Shuruudaha xawaaraha dabaysha ee qolka nadiifka ah iyo isbeddelada hawada

Mugga hawo-qaadista oo ku filan waa in la milo oo la tirtiro hawada wasakhaysan ee gudaha, iyadoo loo eegayo shuruudaha nadaafadda ee kala duwan, markaqol nadiif ahdhererka saafiga ah ayaa ka sarreeya, kororka ku habboon ee tirada isbeddelka hawada. Waxaa ka mid ah, mugga hawo-qaadista ee 1 milyan oo qolal nadiif ah ayaa loo tixgaliyaa iyadoo loo eegayo nidaamka nadiifinta hufnaanta sare [7], inta soo hartayna waxaa loo tixgeliyaa iyadoo loo eegayo nidaamka nadiifinta hufnaanta sare. Marka 100,000-heer nadiif ah shaandhada HEPA si dhexe loogu habeeyo qolka mishiinka ama dhamaadka nidaamka, tirada isbeddelada hawada waxaa si habboon loo kordhin karaa 10-20%.

Qiimaha sare ee lagu taliyey ee mugga hawo-qaadista, qoraagu wuxuu aaminsan yahay in xawaaraha dabaysha ee qaybta qolka ee unidirectionalqulqulaya qol nadiif ahwuu hooseeyaa, qolka nadiifka ah ee qalalaasuhuna waa qiimaha lagu taliyay oo leh arrin badbaado oo buuxda. Qulqulka tooska ah ee unidirectional ≥0.25m / s, qulqulka unidirectional ≥0.35m / s, ee gobolka madhan ama ogaanshaha joogtada ah ee nadaafadda, inkastoo ay buuxin karaan shuruudaha, laakiin awoodda ka-hortagga wasakhda ayaa liidata, marka gudaha gudaha ee gobolka shaqada, nadaafaddu ma buuxin karto shuruudaha, tusaalooyinka noocan oo kale ah maaha kuwo shakhsi ah; Isla mar ahaantaana, taxanaha hawo-mareenka Shiinaha ayaan weli ku habboonayn nidaamka nadiifinta ee taageeraha, naqshadeeyaha guud inta badan si sax ah uma xisaabiyo iska caabbinta hawada ee nidaamka, ama ma fiiro gaar ah u yeelo haddii taageeraha la doortay uu ku jiro qalooca sifada ee barta shaqada ee wanaagsan, si nidaamka loo geliyo shaqada ugu dhakhsaha badan ka dib, mugga hawada ama xawaaraha dabaysha ma gaari karo qiimaha naqshadeynta. Heerarka Federaalka Mareykanka (FS209A ~ B) ayaa sidaas loo qeexay ka hor Oktoobar 27, 1987: Xawaaraha hawo-mareenka qolka nadiifka ah ee aan jihada lahayn iyada oo loo marayo qaybta qolka nadiifka ah waxaa badanaa lagu hayaa 9Oft / min (0.45m / s), iyo iyada oo la raacayo xaalad aan faragelin qolka oo dhan ah, lebiska xawaaraha wuxuu ku dhex jiraa ± 20%. Hoos u dhac kasta oo weyn oo ku yimaadda xawaaraha socodka hawadu wuxuu kordhiyaa suurtagalnimada saamaynta wasakhaysan inta u dhaxaysa wakhtiga is-nadiifinta iyo goobta shaqada (dhammaan cabbirrada aan ka ahayn feejignaanta boodhka lama cayimin ka dib faafinta FS209C ee Oktoobar 1987).

Si taas loo gaaro, qoraagu wuxuu u maleynayaa in ay ku habboon tahay in si habboon loo kordhiyo qiimaha naqshadeynta gudaha ee hadda jira ee xawaaraha socodka unidirectional, cutubkayaga mashruuca dhabta ah si loo sameeyo, saameyntu way ka fiican tahay. Nooca qalalaasaha qolka nadiifka ah waa qiimaha lagu taliyay oo leh qodob badbaado oo buuxa, laakiin naqshadeeyayaasha badan ayaan weli la hubin in marka la samaynayo naqshad gaar ah, heerka 100,000 ee qolka nadiifka ah ee qolka nadiifka ah mugga hawo-qaadista ayaa la kordhiyaa ilaa 20 ~ 25 jeer / h, heerka 10,000 waa la kordhiyey ilaa 30 ~ 40 jeer / h, iyo ~ 1000 heerka qalabku wuxuu kordhiyaa ilaa 70 jeer / h. maalgelinta bilowga ah. Waxa kale oo ay kordhisaa kharashka dayactirka iyo maaraynta mustaqbalka, mana aha lagama maarmaan in sidaas la sameeyo. Marka la diyaarinayo tallaabooyinka farsamo ee nadiifinta hawada ee Shiinaha [7], in ka badan 100 qolal nadiif ah oo guriga ah ayaa la baaray oo la cabbiray, qolal badan oo nadiif ah ayaa weli lagu tijaabiyay xaalado firfircoon, natiijooyinkuna waxay muujiyeen in mugga hawo-qaadista ee 100,000 fasalka ≥10 jeer / h, 10,000 grade ≥20 jeer / h, iyo 1 jeer shuruudaha darajada 1. Heerarka federaalka ee Maraykanka (FS2O9A~B) ayaa qeexaya in qolka nadiifka ah ee aan jiho ahayn (class 100,000, fasalka 10,000), dhererka qolka 8 ~ l2ft (2.44 ~ 3.66m), badanaaba tixgeli qolka oo dhan ugu yaraan hal mar 3dii daqiqiba (taas oo ah, 20 jeer / saac). Sidaa darteed, qodobbada qeexitaanka naqshadeynta [6] waxay tixgeliyeen isku-dhafka hodanka weyn, naqshadeeyuhu wuxuu si badbaado leh u dooran karaa iyadoo loo eegayo qiimaha lagu taliyey ee mugga hawo-qaadista.