PROPOSAL

Modern Government Maternity

Hospital

DEPARTMENT OF BTS/FSP
B,TECH V-SEMESTER
16011BB001,002,007,018,031 & 048.

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CONTENTS
Mechanical
Page 3-7

Electrical
Page 8-11

Plumbing
Page 11-12

ACKNOWLEDGEMENT:

We would like to extend our sincere and heartfelt gratitude to our Professors Mr. Chennaiah
and Mr.Chandrakanth, who have helped us in this endeavor and for their guidance and
constant supervision, as well as, for providing us the necessary information.

Finally, we would also like to thank our laptops, the internet providers and all our friends who
helped us in reviewing and finalizing this report within the limited time frame.

MECHANICAL PROPOSAL

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HVAC DESIGN PROPOSAL FOR M.G.M. HOSPITAL

REQUIREMENTS FOR HOSPITAL–

Design of HVAC System for the Hospital is referred from “NATIONAL
ACCREDATION BOARD FOR HOSPITAL AND HEALTH CARE” (NABH).

OPERATION THEATRES:
1. Air Changes Per Hour:
▪ Minimum total air changes should be 20 based on biological load and the
location.
▪ The fresh air component of the air change is required to be minimum 4 air
changes out of total minimum 20 air changes.
▪ If Healthcare Organization (HCO) chooses to have 100% fresh air system
then appropriate energy saving devices like heat recovery wheel, run around
pipes etc. should be installed.

2. Air Velocity: The air face velocity of 25-35 FPM (feet per minute) from non-
aspirating unidirectional laminar flow diffuser/ceiling array is recommended.

3. Positive Pressure: The minimum positive pressure recommended is 2.5

Pascal (0.01 inches of water). There is a requirement to maintain positive
pressure differential between OT and adjoining areas to prevent outside air
entry into OT. Positive pressure will always be maintained in OT (operational &
non-operational hours)

4. Air handling in the OT including air Quality: Air is supplied through Terminal
HEPA (High-Efficiency Particulate Air) filters in the ceiling. The HEPA can be at
AHU level if it not feasible at terminal level inside OT. The minimum size of the
filtration area should extend one foot on all sides of the OT table.

5. Air Filtration: The AHU (i.e. air handling unit) must be an air purification unit
and air filtration unit. There must be two sets of washable flange type filters of
efficiency 90% down to 10 microns and 99% down to 5 microns with aluminum /
SS 304 frame within the AHU. The necessary service panels to be provided for
servicing the filters, motors & blowers.

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HEPA filters of efficiency 99.97% down to 0.3 microns or higher efficiency are to
be provided. Air quality at the supply i.e. at grille level should be Class 100/ISO
Class 5 (at rest condition). Note: class 100 means a cubic foot of air should not
have more than 0.5 microns or larger.

6. Temperature and Humidity:

The temperature should always be maintained at 210C ± 30C inside the OT with
corresponding relative humidity between 20 to 60%. Appropriate devices to
monitor and display these conditions inside the OT may be installed.

Design considerations for Operation Theatres

A. The AHU of each OT should be dedicated one and should not be linked to air
conditioning of any other area in the OT and surroundings.
▪ One AHU for multiple OTs is permitted provided there is a back-
up/contingency plan to accommodate surgeries in other OTs in the
eventuality of failure of infection control in these OTs. Redundancy in terms
of multiple fans for return and input air with UPS and DG set supply is
provided to such type of common AHU.

Direct drive fans will be required in such common AHU. The specific
evidence of validation for the above will have to be provided either by the
vendor/third party.

B. Outdoor Air intakes: The location of outdoor air intake for an AHU must not be
located near potential contaminated sources like DG exhaust hoods, lab
exhaust vents, and vehicle parking area.

C. Window & split A/c should not be used in any type of OT because they are
pure re-circulating units and have pockets for microbial growth which cannot be
sealed.

Maintenance of the system

Validation of system should be done 1. Temperature and Humidity
every 6 months and as per ISO check
14664 standards. This should 2. Air particulate count
include: 3. Air Change Rate Calculation

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4. Air velocity at outlet of terminal 6. Validation of HEPA Filters by

filtration unit /filters appropriate tests.
5. Pressure Differential levels of
the OT with respect to ambient
/ adjoining areas

Preventive Maintenance of the system: It is recommended that periodic

preventive maintenance be carried out in terms of cleaning of pre-filters, micro
vie filters at the interval of 30 days. Preventive maintenance of all the parts of
AHU is carried out as per manufacturer recommendations.

PROPOSED AHU(CAPACITY) IN HOSPITAL (FLOOR WISE):

A.H.U. – BLUESTAR COMPANY

GROUND FLOOR:
A.H.U 1 16600 CFM 41.5 TR
A.H.U 2 5350 CFM 13.3 TR
A.H.U 3 16800 CFM 42 TR
A.H.U 4 12200 CFM 30.5 TR

TOTAL TR 127.3 TR.

FIRST FLOOR:
A.H.U 1 15500 CFM 38.5 TR
A.H.U 2 25450 CFM 63.625 TR
A.H.U 3 15500 CFM 38.75 TR
A.H.U 4 21325 CFM 53.3 TR

TOTAL TR 194.1 TR.

SECOND FLOOR:
A.H.U 1 14050 CFM 35.1 TR
A.H.U 2 5900 CFM 14.75 TR
A.H.U 3 7925 CFM 19.8 TR
A.H.U 4 19875 CFM 49.6 TR

TOTAL TR 119.25 TR.

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THIRD FLOOR:
A.H.U 1 13000 CFM 32.5 TR
A.H.U 2 9625 CFM 24 TR
A.H.U 3 17700 CFM 44.25 TR
A.H.U 4 6375 CFM 15.9 TR

TOTAL TR 116.65 TR.

FOURTH FLOOR:
A.H.U 1 11125 CFM 27.8 TR
A.H.U 2 13175 CFM 32.9 TR
A.H.U 3 14900 CFM 37.25 TR
A.H.U 4 19400 CFM 48.5 TR

TOTAL TR 146.45 TR.

TOTAL BUILING TONNAGE FOR REFRIGERATION ≈ 704 TR.

TOTAL ELECTRICAL LOAD FOR A.H.U.= 137.5KW

TYPES OF AHU

GROUND FLOOR:
100 % FRESH AIR AHU – 1
50% FRESH AIR AHU – 3
THIRD FLOOR:
FIRSTFLOOR: 100 % FRESH AIR AHU – 1
100 % FRESH AIR AHU – 2 50% FRESH AIR AHU - 3
50% FRESH AIR AHU - 2
FOURTH FLOOR:
SECONDFLOOR: 100 % FRESH AIR AHU – 0
100 % FRESH AIR AHU – 2 50% FRESH AIR AHU - 4
50% FRESH AIR AHU - 2

COOLING TOWERS – AIR TECH COMPANY

1. NOMINAL CAPACITY TR – 400 ▪ DIAMETER – 5800MM
HEAT REJECTION–1500 KCAL/HR ▪ FAN DIA – 3000MM
X 1000 MOTOR HP – 15.0
DIMENSIONS: PUMPING HEAD – 4000MM
▪ HEIGHT – 3700MM PUMP RATING - 11.4KW

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2. NOMINAL CAPACITY TR – 200

HEAT REJECTION – 750 KCAL/HR X 1000

DIMENSIONS:
HEIGHT 3200MM
DIAMETER 3600MM
FAN DIA 1800MM

▪ MOTOR HP – 10.0
▪ PUMPING HEAD – 3400MM
▪ PUMP RATING - 4.57KW

CHILLERS – VOLTAS COMPANY

TYPE AIR COOLED SCROLL CHILLERS

REFRIGERANT R407C
NO. OF FANS 06
EVAP.WATER NOZZLE SIZE 5’’
PUMP RATING 21KW.

▪ AIR COOLED CHILLER SYSTEM IS PROPOSED

▪ THE NORMAL COMFORT TEMPERATURE RANGE FOR PATIENT
ROOM IS CONSIDERED 21-24°C.
▪ DUCTINGTYPE: CASSETTE
▪ HEAD LOSS- 0.1WC/100”

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PROPOSAL FOR ELECTRICAL EQUIPMENT

1.Ceiling fan:

40 watts, 5 star rated ceiling fan with same shape and size is proposed.

• Existing ceiling fan wattage- 75 watts

• Proposed ceiling fan wattage- 40 watts
• Wattage Saved- 35 watts (per unit)
• No. of ceiling fans in Hospital- 653
• Total Wattage saved – 22855 watts.

2. Tube light:

22 watts LED tube light is proposed. Its lumen rate is 2500 where the existing
light lumen rate is 2400.

• Existing tube light wattage- 40 watts

• Proposed tube light wattage- 22 watts
• Wattage saved - 18 watts (per unit)
• No. of tube lights in hospital- 988.
• Total wattage saved - 17784 watts.

3. Pedestal fans:

55 watts, 5 star rated pedestal fan with same shape and size is proposed.

• Existing pedestal fan wattage- 155 watts

• Proposed pedestal fan wattage- 55 watts
• Wattage saved - 100 watts (per unit)
• No.of Pedestal fans in hospital- 6.
• Total wattage saved - 600 watts.

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4. Wall Fans:

50 watts, 5 star rated wall fan with same shape and size is proposed.

• Existing wall fan wattage- 55 watts

• Proposed wall fan wattage- 50 watts
• Wattage saved - 5 watts (per unit)
• No. of wall fans in hospital - 7
• Total wattage saved- 35 watts.

5. Bulbs:

5.5 watts led bulb is proposed. It’s lumen rate is 450 where the existing bulb
lumen rate is 400.

• Existing bulb wattage- 15 watts

• Proposed bulb wattage- 5.5 watts
• Wattage saved - 9.5 watts (per unit)
• No. of tube lights in hospital- 309
• Total wattage saved - 29395.5 watts.

TOTAL SAVED WATTAGE:

Equipment Consumption (Watts)

Ceiling fans 22855 watts
Tube lights 17784 watts
Pedestal fans 600 watts
Wall fans 35 watts
Bulbs 29395.5 watts
Total Savings (Watts) 70669.5 watts.

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Extra added equipment for proposal:

• Ceiling fans- 293(40 watts) = 11720 watts

• Tube lights- 356(22 watts) = 7832 watts.
• Total wattage required = 19552 watts.
• Saved wattage by proposing energy efficient equipment is 70669.5 watts.
• Wattage remained after usage for extra equipment is
70669.5-19552 =51117.5 watts.
• Final saved wattage is 51117.5 watts.

HVAC system proposed:

1. Central air conditioning system is proposed.
2. 100% fresh air is provided for Operation Theatre and 50% fresh air system
is provided in proposal.
3. Approximately 20kW power consumption is calculated per floor.
4. The total power consumption for HVAC is about 237 kW.

Total calculation:
Power consumption for Hospital is 481 kW.
Power consumption for HVAC is 237 kW.
Total consumption-408kW.
Transformers used:
Transformer – 1 400 kVA
Transformer – 2 250 kVA

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PLUMBING PROPOSAL

a) There are no borewells in the site, therefore waters are supplied by the
municipal.
b) There are two sumps, of each capacity 240 kl.
c) There are four OHTs of each capacity 20 kl.
d) From SUMP-1, water is sent to OHT 1&4 and from SUMP-2, water is sent to
OHT 2&3.
e) Daily water consumption in the Hospital is 220 kl.
f) The waste water is sent to STP for purification out of which 15% will be
wasted and 85% i.e,190 kl will be purified.
g) This water is stored in sump of capacity 200 kl.
h) From this sump water is sent to 4 OHT'S of capacities each 20 kl.
i) This water is used for water closets and for gardening etc.
j) Water used in operation theatres is diverted to ETP, after treatment, water is
sent to STP for further purification.
k) Waste water is discharged into River Musi.
l) If STP stops functioning due to any problem municipal water will be supplied
to water closets.
m) Pure water tanks and treated water tanks are connected by a pipe and
controlled by a valve.
n) Pumps: 5 HP (4), 7.5 HP (4), 9.9 HP (1), 12.5 HP (2).

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RAIN WATER HARVESTING PROPOSAL:

Introduction:
1. Total site area is 3.94 acres where built up area is 1.39 acres.
2. The rain water from roof is connected to sump and water from surface area is
collected through trench and channelled to recharge pits.
3. Huge amount of rain water can be collected from roof area and can be used
for domestic purposes.
4. For surface area we proposed a harvesting system which consists of roof
drains, trenches, collection pits and recharge pit.
Process (roof water):
1. The rain water from roof top is collected through 220mm PVC roof drain
pipes.
2. These pipes are connected to sump through horizontal pipes laid on the
ground.
3. For first five minutes, water is diverted out with help of a valve for purity
purpose.
Process (runoff water):
1. Trench must be placed around the area with required slope such that the
runoff water is collected.
2. With trench for every 30 metre, a collection pit must be placed and at a
corner, where slope is identical, main recharge pit must be placed.
Runoff calculations:
• Total surface area: 5625 square metres (m2)
• Impervious area: 5344 square metres (m2)
• Peak day rainfall in Hyderabad: 0.014 m
• Total volume of rainwater harvested:73 cubic metres (m3) or 73000(litres)
(85% is wasted).
• Storage/harvesting capacity: 160 m3
• Therefore, 85 per cent of the total rooftop and surface runoff is being
harvested.

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