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. Socod toosan oo toosan ≥0.25m/s, qulqulka unidirectional toosan ≥0.35m/s, xaalad madhan ama ogaanshaha joogtada ah ee nadaafadda, in kasta oo ay buuxin karto shuruudaha, laakiin awoodda wasakhowga ka hortagga ayaa liidata, marka gudaha gudaha ee gobolka shaqada , nadaafadda waxaa laga yaabaa inaanay buuxin shuruudaha, tusaalooyinka noocan oo kale ah maaha kuwo shakhsi ah; Isla mar ahaantaana, taxanaha hawo-mareenka Shiinaha ayaan wali ku habboonayn nidaamka nadiifinta ee taageeraha, naqshadeeyaha guud inta badan si sax ah uma xisaabiyo caabbinta hawada ee nidaamka, ama ma fiiro gaar ah u leh haddii taageeraha la doortay uu ku jiro qalooca sifo ah oo ka mid ah barta shaqada ee aad u wanaagsan, si nidaamka loo geliyo shaqada ugu dhakhsaha badan ka dib, mugga hawada ama xawaaraha dabayshu ma gaari karaan qiimaha design. Heerarka Federaalka Mareykanka (FS209A ~ B) ayaa sidaas loo qeexay ka hor Oktoobar 27, 1987: Xawaaraha hawo-mareenka qolka nadiifka ah ee aan jiho lahayn iyada oo loo marayo qaybta qolka nadiifka ah waxaa badanaa lagu hayaa 9Oft/min (0.45m/s), iyo xaalada iyada oo aan wax faragelin ah lagu samayn qolka oo dhan, isku-duubnaanta xawaaraha waa ± 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 qiime lagu taliyey 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 mugga hawo-qaadista ayaa la kordhiyaa ilaa 20 ~ 25 jeer / h, heerka 10,000 waa kordhay ilaa 30 ~ 40 jeer / h, iyo heerka 1000 ayaa la kordhiyey ilaa 60 ~ 70 jeer / h, taas oo aan kordhinayn awoodda qalabka oo kordhisa maalgashiga 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 tijaabiyey xaalado firfircoon, natiijooyinkuna waxay muujiyeen in mugga hawo-qaadista ee 100,000 fasalka ≥10 jeer / h. 10,000 darajo ≥20 jeer/saacaddii, iyo 1000 darajo ≥50 jeer/saacaddii ayaa buuxin kara shuruudaha. Heerka federaalka ee Maraykanka (FS2O9A~B) wuxuu qeexayaa in qolka nadiifka ah ee socodka 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 daqiqo taas oo ah 20 jeer/saacaddii). 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.