mechanical system for al- rehan hospital
DESCRIPTION
Mechanical System For AL- Rehan Hospital. Supervisor Students Dr. EYAD ASSAF Muhammad Shalan Muhammad Jitan JehaD Odeha JehaD Zuhd. Objective. - PowerPoint PPT PresentationTRANSCRIPT
Mechanical System For AL-Rehan Hospital
Supervisor Students
Dr. EYAD ASSAF Muhammad Shalan Muhammad Jitan JehaD Odeha JehaD Zuhd
Objective
The objective of this project is to design Conventional (HVAC) System (Fan coil units with chiller and Boiler ) for AL-Rehan Hospital.
In addition with all recommended mechanical systems that should contain like (potable water, drainage, medical gases and fire fighting) systems.
HVAC
HVAC (heating, Ventilation, and Air conditioning) is the technology of indoor and automotive environmental comfort. HVAC system design is a major sub discipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer. Also the mechanical systems are to be introduced in our research including potable, drainage, firefighting and medical gases.
Building Description
Location Country: Palestine . City: Ramallah Region: Dahyet Al-Rehan. Elevation: 800 m above sea level. Latitude: 32 N. Wind’s speed in Ramallah is above 5 m/s.
Al-Rehan Hospital consist of tenth floor ,four Basement Floor , Ground Floor and Five Up Floor and each Floor has approximately 1500 m^2
Inside and Outside Design Conditions
Parameter Tin To Tun Tg Φin Φout Win Wout
Winter 22 4.7 13 9.7 50% 70% 8.4 3.9
Summer 24 30 28 29 70% 52% 8.4 13.7
Overall Heat Transfer coefficient,Uoverall
Overall heat transfer coefficient depends on the construction of the unit. To find the overall heat transfer coefficient , the construction was taking in consideration because Uoverall control with the quantity of losses by wall , ceiling , ground , windows and doors.
Uoverall is given by:
U= 1/Rtot R tot = Ri + R + Ro
R= ∑ x/K
External walls construction
composition thickness K(w/m.C) R th
firm stone 0.1 2.2 0.0455
concrete ( light ) 0.1 1.75 0.0571
insulation (polystyrene) 0.03 0.04 0.7500
cement brick(air gap) 0.1 0.72 0.1389
cement plaster 0.02 1.2 0.0167
sum 0.35 1.0082
Ri 0.12 Ro 0.03
Ri = 0.12 m2.C\WRo= 0.03 m2.C\WRtot= Ri+Rw+RoRtot=0.12+1.0082+0.03 =1.18814 (m^2).C/WU=0.8634 W/(m^2).C
Internal walls construction
Material Thickness (m) Thermal conductivity
"K"(W/m.C’’)
Thermal resistance
"R" (m2.C/W)
Plaster 0.02 1.2 0.01666
Block 0.1 0.72 0.13889
Plaster 0.02 1.2 0.01666
Sum 0.14 0.17221
Ri = 0.12 m2.C\WRo= 0.03 m2.C\WRtot= Ri+Rw+RoRtot=0.12+0.17221+0.03 =0.41221 (m^2).C/WU=2.4259 W/(m^2).C
Ceiling Construction
composition thickness K(w/m.c) R th
asphalt 0.02 0.8 0.0250
concrete ( light ) 0.05 1.75 0.0286
insulation (polystyrene) 0.03 0.04 0.7500
concrete ( light ) 0.03 1.75 0.0171
cement brick(air gap) 0.17 0.72 0.2361
cement plaster 0.02 1.2 0.0167
sum 0.32 1.0735
Ri 0.1 Ro 0.02
Ri = 0.12 m2.C\WRo= 0.03 m2.C\WRtot= Ri+Rw+RoRtot=0.12+0.17221+0.03 =0.41221 (m^2).C/WU=2.4259 W/(m^2).C
Windows and Doors
U overall for windows and doors taken directly from energy efficient building code as follow:
Windows double glasses with aluminum material type, wind speed more than 5 m/s
Uwindow = 3.5 W/m2.C. Doors with wood material type without storm
door , wind velocity more than 5 m/s Udoor = 2.4 W/m2.C
Summary
Type Overall heat transfer coefficient (w/m2.k)
External Walls 0.8634
Internal Walls 2.4259
Ceiling 0.83788
Windows 3.5
Doors 2.4
The value of the overall heat transfer coefficient for each element construction
Heating Load Calculation
PROCEDURES
Select inside design condition Temperature, relative humidity(Tin, Φin).
Select outside design condition Temperature, relative humidity(Tout, Φout).
Select unconditioned temperature(Tun). Find over all heat transfer coefficient Uo for wall, ceiling, floor, door,
windows, below grade. Find area of wall, ceiling, floor, door, windows, below grade. Find Qs conduction. Find V inf , V vent . Find Qs, QL vent, inf. Find Q domestic hot water. Find Q boiler.
EQUATIONS Q = U* A* ( Ti - To ) Vvent = n * value of ventilation
Vinf = (ACH * inside volume *1000) /3600
Qs)vent , inf= 1.2 Vvent,inf*(Ti-To)
Ql)vent , inf = 3 Vvent,inf*(Wi-Wo).
Qw = (Mw *cp*(Th – Tc ))/∆t
Unconditioned Temperature In summer
Tun = Ti+2/3*( To - Ti )
Unconditioned Temperature In winter
Tun = Ti+0.5*( Ti - To )
Sample Calculation
Single Room ( 1 ) Specification Area of outside wall = 14 m²Area of unconditioned wall = 32.2 m²Area of window is = 1.8 m²Ceiling area = 18.6 m²
Conduction heat gainQs = U*A*∆TQ.ext = 0.8634*14*17.3 = 209.11548
Watt.Q. un = 2.4259*32.2*8.65 = 675.686 Watt.Q cel. = 0.8379*18.6*17.3 = 278.01
Watt.Qs.cond = Q.ext + Q.un + Q.cilling Qs.cond= 1268.5 Watt.
Ventilation and Infiltration heat gainQ.s.ven =1.2*5*18.6 *17.3 = 1930.068 Watt Q.tot = 1268.5 + 1930 = 3199.18 Watt
Room Qs, cond. (W) Qs, vent. (W) Q tot ( W )
Single Room (1) 1268.500 1930.68 3199.180
Single Room (2) 1031.932 1972.2 3004.132
Single Room (3) 1133.207 2179.8 3313.007
Single Room (4) 1322.810 1951.44 3274.250
Single Room (5) 855.860 1868.4 2724.260
Single Room (6) 1015.360 1837.26 2852.620
Single Room (7) 1025.506 1909.92 2935.426
Single Room (8) 1141.954 1764.6 2906.554
Single Room (9) 1369.834 3217.8 4587.634
Single Room (10) 994.378 1349.4 2343.778
Single Room (11) 979.446 2366.64 3346.086
Double Room(1) 1504.825 2449.68 3954.505
Double Room(2) 1092.185 2460.06 3552.245
Double Room(3) 825.418 2439.3 3264.718
Double Room(4) 828.317 2460.06 3288.377
Double Room(5) 828.317 2460.06 3288.377
Double Room(6) 915.001 2449.68 3364.681
Double Room(7) 1151.699 2003.34 3155.039
Double Room(8) 1411.993 2179.8 3591.793
Double Room(9) 2192.196 2875.26 5067.456
Double Room(10) 1197.415 2875.26 4072.675
Double Room(11) 1197.415 2875.26 4072.675
Double Room(12) 1197.415 2875.26 4072.675
Double Room(13) 1197.415 2875.26 4072.675
Double Room(14) 1197.415 2875.26 4072.675
Double Room(15) 1197.415 2875.26 4072.675
Double Room(16) 1197.415 2875.26 4072.675
Main Carador (1) 11821.867 2179.8 14001.66718
Main Carador (2) 7002.546 9861 16863.54555
Small Corridor 10697.957 11781.3 1083.343404
Doctor Office(1) 1193.740 830.4 2024.139877
Doctor Office (2) 255.751 1557 1301.248564
Lounge 13496.776 1141.8 14638.57615
Lounge (1) 9479.012 11729.4 2250.388031
Male Change 152.639 1671.18 1823.818852
Female Change 1182.815 1245.6 2428.41484
Nurse Station 34.634 1557 1522.36566
Waiting 14371.783 1245.6 15617.38301
Suite Room 6895.487 11418 4522.512811
Clean & Dirty UT. 1080.020 3363.12 2283.099753
Sum 127492.200 2003.34 129495.540
Total Heating Loads
Boiler Selection
Boiler specification
Domestic hot water load 145.03 KW Heating Load 834.4 KW Boiler Capacity = 1077.37 KW Annual fuel consumption of diesel is
154.86 cubic meter per year .
From Obrien boilers Company Catalogue
we chose
REX K120 F with capacity of 1200 KW
Pump Specification
Pump Selection
Required pump for boiler have the following specification
pump head 149.75PSI . pump flow rate 20.14 L/s.
From WILO catalog we chose NL 50/315-45-2-12-50Hz series .
Expansion Tank
From Wessels Company Catalogue depending on pump flow rate(20.17 L/s) (319.7 GPM )we select TXA 1400
Coaling Load Calculation EQUATIONS For Ceiling: Q=U*A*(CLTD)corr
(CLTD)corr = (CLTD + LM) K + (25.5 – Ti )+ (To – 29.4)
CLTD: cooling load factor K:color factor
K=1 dark color K=0.5 light color
For Walls: Q=U*A*(CLTD)corr
(CLTD)corr =(CLTD + LM) K + (25.5 – Ti )+ (To – 29.4)
K=1 dark color K=0.83 medium color K=0.5 light color
For Glass • Heat transmitted through glass Q=A*(SHG)*(SC)*(CLF)
SHG: solar heat gainSC: shading coefficientCLF: cooling load factor
• Convection heat gain Q=U*A*(CLTD)corr
For people Qs=qs*n*CLF qL=qL*n
Qs,QL: sensible and latent heat gain
qs,qL: sensible and latent gains per person
n: number of people
CLF: cooling load factor
For lighting Qs=W*CLF
W:lighting capacity: (watts)
For equipments Qs=qs*CLF QL=qL
Sample Calculations For Single Room (1)
Area of outside wall = 14 m² Area of unconditioned wall = 32.2 m² Area of window is = 1.8 m² Ceiling area = 18.6 m²
Sensible and latent heat gain for one person from table (A-16). Qs = 71.5 W QL= 57 W
Sensible heat gain Qs in, wall = U x A x (CLTD) correct = 90.58 W
Transmission heat gain (window) = 51.86 W
Convection heat gain = U*A*CLTD.corr = 63.63 W
Convection heat gain U*A*CLTDcorr = 63.63 W
Load from ventilation and infiltration Qs vent/inf = 1.2*Vvent* ∆t = 1.2*75.8*7.4 = 669.6 W QL vent = 3*Vvent*(Wi-Wo) = 3*75.8*6.5 =1478.7 W
Heat load due to people Qs = qs*n*CLF = 70*1*0.84 = 62.3 W Ql = ql*n = 44*1 = 44 W
Heat load due to lighting Qs/l = Aroom*CLF= 279 * 0.85 = 237.15 W
Heat load due to equipment Qs = 522 W QL = 0 W
Total sensible load ∑Qs = 1826.87 W
Total latent load = ∑Ql = 1522.7 W Total load = 3349.3 W
Total heat loss for every room
Room Qs (W) Ql (W) V vent(L/S) total loss (W) Total loss (KW)
single Room (1) 1826.592 1522.700 93 3349.292 3.349292192
single Room (2) 1826.592 1522.700 93 3349.292 3.349292192
single Room (3) 2044.952 1697.600 106 3742.552 3.74255162
single Room (4) 2056.090 1729.400 106 3785.490 3.785489612
single Room (5) 1973.243 1729.400 106 3702.643 3.702643136
single Room (6) 1973.243 1729.400 106 3702.643 3.702643136
single Room (7) 1973.243 1729.400 106 3702.643 3.702643136
single Room (8) 1914.915 1586.300 97 3501.215 3.501215208
single Room (9) 2977.166 2556.200 158 5533.366 5.533365593
single Room (10) 1423.985 1077.500 65 2501.485 2.501485446
single Room (11) 2078.175 1872.500 115 3950.675 3.950674551
Double Room(1) 2495.337 1972.150 118.5 4467.487 4.46748684
Double Room(2) 2180.071 1916.500 115 4096.571 4.096570996
Double Room(3) 2250.171 1996.000 120 4246.171 4.246171331
Double Room(4) 2217.267 1956.250 117.5 4173.517 4.173516713
Double Room(5) 2223.848 1964.200 118 4188.048 4.188047636
Double Room(6) 2239.155 1980.100 119 4219.255 4.219255033
Double Room(7) 1856.390 1646.200 98 3502.590 3.502589527
Double Room(8) 2091.395 1813.150 108.5 3904.545 3.904544581
Double Room(9) 2977.166 2556.200 136.5 5533.366 5.533365593
Double Room(10) 2406.834 2258.350 136.5 4665.184 4.665184295
Double Room(11) 2406.834 2258.350 136.5 4665.184 4.665184295
Double Room(12) 2406.834 2258.350 136.5 4665.184 4.665184295
Double Room(13) 2406.834 2258.350 136.5 4665.184 4.665184295
Double Room(14) 2406.834 2258.350 136.5 4665.184 4.665184295
Double Room(15) 2406.834 2258.350 136.5 4665.184 4.665184295
Double Room(16) 2406.834 2258.350 136.5 4665.184 4.665184295
main carador (1) 8525.349356 8212.5 475 16737.849 16.73784936
main carador (2) 10079.85487 9683.25 567.5 19763.105 19.76310487
small corridor 842.7729144 724 40 1566.773 1.566772914
doctor office(1) 905.9443758 942.35 56.5 1848.294 1.848294376
doctor office (2) 1284.654163 1260.35 76.5 2545.004 2.545004163
lounge 8896.114346 9423.5 565 18319.614 18.31961435
lounge (1) 1426.585152 1367.95 80.5 2794.535 2.794535152
male change 1170.207282 1042 60 2212.207 2.212207282
female change 1483.107832 1280.5 75 2763.608 2.763607832
nurse station 1061.858482 1042 60 2103.858 2.103858482
waiting 10223.29997 9625 550 19848.300 19.84829997
suite room 2850.42717 2619.8 162 5470.227 5.47022717
clean & dirty UT. 1432.41827 1578.35 96.5 3010.768 3.01076827
Sum 79800.756 71924.400 6022 151725.156 151.7251557
FLOOR Q total ( kW ) Mass Flow Rate(L/s)
B4 59.1 2.35645933
B3 71.7 2.858851675
B2 157.16 6.266347687
B1 143.42 5.718500797
GF 172.69 6.885566188
1 130 5.183413078
2 152.89 6.096092504
3 116.2 4.633173844
4 116.2 4.633173844
5 150.7 6.00877193
SUM 1270.06 50.64035088
Chiller Selection
Building Load = 1270.06 kW OR 362.87 T.R
From PETRA Company we select APSa 385 – 3S AC1 50 Hz. with 385 Ton. Refrigeration cooling
load capacity .
Pump Selection
Friction loss = 66.17 PSI Fitting loss = 33.08 PSI Head loss = 50.49 PSI.
Pump head = 149.75 PSI Pump Flow rate = 50.64 L/s
From WILO catalog we select SCP 150/580HA series.
Pressure Tank Selection
From Wessels Company Catalogue depending on Pump flow rate (19.44 L/s) (308 GPM) the suitable pressure tank FXA-1200
Fan Coil Unit
For Single Room (1)
Cooling Load = 3.35 KW V cir. = 465.17 L/s V c.f.m = 1023.34 CFM From Petra Catalogue we select
DCC 20 H/C 4Rows Model
F.C.U # Load (CFM) Model
F.C 1 1023.394837 DCC 20 H/C 4Rows
F.C 2 1023.394837 DCC 20 H/C 4Rows
F.C 3 1143.55744 DCC 20 H/C 4Rows
F.C 4 1156.677381 DCC 20 H/C 4Rows
F.C 5 1131.36318 DCC 20 H/C 4Rows
F.C 6 1131.36318 DCC 20 H/C 4Rows
F.C 7 1131.36318 DCC 20 H/C 4Rows
F.C 8 1069.815758 DCC 20 H/C 4Rows
F.C 9 1690.750598 DCC 20 H/C 4Rows
F.C 10 764.3427753 DCC 8 H/C 4Rows
F.C 11 1207.150557 DCC 20 H/C 4Rows
F.C 12 1365.065423 DCC 20 H/C 4Rows
F.C 13 1251.730027 DCC 20 H/C 4Rows
F.C 14 1297.44124 DCC 20 H/C 4Rows
F.C 15 1275.241218 DCC 20 H/C 4Rows
F.C 16 1279.681222 DCC 20 H/C 4Rows
F.C 17 1289.216816 DCC 20 H/C 4Rows
F.C 10 1070.235689 DCC 20 H/C 4Rows
F.C 19 1193.055289 DCC 20 H/C 4Rows
F.C 20 1690.750598 DCC 20 H/C 4Rows
F.C 21 1425.472979 DCC 20 H/C 4Rows
F.C 22 1425.472979 DCC 20 H/C 4Rows
F.C 23 1425.472979 DCC 20 H/C 4Rows
F.C 24 1425.472979 DCC 20 H/C 4Rows
F.C 25 1425.472979 DCC 20 H/C 4Rows
F.C 26 1425.472979 DCC 20 H/C 4Rows
F.C 27 1425.472979 DCC 20 H/C 4Rows
F.C 28 2557.171429 DCC 30 H/C 4Rows
F.C 29 3019.363244 DCC 30 H/C 4Rows
F.C 30 478.7361683 DCC 6 H/C 4Rows
F.C 31 564.7566148 DCC 6 H/C 4Rows
F.C 32 777.6401609 DCC 8 H/C 4Rows
F.C 33 1865.886646 DCC 20 H/C 4Rows
F.C 34 853.885741 DCC 10 H/C 4Rows
F.C 35 675.9522249 DCC 8 H/C 4Rows
F.C 36 844.4357264 DCC 10 H/C 4Rows
F.C 37 642.8456472 DCC 8 H/C 4Rows
F.C 38 2021.586108 DCC 24 H/C 4Rows
F.C 39 1671.458302 DCC 20 H/C 4Rows
F.C 32 919.9569715 DCC 10 H/C 4Rows
Pipe Sizing ( FCU 1)
Supply Pipe sizing
m = (Qs +Ql.) / (4180*6)
m = (1826.6 +1552.7) / (4180*6) = 0.135 L/s Pressure drop assumption 400 pa/m.
Preferred size at operating condition is 0.75 in
SHAFT ( 1 )
F.C.UHeat loss (W) m ( L/s)
Friction Size ( in )
F.C 28 A8368.925
1.69564826 400 2
F.C 124467.487
1.36195908 400 1.5
F.C 13349.292
1.18382962 400 1.5
F.C 134096.571
1.05028527 400 1.5
F.C 23349.292
0.88694512 400 1.25
F.C 144246.171
0.75340078 400 1.25
F.C 33742.552
0.5840957 400 1.25
F.C 154173.517
0.43487115 400 1
F.C 322545.004
0.26846299 400 1
F.C 164188.048
0.16698755 400 0.75
Duct Sizing ( FCU 1)
Qt = 3.35 kw V circulation air = Qt / 1.2 * (Tcir. – Ti) V circulation = 3.35 / (1.2* 10) = 0.465 m3/ s Pressure drop = 0.55 pa / m
velocity = 4.1 m / s A = 0.11 m2
D = 0.385 m High = 0.3 m Width = 0.425 m
F.C.U # Load (CFM) HIGHT A - B B - C C - D D - E E - F F - G G - H H - I
F.C 1 1023.394837 0.3 0.425 0.275 0.2
F.C 2 1023.394837 0.3 0.425 0.275 0.2
F.C 3 1143.55744 0.3 0.45 0.325 0.2
F.C 4 1156.677381 0.3 0.45 0.325 0.2
F.C 5 1131.36318 0.3 0.45 0.325 0.2
F.C 6 1131.36318 0.3 0.45 0.325 0.2
F.C 7 1131.36318 0.3 0.45 0.325 0.2
F.C 8 1069.815758 0.3 0.425 0.275 0.2
F.C 9 1690.750598 0.3 0.625 0.5 0.375 0.2
F.C 10 764.3427753 0.3 0.325 0.2
F.C 11 1207.150557 0.3 0.475 0.35 0.2
F.C 12 1365.065423 0.3 0.525 0.4 0.2
F.C 13 1251.730027 0.3 0.5 0.35 0.2
F.C 14 1297.44124 0.3 0.5 0.35 0.2
F.C 15 1275.241218 0.3 0.5 0.35 0.2
F.C 16 1279.681222 0.3 0.5 0.35 0.2
F.C 17 1289.216816 0.3 0.5 0.35 0.2
F.C 10 1070.235689 0.3 0.425 0.275 0.2
F.C 19 1193.055289 0.3 0.425 0.275 0.2
F.C 20 1690.750598 0.3 0.625 0.5 0.375 0.2
F.C 21 1425.472979 0.3 0.55 0.425 0.275 0.2
F.C 22 1425.472979 0.3 0.55 0.425 0.275 0.2
F.C 23 1425.472979 0.3 0.55 0.425 0.275 0.2
F.C 24 1425.472979 0.3 0.55 0.425 0.275 0.2
F.C 25 1425.472979 0.3 0.55 0.425 0.275 0.2
F.C 26 1425.472979 0.3 0.55 0.425 0.275 0.2
F.C 27 1425.472979 0.3 0.55 0.425 0.275 0.2
F.C 28 2557.171429 0.3 0.875 0.775 0.65 0.525 0.4 0.25 0.2
F.C 29 3019.363244 0.3 1.025 0.9 0.775 0.65 0.53 0.4 0.28 0.2
F.C 30 478.7361683 0.3 0.225 0.2
F.C 31 564.7566148 0.3 0.275 0.2
F.C 32 777.6401609 0.3 0.325 0.2
F.C 33 1865.886646 0.3 0.675 0.55 0.425 0.3 0.2
F.C 34 853.885741 0.3 0.35 0.2
F.C 35 675.9522249 0.3 0.3 0.2
F.C 36 844.4357264 0.3 0.35 0.2
F.C 37 642.8456472 0.3 0.3 0.2
F.C 38 2021.586108 0.3 0.725 0.6 0.475 0.35 0.2
F.C 39 1671.458302 0.3 0.625 0.5 0.375 0.2
F.C 32 919.9569715 0.3 0.375 0.2
Fresh Air Duct
For single room ( 1 ) V.vent. = ( L/S/ Area ) * Area V.vent. = 5 * 18.6 = 93 L/s Pressure drop = 0.55 pa / m
velocity = 3 m / s A = 0.0314 m2
D = 0.2 m High = 0.2 m Width = 0.175 m
SHAFT ( 1 )
SECTION V vent(L/S)PA/M HIGHT WIDTH
A - B 1173.5
0.55 0.3 0.875
B - C 936
0.55 0.3 0.7
C - D 843
0.55 0.3 0.65
D - E 724.5
0.55 0.3 0.575
E - F 609.5
0.55 0.3 0.5
F - G 516.5
0.55 0.3 0.45
G - H 396.5
0.55 0.3 0.35
H - I 290.5
0.55 0.3 0.275
I - J 173
0.55 0.3 0.2
STATIC PRESSURE PA
13.75
Fresh Air Fan Selection
Fan specification Flow rate = 1173.5 L/s Static Pressure = 13.75 pa
From Rosenberg RoVent catalog we select DHAD 355-4 series .
Exhaust Air Duct
V = ( A.C.H *Vin* 1000) / 3600 V = ( 10 * 3.5*3.1*1000 ) / 3600 V = 30 L/s/path. Pressure drop = 0.55 pa / m
velocity = 2 m / s D = 0.136 m High = 0.2 m Width = 0.75 m
SECTION V (L/S)
PA/M HIGHT WIDTH
A - B 210
0.55 0.2 0.325
B - C 180
0.55 0.2 0.3
C - D 150
0.55 0.2 0.25
D - E 120
0.55 0.2 0.225
E - F 90
0.55 0.2 0.175
F - G 60
0.55 0.2 0.125
G - H 30
0.55 0.2 0.75
STATIC PRESSURE PA
13.75
Exhaust Fan Selection
Fan specification Flow rate = 210( L/s ). Static Pressure = 13.75 pa
From Rosenberg RoVent catalog we select DHAD 355-4 series .
Air Handling Unit Selection
For Operation Theaters in the First floor Three O.T have Load of (440.12 CFM). The other have load of (635.86 CFM ).
For Operation Theater in the Second floor Operation Theater load of (530.5 CFM)
For Operation Theaters in the GF floor Operation Theater load of (217.57 CFM)
For Operation Theaters in the B1 floor Operation Theater load of (633.53 CFM)
From PETRA Catalogue the minimum Available AHU Load is 1200 CFM
So we select PAH H C 12 C6 H4 X4
Plumbing System Potable Water
No. of Fixture units is to be calculated to start sizing using special tables for potable design.
For internal network plastic pipes to be used
For external network steel pipes to be used
Sample Calculation
Space Name ( H.W.S ) F.U ( H.W.R ) F.U ( C.W.S ) F.U
SINGLE ROOM (1&2) 12 7.2 22
SINGLE ROOM ( 3 ) 6 3.6 11
SINGLE ROOM (4&5) 12 7.2 22
SINGLE ROOM ( 6 & 7) 12 7.2 22
SINGLE ROOM (9) + DOUBLE ROOM 16 12 7.2 22
SINGLE ROOM (10) + DOUBLE ROOM ( 7 ) 12 7.2 22
DOUBLE ROOM ( 1 & 2 ) 12 7.2 22
DOUBLE ROOM ( 3 & 4 ) 12 7.2 22
DOUBLE ROOM ( 5 & 6 ) + SUITE 18 10.8 33
DOUBLE ROOM ( 8 & 9 ) 12 7.2 22
DOUBLE ROOM ( 10 & 11 ) 12 7.2 22
DOUBLE ROOM ( 12 & 13 ) 12 7.2 22
DOUBLE ROOM ( 14 & 15 ) 12 7.2 22
WAITING AND LUNGE 0 0 1
MAIL CHANGE 16 9.6 26
FEMAIL CHANGE 16 9.6 26
Single Room (11) and Lounge(1) 6 3.6 11
Section ( H.W.S ( L/S ) SIZE (in) ( H.W.S ) ( H.W.R ) ( L/S ) SIZE (in) ( H.W.R )
A - B 1.01 1 0.88 1
B - C 0.68 0.75 0.47 0.5
C - D 1.01 1 0.88 1
D - E 1.01 1 0.88 1
Section ( C.W.S ) ( L/S ) SIZE (in) ( C.W.S )
A - B 1.288 1
B - C 0.965 1
C - D 1.288 1
D - E 1.288 1
Riser ( 1 ) MAIN LINE Size ( in )
ITEM TOTAL FIXTURE Flow Rate ( L/s ) SIZE ( in)
Cold Water System 77 2.357 1.25
Hot Water System 42 1.724 1.25
Hot Water System Return 25.2 1.38 1
FLOOR CWS ( F.U ) HWS ( F.U )
B4 21.5 16.5
B3 93 43
B2 108 48
B1 36.25 12.25
GF 172 21
1 133.5 43.5
2 197 57
3 350 194
4 350 194
5 350 194
SUM ( F.U ) 1811.25 823.25
FLOW RATE ( L/s ) 19.438 11.5665
SIZE ( IN ) 4 3.5
TANK SIZE 2.33256 1.38798
Pump Specification
Residual Pressure ( PSI ) 5 5
Friction ( PSI ) 17.64705882 17.64705882
Fitting ( PSI ) 8.823529412 8.823529412
Head ( PSI ) 5.049264706 5.049264706
Total Head ( PSI ) 26.42132353 26.42132353
Flow Rate (L/S ) 19.438 11.5665
Pump Selection
Cold Water Pump have the following specification :
Flow rate 19.438 L/s Pump Head 26.42 PSI
From WILO Catalog we chose NL 50/160-5.5-2-12-50Hz series.
Tank size 2.33256 Cubic meter for two operating hour per day .
Hot Water Pump have the following specification :
Flow rate 11.5665 ( L/s ) Pump Head 26.42 ( PSI ).
From WILO Catalog we chose BAC 70/135-3/2-Rseries.
Tank size 1.38798 Cubic meter for two
operating hour per day .
Pressure Tank Selection
From Wessels Company Catalogue depending on Pump flow rate (11.56 L/s) (183.2 GPM) we select TXA 800 .
Expansion Tank Selection
From Wessels Company Catalogue depending on Pump flow rate (19.44 L/s) (308 GPM) we select FXA-1200-WG.
Drainage System
Number of fixtures is to be determined to start sizing for the stacks and horizontal branches using special tables
ITEM SIZE ( IN ) FIXTURE UNIT
BATHTUB 1.5 2
FLOOR DRAIN ( 4 ) 4 6
LAVATORY 1.25 1
Water Closet ( Tank Type ) 4 4
Space Name Gray Water F.UGray Water
STACK Size Black Water
(W.C) F.UBlack Water (W.C)
STACK Size
SINGLE ROOM (1&2) 24 4 8 4
SINGLE ROOM ( 3 ) 15 3 4 4
SINGLE ROOM (4&5) 18 3 8 4
SINGLE ROOM ( 6 & 7) 18 3 8 4
SINGLE ROOM (9) + DOUBLE ROOM 16 24 4 8 4
SINGLE ROOM (10) + DOUBLE ROOM ( 7 ) 18 3 8 4
DOUBLE ROOM ( 1 & 2 ) 18 3 8 4
DOUBLE ROOM ( 3 & 4 ) 18 3 8 4
DOUBLE ROOM ( 5 & 6 ) + SUITE 27 4 12 4
DOUBLE ROOM ( 8 & 9 ) 24 4 8 4
DOUBLE ROOM ( 10 & 11 ) 18 3 8 4
DOUBLE ROOM ( 12 & 13 ) 24 4 8 4
DOUBLE ROOM ( 14 & 15 ) 18 3 8 4
WAITING AND LUNGE 24 4 0 0
MAIL & Female CHANGE & Single Room (11) & Lounge(1) 81 4 20 4
TOTAL FIXTURE 369 124
FLOOR SHAFT 1 ( F.U ) SHAFT 2 ( F.U ) SHAFT 3 ( F.U ) SHAFT 4 ( FU )
B4 0 0 0 0
B3 12 112 66 36
B2 48 0 123 83
B1 52 18 36 0
GF 30 18 88 52
1 90 97 0 0
2 70 88 0 0
3 129 89 0 110
4 129 89 191 110
5 129 89 191 110
SUM 689 600 695 501
STA CK SIZE ( IN ) 5 5 5 5
BUILDING DRAIN BETWEEN STAK FU SIZE
SHAFT 4 & 3 501 6
SHAFT 3 & 2 1196 8
SHAFT 2 & 1 1796 10
DRAIN 2485 10
Fire Fighting System
Landing Valve and Cabinet
• landing valve 2 ½ “ (NFPA code)• cabinet 1 ½ “ (NFPA code)
Sprinklers system with heat and smoke detectors .
Landing Valve and Cabinet
Pipe Size ( in ) Flow Rate ( GPM ) Pressure Drop ( PSI/ft ) Path ( ft ) Pressure Drop ( PSI )
4 1000 0.2 32.8 6.56
4 750 0.1 82.984 8.2984
4 500 0.05 318.488 15.9244
2.5 250 0.15 29.52 4.428
Pump Selection Residual Pressure ( PSI ) 100
Flow Rate ( G.p.m ) 1000 head ( PSI ) 50.49264706
Head ( PSI ) 213.8720871 Friction ( PSI ) 35.2108
Flow Rate ( L/S ) 54.66666667 Fitting ( PSI ) 28.16864
head ( Kpa ) 1473.826015 Total ( PSI ) 213.8720871
Pump Selection
Pump flow rate 1000 GPM. Pump head 213.87 PSI
For electric and diesel pump we select from WILO Company ( NPG 100-315A-110/2 ) series.
For Jockey Pump have the following specification Jockey flow rate 100GPM. Jockey head 213.87 PSI. From WILO Company we select TWI 6.18-22-B
series .
Pressure Tank Selection
From Wessels Company Catalogue depending on Pump flow rate (1000GPM) we select FXA-4000.
Tank Volume
Tank Volume = ( 1000*3.78*60)/1000 = 226.8 (Cubic meter ).
tank sets beside the building .
Sprinklers
Combustible Ceiling Covered Area Maximum Distance( m )
Light Hazardous 21 4.6
Residual Pressure( PSI ) Flow Rate ( gpm ) Duration Time ( s )
15 15 60
NO. Sprinklers Pipe Size ( in )
2 1
3 1.25
5 1.5
10 2
20 2.5
40 3
65 3.5
100 4
160 5
275 6
NO. Sprinklers Pipe Size ( in ) Q ( gpm) Pressure Drop ( PSI/ft ) Path (ft) Pressure Drop ( PSI)
1 1 15 0.107 20.664 309.96
3 1.25 45 0.022 14.76 664.2
4 1.5 60 0.173 2.624 157.44
10 2 150 0.279 9.184 1377.6
11 2.5 165 0.142 7.216 1190.64
14 2.5 210 0.2 7.544 1584.24
17 2.5 255 0.316 5.248 1338.24
20 2.5 300 0.427 4.264 1279.2
21 3 315 0.161 4.264 1343.16
36 3 540 0.33 37.72 20368.8
39 3 585 0.35 3.28 1918.8
45 3.5 675 0.37 5.576 3763.8
51 3.5 765 0.4 21.484 16435.26
78 4 1170 0.25 114.8 134316
Pump Selection Residual Pressure ( PSI ) 15
Flow Rate ( gpm ) 1170 head ( PSI ) 50.49264706
head ( PSI ) 200.3978663 Friction ( PSI ) 74.947344
Flow Rate (L/S ) 63.96 Fitting ( PSI ) 59.9578752
head ( Kpa ) 1380.973051 Total ( PSI ) 200.3978663
Medical Gases
Medical gases systems in hospitals, are essential for supplying piped oxygen, nitrous oxide, nitrogen, carbon dioxide and medical air to various parts of the hospital.
These systems are usually highly monitored by various computerized alarm systems.
Pipe Sizing
Oxygen. Medical Air. Medical Vaccum.
For shaft 2
Medical Gas Type Medical Air Medical Vaccum Oxygen
Typical outlet Flow 1 SCFM 1 SCFM 1 SCFM
Allowable Pressure Loss 60 Psig 25 mmHg = 0.5 Psig 60 Psig
Number Of Outlet 12 12 12
Longest Path ( m ) 55.4 55.4 55.4
Equivelent Length ( ft/100 ) 2.73568 2.73568 2.73568
Pressure drop ( Psi / 100 ft ) 1.8344 0.18344 1.8344
Oxygen Medical Air Pipe sizing.
section Number Of Outlet Diversity factor ( % ) Effective SCFM Effective SCFM Size ( in )
A - B 1 100 1 1 0.5
B - C 2 100 1 1 0.5
C - D 3 100 1 1 0.5
D - E 4 75 3 3 0.5
E - F 5 75 3.75 4 0.5
F - G 6 75 4.5 5 0.5
G - H 7 75 5.25 6 0.5
H - I 8 75 6 6 0.5
I - J 9 75 6.75 7 0.5
J - K 10 75 7.5 8 0.5
K - L 11 75 8.25 9 0.5
L - M 12 75 9 9 0.5
M - N 13 33 4.29 5 0.5
N -O 14 33 4.62 5 0.5
O - P 15 33 4.95 5 0.5
P - Q 16 33 5.28 6 0.5
Q - S 17 33 5.61 6 0.5
S - T 18 33 5.94 6 0.5
T - U 19 33 6.27 7 0.5
U - V 38 33 12.54 13 0.75
V - W 57 33 18.81 19 0.75
Medical Vaccum Pipe sizing
section Number Of Outlet Diversity factor ( % ) Effective SCFM Effective SCFM Size ( in )
A - B 1 100 1 1 0.75
B - C 2 100 1 1 0.75
C - D 3 100 1 1 0.75
D - E 4 75 3 3 0.75
E - F 5 75 3.75 4 0.75
F - G 6 75 4.5 5 0.75
G - H 7 75 5.25 6 1
H - I 8 75 6 6 1
I - J 9 75 6.75 7 1
J - K 10 75 7.5 8 1
K - L 11 75 8.25 9 1
L - M 12 75 9 9 1
M - N 13 33 4.29 5 0.75
N -O 14 33 4.62 5 0.75
O - P 15 33 4.95 5 0.75
P - Q 16 33 5.28 6 1
Q - S 17 33 5.61 6 1
S - T 18 33 5.94 6 1
T - U 19 33 6.27 7 1
U - V 38 33 12.54 13 1
V - W 57 33 18.81 19 1.25
Elevator
Selection Criteria
Type Speed Size High Quantity Applications
Elevator Selection
We use the stander size , speed and quantity that used in the hospital From MRL Passenger Lift Range Company with Speed of 1m/s .
load Entrance layout
Internal Shaft Diminution Door Type Doors Opining (at a height 2000mm)
PIT Headroom
Kg/person Width(mm)
Depth(mm)
Width(mm)
Depth(mm) Height(mm)
1600/21 Through()
2400 2850 2PSO automatic
1100 1300 3600
load Entrance layout
Internal Shaft Diminution Door Type Doors Opining (at a height 2000mm)
PIT Headroom
Kg/person Width(mm)
Depth(mm)
Width(mm)
Depth(mm) Height(mm)
800/ 10 Single 1750 2050 2PSO automatic
900 1200 3450
Sizing For Patients (bed)Elevator
Sizing For Passenger Elevator
Thank YOU