Abstract
As a power source for emergency power supply, a Stirling engine has received 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. To avoid flame flashback rapidly-mixed type tubular flame burner, in which fuel and oxidizer are separately injected, has been adopted. The fuel used is a biogas, which consists of 60% methane and 40% carbon dioxide by volume. Results show that stable combustion can be obtained for a wide range in equivalence ratio and in heat input. With a decrease of equivalence ratio, the head temperature, electric power generation and thermal efficiency are increased for a constant heat input, and a maximum thermal efficiency of about 8% has been achieved.
