Oirats were fully submitted to Mongol rule after their ally Jamukha, Genghis's childhood friend and later rival, was destroyed. Subject to the khan Oirats would form themselves as a loyal and formidable faction of the Mongol war machine. In 1207, Jochi the eldest son of Genghis, subjugated the forest tribes including the Oirats and the Kyrgyzs.
A surface condenser is a commonly used term for a water-cooled shell and tube heat exchanger installed to condense exhaust steam from a steam turbine in thermal power stations. These condensers are heat exchangers which convert steam from its gaseous to its liquid state at a pressure below atmospheric pressure.Where cooling water is in short supply, an air-cooled condenser is often used.