Heat transfer calculations for flue gas condensers
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Gentlemen, these days it’s common to install a condenser behind gas boilers, which significantly reduces the exhaust temperature of the boilers and increases their efficiency to over 100%. I would like to ask if there are any books or calculation standards that can be used for calculating smoke condensation. It seems that many books just copy from one another, and they all deal with steam condensation rather than smoke condensation, so they’re not useful in this context.
There are no standards available for calculating flue gas condensation. Professional publication “Condensing Boilers and Their Systems” ； \"Hierarchical Utilization of Flue Gas Thermal Energy\", as well as some master’s and doctoral theses, can be used as references. But most of the formulas inside are not very practical. I have been working on the design of condensing boilers for several years; when I went to the inspection agency, they all said that for the thermal calculations, I should use your formulas. \"A Study on the Calculation Method for the Reverse Balance Efficiency of Condensing Boilers\" has been approved by the expert panel of \"Industrial Boilers\" and will be published in the coming months. There are many calculation formulas specifically designed for the condensation conditions of natural gas flue gases; stay tuned.
Okay, thank you! Which issue is it? I’ll take a look and learn when the time comes
Good, I can check that. Thanks for sharing
Where can I find these standards and books?
\"Discussion on the Calculation Method of Reverse Balance Efficiency for Condensing Boilers\" was published in \"Industrial Boilers\", Issue 5, 2015. \"Industrial Boilers\" is a renowned journal; it took over a year for this submission to go through expert review, undergo multiple revisions, and be finally published.
I also read “Discussion on the Calculation Method for the Counterbalance Efficiency of Condensing Boilers”; it wasn’t very useful, as the heat transfer calculation for flue gas condensers remains unresolved. How is the poster? Is there a way?
Condensation is a continuous dynamic process; then how can the sensible heat of water vapor during the condensation process be calculated directly? For example, if the initial temperature of the flue gas is 200 degrees and the exhaust gas temperature is 40 degrees, with a dew point of around 55 degrees, how can one calculate the sensible heat of the condensed water vapor between the dew point temperature and 40 degrees? Or rather, how can it be estimated roughly?
I still don’t understand. Could you explain it in more detail? The volumetric pressure of water vapor in the flue gas at the initial and final states of condensation varies.
So you still haven’t explained how to calculate it; voltage division can only be used to calculate the condensation volume, right?
What I originally asked for was a simpler method for estimation, where the error could be larger. But it must be reasonable