rage farashin wannan firikwensin da ƙirƙirar ƙananan na'urori (misali don amfani da aikace-aikacen kwandishan).Vincent, T.A.; Gardner, J.W. (November 2016). "A low cost MEMS based NDIR system for the monitoring of carbon dioxide in breath analysis at ppm levels". Sensors and Actuators B: Chemical. 236: 954–964. Bibcode:2016SeAcB.236..954V. doi:10.1016/j.snb.2016.04.016.

Hakanan za'a iya amfani da wata hanya (Dokar Henry) don auna yawan narkar da CO2 a cikin ruwa, idan adadin iskar gas ɗin waje ba shi da mahimmanci.

 Na'urorin daukar hoto 
CO2 za a iya auna ta amfani da photoacoustic spectroscopy. Ana iya auna ma'auni na CO2 ta hanyar ƙaddamar da samfurin zuwa bugun jini na makamashin lantarki (kamar daga laser ra'ayi mai rarraba) wanda aka kunna musamman zuwa tsayin daka na CO2. Tare da kowane bugun jini na makamashi, ƙwayoyin CO2 a cikin samfurin za su sha kuma su haifar da raƙuman ruwa ta hanyar tasirin hoto. Ana gano waɗannan igiyoyin matsa lamba tare da na'urar gano sauti kuma a canza su zuwa karatun CO2 mai amfani ta hanyar kwamfuta ko microprocessor.AG, Infineon Technologies. "CO2 Sensors - Infineon Technologies". www.infineon.com. Retrieved 2020-11-10.

 Chemical CO2 firikwensin 
Chemical CO2 gas na'urori masu auna firikwensin tare da m yadudduka dangane da polymer- ko heteropolysiloxane suna da babba fa'ida na sosai low makamashi amfani, da kuma cewa su za a iya rage girman don shige cikin microelectronic tushen tsarin. A gefen ƙasa, tasirin ɗan gajeren lokaci da na dogon lokaci, da kuma ƙarancin rayuwa gaba ɗaya, manyan cikas ne idan aka kwatanta da ƙa'idar auna NDIR. Yawancin na'urori masu auna firikwensin CO2 an daidaita su sosai kafin jigilar kaya daga masana'anta. A tsawon lokaci, sifilin sifili na firikwensin yana buƙatar a daidaita shi don kiyaye tsayin daka na firikwensin."CO2 Auto-Calibration Guide" (PDF). Archived from the original (PDF) on 2014-08-19. Retrieved 2014-08-19.

 Ƙimar CO2 firikwensin 
Don mahalli na cikin gida kamar ofisoshi ko gyms inda babban tushen CO2 shine numfashin ɗan adam, sake dawo da wasu sauƙi-zuwa-aunawa kamar su abubuwan da ba a iya gani ba (VOC) da iskar hydrogen gas (H2) suna ba da ingantaccen isasshiyar kimanta ainihin CO2 maida hankali don samun iska da zama. ƙwayoyin cuta, matakan CO2 suna da ƙayyadaddun ma'auni don haɗarin COVID-19; mafi munin iskar iska, mafi kyau ga ƙwayoyin cuta da akasin haka. Ana iya yin firikwensin waɗannan abubuwa ta amfani da fasaha mai arha (~ $20) Tsarin Microelectromechanical (MEMS) ƙarfe oxide semiconductor (MOS). Karatun da suke samarwa ana kiransa da kimanta CO2 (eCO2) ko CO2 daidai (CO2eq). Ko da yake karatun yana da kyau a cikin dogon lokaci, gabatar da hanyoyin da ba na numfashi na VOC ko CO2, kamar bawon 'ya'yan itace ko amfani da turare, zai lalata amincin su. Na'urori masu auna firikwensin H2 ba su da sauƙi saboda sun fi dacewa da numfashin ɗan adam, ko da yake yanayin lafiyar da aka saita gwajin numfashin hydrogen zai iya rushe su.Herberger S, Herold M, Ulmer H (2009). "MOS gas sensor technology for demand controlled ventilation" (PDF). Proceedings of the 4th International Symposium on Building and Ductwork Air Tightness and 30th AIVC Conference on Trends in High Performance Buildings and the Role of Ventilation. Berlin

 Aikace-aikace 
Misalai:

Sauye-sauyen yanayi

ingancin iska na cikin gida

Ganewar Stowaway

Stores na cellar da gas

Tasoshin ruwa

Gine-gine

iskar gas

Wurare masu iyaka

Jirgin sama

Kiwon lafiya

Noman noma

Sufuri

Cryogenics

Gudanar da iska

Ma'adinai

Rebreathers (SCUBA)

Decaffeination

Don ƙidaya yawan zama na cikin gida

Don aikace-aikacen HVAC, ana iya amfani da na'urori masu auna firikwensin CO2 don saka idanu ingancin iska da kuma dacewa da buƙatun iska mai kyau, bi da bi. Auna matakan CO2 a kaikaice yana ƙayyade adadin mutane nawa a cikin ɗaki, kuma ana iya daidaita samun iska daidai. Duba iskar da ake sarrafa buƙatun (DCV).

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