Опубликована: Янв. 1, 2023

In this paper, a novel gas combustor with multiple nozzles is proposed to couple free-piston Stirling electric generator (FPSG) for distributed power application. Due the simple layout of and intrinsic external combustion FPSG, system highly adaptive fuels, such as butane, natural liquefied petroleum (LPG). order unravel heat transfer characteristics internal oscillating flow, rigorous numerical simulation was conducted, series experiments were carried out verify calculations. Initially, an in-depth analysis performed in terms flow field, temperature distribution flux density within combustor. The effects inlet rate, nozzle structure, preheating on explored. Numerical calculations reveal that, at fuel rate 0.55 Nm3/h air-fuel ratio 24, high-temperature exchanger (HHX) absorbs 6.41 kW heating power, convective occupying approximately 73.5%. Moreover, simulations unveil significant influence optimizing ratio, enhancing overall performance achieving air consumption reductions. Subsequently, we meticulously conducted experimental investigations comprehensively evaluate combustor-coupled FPSG. results demonstrate under Nm3/h, achieves output 1531 W, corresponding net thermal-to-electric efficiency fuel-to-electric 30.9% 9.6%, respectively.

Язык: Английский