Water Demand.xls 134e1r

TOTAL DEMAND CALCULATION : FOR , NNH Fixtures type

:

private

FIXTURES

Weight in Fixture units Hot Total 0 6

Quantity

Water closet (flush valve)

Cold 6

Water closet (flush tank) Water Bidet

3 0.75

0 0.75

3 1

Hose for W.C

0.75

0.75

1

Lavatory (& H.B., J.S.) Service sink Shower

0.75 1.5 1.5

0.75 1.5 1.5

1 2 2

10

Bath tub Kitchen sink Dishwashing machine Laundry Ablution (Public) Urinal (1" flush valve) Urinal (3/4" flush valve) Urinal (flush tank) Total Fixture Units WATER DEMAND ( GPM ) WATER DEMAND ( m3/ h )

1.5 1.5 0 1.5 1 10 5 3

1.5 1.5 1 1.5 1 0 0 0

2 2 1 2 1.5 10 5 3

3 1 1 1

Total weight in fixture units Hot Total 0 0

0

Cold 0

8 0

24 0

0 0

24 0

0

0

0

7.5 0 1.5

7.5 0 1.5

10 0 2

4.5 1.5 0 1.5 0 0 0 0

4.5 1.5 1 1.5 0 0 0 0

6 2 1 2 0 0 0 0

40.5

17.5

47 27.8 GPM 6.31 m3/h

1

25.0 GPM

12.5 GPM

5.68 m3/h

2.84 m3/h

Assuming Peak factor : Duration :

1.5 60

min

The mean demand Overhead tank size

18.5 556 2.10

gpm gallon m3

(mean demand = peak demand / peak factor ) ( Overhead tank size = (peak demand - mean demand) x duration }

Transfer pump capacity

18.5 4.21 1.17

gpm m3/h l/s

( Transfer pump capacity = mean demand , Assuming one pump running & one standby)