Advance ignition angle adjustment for engine fueled with biogas-syngas-hydrogen in hybrid renewable energy system

Abstract

Pressure, combustion temperature and NO_x emission escalate with the increase in advance ignition angle. The indicative engine cycle work reaches the maximum value corresponding to the optimal advance igntion angle which depends on the fuel compositions. With a given biogas-hydrogen fuel mixture, the average optimal advance ignition angle increased by 2°TK when the syngas content in the mixture grown by 20%. For a given biogas-syngas mixture, the optimal advance ignition angle decreases linearly with increasing hydrogen content with a reduction rate of about 0.43 (°TK/%H₂). With a given ignition advance angle, NO_x decreases with increasing syngas content. The ignition system of the traditional stationary engine can be converted into an electronically controlled ignition system to automatically adjust the advance ignition angle to suit the operating conditions of the engine in the hybrid renewable energy system. The system simply consists of a Hall sensor, an integrated ignition cluster and a microcontroller with a program to adjust the advance ignition angle according to the fuel compositions.