Al'ada ce da aka saba amfani da shi a tsaye don kwantar da kajin a lokacin zafi.Don yawan noman kwai mai girma, saurin iska a cikingidan kazaya kamata ya kai aƙalla 3m / s, kuma saurin iska a cikin gidan kaza a cikin yanayin zafi da zafi mai zafi ya kamata ya kai fiye da 4m / s don samun sakamako mai kyau na "iska mai sanyi".
"Sakamakon sanyaya iska" galibi yana nufin saurin iska don rage zafin jiki na kaji.
Yaya tasirin saurin iska zai iya yi akan zafin jiki na kaji?
“A cewar wani bincike da Jami’ar Jojiya ta yi, saurin iska ya karu daga 0m/s zuwa 2.54m/s.Yanayin zafin jiki na kaji zai ragu da fiye da 6°C.”
Domin samun mafi girman saurin iska, Ni al'adar da aka saba yi ita ce yingidan kazarufi, rage tsayin kajin kajin, ko kuma daga saman kwanon kajin tare da rufin triangular a tsaye zuwa kowane tazara don shigar da labule na iska ko iska don rage giciye-yankin kajin don inganta saurin iska. a cikin kofa.
Me yasa kuke yin haka, galibi saboda saurin iskar yana da alaƙa da kusancin yanki na giciye nagidan kaza.
Ƙididdigar saurin iska a cikin kajin kaji mai tsayi mai tsayi: saurin iska = ƙarar iska / yanki mai giciye na coop
A bayyane yake daga wannan dabarar cewa don ƙara saurin iskar coop ɗin, ko dai ƙara samun iska na coop ɗin, watau ƙara yawan magoya baya mara kyau, ko rage madaidaicin yanki na coop ɗin.
Ƙarfafa magoya baya yana nufin ƙara farashi, ƙara yawan amfani da wutar lantarki, ƙara farashin gyarawa, kuma a cikin dogon lokaci yana ƙara ƙimar aiki ga kamfani.
Sa'an nan kuma ƙara yawan saurin iska ya kamata a yi la'akari da shi daga rage yanki na giciye nagidan kaza.Da ke ƙasa mun fahimci canje-canjen kajin kajin kafin da bayan haɓaka labulen toshe iska ta takamaiman ƙididdiga.
Misali: kaji mai nisa 12m, tsayin 100m, bangon gefen coop ɗin yana da tsayi 2.4m, tsakiyar coop (mafi girman) shine 4.8m, an shigar da coop tare da magoya bayan inch 10 50, ƙarfin samun iska na iska. kowane fan a -50 Pa shine 31000m³/h.
Sa'an nan kuma gudun iska na coop ɗin kajin ya zama: saurin iska = ƙarar iska / yanki mai giciye = 31000/3600× 10 / [12× (4.8 + 2.4) / 2] = 86.1/43.2 = 1.99m / s
Idan muka shigar da rufi ko labulen iska a cikin kwandon kaji, don haka tsayin saman saman kogin ko ƙananan gefen ɗigon daga ƙasa shine 3.6m, kuma tsayin bangarorin biyu na coop ya kasance ba canzawa, gudun iska = 31000/3600×10/[12×(3.6+2.4)/2]=86.1/36=2.39m/s
Sabili da haka, a cikin adadin adadin magoya baya, ta hanyar rage ƙetare yanki na gidan kaji na iya ƙara yawan iska a kan tushen 0.4m / s na asali, wato, haɓaka ya karu da 20%, Canje-canjen saurin iskar da tasirin iskar sanyaya ya haifar shima ya bambanta, bambanci tsakanin tasirin sanyaya iska guda biyu daidai da zafin jiki na kusan 2.℃, a yanayin matsanancin zafin jiki, bambancin zafin jiki na 2℃ya isa ya haifar da mummunar cutarwa ga kaji.
Lokacin aikawa: Agusta-12-2022
