With utilisation of calorific value, not only the sensible heat which is directly linked to the temperature but also the condensation heat (latent heat) bound in the water vapour is partially extracted from the flue gas.
Info on Enthalpy
This produces acidic flue gas condensate which must be neutralised. Corrosion resistant materials are therefore necessary in these heat exchangers, downstream exhaust pipes and the chimney.
Info on Water disposal – flue gas condensate
The standalone stainless steel flue gas heat exchangers are supplied as preassembled modules. They are therefore suitable both for new systems and also for retrofitting to existing systems.
Info on Condensing heat exchanger
Condensing heat exchanger
Simplified flow diagram of a steam boiler system with integrated economiser and downstream condensing heat exchanger
Integrated economiser (steel)
Condensing heat exchanger (stainless steel)
Flue gas bypass flap
Technical report: utilisation of calorific value