Prestudy for Graphene based crycooler compressor

Purpose and goal

The project, a feasibility study identified a number of materials, subcontractors, possible construction/design of systems based on test results and simulations, as well as possible ways of processing of parts. It emerged some new difficulties but at the same time also verified the possibilities of using graphene-based films for critical parts of the system.

Results and expected effects

SHT has produced various types of graphene-based films and we have evaluated them both at Chalmers and at APR. The customization of the graphene material to achieve the critical combination of thermal conductivity and permeability has been shown to be possible to achieve by using micro-perforated graphene-based films. The thermal properties of the films has been verified and tested in breadboard setup giving input to updated simulations, the next step is now to evaluate (among other things) thicker graph -based films. Integration is a bit problematic but has been proven as possible.

Approach and implementation

The project started with the first visit at the SHT and then it has continued with regular teleconferences , usually with presentations from opposite directions . SHT has been producing films, and testing of the critical elements have occurred at Chalmers and in the updated test setup at APR being reasonably representative for a compressor cell. Together, we have discussed solutions to problems and ways forward for the project while APR have kept an overview and have been able to take most decisions.