| 摘要 |
A gas engine (10) includes a generator (16) coupled to an output shaft thereof, an intake passage (18) to which a low-concentration methane gas (VAM gas) derived from mine venting is supplied, and a gas mixing unit (54a to 54d) mixing a high-concentration methane gas (CMM gas) to the low-concentration methane gas midway along the intake passage (18), so that a gas mixture of the low-concentration methane gas and the high-concentration methane gas is supplied to and burnt in a combustion chamber. A turbocharger (30) is provided in the intake passage upstream of the gas mixing unit, and in the intake passage upstream of the turbocharger, is provided a mixture ratio adjusting unit (26, 28) adjusting a mixture ratio of the low-concentration methane gas and the air. The temperature or flow rate of intake gas flowing into the turbocharger (30) is kept in a constant range by an intake controller (90A). |
