This chapter overviews the heat recovery with power generation plants. The significance of captive power plants has been highlighted. Different heat recovery arrangements as per the category of thermal power cycle have been discussed. The power plant layouts of organic Rankine cycle (ORC), organic flash cycle (OFC), Kalina cycle (KC), steam Rankine cycle (SRC) and steam flash cycle (SFC) are deliberated. The subsequent chapters are focused on the detailed study of thermal cycles of heat recovery power plants.