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_ OSTP Pressure Distribution r�- ��,� <br /> UNIVERSITY �-� i� <br /> Minnesota Poilution Design Worksheet OF MINNESOTA "LL�' ��"�� <br /> Cor�troi A enc ._�.�.�.�,L��.,� <br /> 1 <br /> ProjectiD: ���.09 22 <br /> 1. Select Number of Perforated Laterals in system/zone: � _ ---- <br /> (2 feet is minimum and 3 feet is maximum spncing) """'"`""<""��A <br /> � � � __r f <br /> 2. Select Perforotion Spacin3� 3.0 ft "`\ , _" . ,�'S °<���, �~ - <br /> < ..,.�,�.. <br /> Min'mum <br /> �� 'r.'piyforatio��s a�acea 3'apon _ i'�2'of rock l2' <br /> 3. Select Perjoration Diameter Size 7/32 in _ <br /> -G"ui rocfc � <br /> 4. Length of LnterQls =Media Bed Length-2 Feet. ��fa<<,��o���+��:��.-«'/•' Perfora2bn swcing:2'to 3' <br /> 63 - 2tt = 61 ft Perforation can not be closer then 1 foot from edge. <br /> 5• Determine the Number of Perforation Spaces. Divide the Cength of Lnterais (Line 4)by the Perforation Spacing {Line 2)and <br /> round down to the nearest whole number. <br /> Number of Perforation Spaces = 61 ft - �ft = 20 Spaces <br /> 6. Number of Perforations per Laterai is equat to 1.0 plus the Number of Perforation Spaces (Line 5). <br /> Perforations Per Latera( = 20 Spaces + 1 = 21 Perfs. Per Lateral <br /> Check table below to verify the number of perforotions per loteral guarantees less thon a 10%discharge variation. The va(ue is <br /> double if the a center manifo(d�s used. <br /> 7�4aximum NumbEr o#Pes#oratio�s P�s laierat to Guarantee<t�D�scharge Yan�tion <br /> i,inc P arations 7/32 Inc�Per#oraCions <br /> Perforat:on Spa�i�g iFeet) �P��ame#er dlnchesi Per{oration Spaci� Pipe Qiarr►eter(Inches) <br /> t 1 K 11� 2 3 1Feet 1 1 11� t E§ � 3 <br /> � 10 i3 i8 3Q 60 2 ti ib 2i 3� b$ <br /> Zi:' 8 12 1 b 28 54 2µ 1 Q 14 20 31 6� <br /> 3 8 i2 fb 25 52 3 4 94 t9 30 6Q <br /> 3r'i b l�t+Perfora#iais 9:'8 lrxt�Perferat�ns <br /> Pipe I?iameier�Inchesl Pe;iaratio:�Spacing Pipe D'sameter(Inches) <br /> Pe�atatio�Sp�ng IFeetj <br /> t i� 1�; ? 3 1Fe�t1 1 i� 1Yt 2 3 <br /> 2 12 i8 2b 4�. 87 2 2t 33 �F4 r4 t+#9 <br /> 2ll 12 17 24 40 80 2�C 20 3{? �! 69 #3� <br /> � 12 !b 2� 37 ?5 3 34 29 38 b# 128' <br /> �• Totat Number of Perforotions equals the Number of Perforations per Lateral (Line 6)multiplied by the Number of <br /> Perforoted Leterals (Line 1). <br /> 21 Perf. Per Lateral X �Number of Perf. Laterals = 63 Totat Number of Perf. <br /> 8. Calculate the Square Feet per Perjoration. Recommended value is 4-10 ftZ per perjoration. T PeTiO�"onD#���6PM� <br /> Does not apply to At-Grades PeHonHon Dlametrr <br /> �e.d u�� <br /> ��a ��� v�i ��+ <br /> Bed Area = Bed Width(ft)X Bed Length (ft) �,� o.is o.s� o.sb o.�s <br /> 1.5 0.22 0.51 O.b9 0.9 <br /> 10 ft x 63 ft = 630 ft2 Z� 0.26 0.59 0.� ,.o, <br /> �5 0.�9 o.ds o.� ,.,� <br /> 3.0 0.32 0.72 0.98 1.78 <br /> Square Foot per Perforation =Bed Area divided by the Total Number of Perforations (Line 7). <.o 0.3� o.� ,.,� ,..� <br /> SA` O.N 0.93 t.26 L65 <br /> 2 Oweili�s vnth 3/16 inch co 1/�inch <br /> 630 ft - 63 perforations = 10.0 ftZ/perforations "°°` p�oratfom <br /> Dwelltn�gs with t/8 inch peAoratiorts <br /> 3 feec pther establhhmenu and VSfS vAth 3/76 <br /> 9. Select Minimum Average Head: 1.0 ft incfi to t/a i�h peAora[iom <br /> � 5 f�� Ochcr ataWi,hmmtz and N5T5 with t/8�nch <br /> pcAoratiom <br /> 10. Select Perforation Discharge (GPM)based on Table ili: 0.56 GPM per Perforation <br /> ��• Determine required F(ow Rate by multiplying the Tota!Number of Perforations (Line 7)by the Perforofion Discharge (Line 10). <br />