CLIC MODULE Nominal Operation Mode Temperature Results Daskalaki - - PowerPoint PPT Presentation

CLIC MODULE

Nominal Operation Mode

Temperature Results

Daskalaki Elena Vamvakas Alex Xydou Anastasia

Contents

• 1. Description
• 2. FEA simulator
• 3. Tests summary
• 4. Preparation phase
• 5. Experiment
• 6. Temperature

a) Results b) Theoretical analysis

• 7. Conclusions

Description

The aim of the thermal tests is to: i) Investigate the response of the CLIC module with respect to temperature and displacement when operation-equivalent thermal power is applied ii) Develop and validate a FEA model for the thermal and mechanical simulation of CLIC module

Ambient temperature Air velocity Water temperature Temperature Displacement Thermal power Water flow rate: ΔΤ=Τwater,out-Τwater,in

CLIC module 3

FEA simulator

4

8

1a Main Beam Girder 1b Drive Beam Girder 2 SAS 3 Compact Load 4 PETS Unit 5 DBQ 6 RF network 7 Vacuum Network 8 Cooling system SAS 9 Cooling system PETS

9

5

• RF structures are supported by the V-shaped supports
• Girders are supported by linear actuators modelled by using springs
• Bellows have been modelled by using equivalent stiffness elements

with 6 degrees of freedom: axial, 2 angular, 2 lateral and torsional

DB cradle and actuators Bellows in ANSYS

FEA simulator

6

COMPONENTS NOMINAL POWER (W) SAS 820 PETS 110 CL 150 DBQ 150

• Heaters used in the thermal tests have been modelled in the simulation

FEA simulator

Phase 1: Preliminary tests

7

STEP # INPUT OUTPUT Tamb (°C) vair (m/s) Q (%) Ti,water (°C) To,water (°C) SAS AS Load PETS RFN Load DBQ SAS (+10 °C) PETS (+15 °C)

0.1 20 0.3 NA NA NA 1. WPS system (study influence

• f vibrations induced by air

speed on WPS measuring system) 0.2 20 0.4 NA NA NA 0.3 20 0.5 NA NA NA 0.4 20 0.6 NA NA NA 0.5 20 0.7 NA NA NA 0.6 20 0.8 NA NA NA

1

1.1 20 0.3 NA NA NA 1. Temperature sensors 2. Alignment 1.2 30 0.3 NA NA NA 1.3 40 0.3 NA NA NA

2

2.1 20 0.4 50 50 25 30 NA 1. Temperature sensors 2. Alignment 2.2 20 0.4 100 100 25 35 NA 2.3 20 0.8 50 50 25 30 NA 2.4 20 0.8 100 100 25 35 NA 2.5 40 0.4 50 50 25 30 NA 2.6 40 0.4 100 100 25 35 NA 2.7 40 0.8 50 50 25 30 NA 2.8 40 0.8 100 100 25 35 NA

3

3.1 20 0.4 50 50 5 25 NA 32.5 1. Temperature sensors 2. Alignment 3.2 20 0.4 100 100 10 25 NA 40 3.3 20 0.8 50 50 5 25 NA 32.5 3.4 20 0.8 100 100 10 25 NA 40 3.5 40 0.4 50 50 5 25 NA 32.5 3.6 40 0.4 100 100 10 25 NA 40 3.7 40 0.8 50 50 5 25 NA 32.5 3.8 40 0.8 100 100 10 25 NA 40

4

4.1 20 0.4 50 50 50 50 5 25 30 32.5 1. Temperature sensors 2. Alignment 4.2 20 0.4 100 100 100 100 10 25 35 40 4.3 20 0.8 50 50 50 50 5 25 30 32.5 4.4 20 0.8 100 100 100 100 10 25 35 40 4.5 40 0.4 50 50 50 50 5 25 30 32.5 4.6 40 0.4 100 100 100 100 10 25 35 40 4.7 40 0.8 50 50 50 50 5 25 30 32.5 4.8 40 0.8 100 100 100 100 10 25 35 40

* EDMS# 1277574

Phase 2: Duty cycles tests

STEP # INPUT Tamb (°C) vair (m/s) Q (W) Ti,water (°C) ΔTo,water (°C) SAS AS Load PETS RFN Load DBQ SAS PETS

Nominal

• peration

mode DBQ only 20 0.7 150 25 Unloaded 20 0.7 820 178 220 178 150 25 10 6 Loaded 20 0.7 683 137 220 178 150 25 8.3 6 DBQ only 40 0.7 150 25 Unloaded 40 0.7 820 178 220 178 150 25 10 6 Loaded 40 0.7 683 137 220 178 150 25 8.3 6 Failure mode SAS breakdown Loaded 20 0.7 683 137 220 178 150 25 8.3 6 SAS breakdown 20 0.7 27.4 220 178 150 25 6 PETS off 20 0.7 27.4 55 150 25 1.5 Loaded 20 0.7 683 137 220 178 150 25 8.3 6 Loaded 40 0.7 683 137 220 178 150 25 8.3 6 SAS breakdown 40 0.7 27.4 220 178 150 25 6 PETS off 40 0.7 27.4 55 150 25 1.5 Loaded 40 0.7 683 137 220 178 150 25 8.3 6 Failure mode PETS breakdown Loaded 20 0.7 683 137 220 178 150 25 8.3 6 PETS breakdown 20 0.7 683 137 55 150 25 8.3 1.5 SAS off 20 0.7 27.4 55 150 25 1.5 Loaded 20 0.7 683 137 220 178 150 25 8.3 6 Loaded 40 0.7 683 137 220 178 150 25 8.3 6 PETS breakdown 40 0.7 683 137 55 150 25 8.3 1.5 SAS off 40 0.7 27.4 55 150 25 1.5 Loaded 40 0.7 683 137 220 178 150 25 8.3 6

8

* EDMS# 1332627

Preparation phase

• 1. Power measurement
• 2. Air speed measurement
• 3. Water flow meter
• 4. Water valves

Scope: Verification of experimental inputs

9

Experiment

10

Experiment

11 Zero position Power-up DBQ Unloaded conditions Loaded conditions

24/02/14 20/02/14

Zero position Power-up DBQ Unloaded conditions Loaded conditions

25/02/14

Power-up DBQ Loaded conditions Zero position Unloaded conditions DBQ#1 every 1 oC PETS#1 and AS#5 every 1 oC AS#5 every 1 oC DB and MB DB and MB DB and MB DB and MB

Results

Water only Unloaded Loaded

Temperature evolution (Zero - Unloaded - Loaded conditions)

12

Temperature fluctuation: ± 0.2 oC

Results

Components’ temperatures in steady-state (oC)

13

DBQ only Unloaded Loaded Experiment Simulation Diff. Experiment Simulation Diff. Experiment Simulation Diff. SAS#1 23.7 24.5 0.8 29.5 31.9

• 2.4

29.0 30.7

• 1.7

SAS#2 24.3 24.5 0.2 32.2 29.7 2.5 31.5 29.3 2.2 SAS#3 24.4 24.5 0.1 32.2 31.8 0.4 31.5 31.2 0.3 SAS#4 24.2 24.4 0.2 32.2 29.2 3.0 31.5 29.0 2.5 PETSu#1 22.7 23.2 0.5 25.9 29.8

• 3.9

26.4 27.6

• 1.2

PETSu#2 23.2 23.2 0.0 29.4 32.4

• 3.0

30.1 29.3 0.8 DBQ#1 37.6 39.3 1.7 34.4 32.2 2.2 33.2 31.8 1.4 DBQ#2 36.1 38.4 2.3 33.6 33.9

• 0.3

31.8 33.6

• 1.8

Results

Component Time constant τ (min) SAS#1 5.16 SAS#2 5.30 SAS#3 5.05 SAS#4 5.08 AS Load 1 1.86 AS Load 2 2.00 AS Load 3 1.90 AS Load 4 1.80 PETSu#1 16.19 PETSu#2 18.83 WG 18.61 RFN Loads 1.80 Thermal time constants 14

20 25 30 35 40 10 20 30 40

ΔΤ τ 62.3% of ΔΤ

𝑈 = 𝑈

𝑛𝑏𝑦 − 𝑈0𝑓−𝑢 𝜐

Theoretical analysis

Twater, out Twater, in ΔTwater Tamb

Qwater

15

Qair

Q

A T T h Q

amb comp air

) (   

) (

, , in water

• ut

water p water

T T c m Q    

Theoretical analysis

Twater,in

(oC)

Twater,out

(oC)

ΔT

(oC)

Qwater

(W)

Tamb

(oC)

Tcomp

(oC)

Qair

(W)

Qtot

(W)

F

(m3/h)

Fmeasured

(m3/h)

SAS1 24.12 30.02 5.90 744 20.00 29.16 73 817 0.108 SAS2 24.44 32.12 7.69 720 20.00 32.18 97 817 0.081 SAS3 25.05 35.01 9.96 701 20.00 34.53 116 817 0.061 SAS4 25.12 33.34 8.22 714 20.00 32.94 103 817 0.075 SAS total 0.324 PETS 24.63 29.37 4.74 267 20.00 27.79 153 420 0.048 Total 0.373 0.311

16

• One flow meter measures the total flow
• Flow at each cooling channel (4 SAS and PETS) is not known

Flow meter accuracy: ± 2% measured value

Theoretical analysis

17  Power and water separately in MB and DB

MB only

Twater,in

(oC)

Twater,out

(oC)

ΔT

(oC)

Qwater

(W)

Tamb

(oC)

Tcomp

(oC)

Qair

(W)

Qtot

(W)

F

(m3/h)

Fmeasured

(m3/h)

SAS1 24.07 34.95 10.87 744 20.00 29.16 73 817 0.059 SAS2 24.67 35.02 10.35 720 20.00 32.18 97 817 0.060 SAS3 25.19 35.02 9.82 701 20.00 34.53 116 817 0.061 SAS4 25.23 35.22 9.99 714 20.00 32.94 103 817 0.061 SAS total 0.241 0.257 DB only

Twater,in

(oC)

Twater,out

(oC)

ΔT

(oC)

Qwater

(W)

Tamb

(oC)

Tcomp

(oC)

Qair

(W)

Qtot

(W)

F

(m3/h)

Fmeasured

(m3/h)

PETS 24.54 29.45 4.91 219 20.00 30.19 201 420 0.038 0.039

Conclusions

18

• CLIC nominal operation mode was simulated in the CLIC module @ 20 oC.
• Temperature and displacement were measured during steady states and transients.
• The experimental results have been comparatively assessed to:
• 1. The results of the FEA simulator
• 2. Theoretical heat transfer calculations
• The FEA simulator predicts effectively the experimental temperature response due to

power, water flow and ambient conditions.

• The theoretical calculations match well to the experimental data.
• The FEA simulator is under constant improvement and the results show gradual

convergence to experimental measurements.

Future work

19 In order to improve both theoretical analysis and FEA performance the following steps will be taken:

• 1. Enhancement of the measured water flow accuracy by installing one flow meter to

each cooling circuit (4 SAS and PETS)

• 2. Further investigation of FEA simulator with emphasis on:
• Contacts
• Boundary conditions
• Cooling channel simulation using computational fluid dynamics

Continue the duty cycle tests

• 1. Nominal operation mode @ 40 oC
• 2. Failure modes