CRISP: 2nd Annual Meeting, PSI, Villigen, Switzerland
Jorge Sánchez Rosado
Work package 13 – CO2 Cooling
CRISP: 2nd Annual Meeting, PSI, Villigen, Switzerland
TABLE OF CONTENTS
1.STS-CBM thermodynamical requirements
2.I-2PACL principle (Under patent)
3.Introduction to TRACI-XL
4.System diagram (State points + Ph diagram)
5.CO2 Line
a) Remote head pump
b) Pulsation Dampener
c) Accumulator
6.Condensing Unit + Interface (Heat exchanger)
7.P&ID
8.Control system
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1. STS-CBM thermodynamical requirements
The requirements for the STS cooling are twofold:
• The innermost sensors with high radiation load have to be kept at or below -5 ⁰C
Cooling based in gaseous, convective cooling of the (innermost) silicon sensors and
other heat generating components, like power cables.
•
Complete removal of the heat dissipated by the front-end electronics boards.
This a prerequisite of the first requirement.
System based in an evaporative CO2 cooling of the front-end electronics, which is
located in the FEE blocks.
This kind of evaporative cooling based on CO2, is also under consideration and thus
under intense technical development for upgrades of the silicon trackers of LHC
experiments.
The total heat power dissipated by the STS components is estimated as:
212 FEE blocks at 200 W (10 FEBs with 20 W each), resulting in a power dissipation of 42.4 kW.
The innermost sensors around the beam pipe with the highest radiation load will dissipate in operation
around 6 mW on (2 x 3) cm2 after the accumulation of a certain radiation dose.
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2. I-2PACL principle (Under patent)
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3. Introduction to TRACI-XL
P = 1kW @ -30 ⁰C
2000
Liquid piping:
𝑚 = 15
𝑔
𝑠
O.D. 1/4 “ = 6.35 mm
th = 0.889
Liquid+gas piping: O.D. 3/8 “ = 9.525 mm
th = 0.889
• Upgrade of TRACI up to 1kW unit.
• Accumulator  MARCO’s Adaption
• LEWA remote head Pump
• PLC Siemens Simatic S1200 controlled
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4. System diagram (State points + Ph diagram)
FL
VL
ø3/8”x0.035 Gas line
ø1/4”x0.035 Liquid line
Fill
FT
FL
Concentric
Hose
3
2
CO2 Line
Thermal Box
VL
𝑚 = 15 𝑔/𝑠
Accumulato
r
PM
Flow regulation
VL
VL
Accumulator
Control
7
5
HT
6
Control Box
Set Point
Experiment
venting
8
VL
PR
Condensing Unit
1
Heat Exchanger
5
4
Ac
1
Q VL
2
Capacity
Control
Compressor
TEV
3
4
R404a
Condenser
Vessel
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-40 ⁰C
-45 ⁰C
4. System diagram (State points + Ph diagram)
-30 ⁰C
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1-2  Pumping:
Psuctionline = 15 bar Pdischargeline = 27 bar
ΔPpump = 12 bar
h1(-45) = 102.57 kJ/kg
Qpump?? = mco2(h2-h1) =
= 0.015(108.88-102.57) = 0.09 kW
increment of 3 ⁰C
h1 = 102.57 kJ/kg h2 = 108.88 kJ/kg
2-3 Coil heating:
Qcoil = mco2 (h3 – h2) =0.165 kW
h3 = 119.88 kJ/kg
3-4  Inner hose:
Qtransferline = mco2 (h4 – h3) = 0.3 kW
h4 = 139.88kJ/kg
(Hose calculation required)
4-5 Restriction valve:
ΔP = -12 bar h5 = h4 = 139.88 kJ/kg
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5-6  DETECTOR:
Qdetector = mco2 (h6 – h5) = 1kW
h6 = 206.55 kJ/kg
6-7  Outer hose:
Qtransferline = mco2 (h7 – h6) = 0.3 kW
h7=186.55 kJ/kg
(Hose calculation required)
7-1  Heat Exchanger:
Qhex = mco2 (h1 – h7) = -1.26 kW
interpolating we should set up the
compressor working at:
30 hz provides 0.5kW
87 hz provides 1.6 kW
Therefore 1.26kW are providing fixing a
frequency of 69.38hz
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5a. CO2 Line: Remote Head Pump
At least 30°
inclination &
Less than 1m
oil transfer line
redesigned @ GSI
AeroShell Fluid 4
QTRACIXL = 48.30 l/h
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5b. CO2 Line: Pulsation Dampener
Necessity of a pulsation dampener to prevent pulsations which produce negative effects in the
stability of the temperatures and therefore in the heat extraction by the biphasic system.
Discharge pressures LEWA pump:
Pd,min=22 bar Pd,max=79 bar
Pmin=P1=20.9 bar Pmax=P2=82.95 bar
Dampener should be able to work in this range.
Pt ≈ theoretical or work pressure. Residual pressure admitted ±5%
(by now)
P1 = Pt1 - ( 5/100 ) ∙ Pt2 = 20.9 bar
(1)
P2 = Pt2 + ( 5/100 ) ∙ Pt1 = 82.95 bar
Plunger: ø=25mm L=15 mm dv=7363.11 mm3
If
V 1 = V0 – v, and v = 0.1 ∙ V0
We have
V 1 = 0.9 ∙ V0
(2)
And also
V 2 =V1- dv
(3)
From (1) and (2) we obtain P0=0.9xP1 = 18.81 bar
(4)
Finally from (1) (2) (3) and (4) we will obtain:
P0 ∙ V0=P2 ∙ V2 ; 0.9P1 ∙ V0=P2 (V1-dv) =P2 (0.9V0-dv)
From the underlined equalities we have the final formula
𝑃2 ∙ 𝑑𝑣
𝑉𝑜 =
= 13671.09 𝑚𝑚3 = 13.67 𝑐𝑚3
0.9(𝑃2 − 𝑃1 )
This will change the charging gas value at 20 ⁰C (take note that for a
10 ⁰C of temperature variation the gas pressure will change approx.
a 3%)
This volume has to be equal to ”V2” from the formula P2/P0 = V0/V2
then:
( V0 / 13.67 ) = ( 82.95/ 18.81 ) and V0 = 60.28 cm3
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Dampener effect
Values for a possible version applied in TRACI-XL:
• Bladder: NBR Low Temperature -40/85 ⁰C
• With 150 ml of oil for low temperatures
inside the bladder
• Pre-charged at 18 bar
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5c. CO2 Line: Accumulator
Data sheet:
1x Accumulator, according to drawing 1-10.456-01
Design code : R.T.o.D. / PED
Design conditions : 110 Barg @ -55/40°C (vessel).
Design conditions : 110 Barg @ -55/40°C (coil).
Medium : Harmless, gas.
Category / Module : II / A1.
Material : 1.4404/316L.
Corrosion allowance : 0mm.
Shell : ø168.3x10.97mm, LG.400mm.
Heads : 2x pipecap, 6”sch.80s.
Coil : ø6.35x1.24mm.
Connections : See drawing.
resizing
- Resizing of the diameter of the coil to ¼”
- Inlet and outlet coming from the top of the vessel
instead like from the bottom as in MARCO
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6. Condensing Unit +Interface (Heat exchanger)
System performance:
at 30 Hz aprox. ; Qo = 0,50 kW, To = -45 ⁰C, Tsuction = -30 ⁰C, Tc = +35 ⁰C,
Tsc = 3 K, Tsh = 5 K? R404a.
at 87 Hz aprox. ; Qo = 1,60 kW, To = -45 ⁰C, Tsuction = -30 ⁰C, Tc = +35 ⁰C,
Tsc = 3 K, Tsh = 5 K? R404a.
All parts functionally mounted
on the compressor base plate.
- Compressor with crankcase heater, discharge and suction service valve, frequency inverter, HP/LP safety switch.
- Discharge line with vibration damper.
- Condenser with condenser fan 1x230V.
- Hot gas bypass valve including service valve.
- Alfa Laval heat exchanger AXP10-10H-F
- Swagelok connections on CO2 side.
- Suction line mounted with vibration dampener and suction accumulator both insulated with Armaflex.
- Gauge panel with two service valve, LP and HP pressure transmitter.
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6. Condensing Unit +Interface (Heat exchanger)
• Reliable brazed heat exchanger used @CERN with enough
capacity for a maximum 1.6 kW provided by the chiller.
• In terms of pressure is more than enough for CO2 applications.
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7. P&ID
Based in EN81346-1, EN81346-2, EN 61175 will be translated to CERN nomenclature
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7. TRACI-XL Control System
•
•
•
•
For TRACI-XL PLC Siemens S1200 replaces rail transmitters used in TRACI
Distributed Inputs/Outputs modules
PROFINET protocol
HMI touch panel to have total automation control from TRACI-XL
Data logging
847
In contact with
Siemens to clarify
Siemens TIA V11 (2 licenses @ CBM)
Control cabinet 544x800x847 enough?
PROFINET protocol
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Analog inputs
Digital output
•RTD signal (Pt 100)
(1) BT01 (Temperature transmitter - pump inlet/heat exchanger
output)
(2) BT02 (Temperature transmitter - pomp outlet)
(3) BT03 (Temperature transmitter – Accumulator gas)
(4) BT04 (Temperature transmitter – Accumulator coil outlet)
(5) BT05 (Temperature transmitter – supply line,before lexible trans.
line)
(6) BT06 (Temperature transmitter – experiment input)
(7) BT07 (Temperature transmitter – experiment output)
(8) BT08 (Temperature transmitter – Heat exchanger input)
• Compressor frequency,
•Chiller condenser fan
•Service valve(HB chiller)
• Pump Frequency?
SM 1231 RTD Module
8 Analog input RTD signal
•Other sensors
•(1) BT09 (Termocouple type K on EB01)
•(2) Experiment heater protection
•(3) BP01 (Pressure transmitter – accumulator pressure)
•(4) BP02 (Pressure transmitter - supply line,before flexible trans.
line)
•(5) Pressure transmitter – R404A chiller suction line
•(6) BF01(Mass flow meter)
Power supply Input 120/230 V AC,
output 24 V DC/2.5 A
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S7-1200 CPU 1215C
14 Digital input
2 Analog input (0-10V)
10 Digital output
2 Analog output (0-20mA)
SM 1231 TC Module
4 Analog input - termocouple
SM 1231 AI Module
4 Analog input
(±10V, ±5V, ±2.5V, ±1.25V 0-20mA, 4-20mA)
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Inputs / Outputs
-
Temperature sensors PT100 OD4mm (NiCrNi) by RODAX. (8UNITS)
-
Pressure sensors Unik 5000 PTX5072-TC-A2-CA-H0-PE 0-100bar abs by General Electric (2 UNITS, PROBABLY 3)
-
Coriolis Mass flow meter Rehonik RHM03 TA P1 PMO MO N1 AT without terminal box with Mass flow
transmitter RHE14 T1 D1 I2 N by General Electric (1 UNIT)
-
Pump LEWA: Manometer pressure gage ? + Frequency.
-
Heater with thermocouple type k (NiCr-Ni) 1000W 80mm TC 'k' 3000mm by Türk Hillinger (1UNIT)
- Condensing unit R404 1.57kW evaporating system -45⁰C :
LP and HP pressure transmitter
Main switch
Johnson control (fan speed regulator)
Lodan compressor/condenser regulator with display
Potential contacts for running and alarm.
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FOR YOUR
ATENTION
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