| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce an exhaust level of NOx according to the demand of a customer in a constantly stable state and to stabilize performance of a gas engine, in a cogeneration system using a lean combustion gas engine. SOLUTION: A humidity sensor S2 detects humidity of air sucked by a gas engine 11. Based on the detected humidity, an ECU 117 adjusts an excess air factor for the gas engine 11 so that an exhaust level of NOx is prevented from changing with the discharge level exceeding a predetermined range. This constitution achieves reduction of an exhaust level of NOx according to a demand of a customer in a normally stable state and stabilizes performance of the gas engine 11.</p> |
