Gas engine heat pump

A gas engine heat pump, comprising:

• an engine that burns a mixture of air and fuel;
• an intake flow path through which the mixture is introduced into the engine;
• an exhaust flow path through which exhaust gas discharged from the engine flows, wherein the exhaust flow path is branched into a first exhaust flow path, a second exhaust flow path, and a third exhaust flow path, respectively, and then merged into a fourth exhaust flow path that discharges exhaust gas to outside, and wherein the exhaust flow path further includes a recirculation flow path branched from the fourth exhaust flow path to introduce exhaust gas into the engine;
• a first charger including a first compressor that is installed at the intake flow path and compresses the mixture of air and fuel and supplies the mixture of air and fuel to the engine, and a first turbine that is installed at the first exhaust flow path and receives exhaust gas directed from the first exhaust flow path to the fourth exhaust flow path to drive the first compressor;
• a second charger including a second compressor that compresses exhaust gas passing through the recirculation flow path and supplies exhaust gas to the engine, and a second turbine that is installed at the second exhaust flow path and receives exhaust gas directed from the second exhaust flow path to the fourth exhaust flow path to drive the second compressor;
• a first bypass valve installed at the second exhaust flow path, an opening rate of which is adjusted to control a flow amount of exhaust gas flowing from the second exhaust flow path to the fourth exhaust flow path;
• a second bypass valve installed at the third exhaust flow path, an opening rate of which is adjusted to control a flow amount of exhaust gas flowing from the third exhaust flow path to the fourth exhaust flow path;
• and
• a controller that adjusts the opening rate of the first bypass valve and the opening rate of the second bypass valve.