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Posted by Boiler Guy on March 18, 2004 at 09:52:54:
In Reply to: Feedwater Enthalpy posted by hard times on March 18, 2004 at 08:42:14:
: I saw a while back where an engineer showed how they get boiler efficiency. I am missing one part of the equation. I don't know how to get the enthalpy of feedwater. If someone could help me it will be greatly appreciated. Please take into consideration I am not an engineer, so please try to be easy on me and make the response as simple as possible. Thanks.
You can obtain the enthalpy from steam tables but in a nutshell the enthalpy of feedwater at 212 deg F is 180 btu/lb and at 228 deg F from typical 5 psig deaerator is 196 btu/lb.
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