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AN ALL-METAL COMPACT HEAT EXCHANGER FOR SPACEBORNE CRYOCOOLERS

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
2775
Program Year/Program:
1987 / SBIR
Agency Tracking Number:
2775
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Creare Inc.
P.O. Box 71 Hanover, NH 03755-
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 1987
Title: AN ALL-METAL COMPACT HEAT EXCHANGER FOR SPACEBORNE CRYOCOOLERS
Agency: NASA
Contract: N/A
Award Amount: $218,000.00
 

Abstract:

THE OVERALL CYCLE EFFICIENCY (HENCE, INPUT POWER REQUIREMENTS) OF REVERSE-BRAYTON CRYOCOOLERS FOR SPACE APPLICATIONS IS HIGHLY SENSITIVE TO THE THERMAL EFFECTIVENESS OF THE HEAT EXCHANGERS. APPLICATIONS FOR THESE CRYOCOOLERS IN SPACE DICTATE THAT THESE HEAT EXCHANGERS BE AS SMALL AND LIGHT AS POSSIBLE. TO DATE, ONLYHEAT EXCHANGERS EMPLOYING ORGANIC MATERIALS HAVE BEEN ABLE TO ACHIEVE THE HIGH THERMAL EFFECTIVENESS VALUES REQUIRED FOR THESE SYSTEMS WITHIN THE ALLOWED SIZE AND WEIGHT LIMITATIONS. HOWEVER, HEAT EXCHANGERS WITH ORGANIC MATERIALS DEGRADE CYCLE PERFORMANCE BY LEAKAGE AND SYSTEM CONTAMINATION. THEREFORE, A COMPACT ALL-METAL HEAT EXCHANGER WITH HIGH THERMAL EFFECTIVENESS IS HIGHLY DESIRABLE. THIS PROPOSAL DESCRIBES A PROGRAM TO DEVELOP A HIGH PERFORMANCE, ALL METAL HEAT EXCHANGER. TWO HEAT EXCHANGER CONCEPTS WILL BE EVALUATED WITH RESPECT TO SIZE AND WEIGHT WITH THE AIM OF ACHIEVING A THERMAL EFFECTIVENESS IN EXCESS OF 0.98 WITH MINIMAL PRESSURE DROP. PHASE I WILL EXTEND EXISTING THEORETICAL MODELS AND OPTIMIZE THE EXCHANGER GEOMETRY WITH CONSIDERATION TO EFFECTIVENESS, PRESSURE DROP,WEIGHT, AND SIZE. FABRICATION AND ASSEMBLY TECHNIQUES OF KEY EXCHANGER ELEMENTS WILL ALSO BE DEMONSTRATED DURING PHASE I.

Principal Investigator:

Dr Herbert Sixsmith
Principal Investigator

Business Contact:

Small Business Information at Submission:

Creare Inc.
Po Box 71 Hanover, NH 03755

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No