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SYSTF~ H%TDRA~LI C ,,,, ~2%LCULATI ONS <br /> <br />STATIC HEAD: <br />(vertical elevation difference from the pump <br />base to the presmure distribution laterals) <br /> <br />.feet <br /> <br />SYSTE~ ALLOWANCE: <br />(includes distribution piping losses and a 5 foot <br />residual head at discharge o£ distribution piping) <br /> <br />10, feet <br /> <br />FRICTION HEAD LOSS: <br />(transport pipe friction loss from flow rate) <br /> <br />(a) <br /> <br />CALCULATE FLOW RATE:' <br />Diameter of orifices <br />Number of orifices (N) <br />Orifice Discharge Rate <br /> <br />(R) <br /> <br />l~ch <br /> <br /> (see over) <br /> <br />N x R -- Flow Rate <br /> (N) <br /> <br />(Gallons per Minute) <br />~GPM <br /> <br />(b) <br /> <br />CALCUI~RTE FRICTION LOSS: <br />Length of transport pipe (L) <br />Friction loss coefficient <br /> <br />= ~_=_feet <br /> <br />L x F <br />100 <br /> <br />(L/lO0) <br /> <br />Friction Head loss in feet <br /> <br />,,~ ~'~?~. feet <br /> <br />4m <br /> <br />TOTA~ DYNAMIC HEAD: <br />(sum of static head, <br />and friction head) <br /> <br />system allowance <br /> <br />CAPACITY: TDH @ GPM, <br /> <br />~TDM <br /> <br />and <br /> <br />*In the absence of specific head loss calculations, use 10 feet. <br /> <br /> <br />