Waa caado caadi ah in la isticmaalo hawo-qaad toosan si loo qaboojiyo digaagga xilliga xagaaga kulul. Beerista ukunta ee cufnaanta sare leh, xawaaraha dabaysha ee ku jirameel digaag lagu nastoWaa inay gaaraan ugu yaraan 3m/s, xawaaraha dabaysha ee guriga digaagga ee meelaha heerkulka sare iyo qoyaanka sare leh waa inuu gaaraa in ka badan 4m/s si loo helo "saameyn qaboojin dabaysha" oo wanaagsan.
"Saamaynta qaboojinta dabaysha" waxay inta badan tilmaamaysaa xawaaraha dabaysha si loo yareeyo heerkulka jidhka ee digaagga.
Saamayn intee le'eg ayay xawaaraha dabayshu ku yeelan kartaa heerkulka jidhka digaagga?
"Sida laga soo xigtay daraasad ay samaysay Jaamacadda Georgia, xawaaraha dabayshu wuxuu ka kordhay 0m/s ilaa 2.54m/s. Heerkulka jidhka digaagga ayaa hoos u dhici doona in ka badan 6.°C.
Si aan u helo xawaare dabaysha oo dheeraad ah, waxaan ahay habka caadiga ah ee lagu sameeyoguriga digaaggaSaqafka, yaree dhererka qolka digaagga, ama ka kor ilaa saqafka digaagga oo ku teedsan saqafka saddex-xagalka ah si toosan hoos ugu dhig masaafad kasta si aad u rakibto daah dabaysha ama daah dabaysha si loo yareeyo aagga isgoyska ee qolka digaagga si loo hagaajiyo xawaaraha dabaysha ee qolka.
Maxaad tan u samaynaysaa, inta badan sababtoo ah xawaaraha dabayshu si dhow ayuu ula xiriiraa aagga isgoyska eemeel digaag lagu nasto.
Xisaabinta xawaaraha dabaysha ee qolka digaagga ee hawo-qaadashada dheer leh: xawaaraha dabaysha = mugga hawo-qaadashada / aagga isgoyska ee qolka
Waxaa ka cad qaacidadan in si loo kordhiyo xawaaraha dabaysha ee coop-ka, la kordhiyo hawo-qaadashada coop-ka, tusaale ahaan la kordhiyo tirada taageerayaasha cadaadiska taban u adkaysta, ama la yareeyo aagga isgoyska ee coop-ka.
Kordhinta marawaxadaha waxay la macno tahay kordhinta kharashyada, kordhinta isticmaalka korontada, kordhinta kharashyada dayactirka, iyo mustaqbalka fog oo lagu daro kharashyo hawlgal oo muhiim ah shirkadda.
Markaa kordhinta xawaaraha dabaysha waa in laga fiirsadaa yareynta aagga isgoyska eemeel digaag lagu nastoHoos waxaan ku fahmeynaa isbeddellada goobta digaagga ka hor iyo ka dib kordhinta daaha dabaysha xannibaya iyadoo la adeegsanayo xisaabin gaar ah.
Tusaale ahaan: guri digaag ah oo ballaciisu yahay 12m, dhererkiisuna yahay 100m, darbiyada dhinaca ee gurigu waa 2.4m, bartamaha gurigu (kan ugu sarreeya) waa 4.8m, gurigu wuxuu ku rakiban yahay 10 marawaxad oo 50 inji ah, awoodda hawo-qaadista ee taageere kasta oo -50 Pa ah waa 31000m³/h.
Markaas xawaaraha dabaysha ee goobta digaagga waa inuu ahaadaa: xawaaraha dabaysha = mugga hawo-qaadashada / aagga isgoyska = 31000 / 3600× 10 / [12]× (4.8 + 2.4) / 2] = 86.1/43.2 = 1.99m / s
Haddii aan saqafka ama daahyada dabaysha ku rakibno goobta digaagga, si dhererka sare ee goobta ama geeska hoose ee daahyada dhulka uga soo baxo uu u noqdo 3.6m, dhererka labada dhinac ee goobtana uusan isbeddelin, xawaaraha dabayshu waa = 31000/3600×10/[12]×(3.6+2.4)/2]=86.1/36=2.39m/s
Sidaa darteed, marka ay dhacdo tiro isku mid ah oo taageerayaal ah, iyadoo la dhimayo aagga isgoyska ee guriga digaagga ayaa kordhin kara xawaaraha dabaysha iyadoo lagu saleynayo 0.4m/s asalka ah, taas oo ah, waxtarka ayaa kordhay 20%, isbeddellada xawaaraha dabaysha ee ay soo saarto saameynta qaboojinta dabaysha ayaa sidoo kale ka duwan, farqiga u dhexeeya saameynta qaboojinta dabaysha ee u dhiganta heerkulka qiyaastii 2.℃, haddii heerkul aad u sarreeya uu jiro, farqiga heerkulka ee 2℃waa ku filan tahay inay waxyeello daran u geysato digaagga.
Waqtiga boostada: Agoosto-12-2022
