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� ���.� i� � <br /> � �� OSTP Pressure Distribution <br /> UNI VERSITY <br /> Minnesota PQllution Design Worksheet OF MINNESOTA <br /> Control Agenry <br /> 1. Select Number of Perforoted Latera(s in system/zone: �3� M;,W,,,,m„ <br /> (2 feet is minimum and 3 feet is mvximum spacing) 'r�"cerf���3•�rt• �•or� <br /> 2. Select Perforntion Spacing: 3.0 ft ' �Z�- <br /> 9'of rock <br /> 3. Select Perforation Diameter Size 7/32 inch paiforation zaing:'/�'m v.• <br /> Perforatian dn:2'to3' <br /> 4. Length of Laterals =Media Bed Length-2 Feet. Perforation can not be closer then 1 foot from edge. v 11.05.31 <br /> 57 - 2ft = 55 ft <br /> 5. Determine the Number oj Perforation Spoces. Divide the Length of Laterals (Line 4)by the Perf'oration Spacing (Line 2)and <br /> round down to the nearest whole number. <br /> Number of Perforation Spoces = 55 ft .- �3 �ft = 18 Spaces <br /> 6. Number of Perforations per Lateral is equal to 1.0 plus the Number of Perforation Spaces (Line 5). <br /> Perfnrations Per I�terai = 18 Spaces + 1 = 19 Perts. Per Lateral <br /> Check table below to verify the number af perforations per latera(guarontees less thcn a i0%dischcrge variction. The votue is <br /> double if the Q center manijold is used. <br /> . ,,, . <br /> _ ..... . _... _ <br /> � _ f - - -- �r32. <br /> . <br /> Pe.fo�ation saa�t�eat� ��ian�etsr l6Kissi �etia�ation iipec�e �i�pe�ia�r�eoer{h�asl - <br /> � �raa rn i. a �ffoQc3 a tw t�a z a <br /> . ,�� �p - <br /> � n,.� ..{4'•s4�i���?-�99Ne��''_,.n'�9G�',...��.�.u9terYAM. Fr��"� _.,�?1 �'.',".,F4w ' �..Y;a - <br /> a. <br /> ... .. . . . . . . <br /> . .�, . . . �: i : .. . . , :. <br /> . � <br /> z►4 a �s � se s� � �a i€ �n � �,.i <br /> " ` "' '� �..-•.. t����' `.. ,�f . `�±�;�,�.1���a . t4�q: 4, �....� _ - _ <br /> r . -. <br /> ,. <br /> � :�✓�5�1 Pl1�O�i�7dY6 �/a 1i1G�'Y�.71ttl�6 <br /> Perboration ipacins tFeet) �Tfwmr+ar E�cirsA �+erfacaimn spaciwg p1�ve���� <br /> 8 'ly4 4� 3 3 �FewL'► ! 11i 4Y1 2 S <br /> .z,:��'cu� �::- -car.^�Sr� _',,,.'-�' dT� r.T�-'�Ae-w��}. +� �. L �I' �i - _ _' ' <br /> � .. ...N : ,'�' <br /> ,.,..r��,�_ar....v..hr ..� � �� .•.� � .. <br /> 4 r' E w _� . ' ' ..S+i �. ... .. .. . <br /> _v .. . �.. _ ..... .. <br /> 2ri �R 17 24 �O s[i 2Ys 2D 3� 4� 6iY tH6 - <br /> . , 'a ...c.np_ a�� �e _ ' --... - :�... . _ - _ _ <br /> . . <br /> _ ._.. n.;_ : .y. '��lr <br /> a <br /> '-�"u" _u .__ • ..y�. <br /> • <br /> _._ e . +�if... m f <br /> �,.i 8'��_i4 1l9�c _ ��...�3.^....._".*.:�. .h�:_.._. ....:F„ � - � <br /> 7. Total Number of Perforatians equats the Number of Perforations per Lateral (Line 6)rnultiptied by the Number of <br /> Perforated Lnterals (Line 1). <br /> 19 Perf. Per Lateral X �Number of PerF. Laterals = 57 Total Number of Perf. <br /> 8. Calcutate the Square Feet per Perforation. Recommended value is 4-10 ftz per perforction. <br /> � � hrfm.nw+vuo.5r <br /> Does not apply to At-Grcdes - "�'�R; ,,, •,,� �,�a •�. <br /> Bed Area = Bed Width (ft)X Bed Length(ft) <br /> �: <br /> �s . .m;�i o;st aw o.r' .. <br /> 10 ft X 57 ft = 570 ft2 f �s o:�s :o:e o;n t.xv <br /> Square Foot per Perforotion =Bed Area divided by the Totof Number of Perforations (Line 7). �-o dn �a:n x:� ;,�� <br /> r_� oaiamnys'wltli S��fs 6e1.to,J�,K1; <br /> 570 ft2 - 57 perforations = 10.0 ftZlperforations "�°°` P��n <br /> am[un�wlW�:lte�ir�c4 v�nrRSo�s <br /> 2lae[ herea�[tihmaRsmdi�ASiS�wIN'9H6�. <br /> 9. Select Minimum Avercge Head: 1.0 ft ^c"m*N''"�n�na°'�°� <br /> s:rmz ocner«.bt�nm.ms.ndv+s�ts.w�r�,-aLe�ren <br /> ParfqfCfOru. <br /> 10. Select Perfnration Discharge (GPM)based on Table III: 0.56 GPM per Perforation <br /> 11. Determine required Flow Rate by multiplying the Total Number of Perforations �(Line 7)by the Perforation Disthorge {Line 10). <br /> 57 Perfnrations X 0.56 GPM per Perforation = 33 GPM <br /> i <br />