Gas engine having intercooler

摘要

In a gas engine 1 that uses a gas having a lower specific gravity than air and has a pre-mixing device before a turbocharger, a pre-mixed gas mixture compressed by a turbocharger 3 is cooled by an intercooler 4 located downstream of the turbocharger 3 in the intake system. Condensed water produced as the gas is cooled and the pre-mixed gas mixture discharged with the condensed water are separated into condensed water, air, and fuel gas in a vapor-liquid separator 7. The fuel gas is returned to the intake system upstream of the turbocharger 3, while the condensed water is discharged to atmosphere.

主权项

1. A gas engine having an intercooler, comprising:
a turbocharger for compressing intake gas to the gas engine that uses a gas as fuel; a pre-mixing device provided before the turbocharger in an intake system and configured to mix a fuel gas with air to produce a pre-mixed gas mixture upstream of the turbocharger; the intercooler, which is located downstream of the turbocharger in the intake system, is configured to cool the pre-mixed gas mixture that has been compressed by the turbocharger, and has a drain valve for discharging condensed water produced through cooling of the pre-mixed gas mixture; a vapor-liquid separator configured to separate the pre-mixed gas mixture discharged with the condensed water, from the condensed water; a first conduit configured to communicate between the drain valve and the vapor-liquid separator, the first conduit introducing the condensed water discharged from the drain valve and the pre-mixed gas mixture discharged with the condensed water to the vapor-liquid separator; and a second conduit configured to return the pre-mixed gas mixture separated in the vapor-liquid separator to upstream of the turbocharger in the intake system, wherein the pre-mixed gas mixture returned to the upstream of the turbocharger in the intake system is configured to be supplied to the intercooler again after having been compressed in the turbocharger.