Alphasat TDP#3: 2-Phase Deployable Radiator

  • Status
    Ongoing
  • Status date
    2008-11-26
Objectives

The development of large deployable radiators is needed to meet the power dissipation requirements for new upcoming spacecrafts. Satellite prime contractors (EADS/Astrium and Alcatel Alenia Space) and product supplier (EHP) have decided to cooperate in order to supply a common deployable radiator product.

Because of the critical requirements on mass and thermal conductance, innovative solutions will be considered in order to propose a high performance product at low cost and at short notice.

The flight opportunity onboard Alphasat Spacecraft, provided by ESA, allows European Space Industry to Space qualify a major ITAR free thermal hardware.
Challenges

The aims of this feasibility study are to address:


  • The two phase deployable radiator (DPR) system requirements definition,

  • The DPR development specifications and the related design analyses,

  • The interface control documentation,

  • The development logic and schedule,

  • The consolidated industrial team and funding requirement,

  • The DPR utilisation plan.
Benefits

The deployable radiator demonstrator is a major opportunity to place Europe at the same level as US prime constructors.

Features

 













click for larger image
click for larger image
 

click for larger image

The System architecture fit the scopes of the experiment. It is composed of following main items:


  • 4 High performances loop Heat Pipes fixed on the S/C Heat pipe network

  • 1 deployable CFRP radiator panel with embedded heaters & tubing. Both face are radiative area .

  • 4 Hold Down & Release Mechanisms common to the solar array ones connect the radiator to the platform during launch,

  • 1 Deployment Mechanism (axis inclined at 45º) to deploy the DPR (once on orbit & after Solar Array deployments) 

  • tubing to connect the 4 LHP²?s to the radiator (with flexible part at mechanism level to allow deployment) 

  • MLI , heaters

Main Performances:



  • Mass= 36Kg,

  • Max heat rejection with 4 LHP² =2015W

  • Max radiator heating to avoid freezing (>65ºC)= 670W

Risk are limited and mitigate through a 4 month technological validation phase initiated at beginning of the 28 month total development.

Plan

The tasks performed under the project are organised as follows:



























Task 1 Mission definition
Task 2 System design and analysis
Task 3 DPR architecture trade-off and baseline selection
Task 6 DPR Accommodation
Task 7 Design, Development & Verification plan
Task 8 Technology Pre-development
Task 9 Engineering plan for Phase B
Task 10 Industrial team, Phase B proposal & Cost estimate
Task 11 Preliminary Requirement Review
Current status

Status in October 2006:



  • The Final Preliminary Requirement Review has been held successfully at Toulouse the 24th of august. At this meeting, the results of Task 1 to 11 have been presented.

  • TDP day presentation was held at ESTEC the 29 of September

  • Data package with all due documents has been delivered

  • End of activities

Documentation

Documentation may be requested

Last update
2024-11-21 15:37