Microsoft Word 2012, Källén, M.,-Energy Efficiency Opportunities within the Heat Treatment Industry


  Heat Recovery from Exhaust Gases


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2.5  Heat Recovery from Exhaust Gases 

The possible heat recovery from heat exchanging the exhaust gases has been calculated 

according to: 

 

 



 

 

∆    



 

 

 



 

(5) 


where

 

 is the heat exchanger load



 is the summation of the mass flow times the 

heat capacity for each component and 

∆  is the temperature difference between the gas flow 

before and after heat exchange. In the case of heat exchange with the inlet gases, the new inlet 

temperature was calculated according to: 

 

 



 

 

   



 

 

 



 

(6) 


where 

 is the new inlet temperature and 

 is the gas inlet temperature without heat 

exchanging. 

 

 



 

 

11 



 


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