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Ovens & Freezers

Encyclopedia
Updated Aug 9, 2024

Introduction

NASA Johnson Space Center (JSC) provides capabilities to handle unique needs for temperature extremes. The Cold Stowage team offers controlled environments to meet precise temperature requirements during ascent, on-orbit operations, and return of payloads and science experiments, enabling unique ISS science and research. Additionally, JSC provides access to advanced thermal chambers, including autoclaves and ovens. These facilities are essential for curing, baking-out, or thermally conditioning composite structures and material samples. We invite our partners to leverage these cutting-edge capabilities for their own spaceflight endeavors, ensuring the highest standards in temperature-controlled environments and material conditioning. Partner with us to advance your scientific and engineering missions.

Capabilities

Cold Stowage 

Overview | The Cold Stowage team is part of the International Space Station (ISS) Program. JSC manages the operation, support and integration tasks provided by Jacobs Technology and the University of Alabama Birmingham (UAB). Cold stowage provides controlled environments to meet temperature requirements during ascent, on-orbit operations, and return, in relation to ISS payload science. 

Details | NASA’s vision for humans pursuing deep space flight involves the collection of science in low earth orbit aboard the ISS. As a service to the science community, JSC has developed hardware and processes to preserve collected science on the ISS and transfer it safely back to the Principal Investigators. These active and passive cold stowage systems include an array of freezers, refrigerators, and incubators. JSC’s Cold Stowage Lab can perform hold tests, fit checks, and thermal tests by request. Equipment in the lab allows the team to test articles at temperatures ranging between -196° C to +200° C. Cold Stowage also utilizes labs at Kennedy Space Center (KSC) and other vehicle processing locations. The team provides support to payload developers through launch, on-orbit operations, and landing.

Autoclaves & Ovens 

Overview | Autoclaves & ovens are thermal chambers used to cure, bake-out, or thermally condition composite structures and material samples.

Details |

Autoclaves are pressurized thermal chambers typically used for curing epoxies and resins in composite structures:

  • One autoclave onsite at JSC 
  • Sample sizes up to 7’ X 16’ 
  • Temperatures up to 600 degF 
  • Pressurized up to 30 PSI 

Ovens are unpressurized and typically used for heat-treating metals and thermally conditioning any material sample: 

  • Two ovens onsite at JSC
  • Sample sizes up to 4′ 
  • Temperatures up to 2000 degF
The Minus Eighty degree Laboratory Freezer for the International Space Station (MELFI) is a refrigerator/freezer used to preserve science samples on the ISS. MELFI has four insulated dewars which can be set independently to +2℃, -35℃, or -95℃.  There are currently 3 units on ISS.
iss049e053079 (9/23/2016) — NASA astronaut Kate Rubins is photographed in U.S. lab aboard the International Space Station (ISS) performing the second harvest of the Plant RNA Regulation experiment by stowing the European Modular Cultivation System (EMCS) Seed Cassettes from EMCS Rotors A and B in an EMCS Cold Stowage Pouch and placing them in Minus Eighty-Degree Laboratory Freezer for ISS (MELFI). The Plant RNA Regulation investigation studies the first steps of gene expression involved in development of roots and shoots. Scientists expect to find new molecules that play a role in how plants adapt and respond to the microgravity environment of space, which provides new insight into growing plants for food and oxygen supplies on long-duration missions. Sent as part of Russian Return imagery on 47S.