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boiler eff using direct method

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firefastball

Mechanical
Joined
May 15, 2014
Messages
35
Location
US
Hi,

Can anyone show increase in boiler efficiency using the direct method (output/input) when installing an economizer?

Lets say feedwater temp is without an economizer is around 32C. Installing an economizer would increase it to 50 C (just numbers)
and saturated steam temp is 190 C.

When applying the enthalpy on the output part of the equation and considering the input is constant, I cannot see the increase in efficiency or maybe there is some missing information.

Thanks
 
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