1 / 23

∆H 0 298

∆H T. ∆H 0 298. Reactants. Products. (T). (T). ∆H products = Σ C p (298-T) =- Σ C p (T-298). ∆H reactant = Σ C p (T-298). Reactants. Products. fuel, 상온. [products + H 2 O (g) ]. [products + H 2 O (l) ]. dq. dq = Higher Heating Value = │-∆H L │. Cooling. O 2.

wynne-stanton
Download Presentation

∆H 0 298

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ∆HT • ∆H0298 Reactants Products (T) (T) ∆Hproducts=ΣCp(298-T) =-ΣCp(T-298) ∆Hreactant=ΣCp(T-298) Reactants Products

  2. fuel, 상온 [products + H2O(g)] [products + H2O(l)] dq dq = Higher Heating Value = │-∆HL│ Cooling O2 dq = Lower Heating Value = │-∆Hg│ 미국 우리나라, 중동 HHV = LHV + [latent heat, heat of vaporization] * Latent heat = 44,000J/mole = 9712 Kcal/Kgmole → table 2-3 p.17

  3. *Cp(°K기준):

  4. ex 2-7) Energy Balance • 성분; C6H6 : 70% Excess air : 10% • C : 8.2% Preheating air : 300°C • Ash : 9.3% Heat loss : 5% • H2O : 12.5% Burning rate : 1100Kg/hr Air(300°C) 5% Heat loss 5% Heat loss Combustion Chamber Combustion Chamber Waste (1100Kg/hr) Water 100°C Steam (15.8atm) 180°C Ash 100 Kg of Waste 를 기준, C6H6 : 70% → 70Kg/78 = 0.897Kgmole, C : 8.2% → 0.683 Kgmole Ash : 9.3%, H2O : 12.5% → 0.694 Kgmole 0.897C6H6 + 0.683C + (1.1)x(O2 + 3.76N2) → 6.065CO2 + 2.691H2O + 0.1xO2 + (1.1x)(3.76)N2 For O2, 1.1xO2 = 6.065 + 1.345 +0.1x, x = 7.41 0.897C6H6 + 0.683C + (1.1)(7.14)(O2 + 3.76N2) → 6.065CO2 + 2.691H2O + 0.714O2 + (8.151)(3.76)N2

  5. * 총 수분배출 mole수 : (2.691 + 0.694) Kgmoles/100Kg of waste • * Dry gas moles : 6.065 + 0.741 + (8.151)(3.76) • = 37.5Kgmole/100Kg of waste • *시간당 배출되는 dry gas : (37.5Kgmole/100Kg of waste)(1100Kg/hr) • = 41.25 Kgmole/hr

More Related