summary presentation updaterev20
TRANSCRIPT
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KINGDOM OF SAUDI ARABIAROYAL COMMISSION FOR JUBAIL & YANBU
ROYAL COMMISSION IN JUBAIL
CONTRACT NO : 641-C46REHABILITATION OF RC
HOSPITALSITE INFRASTRUCTURE
GMTA PRESENTATION
AUGUST 2014
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AGENDA1. INTRODUCTION2. POTENTIAL REHABILITATION3. CONDITION SURVEY
1. MECHANICAL2. ELECTRICAL 3. STRUCTURAL
4. PIPING DISTRIBUTION OPTIONS1. OPTION 1 – TUNNEL OPTIMIZATION2. OPTION 2A – OVERHEAD BRIDGE3. OPTION 2B – TUNNEL & OVERHEAD4. OPTION 3 – COMBINE ESSENTIAL & NONESSENTIAL CHW
5. SUMMARY
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PIPE RISER FROM TUNNE
L TO EQUIPMENT
ROOM-1
POWER
PLANT
AREA OXYGEN STORAGE TANKS
WATER
RESERVIO
R AND
PUMP ROO
M
FUEL TANKS
TRANSFOR
MER ARE
A
CHILLER COMPOUND
TRANSFORMER AREA
UNDERGROUND UTILITY TUNNEL
HIG
HW
AY 4
HIG
HW
AY 4
AL LULU ROAD
MAIN ENTRANCE
AL LULU ROAD
EMERGENCY ENTRANCE
INTRODUCTIONThe Scope of the project is to rehabilitate and update the existing RC Hospital site infrastructure to bring the existing facilities to current code requirements.
OVERALL SITE LAYOUT
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PIPE RISER FROM TUNNE
L TO EQUIPMENT
ROOM-1
POWER
PLANT
AREA OXYGEN STORAGE TANKS
WATER
RESERVIO
R AND
PUMP ROO
M
FUEL TANKS
TRANSFOR
MER ARE
A
CHILLER COMPOUND
CHILLED WATER
PUMPS & SWITCH
GEAR
ROOM
UNDERGROUND
UTILITY
TUNNEL
HIG
HW
AY 4
HIG
HW
AY 4
AL LULU ROAD
MAIN ENTRANCE
AL LULU ROAD
EMERGENCY ENTRANCE
OVERALL SITE LAYOUTTHE SCOPE OF WORK INCLUDE:
STUDY AND INSPECTION OF EXISTING SITE UTILITIES
RENEWAL / REHABILITATION OF EXISTING UTILITY
SYSTEMS
BRING EXISTING FACILITIES TO CURRENT CODE
REQUIREMENTS
REPLACEMENT / REHABILITATION OF CONTROL
SYSTEMS ASSOCIATED WITH MECHANICAL SYSTEMS
CHANGING MEDIUM VOLTAGE TO LOW VOLTAGE FOR
THE CHILLERS
POTENTIAL REHABILITATION INCLUDES:
CHILLED WATER SYSTEM
STEAM SUPPLY SYSTEM
HOT AND COLD WATER SYSTEMS
DISTRIBUTION PIPING SYSTEMS
EMERGENCY POWER
MEDICAL GAS SYSTEMS
ELECTRICAL SUPPLY
TELECOMMUNICATION SYSTEM
FIRE HYDRANTS
ME- 4
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POTENTIAL REHABILITATION
CHILLED WATER SYSTEM
STEAM SUPPLY SYSTEM
HOT AND COLD WATER SYSTEMS
DISTRIBUTION PIPING SYSTEMS
EMERGENCY POWER
MEDICAL GAS SYSTEMS
ELECTRICAL SUPPLY
THE SCOPE OF REHABILITATION INCLUDES:
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CONDITION SURVEY
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CONDITION SURVEY-CHILLER COMPOUND
CHILLER COMPOUND LAYOUT
KEY PLAN
MAIN PIPES GOES THRU TUNNEL THEN UNDER RAMP
MAIN PIPE HEADER WITH SUPPORTS
NE.CH-7
PROPOSED REPLACE CHILLERS: OPTION 1 – 8 CHILLERS FOR N+2 VERSUS OPTION 2 – 11 CHILLERS FOR 100% REDUNDANCY
PIPING HEADERS REPLACED BACK TO PUMP HOUSE MOVE NEW CHILLERS TO MEET CHILLER MANUFACTURER CLEARANCE RECOMMENDATION
ADD SUPERVISORY CONTROLS AND METERING
OPTION-1
OPTI
ON-2
EXISTING CONDITION FOURTEEN (14) TRANE AIR-COOLED CHILLERS
ELEVEN (11) TRANE AIR-COOLED CHILLERS INSTALLED IN 1980s
286 TON CENTRIFUGAL CHILLERS (OBSOLETE)
4160V MACHINES
FIVE (5) ARE IN WORKING CONDITION, REMAINING CHILLERS ARE OUT OF
SERVICE
THREE (3) TRANE AIR-COOLED CHILLERS INSTALLED IN 2008
400 TON SCREW CHILLERS
480V MACHINES
THE CHILLED WATER PIPING FROM CHILLER COMPOUND TO CHILLED WATER PUMP ROOM DOES NOT
SHOW VISUAL SIGNS OF LEAKAGE EXCEPT AT SPECIFIC TIE IN POINTS TO THE CHILLERS. ME- 7
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CONDITION SURVEY-CHILLER COMPOUND
CHILLER COMPOUND LAYOUT
KEY PLAN
MAIN PIPES GOES THRU TUNNEL THEN UNDER RAMP
THREE SCREW TYPE CHILLERS-2010400 TON480V MACHINES
EXISTING CONDITION:ELEVEN CENTRIFUGAL CHILLERS(OBSELETE)-1986
300 TON4160V MACHINESFIVE (5) ARE IN WORKING CONDITION, REMAINING
CHILLERS ARE OUT OF SERVICE
MAIN PIPE HEADER WITH SUPPORTS
NE.CH-7
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CONDITION SURVEY-CHILLER COMPOUND
CHILLER COMPOUND LAYOUT
KEY PLAN
MAIN PIPES GOES THRU TUNNEL THEN UNDER RAMP
MAIN PIPE HEADER WITH SUPPORTS
NE.CH-7
RECOMMENDATIONS:
REPLACE CHILLERS:OPTION 1 – 8 CHILLERS FOR N+2 VERSUSOPTION 2 – 11 CHILLERS FOR 100% REDUNDANCY
PIPING HEADERS REPLACED BACK TO PUMP HOUSE
ADD SUPERVISORY CONTROLS AND METERING
OPTION-1
OPTION-2
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CONDITION SURVEY-CHILLED WATER PUMP ROOM
CHILLED WATER PUMP ROOM LAYOUT
KEY PLAN
NE.CHWP-1&2
UTILITY TUNNEL ACCESS
PROPOSED REPLACE 3 CHILLED WATER PUMPS
REPLACE PIPING WHEN PUMPS ARE REPLACED
EXPAND OPD PUMP ROOM TO PROVIDE ACCESS TO PUMPS
ADD SUPERVISORY CONTROLS AND METERING
NEW OPD PUMP ROOM WITH 2 NE.CHW.PUMPS
EXISTING CONDITION SIX (6) CHILLED WATER PUMPS SERVING ESSENTIAL AND NON-ESSENTIAL
TWO (2) HORIZONTAL SPLIT CASE PUMPS
SERVING OPD CHILLED WATER CIRCUIT
TWO (2) HORIZONTAL SPLIT CASE PUMPS
SERVING NON-ESSENTIAL CHILLED WATER CIRCUIT
ONE PUMP IS NOT IN SERVICE
TWO (2) HORIZONTAL SPLIT CASE PUMPS
SERVING ESSENTIAL CHILLED WATER CIRCUIT
THE CHILLED WATER PIPING HEADERS SHOW MINOR SIGNS OF LEAKAGE
ME- 10
EXPANSION
OF OPD PUMP ROOM
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CONDITION SURVEY-CHILLED WATER PUMP ROOM
CHILLED WATER PUMP ROOM LAYOUT
KEY PLAN
NE.CHWP-1&2
UTILITY TUNNEL ACCESS
NEW OPD PUMP ROOM WITH 2 NE.CHW.PUMPS
EXISTING CONDITION:
TWO (2) HORIZONTAL SPLIT CASE PUMPS
SERVING OPD CHILLED WATER CIRCUIT
TWO (2) HORIZONTAL SPLIT CASE PUMPS
SERVING NON-ESSENTIAL CHILLED WATER CIRCUIT
ONE PUMP IS NOT IN SERVICE
TWO (2) HORIZONTAL SPLIT CASE PUMPS
SERVING ESSENTIAL CHILLED WATER CIRCUIT
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CONDITION SURVEY-CHILLED WATER PUMP ROOM
CHILLED WATER PUMP ROOM LAYOUT
KEY PLAN
NE.CHWP-1&2
UTILITY TUNNEL ACCESSRECOMMENDATIONS:REPLACE 3 CHILLED WATER PUMPS
REPLACE PIPING WHEN PUMPS ARE REPLACED
EXPAND OPD PUMP ROOM TO PROVIDE ACCESS TO PUMPS
ADD SUPERVISORY CONTROLS AND METERINGNEW OPD PUMP ROOM WITH 2 NE.CHW.PUMPS
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S.NO. ROOM NAME CODE REQUIREMENTCOMPLIANCE WITH
CODERECOMMENDATION
1 Chiller Compound
Mechanical utilities shall have proper access, clearance and
location and must be as per RC engineering requirements. Refer to RC Engineering
Manual, Chapter 6 section 6.16(C, D, E).
YesInstall new chillers per manufacturer required
clearance
2Chilled Water Pump
Room (Old)Yes
Piping replacement and relocation will improve tunnel
access.
3Chilled Water Pump
Room (New)No
The new chilled water pump room is recommended for
expansion so as to gain space for both the existing pumps.
CODE COMPLIANCE SUMMARY
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CONDITION SURVEY-POWER PLANT
KEY PLAN
POWER PLANT LAYOUT
CALORIFIERS
STEAM HEADER
BOILER PIPES AND FLUE STACK
PROPOSED REPLACE BOILER 1, BLOW DOWN TANK , 2 CALORIFIERS
RENOVATE ONE BOILER
REPLACE PIPING IN PLANT
ADD SUPERVISORY CONTROLS AND METERING
EXISTING CONDITIONSTEAM PRODUCED WITH 2 FIRE-TUBE BOILERS
COCHRAN 1254 kW FIRE-TUBE BOILERS INSTALLED IN 2001 AND 2010 REPORTED TUBE LEAKS, ISSUES WITH CHEMICAL TREATMENT MANUAL BLOWDOWN VALVE
CONDENSATE RETURN TANK AND DEAREATOR REPLACED IN 2010 BLOW DOWN TANK INSTALLED IN 1980s FOUR (4) FUEL OIL PUMPS INSTALLED IN 1980s WATER TREATMENT REPLACED IN 2010
HOT WATER PRODUCED WITH 6 CALORIFIERS
FOUR (4) SERVE DOMESTIC HW (N+2) TWO (2) INSTALLED IN 2010 TWO CURRENTLY NOT IN SERVICE
TWO (2) SERVE LAUNDRY, INSTALLED IN 2010
STEAM PIPES AND VALVES SHOW VISIBLE SIGNS OF LEAKAGE AND TEMPORARY REPAIRS ME- 14
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CONDITION SURVEY-POWER PLANT
KEY PLAN
POWER PLANT LAYOUT
2.CALORIFIERS
1.STEAM HEADER
BOILER PIPES AND FLUE STACK
TWO FIRE TUBE STEAM BOILERS BOILER-1 INSTALLED IN 2012 BOILER-2 INSTALLED IN 2001 REPORTED TUBE LEAKS, ISSUES WITH CHEMICAL TREATMENT SYSTEMSIX CALORIFIERS, FOUR NEW AND TWO OLD(NOT IN SERVICE)
NEW CONDENSATE RECEIVER TANK AND DEAREATORSTEAM PIPING AND VALVES SHOW VISIBLE SIGNS OF LEAKAGE
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CONDITION SURVEY-POWER PLANT
KEY PLAN
POWER PLANT LAYOUT
2.CALORIFIERS
1.STEAM HEADER
BOILER PIPES AND FLUE STACK
RECOMMENDATIONS:
REPLACE BOILER-2, BLOW DOWN TANK, 2 CALORIFIERS
RENOVATE BOILER-1
REPLACE PIPING IN PLANT
ADD SUPERVISORY CONTROLS AND METERING
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S.NO. ROOM NAME CODE REQUIREMENTCOMPLIANCE WITH
CODE RECOMMENDATION
4 Power Plant
Mechanical utilities shall have proper access, clearance and
location and must be as per RC engineering requirements. Refer to RC Engineering
Manual, Chapter 6 section 6.16(C, D, E).
Yes Piping replacements will result in improved tunnel access.
5 Utility Tunnel NoThe work inside the tunnel must be as per approved mechanical
option.
6Water Reservoir and
Pump roomYes
Water reservoir and pump room are currently being upgraded.
Proper ventilation must be provided as per code
requirements.
CODE COMPLAINCE SUMMARY
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CONDITION SURVEY-FUEL STORAGE TANKS
REPLACE FILL STATION
PROVIDE CONTAINMENT PAD AT FILL STATION
ADD SUPERVISORY CONTROLS AND METERING
FUEL STORAGE TANK LAYOUT
2 FUEL TANKS
FILL STATION
FUEL PIPING IN TRENCH
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CONDITION SURVEY-MEDICAL GAS SYSTEM
OXYGEN STORAGE TANK LAYOUT
REPLACE 1 COMPLETE TANK ASSEMBLY
REPLACE PIPING TO MANIFOLD ROOM
ADD SUPERVISORY CONTROLS AND METERING
ADD BOLLARDS AROUND OXYGEN STORAGE TANK AREA
2 OXYGEN TANKS
OLD OXYGEN TANK
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CONDITION SURVEY-UTILITY TUNNEL
HOSPITALSHAFT
POWERPLANT
MECHANICALROOM
MANY PIPE LEAKS AND PATCHES
PIPING EXPANSION PROBLEMS LEAD TO STEAM LEAK
LIMITED MEANS OF EGRESS AND LIMITED SPACE FOR REMOVAL, REPLACEMENT, MAINTENANCE
PUMPHOUSE
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LIFE SAFETY REQUIREMENTS
UTILITY TUNNEL SATISFIES SAFETY RECOMMENDATIONS
NFPA 101 40.2.1.2 – NORMALLY UNOCCUPIED UTILITY CHASES THAT ARE SECURED FROM UNAUTHORIZED ACCESS AND ARE USED EXCLUSIVELY FOR ROUTING OF ELECTRICAL, MECHANICAL, OR PLUMBING EQUIPMENT SHALL NOT BE REQUIRED TO COMPLY WITH THE PROVISIONS OF CHAPTER 7 (MEANS OF EGRESS)
STANDARD INDUSTRY PRACTICE RECOMMENDS MEANS OF EGRESS EVERY 100 METERS (TUNNEL MAXIMUM 80 M)
OSHA 1926.1023 LADDERS (TUNNEL OK)
ACCESS TO
TUNNEL FRO
M POWER
PLANT
ROOM
ACCESS TO
TUNNEL FRO
M CHILLE
D WATER
PUMP
ROOM PO
WER
PLANT
CHILLED WATER PUMP
ROOM
UTILITY TUNNEL
PIPES RISING IN MECHANICAL ROOM FROM
TUNNEL
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Switchgear & chilled water pump house building
Current MV Normal Switchgear
Proposed location for LV Switchgear
KEY PLAN
EXISTING CONDITION:
THE MV-SWITCHGEAR AND CHILLER CONTROL PANELS ARE OLD AND OBSOLETE.
Existing MV Switchgear Room
Current MV Essential Switchgear
CONDITION SURVEY-ELECTRICAL SYSTEM
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Switchgear & chilled water pump house building
Existing MV Switchgear Room
KEY PLAN
Current MV Normal Switchgear
Proposed location for LV Switchgear
Current MV Essential Switchgear
RECOMMENDATION:
THE MEDIUM VOLTAGE SWITCHGEAR PANEL, CHILLER CONTROL PANELS, POWER AND LIGHTING PANELS, SHALL BE REPLACED DUE TO THE CHANGE IN THE NOMINAL VOLTAGE.
SWITCHING FROM MEDIUM VOLTAGE TO LOW VOLTAGE REQUIRES ADDITIONAL CHANGES IN POWER.
ADD NEW GENERATOR TO FULFILL THE INCREASED LOAD REQUIREMENTS AND SEPARATING CHILLER BACKUP POWER.
CONDITION SURVEY-ELECTRICAL SYSTEM
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Structural Constraintsfor
Widening of the Existing Tunnel
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Existing service Tunnel (yellow) shown on Pile layout plan
Tunnel Section InsideBuilding Edge
Tunnel Section OutsideBuilding Edge
A A
Section A-A
B B
Section B-B
Existing Tunnel
Outside Building Edge
Outside Building Edge
Concrete Piles
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PIPING DISTRIBUTION OPTIONS
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EXISTING PIPING NETWORK
NE CHWE CHWSTM & COND
NE
CH
WE
CH
WS
TM &
CO
ND
PUMPHOUSE
NE CHWSE CHWS
NE CHWRE CHWR
POWERPLANT
HOSPITALSHAFT
MECHANICALROOM
CWHW
CWHW
CW
HW
A
C
B
D
HOSPITALSHAFT
POWERPLANT
MECHANICALROOM
PUMPHOUSE
CHILLERYARD
CHILLERYARD
MUE CHW
E CHWRNE CHWR
STM & COND
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APPROACH: CREATE ROOM IN TUNNEL BY RELOCATING COLD WATER, HOT WATER AND NON-ESSENTIAL CHILLED WATER PIPING
REPLACE REMAINING PIPING IN PHASES, CREATING DUPLICATE PATHWAYS, THEN DEMOLISH EXISTING PIPE
MAINTENANCE SPACE CREATED FOR STEAM PIPING
OPTION 1 – TUNNEL OPTIMIZATION
Option 1
EXISTING TUNNEL
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OPTION 1 – Phasing
A
C
B
D
HOSPITALSHAFT
POWERPLANT
MECHANICALROOM
PUMPHOUSE
CHILLERYARD
NEW BOX TRENCH:6 COLD AND HOT WATER PIPES
NEW BOX TRENCH:2 CHILLED WATER PIPES
EXISTING TUNNEL:4 TO 6 CHILLED WATER AND STEAM PIPES
Step 1 – create dual path for cold and hot water(Box trench)
Step 2 – connect new piping and demo old
Step 3 – create dual path for chilled water(Box trench)
Step 4 – connect new piping and demo old
Step 5 – create dual path for STEAM(Tunnel A,B,C&D)
Step 6 – connect new piping and demo old
Step 7 – create dual path for E CHW (Tunnel A)
Step 8 – connect new piping and demo old
Step 9 – create dual path for NE CHW (Tunnels D&C). Steps 9 & 10 must be completed one pipe at a time (supply, then return)
Step 10 – connect new piping and demo old
Step 11 – create dual path for E CHW (Tunnels B, C, D). Steps 11 & 12 must be completed one pipe at a time (supply, then return)
Step 12 – connect new piping and demo old
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OPTION 1 – STEP 12 Connect new pipe & demo
A
C
B
D
HOSPITALSHAFT
POWERPLANT
MECHANICALROOM
PUMPHOUSE
CHILLERYARD
E CHW
E C
HW
PUMPHOUSE
POWERPLANT
HOSPITALSHAFT
MECHANICALROOM
CHILLERYARD
CW
HW
NE
CH
W STM & COND
STM
& C
ON
D
MU
STM & CONDE CHWE CHWR
E CHWSE CHWR
NE CHW
NE CHWR
NE CHWS
NEW BOX TRENCH:6 COLD AND HOT WATER PIPES
NEW BOX TRENCH:2 CHILLED WATER PIPES
EXISTING TUNNEL:4 TO 6 CHILLED WATER AND STEAM PIPES
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ADVANTAGES:
Results in adequate maintenance space for steam and condensate piping
DISADVANTAGES:
Multiple times when contractor will be coordinating temporary interruptions for switching utilities with phased approach
Difficult working conditions will increase time for demolition and replacement
Additional piping routed through mechanical room
Contractor will be working in tunnel with live steam leak
OPTION 1 – TUNNEL OPTIMIZATION SUMMARY
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OPTION 2A – OVERHEAD BRIDGE
CREATE DUAL PATHWAY FROM PUMP HOUSE AND POWER PLANT TO MECHANICAL ROOM AND HOSPITAL SHAFT
REMOVE EXISTING PIPING IN TUNNEL LEAVING ELECTRICAL TRAY OR ABANDON COMPLETELY EXISTING TUNNEL MOVING ELECTRICAL TRAY TO NEW BRIDGE.
PROPOSED WALK OVER UTILITY BRIDGE
POWER PLANT
CHILLER COMPOUND
RC HOSPITAL LEVEL-2 ROOF
RC HOSPITAL LEVEL-5 ROOF
CHILLED WATER PUMP ROOM & SWITCH GEAR ROOM
POWER PLANT
PROPOSED HOSPITAL SHAFT
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OPTION 2A – OVERHEAD BRIDGE
SECTION A SHOWING PIPE ARRANGEMENT ON THE BRIDGE
1500 mm
A
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OPTION 2A – OVERHEAD BRIDGE SUMMARYADVANTAGES:
Overhead bridge will be constructed before demolishing any of the existing pipes
Mechanical system will remain in service until new utilities are replaced
Results in adequate space for ease of maintenance
DISADVANTAGES:
Some architectural modifications are required within hospital building to accommodate new mechanical shafts
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OPTION 2B – TUNNEL & OVERHEAD BRIDGE
CREATE DUAL PATHWAY FROM PUMP HOUSE AND POWER PLANT TO MECHANICAL ROOM AND HOSPITAL SHAFT
REMOVE EXISTING PIPING IN TUNNEL LEAVING ELECTRICAL TRAY OR ABANDON THE EXISTING TUNNEL COMPLETELY MOVING ELECTRICAL TRAY TO NEW TUNNEL.
PROPOSED TUNNEL-2PROPOSED
TUNNEL-1
RC HOSPITAL LEVEL-2 ROOF
RC HOSPITAL LEVEL-5
ROOF
PROPOSED SHAFT IN MECHANICAL ROOM
PROPOSED HOSPITAL SHAFT
POWER PLANT
CHILLED WATER PUMP ROOM & SWITCH GEAR ROOM
CHILLER COMPOUND
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OPTION 2B – TUNNEL AND OVERHEAD BRIDGE
SECTION A SHOWING PIPE ARRANGEMENT IN THE NEW TUNNEL
1500 mm
A
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ADVANTAGES:
Tunnel and overhead bridge will be constructed before demolishing anyof the existing pipes
Mechanical system will remain in service until new utilities are replaced
Results in adequate space for ease of maintenance
DISADVANTAGES:
Higher initial cost
Some architectural modifications are required within hospital building to accommodate new mechanical shaft
Requires construction above hospital ceiling space for cold and hot water piping
OPTION 2B – TUNNEL AND OVERHEAD BRIDGE
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CREATE ROOM IN TUNNEL BY RELOCATING COLD WATER, HOT WATER AND NON-ESSENTIAL CHILLED WATER PIPING
REPLACE REMAINING PIPING IN PHASES, COMBINING NON-ESSENTIAL AND ESSENTIAL PIPING TO CREATE MORE AVAILABLE SPACE
ADD NECESSARY VALVING AND CONTROLS TO ISOLATE ESSENTIAL PIPING
OPTION 3 – COMBINE NE & E CHW PIPING
EXISTING TUNNEL
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ADVANTAGES:
Results in fewer pipes to maintain/creates additional space
DISADVANTAGES:
Multiple switch over required with phased approach
Temporary piping will run through hallway during (Section D) demolition and replacement
Difficult working conditions will increase time for demolition and replacement
Requires use of ceiling space for cold and hot water piping
Contractor working in tunnel with live steam
Requires window welds to install pipe
Due to risk associated with constructability of Option 3, we do not recommend moving forward with Option 3
OPTION 3 – COMBINE NE & E CHW PIPING SUMMARY
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EQUIPMENT
NO INTERRUPTIONS OF SERVICE TO HOSPITAL(ALL EQUIPMENTS WITH REDUNDANCY)
SEQUENCING AND SERVICE INTERRUPTIONS
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THE EXISTING REDUNDANCY OF THE SYSTEMS WILL ALLOW A PHASED REPLACEMENT OF EQUIPMENT WITHOUT INTERUPTION TO THE HOSPITAL OPERATIONS
CHILLERSCHILLED WATER PUMPSBOILERSCALORIFIERSOXYGEN TANK SYSTEM
OPTIONS 1 OR 2 WILL ALLOW A REDUNDANT STEAM, CONDENSATE, CHILLED WATER, AND HOT & COLD WATER PATHWAY TO BE CREATED BEFORE THE EXISTING PIPING SYSTEMS ARE REMOVED
PROVIDE NEW GENERATOR BEFORE DISCONNECTING POWER TO CHILLERS
SEQUENCING AND SERVICE INTERRUPTIONS
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GIVEN THE RISKS ASSOCIATED WITH THE CONSTRUCTABILITY OF OPTIONS 1 & 3, THE RISKS OF HAVING CONTRACTORS WORKING NEAR LIVE STEAM LEAKS, AND THE RISKS TO HOSPITAL OPERATIONS BY CONDUCTING MULTIPLE SWITCH OVERS (FROM OLD TO NEW PIPING), WE RECOMMEND MOVING FORWARD WITH OPTION 2.
THE DIFFERENCE IN COST BETWEEN 2A AND 2B IS WITHIN THE UNCERTAINTY OF THE COST ESTIMATES.
OPTION 2A IS EASIER TO ROUTE PIPE TO THE EXISTING CONNECTION LOCATIONS AND WILL BE MORE MAINTAINABLE DUE TO BETTER ACCESS TO PIPES.
THE THREE OPTIONS HAVE BEEN PRESENTED TO END USER DURING WORKSHOPS, AND THEY FAVORED OPTION 2A – OVERHEAD DISTRIBUTION.
PIPING DISTRIBUTION RECOMMENDATION
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RECOMMEND MOVING FORWARD WITH:
CHILLED WATER SYSTEM
REPLACING 11 CHILLERS
REPLACING 3 CHILLED WATER PUMPS
REPLACING ALL CHILLED WATER PIPING
HOT WATER SYSTEM
REPLACING BOILER 1, RENOVATING BOILER 2
REPLACING IDENTIFIED ANCILLARY EQUIPMENT
REPLACING TWO CALORIFIERS
FUEL OIL SYSTEM
REPLACE FILL STATION
ADD CONTAINMENT PAD
RECOMMENDATION
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RECOMMEND MOVING FORWARD WITH (CONTINUED):
MEDICAL GAS SYSTEM
REPLACE ONE OXYGEN TANK SYSTEM
REPLACE PIPING FROM TANKS TO MANIFOLD
ADD ISOLATION BOLLARDS
DISTRIBUTION PIPING
REPLACE ALL PIPING AND FITTINGS
ROUTE PIPE IN NEW OVERHEAD BRIDGE (OPTION 2A)
RECOMMENDATION
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RECOMMEND MOVING FORWARD WITH (CONTINUED):
ELECTRICAL SYSTEM
CONSTRUCT NEW LV - SWITCHGEAR ROOM
REPLACE SWITCHGEAR PANEL, CHILLER CONTROL PANELS CWSA, CWSG AND CWH1, POWER AND LIGHTING PANELS CWA, CWB AND CWB
REPLACE MOTOR CONTROL CENTRES
INSTALL NEW GENERATOR 1750 KVA
UPGRADE FIRE ALARM SYSTEM FOR SWITCHGEAR AND CHILLED WATER PUMP HOUSE.
RECOMMENDATION
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SUMMARY
OPTION 1 OPTION 2A OPTION 2B OPTION 3
TUNNEL OPTIMIZATION
OVERHEAD BRIDGE TUNNEL AND OVERHEAD
COMBINE NE & E CHW
COST 59,111,000 55,658,000 57,640,000
NOTRECOMMENDED
PHASING Complex phasing Simple phasing Simple phasing
COMPLEXITYDifficult working conditions andlimited access
Not complex and easy installation
Not complex and easy installation