Université Libanaise Année Universitaire 2014-2015

Faculté De Génie-II Département Mécanique

Roumieh Semestre IX

Sessions

Plomberie

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FAClJLTE DE GENIE

BRA.NCHE II - Roumieh

Date : 25 Novembre 2013

,Duree: Deux beures

Notes: Documents permis

lLxercise _]: (15 points)

EPREUVE DE PLOMBERIE

Dep:artemcnt Mccanique

Semestre IX

What wiII. be the water temperature of a hot water cylinder 300 liters capacity, heated at 60°C, -after 3 consecutive showers,-knowing that for each shower we need 75 liters at 43°C, and the coid water temperature is 20°C?

Exercise 2: (10 p_ oints)

Calculate the boiler capacity for a villa including 4 floors, with neating loads as follow:

-1st floor= 20Kw, 2nd floor= 21550Kcal/h, 3rd floor= 85000Btu/hr, and 4th floor= 1 SOOOJ/s

1

, Iii 'The domestic hot water cylinder volume is 500 Liters and should be heated in 45 minutes.

The cold water temperature is l 5°C, and the storage hot water temperature is 60°C.

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\Ve have 2 typical n::sidential buildings, ec.:

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' Exercise 4:_ ( 45 points)

By considering a residential building of 8 floors, where each floor is one apartrnent including:

a) l\tfaster v.;c :::c 2 lavatories, 1 ·water closet~ 1 bidet, and l :_;hower b) Bedrooms WC= 1 lavatories, 1 ·water closet, 1 bidet, and 1 shower

c) Guest WC= l lavatories, and 1 Water closet

d) Kitchen = 2 sink, and 2 lauridry tray e) Hose bib at main balcony (Db =O .1 Lis)

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f-APT-8

I t--F,PT 7 LAPT-6

} LA?T-5

l rAPT-4

t~APT-3 l-APT-2 ! 1--P.PT-l

I i VIJATEH 1 BOOSTER PUMP I ! TANK I ·~ / -------' ---- __ _J-i.-;x.,;- ;

' ROOF -·---, .. -. - ______ ,, ___ _ I H"4m BTH FLOOR _! ___ __ J H=

4m TfH FLOOR

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l~~=4m 6TH FLOOR -!.H=4m

5TH FLOOR ;

--f H=4m 4TH FLOO~ ~ ··--·~·. -· ··- -- ------ - ----- '··--

! 'H=4m i 3ROFLOOR --r. . . ...... --.. -------! H~4m 2ND FLOOR

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:H:;:4m i 1ST FLOOR

I !H=4fl\

GROUND FLOOR

[H=3m

BASEMENT1

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Each floor level .is 4m height; the ground floor is a reception area, the water tank ".1-nd the booster set are located in basement floor. (For pipes lengths and floors heights refer to

schematic riser) a) Calculate the pipe sizes for the cold water riser following the French code

bf Calculate the domestic hot water storage tank capacity of typical floors based on

ASHRAE standards

c) Calculate the static head of the booster pump to provide a residual pressure of l .5bars at apartment main isolating valve (consider j=O.Olm/m), and define the values of Pct & Pe

d) Indicate the residual pressure at each floor level, and show where the pressure reducing

-valve is required to avoid exceeding a residual pressure of SOP~I

Good Luck

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UNIVERSITE LIBANAISE 0

FACULTE DE GENIE Departemeint CivH

BRANCHE II - Roumieh Semestre IX

"' EPREUVE DE P]~OMBERIE

Date : 29 Novembre 2013

Duree : Deux heures

Notes : Documents permis

Exercise 1: (Spts + lOpts + lOpts + 20pts = 45points)

Say an office building of 10 floors. Each· floor is composed into 4 offices where we have for

each office 1 WC for men and one for women, and each WC includes 1 water closet and 1

lavatory. The office area is around 1 OOsqm, and the total floor area is around 500sqm where I OOsqm are considered as passages, lifts, shafts, etc ...

a) Calculate the total daily consumption for the above described building k.t1owing that the occupancy for offices is 10 persons I 1 OOsqm

b) Draw the section view and the plan view for

the concrete water tank located in basement

floor showing all required reservations. The required

volume is for 5 days consumption. (Consider the

tank width Sm, and the basernent height= 3m.)

c) The water distribution system is designed to be

by gravity. Calculate the required static head of

the lifting pump from basement floor up to roof

water tank, knowing that the pump flow= 0.6L/&

and the friction loss j=O. lm/m

d) Calculate the pipe-diameter:s for each branch of

the gravity riser. to allow minimum residual

pressure of 2m at the floor inlet pipe. BASEMENT WATER TANK

,......-;- ROOF IH:2m WATER

QRAY!T'! UNf. ,/'

LIF71NG LINE ___,.r/

.. GRAVITY LINE / .. LIFTING LINE _,

LIFTINQ,PUMf'

! TANI~ TOP OF ROOP

: -•. H=4m

ROOF ··U'VEL·U-i _____ _

1H::.lim t arNFLOOR

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H.=4'11 I STHfLOOR

LEVEL-5--·-! -----

jH=4rn I 5TrlFLOOR

LEVEL-4 -----+---- -H.::-4m

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