[Help] Thermal calculation issue for flue gas heat exchange in gas boilers
Thread Content
Dear experts, for natural gas boilers, the exhaust temperature of the raw flue gas is 100°C. I would like to design a finned heat exchanger to use the raw flue gas to heat the flue gas after desulfurization; the temperature of the flue gas after desulfurization is 45°C, and it needs to be raised to 65°C. The partial pressure of water vapor in the flue gas is 14 kPa, corresponding to a dew point temperature of 53°C. The designed outlet temperature of the raw flue gas is 84°C. Will condensate water be generated when the temperature of the raw flue gas drops from 100°C to 84°C? Is latent heat generated? Below are the calculation results based on the assumption of no condensation water formation. Please help determine whether this design is feasible or not!
The amount of flue gas, as well as the resistance associated with the heated flue gas.