Exhaust gas heat exchanger for cogeneration system

An exhaust gas heat exchanger for a cogeneration system comprising:

• a heat exchanger body provided with an exhaust gas inlet, through which exhaust gas discharged from an engine is introduced into the heat exchanger body, and an exhaust gas outlet, through which the exhaust gas is discharged from the heat exchanger body;
• a heat exchanger cover arranged to enclose the heat exchanger body such that a primary heat medium passage, through which a heat medium passes, is defined between an outer wall surface of the heat exchanger body and an inner wall surface of the heat exchanger cover;
• a heat medium tube arranged to extend through the heat exchanger body, and adapted to form a secondary heat medium passage, through which the heat medium emerging from the primary heat medium passage passes;
• and
• a flow guide arranged in the primary heat medium passage to vary a flow path defined by the primary heat medium passage.

An exhaust gas heat exchanger for a cogeneration system comprising:

• a heat exchanger body provided with an exhaust gas inlet, through which exhaust gas discharged from an engine is introduced into the heat exchanger body, and an exhaust gas outlet, through which the exhaust gas is discharged from the heat exchanger body;
• a heat exchanger cover arranged to enclose the heat exchanger body such that a primary heat medium passage, through which a heat medium passes, is defined between an outer wall surface of the heat exchanger body and an inner wall surface of the heat exchanger cover;
• a heat medium tube arranged to extend through the heat exchanger body, and adapted to form a secondary heat medium passage, through which the heat medium emerging from the primary heat medium passage passes;
• and
• a mesh member arranged between an inner wall surface of the heat exchanger body and the heat medium tube, and adapted to diffuse the exhaust gas in the heat exchanger body.