Gawayin kuwa yana daya daga cikin muhimman kayan albarkatun makamashi da ake amfani da su a duniya, kuma fahimtar abun cikin makamashin sa yana da matukar muhimmanci don ingantaccen amfani. Tsofaffin ma'auni guda biyu da aka yi amfani da su wajen auna abun cikin makamashin gawayin sune Gaskiya Calorific Value (GCV) da Net Calorific Value (NCV). Wannan labarin yana binciken hanyoyi mafi sauki na canza GCV zuwa NCV, yana ba da cikakken fahimta game da wadannan ra'ayoyi da muhimmancinsu.
Darajar Haraji na Gaskiya (GCV), wanda aka fi sani da Darajar Zafi Mai Girma (HHV), shine adadin zafin da ake fitarwa lokacin da aka kone wani adadin kwal a cikin cikakken hanya. Wannan ya haɗa da zafin ɓarnar ruwan.
Darajar Zafi ta Kasa (NCV), wanda aka kuma sani da Darajar Zafi mai Kasa (LHV), shine adadin zafi da ake fitarwa a lokacin konewa, ban da zafin da aka ɓoye na ruwa. NCV yana zama mafi dacewa wajen tantance abun cikin makamashi saboda yana nuna ainihin makamashi da za a iya amfani da shi.
Sauya GCV zuwa NCV yana da muhimmanci don:
Juyin daga GCV zuwa NCV yana dauke da la'akari da yawan makamashi da aka rasa sakamakon danshi a cikin kwal. Hanyoyin mafi sauki don wannan juyin sun bayyana a kasa:
Wannan hanyar tana amfani da sauƙin tsarin lissafi don canza GCV zuwa NCV:
\[\text{NCV} = \text{GCV} – (M \times 24.44)\]
Inda:
– NCV shine Ƙimar Calorific Net.
– GCV shi ne Kimar Zafi na Gaba ɗaya.
– M shine kason danshi a cikin kwal.
Wannan hanyar ta yi amfani da wani formul mai empirikal wanda ke ɗaukar la'akari da danshi da abun hydrogen:
\[\text{NCV} = \text{GCV} – (M \times 24.44) – (H \times 9 \times 2.44)\]
Inda:
– H shine kason abubuwan hydrogen a cikin kwal.
Don samun karin kimantawa cikin sauri, za a iya amfani da wani sauƙin kimantawa:
Wannan hanyar tana ɗauka cewa kusan kaso 5% na makamashi yana ɓacewa saboda danshi da abun ƙunshin hydrogen, tana ba da kimanta mai ƙroughan da ya dace don ƙayyade farko.
Canza GCV zuwa NCV yana da matuƙar muhimmanci don tantance ingancin abun cikin makamashi na kwal. Ta amfani da hanyoyin lissafi masu sauƙi, kamar hanyar tsarin asali, hanyar tsarin gwaji, da kuma tsarin kimantawa mai sauƙi, masu ruwa da tsaki na iya yanke shawara masu inganci game da amfani da kwal. Fahimtar waɗannan hanyoyin canzawa yana tabbatar da ingantaccen amfani da makamashi, sarrafa kudade, da kuma kula da muhalli a wajen amfani da kwal.
