Sound attenuating heat exchanger for an internal combustion engine

A power system, comprising:

• a power generator including an exhaust outlet;
• a refrigeration unit including a coolant inlet and a coolant outlet;
• and
• a sound attenuating heat exchanger including:
• an exhaust flow passage connected to the exhaust outlet;
• a coolant flow passage connected between the coolant inlet and the coolant outlet;
• a barrier wall fluidly separating the exhaust flow passage from the coolant flow passage;
• and
• one or more fins extending from the barrier wall into the exhaust flow passage, each including one or more Helmholtz resonators that are adapted to attenuate sound waves traveling through exhaust gas within the exhaust flow passage;
• wherein the barrier wall and the fins are adapted to exchange heat energy between the exhaust gas flowing through the exhaust flow passage and coolant flowing through the coolant flow passage;
• wherein the resonators include a first resonator and a second resonator, which first resonator is adapted to attenuate sound waves having a first frequency, and which second resonator is adapted to attenuate sound waves having a second frequency that is different than the first frequency.

A sound attenuating heat exchanger for an internal combustion engine, comprising:

• a housing including an exhaust inlet, an exhaust outlet, a coolant inlet and a coolant outlet, wherein the exhaust inlet is connected to the exhaust outlet by an exhaust flow passage, and wherein the coolant inlet is connected to the coolant outlet by a coolant flow passage;
• a barrier wall fluidly separating the exhaust flow passage from the coolant flow passage;
• and
• one or more fins extending from the barrier wall into the exhaust flow passage, each including one or more Helmholtz resonators that are adapted to attenuate sound waves traveling through exhaust gas within the exhaust flow passage;
• wherein the barrier wall and the fins are adapted to exchange heat energy between the exhaust gas flowing through the exhaust flow passage and coolant flowing through the coolant flow passage;
• wherein the resonators include a first resonator and a second resonator, which first resonator is adapted to attenuate sound waves having a first frequency, and which second resonator is adapted to attenuate sound waves having a second frequency that is different than the first frequency.