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Les · 10-03-2005, 05:27 PM

Oh woe.
Since 13th Sept 2002 have been overestimating h(eff) for all channel wbs.
For Production WW : Correction Factor= 0.788 * (0.78774617067833698030634573304158)
For Volenti's wb : Correction Factor=0.948
Predicted h(eff) values for MCW6000 are not effected.

Reason for gross error:
Kryotherm uses Total Fin area, which includes top, front&back, and two-sided "wall fins": 2742 mm^2 for WW
For channel wb the Convection area is "channel fins" + one-sided "wall fin" + "channel base" : 2160 mm^2 for WW
Excuse : first looked at Volenti's wb where factor is 0.948,had ignored and then forgotten about.
In the process of correcting recently posted(this and later) graphs.

* Strictly,correction should be less(factor higher than 0.788) for 3.5x17mm area directly under the slot).

10-03-2005, 05:27 PM	#135
Les Cooling Savant Join Date: Oct 2001 Location: Wigan UK Posts: 929	Oh woe. Since 13th Sept 2002 have been overestimating h(eff) for all channel wbs. For Production WW : Correction Factor= 0.788 * (0.78774617067833698030634573304158) For Volenti's wb : Correction Factor=0.948 Predicted h(eff) values for MCW6000 are not effected. Reason for gross error: Kryotherm uses Total Fin area, which includes top, front&back, and two-sided "wall fins": 2742 mm^2 for WW For channel wb the Convection area is "channel fins" + one-sided "wall fin" + "channel base" : 2160 mm^2 for WW Excuse : first looked at Volenti's wb where factor is 0.948,had ignored and then forgotten about. In the process of correcting recently posted(this and later) graphs. * Strictly,correction should be less(factor higher than 0.788) for 3.5x17mm area directly under the slot).