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, �� OSTP Pressure Distribution <br /> Minnesota Poitution UNIVERSITY ,��, <br /> Design Worksheet OF MINNESOTA <br /> Control A ency �``�"�.�" <br /> ProjectlD: v 11.09.22 <br /> 1. Select Number of Perforated Laterals in rystemlzone: � - - -- - <br /> (2 feet is minimum and 3 feet is maximum spacing) �� �����"� ��" <br /> ;:'.o,���„�. ' <br /> 2. Select Perforation Spacing: 3.0 ft � ,, __ <br /> M�n�inu�n " <br /> '/."�����lui:����i�v l�i.��.•il 3':i�i.��� t'_l"�I ro�.k 1)' <br /> 3. Select Perforation Diameter Size 1/4 in _ _ <br /> !�'c�.�ack <br /> 4. Length of Laterals =Media Bed Length -2 Feet. °o"°"""°' ,° `°',°',°°"`,'., ," ' ,' <br /> 50 - 2ft = 48 ft Perforation can not be doser then 1 foot from edge. <br /> 5• Determine the Number of Perforation Spaces. Divide the Length of Latero(s (Line 4)by the Perforation Spacing (Line Z)and <br /> round down to the nearest whole number. <br /> Number of Perforation Spaces = 48 ft .- �ft = 16 Spaces <br /> 6. Number of Perforotions per Lotera( is equal to 1.0 plus the Number of Perforation Spaces (Line 5). <br /> Perforations Per Latera( = 16 Spaces + 1 = 17 Perfs. Per Lateral <br /> Check tab(e below to verify the number of perforations per(ateral guarantees less than a 10%discharge variation. The va(ue is <br /> double if the a center manifo(d is used. <br /> M,a�cimum Numher af P?rfe�atians�er LatEral to G�r,r:tee<:1�Oischarge VaRal'�o€t <br /> ',Inch P arat�ons ?�32 Inch Perforations <br /> Fipe(iie �ter(IncF.e:l F'a�cratio,-,5p�:inQ F7pe CratT?�TEr(tnthesl <br /> P?�t,:raC•o-�Spat'ng iF�tl - <br /> t 1��: S1: 2 3 (F�tl I ty< 11: Z 3 <br /> � tn f3 18 30 5�1 2 tt 16 2t 34 hfl <br /> ��: � i2 16 2? 54 2�: t0 14 �0 32 64 <br /> ? E fi1 16 25 52 3 9 1� 19 30 60 <br /> 3'161nch Perfarations 1.'8 Inch Peffarat�ons <br /> Pipe Dia�t�fl�ches) Fp+-foretion Spa�in� Ftip?C.*arteter((r.c�+es? <br /> FY�crec��n Spacng iFeetl <br /> 1 1!: t'�: 7 3 (t�il 1 ti'< 11: 2 ? <br /> 2 12 18 26 4b 87 2 21 ?3 �3 7�# 144 <br /> ?t= tt 17 14 �� 80 2�: .�� 3C� st �v 131 <br /> ? 12 1h Z2 37 75 3 20 29 38 64 128 <br /> 7• Total Number of Perforotions equals the Number of Perforotions per Loteral (Line 6)muttiplied by the Number of <br /> Perforated Loterafs (Line 1). <br /> 17 Perf. Per Lateral X �Number of Perf. Laterals = 51 Total Number of Perf. <br /> 8. Catculate the Square Feet per Perforation. Recommended volue is 4-10 ft z per perforation. Pe<<°�°"°^°,��h••��°'"� <br /> Does not app(y to At-Grades ! �.ro..no„o�.me«� <br /> He.e,re,I <br /> Bed Areo = Bed Width (ft)X Bed Length(ft) ; '�6 '��� �,_ �. <br /> 1.0' D.16 0.41 0.56 0.7� <br /> 1.5 0.22 0.51 0,69 0.9 <br /> 10 ft x 50 ft = 500 ftZ Z.°° °.� °.5' °.� ,.°' <br /> 2.5 0.29 0.65 0.69 1.17 <br /> 7.0 0.32 0.72 0.96 1.28 <br /> Square Foot per Perforation =Bed Area divided by the Tota(Number of Perforations (Line 7). <.o I o.» o.e= ,.,� ,._� <br /> SA` O.{1 0.93 /.26 1.65 <br /> 50o ftZ - 5� erforations = � Z 1�ooc IC�Iiingvri��>/t6inthtot/4irch <br /> p 9.8 ft /perforations oe o�a��am <br /> Dwellirc�s with 1/B inch pertoratiom. <br /> :feet Other r.eaFAishmenu and�'STS v+ith 3!16 <br /> 9. Select Minimum Average Heod: 1.0 ft iinch to tia inch peAaratbrrs <br /> 5��, CRner rstabtishme�t,and�+STS wich t!g inch <br /> �DeAora�io�tt <br /> 10. Select Perforation Dischorge (GPM) based on Table III: 0.74 GPM per Perforation <br /> 11. Determine required Flow Rote by multiplying the Total Number of Perforations (Line 7)by the Perforation Dischorge (Line 10). <br />