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Re: [EnergyPlus_Support] Re:one error in Engineering Ref.



Yes, I have tested the result. The code is right.

On Tue, Feb 2, 2010 at 11:48 AM, Tianzhen Hong <thong@xxxxxxx> wrote:
 

Jia,

Thanks for pointing it out. We will correct the document. The EnergyPlus
code is fine -

IF (SkyClearness > 3.0d0) THEN ! Sky is average of clear and clear turbid
SkyWeight = MIN(1.0d0,(SkyClearness-3.d0)/3.d0)
ISky1 = 1
ISky2 = 2
ELSE IF (SkyClearness > 1.2d0) THEN ! Sky is average of clear turbid
and intermediate
SkyWeight = (SkyClearness - 1.2d0)/1.8d0
ISky1 = 2
ISky2 = 3
ELSE ! Sky is average of intermediate and overcast
SkyWeight = MIN(1.0d0, MAX(0.0d0, (SkyClearness-1.d0)/0.2d0,
(SkyBrightness-0.05d0)/0.4d0))
ISky1 = 3
ISky2 = 4
END IF

Linda,

This is what Jia found -


a small error in Engineering Reference, page 152 (PDF 191), for S(is,os)
calculation formula, the number *"4"* in the right side of this
formula should be *"0.4".* It took me some time to find this.

Tianzhen




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