MODULE IV
Condensing boiler technology Page 5

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Exercise 2

Note: Since we are dealing with a condensing boiler, all other fuels can be neglected.


Gas composition [in %]
Component City gas Gas piped over a long distance Natural gas L Natural gas H
Hydrogen H2    
-
-
Methane CH4    
 
 
Carbon monoxide CO    
-
-
Propane, butane, ethane    
 
 
Carbon dioxide CO2    
 
 
Nitrogen N2    
 
 
Oxygen O2    
-
-



Values that express the combustion heat
Fuel
Calorific
value
Ho
[kWh/kg]
Heating value
Hu
[kWh/kg]
Theoretical air requirement
Lmin
[m3/kg]
Carbon dioxide
CO2max [%]
Anthracite coal    
 
 
Coke    
 
 
Dry wood    
 
 
Dry peat    
 
 
Fuel oil EL    
 
 
 
[kWh/m3]
[kWh/m3]
[m3/m3]
[%]
Natural gas L        
Natural gas H        
City gas        
Propane        
Butane        

 

 

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