Abstract
As a power source for emergency power supply, a Stirling engine has received a keen interest due to its high thermal efficiency as well as its fuel diversity. In this study, a tubular flame burner has been developed for heating the head of a Stirling engine. Results show that stable combustion can be obtained for a wide range in equivalence ratio from stoichiometric to near lean-limit mixtures, and that the head temperature, the electric power generation as well as the thermal efficiency of the Stirling engine are increased with decreasing the equivalence ratio under a constant heat input condition. This seems due to an increase of air flow rate, and hence, due to an increase of heat transfer rate. The maximum thermal efficiency obtained is 9.2 %.
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