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Calculation of Increase In operating costs for a building with complete curtain wall no shading Formula

Ihe formula used is as follows

Annual Operating Cost Increase (Chiller plant) - (A « F x H x Dw x Wy ' H • Cf Where

A • Increase in cooling load

I Diversity factor lo allow for changes in sun azimuth and allitudr dunn* a no""

II - Hours o( operation per day (12) Dw Days operation per week (4 4) Wy Wc-rks per year (42)

H Electnclty ($0.24/Kwh) ' e - Chiller Plant Efficiency (0 21 Kw/KwR)

Annual Operating Cost Increase (Fans/Pumps) Amps (PFp . H x Dw < Wy > H> Whece

I'fp Fan/Pump Power Increase

Heme we calculate as follows.

Saving, c hlllei Plant 1JJ ,„ 8 . 1i, 4 4 x 42 x 0 24 x 0 21 VJJVJ* '»avings Ian Power 19 x 1 j x 4 <k x 42 * 02-1 »

■..iving» Pump Powei ■ 15 a 12 x 4 4 x 42 x 0 24 M-'

I /if.yl» v' »••■/■"yflr'u fit*'1, »envftw

v, 'r■» tt*'A*>i I/*'." ■ fyt ''smr* <+W/> 'J^'Ot

'•w" y.Mf.< .- • 1 .. . jmjiv " jfl v .

A ipfui «inj fr . >/»» <-»í, » •» •

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