by Elena Perez Rodriguez Index Introduction Technical specification Design and configurations Purchase documents Price list and adjudication formula Risk matrix Conclusion 24112010 Thermosiphon project ID: 781240
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Slide1
Chiller design and purchase
by Elena Perez Rodriguez
Slide2Index
Introduction
Technical specification
Design and configurationsPurchase documentsPrice list and adjudication formulaRisk matrixConclusion
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Slide3Introduction
This presentation will go through both the technical and purchase documents.
These documents and the annexed can be found in
EDMS 1078475
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Slide4Technical specification
Overview of the design and the technical specification document
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Slide5Technical specification
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Slide6CHILLER UNIT(S)
BRINE
Scope of the tender
6
Primary
water
Chiller and brine : design, selection & purchase of components, refrigerants for chiller, construction, skids, installation, connection and commissioning
Thermosiphon
condenser and piping
Spares
(1 year & 10000 h)
Electrical design, functional analysis, electrical/control components, cabling and electrical/control cabinets
Documentation and labeling
Terminal blocks, PLC and
software (UNICOS)
Fluid for the brine
Slide7General conditions for tendering
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Documents to be sent with the
tender
Slide8Delivery schedule
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March 2011
April 2011
September 2011
October 2011
December 2011
Slide9Technical requirements
Chiller units
Two circuits in cascade (high and low temperature).
Refrigerant to be chosen by contractor.
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Operation regimes
Nominal operation
Emergency situation
Cooling power in the Thermosiphon condenser
180 kW
50 kW
Temperature at the inlet of the Thermosiphon
condenser
-70
°
C
-20
°
C
Temperature at the outlet of the Thermosiphon
condenser
-65
°
C
-15
°
C
Maximum pressure drop
4
bar
4
bar
Brine circuit
Mono-phase liquid C
6
F
14.
Materials shall be compatible with fluorocarbons.
Slide10Chiller configuration A
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C3F8 condenser
180 kW
-70 °C
liquid
tank
USA15
cavern
Surface
C6F14 brine circuit
Primary water
25°C
CHILLER 3
50% power for nominal operation
ATLAS ID
Detector
UX15
cavern
Back-up
50 kW
-20 °C
Brine circuit
Redundant pumps
CHILLER 2
50% power for nominal operation
CHILLER 1
50% power for nominal operation
Slide11P&I for the configuration A
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Chiller configuration B
liquid
tank
USA15
cavern
Surface
C6F14 brine circuit
Primary water
25°C
CHILLER 4
100% power for nominal operation
Redundant
CHILLER 5
For emergency situation
ATLAS ID
Detector
UX15
cavern
C3F8 condenser
180 kW
-70 °C
Back-up
50 kW
-20 °C
Brine circuit
Redundant pumps
CHILLER 6
For emergency situation
Slide13P&I for the configuration B
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Slide14Configurations:
advantages and disadvantages
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Configuration A
Configuration B
Comments
Not impact on
operation
for
preventive
maintenance
Higher
r
isk of impact on operation of
preventive
maintenance
Mitigation : use
of the brine circuit.
Circuit
redundancy
Not impact on operation for
single
failures
Mechanical redundancy
Impact
on operation
for
failures in
no-duplicated components.
Impact
on operation
in
case
of degradation
of the
circuit .
Mitigation : use of the HAUG station.
Power requirements:
Standard power 160 kW
Diesel power 75 kW
Power requirements:
Standard power 205 kW
Diesel power 50 kW
Depends
on
electrical
services in Point 1.
Balanced operation of compressors.
Unbalance operation of the
compressors.
Mitigation : schedule
for running the emergency chiller units.
Easier operation and control logic ?
More complicated operation and control logic ?
This is not for sure
Less spare parts required ?
More spare parts required ?
The thermosiphon works with BOTH solutions
The HAUG station will be a back-up
Difference in costs is unknown
Slide15Chiller configuration A
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Standard power supply
Diesel power supply
30 kW
45 kW
45 kW
25 kW
45 + 45 kW
45 kW
45 kW
Slide16Chiller configuration B
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Standard power supply
Diesel power supply
25 kW
180 kW
20 kW
20 kW
30 kW
Slide17Design
Operation and reliability
Power regulation
20 ÷ 100%
Temperature regulation20°C ÷ -70°CPrecision ± 1 K
CompressorMTBF > 40,000 hMTTR < 10 h
Chiller system
MTBF > 20,000 h
Other
Seismic requirements
(Olga Beltramello)
Sound level
(Flora Galvan)
Reliability and risk analysis
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Slide18Integration
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To be approved
Will be shown in the bidders conference
Slide19Assembly
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Pre-assembled in metallic frames (skids)
Control and electrical cabinet will also be pre-assembled
Slide20Assembly and commissioning
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Slide21Maintenance and documentation
Maintenance
Preventive maintenance plan and spare parts list provided by supplier (CERN template).
Preventive maintenance shall be done during nominal operation at full power.
DocumentationTemplates provided for: Technical dossier (STA), Functional analysis.Labeling
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Slide22Purchase documents
Adjudication formula explanation, options and chosen solution.
Risk matrix
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Slide23Adjudication: options
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Slide24Adjudication
formula
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IT-3684/EN/ATLAS - DQE - DESCRIPTION AND QUANTITY ESTIMATE
Chapter 2 - Option B
CHILLER 3
Chapter
Cost
High temperature circuit
301
Compressor
302
Oil recuperation circuit
303
Primary water condenser
304
Heat exchagner with low temperature circuit
305
Brine circuit evaporator
306
Expansion vessel
307
Fluid
Low temperature circuit
308
Compressor
309
Oil recuperation circuit
310
Brine circuit evaporator
311
Expansion vessel
312
Fluid
General
313
Valves
314
Piping and insulation
315
Instrumentation
316
Electrical components (including cabinets)
317
Metallic frame (skid)
318
Mechanical assembly
319
Electrical connection
320
Spare parts for one year & 10000 h of compressors
321
Tests
Total price for chiller 3
Total price for option
B
Configuration A
Chapter
Cost
A1
Option A
A2
Option B
A3
Option F
Configuration B
Chapter
Cost
B1
Option C
B2
Option D
B3
Option E
B4
Option F
Spare parts
Chapter
Cost
C1
Spare compressor(s) for configuration A
C2
Spare compressor(s) for configuration B
Adjudication
price
Conf A + 1.1*Conf B + Spare comp A + Spare comp B
2
Slide25Adjudication
Practical example
Company
Configuration A
Configuration B (penalization 10%)
Price for Adjudication
I (price)
100
100
I
(adjudication)
100
110
105
II (price)
110
80
II (adjudication)
110
88
97
III
(price)
90
100
III (adjudication)
90
110
100
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Adjudication
price
Configuration A + 1.1*Configuration B + Spare comps
2
Slide26Risk matrix
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RISK
LIKELIHOOD
IMPACT
DECISION
HOW TO MITIGATE IT
1
The contractor lacks experience
Possible (has already happened)
Moderate
Mitigation (fill in next field )
Require a minimum number of similar references for the selected company, criteria 4.1
2
The contractor lacks resources
Possible (has already happened)
Major
Mitigation (fill in next field )
Require a minimum number of employees and turnover, criteria 5.1 and 5.2
3
The contractor missinterpretates the Invitation to Tender documents
Possible (has already happened)
Major
Mitigation (fill in next field )
Bidders conference.
Close follow up of the contract.
4
The deadlines are not respected
Likely (50% probability)
Major
Mitigation (fill in next field )
Close follow up of the contract.
5
Unexpected end of the contract
Rare (never happens)
Catastrophic
Mitigation (fill in next field )
The contractor has to have an insurance (as stated in the § 3 of the IT document).
A list of qualified companies has to be available to be able to place another contract.
6
The equipment delivered does not correspond to the required performances
Possible (has already happened)
Major
Acceptance
7
Maintenance plan is more expensive than expected
Likely (50% probability)
Moderate
Acceptance
8
Extra costs associated to the equipment
Possible (has already happened)
Moderate
Acceptance
9
Reliability problems of the equipment purchased
Possible (has already happened)
Major
Mitigation (fill in next field )
Bank warranty
Spare part purchased with the contract
Slide27Conclusions
An overview of the design of the chiller has been shown.
The adjudication formula has been justified and discussed.
The risk matrix has been presented.
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Slide28Thank you for your attention
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Any questions ?