Tabiiy gazni yonish hisobi

Tabiiy gazni yonish hisobi.
17-variant.
Quruq gazni tarkibi,%.

CH4^q	C2H6^q	C3H8^q	C4H10^q	C5H12^q	CO2^q	N2^q	∑
89.0	2,0	0,9	1.5	1,9	0,2	5.5	100

Gaz havoning sarf koeffitsienti α=1,2 bo’lgan holatda yoqiladi.Yoqish uchun berilayotgan havo 800⁰ C haroratgacha qizdiriladi.Gazdagi namlik miqdori ω=0,9% deb qabul qilamiz.
1) Quruq gaz tarkibini namlikni hisobga olganda holda ishchi gazga qayta hisoblaymiz.
CH₄^nam= CH₄^q(100-H₂O)/100=89*0,99=88.11%
Gaz tarkibidagi boshqa tashkil qiluvchi gazlar o’zgarishsiz qoladi.
Nam holatdagi ishchi gaz tarkibi,%

CH4^nam	C2H6^nam	C3H8^nam	C4H10^nam	C5H12^nam	CO2^nam	N2^nam	H2O^nam	∑
88.11	2,0	0.9	1.5	0.9	0,2	5.5	1,0	100

2) Gazning yonish issiqligini aniqlash quyidagi formuladan aniqlaymiz:

Q_n =358,2*CH₄^nam +637,5* C₂H₆^nam +912,5* C₃H₈^nam +1186,5* C₄H₁₀^nam +1460,8* C₅H₁₂^nam =36751.972 kDj/nm³ .
3) Nazariy jihatdan yoqilig’ini yoqish uchun talab etiladigan quruq havo miqdorini quyidagi formuladan aniqlaymiz:
L_α =0,0476(2*CH₄^nam =3,5* C₂H₆^nam +5,0* C₃H₈^nam +6,5* C₄H₁₀^nam +8* C₅H₁₂^nam)=9.742
4) Atmosfera havosidagi namlik miqdori d=10 g/kg quruq havo deb qabul qilamiz va namlik hisobga olgan holda nazariy jihatdan talab qilinadigan atmosfera havosini quyidagi formuladan aniqlaymiz:
L_α ^| =1,016* L_α =9.742*1,016=9.898
5) Sarf koeiffitsienti α=1,2 bo’lgan holatdagi havoning haqiqiy sarfini quyidagi formuladan aniqlaymiz:
L_α = α * L_α =1,2*9.7423=11.69
L_α ^| = α * L_α ^| =1,2*9.898=11.877
6) Yonish mahsulotlari tarkibi va miqdorini α=1,2 bo’lgan holat uchun quyidagi formulalar yordamida aniqlaymiz:
V_CO2 =0,01(CO₂^nam+CH₄^nam+2*C₂H₆^nam+3*C₃H₈^nam +4*C₄H₁₀^nam+5* C₅H₁₂^nam)=1.0557 nm³/ nm³
V_H2O=0,01(2*CH₄^nam+3*C₂H₆^nam+4*C₃H₈^nam+5*C₄H₁₀^nam+6*C₅H₁₂^nam+H₂O +0,16*d*L_α)=2.184 (nm³/nm³)
V_N2 =0,01* N₂^nam +0,79* L_α =9.29 (nm³/nm³)
V_O2 =0,21*( α -1)* L_α=0,21*0,2*10,23=0,409 (nm³/nm³)
7) Yonish mahsulotlarining umumiy miqdori (nm³/nm³):
V_α = V_CO2 + V_H2O +V_N2 + V_O2 =1.0557+2.184+89.29+0,409=12.939 (nm³/nm³)
8) Yonish mahsulotlarining umumiy miqdori (%):
CO₂ =( V_CO2 *100)/ V_α=8.154 %
H₂O =( V _H2O *100)/ V_α=16.88%
N₂ =( V_N2 *100)/ V_α=71.802 %
O₂ =( V_O2 *100)/ V_α=3,162 %
Jami:100,0%
nm³ ni kg o’tkazish uchun zichlikka ρ ko’paytiramiz (jadvalga qarang).
9) α=1,2 bo’lganda 100 nm³ gaz yonishi uchun yonish jaroyonining material balansini tuzamiz.


Yonish jaroyonining material balansi

Kirish	kg	Sarf	kg
CH4= CH4^nam* ρ=88.11*0,717 C2H6=C2H6^nam* ρ=2*1,356 C3H8 =C3H8^nam * ρ= 0.9*2,020 C4H10 =C4H10^nam * ρ= 1.5*2,840 C5H12 =C5H12^nam * ρ= 0.9*3,218 CO2 =CO2^nam * ρ=0,2*1,977 N2 =N2^nam * ρ=5.5*1,251 H2O=H2O^nam * ρ=1,0*0.804 Havo O2=197,9*α*ρ= 197,9*1,2*1,429 N2=197,9*α*3,762*ρ= 197,9*1,2*3,762*1,251 H2O=0,16*d*Lα*ρ= 0,16*10*11.69*0,804	63.174 2.712 1.818 4.26 2.8962 0,3954 6.8805 0,804 339,8 1117.64 15.03	CO2 = VCO2 *100* ρ= 1,0557*100*1,977 H2O =V H2O *100* ρ= 2.184*100*0,804= N2 =VN2 *100* ρ= 9.29*100*1,251= O2 =VO2 *100* ρ= 0,409*100*1,429 Nomutanosiblik	208.71 175.59 1162.179 58.4461 -49.5
Jami:	1555.41	Jami:	1604.92

Balansning nomutonisibligi:(100*0,495)/1555.41=0,0318 %