Waa dhaqan caadi ah in la isticmaalo hawo toosan si loo qaboojiyo digaagga xilliga xagaaga ee kulul.Beerista ukunta degdega ah ee cufnaanta sare leh, xawaaraha dabaysha ee gudahadigaag digaagwaa in uu gaaro ugu yaraan 3m/s, iyo xawaaraha dabaysha ee guriga digaaga ee kuleyl sare iyo qoyaan badan waa in uu gaaro in ka badan 4m/s si loo helo "saamaynta qaboojinta dabaysha".
"Saamaynta qaboojinta dabaysha" waxay inta badan loola jeedaa xawaaraha dabaysha si loo yareeyo heerkulka jidhka ee digaagga.
Intee in le'eg ayay xawaaraha dabayshu ku yeelan kartaa heerkulka jidhka digaagga?
"Sida lagu sheegay daraasad ay samaysay Jaamacadda Georgia, xawaaraha dabayshu wuxuu ka kacay 0m/s ilaa 2.54m/s.Heerkulka jidhka digaagga ayaa hoos u dhici doona in ka badan 6°C.”
Si loo helo xawaaraha dabaysha oo weyn, waxaan ahay dhaqanka caadiga ah waa in la sameeyoguri digaagsaqafka, hoos u dhig dhererka digaaga digaaga, ama ka koraya digaaga digaaga ee ku yaal saqafka saddex xagal si toosan hoos masaafo kasta oo gaar ah si aad u rakibto daahyada dabaysha ama daahyada daahyada si loo yareeyo aagga iskutallaab ee digaagga digaagga si loo hagaajiyo xawaaraha dabaysha gudaha coop.
Waa maxay sababta tan loo sameeyo, inta badan sababtoo ah xawaaraha dabayshu wuxuu si dhow ula xiriiraa aagga is-dhaafka ah ee aaggadigaag digaag.
Xisaabinta xawaraha dabaysha ee coop digaaga oo hawo dheer leh: Xawaaraha dabaysha = mugga hawo-qaadista / aagga isdhaafka ah ee coop
Way caddahay qaacidadan in la kordhiyo xawaaraha dabaysha ee coop, ama la kordhiyo hawo-qaadista coop-ka, ie kordhinta tirada taageerayaasha cadaadiska diidmada ah, ama la yareeyo aagga isgoysyada coop-ka.
Kordhinta marawaxadaha waxay ka dhigan tahay korodhka kharashyada, kordhinta isticmaalka korontada, kordhinta kharashka dayactirka, iyo mustaqbalka fog ku kordhinta kharashyada hawlgelinta ganacsiga ee muhiimka ah.
Kadibna kordhi xawaaraha dabaysha waa in laga fiirsado dhimista aagga isgoysyada ahdigaag digaag.Hoos waxaan fahamsanahay isbeddelada digaagga ka hor iyo ka dib kordhinta daahyada dabaysha ee xisaabinta gaarka ah.
Tusaale ahaan: digaag digaag 12m ballac ah, 100m dherer ah, darbiyada dhinaca ee coop waa 2.4m sare, dhexe ee coop (ka ugu sarreeya) waa 4.8m, coop waxaa lagu rakibay 10 50 taageere inch, awoodda hawo ee taageere kasta at -50 Pa waa 31000m³/h.
Kadibna xawaaraha dabaysha ee coop digaaggu waa inuu noqdaa: Xawaaraha dabaysha = mugga hawo-mareenka / aagga isdhaafka = 31000/3600× 10 / [12× (4.8 + 2.4) / 2] = 86.1/43.2 = 1.99m/s
Haddii aan ku rakibno saqafka ama daahyada daahyada ee digaagga, si dhererka sare ee coop ama cidhifka hoose ee daahyada ka soo dhulka uu yahay 3.6m, dhererka labada dhinac ee coop-ka ayaa weli ah mid aan isbeddelin, Xawaaraha dabayshu waa = 31000/3600×10/[12×(3.6+2.4)/2]=86.1/36=2.39m/s
Sidaa darteed, marka la eego tirada isku midka ah ee taageerayaasha, iyada oo la yareynayo aagga is-goysyada ee guriga digaaga waxay kordhin kartaa xawaaraha dabaysha iyadoo lagu saleynayo asalka 0.4m / s, taas oo ah, waxtarka ayaa kordhay 20%, isbeddelada xawaaraha dabaysha ee ay soo saarto saamaynta qaboojinta dabayshu sidoo kale way ka duwan tahay, farqiga u dhexeeya labada saamayn qaboojinta dabaysha oo u dhiganta heerkulka qiyaastii 2℃, haddii ay dhacdo heerkul aad u sarreeya, farqiga heerkulka waa 2℃ayaa ku filan in ay waxyeelo halis ah u geysato digaagga.
Waqtiga boostada: Agoosto-12-2022
