Laserfiche WebLink
OSTP Pressure Distribution . <br /> -�'� UNIVERSITY '"`� '� <br /> Minnesota Poliution Design Worksheet OF N�INNESOTA ._,.:�''^ +`'��„ <br /> Control A enc ``'��� <br /> Project ID: v 11.09.22 <br /> 1. Selett Number of Perforated Latera(s in system/zone: � ,_------- _ <br /> i.�ww�c<a..�c<.s eo. <br /> (Z feet is minimum and 3 feet is maximum spacing) , __ _ _ _ __ _ _ <br /> ., �,_-� _ <br /> 2. Select Perforation Spacing: ��ft „-" , �. 1z 5p° � _ - <br /> � a.,,�.. <br /> Mrn�mVin <br /> '!�"prrtora�ions sp:�ced 3'ap�rt t"�2'of rnck 12` <br /> 3. Select Perforation Dinmeter Size �in _ _ <br /> 6-oi rock <br /> 4. Length of Laterals =Media Bed Length-2 Feet. P"''°`a"�"s'�`"g:•,`-_°'`.� Pe''"`�"�"��`'"°:2�`a 3• <br /> � - 2ft = �ft Perforation con not be ctoser then 1 foot from edge. <br /> 5• Determine the Number of Perforotion Spnces. Divide the Length of laterats (Line 4)by the Perforntion Spacing {Li�e 2)and <br /> round down to the nearest whole number. <br /> Number of Perforation Spaces = �ft .- �ft = ��Spaces <br /> 6. Number of Perforntions per Latera! is equal to i.0 ptus the Number of Perforation Spaces (Line 5). <br /> Perforations Per Lnternl = �Spaces + 1 = �Perfs. Per Lateral <br /> Check table below to verify the number of perforations per laterat gunrantees less than a 10%discharge variotfon. The value is <br /> double if the a center manifold is used. <br /> Maximum tiumber of P+�rforatioru P�r Lateral to Guarant2e�10§6 Discharge Yariatian <br /> :';In�:h P . a-arans 7/32 Inch Ferforations <br /> Pipe Qiamete��inches� P2rforation Spacing Pipe Uiameter{Inthesl <br /> Ferfsoratron Spac'sng[Feet) <br /> i tY� i1; 2 3 (��1 1 11� t?': 2 3 <br /> Z 14 13 18 30 b0 2 11 1b 21 34 6S <br /> Zts 8 12 15 28 54 2�h 10 14 2Q 32 6�4 <br /> 3 8 !2 4b 25 52 3 9 9A 19 34 64 <br /> 3ji6lnch Pertorations iB inch Ptxforatsans <br /> P'►pf Diam�ter tis�chpsl Ferforation Sp.acing Pipe fliarr►eter(inthes) <br /> ge�E4satu.�n S�acin�{feetl <br /> 1 !� 1� 2 3 (Feet) 1 t� ir: 2 3 <br /> . � 12 t$ 26 46 81 2 3t 3� �9 74 i4'9 <br /> 2�� 12 i7 24 4�0 8� 2� 20 3Q 4f 69 13§ <br /> 3 12 tf, 2? 37 �5 3 20 29 38 b4 128 <br /> 7• Tota!Number of Perforations equals the Number of Perforations per Lateral (Line 6)muttiplied by the Number of <br /> Perforated Laterals (Line 1). <br /> C�Perf. Per Lateral X �-�Number of Perf. Laterals = �_�Total Number of Perf.__- <br /> 8. Calculate the Square Feet per Perforation. Recommended va(ue is 4-10 ftZ per perforation. °i^°""on°'�""`'��GP"� <br /> Poriwation Dtameter <br /> Does not apply to At-Grades �.°"n ,.e ,,,. ',, ',. <br /> Bed Area = Bed Width(ft)X Bed Length(ft) �,o• o.�e o.�� 0.% OJ4 <br /> 1.5 0.22 0-51 0.69 0.9 <br /> ��ftX � ft = ��fL2 zo° o.ze n.ss o.eo +.os <br /> � 2.5 0.29 0.65 0.89 7.17 <br /> 3.0 O.12 0.72 0-98 /-28 <br /> Square Foot per Perforation =Bed Area divided by the Tota(Number of PerforQtions (Line 7). •.o 0.3� 0.83 ,.,3 ,_<� <br /> 5.0` O,If �0.93 7.26 L65 <br /> Dwelli%S with 3/76 incA CO 1/4 iKA <br /> �ftZ ' � perforations = �ftZ/perforations ,r°°` a��o•ei�� <br /> u,.ruc�w;cn,�a incn perrowciorb <br /> 2feet OcherestaWishmenaandMSTSwfth3/76 <br /> 9. Setect Minimum Average Head: C�fL inch to 7Ia ixh peRora[iora <br /> 5 ftt� Ocher geaDtSshroents and N5T5 with t/8 inch <br /> perforatara <br /> 10. Setect Perforation Discharge (GPM)based on Tabte III: �GPM per Perforation <br /> 11• Determine required F(ow Rate by multiplying the Tota(Number of Perforations (Line 7)by the Perforation Discharge (Line 10). <br />