NASA 1996 SBIR Phase I


PROPOSAL NUMBER : 96-1 16.10-3800

PROJECT TITLE : Single Machine for High Efficiency Cryocooling, Refrigeration, and Heat Pumping Applications

TECHNICAL ABSTRACT (LIMIT 200 WORDS)

Creare proposes to develop and demonstrate a refrigeration and freezing system which offers an environmentally benign working fluid (helium), quiet operation, high reliability, and improved efficiency and reduced mass relative to present systems. The reliability of the critical components in this machine design have already been proven on small capacity, spaceborne cryocoolers using our Diaphragm Refrigeration Technology. The proposed innovation is a method of increasing the capacity of this machine design several orders of magnitude, while at the same time combining the volumetric and heat exchange components. This innovation eleminatesthe performance and size limits found in conventional Stirling machines employing pistons. In this project, we propose to develop a prototype which demonstrates that this technology addresses the full spectrum of NASA and commercial refrigeration, heat pumping, and air conditioning requirements.

In Phase I, Creare will: 1) produce a preliminary prototype design for one selected application, 2) demonstrate the fabrication method and dynamic performance of the critical component, and 3) experimentally verify the heat transfer performance which is fundamental to the superior thermodynamic performance. In Phase II, we will build and test the prototype to document efficiency, demonstrate reliability through the accumulation of operating hours, and identify issues for space qualification testing.

POTENTIAL COMMERCIAL APPLICATIONS
This technology is applicable to a full spectrum of commercial needs for residential, commercial, and transportation refrigeration and air conditioning, and commercial coolers and heat pumps. Unlike the current generation of adaptations replacing CFCs with other environmentally questionable, toxic, or hazardous chemicals, the proposed technology begins with benign fluids - air or helium - and offers improved efficiency with excellent reliability.
NAME AND ADDRESS OF PRINCIPAL INVESTIGATOR
Martin A. Shimko
Creare Incorporated
P.O. Box 71
Hanover, NH 03755
NAME AND ADDRESS OF OFFEROR
Creare Incorporated
P.O. Box 71
Hanover, NH 03755