Yeyiphi iNqanaba loBuqhushumbo-bubungqina obuphezulu, BT4 okanye BT6

Ngokwemigangatho kazwelonke yokukhusela ukuqhuma kombane, zombini i-BT4 kunye ne-BT6 ziwela phantsi kweKlasi IIB.

Iqela lobushushu lezixhobo zombane	Ubushushu obuphezulu obuvumelekileyo bezixhobo zombane (℃)	Irhasi/ubushushu bokutshisa (℃)	Amanqanaba obushushu besixhobo esisebenzayo
T1	450	＞450	T1~T6
T2	300	＞300	T2~T6
T3	200	＞200	T3~T6
T4	135	＞135	T4~T6
T5	100	＞100	T5~T6
T6	85	＞85	T6

Nangona kunjalo, i 'T’ Ulwahlulo luphathelele kwiqondo lobushushu lezixhobo zombane ezingenoqhushumba. Izixhobo ezichazwe njenge-T6 kufuneka zigcine ubushushu bomhlaba bungekho ngaphezulu kwe-85°C, I-T5 mayingadluli kwi-100°C, kwaye i-T4 mayingagqithi kwi-135°C.

Ukunciphisa umgangatho ophezulu wesixhobo ubushushu, mancinci amathuba okuba igesi ye-atmospheric ivuthe, ngokwenza njalo siphucula ukhuseleko. Ngenxa yoko, Uqikelelo lobungqina bokudubula kwe-BT6 ludlula olo lwe-BT4.