3-amaliy mashg‘ulot issiqlik sig‘imiga doir masalalar

5.CO₂ gazi uchun Cpm va C'pm 400 – 1000 ⁰C oralig‘i uchun topilsin. Sig‘imni temperaturaga bog‘liqligi chiziqli emas.
J: C_pm =? C'_pm =?
6. O‘zgarmas bosimda azot uchun 200-800 ⁰C temperatura oralig‘idagi o‘rtacha massaviy issiqlik sig‘imini aniqlang. Sig‘imni temperaturga bog‘liqligi chiziqli emas. Javobni kJ/(kg.grad) va kkal /(kg.grad) da bering.
J: C_vm=?
7. Havo o‘zgarmas bosimda 1000 ⁰C dan 100 ⁰C gacha soviyapti. 1 kg havodan qancha issiqlik miqdori yo‘qotilyapti? Masalani havoning issiqlik sig‘imi o‘zgarmas hamda sig‘imni temperaturaga bog‘liqligini hisobga olgan xollar uchun yechilsin. Birinchi xol uchun nisbiy xato aniqlansin. Javoblar kJ/kg va kkal/kg da berilsin.
J: Q_p=?
? 8. Gazlar aralashmasining hajmiy tarkibi quyidagicha:
CO₂=0,12; O₂=0,07; H₂O=0,06. Agar aralashma 100 ⁰C dan 300 ⁰C gacha isitilsa, o‘rtacha massaviy issiqlik sig‘imini (Cpm) aniqlang.
J:Cpm=?
9. Gaz turbinasining regenerativ isitkichida havo 150 ⁰C dan 600 ⁰C gacha qizdirilmoqda. Havoning sarfi 360 kg/soat bo‘lsa, havoga vaqt birligi ichida berilgan issiqlik miqdorini aniqlang. Sig‘imni temperaturaga bog‘liqligi chiziqli emas deb hisoblang.
J: Q=?
Haqiqiy va o‘rtacha mol issiqlik sig‘imlari uchun interpolyatsion formulalar.
3-jadval

Gaz	Haqiqiy mol issiqlik sig‘imi (P=const) Cp,kJ/ (kmol.grad)	O‘rtacha mol issiqlik sig‘imi (P=const) Cpm,kJ/ (kmol.grad)	Haqiqiy mol issiqlik sig‘imi (P=const) Cp,kkal/ (kmol.grad)	O‘rtacha mol issiqlik sig‘imi (P=const) Cpm,kkal/ (kmol.grad)
0-1000 ^0C oralig‘ida
O2	Cp=29,5802+ 0,0069706t	Cpm=29,208 +0,00400717t	sr=7,0651 +0,016649t	Cpm =6,9762+0,0009725t
N2	Cp =28,5372 +0,0053905t	Cpm =28734 +0,0023488t	Cpm =6,8160 +0,0011875t	Cpm =6,8630 +0,0005610t
CO	Cpm =28,7395 +0,0058862t	Cpm =28,8563 +0,0026808t	Cpm =6,8643 +0,0014059t	Cpm =6,8922+ 0,0006403t
Havo	Cpm =28,7558 +0,0057208t	Cpm =28,8270 +0,0026808t	Cpm =6,8682 +0,0013664t	Cpm =6,8858+0,0006468t
N2O	Cpm =32,8367 +0,0116611t	Cpm =33,1494 +0,6052749t	Cpm =7,8429 +0,0027852t	Cpm =7,9176 +0,0012599t
SO2	Cpm =42,8728 +0,0132043t	Cpm =40,4386 +0,0099562t	Cpm =10,240 +0,0031538t	Cpm =9,6586 +0,0023780t
0-1500 0C oralig‘ida
N2	Cp =28,3446 +0,0031518t	Cpm =28,721 +0,0012008t	Cp=6,7700 +0,0007528t	Cpm =6,8599 +0,0002868t
SO2	Cp =41,3597 +0,0144985t	Cpm =38,3955 +0,0105838t	Cpm =9,8786 +0,0034629t	Cpm =9,1706 +0,0025279t

O‘rtacha massaviy va hajmiy issiqlik sig‘imlari uchun interpolyasion formulalar.
4-jadval

Gaz	Massaviy issiqlik sig‘imi, kJ/kg.grad	Hajmiy issiqlik sig‘imi, kJ/m^3.grad	Massaviy issiqlik sig‘imi, kkal/kg.grad		Hajmiy issiqlik sig‘imi, kkal/m^3.grad
0-1000 ^0C oralig‘ida
O2	Cpm=0,9167 +0,00012724t	C'pm=1,3046 +0,00018183t	Cpm =0,2180 +0,00003039t	C'pm =0,3116 +0,0004313t
	Cvm =0,6527 +0,0001253905t	C'vm=0,9337 +0,00018183t	Cvm =0,1559 +0,00003039t	C'vm=0,2230 +0,000043430t
N2	Cpm =1,0258 +0,00008382t	C'pm =1,2833 +0,000010492t	Cpm =0,2450 +0,00002002t	C'pm =0,3065 +0,00002506t
	Cvm =0,7335 +0,00008382t	C'vm =0,9123 +0,000010492t	Cvm =0,1741 +0,00002002t	C'vm =0,2179 +0,00002506t
CO	Cpm =1,0304 +0,00009575t	C'pm =1,2883 +0,000011966t	Cpm =0,2464 +0,00002287t	C'pm =0,3077 +0,00002858t
	Cvm =0,7335 +0,00009575t	C'vm =0,9173 +0,00011966t	Cvm =0,1752 +0,00002287t	C'vm=0,2191 +0,00002858t
Havo	Cpm =0,9952 +0,00009349t	C'pm =1,2870 +0,00012091t	Cpm =0,2377 +0,00002233t	C'pm =0,3074 +0,0000888t
	Cvm =0,7084 +0,00004349t	C'vm =0,9161 +0,00012091t	Cvm =0,1692 +0,00002233t	C'vm =0,2188 +0,00002888t
H2O	Cpm =1,8401 +0,00029278t	C'pm =1,4800 +0,00023551t	Cpm =0,4395 +0,00006993t	C'pm =0,3535 +0,00005625t
	Cvm =1,3783 +0,00029278t	C'vm =1,1091 +0,0002355t	Cvm =0,3292 +0,00006993t	C'vm =0,2643 +0,00005625t
CO2	Cpm =0,6314 +0,00015541t	C'pm =1,8472 +0,00004547t	Cpm =0,1508 +0,00003712t	C'pm =0,4412 +0,00001086t
	Cvm=0,5016 +0,00014441t	C'vm =1,4763 +0,00004547t	Cvm =0,1198 +0,00003712t	C'vm =0,3526 +0,00001086t