In large boilers usually only carbon monoxide can be found in significant amounts in flue gases. Assuming that flue gases contain only these two gases the losses [kW]can be calculated as: L1 = m& CO H l CO + m& H 2 H l H 2 (9) where m& CO is the mass flow of carbon monoxide [kg/s] m& H 2 the mass flow of hydrogen H l CO the lower heating value (LHV) of carbon monoxide (1012 MJ/kg) and
carbon dioxide CO 2 - 13%. water vapor H 2 O - 11%. Temperature [ O C] c p [kJ/kgK] [kg/m3] *10 6 [Pa*s] *10 6 [m2/s] 0.0. 1.042.
Apr 15 2020 · The volume of dry flue gases V fg d produced during coal combustion with composition presented in Table 2 can be calculated using the equation: (1) V fg d = V CO 2 + V SO 2 + V N 2 + V O 2 where the volume fraction of individual gas components (CO 2 SO 2 N 2 and O 2) was determined on the basis of the elemental composition boiler operating parameters and the following formulas: (2) V CO
This same calculation method can also be used to determine the volume at some other set of conditions. To convert mass flow to volume use the following equation: Where: = mass flow in lbs/min R = Universal Gas Flow Constant (1545 ft lbf/(lb mol)(°R)) divided by M.W. T = Gas Temperature in °R (°F + 460)
FGT = flue gas temperature ºF CAT = combustion air temperature ºF HHV = higher heating value of fuel Btu/lb. CO 2 and O 2 = percent by volume in the flue gas N 2 = 100 CO 2 O 2 C and S = weight fraction in fuel analysis. Minimizing excess air reduces dry flue gas losses. Loss due to moisture from the combustion of hydrogen (LH)
Mar 17 2015 · [Steam Property Calculator] => Specific Enthalpy = 494.7 btu/lbm; Blowdown Energy Flow = Specific Enthalpy * Mass Flow [ Blowdown Energy Flow = 1109 = 494.7 btu/lbm * 2.1 klb/hr] Step 4: Determine Boiler Energy. Boiler Energy = Steam Energy Flow + Blowdown Energy Flow -
In general the following formulas have been developed to determine the amount of air required for any boiler room with a package firetube boiler firing gas or oil fuels. 1. Combustion Air = HP* x 8 CFM/HP = 2. Ventilation Air = HP* x 2 CFM/HP = 3. Total Air Required = HP* x 10 CFM/HP = *HP refers to the total maximum