overview
Download
Skip this Video
Download Presentation
Overview

Loading in 2 Seconds...

play fullscreen
1 / 10

Overview - PowerPoint PPT Presentation


  • 81 Views
  • Uploaded on

Overview. Maximum Δ T admissible at cooling system. T_1. T_1+0.5* Δ T. Stave. T_2. If T_2 – T_1 = 6 K, the maximum Δ T at the stave would be 0.5*(T_2-T_1) = 3 K In the prototypes tested up to now, Δ T in the water maximum was 3 K

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Overview' - lorand


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
overview
Overview

Maximum ΔT admissible at cooling system

T_1

T_1+0.5*ΔT

Stave

T_2

  • If T_2 – T_1 = 6 K, the maximum ΔT at the stave would be 0.5*(T_2-T_1) = 3 K
  • In the prototypes tested up to now, ΔT in the water maximum was 3 K
  • A smaller flow rate can be set at the prototype for the configuration above.

Pipe erosion considerations

  • Usually, two fluid velocities are important:
    • Minimum velocity: avoids depositions inside the piping.
    • Maximum velocity: avoids failure by pipe erosion throughout piping lifetime.
  • The manufacturer should provide the operating conditions.
  • A definitive choice of pipe must be done.

WG4 Meeting - 16th October 2012

overview1
Overview

Maximum ΔT admissible at cooling system

T_1

T_1+0.5*ΔT

Stave

T_2

  • If T_2 – T_1 = 6 K, the maximum ΔT at the stave would be 0.5*(T_2-T_1) = 3 K
  • In the prototypes tested up to now, ΔT in the water maximum was 3 K
  • A smaller flow rate can be set at the prototype for the configuration above.

Pipe erosion considerations

  • Usually, two fluid velocities are important:
    • Minimum velocity: avoids depositions inside the piping.
    • Maximum velocity: avoids failure by pipe erosion throughout piping lifetime.
  • The manufacturer should provide the operating conditions.
  • A definitive choice of pipe must be done.

To be done

WG4 Meeting - 16th October 2012

overview2
Overview

Piping diameter for two-phase cooling system

  • Based on results obtained with D08 prototype and C4F10, and using correlations to back up the ΔTSat for the experienced Δp.
  • For given mass flow rate -> max. ΔTSat-> max. Δp allowed -> Pipe Dmin
  • Pipe-refrigerant compatibility:
    • C4F10 is not compatible with the PTFE (Teflon) pipe that has been ordered to avoid the connection at the the turn of the cooling pipe.
    • Detector Cooling database provides information on this subject.

Material budget considerations

  • Prototype thermal optimization done.
  • Precise calculation of the local and average material budget for the present and optimized prototypes would help optimizing from material budget viewpoint.
  • Estimation important for the prototypes at the outer layers.

WG4 Meeting - 16th October 2012

overview3
Overview

Piping diameter for two-phase cooling system

  • Based on results obtained with D08 prototype and C4F10, and using correlations to back up the ΔTSat for the experienced Δp.
  • For given mass flow rate -> max. ΔTSat-> max. Δp allowed -> Pipe Dmin
  • Pipe-refrigerant compatibility:
    • C4F10 is not compatible with the PTFE (Teflon) pipe that has been ordered to avoid the connection at the the turn of the cooling pipe.
    • Detector Cooling database provides information on this subject.

To be done

Material budget considerations

  • Prototype thermal optimization done.
  • Precise calculation of the local and average material budget for the present and optimized prototypes would help optimizing from material budget viewpoint.
  • Estimation important for the prototypes at the outer layers.

To be done

WG4 Meeting - 16th October 2012

its external layers
ITS External Layers
  • Preliminary estimations: based on the High Thermal Conductivity Plate design.

D-pipe??

  • Parameters to define: D_pipe, plate thickness, material budget.

WG4 Meeting - 16th October 2012

its external layers1
ITS External Layers

Power dissipation

Pipe diameter estimation

WG4 Meeting - 16th October 2012

its external layers2
ITS External Layers

Pressure drop estimation

WG4 Meeting - 16th October 2012

its external layers3
ITS External Layers

Mechanical constraints

  • Option A: stave is a full module.
    • Sag can be a problem: L4-5 -> 843 mm; L6-7 -> 1475 mm long
    • Manufacturing?
  • Option B: stave composed by multiple modules.
    • Need connections for piping and supports along the stave.
    • Bigger material budget? Leaks?
  • Mechanical constraints seem tighter than the cooling requirements.

WG4 Meeting - 16th October 2012

dsf water tests
DSF water tests

Circuit status

  • By-pass made to increase the demand of water at our output and prevent pressure oscillations (needs optimization).
  • Pressure fluctuations at the inlet not suppressed so far:
    • Agree with other users of water circuit on a schedule?
    • Use independent plant (TRD Cuvee, ATLAS Julabo).

Prototype tests: status

  • Wound-truss structure with 0.1 mm thick carbon fiber (D10): tests undergoing.
  • HTC Plate structure (D11): heater not glued yet
    • Similar to D06 prototype (performed under 30 °C)
    • Essential to fully understand and characterize the behavior of this solution.

WG4 Meeting - 16th October 2012

dsf water tests1
DSF water tests

Circuit status

  • By-pass made to increase the demand of water at our output and prevent pressure oscillations (needs optimization).
  • Pressure fluctuations at the inlet not suppressed so far:
    • Agree with other users of water circuit on a schedule?
    • Use independent plant (TRD Cuvee, ATLAS Julabo).

Prototype tests: status

  • Wound-truss structure with 0.1 mm thick carbon fiber (D10): tests undergoing.
  • HTC Plate structure (D11): heater not glued yet
    • Similar to D06 prototype (performed under 30 °C)
    • Essential to fully understand and characterize the behavior of this solution.

To be done

WG4 Meeting - 16th October 2012

ad