SPACE SUIT THERMAL CONTROL USING NON-TOXIC MICROENCAPSULATEDPCM TWO-PHASE FLUID

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$49,993.00
Award Year:
1988
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Agency Tracking Number:
6671
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Triangle Research & Developmnt
Po 12696, Resrch Triangle Pk, NC, 27709
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
DAVID P COLVIN PH D
() -
Business Contact:
() -
Research Institution:
n/a
Abstract
A TWO-COMPONENT HEAT TRANSFER FLUID WHICH CONSISTS OF CAPSULES OF MICROENCAPSULATED PHASE-CHANGE MATERIAL (PCM) SUSPENDED IN WATER IS TO BE DEVELOPED FOR APPLICATION TO CLOSED SYSTEM LIQUID-COUPLED HEAT EXCHANGE WITHIN A SPACE SUIT (EMU). THE TWO-COMPONENT FLUID (SLURRY) WILL CONSIST OF APPROXIMATELY 30% BY WEIGHT OF PCM CAPSULES OF APPROXIMATELY 25 MICRONS IN DIAMETER. THE PCM WILL PROBABLYBE EITHER TETRADECANE (5.9 DEGREE(C) MELTING TEMPERATURE), OR HEXADECANE (18.2 DEGREE(") MELTING TEMPERATURE), MICROENCAPSULATED IN A POLYMER SHELL OF APPROXIMATELY 1 MICRON WALL THICKNESS. SUCH A TWO-COMPONENT FLUID HAS BEEN SHOWN TO HAVE TWICE THE HEAT TRANSFER COEFFICIENT OF WATER AND FIVE TO SIX TIMES THE THERMAL CAPACITANCE. A PCM STORAGE MODULE IS ALSO TO BE DESIGNED FOR INTEGRATING WITH THE PCM FLUID, TO FORM AN INTEGRAL PCM FLUID/STORAGE SYSTEM WHICH POTENTIALLY CAN BE USED AS A NON-TOXIC AND NONEXPENDABLE TEMPERATURE CONTROL SYSTEM FOR AN EMU (SPACE SUIT). A COMPUTER MODEL AND LABORATORY SIMULATION OFSUCH A SYSTEM IS TO BE DEVELOPED. SUCH A SYSTEM IS POTENTIALLY CAPABLE OF IMPROVING EFFECTIVENESS AND CAPACITY OF AN EMU WHILE MINIMIZING SPACE RADIATOR SIZE AND PUMPING REQUIREMENTS.

* information listed above is at the time of submission.

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