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Hello everyone, in my simulation i use type 619a (Open Feedwater
Heater - Steam Flow Calculated to Achieve User-Designated Outlet). When I click
on the more… button of output 6 (Heat Transfer Rate) it says: “The rate at which energy is added to the
de-aerating heater by the high-temperature steam inlet. The heat transfer rate
is calculated by multiplying the high-temperature steam flow rate by the enthalpy difference between the high-temperature steam
and the entering low-temperature steam (condensate).” In my opinion this difference is wrong. I think the high-temperature
steam flow rate should be multiplied by the enthalpy
difference between the high-temperature steam and mixed outlet steam, because
the high-temperature steam flow can’t “cool down” below the
mixing enthalpy. One consequence is that output 5 (Required Source Steam Flow
Rate) is always too low (according to my test simulation + calculation). I am not 100 % sure about that so any thoughts on
that are well appreciated. Kind regards Martin Bei Fragen bitten wir um Ihren Rückruf. |