Transcription of บทที่ 5 การอนุรัก ... - dede.go.th
1 5 5-1 5 1.
2 2.
3 5 5-2 ( ) (Equivalent Boiler Capacity) / (Ton/hr) (Japan kg/hr) 1 / 1,000 kg 100oC 1 1,000 / . BHp (USA) 1 212 oF 1 /.
4 / 1 ton/hr = (1, ) = BHp (kJ/hr) = mhfg ( ) m = (kg/hr) hfg = Latent heat of water at atmospheric pressure ( 2,257 kJ/kg ) 5 5-3 (Actual Boiler Capacity) (Catalog)
5 100 oC ( ) 100 oC 10-20 % (Enthalpy) (Enthalpy) (Latent Heat) = fgfghhatmospherehm )( m (kg/hr) hfg (Latent heat) (2,257 kJ/kg) hg (Enthalpy) (kJ/kg) hf (Enthalpy)
6 (kJ/kg) 10 /
7 2 (Actual Evaporation) ( ) 5 5-4 (Equivalent Evaporation)
8 100 oC ( 539 kcal/kg 2,257 kJ/kg) F&A (From&AT) Factor of Evaporation = 539)'(hhG G (kg/h) h (kcal/kg) h ( ) kcal/kg 10 kg/cm2G 50 oC 5 / [ ( )]
9 (hg) 10 kg/ cm2G kcal/kg] = = 5,000 x = 5,700 kg/ [ ] 5,000 x ( 50) 539 5 5-5 = (kg/h, t/h) (kg/h, Nm3/h)
10 = x hg ht 1 7 kg/cm2G 50 C C 9,818 kcal/ 85% 15 / 1 ( ) ( ) = 9,818 x - 50 = kg / 1 1 = 1,000 kg = 1 = x 15 = 1.
