Technical assistance: Method for calculating the evaporation rate of circulating water
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This post was last edited by hesonchang214 on 2011-5-23 22:18. Dear experts: I would like to ask how to calculate the evaporation rate in a recirculating water system, given the flow rate and temperature difference
This post was last edited by hesonchang214 on 2011-5-23 22:20. The concentration ratio is primarily controlled by forced wastewater discharge. The forced wastewater discharge volume (Qb) can be calculated from the evaporation volume (Qe), the loss volume (Qw, approximately 0.5‰ of Q), and the concentration factor (N). N = Qm / (Qb + Qw) (m3/h). Here, Qm represents the amount of water to be added. Qe can be approximated using the following formula: Qe = Q · ΔT / 580 (m3/h). In this formula, Q refers to the volume of water in circulation. Therefore, Qb = Qe / (N – 1) – Qw (m3/h)
This post was last edited by hesonchang214 on 2009-6-30 08:45. Please refer to this post: http://bbs.hcbbs.com/viewthread.php?tid=264272. It is recommended that everyone search first before creating a new post; many basic topics are already discussed in the forum. I hope that people will think carefully before posting, so as to encourage more active contributions from others.
This post was last edited by hesonchang214 on 2011-5-23 22:20. I have an empirical formula: evaporation volume = total amount of circulating water × (return water temperature – supply water temperature) × K. Here, the value is 0.0013 in spring and autumn, 0.0015 in summer, and 0.001 in winter, which is basically consistent with actual values!
This post was last edited by hesonchang214 on 2011-5-23 22:18. Thank you, guys, for your help!
This post was last edited by hesonchang214 on 2011-5-23 22:19. It’s very much needed; thank you all! ~
This post was last edited by hesonchang214 on 2011-5-23 22:19. I have no idea how this empirical formula was derived; it’s really frustrating!
This post was last edited by hesonchang214 on 2011-5-23 22:19. Thank you!
This post was last edited by hesonchang214 on 2011-5-23 22:20. Learned it! It seems like a lot is used!
The total heat is obtained by multiplying the amount of water added by the specific heat of water. Then divide by the heat of vaporization of water. This is the most scientific way of calculation.
Great, it solved my urgent problem. Thank you