No abstract

The hermetically sealed, single-cylinder Stirling engine of beta-type of a new concept with pressurized crankcase and permanently lubricated bearings has been tested as a demonstrator unit with provisional electric generators and a natural gas burner with the purpose of evaluating the concept.Test results show better values than predicted due to lower friction losses in bearings and internal seals. Starting can be made at lower gas temperatures than other kinematic Stirling engines.The balancing of inertia forces has turned out to be up to expectation and the permanently lubricated bearings have performed well.Continued evaluation will be made in the application prototype, which has the desired outside shape.

An in-depth study has been made of a 4-cy1inderf double-acting, hennatically sealed and in-line Stirling engine the results of which are presented in the form of drawings, calculated performance, and size and weight estimates.