Waste heat recovery system of engine

A waste heat recovery system of an engine having an aftertreatment system, the waste heat recovery system comprising:

• an inlet member adapted to introduce exhaust gases in the aftertreatment system;
• a Selective Catalytic Reduction (SCR) module in fluid communication and attached downstream to the inlet member;
• and
• an outlet member adapted to receive the exhaust gases from the SCR module and attached downstream of the SCR module, the outlet member including:
• a first surface defining a passage for flow of the exhaust gases therethrough;
• and
• a second surface coupled with a power generation module, the power generation module including a plurality of power generating units, the plurality of power generating units having a first lead and second lead, the plurality of power generating units adapted to generate electric power based on a temperature gradient between the first lead and the second lead,
• wherein at least one of the first lead and the second lead is exposed to the exhaust gases flowing through the passage;
• wherein an electric load is coupled with the plurality of power generating units, the electric load adapted to utilize the power generated by the plurality of power generating units.