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ANALYSIS IN PIPESACTIVITY 

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Activity 6.1a water filled with solar heater water at 40’C is to be used for

shower in a field using gravi ty dri ven flow. the system includes35m of 1.5-cm diameter galvanised iron piping with fourmiter ends (90’degree) without vanes and a wide-open globe

 valve . if the water is to flow at a flow rate of 1.2L/s through the shower head, determine how much the water level in the

 tank must be from the exit level of the shower. disregard thelosses at the entrance and at the shower head, and neglect the effect of the kinetic energy correction factor.

Based on Table A-3@40’C of Water!  = 0.653x10-3 

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MOODY CHART

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LOSSES FOR RE-ENTRANCE AND EXIT FLOW

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LOSSES FOR BENDS AND BRANCHES

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SUDDENLY EXPANSION

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 TOTAL HEAD LOSSES

Total head loss (general)

Total head loss (D = constant) 

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ACTIVITY 6.3Water at 15’C is drained from a large reservoir using two horizontalplastic pipes connected in series. the first pipe is 20-m long and has adiameter of 10-cm, while the second pipe is 35-m and has 4-cmdiameter. The water level in reser voir is 18-m above the centreline of

 the pipe . the pipe entrance is sharp-edged and the contraction be tween two pipe s is sudden. Neglecting the effect of the k inetic energycorrection factor. determine the discharge rate of water from reservoir.

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Activity 6.1A water fountain is to be installed at a remote located byattaching a cast iron pipe directly to a water main through which

 water flowing at 20’C and 400-kPa (gage). the entrance to the pipeis sharp-edged and the 15-m long piping system involved 90’Degreemiter bends without vanes, a fully open gate valve and an angle

 valve with loss coefficient of 5 when ful ly open. if the system is toprovide water at a rate of 75L/min and the e levation differencebetween the pipe and the fountain is negligible, determine theminimum diameter of piping system.

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